elf64.c
elfxx-target.h
elfcode.h
+elfcore.h
+elflink.c
+elflink.h
filemode.c
format.c
gen-aout.c
+Wed Jul 5 20:17:14 1995 Ken Raeburn <raeburn@cygnus.com>
+
+ * elfcore.h, elflink.h, elfcode.h, elf.c, elflink.c: Moved some
+ primarily size-independent code from elfcode.h to elf.c and new
+ file elflink.c; moved out other core- or linker-related routines
+ into other new .h files for clarity. Renamed many routines to
+ start with bfd_elf or _bfd_elf. Added a structure of
+ size-dependent but target-independent info to elfcode.h.
+ * Makefile.in: Build elflink.o. Update dependencies.
+ * libelf.h: Updated some declarations. Added a definition for the
+ new structure in elfcode.h. Added more fields to elf backend data
+ structure.
+ * elfxx-target.h: Refer to the appropriate size-dependent info.
+ * elf32-*.c: Changed some function names. Moved common
+ create_dynamic_sections code from m68k, sparc, and i386 support
+ into elflink.c. Define some new macros to fill in new fields of
+ back end data. Also clean up some "gcc -Wall" warnings regarding
+ unused or uninitialized variables.
+
Wed Jul 5 10:31:47 1995 Ian Lance Taylor <ian@cygnus.com>
* elf32-mips.c (mips_elf_object_p): Unconditionally set
archive.o archures.o bfd.o cache.o coffgen.o core.o \
format.o init.o libbfd.o opncls.o reloc.o \
section.o syms.o targets.o hash.o linker.o \
- elf.o srec.o binary.o tekhex.o
+ elf.o elflink.o srec.o binary.o tekhex.o
# This list is alphabetized to make it easier to keep in sync
# with the decls and initializer in archures.c.
cpu-sh.o: cpu-sh.c
elf.o: elf.c $(INCDIR)/bfdlink.h libelf.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h
-elf32.o: elf32.c elfcode.h $(INCDIR)/bfdlink.h libelf.h \
+elflink.o : elflink.c $(INCDIR)/bfdlink.h libelf.h $(INCDIR)/elf/common.h \
+ $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h
+elf32.o: elf32.c elfcode.h $(INCDIR)/bfdlink.h libelf.h elfcore.h elflink.h \
$(INCDIR)/elf/common.h $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h
elf32-sparc.o: elf32-sparc.c $(INCDIR)/bfdlink.h libelf.h \
$(INCDIR)/elf/common.h $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h \
elf32-ppc.o: elf32-ppc.c $(INCDIR)/bfdlink.h libelf.h \
$(INCDIR)/elf/common.h $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h \
$(INCDIR)/elf/ppc.h elf32-target.h
-elf64.o: elf64.c elfcode.h $(INCDIR)/bfdlink.h libelf.h \
+elf64.o: elf64.c elfcode.h $(INCDIR)/bfdlink.h libelf.h elfcore.h elflink.h \
$(INCDIR)/elf/common.h $(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h
elf64-gen.o: elf64-gen.c libelf.h $(INCDIR)/elf/common.h \
$(INCDIR)/elf/internal.h $(INCDIR)/elf/external.h $(INCDIR)/bfdlink.h \
#define ARCH_SIZE 0
#include "libelf.h"
+static file_ptr map_program_segments PARAMS ((bfd *, file_ptr,
+ Elf_Internal_Shdr *,
+ Elf_Internal_Shdr **,
+ bfd_size_type));
+static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean));
+static boolean prep_headers PARAMS ((bfd *));
+static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
+
/* Standard ELF hash function. Do not change this function; you will
cause invalid hash tables to be generated. (Well, you would if this
were being used yet.) */
}
char *
-elf_get_str_section (abfd, shindex)
+bfd_elf_get_str_section (abfd, shindex)
bfd * abfd;
unsigned int shindex;
{
}
char *
-elf_string_from_elf_section (abfd, shindex, strindex)
+bfd_elf_string_from_elf_section (abfd, shindex, strindex)
bfd * abfd;
unsigned int shindex;
unsigned int strindex;
hdr = elf_elfsections (abfd)[shindex];
if (hdr->contents == NULL
- && elf_get_str_section (abfd, shindex) == NULL)
+ && bfd_elf_get_str_section (abfd, shindex) == NULL)
return NULL;
return ((char *) hdr->contents) + strindex;
i_shdrp = elf_elfsections (abfd);
if (i_shdrp != NULL)
{
- shstrtab = elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
+ shstrtab = bfd_elf_get_str_section (abfd, elf_elfheader (abfd)->e_shstrndx);
if (shstrtab != NULL)
{
max = elf_elfheader (abfd)->e_shnum;
{
return elf_hash_table (info)->needed;
}
+\f
+/* Allocate an ELF string table--force the first byte to be zero. */
+
+struct bfd_strtab_hash *
+_bfd_elf_stringtab_init ()
+{
+ struct bfd_strtab_hash *ret;
+
+ ret = _bfd_stringtab_init ();
+ if (ret != NULL)
+ {
+ bfd_size_type loc;
+
+ loc = _bfd_stringtab_add (ret, "", true, false);
+ BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
+ if (loc == (bfd_size_type) -1)
+ {
+ _bfd_stringtab_free (ret);
+ ret = NULL;
+ }
+ }
+ return ret;
+}
+\f
+/* ELF .o/exec file reading */
+
+/* Create a new bfd section from an ELF section header. */
+
+boolean
+bfd_section_from_shdr (abfd, shindex)
+ bfd *abfd;
+ unsigned int shindex;
+{
+ Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
+ Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ char *name;
+
+ name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
+
+ switch (hdr->sh_type)
+ {
+ case SHT_NULL:
+ /* Inactive section. Throw it away. */
+ return true;
+
+ case SHT_PROGBITS: /* Normal section with contents. */
+ case SHT_DYNAMIC: /* Dynamic linking information. */
+ case SHT_NOBITS: /* .bss section. */
+ case SHT_HASH: /* .hash section. */
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_SYMTAB: /* A symbol table */
+ if (elf_onesymtab (abfd) == shindex)
+ return true;
+
+ BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
+ BFD_ASSERT (elf_onesymtab (abfd) == 0);
+ elf_onesymtab (abfd) = shindex;
+ elf_tdata (abfd)->symtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr;
+ abfd->flags |= HAS_SYMS;
+
+ /* Sometimes a shared object will map in the symbol table. If
+ SHF_ALLOC is set, and this is a shared object, then we also
+ treat this section as a BFD section. We can not base the
+ decision purely on SHF_ALLOC, because that flag is sometimes
+ set in a relocateable object file, which would confuse the
+ linker. */
+ if ((hdr->sh_flags & SHF_ALLOC) != 0
+ && (abfd->flags & DYNAMIC) != 0
+ && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
+ return false;
+
+ return true;
+
+ case SHT_DYNSYM: /* A dynamic symbol table */
+ if (elf_dynsymtab (abfd) == shindex)
+ return true;
+
+ BFD_ASSERT (hdr->sh_entsize == bed->s->sizeof_sym);
+ BFD_ASSERT (elf_dynsymtab (abfd) == 0);
+ elf_dynsymtab (abfd) = shindex;
+ elf_tdata (abfd)->dynsymtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr;
+ abfd->flags |= HAS_SYMS;
+
+ /* Besides being a symbol table, we also treat this as a regular
+ section, so that objcopy can handle it. */
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_STRTAB: /* A string table */
+ if (hdr->bfd_section != NULL)
+ return true;
+ if (ehdr->e_shstrndx == shindex)
+ {
+ elf_tdata (abfd)->shstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
+ return true;
+ }
+ {
+ unsigned int i;
+
+ for (i = 1; i < ehdr->e_shnum; i++)
+ {
+ Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
+ if (hdr2->sh_link == shindex)
+ {
+ if (! bfd_section_from_shdr (abfd, i))
+ return false;
+ if (elf_onesymtab (abfd) == i)
+ {
+ elf_tdata (abfd)->strtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] =
+ &elf_tdata (abfd)->strtab_hdr;
+ return true;
+ }
+ if (elf_dynsymtab (abfd) == i)
+ {
+ elf_tdata (abfd)->dynstrtab_hdr = *hdr;
+ elf_elfsections (abfd)[shindex] =
+ &elf_tdata (abfd)->dynstrtab_hdr;
+ /* We also treat this as a regular section, so
+ that objcopy can handle it. */
+ break;
+ }
+#if 0 /* Not handling other string tables specially right now. */
+ hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
+ /* We have a strtab for some random other section. */
+ newsect = (asection *) hdr2->bfd_section;
+ if (!newsect)
+ break;
+ hdr->bfd_section = newsect;
+ hdr2 = &elf_section_data (newsect)->str_hdr;
+ *hdr2 = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr2;
+#endif
+ }
+ }
+ }
+
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ case SHT_REL:
+ case SHT_RELA:
+ /* *These* do a lot of work -- but build no sections! */
+ {
+ asection *target_sect;
+ Elf_Internal_Shdr *hdr2;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+
+ /* Get the symbol table. */
+ if (! bfd_section_from_shdr (abfd, hdr->sh_link))
+ return false;
+
+ /* If this reloc section does not use the main symbol table we
+ don't treat it as a reloc section. BFD can't adequately
+ represent such a section, so at least for now, we don't
+ try. We just present it as a normal section. */
+ if (hdr->sh_link != elf_onesymtab (abfd))
+ return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
+
+ /* Don't allow REL relocations on a machine that uses RELA and
+ vice versa. */
+ /* @@ Actually, the generic ABI does suggest that both might be
+ used in one file. But the four ABI Processor Supplements I
+ have access to right now all specify that only one is used on
+ each of those architectures. It's conceivable that, e.g., a
+ bunch of absolute 32-bit relocs might be more compact in REL
+ form even on a RELA machine... */
+ BFD_ASSERT (use_rela_p
+ ? (hdr->sh_type == SHT_RELA
+ && hdr->sh_entsize == bed->s->sizeof_rela)
+ : (hdr->sh_type == SHT_REL
+ && hdr->sh_entsize == bed->s->sizeof_rel));
+
+ if (! bfd_section_from_shdr (abfd, hdr->sh_info))
+ return false;
+ target_sect = bfd_section_from_elf_index (abfd, hdr->sh_info);
+ if (target_sect == NULL)
+ return false;
+
+ hdr2 = &elf_section_data (target_sect)->rel_hdr;
+ *hdr2 = *hdr;
+ elf_elfsections (abfd)[shindex] = hdr2;
+ target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
+ target_sect->flags |= SEC_RELOC;
+ target_sect->relocation = NULL;
+ target_sect->rel_filepos = hdr->sh_offset;
+ abfd->flags |= HAS_RELOC;
+ return true;
+ }
+ break;
+
+ case SHT_NOTE:
+#if 0
+ fprintf (stderr, "Note Sections not yet supported.\n");
+ BFD_FAIL ();
+#endif
+ break;
+
+ case SHT_SHLIB:
+#if 0
+ fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n");
+#endif
+ return true;
+
+ default:
+ /* Check for any processor-specific section types. */
+ {
+ if (bed->elf_backend_section_from_shdr)
+ (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
+ }
+ break;
+ }
+
+ return true;
+}
+
+/* Given an ELF section number, retrieve the corresponding BFD
+ section. */
+
+asection *
+bfd_section_from_elf_index (abfd, index)
+ bfd *abfd;
+ unsigned int index;
+{
+ BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
+ if (index >= elf_elfheader (abfd)->e_shnum)
+ return NULL;
+ return elf_elfsections (abfd)[index]->bfd_section;
+}
+
+boolean
+_bfd_elf_new_section_hook (abfd, sec)
+ bfd *abfd;
+ asection *sec;
+{
+ struct bfd_elf_section_data *sdata;
+
+ sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
+ if (!sdata)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ sec->used_by_bfd = (PTR) sdata;
+ memset (sdata, 0, sizeof (*sdata));
+ return true;
+}
+
+/* Create a new bfd section from an ELF program header.
+
+ Since program segments have no names, we generate a synthetic name
+ of the form segment<NUM>, where NUM is generally the index in the
+ program header table. For segments that are split (see below) we
+ generate the names segment<NUM>a and segment<NUM>b.
+
+ Note that some program segments may have a file size that is different than
+ (less than) the memory size. All this means is that at execution the
+ system must allocate the amount of memory specified by the memory size,
+ but only initialize it with the first "file size" bytes read from the
+ file. This would occur for example, with program segments consisting
+ of combined data+bss.
+
+ To handle the above situation, this routine generates TWO bfd sections
+ for the single program segment. The first has the length specified by
+ the file size of the segment, and the second has the length specified
+ by the difference between the two sizes. In effect, the segment is split
+ into it's initialized and uninitialized parts.
+
+ */
+
+boolean
+bfd_section_from_phdr (abfd, hdr, index)
+ bfd *abfd;
+ Elf_Internal_Phdr *hdr;
+ int index;
+{
+ asection *newsect;
+ char *name;
+ char namebuf[64];
+ int split;
+
+ split = ((hdr->p_memsz > 0) &&
+ (hdr->p_filesz > 0) &&
+ (hdr->p_memsz > hdr->p_filesz));
+ sprintf (namebuf, split ? "segment%da" : "segment%d", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
+ newsect->vma = hdr->p_vaddr;
+ newsect->_raw_size = hdr->p_filesz;
+ newsect->filepos = hdr->p_offset;
+ newsect->flags |= SEC_HAS_CONTENTS;
+ if (hdr->p_type == PT_LOAD)
+ {
+ newsect->flags |= SEC_ALLOC;
+ newsect->flags |= SEC_LOAD;
+ if (hdr->p_flags & PF_X)
+ {
+ /* FIXME: all we known is that it has execute PERMISSION,
+ may be data. */
+ newsect->flags |= SEC_CODE;
+ }
+ }
+ if (!(hdr->p_flags & PF_W))
+ {
+ newsect->flags |= SEC_READONLY;
+ }
+
+ if (split)
+ {
+ sprintf (namebuf, "segment%db", index);
+ name = bfd_alloc (abfd, strlen (namebuf) + 1);
+ if (!name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ strcpy (name, namebuf);
+ newsect = bfd_make_section (abfd, name);
+ if (newsect == NULL)
+ return false;
+ newsect->vma = hdr->p_vaddr + hdr->p_filesz;
+ newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
+ if (hdr->p_type == PT_LOAD)
+ {
+ newsect->flags |= SEC_ALLOC;
+ if (hdr->p_flags & PF_X)
+ newsect->flags |= SEC_CODE;
+ }
+ if (!(hdr->p_flags & PF_W))
+ newsect->flags |= SEC_READONLY;
+ }
+
+ return true;
+}
+
+/* Set up an ELF internal section header for a section. */
+
+/*ARGSUSED*/
+static void
+elf_fake_sections (abfd, asect, failedptrarg)
+ bfd *abfd;
+ asection *asect;
+ PTR failedptrarg;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ boolean *failedptr = (boolean *) failedptrarg;
+ Elf_Internal_Shdr *this_hdr;
+
+ if (*failedptr)
+ {
+ /* We already failed; just get out of the bfd_map_over_sections
+ loop. */
+ return;
+ }
+
+ this_hdr = &elf_section_data (asect)->this_hdr;
+
+ this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
+ asect->name,
+ true, false);
+ if (this_hdr->sh_name == (unsigned long) -1)
+ {
+ *failedptr = true;
+ return;
+ }
+
+ this_hdr->sh_flags = 0;
+ if ((asect->flags & SEC_ALLOC) != 0)
+ this_hdr->sh_addr = asect->vma;
+ else
+ this_hdr->sh_addr = 0;
+ this_hdr->sh_offset = 0;
+ this_hdr->sh_size = asect->_raw_size;
+ this_hdr->sh_link = 0;
+ this_hdr->sh_info = 0;
+ this_hdr->sh_addralign = 1 << asect->alignment_power;
+ this_hdr->sh_entsize = 0;
+
+ this_hdr->bfd_section = asect;
+ this_hdr->contents = NULL;
+
+ /* FIXME: This should not be based on section names. */
+ if (strcmp (asect->name, ".dynstr") == 0)
+ this_hdr->sh_type = SHT_STRTAB;
+ else if (strcmp (asect->name, ".hash") == 0)
+ {
+ this_hdr->sh_type = SHT_HASH;
+ this_hdr->sh_entsize = bed->s->arch_size / 8;
+ }
+ else if (strcmp (asect->name, ".dynsym") == 0)
+ {
+ this_hdr->sh_type = SHT_DYNSYM;
+ this_hdr->sh_entsize = bed->s->sizeof_sym;
+ }
+ else if (strcmp (asect->name, ".dynamic") == 0)
+ {
+ this_hdr->sh_type = SHT_DYNAMIC;
+ this_hdr->sh_entsize = bed->s->sizeof_dyn;
+ }
+ else if (strncmp (asect->name, ".rela", 5) == 0
+ && get_elf_backend_data (abfd)->use_rela_p)
+ {
+ this_hdr->sh_type = SHT_RELA;
+ this_hdr->sh_entsize = bed->s->sizeof_rela;
+ }
+ else if (strncmp (asect->name, ".rel", 4) == 0
+ && ! get_elf_backend_data (abfd)->use_rela_p)
+ {
+ this_hdr->sh_type = SHT_REL;
+ this_hdr->sh_entsize = bed->s->sizeof_rel;
+ }
+ else if (strcmp (asect->name, ".note") == 0)
+ this_hdr->sh_type = SHT_NOTE;
+ else if (strncmp (asect->name, ".stab", 5) == 0
+ && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
+ this_hdr->sh_type = SHT_STRTAB;
+ else if ((asect->flags & SEC_ALLOC) != 0
+ && (asect->flags & SEC_LOAD) != 0)
+ this_hdr->sh_type = SHT_PROGBITS;
+ else if ((asect->flags & SEC_ALLOC) != 0
+ && ((asect->flags & SEC_LOAD) == 0))
+ {
+ BFD_ASSERT (strcmp (asect->name, ".bss") == 0
+ || strcmp (asect->name, ".sbss") == 0
+ || strcmp (asect->name, ".scommon") == 0
+ || strcmp (asect->name, "COMMON") == 0);
+ this_hdr->sh_type = SHT_NOBITS;
+ }
+ else
+ {
+ /* Who knows? */
+ this_hdr->sh_type = SHT_PROGBITS;
+ }
+
+ if ((asect->flags & SEC_ALLOC) != 0)
+ this_hdr->sh_flags |= SHF_ALLOC;
+ if ((asect->flags & SEC_READONLY) == 0)
+ this_hdr->sh_flags |= SHF_WRITE;
+ if ((asect->flags & SEC_CODE) != 0)
+ this_hdr->sh_flags |= SHF_EXECINSTR;
+
+ /* Check for processor-specific section types. */
+ {
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (bed->elf_backend_fake_sections)
+ (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
+ }
+
+ /* If the section has relocs, set up a section header for the
+ SHT_REL[A] section. */
+ if ((asect->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Shdr *rela_hdr;
+ int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
+ char *name;
+
+ rela_hdr = &elf_section_data (asect)->rel_hdr;
+ name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
+ if (name == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ *failedptr = true;
+ return;
+ }
+ sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
+ rela_hdr->sh_name =
+ (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
+ true, false);
+ if (rela_hdr->sh_name == (unsigned int) -1)
+ {
+ *failedptr = true;
+ return;
+ }
+ rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
+ rela_hdr->sh_entsize = (use_rela_p
+ ? bed->s->sizeof_rela
+ : bed->s->sizeof_rel);
+ rela_hdr->sh_addralign = bed->s->file_align;
+ rela_hdr->sh_flags = 0;
+ rela_hdr->sh_addr = 0;
+ rela_hdr->sh_size = 0;
+ rela_hdr->sh_offset = 0;
+ }
+}
+
+/* Assign all ELF section numbers. The dummy first section is handled here
+ too. The link/info pointers for the standard section types are filled
+ in here too, while we're at it. */
+
+static boolean
+assign_section_numbers (abfd)
+ bfd *abfd;
+{
+ struct elf_obj_tdata *t = elf_tdata (abfd);
+ asection *sec;
+ unsigned int section_number;
+ Elf_Internal_Shdr **i_shdrp;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ section_number = 1;
+
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+
+ d->this_idx = section_number++;
+ if ((sec->flags & SEC_RELOC) == 0)
+ d->rel_idx = 0;
+ else
+ d->rel_idx = section_number++;
+ }
+
+ t->shstrtab_section = section_number++;
+ elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
+ t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
+
+ if (abfd->symcount > 0)
+ {
+ t->symtab_section = section_number++;
+ t->strtab_section = section_number++;
+ }
+
+ elf_elfheader (abfd)->e_shnum = section_number;
+
+ /* Set up the list of section header pointers, in agreement with the
+ indices. */
+ i_shdrp = ((Elf_Internal_Shdr **)
+ bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
+ if (i_shdrp == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ i_shdrp[0] = ((Elf_Internal_Shdr *)
+ bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
+ if (i_shdrp[0] == NULL)
+ {
+ bfd_release (abfd, i_shdrp);
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
+
+ elf_elfsections (abfd) = i_shdrp;
+
+ i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
+ if (abfd->symcount > 0)
+ {
+ i_shdrp[t->symtab_section] = &t->symtab_hdr;
+ i_shdrp[t->strtab_section] = &t->strtab_hdr;
+ t->symtab_hdr.sh_link = t->strtab_section;
+ }
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ struct bfd_elf_section_data *d = elf_section_data (sec);
+ asection *s;
+ const char *name;
+
+ i_shdrp[d->this_idx] = &d->this_hdr;
+ if (d->rel_idx != 0)
+ i_shdrp[d->rel_idx] = &d->rel_hdr;
+
+ /* Fill in the sh_link and sh_info fields while we're at it. */
+
+ /* sh_link of a reloc section is the section index of the symbol
+ table. sh_info is the section index of the section to which
+ the relocation entries apply. */
+ if (d->rel_idx != 0)
+ {
+ d->rel_hdr.sh_link = t->symtab_section;
+ d->rel_hdr.sh_info = d->this_idx;
+ }
+
+ switch (d->this_hdr.sh_type)
+ {
+ case SHT_REL:
+ case SHT_RELA:
+ /* A reloc section which we are treating as a normal BFD
+ section. sh_link is the section index of the symbol
+ table. sh_info is the section index of the section to
+ which the relocation entries apply. We assume that an
+ allocated reloc section uses the dynamic symbol table.
+ FIXME: How can we be sure? */
+ s = bfd_get_section_by_name (abfd, ".dynsym");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+
+ /* We look up the section the relocs apply to by name. */
+ name = sec->name;
+ if (d->this_hdr.sh_type == SHT_REL)
+ name += 4;
+ else
+ name += 5;
+ s = bfd_get_section_by_name (abfd, name);
+ if (s != NULL)
+ d->this_hdr.sh_info = elf_section_data (s)->this_idx;
+ break;
+
+ case SHT_STRTAB:
+ /* We assume that a section named .stab*str is a stabs
+ string section. We look for a section with the same name
+ but without the trailing ``str'', and set its sh_link
+ field to point to this section. */
+ if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
+ && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
+ {
+ size_t len;
+ char *alc;
+
+ len = strlen (sec->name);
+ alc = (char *) malloc (len - 2);
+ if (alc == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ strncpy (alc, sec->name, len - 3);
+ alc[len - 3] = '\0';
+ s = bfd_get_section_by_name (abfd, alc);
+ free (alc);
+ if (s != NULL)
+ {
+ elf_section_data (s)->this_hdr.sh_link = d->this_idx;
+
+ /* This is a .stab section. */
+ elf_section_data (s)->this_hdr.sh_entsize =
+ 4 + 2 * (bed->s->arch_size / 8);
+ }
+ }
+ break;
+
+ case SHT_DYNAMIC:
+ case SHT_DYNSYM:
+ /* sh_link is the section header index of the string table
+ used for the dynamic entries or symbol table. */
+ s = bfd_get_section_by_name (abfd, ".dynstr");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+ break;
+
+ case SHT_HASH:
+ /* sh_link is the section header index of the symbol table
+ this hash table is for. */
+ s = bfd_get_section_by_name (abfd, ".dynsym");
+ if (s != NULL)
+ d->this_hdr.sh_link = elf_section_data (s)->this_idx;
+ break;
+ }
+ }
+
+ return true;
+}
+
+/* Map symbol from it's internal number to the external number, moving
+ all local symbols to be at the head of the list. */
+
+static INLINE int
+sym_is_global (abfd, sym)
+ bfd *abfd;
+ asymbol *sym;
+{
+ /* If the backend has a special mapping, use it. */
+ if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
+ (abfd, sym));
+
+ return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
+ || bfd_is_und_section (bfd_get_section (sym))
+ || bfd_is_com_section (bfd_get_section (sym)));
+}
+
+static boolean
+elf_map_symbols (abfd)
+ bfd *abfd;
+{
+ int symcount = bfd_get_symcount (abfd);
+ asymbol **syms = bfd_get_outsymbols (abfd);
+ asymbol **sect_syms;
+ int num_locals = 0;
+ int num_globals = 0;
+ int num_locals2 = 0;
+ int num_globals2 = 0;
+ int max_index = 0;
+ int num_sections = 0;
+ int idx;
+ asection *asect;
+ asymbol **new_syms;
+
+#ifdef DEBUG
+ fprintf (stderr, "elf_map_symbols\n");
+ fflush (stderr);
+#endif
+
+ /* Add a section symbol for each BFD section. FIXME: Is this really
+ necessary? */
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (max_index < asect->index)
+ max_index = asect->index;
+ }
+
+ max_index++;
+ sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
+ if (sect_syms == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ elf_section_syms (abfd) = sect_syms;
+
+ for (idx = 0; idx < symcount; idx++)
+ {
+ if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
+ && syms[idx]->value == 0)
+ {
+ asection *sec;
+
+ sec = syms[idx]->section;
+ if (sec->owner != NULL)
+ {
+ if (sec->owner != abfd)
+ {
+ if (sec->output_offset != 0)
+ continue;
+ sec = sec->output_section;
+ BFD_ASSERT (sec->owner == abfd);
+ }
+ sect_syms[sec->index] = syms[idx];
+ }
+ }
+ }
+
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ asymbol *sym;
+
+ if (sect_syms[asect->index] != NULL)
+ continue;
+
+ sym = bfd_make_empty_symbol (abfd);
+ if (sym == NULL)
+ return false;
+ sym->the_bfd = abfd;
+ sym->name = asect->name;
+ sym->value = 0;
+ /* Set the flags to 0 to indicate that this one was newly added. */
+ sym->flags = 0;
+ sym->section = asect;
+ sect_syms[asect->index] = sym;
+ num_sections++;
+#ifdef DEBUG
+ fprintf (stderr,
+ "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
+ asect->name, (long) asect->vma, asect->index, (long) asect);
+#endif
+ }
+
+ /* Classify all of the symbols. */
+ for (idx = 0; idx < symcount; idx++)
+ {
+ if (!sym_is_global (abfd, syms[idx]))
+ num_locals++;
+ else
+ num_globals++;
+ }
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (sect_syms[asect->index] != NULL
+ && sect_syms[asect->index]->flags == 0)
+ {
+ sect_syms[asect->index]->flags = BSF_SECTION_SYM;
+ if (!sym_is_global (abfd, sect_syms[asect->index]))
+ num_locals++;
+ else
+ num_globals++;
+ sect_syms[asect->index]->flags = 0;
+ }
+ }
+
+ /* Now sort the symbols so the local symbols are first. */
+ new_syms = ((asymbol **)
+ bfd_alloc (abfd,
+ (num_locals + num_globals) * sizeof (asymbol *)));
+ if (new_syms == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ for (idx = 0; idx < symcount; idx++)
+ {
+ asymbol *sym = syms[idx];
+ int i;
+
+ if (!sym_is_global (abfd, sym))
+ i = num_locals2++;
+ else
+ i = num_locals + num_globals2++;
+ new_syms[i] = sym;
+ sym->udata.i = i + 1;
+ }
+ for (asect = abfd->sections; asect; asect = asect->next)
+ {
+ if (sect_syms[asect->index] != NULL
+ && sect_syms[asect->index]->flags == 0)
+ {
+ asymbol *sym = sect_syms[asect->index];
+ int i;
+
+ sym->flags = BSF_SECTION_SYM;
+ if (!sym_is_global (abfd, sym))
+ i = num_locals2++;
+ else
+ i = num_locals + num_globals2++;
+ new_syms[i] = sym;
+ sym->udata.i = i + 1;
+ }
+ }
+
+ bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
+
+ elf_num_locals (abfd) = num_locals;
+ elf_num_globals (abfd) = num_globals;
+ return true;
+}
+
+/* Compute the file positions we are going to put the sections at, and
+ otherwise prepare to begin writing out the ELF file. If LINK_INFO
+ is not NULL, this is being called by the ELF backend linker. */
+
+boolean
+_bfd_elf_compute_section_file_positions (abfd, link_info)
+ bfd *abfd;
+ struct bfd_link_info *link_info;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ boolean failed;
+ struct bfd_strtab_hash *strtab;
+ Elf_Internal_Shdr *shstrtab_hdr;
+
+ if (abfd->output_has_begun)
+ return true;
+
+ /* Do any elf backend specific processing first. */
+ if (bed->elf_backend_begin_write_processing)
+ (*bed->elf_backend_begin_write_processing) (abfd, link_info);
+
+ if (! prep_headers (abfd))
+ return false;
+
+ failed = false;
+ bfd_map_over_sections (abfd, elf_fake_sections, &failed);
+ if (failed)
+ return false;
+
+ if (!assign_section_numbers (abfd))
+ return false;
+
+ /* The backend linker builds symbol table information itself. */
+ if (link_info == NULL)
+ {
+ if (! swap_out_syms (abfd, &strtab))
+ return false;
+ }
+
+ shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
+ /* sh_name was set in prep_headers. */
+ shstrtab_hdr->sh_type = SHT_STRTAB;
+ shstrtab_hdr->sh_flags = 0;
+ shstrtab_hdr->sh_addr = 0;
+ shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
+ shstrtab_hdr->sh_entsize = 0;
+ shstrtab_hdr->sh_link = 0;
+ shstrtab_hdr->sh_info = 0;
+ /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */
+ shstrtab_hdr->sh_addralign = 1;
+
+ if (!assign_file_positions_except_relocs (abfd,
+ link_info == NULL ? true : false))
+ return false;
+
+ if (link_info == NULL)
+ {
+ /* Now that we know where the .strtab section goes, write it
+ out. */
+ if ((bfd_seek (abfd, elf_tdata (abfd)->strtab_hdr.sh_offset, SEEK_SET)
+ != 0)
+ || ! _bfd_stringtab_emit (abfd, strtab))
+ return false;
+ _bfd_stringtab_free (strtab);
+ }
+
+ abfd->output_has_begun = true;
+
+ return true;
+}
+
+
+/* Align to the maximum file alignment that could be required for any
+ ELF data structure. */
+
+static INLINE file_ptr align_file_position PARAMS ((file_ptr, int));
+static INLINE file_ptr
+align_file_position (off, align)
+ file_ptr off;
+ int align;
+{
+ return (off + align - 1) & ~(align - 1);
+}
+
+/* Assign a file position to a section, optionally aligning to the
+ required section alignment. */
+
+INLINE file_ptr
+_bfd_elf_assign_file_position_for_section (i_shdrp, offset, align)
+ Elf_Internal_Shdr *i_shdrp;
+ file_ptr offset;
+ boolean align;
+{
+ if (align)
+ {
+ unsigned int al;
+
+ al = i_shdrp->sh_addralign;
+ if (al > 1)
+ offset = BFD_ALIGN (offset, al);
+ }
+ i_shdrp->sh_offset = offset;
+ if (i_shdrp->bfd_section != NULL)
+ i_shdrp->bfd_section->filepos = offset;
+ if (i_shdrp->sh_type != SHT_NOBITS)
+ offset += i_shdrp->sh_size;
+ return offset;
+}
+
+/* Get the size of the program header.
+
+ SORTED_HDRS, if non-NULL, is an array of COUNT pointers to headers sorted
+ by VMA. Non-allocated sections (!SHF_ALLOC) must appear last. All
+ section VMAs and sizes are known so we can compute the correct value.
+ (??? This may not be perfectly true. What cases do we miss?)
+
+ If SORTED_HDRS is NULL we assume there are two segments: text and data
+ (exclusive of .interp and .dynamic).
+
+ If this is called by the linker before any of the section VMA's are set, it
+ can't calculate the correct value for a strange memory layout. This only
+ happens when SIZEOF_HEADERS is used in a linker script. In this case,
+ SORTED_HDRS is NULL and we assume the normal scenario of one text and one
+ data segment (exclusive of .interp and .dynamic).
+
+ ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
+ will be two segments. */
+
+static bfd_size_type
+get_program_header_size (abfd, sorted_hdrs, count, maxpagesize)
+ bfd *abfd;
+ Elf_Internal_Shdr **sorted_hdrs;
+ unsigned int count;
+ bfd_vma maxpagesize;
+{
+ size_t segs;
+ asection *s;
+
+ /* We can't return a different result each time we're called. */
+ if (elf_tdata (abfd)->program_header_size != 0)
+ return elf_tdata (abfd)->program_header_size;
+
+ if (sorted_hdrs != NULL)
+ {
+ unsigned int i;
+ unsigned int last_type;
+ Elf_Internal_Shdr **hdrpp;
+ /* What we think the current segment's offset is. */
+ bfd_vma p_offset;
+ /* What we think the current segment's address is. */
+ bfd_vma p_vaddr;
+ /* How big we think the current segment is. */
+ bfd_vma p_memsz;
+ /* What we think the current file offset is. */
+ bfd_vma file_offset;
+ bfd_vma next_offset;
+
+ /* Scan the headers and compute the number of segments required. This
+ code is intentionally similar to the code in map_program_segments.
+
+ The `sh_offset' field isn't valid at this point, so we keep our own
+ running total in `file_offset'.
+
+ This works because section VMAs are already known. */
+
+ segs = 1;
+ /* Make sure the first section goes in the first segment. */
+ file_offset = p_offset = sorted_hdrs[0]->sh_addr % maxpagesize;
+ p_vaddr = sorted_hdrs[0]->sh_addr;
+ p_memsz = 0;
+ last_type = SHT_PROGBITS;
+
+ for (i = 0, hdrpp = sorted_hdrs; i < count; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+
+ /* Ignore any section which will not be part of the process
+ image. */
+ if ((hdr->sh_flags & SHF_ALLOC) == 0)
+ continue;
+
+ /* Keep track of where this and the next sections go.
+ The section VMA must equal the file position modulo
+ the page size. */
+ file_offset += (hdr->sh_addr - file_offset) % maxpagesize;
+ next_offset = file_offset;
+ if (hdr->sh_type != SHT_NOBITS)
+ next_offset = file_offset + hdr->sh_size;
+
+ /* If this section fits in the segment we are constructing, add
+ it in. */
+ if ((file_offset - (p_offset + p_memsz)
+ == hdr->sh_addr - (p_vaddr + p_memsz))
+ && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
+ {
+ bfd_size_type adjust;
+
+ adjust = hdr->sh_addr - (p_vaddr + p_memsz);
+ p_memsz += hdr->sh_size + adjust;
+ file_offset = next_offset;
+ last_type = hdr->sh_type;
+ continue;
+ }
+
+ /* The section won't fit, start a new segment. */
+ ++segs;
+
+ /* Initialize the segment. */
+ p_vaddr = hdr->sh_addr;
+ p_memsz = hdr->sh_size;
+ p_offset = file_offset;
+ file_offset = next_offset;
+
+ last_type = hdr->sh_type;
+ }
+ }
+ else
+ {
+ /* Assume we will need exactly two PT_LOAD segments: one for text
+ and one for data. */
+ segs = 2;
+ }
+
+ s = bfd_get_section_by_name (abfd, ".interp");
+ if (s != NULL && (s->flags & SEC_LOAD) != 0)
+ {
+ /* If we have a loadable interpreter section, we need a
+ PT_INTERP segment. In this case, assume we also need a
+ PT_PHDR segment, although that may not be true for all
+ targets. */
+ segs += 2;
+ }
+
+ if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
+ {
+ /* We need a PT_DYNAMIC segment. */
+ ++segs;
+ }
+
+ elf_tdata (abfd)->program_header_size = segs * get_elf_backend_data (abfd)->s->sizeof_phdr;
+ return elf_tdata (abfd)->program_header_size;
+}
+
+/* Create the program header. OFF is the file offset where the
+ program header should be written. FIRST is the first loadable ELF
+ section. SORTED_HDRS is the ELF sections sorted by section
+ address. PHDR_SIZE is the size of the program header as returned
+ by get_program_header_size. */
+
+static file_ptr
+map_program_segments (abfd, off, first, sorted_hdrs, phdr_size)
+ bfd *abfd;
+ file_ptr off;
+ Elf_Internal_Shdr *first;
+ Elf_Internal_Shdr **sorted_hdrs;
+ bfd_size_type phdr_size;
+{
+ Elf_Internal_Phdr phdrs[10];
+ unsigned int phdr_count;
+ Elf_Internal_Phdr *phdr;
+ int phdr_size_adjust;
+ unsigned int i;
+ Elf_Internal_Shdr **hdrpp;
+ asection *sinterp, *sdyn;
+ unsigned int last_type;
+ Elf_Internal_Ehdr *i_ehdrp;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ BFD_ASSERT ((abfd->flags & (EXEC_P | DYNAMIC)) != 0);
+ BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr)
+ <= sizeof phdrs / sizeof (phdrs[0]));
+
+ phdr_count = 0;
+ phdr = phdrs;
+
+ phdr_size_adjust = 0;
+
+ /* If we have a loadable .interp section, we must create a PT_INTERP
+ segment which must precede all PT_LOAD segments. We assume that
+ we must also create a PT_PHDR segment, although that may not be
+ true for all targets. */
+ sinterp = bfd_get_section_by_name (abfd, ".interp");
+ if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0)
+ {
+ BFD_ASSERT (first != NULL);
+
+ phdr->p_type = PT_PHDR;
+
+ phdr->p_offset = off;
+
+ /* Account for any adjustment made because of the alignment of
+ the first loadable section. */
+ phdr_size_adjust = (first->sh_offset - phdr_size) - off;
+ BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128);
+
+ /* The program header precedes all loadable sections. This lets
+ us compute its loadable address. This depends on the linker
+ script. */
+ phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust);
+
+ phdr->p_paddr = 0;
+ phdr->p_filesz = phdr_size;
+ phdr->p_memsz = phdr_size;
+
+ /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
+ phdr->p_flags = PF_R | PF_X;
+
+ phdr->p_align = bed->s->file_align;
+ BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % bed->s->file_align == 0);
+
+ /* Include the ELF header in the first loadable segment. */
+ phdr_size_adjust += off;
+
+ ++phdr_count;
+ ++phdr;
+
+ phdr->p_type = PT_INTERP;
+ phdr->p_offset = sinterp->filepos;
+ phdr->p_vaddr = sinterp->vma;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = sinterp->_raw_size;
+ phdr->p_memsz = sinterp->_raw_size;
+ phdr->p_flags = PF_R;
+ phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp);
+
+ ++phdr_count;
+ ++phdr;
+ }
+
+ /* Look through the sections to see how they will be divided into
+ program segments. The sections must be arranged in order by
+ sh_addr for this to work correctly. */
+ phdr->p_type = PT_NULL;
+ last_type = SHT_PROGBITS;
+ for (i = 1, hdrpp = sorted_hdrs;
+ i < elf_elfheader (abfd)->e_shnum;
+ i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+
+ /* Ignore any section which will not be part of the process
+ image. */
+ if ((hdr->sh_flags & SHF_ALLOC) == 0)
+ continue;
+
+ /* If this section fits in the segment we are constructing, add
+ it in. */
+ if (phdr->p_type != PT_NULL
+ && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz)
+ == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz))
+ && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
+ {
+ bfd_size_type adjust;
+
+ adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz);
+ phdr->p_memsz += hdr->sh_size + adjust;
+ if (hdr->sh_type != SHT_NOBITS)
+ phdr->p_filesz += hdr->sh_size + adjust;
+ if ((hdr->sh_flags & SHF_WRITE) != 0)
+ phdr->p_flags |= PF_W;
+ if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
+ phdr->p_flags |= PF_X;
+ last_type = hdr->sh_type;
+ continue;
+ }
+
+ /* The section won't fit, start a new segment. If we're already in one,
+ move to the next one. */
+ if (phdr->p_type != PT_NULL)
+ {
+ ++phdr;
+ ++phdr_count;
+ }
+
+ /* Initialize the segment. */
+ phdr->p_type = PT_LOAD;
+ phdr->p_offset = hdr->sh_offset;
+ phdr->p_vaddr = hdr->sh_addr;
+ phdr->p_paddr = 0;
+ if (hdr->sh_type == SHT_NOBITS)
+ phdr->p_filesz = 0;
+ else
+ phdr->p_filesz = hdr->sh_size;
+ phdr->p_memsz = hdr->sh_size;
+ phdr->p_flags = PF_R;
+ if ((hdr->sh_flags & SHF_WRITE) != 0)
+ phdr->p_flags |= PF_W;
+ if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
+ phdr->p_flags |= PF_X;
+ phdr->p_align = bed->maxpagesize;
+
+ if (hdr == first
+ && sinterp != NULL
+ && (sinterp->flags & SEC_LOAD) != 0)
+ {
+ phdr->p_offset -= phdr_size + phdr_size_adjust;
+ phdr->p_vaddr -= phdr_size + phdr_size_adjust;
+ phdr->p_filesz += phdr_size + phdr_size_adjust;
+ phdr->p_memsz += phdr_size + phdr_size_adjust;
+ }
+
+ last_type = hdr->sh_type;
+ }
+
+ if (phdr->p_type != PT_NULL)
+ {
+ ++phdr;
+ ++phdr_count;
+ }
+
+ /* If we have a .dynamic section, create a PT_DYNAMIC segment. */
+ sdyn = bfd_get_section_by_name (abfd, ".dynamic");
+ if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0)
+ {
+ phdr->p_type = PT_DYNAMIC;
+ phdr->p_offset = sdyn->filepos;
+ phdr->p_vaddr = sdyn->vma;
+ phdr->p_paddr = 0;
+ phdr->p_filesz = sdyn->_raw_size;
+ phdr->p_memsz = sdyn->_raw_size;
+ phdr->p_flags = PF_R;
+ if ((sdyn->flags & SEC_READONLY) == 0)
+ phdr->p_flags |= PF_W;
+ if ((sdyn->flags & SEC_CODE) != 0)
+ phdr->p_flags |= PF_X;
+ phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn);
+
+ ++phdr;
+ ++phdr_count;
+ }
+
+ /* Make sure the return value from get_program_header_size matches
+ what we computed here. Actually, it's OK if we allocated too
+ much space in the program header. */
+ if (phdr_count > phdr_size / bed->s->sizeof_phdr)
+ {
+ ((*_bfd_error_handler)
+ ("%s: Not enough room for program headers (allocated %lu, need %u)",
+ bfd_get_filename (abfd),
+ (unsigned long) (phdr_size / bed->s->sizeof_phdr),
+ phdr_count));
+ bfd_set_error (bfd_error_bad_value);
+ return (file_ptr) -1;
+ }
+
+ /* Set up program header information. */
+ i_ehdrp = elf_elfheader (abfd);
+ i_ehdrp->e_phentsize = bed->s->sizeof_phdr;
+ i_ehdrp->e_phoff = off;
+ i_ehdrp->e_phnum = phdr_count;
+
+ /* Save the program headers away. I don't think anybody uses this
+ information right now. */
+ elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *)
+ bfd_alloc (abfd,
+ (phdr_count
+ * sizeof (Elf_Internal_Phdr))));
+ if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return (file_ptr) -1;
+ }
+ memcpy (elf_tdata (abfd)->phdr, phdrs,
+ phdr_count * sizeof (Elf_Internal_Phdr));
+
+ /* Write out the program headers. */
+ if (bfd_seek (abfd, off, SEEK_SET) != 0)
+ return (file_ptr) -1;
+
+ if (bed->s->write_out_phdrs (abfd, phdrs, phdr_count) != 0)
+ return (file_ptr) -1;
+
+ return off + phdr_count * bed->s->sizeof_phdr;
+}
+
+/* Work out the file positions of all the sections. This is called by
+ _bfd_elf_compute_section_file_positions. All the section sizes and
+ VMAs must be known before this is called.
+
+ We do not consider reloc sections at this point, unless they form
+ part of the loadable image. Reloc sections are assigned file
+ positions in assign_file_positions_for_relocs, which is called by
+ write_object_contents and final_link.
+
+ If DOSYMS is false, we do not assign file positions for the symbol
+ table or the string table. */
+
+static int elf_sort_hdrs PARAMS ((const PTR, const PTR));
+
+static boolean
+assign_file_positions_except_relocs (abfd, dosyms)
+ bfd *abfd;
+ boolean dosyms;
+{
+ struct elf_obj_tdata * const tdata = elf_tdata (abfd);
+ Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
+ Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
+ file_ptr off;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* Start after the ELF header. */
+ off = i_ehdrp->e_ehsize;
+
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ {
+ Elf_Internal_Shdr **hdrpp;
+ unsigned int i;
+
+ /* We are not creating an executable, which means that we are
+ not creating a program header, and that the actual order of
+ the sections in the file is unimportant. */
+ for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+ if (! dosyms
+ && (i == tdata->symtab_section
+ || i == tdata->strtab_section))
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, true);
+ }
+ }
+ else
+ {
+ file_ptr phdr_off;
+ bfd_size_type phdr_size;
+ bfd_vma maxpagesize;
+ size_t hdrppsize;
+ Elf_Internal_Shdr **sorted_hdrs;
+ Elf_Internal_Shdr **hdrpp;
+ unsigned int i;
+ Elf_Internal_Shdr *first;
+ file_ptr phdr_map;
+
+ /* We are creating an executable. */
+
+ maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
+ if (maxpagesize == 0)
+ maxpagesize = 1;
+
+ /* We must sort the sections. The GNU linker will always create
+ the sections in an appropriate order, but the Irix 5 linker
+ will not. We don't include the dummy first section in the
+ sort. We sort sections which are not SHF_ALLOC to the end. */
+ hdrppsize = (i_ehdrp->e_shnum - 1) * sizeof (Elf_Internal_Shdr *);
+ sorted_hdrs = (Elf_Internal_Shdr **) malloc (hdrppsize);
+ if (sorted_hdrs == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ memcpy (sorted_hdrs, i_shdrpp + 1, hdrppsize);
+ qsort (sorted_hdrs, i_ehdrp->e_shnum - 1, sizeof (Elf_Internal_Shdr *),
+ elf_sort_hdrs);
+
+ /* We can't actually create the program header until we have set the
+ file positions for the sections, and we can't do that until we know
+ how big the header is going to be. */
+ off = align_file_position (off, bed->s->file_align);
+ phdr_size = get_program_header_size (abfd,
+ sorted_hdrs, i_ehdrp->e_shnum - 1,
+ maxpagesize);
+ if (phdr_size == (file_ptr) -1)
+ return false;
+
+ /* Compute the file offsets of each section. */
+ phdr_off = off;
+ off += phdr_size;
+ first = NULL;
+ for (i = 1, hdrpp = sorted_hdrs; i < i_ehdrp->e_shnum; i++, hdrpp++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = *hdrpp;
+ if ((hdr->sh_flags & SHF_ALLOC) == 0)
+ {
+ if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+ if (! dosyms
+ && (hdr == i_shdrpp[tdata->symtab_section]
+ || hdr == i_shdrpp[tdata->strtab_section]))
+ {
+ hdr->sh_offset = -1;
+ continue;
+ }
+ }
+ else
+ {
+ if (first == NULL)
+ first = hdr;
+
+ /* The section VMA must equal the file position modulo
+ the page size. This is required by the program
+ header. */
+ off += (hdr->sh_addr - off) % maxpagesize;
+ }
+
+ off = _bfd_elf_assign_file_position_for_section (hdr, off, false);
+ }
+
+ /* Create the program header. */
+ phdr_map = map_program_segments (abfd, phdr_off, first, sorted_hdrs,
+ phdr_size);
+ if (phdr_map == (file_ptr) -1)
+ return false;
+ BFD_ASSERT ((bfd_size_type) phdr_map <= (bfd_size_type) phdr_off + phdr_size);
+
+ free (sorted_hdrs);
+ }
+
+ /* Place the section headers. */
+ off = align_file_position (off, bed->s->file_align);
+ i_ehdrp->e_shoff = off;
+ off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
+
+ elf_tdata (abfd)->next_file_pos = off;
+
+ return true;
+}
+
+/* Sort the ELF headers by VMA. We sort headers which are not
+ SHF_ALLOC to the end. */
+static int
+elf_sort_hdrs (arg1, arg2)
+ const PTR arg1;
+ const PTR arg2;
+{
+ int ret;
+ const Elf_Internal_Shdr *hdr1 = *(const Elf_Internal_Shdr **) arg1;
+ const Elf_Internal_Shdr *hdr2 = *(const Elf_Internal_Shdr **) arg2;
+
+#define TOEND(x) (((x)->sh_flags & SHF_ALLOC)==0)
+
+ if (TOEND (hdr1))
+ if (TOEND (hdr2))
+ return 0;
+ else
+ return 1;
+
+ if (TOEND (hdr2))
+ return -1;
+
+ if (hdr1->sh_addr < hdr2->sh_addr)
+ return -1;
+ else if (hdr1->sh_addr > hdr2->sh_addr)
+ return 1;
+
+ /* Put !SHT_NOBITS sections before SHT_NOBITS ones.
+ The main loop in map_program_segments requires this. */
+
+ ret = (hdr1->sh_type == SHT_NOBITS) - (hdr2->sh_type == SHT_NOBITS);
+
+ if (ret != 0)
+ return ret;
+ if (hdr1->sh_size < hdr2->sh_size)
+ return -1;
+ if (hdr1->sh_size > hdr2->sh_size)
+ return 1;
+ return 0;
+}
+
+static boolean
+prep_headers (abfd)
+ bfd *abfd;
+{
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ int count;
+ struct bfd_strtab_hash *shstrtab;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
+
+ shstrtab = _bfd_elf_stringtab_init ();
+ if (shstrtab == NULL)
+ return false;
+
+ elf_shstrtab (abfd) = shstrtab;
+
+ i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
+ i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
+ i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
+ i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
+
+ i_ehdrp->e_ident[EI_CLASS] = bed->s->elfclass;
+ i_ehdrp->e_ident[EI_DATA] =
+ abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
+ i_ehdrp->e_ident[EI_VERSION] = bed->s->ev_current;
+
+ for (count = EI_PAD; count < EI_NIDENT; count++)
+ i_ehdrp->e_ident[count] = 0;
+
+ if ((abfd->flags & DYNAMIC) != 0)
+ i_ehdrp->e_type = ET_DYN;
+ else if ((abfd->flags & EXEC_P) != 0)
+ i_ehdrp->e_type = ET_EXEC;
+ else
+ i_ehdrp->e_type = ET_REL;
+
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_unknown:
+ i_ehdrp->e_machine = EM_NONE;
+ break;
+ case bfd_arch_sparc:
+ if (bed->s->arch_size == 64)
+ i_ehdrp->e_machine = EM_SPARC64;
+ else
+ i_ehdrp->e_machine = EM_SPARC;
+ break;
+ case bfd_arch_i386:
+ i_ehdrp->e_machine = EM_386;
+ break;
+ case bfd_arch_m68k:
+ i_ehdrp->e_machine = EM_68K;
+ break;
+ case bfd_arch_m88k:
+ i_ehdrp->e_machine = EM_88K;
+ break;
+ case bfd_arch_i860:
+ i_ehdrp->e_machine = EM_860;
+ break;
+ case bfd_arch_mips: /* MIPS Rxxxx */
+ i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
+ break;
+ case bfd_arch_hppa:
+ i_ehdrp->e_machine = EM_PARISC;
+ break;
+ case bfd_arch_powerpc:
+ i_ehdrp->e_machine = EM_PPC;
+ break;
+/* start-sanitize-arc */
+ case bfd_arch_arc:
+ i_ehdrp->e_machine = EM_CYGNUS_ARC;
+ break;
+/* end-sanitize-arc */
+ /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
+ default:
+ i_ehdrp->e_machine = EM_NONE;
+ }
+ i_ehdrp->e_version = bed->s->ev_current;
+ i_ehdrp->e_ehsize = bed->s->sizeof_ehdr;
+
+ /* no program header, for now. */
+ i_ehdrp->e_phoff = 0;
+ i_ehdrp->e_phentsize = 0;
+ i_ehdrp->e_phnum = 0;
+
+ /* each bfd section is section header entry */
+ i_ehdrp->e_entry = bfd_get_start_address (abfd);
+ i_ehdrp->e_shentsize = bed->s->sizeof_shdr;
+
+ /* if we're building an executable, we'll need a program header table */
+ if (abfd->flags & EXEC_P)
+ {
+ /* it all happens later */
+#if 0
+ i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
+
+ /* elf_build_phdrs() returns a (NULL-terminated) array of
+ Elf_Internal_Phdrs */
+ i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
+ i_ehdrp->e_phoff = outbase;
+ outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
+#endif
+ }
+ else
+ {
+ i_ehdrp->e_phentsize = 0;
+ i_phdrp = 0;
+ i_ehdrp->e_phoff = 0;
+ }
+
+ elf_tdata (abfd)->symtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
+ elf_tdata (abfd)->strtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
+ elf_tdata (abfd)->shstrtab_hdr.sh_name =
+ (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
+ if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
+ || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
+ return false;
+
+ return true;
+}
+
+/* Assign file positions for all the reloc sections which are not part
+ of the loadable file image. */
+
+void
+_bfd_elf_assign_file_positions_for_relocs (abfd)
+ bfd *abfd;
+{
+ file_ptr off;
+ unsigned int i;
+ Elf_Internal_Shdr **shdrpp;
+
+ off = elf_tdata (abfd)->next_file_pos;
+
+ for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
+ i < elf_elfheader (abfd)->e_shnum;
+ i++, shdrpp++)
+ {
+ Elf_Internal_Shdr *shdrp;
+
+ shdrp = *shdrpp;
+ if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
+ && shdrp->sh_offset == -1)
+ off = _bfd_elf_assign_file_position_for_section (shdrp, off, true);
+ }
+
+ elf_tdata (abfd)->next_file_pos = off;
+}
+
+boolean
+_bfd_elf_write_object_contents (abfd)
+ bfd *abfd;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Ehdr *i_ehdrp;
+ Elf_Internal_Shdr **i_shdrp;
+ boolean failed;
+ unsigned int count;
+
+ if (! abfd->output_has_begun
+ && ! _bfd_elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
+
+ i_shdrp = elf_elfsections (abfd);
+ i_ehdrp = elf_elfheader (abfd);
+
+ failed = false;
+ bfd_map_over_sections (abfd, bed->s->write_relocs, &failed);
+ if (failed)
+ return false;
+ _bfd_elf_assign_file_positions_for_relocs (abfd);
+
+ /* After writing the headers, we need to write the sections too... */
+ for (count = 1; count < i_ehdrp->e_shnum; count++)
+ {
+ if (bed->elf_backend_section_processing)
+ (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
+ if (i_shdrp[count]->contents)
+ {
+ if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
+ || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
+ 1, abfd)
+ != i_shdrp[count]->sh_size))
+ return false;
+ }
+ }
+
+ /* Write out the section header names. */
+ if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
+ return false;
+
+ if (bed->elf_backend_final_write_processing)
+ (*bed->elf_backend_final_write_processing) (abfd,
+ elf_tdata (abfd)->linker);
+
+ return bed->s->write_shdrs_and_ehdr (abfd);
+}
+
+/* given a section, search the header to find them... */
+int
+_bfd_elf_section_from_bfd_section (abfd, asect)
+ bfd *abfd;
+ struct sec *asect;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
+ int index;
+ Elf_Internal_Shdr *hdr;
+ int maxindex = elf_elfheader (abfd)->e_shnum;
+
+ for (index = 0; index < maxindex; index++)
+ {
+ hdr = i_shdrp[index];
+ if (hdr->bfd_section == asect)
+ return index;
+ }
+
+ if (bed->elf_backend_section_from_bfd_section)
+ {
+ for (index = 0; index < maxindex; index++)
+ {
+ int retval;
+
+ hdr = i_shdrp[index];
+ retval = index;
+ if ((*bed->elf_backend_section_from_bfd_section)
+ (abfd, hdr, asect, &retval))
+ return retval;
+ }
+ }
+
+ if (bfd_is_abs_section (asect))
+ return SHN_ABS;
+ if (bfd_is_com_section (asect))
+ return SHN_COMMON;
+ if (bfd_is_und_section (asect))
+ return SHN_UNDEF;
+
+ return -1;
+}
+
+/* given a symbol, return the bfd index for that symbol. */
+ int
+_bfd_elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
+ bfd *abfd;
+ struct symbol_cache_entry **asym_ptr_ptr;
+{
+ struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr;
+ int idx;
+ flagword flags = asym_ptr->flags;
+
+ /* When gas creates relocations against local labels, it creates its
+ own symbol for the section, but does put the symbol into the
+ symbol chain, so udata is 0. When the linker is generating
+ relocatable output, this section symbol may be for one of the
+ input sections rather than the output section. */
+ if (asym_ptr->udata.i == 0
+ && (flags & BSF_SECTION_SYM)
+ && asym_ptr->section)
+ {
+ int indx;
+
+ if (asym_ptr->section->output_section != NULL)
+ indx = asym_ptr->section->output_section->index;
+ else
+ indx = asym_ptr->section->index;
+ if (elf_section_syms (abfd)[indx])
+ asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
+ }
+
+ idx = asym_ptr->udata.i;
+ BFD_ASSERT (idx != 0);
+
+#if DEBUG & 4
+ {
+ fprintf (stderr,
+ "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
+ (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags));
+ fflush (stderr);
+ }
+#endif
+
+ return idx;
+}
+
+static boolean
+swap_out_syms (abfd, sttp)
+ bfd *abfd;
+ struct bfd_strtab_hash **sttp;
+{
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ if (!elf_map_symbols (abfd))
+ return false;
+
+ /* Dump out the symtabs. */
+ {
+ int symcount = bfd_get_symcount (abfd);
+ asymbol **syms = bfd_get_outsymbols (abfd);
+ struct bfd_strtab_hash *stt;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ char *outbound_syms;
+ int idx;
+
+ stt = _bfd_elf_stringtab_init ();
+ if (stt == NULL)
+ return false;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_entsize = bed->s->sizeof_sym;
+ symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
+ symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
+ symtab_hdr->sh_addralign = bed->s->file_align;
+
+ symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ outbound_syms = bfd_alloc (abfd,
+ (1 + symcount) * bed->s->sizeof_sym);
+ if (outbound_syms == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ symtab_hdr->contents = (PTR) outbound_syms;
+
+ /* now generate the data (for "contents") */
+ {
+ /* Fill in zeroth symbol and swap it out. */
+ Elf_Internal_Sym sym;
+ sym.st_name = 0;
+ sym.st_value = 0;
+ sym.st_size = 0;
+ sym.st_info = 0;
+ sym.st_other = 0;
+ sym.st_shndx = SHN_UNDEF;
+ bed->s->swap_symbol_out (abfd, &sym, outbound_syms);
+ outbound_syms += bed->s->sizeof_sym;
+ }
+ for (idx = 0; idx < symcount; idx++)
+ {
+ Elf_Internal_Sym sym;
+ bfd_vma value = syms[idx]->value;
+ elf_symbol_type *type_ptr;
+ flagword flags = syms[idx]->flags;
+
+ if (flags & BSF_SECTION_SYM)
+ /* Section symbols have no names. */
+ sym.st_name = 0;
+ else
+ {
+ sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
+ syms[idx]->name,
+ true, false);
+ if (sym.st_name == (unsigned long) -1)
+ return false;
+ }
+
+ type_ptr = elf_symbol_from (abfd, syms[idx]);
+
+ if (bfd_is_com_section (syms[idx]->section))
+ {
+ /* ELF common symbols put the alignment into the `value' field,
+ and the size into the `size' field. This is backwards from
+ how BFD handles it, so reverse it here. */
+ sym.st_size = value;
+ if (type_ptr == NULL
+ || type_ptr->internal_elf_sym.st_value == 0)
+ sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
+ else
+ sym.st_value = type_ptr->internal_elf_sym.st_value;
+ sym.st_shndx = _bfd_elf_section_from_bfd_section (abfd,
+ syms[idx]->section);
+ }
+ else
+ {
+ asection *sec = syms[idx]->section;
+ int shndx;
+
+ if (sec->output_section)
+ {
+ value += sec->output_offset;
+ sec = sec->output_section;
+ }
+ value += sec->vma;
+ sym.st_value = value;
+ sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
+ sym.st_shndx = shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+ if (shndx == -1)
+ {
+ asection *sec2;
+ /* Writing this would be a hell of a lot easier if we had
+ some decent documentation on bfd, and knew what to expect
+ of the library, and what to demand of applications. For
+ example, it appears that `objcopy' might not set the
+ section of a symbol to be a section that is actually in
+ the output file. */
+ sec2 = bfd_get_section_by_name (abfd, sec->name);
+ BFD_ASSERT (sec2 != 0);
+ sym.st_shndx = shndx = _bfd_elf_section_from_bfd_section (abfd, sec2);
+ BFD_ASSERT (shndx != -1);
+ }
+ }
+
+ if (bfd_is_com_section (syms[idx]->section))
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
+ else if (bfd_is_und_section (syms[idx]->section))
+ sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
+ ? STB_WEAK
+ : STB_GLOBAL),
+ ((flags & BSF_FUNCTION)
+ ? STT_FUNC
+ : STT_NOTYPE));
+ else if (flags & BSF_SECTION_SYM)
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ else if (flags & BSF_FILE)
+ sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
+ else
+ {
+ int bind = STB_LOCAL;
+ int type = STT_OBJECT;
+
+ if (flags & BSF_LOCAL)
+ bind = STB_LOCAL;
+ else if (flags & BSF_WEAK)
+ bind = STB_WEAK;
+ else if (flags & BSF_GLOBAL)
+ bind = STB_GLOBAL;
+
+ if (flags & BSF_FUNCTION)
+ type = STT_FUNC;
+
+ sym.st_info = ELF_ST_INFO (bind, type);
+ }
+
+ sym.st_other = 0;
+ bed->s->swap_symbol_out (abfd, &sym, outbound_syms);
+ outbound_syms += bed->s->sizeof_sym;
+ }
+
+ *sttp = stt;
+ symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ symstrtab_hdr->sh_addralign = 1;
+ }
+
+ return true;
+}
+
+/* Return the number of bytes required to hold the symtab vector.
+
+ Note that we base it on the count plus 1, since we will null terminate
+ the vector allocated based on this size. However, the ELF symbol table
+ always has a dummy entry as symbol #0, so it ends up even. */
+
+long
+_bfd_elf_get_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
+
+ return symtab_size;
+}
+
+long
+_bfd_elf_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ long symcount;
+ long symtab_size;
+ Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+
+ if (elf_dynsymtab (abfd) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ symcount = hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+ symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
+
+ return symtab_size;
+}
+
+long
+_bfd_elf_get_reloc_upper_bound (abfd, asect)
+ bfd *abfd;
+ sec_ptr asect;
+{
+ return (asect->reloc_count + 1) * sizeof (arelent *);
+}
+
+/* Canonicalize the relocs. */
+
+long
+_bfd_elf_canonicalize_reloc (abfd, section, relptr, symbols)
+ bfd *abfd;
+ sec_ptr section;
+ arelent **relptr;
+ asymbol **symbols;
+{
+ arelent *tblptr;
+ unsigned int i;
+
+ if (! get_elf_backend_data (abfd)->s->slurp_reloc_table (abfd, section, symbols))
+ return -1;
+
+ tblptr = section->relocation;
+ for (i = 0; i < section->reloc_count; i++)
+ *relptr++ = tblptr++;
+
+ *relptr = NULL;
+
+ return section->reloc_count;
+}
+
+long
+_bfd_elf_get_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
+{
+ long symcount = get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, false);
+
+ if (symcount >= 0)
+ bfd_get_symcount (abfd) = symcount;
+ return symcount;
+}
+
+long
+_bfd_elf_canonicalize_dynamic_symtab (abfd, alocation)
+ bfd *abfd;
+ asymbol **alocation;
+{
+ return get_elf_backend_data (abfd)->s->slurp_symbol_table (abfd, alocation, true);
+}
+
+asymbol *
+_bfd_elf_make_empty_symbol (abfd)
+ bfd *abfd;
+{
+ elf_symbol_type *newsym;
+
+ newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
+ if (!newsym)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ else
+ {
+ newsym->symbol.the_bfd = abfd;
+ return &newsym->symbol;
+ }
+}
+
+void
+_bfd_elf_get_symbol_info (ignore_abfd, symbol, ret)
+ bfd *ignore_abfd;
+ asymbol *symbol;
+ symbol_info *ret;
+{
+ bfd_symbol_info (symbol, ret);
+}
+
+alent *
+_bfd_elf_get_lineno (ignore_abfd, symbol)
+ bfd *ignore_abfd;
+ asymbol *symbol;
+{
+ fprintf (stderr, "elf_get_lineno unimplemented\n");
+ fflush (stderr);
+ BFD_FAIL ();
+ return NULL;
+}
+
+boolean
+_bfd_elf_set_arch_mach (abfd, arch, machine)
+ bfd *abfd;
+ enum bfd_architecture arch;
+ unsigned long machine;
+{
+ /* If this isn't the right architecture for this backend, and this
+ isn't the generic backend, fail. */
+ if (arch != get_elf_backend_data (abfd)->arch
+ && arch != bfd_arch_unknown
+ && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
+ return false;
+
+ return bfd_default_set_arch_mach (abfd, arch, machine);
+}
+
+boolean
+_bfd_elf_find_nearest_line (abfd,
+ section,
+ symbols,
+ offset,
+ filename_ptr,
+ functionname_ptr,
+ line_ptr)
+ bfd *abfd;
+ asection *section;
+ asymbol **symbols;
+ bfd_vma offset;
+ CONST char **filename_ptr;
+ CONST char **functionname_ptr;
+ unsigned int *line_ptr;
+{
+ return false;
+}
+
+int
+_bfd_elf_sizeof_headers (abfd, reloc)
+ bfd *abfd;
+ boolean reloc;
+{
+ int ret;
+
+ ret = get_elf_backend_data (abfd)->s->sizeof_ehdr;
+ if (! reloc)
+ ret += get_program_header_size (abfd, (Elf_Internal_Shdr **) NULL, 0,
+ (bfd_vma) 0);
+ return ret;
+}
+
+boolean
+_bfd_elf_set_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
+{
+ Elf_Internal_Shdr *hdr;
+
+ if (! abfd->output_has_begun
+ && ! _bfd_elf_compute_section_file_positions (abfd,
+ (struct bfd_link_info *) NULL))
+ return false;
+
+ hdr = &elf_section_data (section)->this_hdr;
+
+ if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
+ return false;
+ if (bfd_write (location, 1, count, abfd) != count)
+ return false;
+
+ return true;
+}
+
+void
+_bfd_elf_no_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rela *dst;
+{
+ fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n");
+ fflush (stderr);
+ BFD_FAIL ();
+}
+
+#if 0
+void
+_bfd_elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf_Internal_Rel *dst;
+{
+ fprintf (stderr, "elf REL relocation support for target machine unimplemented\n");
+ fflush (stderr);
+ BFD_FAIL ();
+}
+#endif
--- /dev/null
+/* Generic support for 32-bit ELF
+ Copyright 1993 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "libelf.h"
+
+/* This does not include any relocations, but should be good enough
+ for GDB to read the file. */
+
+#define TARGET_LITTLE_SYM bfd_elf32_little_generic_vec
+#define TARGET_LITTLE_NAME "elf32-little"
+#define TARGET_BIG_SYM bfd_elf32_big_generic_vec
+#define TARGET_BIG_NAME "elf32-big"
+#define ELF_ARCH bfd_arch_unknown
+#define ELF_MACHINE_CODE EM_NONE
+#define bfd_elf32_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
+#define elf_info_to_howto _bfd_elf_no_info_to_howto
+
+#include "elf32-target.h"
sym_name = h->root.root.string;
else
{
- sym_name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ sym_name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (sym_name == NULL)
return false;
if (*sym_name == '\0')
if (!strcmp (section->name, ".PARISC.symextn") && !symext_chain_size)
return true;
else
- return bfd_elf32_set_section_contents (abfd, section, location,
- offset, count);
+ return _bfd_elf_set_section_contents (abfd, section, location,
+ offset, count);
}
/* Translate from an elf into field into a howto relocation pointer. */
hdr = elf_elfsections (input_bfd)[local_syms[current_index].st_shndx];
sym_sec = hdr->bfd_section;
- sym_name = elf_string_from_elf_section (input_bfd,
+ sym_name = bfd_elf_string_from_elf_section (input_bfd,
symtab_hdr->sh_link,
local_syms[current_index].st_name);
len = strlen (sym_name) + 10;
struct bfd_link_info *link_info;
{
bfd *input_bfd;
- asection *section, *stub_sec;
+ asection *section, *stub_sec = 0;
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *local_syms, *isym, **all_local_syms;
Elf32_External_Sym *ext_syms, *esym;
sym = local_syms + r_index;
hdr = elf_elfsections (input_bfd)[sym->st_shndx];
sym_sec = hdr->bfd_section;
- sym_name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ sym_name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
sym_value = (ELF_ST_TYPE (sym->st_info) == STT_SECTION
? 0 : sym->st_value);
destination = (sym_value
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static void elf_i386_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
-static boolean elf_i386_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_i386_create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
-/* Create dynamic sections when linking against a dynamic object. */
-
-static boolean
-elf_i386_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
-
- /* We need to create .plt, .rel.plt, .got, .got.plt, .dynbss, and
- .rel.bss sections. */
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".rel.plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- if (! elf_i386_create_got_section (abfd, info))
- return false;
-
- /* The .dynbss section is a place to put symbols which are defined
- by dynamic objects, are referenced by regular objects, and are
- not functions. We must allocate space for them in the process
- image and use a R_386_COPY reloc to tell the dynamic linker to
- initialize them at run time. The linker script puts the .dynbss
- section into the .bss section of the final image. */
- s = bfd_make_section (abfd, ".dynbss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
- return false;
-
- /* The .rel.bss section holds copy relocs. This section is not
- normally needed. We need to create it here, though, so that the
- linker will map it to an output section. We can't just create it
- only if we need it, because we will not know whether we need it
- until we have seen all the input files, and the first time the
- main linker code calls BFD after examining all the input files
- (size_dynamic_sections) the input sections have already been
- mapped to the output sections. If the section turns out not to
- be needed, we can discard it later. We will never need this
- section when generating a shared object, since they do not use
- copy relocs. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".rel.bss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
- }
-
- return true;
-}
-
-/* Create the .got section to hold the global offset table, and the
- .got.plt section to hold procedure linkage table GOT entries. The
- linker script will put .got.plt into the output .got section. */
-
-static boolean
-elf_i386_create_got_section (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
-
- /* This function may be called more than once. */
- if (bfd_get_section_by_name (abfd, ".got") != NULL)
- return true;
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".got.plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- .got.plt section, which will be placed at the start of the output
- .got section. We don't do this in the linker script because we
- don't want to define the symbol if we are not creating a global
- offset table. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
-
- /* The first three global offset table entries are reserved. */
- s->_raw_size += 3 * 4;
-
- return true;
-}
-
/* Look through the relocs for a section during the first phase, and
allocate space in the global offset table or procedure linkage
table. */
case R_386_GOTOFF:
case R_386_GOTPC:
elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! elf_i386_create_got_section (dynobj, info))
+ if (! _bfd_elf_create_got_section (dynobj, info))
return false;
break;
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (sreloc == NULL)
{
- shared_name = (elf_string_from_elf_section
+ shared_name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
name = h->root.root.string;
else
{
- name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (name == NULL)
return false;
if (*name == '\0')
#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
#define ELF_MAXPAGESIZE 0x1000
#define elf_backend_create_dynamic_sections \
- elf_i386_create_dynamic_sections
+ _bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs elf_i386_check_relocs
#define elf_backend_adjust_dynamic_symbol \
elf_i386_adjust_dynamic_symbol
elf_i386_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf_i386_finish_dynamic_sections
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 0
+#define elf_backend_want_plt_sym 0
#include "elf32-target.h"
--- /dev/null
+/* Intel 860 specific support for 32-bit ELF
+ Copyright 1993 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "libelf.h"
+
+#define bfd_elf32_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
+#define elf_info_to_howto _bfd_elf_no_info_to_howto
+
+#define TARGET_BIG_SYM bfd_elf32_i860_vec
+#define TARGET_BIG_NAME "elf32-i860"
+#define ELF_ARCH bfd_arch_i860
+#define ELF_MACHINE_CODE EM_860
+
+#include "elf32-target.h"
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static void rtype_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
-static boolean elf_m68k_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_m68k_create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_m68k_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
0, 0, 0, 0 /* replaced with offset to start of .plt. */
};
-/* Create dynamic sections when linking against a dynamic object. */
-
-static boolean
-elf_m68k_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
-
- /* We need to create .plt, .rela.plt, .got, .got.plt, .dynbss, and
- .rela.bss sections. */
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY | SEC_CODE)
- || !bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".rela.plt");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || !bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- if (!elf_m68k_create_got_section (abfd, info))
- return false;
-
- /* The .dynbss section is a place to put symbols which are defined
- by dynamic objects, are referenced by regular objects, and are
- not functions. We must allocate space for them in the process
- image and use a R_68K_COPY reloc to tell the dynamic linker to
- initialize them at run time. The linker script puts the .dynbss
- section into the .bss section of the final image. */
- s = bfd_make_section (abfd, ".dynbss");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, SEC_ALLOC))
- return false;
-
- /* The .rela.bss section holds copy relocs. This section is not
- normally needed. We need to create it here, though, so that the
- linker will map it to an output section. We can't just create it
- only if we need it, because we will not know whether we need it
- until we have seen all the input files, and the first time the
- main linker code calls BFD after examining all the input files
- (size_dynamic_sections) the input sections have already been
- mapped to the output sections. If the section turns out not to
- be needed, we can discard it later. We will never need this
- section when generating a shared object, since they do not use
- copy relocs. */
- if (!info->shared)
- {
- s = bfd_make_section (abfd, ".rela.bss");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || !bfd_set_section_alignment (abfd, s, 2))
- return false;
- }
-
- return true;
-}
-
-/* Create the .got section to hold the global offset table, and the
- .got.plt section to hold procedure linkage table GOT entries. The
- linker script will put .got.plt into the output .got section. */
-
-static boolean
-elf_m68k_create_got_section (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
-
- /* This function may be called more than once. */
- if (bfd_get_section_by_name (abfd, ".got") != NULL)
- return true;
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, flags)
- || !bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- s = bfd_make_section (abfd, ".got.plt");
- if (s == NULL
- || !bfd_set_section_flags (abfd, s, flags)
- || !bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- .got.plt section, which will be placed at the start of the output
- .got section. We don't do this in the linker script because we
- don't want to define the symbol if we are not creating a global
- offset table. */
- h = NULL;
- if (!(_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && !bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
-
- /* The first three global offset table entries are reserved. */
- s->_raw_size += 3 * 4;
-
- return true;
-}
-
/* Look through the relocs for a section during the first phase, and
allocate space in the global offset table or procedure linkage
table. */
{
/* Create the .got section. */
elf_hash_table (info)->dynobj = dynobj = abfd;
- if (!elf_m68k_create_got_section (dynobj, info))
+ if (!_bfd_elf_create_got_section (dynobj, info))
return false;
}
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
name = h->root.root.string;
else
{
- name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (name == NULL)
return false;
if (*name == '\0')
#define ELF_MACHINE_CODE EM_68K
#define ELF_MAXPAGESIZE 0x2000
#define elf_backend_create_dynamic_sections \
- elf_m68k_create_dynamic_sections
+ _bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs elf_m68k_check_relocs
#define elf_backend_adjust_dynamic_symbol \
elf_m68k_adjust_dynamic_symbol
elf_m68k_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf_m68k_finish_dynamic_sections
+#define elf_backend_want_got_plt 1
+#define elf_backend_plt_readonly 1
+#define elf_backend_want_plt_sym 0
#include "elf32-target.h"
--- /dev/null
+/* Motorola 88k-specific support for 32-bit ELF
+ Copyright 1993 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "libelf.h"
+
+/* This does not include any relocations, but should be good enough
+ for GDB. */
+
+#define TARGET_BIG_SYM bfd_elf32_m88k_vec
+#define TARGET_BIG_NAME "elf32-m88k"
+#define ELF_ARCH bfd_arch_m88k
+#define ELF_MACHINE_CODE EM_88K
+#define bfd_elf32_bfd_reloc_type_lookup bfd_default_reloc_type_lookup
+#define elf_info_to_howto _bfd_elf_no_info_to_howto
+
+#include "elf32-target.h"
/* Fall back on the generic ELF find_nearest_line routine. */
- return bfd_elf32_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr);
+ return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
+ filename_ptr, functionname_ptr,
+ line_ptr);
}
\f
/* The MIPS ELF linker needs additional information for each symbol in
name = h->root.root.string;
else
{
- name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (name == NULL)
return false;
if (*name == '\0')
arelent **parent;
/* for mips */
int gp_found;
- bfd_vma gp;
+ bfd_vma gp = 0x12345678; /* initialize just to shut gcc up */
{
struct bfd_hash_entry *h;
#include "bfd.h"
#include "sysdep.h"
+#include "bfdlink.h"
#include "libbfd.h"
#include "libelf.h"
+#include "elf/ppc.h"
static bfd_reloc_status_type ppc_elf_unsupported_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_reloc_status_type ppc_elf_std_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+
+static bfd_vma ppc_elf_addr16_ha_inner PARAMS ((asection *, bfd_vma, bfd_vma));
static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static bfd_vma ppc_elf_got16_inner PARAMS ((asection *sec));
static bfd_reloc_status_type ppc_elf_got16_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
+static reloc_howto_type *ppc_elf_reloc_type_lookup
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void powerpc_info_to_howto
+static void ppc_elf_info_to_howto
PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
+static void ppc_elf_howto_init PARAMS ((void));
+static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
+static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
+static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+
+static boolean ppc_elf_relocate_section PARAMS ((bfd *,
+ struct bfd_link_info *info,
+ bfd *,
+ asection *,
+ bfd_byte *,
+ Elf_Internal_Rela *relocs,
+ Elf_Internal_Sym *local_syms,
+ asection **));
#define USE_RELA
R_PPC_max
};
-static reloc_howto_type elf_powerpc_howto_table[] =
+\f
+static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ];
+
+static reloc_howto_type ppc_elf_howto_raw[] =
{
/* This reloc does nothing. */
HOWTO (R_PPC_NONE, /* type */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_NONE", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR32", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR24", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR16", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR16_LO", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR16_HI", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_ADDR14", /* name */
false, /* partial_inplace */
0, /* src_mask */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_REL24", /* name */
false, /* partial_inplace */
0, /* src_mask */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_REL14", /* name */
false, /* partial_inplace */
0, /* src_mask */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_signed, /* complain_on_overflow */
ppc_elf_got16_reloc, /* special_function */
"R_PPC_GOT16", /* name */
false, /* partial_inplace */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_PLT24", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_COPY", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_GLOB_DAT", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_JMP_SLOT", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_RELATIVE", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_UADDR32", /* name */
false, /* partial_inplace */
0, /* src_mask */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_UADDR16", /* name */
false, /* partial_inplace */
0, /* src_mask */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
+ ppc_elf_std_reloc, /* special_function */
"R_PPC_REL32", /* name */
false, /* partial_inplace */
0, /* src_mask */
false), /* pcrel_offset */
};
+\f
+/* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
+
+static void
+ppc_elf_howto_init ()
+{
+ unsigned int i, type;
+
+ for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
+ {
+ type = ppc_elf_howto_raw[i].type;
+ BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0]));
+ ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
+ }
+}
+
+\f
+static reloc_howto_type *
+ppc_elf_reloc_type_lookup (abfd, code)
+ bfd *abfd;
+ bfd_reloc_code_real_type code;
+{
+ if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
+ ppc_elf_howto_init ();
+
+ switch ((int)code)
+ {
+ case BFD_RELOC_NONE: return ppc_elf_howto_table[ (int) R_PPC_NONE ];
+ case BFD_RELOC_32: return ppc_elf_howto_table[ (int) R_PPC_ADDR32 ];
+ case BFD_RELOC_32_PCREL: return ppc_elf_howto_table[ (int) R_PPC_REL32 ];
+ case BFD_RELOC_CTOR: return ppc_elf_howto_table[ (int) R_PPC_ADDR32 ];
+ case BFD_RELOC_PPC_B26: return ppc_elf_howto_table[ (int) R_PPC_REL24 ];
+ case BFD_RELOC_PPC_BA26: return ppc_elf_howto_table[ (int) R_PPC_ADDR24 ];
+ case BFD_RELOC_PPC_TOC16: return ppc_elf_howto_table[ (int) R_PPC_GOT16 ];
+ case BFD_RELOC_LO16: return ppc_elf_howto_table[ (int) R_PPC_ADDR16_LO ];
+ case BFD_RELOC_HI16: return ppc_elf_howto_table[ (int) R_PPC_ADDR16_HI ];
+ case BFD_RELOC_HI16_S: return ppc_elf_howto_table[ (int) R_PPC_ADDR16_HA ];
+ }
+
+ return (reloc_howto_type *)NULL;
+};
+
+/* Set the howto pointer for a PowerPC ELF reloc. */
+
+static void
+ppc_elf_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf32_Internal_Rela *dst;
+{
+ if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
+ ppc_elf_howto_init ();
+
+ BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
+ cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
+
+/* Function to set whether a module needs the -mrelocatable bit set. */
+
+static boolean
+ppc_elf_set_private_flags (abfd, flags)
+ bfd *abfd;
+ flagword flags;
+{
+ BFD_ASSERT (!elf_ppc_flags_init (abfd)
+ || elf_elfheader (abfd)->e_flags == flags);
+
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_ppc_flags_init (abfd) = true;
+ return true;
+}
+
+/* Copy backend specific data from one object module to another */
+static boolean
+ppc_elf_copy_private_bfd_data (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ /* This function is selected based on the input vector. We only
+ want to copy information over if the output BFD also uses Elf
+ format. */
+ if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ BFD_ASSERT (!elf_ppc_flags_init (obfd)
+ || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
+
+ elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
+ elf_ppc_flags_init (obfd) = true;
+ return true;
+}
+
+/* Merge backend specific data from an object file to the output
+ object file when linking */
+static boolean
+ppc_elf_merge_private_bfd_data (ibfd, obfd)
+ bfd *ibfd;
+ bfd *obfd;
+{
+ flagword old_flags;
+ flagword new_flags;
+
+ /* Check if we have the same endianess */
+ if (ibfd->xvec->byteorder_big_p != obfd->xvec->byteorder_big_p)
+ {
+ fprintf (stderr,
+ "%s: compiled for a %s endian system and target is %s endian.\n",
+ bfd_get_filename (ibfd),
+ (ibfd->xvec->byteorder_big_p) ? "big" : "little",
+ (obfd->xvec->byteorder_big_p) ? "big" : "little");
+
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+
+ /* This function is selected based on the input vector. We only
+ want to copy information over if the output BFD also uses Elf
+ format. */
+ if (bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return true;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+ if (!elf_ppc_flags_init (obfd)) /* First call, no flags set */
+ {
+ elf_ppc_flags_init (obfd) = true;
+ elf_elfheader (obfd)->e_flags = new_flags;
+ }
+
+ else if (new_flags == old_flags) /* Compatible flags are ok */
+ ;
+
+ else /* Incompatible flags */
+ {
+ /* Warn about -mrelocatable mismatch */
+ if ((new_flags & EF_PPC_RELOCATABLE) != 0 && (old_flags & EF_PPC_RELOCATABLE) == 0)
+ {
+ new_flags &= ~EF_PPC_RELOCATABLE;
+ fprintf (stderr,
+ "%s: compiled with -mrelocatable and linked with modules compiled normally\n",
+ bfd_get_filename (ibfd));
+ }
+ else if ((new_flags & EF_PPC_RELOCATABLE) == 0 && (old_flags & EF_PPC_RELOCATABLE) != 0)
+ {
+ old_flags &= ~EF_PPC_RELOCATABLE;
+ fprintf (stderr,
+ "%s: compiled normally and linked with modules compiled with -mrelocatable\n",
+ bfd_get_filename (ibfd));
+ }
+
+ /* Warn about eabi vs. V.4 mismatch */
+ if ((new_flags & EF_PPC_EMB) != 0 && (old_flags & EF_PPC_EMB) == 0)
+ {
+ new_flags &= ~EF_PPC_EMB;
+ fprintf (stderr,
+ "%s: compiled for the eabi and linked with modules compiled for System V\n",
+ bfd_get_filename (ibfd));
+ }
+ else if ((new_flags & EF_PPC_EMB) == 0 && (old_flags & EF_PPC_EMB) != 0)
+ {
+ old_flags &= ~EF_PPC_EMB;
+ fprintf (stderr,
+ "%s: compiled for System V and linked with modules compiled for eabi\n",
+ bfd_get_filename (ibfd));
+ }
+
+ /* Warn about any other mismatches */
+ if (new_flags != old_flags)
+ fprintf (stderr,
+ "%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)\n",
+ bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
+
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ return true;
+}
+
+\f
+/* ELF relocs are against symbols. If we are producing relocateable
+ output, and the reloc is against an external symbol, and nothing
+ has given us any additional addend, the resulting reloc will also
+ be against the same symbol. In such a case, we don't want to
+ change anything about the way the reloc is handled, since it will
+ all be done at final link time. Rather than put special case code
+ into bfd_perform_relocation, all the reloc types use this howto
+ function. It just short circuits the reloc if producing
+ relocateable output against an external symbol. */
+
+/*ARGSUSED*/
+static bfd_reloc_status_type
+ppc_elf_std_reloc (abfd,
+ reloc_entry,
+ symbol,
+ data,
+ input_section,
+ output_bfd,
+ error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ if (output_bfd != (bfd *) NULL
+ && (symbol->flags & BSF_SECTION_SYM) == 0
+ && (! reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
+ return bfd_reloc_continue;
+}
+
/* Don't pretend we can deal with unsupported relocs. */
/*ARGSUSED*/
bfd *output_bfd;
char **error_message;
{
- abort ();
+ BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0);
+ fprintf (stderr,
+ "%s: Relocation %s (%d) is not currently supported.\n",
+ bfd_get_filename (abfd),
+ reloc_entry->howto->name,
+ reloc_entry->howto->type);
+
+ return bfd_reloc_notsupported;
+}
+
+/* Internal function to return the adjustment to the addend for relocations
+ that return the upper 16 bits after sign extending the lower 16 bits, ie
+ for use with a ORIS instruction followed by a memory reference using the
+ bottom 16 bits. */
+
+INLINE
+static bfd_vma
+ppc_elf_addr16_ha_inner (sec, value, addend)
+ asection *sec;
+ bfd_vma value;
+ bfd_vma addend;
+{
+ bfd_vma relocation = (value
+ + sec->output_section->vma
+ + sec->output_offset
+ + addend);
+
+ return (relocation & 0x8000) << 1;
}
/* Handle the ADDR16_HA reloc by adjusting the reloc addend. */
+/*ARGSUSED*/
static bfd_reloc_status_type
ppc_elf_addr16_ha_reloc (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
bfd *output_bfd;
char **error_message;
{
- bfd_vma relocation;
-
if (output_bfd != (bfd *) NULL)
- return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message);
+ return ppc_elf_std_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- if (bfd_is_com_section (symbol->section))
- relocation = 0;
- else
- relocation = symbol->value;
+ reloc_entry->addend += ppc_elf_addr16_ha_inner (symbol->section,
+ (bfd_is_com_section (symbol->section)) ? 0 : symbol->value,
+ reloc_entry->addend);
+ return bfd_reloc_continue;
+}
- relocation += (symbol->section->output_section->vma
- + symbol->section->output_offset
- + reloc_entry->addend);
+/* Internal function to return the addjustment to the addend for GOT16
+ entries */
- if ((relocation & 0x8000) != 0)
- reloc_entry->addend += 0x10000;
+INLINE
+static bfd_vma
+ppc_elf_got16_inner (sec)
+ asection *sec;
+{
+ BFD_ASSERT (bfd_is_und_section (sec)
+ || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
+ || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
- return bfd_reloc_continue;
+ return -(sec->output_section->vma + 0x8000);
}
/* Handle the GOT16 reloc. We want to use the offset within the .got
AIX .toc section. When and if we support PIC code, we will have to
change this, perhaps by switching off on the e_type field. */
+/*ARGSUSED*/
static bfd_reloc_status_type
ppc_elf_got16_reloc (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
bfd *output_bfd;
char **error_message;
{
- asection *sec;
-
if (output_bfd != (bfd *) NULL)
- return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message);
+ return ppc_elf_std_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- sec = bfd_get_section (*reloc_entry->sym_ptr_ptr);
- BFD_ASSERT (bfd_is_und_section (sec)
- || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
- || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
- reloc_entry->addend -= sec->output_section->vma;
+ reloc_entry->addend += ppc_elf_got16_inner (bfd_get_section (*reloc_entry->sym_ptr_ptr));
return bfd_reloc_continue;
}
-/* Map BFD reloc types to PowerPC ELF reloc types. */
+\f
+/* The RELOCATE_SECTION function is called by the ELF backend linker
+ to handle the relocations for a section.
-struct powerpc_reloc_map
-{
- unsigned char bfd_reloc_val;
- unsigned char elf_reloc_val;
-};
+ The relocs are always passed as Rela structures; if the section
+ actually uses Rel structures, the r_addend field will always be
+ zero.
-static const struct powerpc_reloc_map powerpc_reloc_map[] =
-{
- { BFD_RELOC_NONE, R_PPC_NONE, },
- { BFD_RELOC_32, R_PPC_ADDR32 },
- { BFD_RELOC_32_PCREL, R_PPC_REL32 },
- { BFD_RELOC_CTOR, R_PPC_ADDR32 },
- { BFD_RELOC_PPC_B26, R_PPC_REL24 },
- { BFD_RELOC_PPC_BA26, R_PPC_ADDR24 },
- { BFD_RELOC_PPC_TOC16, R_PPC_GOT16 },
- { BFD_RELOC_LO16, R_PPC_ADDR16_LO },
- { BFD_RELOC_HI16, R_PPC_ADDR16_HI },
- { BFD_RELOC_HI16_S, R_PPC_ADDR16_HA }
-};
+ This function is responsible for adjust the section contents as
+ necessary, and (if using Rela relocs and generating a
+ relocateable output file) adjusting the reloc addend as
+ necessary.
-static reloc_howto_type *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd;
- bfd_reloc_code_real_type code;
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+
+static boolean
+ppc_elf_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ Elf_Internal_Rela *relocs;
+ Elf_Internal_Sym *local_syms;
+ asection **local_sections;
{
- int i;
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
+ Elf_Internal_Rela *rel = relocs;
+ Elf_Internal_Rela *relend = relocs + input_section->reloc_count;
+ boolean ret = true;
+
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, %ld relocations%s\n",
+ bfd_get_filename (input_bfd),
+ bfd_section_name(input_bfd, input_section),
+ (long)input_section->reloc_count,
+ (info->relocateable) ? " (relocatable)" : "");
+#endif
+
+ if (!ppc_elf_howto_table[ R_PPC_ADDR32 ]) /* Initialize howto table if needed */
+ ppc_elf_howto_init ();
- for (i = 0;
- i < sizeof (powerpc_reloc_map) / sizeof (struct powerpc_reloc_map);
- i++)
+ for (; rel < relend; rel++)
{
- if (powerpc_reloc_map[i].bfd_reloc_val == code)
- return &elf_powerpc_howto_table[powerpc_reloc_map[i].elf_reloc_val];
+ enum reloc_type r_type = (enum reloc_type)ELF32_R_TYPE (rel->r_info);
+ bfd_vma offset = rel->r_offset;
+ bfd_vma addend = rel->r_addend;
+ bfd_reloc_status_type r = bfd_reloc_other;
+ Elf_Internal_Sym *sym = (Elf_Internal_Sym *)0;
+ asection *sec = (asection *)0;
+ struct elf_link_hash_entry *h = (struct elf_link_hash_entry *)0;
+ reloc_howto_type *howto;
+ unsigned long r_symndx;
+ bfd_vma relocation;
+
+ /* Unknown relocation handling */
+ if ((unsigned)r_type >= (unsigned)R_PPC_max || !ppc_elf_howto_table[(int)r_type])
+ {
+ fprintf (stderr,
+ "%s: Unknown relocation type %d\n",
+ bfd_get_filename (input_bfd),
+ (int)r_type);
+
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+ }
+
+ howto = ppc_elf_howto_table[(int)r_type];
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocateable)
+ {
+ /* This is a relocateable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sec = local_sections[r_symndx];
+ addend = rel->r_addend += sec->output_offset + sym->st_value;
+ }
+ }
+
+#ifdef DEBUG
+ fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
+ howto->name,
+ (int)r_type,
+ r_symndx,
+ (long)offset,
+ (long)addend);
+#endif
+ continue;
+ }
+
+ /* This is a final link. */
+
+ /* Complain about known relocation that are not yet supported */
+ if (howto->special_function == ppc_elf_unsupported_reloc)
+ {
+ fprintf (stderr,
+ "%s: Relocation %s (%d) is not currently supported.\n",
+ bfd_get_filename (input_bfd),
+ howto->name,
+ (int)r_type);
+
+ bfd_set_error (bfd_error_bad_value);
+ ret = false;
+ continue;
+ }
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections[r_symndx];
+ relocation = (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value);
+ }
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ sec = h->root.u.def.section;
+ relocation = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if (h->root.type == bfd_link_hash_undefweak)
+ relocation = 0;
+ else if (info->shared)
+ relocation = 0;
+ else
+ {
+ (*info->callbacks->undefined_symbol)(info,
+ h->root.root.string,
+ input_bfd,
+ input_section,
+ rel->r_offset);
+ ret = false;
+ continue;
+ }
+ }
+
+ switch ((int)r_type)
+ {
+ default:
+ break;
+
+ case (int)R_PPC_GOT16: /* GOT16 relocations */
+ case (int)R_PPC_GOT16_LO:
+ case (int)R_PPC_GOT16_HI:
+ BFD_ASSERT (sec != (asection *)0);
+ addend += ppc_elf_got16_inner (sec);
+ break;
+
+ case (int)R_PPC_ADDR16_HA: /* arithmetic adjust relocations */
+ BFD_ASSERT (sec != (asection *)0);
+ addend += ppc_elf_addr16_ha_inner (sec, relocation, addend);
+ break;
+ }
+
+
+#ifdef DEBUG
+ fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
+ howto->name,
+ (int)r_type,
+ r_symndx,
+ (long)offset,
+ (long)addend);
+#endif
+
+ r = _bfd_final_link_relocate (howto,
+ input_bfd,
+ input_section,
+ contents,
+ offset,
+ relocation,
+ addend);
+
+ if (r != bfd_reloc_ok)
+ {
+ ret = false;
+ switch (r)
+ {
+ default:
+ break;
+
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+
+ if (h != NULL)
+ name = h->root.root.string;
+ else
+ {
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
+ if (name == NULL)
+ break;
+
+ if (*name == '\0')
+ name = bfd_section_name (input_bfd, sec);
+ }
+
+ (*info->callbacks->reloc_overflow)(info,
+ name,
+ howto->name,
+ (bfd_vma) 0,
+ input_bfd,
+ input_section,
+ offset);
+ }
+ break;
+
+ }
+ }
}
- return NULL;
-}
-/* Set the howto pointer for a PowerPC ELF reloc. */
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
-static void
-powerpc_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf32_Internal_Rela *dst;
-{
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
- cache_ptr->howto = &elf_powerpc_howto_table[ELF32_R_TYPE (dst->r_info)];
+ return ret;
}
+#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
+#define TARGET_LITTLE_NAME "elf32-powerpcle"
#define TARGET_BIG_SYM bfd_elf32_powerpc_vec
#define TARGET_BIG_NAME "elf32-powerpc"
#define ELF_ARCH bfd_arch_powerpc
#define ELF_MACHINE_CODE EM_PPC
#define ELF_MAXPAGESIZE 0x10000
-#define elf_info_to_howto powerpc_info_to_howto
+#define elf_info_to_howto ppc_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
#define ELF_MACHINE_ALT2 EM_PPC_OLD
#endif
+#define bfd_elf32_bfd_copy_private_bfd_data ppc_elf_copy_private_bfd_data
+#define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
+#define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
+#define elf_backend_relocate_section ppc_elf_relocate_section
+
#include "elf32-target.h"
PARAMS ((bfd *, bfd_reloc_code_real_type));
static void elf_info_to_howto
PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
-static boolean elf32_sparc_create_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf32_sparc_create_got_section
- PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf32_sparc_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
/* nop. */
#define PLT_ENTRY_WORD2 SPARC_NOP
-/* Create dynamic sections when linking against a dynamic object. */
-
-static boolean
-elf32_sparc_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
-
- /* We need to create .plt, .rela.plt, .got, .dynbss, and .rela.bss
- sections. */
-
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- s = bfd_make_section (abfd, ".plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_CODE)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
-
- s = bfd_make_section (abfd, ".rela.plt");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- if (! elf32_sparc_create_got_section (abfd, info))
- return false;
-
- /* The .dynbss section is a place to put symbols which are defined
- by dynamic objects, are referenced by regular objects, and are
- not functions. We must allocate space for them in the process
- image and use a R_SPARC_COPY reloc to tell the dynamic linker to
- initialize them at run time. The linker script puts the .dynbss
- section into the .bss section of the final image. */
- s = bfd_make_section (abfd, ".dynbss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
- return false;
-
- /* The .rela.bss section holds copy relocs. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".rela.bss");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
- }
-
- return true;
-}
-
-/* Create the .got section to hold the global offset table. */
-
-static boolean
-elf32_sparc_create_got_section (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- register asection *s;
- struct elf_link_hash_entry *h;
-
- /* This function may be called more than once. */
- if (bfd_get_section_by_name (abfd, ".got") != NULL)
- return true;
-
- s = bfd_make_section (abfd, ".got");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s,
- (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY))
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
-
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
- section. We don't do this in the linker script because we don't
- want to define the symbol if we are not creating a global offset
- table. FIXME: The Solaris linker puts _GLOBAL_OFFSET_TABLE_ at
- the start of the .got section, but when using the small PIC model
- the .got is accessed using a signed 13 bit offset. Shouldn't
- _GLOBAL_OFFSET_TABLE_ be located at .got + 4096? */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! bfd_elf32_link_record_dynamic_symbol (info, h))
- return false;
-
- /* The first global offset table entry is reserved. */
- s->_raw_size += 4;
-
- return true;
-}
-
/* Look through the relocs for a section during the first phase, and
allocate space in the global offset table or procedure linkage
table. */
{
/* Create the .got section. */
elf_hash_table (info)->dynobj = dynobj = abfd;
- if (! elf32_sparc_create_got_section (dynobj, info))
+ if (! _bfd_elf_create_got_section (dynobj, info))
return false;
}
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
{
const char *name;
- name = (elf_string_from_elf_section
+ name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
name = h->root.root.string;
else
{
- name = elf_string_from_elf_section (input_bfd,
- symtab_hdr->sh_link,
- sym->st_name);
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
if (name == NULL)
return false;
if (*name == '\0')
sym.st_shndx = indx;
bfd_elf32_swap_symbol_out (output_bfd, &sym,
- ((Elf32_External_Sym *) sdynsym->contents
+(char*) ((Elf32_External_Sym *) sdynsym->contents
+ elf_section_data (s)->dynindx));
}
#define ELF_MACHINE_CODE EM_SPARC
#define ELF_MAXPAGESIZE 0x10000
#define elf_backend_create_dynamic_sections \
- elf32_sparc_create_dynamic_sections
+ _bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs elf32_sparc_check_relocs
#define elf_backend_adjust_dynamic_symbol \
elf32_sparc_adjust_dynamic_symbol
elf32_sparc_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
elf32_sparc_finish_dynamic_sections
+#define elf_backend_want_got_plt 0
+#define elf_backend_plt_readonly 1
+#define elf_backend_want_plt_sym 1
#include "elf32-target.h"
#define elf_set_section_contents NAME(bfd_elf,set_section_contents)
#define elf_no_info_to_howto NAME(bfd_elf,no_info_to_howto)
#define elf_no_info_to_howto_rel NAME(bfd_elf,no_info_to_howto_rel)
-#define elf_new_section_hook NAME(bfd_elf,new_section_hook)
#define elf_find_section NAME(bfd_elf,find_section)
#define elf_bfd_link_add_symbols NAME(bfd_elf,bfd_link_add_symbols)
#define elf_add_dynamic_entry NAME(bfd_elf,add_dynamic_entry)
#define elf_link_create_dynamic_sections \
NAME(bfd_elf,link_create_dynamic_sections)
-#define elf_link_record_dynamic_symbol \
- NAME(bfd_elf,link_record_dynamic_symbol)
+#define elf_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
#define elf_bfd_final_link NAME(bfd_elf,bfd_final_link)
#if ARCH_SIZE == 64
/* Forward declarations of static functions */
-static struct bfd_strtab_hash *elf_stringtab_init PARAMS ((void));
-static asection *section_from_elf_index PARAMS ((bfd *, unsigned int));
+#define elf_stringtab_init _bfd_elf_stringtab_init
-static int elf_section_from_bfd_section PARAMS ((bfd *, struct sec *));
+extern struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void));
+#define section_from_elf_index bfd_section_from_elf_index
+extern boolean bfd_section_from_phdr PARAMS ((bfd *, Elf_Internal_Phdr *,
+ int));
+
+ int _bfd_elf_section_from_bfd_section PARAMS ((bfd *, struct sec *));
static long elf_slurp_symbol_table PARAMS ((bfd *, asymbol **, boolean));
static boolean elf_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **));
-static int elf_symbol_from_bfd_symbol PARAMS ((bfd *,
+ int _bfd_elf_symbol_from_bfd_symbol PARAMS ((bfd *,
struct symbol_cache_entry **));
-static boolean elf_compute_section_file_positions
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean prep_headers PARAMS ((bfd *));
static void write_relocs PARAMS ((bfd *, asection *, PTR));
-static void elf_fake_sections PARAMS ((bfd *, asection *, PTR));
-static boolean assign_section_numbers PARAMS ((bfd *));
static file_ptr align_file_position PARAMS ((file_ptr));
-static file_ptr assign_file_position_for_section
- PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean));
-static boolean assign_file_positions_except_relocs PARAMS ((bfd *, boolean));
-static int elf_sort_hdrs PARAMS ((const PTR, const PTR));
-static void assign_file_positions_for_relocs PARAMS ((bfd *));
-static bfd_size_type get_program_header_size PARAMS ((bfd *,
- Elf_Internal_Shdr **,
- unsigned int,
- bfd_vma));
-static file_ptr map_program_segments
- PARAMS ((bfd *, file_ptr, Elf_Internal_Shdr *, Elf_Internal_Shdr **,
- bfd_size_type));
-
-static boolean elf_map_symbols PARAMS ((bfd *));
-static boolean swap_out_syms PARAMS ((bfd *, struct bfd_strtab_hash **));
-
-static boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
+
+ boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
#ifdef DEBUG
static void elf_debug_section PARAMS ((int, Elf_Internal_Shdr *));
static void elf_debug_file PARAMS ((Elf_Internal_Ehdr *));
static char *elf_symbol_flags PARAMS ((flagword));
#endif
-
-#define elf_string_from_elf_strtab(abfd,strindex) \
- elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
\f
/* Structure swapping routines */
format. */
void
-elf_swap_symbol_out (abfd, src, dst)
+elf_swap_symbol_out (abfd, src, cdst)
bfd *abfd;
Elf_Internal_Sym *src;
- Elf_External_Sym *dst;
+ char *cdst;
{
+ Elf_External_Sym *dst = (Elf_External_Sym *) cdst;
bfd_h_put_32 (abfd, src->st_name, dst->st_name);
put_word (abfd, src->st_value, dst->st_value);
put_word (abfd, src->st_size, dst->st_size);
put_word (abfd, src->d_un.d_val, dst->d_un.d_val);
}
\f
-/* Allocate an ELF string table--force the first byte to be zero. */
-
-static struct bfd_strtab_hash *
-elf_stringtab_init ()
-{
- struct bfd_strtab_hash *ret;
-
- ret = _bfd_stringtab_init ();
- if (ret != NULL)
- {
- bfd_size_type loc;
-
- loc = _bfd_stringtab_add (ret, "", true, false);
- BFD_ASSERT (loc == 0 || loc == (bfd_size_type) -1);
- if (loc == (bfd_size_type) -1)
- {
- _bfd_stringtab_free (ret);
- ret = NULL;
- }
- }
- return ret;
-}
-\f
/* ELF .o/exec file reading */
-/* Create a new bfd section from an ELF section header. */
-
-static boolean
-bfd_section_from_shdr (abfd, shindex)
- bfd *abfd;
- unsigned int shindex;
-{
- Elf_Internal_Shdr *hdr = elf_elfsections (abfd)[shindex];
- Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
- char *name;
-
- name = elf_string_from_elf_strtab (abfd, hdr->sh_name);
-
- switch (hdr->sh_type)
- {
- case SHT_NULL:
- /* Inactive section. Throw it away. */
- return true;
-
- case SHT_PROGBITS: /* Normal section with contents. */
- case SHT_DYNAMIC: /* Dynamic linking information. */
- case SHT_NOBITS: /* .bss section. */
- case SHT_HASH: /* .hash section. */
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_SYMTAB: /* A symbol table */
- if (elf_onesymtab (abfd) == shindex)
- return true;
-
- BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
- BFD_ASSERT (elf_onesymtab (abfd) == 0);
- elf_onesymtab (abfd) = shindex;
- elf_tdata (abfd)->symtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->symtab_hdr;
- abfd->flags |= HAS_SYMS;
-
- /* Sometimes a shared object will map in the symbol table. If
- SHF_ALLOC is set, and this is a shared object, then we also
- treat this section as a BFD section. We can not base the
- decision purely on SHF_ALLOC, because that flag is sometimes
- set in a relocateable object file, which would confuse the
- linker. */
- if ((hdr->sh_flags & SHF_ALLOC) != 0
- && (abfd->flags & DYNAMIC) != 0
- && ! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return false;
-
- return true;
-
- case SHT_DYNSYM: /* A dynamic symbol table */
- if (elf_dynsymtab (abfd) == shindex)
- return true;
-
- BFD_ASSERT (hdr->sh_entsize == sizeof (Elf_External_Sym));
- BFD_ASSERT (elf_dynsymtab (abfd) == 0);
- elf_dynsymtab (abfd) = shindex;
- elf_tdata (abfd)->dynsymtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->dynsymtab_hdr;
- abfd->flags |= HAS_SYMS;
-
- /* Besides being a symbol table, we also treat this as a regular
- section, so that objcopy can handle it. */
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_STRTAB: /* A string table */
- if (hdr->bfd_section != NULL)
- return true;
- if (ehdr->e_shstrndx == shindex)
- {
- elf_tdata (abfd)->shstrtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] = &elf_tdata (abfd)->shstrtab_hdr;
- return true;
- }
- {
- unsigned int i;
-
- for (i = 1; i < ehdr->e_shnum; i++)
- {
- Elf_Internal_Shdr *hdr2 = elf_elfsections (abfd)[i];
- if (hdr2->sh_link == shindex)
- {
- if (! bfd_section_from_shdr (abfd, i))
- return false;
- if (elf_onesymtab (abfd) == i)
- {
- elf_tdata (abfd)->strtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] =
- &elf_tdata (abfd)->strtab_hdr;
- return true;
- }
- if (elf_dynsymtab (abfd) == i)
- {
- elf_tdata (abfd)->dynstrtab_hdr = *hdr;
- elf_elfsections (abfd)[shindex] =
- &elf_tdata (abfd)->dynstrtab_hdr;
- /* We also treat this as a regular section, so
- that objcopy can handle it. */
- break;
- }
-#if 0 /* Not handling other string tables specially right now. */
- hdr2 = elf_elfsections (abfd)[i]; /* in case it moved */
- /* We have a strtab for some random other section. */
- newsect = (asection *) hdr2->bfd_section;
- if (!newsect)
- break;
- hdr->bfd_section = newsect;
- hdr2 = &elf_section_data (newsect)->str_hdr;
- *hdr2 = *hdr;
- elf_elfsections (abfd)[shindex] = hdr2;
-#endif
- }
- }
- }
-
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- case SHT_REL:
- case SHT_RELA:
- /* *These* do a lot of work -- but build no sections! */
- {
- asection *target_sect;
- Elf_Internal_Shdr *hdr2;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- /* Get the symbol table. */
- if (! bfd_section_from_shdr (abfd, hdr->sh_link))
- return false;
-
- /* If this reloc section does not use the main symbol table we
- don't treat it as a reloc section. BFD can't adequately
- represent such a section, so at least for now, we don't
- try. We just present it as a normal section. */
- if (hdr->sh_link != elf_onesymtab (abfd))
- return _bfd_elf_make_section_from_shdr (abfd, hdr, name);
-
- /* Don't allow REL relocations on a machine that uses RELA and
- vice versa. */
- /* @@ Actually, the generic ABI does suggest that both might be
- used in one file. But the four ABI Processor Supplements I
- have access to right now all specify that only one is used on
- each of those architectures. It's conceivable that, e.g., a
- bunch of absolute 32-bit relocs might be more compact in REL
- form even on a RELA machine... */
- BFD_ASSERT (use_rela_p
- ? (hdr->sh_type == SHT_RELA
- && hdr->sh_entsize == sizeof (Elf_External_Rela))
- : (hdr->sh_type == SHT_REL
- && hdr->sh_entsize == sizeof (Elf_External_Rel)));
-
- if (! bfd_section_from_shdr (abfd, hdr->sh_info))
- return false;
- target_sect = section_from_elf_index (abfd, hdr->sh_info);
- if (target_sect == NULL)
- return false;
-
- hdr2 = &elf_section_data (target_sect)->rel_hdr;
- *hdr2 = *hdr;
- elf_elfsections (abfd)[shindex] = hdr2;
- target_sect->reloc_count = hdr->sh_size / hdr->sh_entsize;
- target_sect->flags |= SEC_RELOC;
- target_sect->relocation = NULL;
- target_sect->rel_filepos = hdr->sh_offset;
- abfd->flags |= HAS_RELOC;
- return true;
- }
- break;
-
- case SHT_NOTE:
-#if 0
- fprintf (stderr, "Note Sections not yet supported.\n");
- BFD_FAIL ();
-#endif
- break;
-
- case SHT_SHLIB:
-#if 0
- fprintf (stderr, "SHLIB Sections not supported (and non conforming.)\n");
-#endif
- return true;
-
- default:
- /* Check for any processor-specific section types. */
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (bed->elf_backend_section_from_shdr)
- (*bed->elf_backend_section_from_shdr) (abfd, hdr, name);
- }
- break;
- }
-
- return true;
-}
-
-boolean
-elf_new_section_hook (abfd, sec)
- bfd *abfd
- ;
- asection *sec;
-{
- struct bfd_elf_section_data *sdata;
-
- sdata = (struct bfd_elf_section_data *) bfd_alloc (abfd, sizeof (*sdata));
- if (!sdata)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- sec->used_by_bfd = (PTR) sdata;
- memset (sdata, 0, sizeof (*sdata));
- return true;
-}
-
-/* Create a new bfd section from an ELF program header.
-
- Since program segments have no names, we generate a synthetic name
- of the form segment<NUM>, where NUM is generally the index in the
- program header table. For segments that are split (see below) we
- generate the names segment<NUM>a and segment<NUM>b.
-
- Note that some program segments may have a file size that is different than
- (less than) the memory size. All this means is that at execution the
- system must allocate the amount of memory specified by the memory size,
- but only initialize it with the first "file size" bytes read from the
- file. This would occur for example, with program segments consisting
- of combined data+bss.
-
- To handle the above situation, this routine generates TWO bfd sections
- for the single program segment. The first has the length specified by
- the file size of the segment, and the second has the length specified
- by the difference between the two sizes. In effect, the segment is split
- into it's initialized and uninitialized parts.
-
- */
-
-static boolean
-bfd_section_from_phdr (abfd, hdr, index)
- bfd *abfd;
- Elf_Internal_Phdr *hdr;
- int index;
-{
- asection *newsect;
- char *name;
- char namebuf[64];
- int split;
-
- split = ((hdr->p_memsz > 0) &&
- (hdr->p_filesz > 0) &&
- (hdr->p_memsz > hdr->p_filesz));
- sprintf (namebuf, split ? "segment%da" : "segment%d", index);
- name = bfd_alloc (abfd, strlen (namebuf) + 1);
- if (!name)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strcpy (name, namebuf);
- newsect = bfd_make_section (abfd, name);
- if (newsect == NULL)
- return false;
- newsect->vma = hdr->p_vaddr;
- newsect->_raw_size = hdr->p_filesz;
- newsect->filepos = hdr->p_offset;
- newsect->flags |= SEC_HAS_CONTENTS;
- if (hdr->p_type == PT_LOAD)
- {
- newsect->flags |= SEC_ALLOC;
- newsect->flags |= SEC_LOAD;
- if (hdr->p_flags & PF_X)
- {
- /* FIXME: all we known is that it has execute PERMISSION,
- may be data. */
- newsect->flags |= SEC_CODE;
- }
- }
- if (!(hdr->p_flags & PF_W))
- {
- newsect->flags |= SEC_READONLY;
- }
-
- if (split)
- {
- sprintf (namebuf, "segment%db", index);
- name = bfd_alloc (abfd, strlen (namebuf) + 1);
- if (!name)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strcpy (name, namebuf);
- newsect = bfd_make_section (abfd, name);
- if (newsect == NULL)
- return false;
- newsect->vma = hdr->p_vaddr + hdr->p_filesz;
- newsect->_raw_size = hdr->p_memsz - hdr->p_filesz;
- if (hdr->p_type == PT_LOAD)
- {
- newsect->flags |= SEC_ALLOC;
- if (hdr->p_flags & PF_X)
- newsect->flags |= SEC_CODE;
- }
- if (!(hdr->p_flags & PF_W))
- newsect->flags |= SEC_READONLY;
- }
-
- return true;
-}
/* Begin processing a given object.
bfd_section_from_shdr with it (since this particular strtab is
used to find all of the ELF section names.) */
- shstrtab = elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
+ shstrtab = bfd_elf_get_str_section (abfd, i_ehdrp->e_shstrndx);
if (!shstrtab)
goto got_no_match;
/* ELF .o/exec file writing */
-/* Takes a bfd and a symbol, returns a pointer to the elf specific area
- of the symbol if there is one. */
-static INLINE elf_symbol_type *
-elf_symbol_from (ignore_abfd, symbol)
- bfd *ignore_abfd;
- asymbol *symbol;
-{
- if (symbol->the_bfd->xvec->flavour != bfd_target_elf_flavour)
- return 0;
-
- if (symbol->the_bfd->tdata.elf_obj_data == (struct elf_obj_tdata *) NULL)
- return 0;
-
- return (elf_symbol_type *) symbol;
-}
-
static void
write_relocs (abfd, sec, data)
bfd *abfd;
else
{
last_sym = sym;
- last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
+ last_sym_idx = n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
}
dst_rela.r_info = ELF_R_INFO (n, ptr->howto->type);
else
{
last_sym = sym;
- last_sym_idx = n = elf_symbol_from_bfd_symbol (abfd, &sym);
+ last_sym_idx = n = _bfd_elf_symbol_from_bfd_symbol (abfd, &sym);
}
dst_rel.r_info = ELF_R_INFO (n, ptr->howto->type);
}
}
-/* Set up an ELF internal section header for a section. */
+/* Align to the maximum file alignment that could be required for any
+ ELF data structure. */
-/*ARGSUSED*/
-static void
-elf_fake_sections (abfd, asect, failedptrarg)
- bfd *abfd;
- asection *asect;
- PTR failedptrarg;
+static INLINE file_ptr
+align_file_position (off)
+ file_ptr off;
{
- boolean *failedptr = (boolean *) failedptrarg;
- Elf_Internal_Shdr *this_hdr;
-
- if (*failedptr)
- {
- /* We already failed; just get out of the bfd_map_over_sections
- loop. */
- return;
- }
-
- this_hdr = &elf_section_data (asect)->this_hdr;
-
- this_hdr->sh_name = (unsigned long) _bfd_stringtab_add (elf_shstrtab (abfd),
- asect->name,
- true, false);
- if (this_hdr->sh_name == (unsigned long) -1)
- {
- *failedptr = true;
- return;
- }
-
- this_hdr->sh_flags = 0;
- if ((asect->flags & SEC_ALLOC) != 0)
- this_hdr->sh_addr = asect->vma;
- else
- this_hdr->sh_addr = 0;
- this_hdr->sh_offset = 0;
- this_hdr->sh_size = asect->_raw_size;
- this_hdr->sh_link = 0;
- this_hdr->sh_info = 0;
- this_hdr->sh_addralign = 1 << asect->alignment_power;
- this_hdr->sh_entsize = 0;
-
- this_hdr->bfd_section = asect;
- this_hdr->contents = NULL;
-
- /* FIXME: This should not be based on section names. */
- if (strcmp (asect->name, ".dynstr") == 0)
- this_hdr->sh_type = SHT_STRTAB;
- else if (strcmp (asect->name, ".hash") == 0)
- {
- this_hdr->sh_type = SHT_HASH;
- this_hdr->sh_entsize = ARCH_SIZE / 8;
- }
- else if (strcmp (asect->name, ".dynsym") == 0)
- {
- this_hdr->sh_type = SHT_DYNSYM;
- this_hdr->sh_entsize = sizeof (Elf_External_Sym);
- }
- else if (strcmp (asect->name, ".dynamic") == 0)
- {
- this_hdr->sh_type = SHT_DYNAMIC;
- this_hdr->sh_entsize = sizeof (Elf_External_Dyn);
- }
- else if (strncmp (asect->name, ".rela", 5) == 0
- && get_elf_backend_data (abfd)->use_rela_p)
- {
- this_hdr->sh_type = SHT_RELA;
- this_hdr->sh_entsize = sizeof (Elf_External_Rela);
- }
- else if (strncmp (asect->name, ".rel", 4) == 0
- && ! get_elf_backend_data (abfd)->use_rela_p)
- {
- this_hdr->sh_type = SHT_REL;
- this_hdr->sh_entsize = sizeof (Elf_External_Rel);
- }
- else if (strcmp (asect->name, ".note") == 0)
- this_hdr->sh_type = SHT_NOTE;
- else if (strncmp (asect->name, ".stab", 5) == 0
- && strcmp (asect->name + strlen (asect->name) - 3, "str") == 0)
- this_hdr->sh_type = SHT_STRTAB;
- else if ((asect->flags & SEC_ALLOC) != 0
- && (asect->flags & SEC_LOAD) != 0)
- this_hdr->sh_type = SHT_PROGBITS;
- else if ((asect->flags & SEC_ALLOC) != 0
- && ((asect->flags & SEC_LOAD) == 0))
- {
- BFD_ASSERT (strcmp (asect->name, ".bss") == 0
- || strcmp (asect->name, ".sbss") == 0
- || strcmp (asect->name, ".scommon") == 0
- || strcmp (asect->name, "COMMON") == 0);
- this_hdr->sh_type = SHT_NOBITS;
- }
- else
- {
- /* Who knows? */
- this_hdr->sh_type = SHT_PROGBITS;
- }
-
- if ((asect->flags & SEC_ALLOC) != 0)
- this_hdr->sh_flags |= SHF_ALLOC;
- if ((asect->flags & SEC_READONLY) == 0)
- this_hdr->sh_flags |= SHF_WRITE;
- if ((asect->flags & SEC_CODE) != 0)
- this_hdr->sh_flags |= SHF_EXECINSTR;
-
- /* Check for processor-specific section types. */
- {
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (bed->elf_backend_fake_sections)
- (*bed->elf_backend_fake_sections) (abfd, this_hdr, asect);
- }
+ return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
+}
- /* If the section has relocs, set up a section header for the
- SHT_REL[A] section. */
- if ((asect->flags & SEC_RELOC) != 0)
+static int
+write_out_phdrs (abfd, phdr, count)
+ bfd *abfd;
+ Elf_Internal_Phdr *phdr;
+ int count;
+{
+ while (count--)
{
- Elf_Internal_Shdr *rela_hdr;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
- char *name;
-
- rela_hdr = &elf_section_data (asect)->rel_hdr;
- name = bfd_alloc (abfd, sizeof ".rela" + strlen (asect->name));
- if (name == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- *failedptr = true;
- return;
- }
- sprintf (name, "%s%s", use_rela_p ? ".rela" : ".rel", asect->name);
- rela_hdr->sh_name =
- (unsigned int) _bfd_stringtab_add (elf_shstrtab (abfd), name,
- true, false);
- if (rela_hdr->sh_name == (unsigned int) -1)
- {
- *failedptr = true;
- return;
- }
- rela_hdr->sh_type = use_rela_p ? SHT_RELA : SHT_REL;
- rela_hdr->sh_entsize = (use_rela_p
- ? sizeof (Elf_External_Rela)
- : sizeof (Elf_External_Rel));
- rela_hdr->sh_addralign = FILE_ALIGN;
- rela_hdr->sh_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_size = 0;
- rela_hdr->sh_offset = 0;
+ Elf_External_Phdr extphdr;
+ elf_swap_phdr_out (abfd, phdr, &extphdr);
+ if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd)
+ != sizeof (Elf_External_Phdr))
+ return -1;
+ phdr++;
}
+ return 0;
}
-/* Assign all ELF section numbers. The dummy first section is handled here
- too. The link/info pointers for the standard section types are filled
- in here too, while we're at it. */
-
static boolean
-assign_section_numbers (abfd)
+write_shdrs_and_ehdr (abfd)
bfd *abfd;
{
- struct elf_obj_tdata *t = elf_tdata (abfd);
- asection *sec;
- unsigned int section_number;
- Elf_Internal_Shdr **i_shdrp;
-
- section_number = 1;
-
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- struct bfd_elf_section_data *d = elf_section_data (sec);
-
- d->this_idx = section_number++;
- if ((sec->flags & SEC_RELOC) == 0)
- d->rel_idx = 0;
- else
- d->rel_idx = section_number++;
- }
-
- t->shstrtab_section = section_number++;
- elf_elfheader (abfd)->e_shstrndx = t->shstrtab_section;
- t->shstrtab_hdr.sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Shdr *x_shdrp; /* Section header table, external form */
+ Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
+ unsigned int count;
- if (abfd->symcount > 0)
- {
- t->symtab_section = section_number++;
- t->strtab_section = section_number++;
- }
+ i_ehdrp = elf_elfheader (abfd);
+ i_shdrp = elf_elfsections (abfd);
- elf_elfheader (abfd)->e_shnum = section_number;
+ /* swap the header before spitting it out... */
- /* Set up the list of section header pointers, in agreement with the
- indices. */
- i_shdrp = ((Elf_Internal_Shdr **)
- bfd_alloc (abfd, section_number * sizeof (Elf_Internal_Shdr *)));
- if (i_shdrp == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
+#endif
+ elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
+ if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
+ || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd)
+ != sizeof (x_ehdr)))
+ return false;
- i_shdrp[0] = ((Elf_Internal_Shdr *)
- bfd_alloc (abfd, sizeof (Elf_Internal_Shdr)));
- if (i_shdrp[0] == NULL)
+ /* at this point we've concocted all the ELF sections... */
+ x_shdrp = (Elf_External_Shdr *)
+ bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
+ if (!x_shdrp)
{
- bfd_release (abfd, i_shdrp);
bfd_set_error (bfd_error_no_memory);
return false;
}
- memset (i_shdrp[0], 0, sizeof (Elf_Internal_Shdr));
-
- elf_elfsections (abfd) = i_shdrp;
- i_shdrp[t->shstrtab_section] = &t->shstrtab_hdr;
- if (abfd->symcount > 0)
+ for (count = 0; count < i_ehdrp->e_shnum; count++)
{
- i_shdrp[t->symtab_section] = &t->symtab_hdr;
- i_shdrp[t->strtab_section] = &t->strtab_hdr;
- t->symtab_hdr.sh_link = t->strtab_section;
+#if DEBUG & 2
+ elf_debug_section (count, i_shdrp[count]);
+#endif
+ elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
}
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- struct bfd_elf_section_data *d = elf_section_data (sec);
- asection *s;
- const char *name;
-
- i_shdrp[d->this_idx] = &d->this_hdr;
- if (d->rel_idx != 0)
- i_shdrp[d->rel_idx] = &d->rel_hdr;
-
- /* Fill in the sh_link and sh_info fields while we're at it. */
-
- /* sh_link of a reloc section is the section index of the symbol
- table. sh_info is the section index of the section to which
- the relocation entries apply. */
- if (d->rel_idx != 0)
- {
- d->rel_hdr.sh_link = t->symtab_section;
- d->rel_hdr.sh_info = d->this_idx;
- }
-
- switch (d->this_hdr.sh_type)
- {
- case SHT_REL:
- case SHT_RELA:
- /* A reloc section which we are treating as a normal BFD
- section. sh_link is the section index of the symbol
- table. sh_info is the section index of the section to
- which the relocation entries apply. We assume that an
- allocated reloc section uses the dynamic symbol table.
- FIXME: How can we be sure? */
- s = bfd_get_section_by_name (abfd, ".dynsym");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
-
- /* We look up the section the relocs apply to by name. */
- name = sec->name;
- if (d->this_hdr.sh_type == SHT_REL)
- name += 4;
- else
- name += 5;
- s = bfd_get_section_by_name (abfd, name);
- if (s != NULL)
- d->this_hdr.sh_info = elf_section_data (s)->this_idx;
- break;
-
- case SHT_STRTAB:
- /* We assume that a section named .stab*str is a stabs
- string section. We look for a section with the same name
- but without the trailing ``str'', and set its sh_link
- field to point to this section. */
- if (strncmp (sec->name, ".stab", sizeof ".stab" - 1) == 0
- && strcmp (sec->name + strlen (sec->name) - 3, "str") == 0)
- {
- size_t len;
- char *alc;
-
- len = strlen (sec->name);
- alc = (char *) malloc (len - 2);
- if (alc == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- strncpy (alc, sec->name, len - 3);
- alc[len - 3] = '\0';
- s = bfd_get_section_by_name (abfd, alc);
- free (alc);
- if (s != NULL)
- {
- elf_section_data (s)->this_hdr.sh_link = d->this_idx;
+ if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
+ || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd)
+ != sizeof (*x_shdrp) * i_ehdrp->e_shnum))
+ return false;
- /* This is a .stab section. */
- elf_section_data (s)->this_hdr.sh_entsize =
- 4 + 2 * (ARCH_SIZE / 8);
- }
- }
- break;
-
- case SHT_DYNAMIC:
- case SHT_DYNSYM:
- /* sh_link is the section header index of the string table
- used for the dynamic entries or symbol table. */
- s = bfd_get_section_by_name (abfd, ".dynstr");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
- break;
-
- case SHT_HASH:
- /* sh_link is the section header index of the symbol table
- this hash table is for. */
- s = bfd_get_section_by_name (abfd, ".dynsym");
- if (s != NULL)
- d->this_hdr.sh_link = elf_section_data (s)->this_idx;
- break;
- }
- }
+ /* need to dump the string table too... */
return true;
}
-/* Map symbol from it's internal number to the external number, moving
- all local symbols to be at the head of the list. */
-
-static INLINE int
-sym_is_global (abfd, sym)
+static long
+elf_slurp_symbol_table (abfd, symptrs, dynamic)
bfd *abfd;
- asymbol *sym;
+ asymbol **symptrs; /* Buffer for generated bfd symbols */
+ boolean dynamic;
{
- /* If the backend has a special mapping, use it. */
- if (get_elf_backend_data (abfd)->elf_backend_sym_is_global)
- return ((*get_elf_backend_data (abfd)->elf_backend_sym_is_global)
- (abfd, sym));
-
- return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
- || bfd_is_und_section (bfd_get_section (sym))
- || bfd_is_com_section (bfd_get_section (sym)));
-}
+ Elf_Internal_Shdr *hdr;
+ long symcount; /* Number of external ELF symbols */
+ elf_symbol_type *sym; /* Pointer to current bfd symbol */
+ elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
+ Elf_Internal_Sym i_sym;
+ Elf_External_Sym *x_symp = NULL;
-static boolean
-elf_map_symbols (abfd)
- bfd *abfd;
-{
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- asymbol **sect_syms;
- int num_locals = 0;
- int num_globals = 0;
- int num_locals2 = 0;
- int num_globals2 = 0;
- int max_index = 0;
- int num_sections = 0;
- int idx;
- asection *asect;
- asymbol **new_syms;
+ /* Read each raw ELF symbol, converting from external ELF form to
+ internal ELF form, and then using the information to create a
+ canonical bfd symbol table entry.
-#ifdef DEBUG
- fprintf (stderr, "elf_map_symbols\n");
- fflush (stderr);
-#endif
+ Note that we allocate the initial bfd canonical symbol buffer
+ based on a one-to-one mapping of the ELF symbols to canonical
+ symbols. We actually use all the ELF symbols, so there will be no
+ space left over at the end. When we have all the symbols, we
+ build the caller's pointer vector. */
- /* Add a section symbol for each BFD section. FIXME: Is this really
- necessary? */
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (max_index < asect->index)
- max_index = asect->index;
- }
+ if (dynamic)
+ hdr = &elf_tdata (abfd)->dynsymtab_hdr;
+ else
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ return -1;
- max_index++;
- sect_syms = (asymbol **) bfd_zalloc (abfd, max_index * sizeof (asymbol *));
- if (sect_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- elf_section_syms (abfd) = sect_syms;
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- for (idx = 0; idx < symcount; idx++)
+ if (symcount == 0)
+ sym = symbase = NULL;
+ else
{
- if ((syms[idx]->flags & BSF_SECTION_SYM) != 0
- && syms[idx]->value == 0)
- {
- asection *sec;
+ long i;
- sec = syms[idx]->section;
- if (sec->owner != NULL)
- {
- if (sec->owner != abfd)
- {
- if (sec->output_offset != 0)
- continue;
- sec = sec->output_section;
- BFD_ASSERT (sec->owner == abfd);
- }
- sect_syms[sec->index] = syms[idx];
- }
- }
- }
-
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- asymbol *sym;
-
- if (sect_syms[asect->index] != NULL)
- continue;
-
- sym = bfd_make_empty_symbol (abfd);
- if (sym == NULL)
- return false;
- sym->the_bfd = abfd;
- sym->name = asect->name;
- sym->value = 0;
- /* Set the flags to 0 to indicate that this one was newly added. */
- sym->flags = 0;
- sym->section = asect;
- sect_syms[asect->index] = sym;
- num_sections++;
-#ifdef DEBUG
- fprintf (stderr,
- "creating section symbol, name = %s, value = 0x%.8lx, index = %d, section = 0x%.8lx\n",
- asect->name, (long) asect->vma, asect->index, (long) asect);
-#endif
- }
-
- /* Classify all of the symbols. */
- for (idx = 0; idx < symcount; idx++)
- {
- if (!sym_is_global (abfd, syms[idx]))
- num_locals++;
- else
- num_globals++;
- }
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (sect_syms[asect->index] != NULL
- && sect_syms[asect->index]->flags == 0)
- {
- sect_syms[asect->index]->flags = BSF_SECTION_SYM;
- if (!sym_is_global (abfd, sect_syms[asect->index]))
- num_locals++;
- else
- num_globals++;
- sect_syms[asect->index]->flags = 0;
- }
- }
-
- /* Now sort the symbols so the local symbols are first. */
- new_syms = ((asymbol **)
- bfd_alloc (abfd,
- (num_locals + num_globals) * sizeof (asymbol *)));
- if (new_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (idx = 0; idx < symcount; idx++)
- {
- asymbol *sym = syms[idx];
- int i;
-
- if (!sym_is_global (abfd, sym))
- i = num_locals2++;
- else
- i = num_locals + num_globals2++;
- new_syms[i] = sym;
- sym->udata.i = i + 1;
- }
- for (asect = abfd->sections; asect; asect = asect->next)
- {
- if (sect_syms[asect->index] != NULL
- && sect_syms[asect->index]->flags == 0)
- {
- asymbol *sym = sect_syms[asect->index];
- int i;
-
- sym->flags = BSF_SECTION_SYM;
- if (!sym_is_global (abfd, sym))
- i = num_locals2++;
- else
- i = num_locals + num_globals2++;
- new_syms[i] = sym;
- sym->udata.i = i + 1;
- }
- }
-
- bfd_set_symtab (abfd, new_syms, num_locals + num_globals);
-
- elf_num_locals (abfd) = num_locals;
- elf_num_globals (abfd) = num_globals;
- return true;
-}
-
-/* Compute the file positions we are going to put the sections at, and
- otherwise prepare to begin writing out the ELF file. If LINK_INFO
- is not NULL, this is being called by the ELF backend linker. */
-
-static boolean
-elf_compute_section_file_positions (abfd, link_info)
- bfd *abfd;
- struct bfd_link_info *link_info;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- boolean failed;
- struct bfd_strtab_hash *strtab;
- Elf_Internal_Shdr *shstrtab_hdr;
-
- if (abfd->output_has_begun)
- return true;
-
- /* Do any elf backend specific processing first. */
- if (bed->elf_backend_begin_write_processing)
- (*bed->elf_backend_begin_write_processing) (abfd, link_info);
-
- if (! prep_headers (abfd))
- return false;
-
- failed = false;
- bfd_map_over_sections (abfd, elf_fake_sections, &failed);
- if (failed)
- return false;
-
- if (!assign_section_numbers (abfd))
- return false;
-
- /* The backend linker builds symbol table information itself. */
- if (link_info == NULL)
- {
- if (! swap_out_syms (abfd, &strtab))
- return false;
- }
-
- shstrtab_hdr = &elf_tdata (abfd)->shstrtab_hdr;
- /* sh_name was set in prep_headers. */
- shstrtab_hdr->sh_type = SHT_STRTAB;
- shstrtab_hdr->sh_flags = 0;
- shstrtab_hdr->sh_addr = 0;
- shstrtab_hdr->sh_size = _bfd_stringtab_size (elf_shstrtab (abfd));
- shstrtab_hdr->sh_entsize = 0;
- shstrtab_hdr->sh_link = 0;
- shstrtab_hdr->sh_info = 0;
- /* sh_offset is set in assign_file_positions_for_symtabs_and_strtabs. */
- shstrtab_hdr->sh_addralign = 1;
-
- if (!assign_file_positions_except_relocs (abfd,
- link_info == NULL ? true : false))
- return false;
-
- if (link_info == NULL)
- {
- /* Now that we know where the .strtab section goes, write it
- out. */
- if ((bfd_seek (abfd, elf_tdata (abfd)->strtab_hdr.sh_offset, SEEK_SET)
- != 0)
- || ! _bfd_stringtab_emit (abfd, strtab))
- return false;
- _bfd_stringtab_free (strtab);
- }
-
- abfd->output_has_begun = true;
-
- return true;
-}
-
-
-/* Align to the maximum file alignment that could be required for any
- ELF data structure. */
-
-static INLINE file_ptr
-align_file_position (off)
- file_ptr off;
-{
- return (off + FILE_ALIGN - 1) & ~(FILE_ALIGN - 1);
-}
-
-/* Assign a file position to a section, optionally aligning to the
- required section alignment. */
-
-static INLINE file_ptr
-assign_file_position_for_section (i_shdrp, offset, align)
- Elf_Internal_Shdr *i_shdrp;
- file_ptr offset;
- boolean align;
-{
- if (align)
- {
- unsigned int al;
-
- al = i_shdrp->sh_addralign;
- if (al > 1)
- offset = BFD_ALIGN (offset, al);
- }
- i_shdrp->sh_offset = offset;
- if (i_shdrp->bfd_section != NULL)
- i_shdrp->bfd_section->filepos = offset;
- if (i_shdrp->sh_type != SHT_NOBITS)
- offset += i_shdrp->sh_size;
- return offset;
-}
-
-/* Get the size of the program header.
-
- SORTED_HDRS, if non-NULL, is an array of COUNT pointers to headers sorted
- by VMA. Non-allocated sections (!SHF_ALLOC) must appear last. All
- section VMAs and sizes are known so we can compute the correct value.
- (??? This may not be perfectly true. What cases do we miss?)
-
- If SORTED_HDRS is NULL we assume there are two segments: text and data
- (exclusive of .interp and .dynamic).
-
- If this is called by the linker before any of the section VMA's are set, it
- can't calculate the correct value for a strange memory layout. This only
- happens when SIZEOF_HEADERS is used in a linker script. In this case,
- SORTED_HDRS is NULL and we assume the normal scenario of one text and one
- data segment (exclusive of .interp and .dynamic).
-
- ??? User written scripts must either not use SIZEOF_HEADERS, or assume there
- will be two segments. */
-
-static bfd_size_type
-get_program_header_size (abfd, sorted_hdrs, count, maxpagesize)
- bfd *abfd;
- Elf_Internal_Shdr **sorted_hdrs;
- unsigned int count;
- bfd_vma maxpagesize;
-{
- size_t segs;
- asection *s;
-
- /* We can't return a different result each time we're called. */
- if (elf_tdata (abfd)->program_header_size != 0)
- return elf_tdata (abfd)->program_header_size;
-
- if (sorted_hdrs != NULL)
- {
- unsigned int i;
- unsigned int last_type;
- Elf_Internal_Shdr **hdrpp;
- /* What we think the current segment's offset is. */
- bfd_vma p_offset;
- /* What we think the current segment's address is. */
- bfd_vma p_vaddr;
- /* How big we think the current segment is. */
- bfd_vma p_memsz;
- /* What we think the current file offset is. */
- bfd_vma file_offset;
- bfd_vma next_offset;
-
- /* Scan the headers and compute the number of segments required. This
- code is intentionally similar to the code in map_program_segments.
-
- The `sh_offset' field isn't valid at this point, so we keep our own
- running total in `file_offset'.
-
- This works because section VMAs are already known. */
-
- segs = 1;
- /* Make sure the first section goes in the first segment. */
- file_offset = p_offset = sorted_hdrs[0]->sh_addr % maxpagesize;
- p_vaddr = sorted_hdrs[0]->sh_addr;
- p_memsz = 0;
- last_type = SHT_PROGBITS;
-
- for (i = 0, hdrpp = sorted_hdrs; i < count; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
-
- /* Ignore any section which will not be part of the process
- image. */
- if ((hdr->sh_flags & SHF_ALLOC) == 0)
- continue;
-
- /* Keep track of where this and the next sections go.
- The section VMA must equal the file position modulo
- the page size. */
- file_offset += (hdr->sh_addr - file_offset) % maxpagesize;
- next_offset = file_offset;
- if (hdr->sh_type != SHT_NOBITS)
- next_offset = file_offset + hdr->sh_size;
-
- /* If this section fits in the segment we are constructing, add
- it in. */
- if ((file_offset - (p_offset + p_memsz)
- == hdr->sh_addr - (p_vaddr + p_memsz))
- && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
- {
- bfd_size_type adjust;
-
- adjust = hdr->sh_addr - (p_vaddr + p_memsz);
- p_memsz += hdr->sh_size + adjust;
- file_offset = next_offset;
- last_type = hdr->sh_type;
- continue;
- }
-
- /* The section won't fit, start a new segment. */
- ++segs;
-
- /* Initialize the segment. */
- p_vaddr = hdr->sh_addr;
- p_memsz = hdr->sh_size;
- p_offset = file_offset;
- file_offset = next_offset;
-
- last_type = hdr->sh_type;
- }
- }
- else
- {
- /* Assume we will need exactly two PT_LOAD segments: one for text
- and one for data. */
- segs = 2;
- }
-
- s = bfd_get_section_by_name (abfd, ".interp");
- if (s != NULL && (s->flags & SEC_LOAD) != 0)
- {
- /* If we have a loadable interpreter section, we need a
- PT_INTERP segment. In this case, assume we also need a
- PT_PHDR segment, although that may not be true for all
- targets. */
- segs += 2;
- }
-
- if (bfd_get_section_by_name (abfd, ".dynamic") != NULL)
- {
- /* We need a PT_DYNAMIC segment. */
- ++segs;
- }
-
- elf_tdata (abfd)->program_header_size = segs * sizeof (Elf_External_Phdr);
- return elf_tdata (abfd)->program_header_size;
-}
-
-/* Create the program header. OFF is the file offset where the
- program header should be written. FIRST is the first loadable ELF
- section. SORTED_HDRS is the ELF sections sorted by section
- address. PHDR_SIZE is the size of the program header as returned
- by get_program_header_size. */
-
-static file_ptr
-map_program_segments (abfd, off, first, sorted_hdrs, phdr_size)
- bfd *abfd;
- file_ptr off;
- Elf_Internal_Shdr *first;
- Elf_Internal_Shdr **sorted_hdrs;
- bfd_size_type phdr_size;
-{
- Elf_Internal_Phdr phdrs[10];
- unsigned int phdr_count;
- Elf_Internal_Phdr *phdr;
- int phdr_size_adjust;
- unsigned int i;
- Elf_Internal_Shdr **hdrpp;
- asection *sinterp, *sdyn;
- unsigned int last_type;
- Elf_Internal_Ehdr *i_ehdrp;
-
- BFD_ASSERT ((abfd->flags & (EXEC_P | DYNAMIC)) != 0);
- BFD_ASSERT (phdr_size / sizeof (Elf_Internal_Phdr)
- <= sizeof phdrs / sizeof (phdrs[0]));
-
- phdr_count = 0;
- phdr = phdrs;
-
- phdr_size_adjust = 0;
-
- /* If we have a loadable .interp section, we must create a PT_INTERP
- segment which must precede all PT_LOAD segments. We assume that
- we must also create a PT_PHDR segment, although that may not be
- true for all targets. */
- sinterp = bfd_get_section_by_name (abfd, ".interp");
- if (sinterp != NULL && (sinterp->flags & SEC_LOAD) != 0)
- {
- BFD_ASSERT (first != NULL);
-
- phdr->p_type = PT_PHDR;
-
- phdr->p_offset = off;
-
- /* Account for any adjustment made because of the alignment of
- the first loadable section. */
- phdr_size_adjust = (first->sh_offset - phdr_size) - off;
- BFD_ASSERT (phdr_size_adjust >= 0 && phdr_size_adjust < 128);
-
- /* The program header precedes all loadable sections. This lets
- us compute its loadable address. This depends on the linker
- script. */
- phdr->p_vaddr = first->sh_addr - (phdr_size + phdr_size_adjust);
-
- phdr->p_paddr = 0;
- phdr->p_filesz = phdr_size;
- phdr->p_memsz = phdr_size;
-
- /* FIXME: UnixWare and Solaris set PF_X, Irix 5 does not. */
- phdr->p_flags = PF_R | PF_X;
-
- phdr->p_align = FILE_ALIGN;
- BFD_ASSERT ((phdr->p_vaddr - phdr->p_offset) % FILE_ALIGN == 0);
-
- /* Include the ELF header in the first loadable segment. */
- phdr_size_adjust += off;
-
- ++phdr_count;
- ++phdr;
-
- phdr->p_type = PT_INTERP;
- phdr->p_offset = sinterp->filepos;
- phdr->p_vaddr = sinterp->vma;
- phdr->p_paddr = 0;
- phdr->p_filesz = sinterp->_raw_size;
- phdr->p_memsz = sinterp->_raw_size;
- phdr->p_flags = PF_R;
- phdr->p_align = 1 << bfd_get_section_alignment (abfd, sinterp);
-
- ++phdr_count;
- ++phdr;
- }
-
- /* Look through the sections to see how they will be divided into
- program segments. The sections must be arranged in order by
- sh_addr for this to work correctly. */
- phdr->p_type = PT_NULL;
- last_type = SHT_PROGBITS;
- for (i = 1, hdrpp = sorted_hdrs;
- i < elf_elfheader (abfd)->e_shnum;
- i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
-
- /* Ignore any section which will not be part of the process
- image. */
- if ((hdr->sh_flags & SHF_ALLOC) == 0)
- continue;
-
- /* If this section fits in the segment we are constructing, add
- it in. */
- if (phdr->p_type != PT_NULL
- && (hdr->sh_offset - (phdr->p_offset + phdr->p_memsz)
- == hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz))
- && (last_type != SHT_NOBITS || hdr->sh_type == SHT_NOBITS))
- {
- bfd_size_type adjust;
-
- adjust = hdr->sh_addr - (phdr->p_vaddr + phdr->p_memsz);
- phdr->p_memsz += hdr->sh_size + adjust;
- if (hdr->sh_type != SHT_NOBITS)
- phdr->p_filesz += hdr->sh_size + adjust;
- if ((hdr->sh_flags & SHF_WRITE) != 0)
- phdr->p_flags |= PF_W;
- if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
- phdr->p_flags |= PF_X;
- last_type = hdr->sh_type;
- continue;
- }
-
- /* The section won't fit, start a new segment. If we're already in one,
- move to the next one. */
- if (phdr->p_type != PT_NULL)
- {
- ++phdr;
- ++phdr_count;
- }
-
- /* Initialize the segment. */
- phdr->p_type = PT_LOAD;
- phdr->p_offset = hdr->sh_offset;
- phdr->p_vaddr = hdr->sh_addr;
- phdr->p_paddr = 0;
- if (hdr->sh_type == SHT_NOBITS)
- phdr->p_filesz = 0;
- else
- phdr->p_filesz = hdr->sh_size;
- phdr->p_memsz = hdr->sh_size;
- phdr->p_flags = PF_R;
- if ((hdr->sh_flags & SHF_WRITE) != 0)
- phdr->p_flags |= PF_W;
- if ((hdr->sh_flags & SHF_EXECINSTR) != 0)
- phdr->p_flags |= PF_X;
- phdr->p_align = get_elf_backend_data (abfd)->maxpagesize;
-
- if (hdr == first
- && sinterp != NULL
- && (sinterp->flags & SEC_LOAD) != 0)
- {
- phdr->p_offset -= phdr_size + phdr_size_adjust;
- phdr->p_vaddr -= phdr_size + phdr_size_adjust;
- phdr->p_filesz += phdr_size + phdr_size_adjust;
- phdr->p_memsz += phdr_size + phdr_size_adjust;
- }
-
- last_type = hdr->sh_type;
- }
-
- if (phdr->p_type != PT_NULL)
- {
- ++phdr;
- ++phdr_count;
- }
-
- /* If we have a .dynamic section, create a PT_DYNAMIC segment. */
- sdyn = bfd_get_section_by_name (abfd, ".dynamic");
- if (sdyn != NULL && (sdyn->flags & SEC_LOAD) != 0)
- {
- phdr->p_type = PT_DYNAMIC;
- phdr->p_offset = sdyn->filepos;
- phdr->p_vaddr = sdyn->vma;
- phdr->p_paddr = 0;
- phdr->p_filesz = sdyn->_raw_size;
- phdr->p_memsz = sdyn->_raw_size;
- phdr->p_flags = PF_R;
- if ((sdyn->flags & SEC_READONLY) == 0)
- phdr->p_flags |= PF_W;
- if ((sdyn->flags & SEC_CODE) != 0)
- phdr->p_flags |= PF_X;
- phdr->p_align = 1 << bfd_get_section_alignment (abfd, sdyn);
-
- ++phdr;
- ++phdr_count;
- }
-
- /* Make sure the return value from get_program_header_size matches
- what we computed here. Actually, it's OK if we allocated too
- much space in the program header. */
- if (phdr_count > phdr_size / sizeof (Elf_External_Phdr))
- {
- ((*_bfd_error_handler)
- ("%s: Not enough room for program headers (allocated %lu, need %u)",
- bfd_get_filename (abfd),
- (unsigned long) (phdr_size / sizeof (Elf_External_Phdr)),
- phdr_count));
- bfd_set_error (bfd_error_bad_value);
- return (file_ptr) -1;
- }
-
- /* Set up program header information. */
- i_ehdrp = elf_elfheader (abfd);
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
- i_ehdrp->e_phoff = off;
- i_ehdrp->e_phnum = phdr_count;
-
- /* Save the program headers away. I don't think anybody uses this
- information right now. */
- elf_tdata (abfd)->phdr = ((Elf_Internal_Phdr *)
- bfd_alloc (abfd,
- (phdr_count
- * sizeof (Elf_Internal_Phdr))));
- if (elf_tdata (abfd)->phdr == NULL && phdr_count != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return (file_ptr) -1;
- }
- memcpy (elf_tdata (abfd)->phdr, phdrs,
- phdr_count * sizeof (Elf_Internal_Phdr));
-
- /* Write out the program headers. */
- if (bfd_seek (abfd, off, SEEK_SET) != 0)
- return (file_ptr) -1;
-
- for (i = 0, phdr = phdrs; i < phdr_count; i++, phdr++)
- {
- Elf_External_Phdr extphdr;
-
- elf_swap_phdr_out (abfd, phdr, &extphdr);
- if (bfd_write (&extphdr, sizeof (Elf_External_Phdr), 1, abfd)
- != sizeof (Elf_External_Phdr))
- return (file_ptr) -1;
- }
-
- return off + phdr_count * sizeof (Elf_External_Phdr);
-}
-
-/* Work out the file positions of all the sections. This is called by
- elf_compute_section_file_positions. All the section sizes and VMAs
- must be known before this is called.
-
- We do not consider reloc sections at this point, unless they form
- part of the loadable image. Reloc sections are assigned file
- positions in assign_file_positions_for_relocs, which is called by
- write_object_contents and final_link.
-
- If DOSYMS is false, we do not assign file positions for the symbol
- table or the string table. */
-
-static boolean
-assign_file_positions_except_relocs (abfd, dosyms)
- bfd *abfd;
- boolean dosyms;
-{
- struct elf_obj_tdata * const tdata = elf_tdata (abfd);
- Elf_Internal_Ehdr * const i_ehdrp = elf_elfheader (abfd);
- Elf_Internal_Shdr ** const i_shdrpp = elf_elfsections (abfd);
- file_ptr off;
-
- /* Start after the ELF header. */
- off = i_ehdrp->e_ehsize;
-
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- {
- Elf_Internal_Shdr **hdrpp;
- unsigned int i;
-
- /* We are not creating an executable, which means that we are
- not creating a program header, and that the actual order of
- the sections in the file is unimportant. */
- for (i = 1, hdrpp = i_shdrpp + 1; i < i_ehdrp->e_shnum; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
- if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
- {
- hdr->sh_offset = -1;
- continue;
- }
- if (! dosyms
- && (i == tdata->symtab_section
- || i == tdata->strtab_section))
- {
- hdr->sh_offset = -1;
- continue;
- }
-
- off = assign_file_position_for_section (hdr, off, true);
- }
- }
- else
- {
- file_ptr phdr_off;
- bfd_size_type phdr_size;
- bfd_vma maxpagesize;
- size_t hdrppsize;
- Elf_Internal_Shdr **sorted_hdrs;
- Elf_Internal_Shdr **hdrpp;
- unsigned int i;
- Elf_Internal_Shdr *first;
- file_ptr phdr_map;
-
- /* We are creating an executable. */
-
- maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
- if (maxpagesize == 0)
- maxpagesize = 1;
-
- /* We must sort the sections. The GNU linker will always create
- the sections in an appropriate order, but the Irix 5 linker
- will not. We don't include the dummy first section in the
- sort. We sort sections which are not SHF_ALLOC to the end. */
- hdrppsize = (i_ehdrp->e_shnum - 1) * sizeof (Elf_Internal_Shdr *);
- sorted_hdrs = (Elf_Internal_Shdr **) malloc (hdrppsize);
- if (sorted_hdrs == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- memcpy (sorted_hdrs, i_shdrpp + 1, hdrppsize);
- qsort (sorted_hdrs, i_ehdrp->e_shnum - 1, sizeof (Elf_Internal_Shdr *),
- elf_sort_hdrs);
-
- /* We can't actually create the program header until we have set the
- file positions for the sections, and we can't do that until we know
- how big the header is going to be. */
- off = align_file_position (off);
- phdr_size = get_program_header_size (abfd,
- sorted_hdrs, i_ehdrp->e_shnum - 1,
- maxpagesize);
- if (phdr_size == (file_ptr) -1)
- return false;
-
- /* Compute the file offsets of each section. */
- phdr_off = off;
- off += phdr_size;
- first = NULL;
- for (i = 1, hdrpp = sorted_hdrs; i < i_ehdrp->e_shnum; i++, hdrpp++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = *hdrpp;
- if ((hdr->sh_flags & SHF_ALLOC) == 0)
- {
- if (hdr->sh_type == SHT_REL || hdr->sh_type == SHT_RELA)
- {
- hdr->sh_offset = -1;
- continue;
- }
- if (! dosyms
- && (hdr == i_shdrpp[tdata->symtab_section]
- || hdr == i_shdrpp[tdata->strtab_section]))
- {
- hdr->sh_offset = -1;
- continue;
- }
- }
- else
- {
- if (first == NULL)
- first = hdr;
-
- /* The section VMA must equal the file position modulo
- the page size. This is required by the program
- header. */
- off += (hdr->sh_addr - off) % maxpagesize;
- }
-
- off = assign_file_position_for_section (hdr, off, false);
- }
-
- /* Create the program header. */
- phdr_map = map_program_segments (abfd, phdr_off, first, sorted_hdrs,
- phdr_size);
- if (phdr_map == (file_ptr) -1)
- return false;
- BFD_ASSERT ((bfd_size_type) phdr_map <= (bfd_size_type) phdr_off + phdr_size);
-
- free (sorted_hdrs);
- }
-
- /* Place the section headers. */
- off = align_file_position (off);
- i_ehdrp->e_shoff = off;
- off += i_ehdrp->e_shnum * i_ehdrp->e_shentsize;
-
- elf_tdata (abfd)->next_file_pos = off;
-
- return true;
-}
-
-/* Sort the ELF headers by VMA. We sort headers which are not
- SHF_ALLOC to the end. */
-
-
-static int
-elf_sort_hdrs (arg1, arg2)
- const PTR arg1;
- const PTR arg2;
-{
- int ret;
- const Elf_Internal_Shdr *hdr1 = *(const Elf_Internal_Shdr **) arg1;
- const Elf_Internal_Shdr *hdr2 = *(const Elf_Internal_Shdr **) arg2;
-
-#define TOEND(x) (((x)->sh_flags & SHF_ALLOC)==0)
-
- if (TOEND (hdr1))
- if (TOEND (hdr2))
- return 0;
- else
- return 1;
-
- if (TOEND (hdr2))
- return -1;
-
- if (hdr1->sh_addr < hdr2->sh_addr)
- return -1;
- else if (hdr1->sh_addr > hdr2->sh_addr)
- return 1;
-
- /* Put !SHT_NOBITS sections before SHT_NOBITS ones.
- The main loop in map_program_segments requires this. */
-
- ret = (hdr1->sh_type == SHT_NOBITS) - (hdr2->sh_type == SHT_NOBITS);
-
- if (ret != 0)
- return ret;
- if (hdr1->sh_size < hdr2->sh_size)
- return -1;
- if (hdr1->sh_size > hdr2->sh_size)
- return 1;
- return 0;
-}
-
-
-
-static boolean
-prep_headers (abfd)
- bfd *abfd;
-{
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_Internal_Phdr *i_phdrp = 0; /* Program header table, internal form */
- Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
- int count;
- struct bfd_strtab_hash *shstrtab;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- shstrtab = elf_stringtab_init ();
- if (shstrtab == NULL)
- return false;
-
- elf_shstrtab (abfd) = shstrtab;
-
- i_ehdrp->e_ident[EI_MAG0] = ELFMAG0;
- i_ehdrp->e_ident[EI_MAG1] = ELFMAG1;
- i_ehdrp->e_ident[EI_MAG2] = ELFMAG2;
- i_ehdrp->e_ident[EI_MAG3] = ELFMAG3;
-
- i_ehdrp->e_ident[EI_CLASS] = ELFCLASS;
- i_ehdrp->e_ident[EI_DATA] =
- abfd->xvec->byteorder_big_p ? ELFDATA2MSB : ELFDATA2LSB;
- i_ehdrp->e_ident[EI_VERSION] = EV_CURRENT;
-
- for (count = EI_PAD; count < EI_NIDENT; count++)
- i_ehdrp->e_ident[count] = 0;
-
- if ((abfd->flags & DYNAMIC) != 0)
- i_ehdrp->e_type = ET_DYN;
- else if ((abfd->flags & EXEC_P) != 0)
- i_ehdrp->e_type = ET_EXEC;
- else
- i_ehdrp->e_type = ET_REL;
-
- switch (bfd_get_arch (abfd))
- {
- case bfd_arch_unknown:
- i_ehdrp->e_machine = EM_NONE;
- break;
- case bfd_arch_sparc:
-#if ARCH_SIZE == 64
- i_ehdrp->e_machine = EM_SPARC64;
-#else
- i_ehdrp->e_machine = EM_SPARC;
-#endif
- break;
- case bfd_arch_i386:
- i_ehdrp->e_machine = EM_386;
- break;
- case bfd_arch_m68k:
- i_ehdrp->e_machine = EM_68K;
- break;
- case bfd_arch_m88k:
- i_ehdrp->e_machine = EM_88K;
- break;
- case bfd_arch_i860:
- i_ehdrp->e_machine = EM_860;
- break;
- case bfd_arch_mips: /* MIPS Rxxxx */
- i_ehdrp->e_machine = EM_MIPS; /* only MIPS R3000 */
- break;
- case bfd_arch_hppa:
- i_ehdrp->e_machine = EM_PARISC;
- break;
- case bfd_arch_powerpc:
- i_ehdrp->e_machine = EM_PPC;
- break;
-/* start-sanitize-arc */
- case bfd_arch_arc:
- i_ehdrp->e_machine = EM_CYGNUS_ARC;
- break;
-/* end-sanitize-arc */
- /* also note that EM_M32, AT&T WE32100 is unknown to bfd */
- default:
- i_ehdrp->e_machine = EM_NONE;
- }
- i_ehdrp->e_version = EV_CURRENT;
- i_ehdrp->e_ehsize = sizeof (Elf_External_Ehdr);
-
- /* no program header, for now. */
- i_ehdrp->e_phoff = 0;
- i_ehdrp->e_phentsize = 0;
- i_ehdrp->e_phnum = 0;
-
- /* each bfd section is section header entry */
- i_ehdrp->e_entry = bfd_get_start_address (abfd);
- i_ehdrp->e_shentsize = sizeof (Elf_External_Shdr);
-
- /* if we're building an executable, we'll need a program header table */
- if (abfd->flags & EXEC_P)
- {
- /* it all happens later */
-#if 0
- i_ehdrp->e_phentsize = sizeof (Elf_External_Phdr);
-
- /* elf_build_phdrs() returns a (NULL-terminated) array of
- Elf_Internal_Phdrs */
- i_phdrp = elf_build_phdrs (abfd, i_ehdrp, i_shdrp, &i_ehdrp->e_phnum);
- i_ehdrp->e_phoff = outbase;
- outbase += i_ehdrp->e_phentsize * i_ehdrp->e_phnum;
-#endif
- }
- else
- {
- i_ehdrp->e_phentsize = 0;
- i_phdrp = 0;
- i_ehdrp->e_phoff = 0;
- }
-
- elf_tdata (abfd)->symtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".symtab", true, false);
- elf_tdata (abfd)->strtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".strtab", true, false);
- elf_tdata (abfd)->shstrtab_hdr.sh_name =
- (unsigned int) _bfd_stringtab_add (shstrtab, ".shstrtab", true, false);
- if (elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
- || elf_tdata (abfd)->symtab_hdr.sh_name == (unsigned int) -1
- || elf_tdata (abfd)->shstrtab_hdr.sh_name == (unsigned int) -1)
- return false;
-
- return true;
-}
-
-static boolean
-swap_out_syms (abfd, sttp)
- bfd *abfd;
- struct bfd_strtab_hash **sttp;
-{
- if (!elf_map_symbols (abfd))
- return false;
-
- /* Dump out the symtabs. */
- {
- int symcount = bfd_get_symcount (abfd);
- asymbol **syms = bfd_get_outsymbols (abfd);
- struct bfd_strtab_hash *stt;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- Elf_External_Sym *outbound_syms;
- int idx;
-
- stt = elf_stringtab_init ();
- if (stt == NULL)
- return false;
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
- symtab_hdr->sh_size = symtab_hdr->sh_entsize * (symcount + 1);
- symtab_hdr->sh_info = elf_num_locals (abfd) + 1;
- symtab_hdr->sh_addralign = FILE_ALIGN;
-
- symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
- symstrtab_hdr->sh_type = SHT_STRTAB;
-
- outbound_syms = ((Elf_External_Sym *)
- bfd_alloc (abfd,
- (1 + symcount) * sizeof (Elf_External_Sym)));
- if (outbound_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- symtab_hdr->contents = (PTR) outbound_syms;
-
- /* now generate the data (for "contents") */
- {
- /* Fill in zeroth symbol and swap it out. */
- Elf_Internal_Sym sym;
- sym.st_name = 0;
- sym.st_value = 0;
- sym.st_size = 0;
- sym.st_info = 0;
- sym.st_other = 0;
- sym.st_shndx = SHN_UNDEF;
- elf_swap_symbol_out (abfd, &sym, outbound_syms);
- ++outbound_syms;
- }
- for (idx = 0; idx < symcount; idx++)
- {
- Elf_Internal_Sym sym;
- bfd_vma value = syms[idx]->value;
- elf_symbol_type *type_ptr;
- flagword flags = syms[idx]->flags;
-
- if (flags & BSF_SECTION_SYM)
- /* Section symbols have no names. */
- sym.st_name = 0;
- else
- {
- sym.st_name = (unsigned long) _bfd_stringtab_add (stt,
- syms[idx]->name,
- true, false);
- if (sym.st_name == (unsigned long) -1)
- return false;
- }
-
- type_ptr = elf_symbol_from (abfd, syms[idx]);
-
- if (bfd_is_com_section (syms[idx]->section))
- {
- /* ELF common symbols put the alignment into the `value' field,
- and the size into the `size' field. This is backwards from
- how BFD handles it, so reverse it here. */
- sym.st_size = value;
- if (type_ptr == NULL
- || type_ptr->internal_elf_sym.st_value == 0)
- sym.st_value = value >= 16 ? 16 : (1 << bfd_log2 (value));
- else
- sym.st_value = type_ptr->internal_elf_sym.st_value;
- sym.st_shndx = elf_section_from_bfd_section (abfd,
- syms[idx]->section);
- }
- else
- {
- asection *sec = syms[idx]->section;
- int shndx;
-
- if (sec->output_section)
- {
- value += sec->output_offset;
- sec = sec->output_section;
- }
- value += sec->vma;
- sym.st_value = value;
- sym.st_size = type_ptr ? type_ptr->internal_elf_sym.st_size : 0;
- sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec);
- if (shndx == -1)
- {
- asection *sec2;
- /* Writing this would be a hell of a lot easier if we had
- some decent documentation on bfd, and knew what to expect
- of the library, and what to demand of applications. For
- example, it appears that `objcopy' might not set the
- section of a symbol to be a section that is actually in
- the output file. */
- sec2 = bfd_get_section_by_name (abfd, sec->name);
- BFD_ASSERT (sec2 != 0);
- sym.st_shndx = shndx = elf_section_from_bfd_section (abfd, sec2);
- BFD_ASSERT (shndx != -1);
- }
- }
-
- if (bfd_is_com_section (syms[idx]->section))
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, STT_OBJECT);
- else if (bfd_is_und_section (syms[idx]->section))
- sym.st_info = ELF_ST_INFO (((flags & BSF_WEAK)
- ? STB_WEAK
- : STB_GLOBAL),
- ((flags & BSF_FUNCTION)
- ? STT_FUNC
- : STT_NOTYPE));
- else if (flags & BSF_SECTION_SYM)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- else if (flags & BSF_FILE)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- else
- {
- int bind = STB_LOCAL;
- int type = STT_OBJECT;
-
- if (flags & BSF_LOCAL)
- bind = STB_LOCAL;
- else if (flags & BSF_WEAK)
- bind = STB_WEAK;
- else if (flags & BSF_GLOBAL)
- bind = STB_GLOBAL;
-
- if (flags & BSF_FUNCTION)
- type = STT_FUNC;
-
- sym.st_info = ELF_ST_INFO (bind, type);
- }
-
- sym.st_other = 0;
- elf_swap_symbol_out (abfd, &sym, outbound_syms);
- ++outbound_syms;
- }
-
- *sttp = stt;
- symstrtab_hdr->sh_size = _bfd_stringtab_size (stt);
- symstrtab_hdr->sh_type = SHT_STRTAB;
-
- symstrtab_hdr->sh_flags = 0;
- symstrtab_hdr->sh_addr = 0;
- symstrtab_hdr->sh_entsize = 0;
- symstrtab_hdr->sh_link = 0;
- symstrtab_hdr->sh_info = 0;
- symstrtab_hdr->sh_addralign = 1;
- }
-
- return true;
-}
-
-static boolean
-write_shdrs_and_ehdr (abfd)
- bfd *abfd;
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Shdr *x_shdrp; /* Section header table, external form */
- Elf_Internal_Shdr **i_shdrp; /* Section header table, internal form */
- unsigned int count;
-
- i_ehdrp = elf_elfheader (abfd);
- i_shdrp = elf_elfsections (abfd);
-
- /* swap the header before spitting it out... */
-
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
- elf_swap_ehdr_out (abfd, i_ehdrp, &x_ehdr);
- if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
- || (bfd_write ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd)
- != sizeof (x_ehdr)))
- return false;
-
- /* at this point we've concocted all the ELF sections... */
- x_shdrp = (Elf_External_Shdr *)
- bfd_alloc (abfd, sizeof (*x_shdrp) * (i_ehdrp->e_shnum));
- if (!x_shdrp)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- for (count = 0; count < i_ehdrp->e_shnum; count++)
- {
-#if DEBUG & 2
- elf_debug_section (count, i_shdrp[count]);
-#endif
- elf_swap_shdr_out (abfd, i_shdrp[count], x_shdrp + count);
- }
- if (bfd_seek (abfd, (file_ptr) i_ehdrp->e_shoff, SEEK_SET) != 0
- || (bfd_write ((PTR) x_shdrp, sizeof (*x_shdrp), i_ehdrp->e_shnum, abfd)
- != sizeof (*x_shdrp) * i_ehdrp->e_shnum))
- return false;
-
- /* need to dump the string table too... */
-
- return true;
-}
-
-/* Assign file positions for all the reloc sections which are not part
- of the loadable file image. */
-
-static void
-assign_file_positions_for_relocs (abfd)
- bfd *abfd;
-{
- file_ptr off;
- unsigned int i;
- Elf_Internal_Shdr **shdrpp;
-
- off = elf_tdata (abfd)->next_file_pos;
-
- for (i = 1, shdrpp = elf_elfsections (abfd) + 1;
- i < elf_elfheader (abfd)->e_shnum;
- i++, shdrpp++)
- {
- Elf_Internal_Shdr *shdrp;
-
- shdrp = *shdrpp;
- if ((shdrp->sh_type == SHT_REL || shdrp->sh_type == SHT_RELA)
- && shdrp->sh_offset == -1)
- off = assign_file_position_for_section (shdrp, off, true);
- }
-
- elf_tdata (abfd)->next_file_pos = off;
-}
-
-boolean
-NAME(bfd_elf,write_object_contents) (abfd)
- bfd *abfd;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- Elf_Internal_Ehdr *i_ehdrp;
- Elf_Internal_Shdr **i_shdrp;
- boolean failed;
- unsigned int count;
-
- if (! abfd->output_has_begun
- && ! elf_compute_section_file_positions (abfd,
- (struct bfd_link_info *) NULL))
- return false;
-
- i_shdrp = elf_elfsections (abfd);
- i_ehdrp = elf_elfheader (abfd);
-
- failed = false;
- bfd_map_over_sections (abfd, write_relocs, &failed);
- if (failed)
- return false;
- assign_file_positions_for_relocs (abfd);
-
- /* After writing the headers, we need to write the sections too... */
- for (count = 1; count < i_ehdrp->e_shnum; count++)
- {
- if (bed->elf_backend_section_processing)
- (*bed->elf_backend_section_processing) (abfd, i_shdrp[count]);
- if (i_shdrp[count]->contents)
- {
- if (bfd_seek (abfd, i_shdrp[count]->sh_offset, SEEK_SET) != 0
- || (bfd_write (i_shdrp[count]->contents, i_shdrp[count]->sh_size,
- 1, abfd)
- != i_shdrp[count]->sh_size))
- return false;
- }
- }
-
- /* Write out the section header names. */
- if (bfd_seek (abfd, elf_tdata (abfd)->shstrtab_hdr.sh_offset, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd, elf_shstrtab (abfd)))
- return false;
-
- if (bed->elf_backend_final_write_processing)
- (*bed->elf_backend_final_write_processing) (abfd,
- elf_tdata (abfd)->linker);
-
- return write_shdrs_and_ehdr (abfd);
-}
-
-/* Given an ELF section number, retrieve the corresponding BFD
- section. */
-
-static asection *
-section_from_elf_index (abfd, index)
- bfd *abfd;
- unsigned int index;
-{
- BFD_ASSERT (index > 0 && index < SHN_LORESERVE);
- if (index >= elf_elfheader (abfd)->e_shnum)
- return NULL;
- return elf_elfsections (abfd)[index]->bfd_section;
-}
-
-/* given a section, search the header to find them... */
-static int
-elf_section_from_bfd_section (abfd, asect)
- bfd *abfd;
- struct sec *asect;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- Elf_Internal_Shdr **i_shdrp = elf_elfsections (abfd);
- int index;
- Elf_Internal_Shdr *hdr;
- int maxindex = elf_elfheader (abfd)->e_shnum;
-
- for (index = 0; index < maxindex; index++)
- {
- hdr = i_shdrp[index];
- if (hdr->bfd_section == asect)
- return index;
- }
-
- if (bed->elf_backend_section_from_bfd_section)
- {
- for (index = 0; index < maxindex; index++)
- {
- int retval;
-
- hdr = i_shdrp[index];
- retval = index;
- if ((*bed->elf_backend_section_from_bfd_section)
- (abfd, hdr, asect, &retval))
- return retval;
- }
- }
-
- if (bfd_is_abs_section (asect))
- return SHN_ABS;
- if (bfd_is_com_section (asect))
- return SHN_COMMON;
- if (bfd_is_und_section (asect))
- return SHN_UNDEF;
-
- return -1;
-}
-
-/* given a symbol, return the bfd index for that symbol. */
-static int
-elf_symbol_from_bfd_symbol (abfd, asym_ptr_ptr)
- bfd *abfd;
- struct symbol_cache_entry **asym_ptr_ptr;
-{
- struct symbol_cache_entry *asym_ptr = *asym_ptr_ptr;
- int idx;
- flagword flags = asym_ptr->flags;
-
- /* When gas creates relocations against local labels, it creates its
- own symbol for the section, but does put the symbol into the
- symbol chain, so udata is 0. When the linker is generating
- relocatable output, this section symbol may be for one of the
- input sections rather than the output section. */
- if (asym_ptr->udata.i == 0
- && (flags & BSF_SECTION_SYM)
- && asym_ptr->section)
- {
- int indx;
-
- if (asym_ptr->section->output_section != NULL)
- indx = asym_ptr->section->output_section->index;
- else
- indx = asym_ptr->section->index;
- if (elf_section_syms (abfd)[indx])
- asym_ptr->udata.i = elf_section_syms (abfd)[indx]->udata.i;
- }
-
- idx = asym_ptr->udata.i;
- BFD_ASSERT (idx != 0);
-
-#if DEBUG & 4
- {
-
- fprintf (stderr,
- "elf_symbol_from_bfd_symbol 0x%.8lx, name = %s, sym num = %d, flags = 0x%.8lx%s\n",
- (long) asym_ptr, asym_ptr->name, idx, flags, elf_symbol_flags (flags));
- fflush (stderr);
- }
-#endif
-
- return idx;
-}
-
-static long
-elf_slurp_symbol_table (abfd, symptrs, dynamic)
- bfd *abfd;
- asymbol **symptrs; /* Buffer for generated bfd symbols */
- boolean dynamic;
-{
- Elf_Internal_Shdr *hdr;
- long symcount; /* Number of external ELF symbols */
- elf_symbol_type *sym; /* Pointer to current bfd symbol */
- elf_symbol_type *symbase; /* Buffer for generated bfd symbols */
- Elf_Internal_Sym i_sym;
- Elf_External_Sym *x_symp = NULL;
-
- /* Read each raw ELF symbol, converting from external ELF form to
- internal ELF form, and then using the information to create a
- canonical bfd symbol table entry.
-
- Note that we allocate the initial bfd canonical symbol buffer
- based on a one-to-one mapping of the ELF symbols to canonical
- symbols. We actually use all the ELF symbols, so there will be no
- space left over at the end. When we have all the symbols, we
- build the caller's pointer vector. */
-
- if (dynamic)
- hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- else
- hdr = &elf_tdata (abfd)->symtab_hdr;
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
- return -1;
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- if (symcount == 0)
- sym = symbase = NULL;
- else
- {
- long i;
-
- if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
- return -1;
-
- symbase = ((elf_symbol_type *)
- bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
- if (symbase == (elf_symbol_type *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return -1;
- }
- sym = symbase;
-
- /* Temporarily allocate room for the raw ELF symbols. */
- x_symp = ((Elf_External_Sym *)
- malloc (symcount * sizeof (Elf_External_Sym)));
- if (x_symp == NULL && symcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
- != symcount * sizeof (Elf_External_Sym))
- goto error_return;
- /* Skip first symbol, which is a null dummy. */
- for (i = 1; i < symcount; i++)
- {
- elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
- memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
-#ifdef ELF_KEEP_EXTSYM
- memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
-#endif
- sym->symbol.the_bfd = abfd;
-
- sym->symbol.name = elf_string_from_elf_section (abfd, hdr->sh_link,
- i_sym.st_name);
-
- sym->symbol.value = i_sym.st_value;
-
- if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE)
- {
- sym->symbol.section = section_from_elf_index (abfd,
- i_sym.st_shndx);
- if (sym->symbol.section == NULL)
- {
- /* This symbol is in a section for which we did not
- create a BFD section. Just use bfd_abs_section,
- although it is wrong. FIXME. */
- sym->symbol.section = bfd_abs_section_ptr;
- }
- }
- else if (i_sym.st_shndx == SHN_ABS)
- {
- sym->symbol.section = bfd_abs_section_ptr;
- }
- else if (i_sym.st_shndx == SHN_COMMON)
- {
- sym->symbol.section = bfd_com_section_ptr;
- /* Elf puts the alignment into the `value' field, and
- the size into the `size' field. BFD wants to see the
- size in the value field, and doesn't care (at the
- moment) about the alignment. */
- sym->symbol.value = i_sym.st_size;
- }
- else if (i_sym.st_shndx == SHN_UNDEF)
- {
- sym->symbol.section = bfd_und_section_ptr;
- }
- else
- sym->symbol.section = bfd_abs_section_ptr;
-
- sym->symbol.value -= sym->symbol.section->vma;
-
- switch (ELF_ST_BIND (i_sym.st_info))
- {
- case STB_LOCAL:
- sym->symbol.flags |= BSF_LOCAL;
- break;
- case STB_GLOBAL:
- if (i_sym.st_shndx != SHN_UNDEF
- && i_sym.st_shndx != SHN_COMMON)
- sym->symbol.flags |= BSF_GLOBAL;
- break;
- case STB_WEAK:
- sym->symbol.flags |= BSF_WEAK;
- break;
- }
-
- switch (ELF_ST_TYPE (i_sym.st_info))
- {
- case STT_SECTION:
- sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
- break;
- case STT_FILE:
- sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
- break;
- case STT_FUNC:
- sym->symbol.flags |= BSF_FUNCTION;
- break;
- }
-
- if (dynamic)
- sym->symbol.flags |= BSF_DYNAMIC;
-
- /* Do some backend-specific processing on this symbol. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_processing)
- (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
- }
-
- sym++;
- }
- }
-
- /* Do some backend-specific processing on this symbol table. */
- {
- struct elf_backend_data *ebd = get_elf_backend_data (abfd);
- if (ebd->elf_backend_symbol_table_processing)
- (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
- }
-
- /* We rely on the zalloc to clear out the final symbol entry. */
-
- symcount = sym - symbase;
-
- /* Fill in the user's symbol pointer vector if needed. */
- if (symptrs)
- {
- long l = symcount;
-
- sym = symbase;
- while (l-- > 0)
- {
- *symptrs++ = &sym->symbol;
- sym++;
- }
- *symptrs = 0; /* Final null pointer */
- }
-
- if (x_symp != NULL)
- free (x_symp);
- return symcount;
-error_return:
- if (x_symp != NULL)
- free (x_symp);
- return -1;
-}
-
-/* Return the number of bytes required to hold the symtab vector.
-
- Note that we base it on the count plus 1, since we will null terminate
- the vector allocated based on this size. However, the ELF symbol table
- always has a dummy entry as symbol #0, so it ends up even. */
-
-long
-elf_get_symtab_upper_bound (abfd)
- bfd *abfd;
-{
- long symcount;
- long symtab_size;
- Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->symtab_hdr;
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
-
- return symtab_size;
-}
-
-long
-elf_get_dynamic_symtab_upper_bound (abfd)
- bfd *abfd;
-{
- long symcount;
- long symtab_size;
- Elf_Internal_Shdr *hdr = &elf_tdata (abfd)->dynsymtab_hdr;
-
- if (elf_dynsymtab (abfd) == 0)
- {
- bfd_set_error (bfd_error_invalid_operation);
- return -1;
- }
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
- symtab_size = (symcount - 1 + 1) * (sizeof (asymbol *));
-
- return symtab_size;
-}
-
-long
-elf_get_reloc_upper_bound (abfd, asect)
- bfd *abfd;
- sec_ptr asect;
-{
- return (asect->reloc_count + 1) * sizeof (arelent *);
-}
-
-/* Read in and swap the external relocs. */
-
-static boolean
-elf_slurp_reloc_table (abfd, asect, symbols)
- bfd *abfd;
- asection *asect;
- asymbol **symbols;
-{
- struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
- struct bfd_elf_section_data * const d = elf_section_data (asect);
- PTR allocated = NULL;
- bfd_byte *native_relocs;
- arelent *relents;
- arelent *relent;
- unsigned int i;
- int entsize;
-
- if (asect->relocation != NULL
- || (asect->flags & SEC_RELOC) == 0
- || asect->reloc_count == 0)
- return true;
-
- BFD_ASSERT (asect->rel_filepos == d->rel_hdr.sh_offset
- && (asect->reloc_count
- == d->rel_hdr.sh_size / d->rel_hdr.sh_entsize));
-
- allocated = (PTR) malloc (d->rel_hdr.sh_size);
- if (allocated == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0
- || (bfd_read (allocated, 1, d->rel_hdr.sh_size, abfd)
- != d->rel_hdr.sh_size))
- goto error_return;
-
- native_relocs = (bfd_byte *) allocated;
-
- relents = ((arelent *)
- bfd_alloc (abfd, asect->reloc_count * sizeof (arelent)));
- if (relents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- entsize = d->rel_hdr.sh_entsize;
- BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
- || entsize == sizeof (Elf_External_Rela));
-
- for (i = 0, relent = relents;
- i < asect->reloc_count;
- i++, relent++, native_relocs += entsize)
- {
- Elf_Internal_Rela rela;
- Elf_Internal_Rel rel;
-
- if (entsize == sizeof (Elf_External_Rela))
- elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
- else
- {
- elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
- rela.r_offset = rel.r_offset;
- rela.r_info = rel.r_info;
- rela.r_addend = 0;
- }
-
- /* The address of an ELF reloc is section relative for an object
- file, and absolute for an executable file or shared library.
- The address of a BFD reloc is always section relative. */
- if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
- relent->address = rela.r_offset;
- else
- relent->address = rela.r_offset - asect->vma;
-
- if (ELF_R_SYM (rela.r_info) == 0)
- relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
- else
- {
- asymbol **ps, *s;
-
- ps = symbols + ELF_R_SYM (rela.r_info) - 1;
- s = *ps;
-
- /* Canonicalize ELF section symbols. FIXME: Why? */
- if ((s->flags & BSF_SECTION_SYM) == 0)
- relent->sym_ptr_ptr = ps;
- else
- relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
- }
-
- relent->addend = rela.r_addend;
-
- if (entsize == sizeof (Elf_External_Rela))
- (*ebd->elf_info_to_howto) (abfd, relent, &rela);
- else
- (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
- }
-
- asect->relocation = relents;
-
- if (allocated != NULL)
- free (allocated);
-
- return true;
-
- error_return:
- if (allocated != NULL)
- free (allocated);
- return false;
-}
-
-#ifdef DEBUG
-static void
-elf_debug_section (num, hdr)
- int num;
- Elf_Internal_Shdr *hdr;
-{
- fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
- hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
- (long) hdr);
- fprintf (stderr,
- "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
- (long) hdr->sh_name,
- (long) hdr->sh_type,
- (long) hdr->sh_flags);
- fprintf (stderr,
- "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
- (long) hdr->sh_addr,
- (long) hdr->sh_offset,
- (long) hdr->sh_size);
- fprintf (stderr,
- "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
- (long) hdr->sh_link,
- (long) hdr->sh_info,
- (long) hdr->sh_addralign);
- fprintf (stderr, "sh_entsize = %ld\n",
- (long) hdr->sh_entsize);
- fflush (stderr);
-}
-
-static void
-elf_debug_file (ehdrp)
- Elf_Internal_Ehdr *ehdrp;
-{
- fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
- fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
- fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
- fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
- fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
- fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
- fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
-}
-
-static char *
-elf_symbol_flags (flags)
- flagword flags;
-{
- static char buffer[1024];
-
- buffer[0] = '\0';
- if (flags & BSF_LOCAL)
- strcat (buffer, " local");
-
- if (flags & BSF_GLOBAL)
- strcat (buffer, " global");
-
- if (flags & BSF_DEBUGGING)
- strcat (buffer, " debug");
-
- if (flags & BSF_FUNCTION)
- strcat (buffer, " function");
-
- if (flags & BSF_KEEP)
- strcat (buffer, " keep");
-
- if (flags & BSF_KEEP_G)
- strcat (buffer, " keep_g");
-
- if (flags & BSF_WEAK)
- strcat (buffer, " weak");
-
- if (flags & BSF_SECTION_SYM)
- strcat (buffer, " section-sym");
-
- if (flags & BSF_OLD_COMMON)
- strcat (buffer, " old-common");
-
- if (flags & BSF_NOT_AT_END)
- strcat (buffer, " not-at-end");
-
- if (flags & BSF_CONSTRUCTOR)
- strcat (buffer, " constructor");
-
- if (flags & BSF_WARNING)
- strcat (buffer, " warning");
-
- if (flags & BSF_INDIRECT)
- strcat (buffer, " indirect");
-
- if (flags & BSF_FILE)
- strcat (buffer, " file");
-
- if (flags & DYNAMIC)
- strcat (buffer, " dynamic");
-
- if (flags & ~(BSF_LOCAL
- | BSF_GLOBAL
- | BSF_DEBUGGING
- | BSF_FUNCTION
- | BSF_KEEP
- | BSF_KEEP_G
- | BSF_WEAK
- | BSF_SECTION_SYM
- | BSF_OLD_COMMON
- | BSF_NOT_AT_END
- | BSF_CONSTRUCTOR
- | BSF_WARNING
- | BSF_INDIRECT
- | BSF_FILE
- | BSF_DYNAMIC))
- strcat (buffer, " unknown-bits");
-
- return buffer;
-}
-#endif
-
-/* Canonicalize the relocs. */
-
-long
-elf_canonicalize_reloc (abfd, section, relptr, symbols)
- bfd *abfd;
- sec_ptr section;
- arelent **relptr;
- asymbol **symbols;
-{
- arelent *tblptr;
- unsigned int i;
-
- if (! elf_slurp_reloc_table (abfd, section, symbols))
- return -1;
-
- tblptr = section->relocation;
- for (i = 0; i < section->reloc_count; i++)
- *relptr++ = tblptr++;
-
- *relptr = NULL;
-
- return section->reloc_count;
-}
-
-long
-elf_get_symtab (abfd, alocation)
- bfd *abfd;
- asymbol **alocation;
-{
- long symcount = elf_slurp_symbol_table (abfd, alocation, false);
-
- if (symcount >= 0)
- bfd_get_symcount (abfd) = symcount;
- return symcount;
-}
-
-long
-elf_canonicalize_dynamic_symtab (abfd, alocation)
- bfd *abfd;
- asymbol **alocation;
-{
- return elf_slurp_symbol_table (abfd, alocation, true);
-}
-
-asymbol *
-elf_make_empty_symbol (abfd)
- bfd *abfd;
-{
- elf_symbol_type *newsym;
-
- newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (elf_symbol_type));
- if (!newsym)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- else
- {
- newsym->symbol.the_bfd = abfd;
- return &newsym->symbol;
- }
-}
-
-void
-elf_get_symbol_info (ignore_abfd, symbol, ret)
- bfd *ignore_abfd;
- asymbol *symbol;
- symbol_info *ret;
-{
- bfd_symbol_info (symbol, ret);
-}
-
-alent *
-elf_get_lineno (ignore_abfd, symbol)
- bfd *ignore_abfd;
- asymbol *symbol;
-{
- fprintf (stderr, "elf_get_lineno unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
- return NULL;
-}
-
-boolean
-elf_set_arch_mach (abfd, arch, machine)
- bfd *abfd;
- enum bfd_architecture arch;
- unsigned long machine;
-{
- /* If this isn't the right architecture for this backend, and this
- isn't the generic backend, fail. */
- if (arch != get_elf_backend_data (abfd)->arch
- && arch != bfd_arch_unknown
- && get_elf_backend_data (abfd)->arch != bfd_arch_unknown)
- return false;
-
- return bfd_default_set_arch_mach (abfd, arch, machine);
-}
-
-boolean
-elf_find_nearest_line (abfd,
- section,
- symbols,
- offset,
- filename_ptr,
- functionname_ptr,
- line_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- CONST char **filename_ptr;
- CONST char **functionname_ptr;
- unsigned int *line_ptr;
-{
- return false;
-}
-
-int
-elf_sizeof_headers (abfd, reloc)
- bfd *abfd;
- boolean reloc;
-{
- int ret;
-
- ret = sizeof (Elf_External_Ehdr);
- if (! reloc)
- ret += get_program_header_size (abfd, (Elf_Internal_Shdr **) NULL, 0,
- (bfd_vma) 0);
- return ret;
-}
-
-boolean
-elf_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
-{
- Elf_Internal_Shdr *hdr;
-
- if (! abfd->output_has_begun
- && ! elf_compute_section_file_positions (abfd,
- (struct bfd_link_info *) NULL))
- return false;
-
- hdr = &elf_section_data (section)->this_hdr;
-
- if (bfd_seek (abfd, hdr->sh_offset + offset, SEEK_SET) == -1)
- return false;
- if (bfd_write (location, 1, count, abfd) != count)
- return false;
-
- return true;
-}
-
-void
-elf_no_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
-{
- fprintf (stderr, "elf RELA relocation support for target machine unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
-}
-
-void
-elf_no_info_to_howto_rel (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf_Internal_Rel *dst;
-{
- fprintf (stderr, "elf REL relocation support for target machine unimplemented\n");
- fflush (stderr);
- BFD_FAIL ();
-}
-\f
-
-/* Core file support */
-
-#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
-#include <sys/procfs.h>
-#else
-#define bfd_prstatus(abfd, descdata, descsz, filepos) true
-#define bfd_fpregset(abfd, descdata, descsz, filepos) true
-#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true
-#endif
-
-#ifdef HAVE_PROCFS
-
-static boolean
-bfd_prstatus (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- asection *newsect;
- prstatus_t *status = (prstatus_t *) 0;
-
- if (descsz == sizeof (prstatus_t))
- {
- newsect = bfd_make_section (abfd, ".reg");
- if (newsect == NULL)
- return false;
- newsect->_raw_size = sizeof (status->pr_reg);
- newsect->filepos = filepos + (long) &status->pr_reg;
- newsect->flags = SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
- {
- memcpy (core_prstatus (abfd), descdata, descsz);
- }
- }
- return true;
-}
-
-/* Stash a copy of the prpsinfo structure away for future use. */
-
-static boolean
-bfd_prpsinfo (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- if (descsz == sizeof (prpsinfo_t))
- {
- if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- memcpy (core_prpsinfo (abfd), descdata, descsz);
- }
- return true;
-}
-
-static boolean
-bfd_fpregset (abfd, descdata, descsz, filepos)
- bfd *abfd;
- char *descdata;
- int descsz;
- long filepos;
-{
- asection *newsect;
-
- newsect = bfd_make_section (abfd, ".reg2");
- if (newsect == NULL)
- return false;
- newsect->_raw_size = descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- return true;
-}
-
-#endif /* HAVE_PROCFS */
-
-/* Return a pointer to the args (including the command name) that were
- seen by the program that generated the core dump. Note that for
- some reason, a spurious space is tacked onto the end of the args
- in some (at least one anyway) implementations, so strip it off if
- it exists. */
-
-char *
-elf_core_file_failing_command (abfd)
- bfd *abfd;
-{
-#ifdef HAVE_PROCFS
- if (core_prpsinfo (abfd))
- {
- prpsinfo_t *p = core_prpsinfo (abfd);
- char *scan = p->pr_psargs;
- while (*scan++)
- {;
- }
- scan -= 2;
- if ((scan > p->pr_psargs) && (*scan == ' '))
- {
- *scan = '\000';
- }
- return p->pr_psargs;
- }
-#endif
- return NULL;
-}
-
-/* Return the number of the signal that caused the core dump. Presumably,
- since we have a core file, we got a signal of some kind, so don't bother
- checking the other process status fields, just return the signal number.
- */
-
-int
-elf_core_file_failing_signal (abfd)
- bfd *abfd;
-{
-#ifdef HAVE_PROCFS
- if (core_prstatus (abfd))
- {
- return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
- }
-#endif
- return -1;
-}
-
-/* Check to see if the core file could reasonably be expected to have
- come for the current executable file. Note that by default we return
- true unless we find something that indicates that there might be a
- problem.
- */
-
-boolean
-elf_core_file_matches_executable_p (core_bfd, exec_bfd)
- bfd *core_bfd;
- bfd *exec_bfd;
-{
-#ifdef HAVE_PROCFS
- char *corename;
- char *execname;
-#endif
-
- /* First, xvecs must match since both are ELF files for the same target. */
-
- if (core_bfd->xvec != exec_bfd->xvec)
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
-
-#ifdef HAVE_PROCFS
-
- /* If no prpsinfo, just return true. Otherwise, grab the last component
- of the exec'd pathname from the prpsinfo. */
-
- if (core_prpsinfo (core_bfd))
- {
- corename = (((prpsinfo_t *) core_prpsinfo (core_bfd))->pr_fname);
- }
- else
- {
- return true;
- }
-
- /* Find the last component of the executable pathname. */
-
- if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
- {
- execname++;
- }
- else
- {
- execname = (char *) exec_bfd->filename;
- }
-
- /* See if they match */
-
- return strcmp (execname, corename) ? false : true;
-
-#else
-
- return true;
-
-#endif /* HAVE_PROCFS */
-}
-
-/* ELF core files contain a segment of type PT_NOTE, that holds much of
- the information that would normally be available from the /proc interface
- for the process, at the time the process dumped core. Currently this
- includes copies of the prstatus, prpsinfo, and fpregset structures.
-
- Since these structures are potentially machine dependent in size and
- ordering, bfd provides two levels of support for them. The first level,
- available on all machines since it does not require that the host
- have /proc support or the relevant include files, is to create a bfd
- section for each of the prstatus, prpsinfo, and fpregset structures,
- without any interpretation of their contents. With just this support,
- the bfd client will have to interpret the structures itself. Even with
- /proc support, it might want these full structures for it's own reasons.
-
- In the second level of support, where HAVE_PROCFS is defined, bfd will
- pick apart the structures to gather some additional information that
- clients may want, such as the general register set, the name of the
- exec'ed file and its arguments, the signal (if any) that caused the
- core dump, etc.
-
- */
-
-static boolean
-elf_corefile_note (abfd, hdr)
- bfd *abfd;
- Elf_Internal_Phdr *hdr;
-{
- Elf_External_Note *x_note_p; /* Elf note, external form */
- Elf_Internal_Note i_note; /* Elf note, internal form */
- char *buf = NULL; /* Entire note segment contents */
- char *namedata; /* Name portion of the note */
- char *descdata; /* Descriptor portion of the note */
- char *sectname; /* Name to use for new section */
- long filepos; /* File offset to descriptor data */
- asection *newsect;
-
- if (hdr->p_filesz > 0
- && (buf = (char *) malloc (hdr->p_filesz)) != NULL
- && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1
- && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz)
- {
- x_note_p = (Elf_External_Note *) buf;
- while ((char *) x_note_p < (buf + hdr->p_filesz))
- {
- i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
- i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
- i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
- namedata = x_note_p->name;
- descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
- filepos = hdr->p_offset + (descdata - buf);
- switch (i_note.type)
- {
- case NT_PRSTATUS:
- /* process descdata as prstatus info */
- if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".prstatus";
- break;
- case NT_FPREGSET:
- /* process descdata as fpregset info */
- if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".fpregset";
- break;
- case NT_PRPSINFO:
- /* process descdata as prpsinfo */
- if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos))
- return false;
- sectname = ".prpsinfo";
- break;
- default:
- /* Unknown descriptor, just ignore it. */
- sectname = NULL;
- break;
- }
- if (sectname != NULL)
- {
- newsect = bfd_make_section (abfd, sectname);
- if (newsect == NULL)
- return false;
- newsect->_raw_size = i_note.descsz;
- newsect->filepos = filepos;
- newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
- newsect->alignment_power = 2;
- }
- x_note_p = (Elf_External_Note *)
- (descdata + BFD_ALIGN (i_note.descsz, 4));
- }
- }
- if (buf != NULL)
- {
- free (buf);
- }
- else if (hdr->p_filesz > 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- return true;
-
-}
-
-/* Core files are simply standard ELF formatted files that partition
- the file using the execution view of the file (program header table)
- rather than the linking view. In fact, there is no section header
- table in a core file.
-
- The process status information (including the contents of the general
- register set) and the floating point register set are stored in a
- segment of type PT_NOTE. We handcraft a couple of extra bfd sections
- that allow standard bfd access to the general registers (.reg) and the
- floating point registers (.reg2).
-
- */
-
-const bfd_target *
-elf_core_file_p (abfd)
- bfd *abfd;
-{
- Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
- Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
- Elf_External_Phdr x_phdr; /* Program header table entry, external form */
- Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
- unsigned int phindex;
- struct elf_backend_data *ebd;
-
- /* Read in the ELF header in external format. */
-
- if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
- {
- if (bfd_get_error () != bfd_error_system_call)
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* Now check to see if we have a valid ELF file, and one that BFD can
- make use of. The magic number must match, the address size ('class')
- and byte-swapping must match our XVEC entry, and it must have a
- program header table (FIXME: See comments re segments at top of this
- file). */
-
- if (elf_file_p (&x_ehdr) == false)
- {
- wrong:
- bfd_set_error (bfd_error_wrong_format);
- return NULL;
- }
-
- /* FIXME, Check EI_VERSION here ! */
-
- {
-#if ARCH_SIZE == 32
- int desired_address_size = ELFCLASS32;
-#endif
-#if ARCH_SIZE == 64
- int desired_address_size = ELFCLASS64;
-#endif
-
- if (x_ehdr.e_ident[EI_CLASS] != desired_address_size)
- goto wrong;
- }
-
- /* Switch xvec to match the specified byte order. */
- switch (x_ehdr.e_ident[EI_DATA])
- {
- case ELFDATA2MSB: /* Big-endian */
- if (abfd->xvec->byteorder_big_p == false)
- goto wrong;
- break;
- case ELFDATA2LSB: /* Little-endian */
- if (abfd->xvec->byteorder_big_p == true)
- goto wrong;
- break;
- case ELFDATANONE: /* No data encoding specified */
- default: /* Unknown data encoding specified */
- goto wrong;
- }
-
- /* Allocate an instance of the elf_obj_tdata structure and hook it up to
- the tdata pointer in the bfd. */
-
- elf_tdata (abfd) =
- (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
- if (elf_tdata (abfd) == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
-
- /* FIXME, `wrong' returns from this point onward, leak memory. */
-
- /* Now that we know the byte order, swap in the rest of the header */
- i_ehdrp = elf_elfheader (abfd);
- elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
-#if DEBUG & 1
- elf_debug_file (i_ehdrp);
-#endif
-
- ebd = get_elf_backend_data (abfd);
-
- /* Check that the ELF e_machine field matches what this particular
- BFD format expects. */
- if (ebd->elf_machine_code != i_ehdrp->e_machine
- && (ebd->elf_machine_alt1 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
- && (ebd->elf_machine_alt2 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
- {
- const bfd_target * const *target_ptr;
-
- if (ebd->elf_machine_code != EM_NONE)
- goto wrong;
-
- /* This is the generic ELF target. Let it match any ELF target
- for which we do not have a specific backend. */
- for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
- {
- struct elf_backend_data *back;
-
- if ((*target_ptr)->flavour != bfd_target_elf_flavour)
- continue;
- back = (struct elf_backend_data *) (*target_ptr)->backend_data;
- if (back->elf_machine_code == i_ehdrp->e_machine)
- {
- /* target_ptr is an ELF backend which matches this
- object file, so reject the generic ELF target. */
- goto wrong;
- }
- }
- }
-
- /* If there is no program header, or the type is not a core file, then
- we are hosed. */
- if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
- goto wrong;
-
- /* Allocate space for a copy of the program header table in
- internal form, seek to the program header table in the file,
- read it in, and convert it to internal form. As a simple sanity
- check, verify that the what BFD thinks is the size of each program
- header table entry actually matches the size recorded in the file. */
-
- if (i_ehdrp->e_phentsize != sizeof (x_phdr))
- goto wrong;
- i_phdrp = (Elf_Internal_Phdr *)
- bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
- if (!i_phdrp)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
- if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
- return NULL;
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
- {
- if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
- != sizeof (x_phdr))
- return NULL;
- elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
- }
-
- /* Once all of the program headers have been read and converted, we
- can start processing them. */
-
- for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
- {
- bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
- if ((i_phdrp + phindex)->p_type == PT_NOTE)
- {
- if (! elf_corefile_note (abfd, i_phdrp + phindex))
- return NULL;
- }
- }
-
- /* Remember the entry point specified in the ELF file header. */
-
- bfd_get_start_address (abfd) = i_ehdrp->e_entry;
-
- return abfd->xvec;
-}
-\f
-/* ELF linker code. */
-
-static boolean elf_link_add_object_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_link_add_archive_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static Elf_Internal_Rela *elf_link_read_relocs
- PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
-static boolean elf_export_symbol
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_adjust_dynamic_symbol
- PARAMS ((struct elf_link_hash_entry *, PTR));
-
-/* This struct is used to pass information to routines called via
- elf_link_hash_traverse which must return failure. */
-
-struct elf_info_failed
-{
- boolean failed;
- struct bfd_link_info *info;
-};
-
-/* Given an ELF BFD, add symbols to the global hash table as
- appropriate. */
-
-boolean
-elf_bfd_link_add_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- bfd *first;
-
- switch (bfd_get_format (abfd))
- {
- case bfd_object:
- return elf_link_add_object_symbols (abfd, info);
- case bfd_archive:
- first = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
- if (first == NULL)
- {
- /* It's OK to have an empty archive. */
- return true;
- }
- if (! bfd_check_format (first, bfd_object))
- return false;
- if (bfd_get_flavour (first) != bfd_target_elf_flavour)
- {
- /* On Linux, we may have an a.out archive which got
- recognized as an ELF archive. Therefore, we treat all
- archives as though they were actually of the flavour of
- their first element. */
- return (*first->xvec->_bfd_link_add_symbols) (abfd, info);
- }
- return elf_link_add_archive_symbols (abfd, info);
- default:
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
-}
-
-/* Add symbols from an ELF archive file to the linker hash table. We
- don't use _bfd_generic_link_add_archive_symbols because of a
- problem which arises on UnixWare. The UnixWare libc.so is an
- archive which includes an entry libc.so.1 which defines a bunch of
- symbols. The libc.so archive also includes a number of other
- object files, which also define symbols, some of which are the same
- as those defined in libc.so.1. Correct linking requires that we
- consider each object file in turn, and include it if it defines any
- symbols we need. _bfd_generic_link_add_archive_symbols does not do
- this; it looks through the list of undefined symbols, and includes
- any object file which defines them. When this algorithm is used on
- UnixWare, it winds up pulling in libc.so.1 early and defining a
- bunch of symbols. This means that some of the other objects in the
- archive are not included in the link, which is incorrect since they
- precede libc.so.1 in the archive.
-
- Fortunately, ELF archive handling is simpler than that done by
- _bfd_generic_link_add_archive_symbols, which has to allow for a.out
- oddities. In ELF, if we find a symbol in the archive map, and the
- symbol is currently undefined, we know that we must pull in that
- object file.
-
- Unfortunately, we do have to make multiple passes over the symbol
- table until nothing further is resolved. */
-
-static boolean
-elf_link_add_archive_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- symindex c;
- boolean *defined = NULL;
- boolean *included = NULL;
- carsym *symdefs;
- boolean loop;
-
- if (! bfd_has_map (abfd))
- {
- /* An empty archive is a special case. */
- if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL)
- return true;
- bfd_set_error (bfd_error_no_armap);
- return false;
- }
-
- /* Keep track of all symbols we know to be already defined, and all
- files we know to be already included. This is to speed up the
- second and subsequent passes. */
- c = bfd_ardata (abfd)->symdef_count;
- if (c == 0)
- return true;
- defined = (boolean *) malloc (c * sizeof (boolean));
- included = (boolean *) malloc (c * sizeof (boolean));
- if (defined == (boolean *) NULL || included == (boolean *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- memset (defined, 0, c * sizeof (boolean));
- memset (included, 0, c * sizeof (boolean));
-
- symdefs = bfd_ardata (abfd)->symdefs;
-
- do
- {
- file_ptr last;
- symindex i;
- carsym *symdef;
- carsym *symdefend;
-
- loop = false;
- last = -1;
-
- symdef = symdefs;
- symdefend = symdef + c;
- for (i = 0; symdef < symdefend; symdef++, i++)
- {
- struct elf_link_hash_entry *h;
- bfd *element;
- struct bfd_link_hash_entry *undefs_tail;
- symindex mark;
-
- if (defined[i] || included[i])
- continue;
- if (symdef->file_offset == last)
- {
- included[i] = true;
- continue;
- }
-
- h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
- false, false, false);
- if (h == (struct elf_link_hash_entry *) NULL)
- continue;
- if (h->root.type != bfd_link_hash_undefined)
- {
- defined[i] = true;
- continue;
- }
-
- /* We need to include this archive member. */
-
- element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
- if (element == (bfd *) NULL)
- goto error_return;
-
- if (! bfd_check_format (element, bfd_object))
- goto error_return;
-
- /* Doublecheck that we have not included this object
- already--it should be impossible, but there may be
- something wrong with the archive. */
- if (element->archive_pass != 0)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- element->archive_pass = 1;
-
- undefs_tail = info->hash->undefs_tail;
-
- if (! (*info->callbacks->add_archive_element) (info, element,
- symdef->name))
- goto error_return;
- if (! elf_link_add_object_symbols (element, info))
- goto error_return;
-
- /* If there are any new undefined symbols, we need to make
- another pass through the archive in order to see whether
- they can be defined. FIXME: This isn't perfect, because
- common symbols wind up on undefs_tail and because an
- undefined symbol which is defined later on in this pass
- does not require another pass. This isn't a bug, but it
- does make the code less efficient than it could be. */
- if (undefs_tail != info->hash->undefs_tail)
- loop = true;
-
- /* Look backward to mark all symbols from this object file
- which we have already seen in this pass. */
- mark = i;
- do
- {
- included[mark] = true;
- if (mark == 0)
- break;
- --mark;
- }
- while (symdefs[mark].file_offset == symdef->file_offset);
-
- /* We mark subsequent symbols from this object file as we go
- on through the loop. */
- last = symdef->file_offset;
- }
- }
- while (loop);
-
- free (defined);
- free (included);
-
- return true;
-
- error_return:
- if (defined != (boolean *) NULL)
- free (defined);
- if (included != (boolean *) NULL)
- free (included);
- return false;
-}
-
-/* Record a new dynamic symbol. We record the dynamic symbols as we
- read the input files, since we need to have a list of all of them
- before we can determine the final sizes of the output sections.
- Note that we may actually call this function even though we are not
- going to output any dynamic symbols; in some cases we know that a
- symbol should be in the dynamic symbol table, but only if there is
- one. */
-
-boolean
-elf_link_record_dynamic_symbol (info, h)
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
-{
- if (h->dynindx == -1)
- {
- struct bfd_strtab_hash *dynstr;
-
- h->dynindx = elf_hash_table (info)->dynsymcount;
- ++elf_hash_table (info)->dynsymcount;
-
- dynstr = elf_hash_table (info)->dynstr;
- if (dynstr == NULL)
- {
- /* Create a strtab to hold the dynamic symbol names. */
- elf_hash_table (info)->dynstr = dynstr = elf_stringtab_init ();
- if (dynstr == NULL)
- return false;
- }
-
- h->dynstr_index = ((unsigned long)
- _bfd_stringtab_add (dynstr, h->root.root.string,
- true, false));
- if (h->dynstr_index == (unsigned long) -1)
- return false;
- }
-
- return true;
-}
-
-/* Add symbols from an ELF object file to the linker hash table. */
-
-static boolean
-elf_link_add_object_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
- const Elf_Internal_Sym *,
- const char **, flagword *,
- asection **, bfd_vma *));
- boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *,
- asection *, const Elf_Internal_Rela *));
- boolean collect;
- Elf_Internal_Shdr *hdr;
- size_t symcount;
- size_t extsymcount;
- size_t extsymoff;
- Elf_External_Sym *buf = NULL;
- struct elf_link_hash_entry **sym_hash;
- boolean dynamic;
- Elf_External_Dyn *dynbuf = NULL;
- struct elf_link_hash_entry *weaks;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
-
- add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook;
- collect = get_elf_backend_data (abfd)->collect;
-
- /* A stripped shared library might only have a dynamic symbol table,
- not a regular symbol table. In that case we can still go ahead
- and link using the dynamic symbol table. */
- if (elf_onesymtab (abfd) == 0
- && elf_dynsymtab (abfd) != 0)
- {
- elf_onesymtab (abfd) = elf_dynsymtab (abfd);
- elf_tdata (abfd)->symtab_hdr = elf_tdata (abfd)->dynsymtab_hdr;
- }
-
- hdr = &elf_tdata (abfd)->symtab_hdr;
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- /* The sh_info field of the symtab header tells us where the
- external symbols start. We don't care about the local symbols at
- this point. */
- if (elf_bad_symtab (abfd))
- {
- extsymcount = symcount;
- extsymoff = 0;
- }
- else
- {
- extsymcount = symcount - hdr->sh_info;
- extsymoff = hdr->sh_info;
- }
-
- buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym));
- if (buf == NULL && extsymcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* We store a pointer to the hash table entry for each external
- symbol. */
- sym_hash = ((struct elf_link_hash_entry **)
- bfd_alloc (abfd,
- extsymcount * sizeof (struct elf_link_hash_entry *)));
- if (sym_hash == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- elf_sym_hashes (abfd) = sym_hash;
-
- if (elf_elfheader (abfd)->e_type != ET_DYN)
- {
- dynamic = false;
-
- /* If we are creating a shared library, create all the dynamic
- sections immediately. We need to attach them to something,
- so we attach them to this BFD, provided it is the right
- format. FIXME: If there are no input BFD's of the same
- format as the output, we can't make a shared library. */
- if (info->shared
- && ! elf_hash_table (info)->dynamic_sections_created
- && abfd->xvec == info->hash->creator)
- {
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
- }
- }
- else
- {
- asection *s;
- boolean add_needed;
- const char *name;
- bfd_size_type oldsize;
- bfd_size_type strindex;
-
- dynamic = true;
-
- /* You can't use -r against a dynamic object. Also, there's no
- hope of using a dynamic object which does not exactly match
- the format of the output file. */
- if (info->relocateable
- || info->hash->creator != abfd->xvec)
- {
- bfd_set_error (bfd_error_invalid_operation);
- goto error_return;
- }
-
- /* Find the name to use in a DT_NEEDED entry that refers to this
- object. If the object has a DT_SONAME entry, we use it.
- Otherwise, if the generic linker stuck something in
- elf_dt_needed_name, we use that. Otherwise, we just use the
- file name. If the generic linker put a null string into
- elf_dt_needed_name, we don't make a DT_NEEDED entry at all,
- even if there is a DT_SONAME entry. */
- add_needed = true;
- name = bfd_get_filename (abfd);
- if (elf_dt_needed_name (abfd) != NULL)
- {
- name = elf_dt_needed_name (abfd);
- if (*name == '\0')
- add_needed = false;
- }
- s = bfd_get_section_by_name (abfd, ".dynamic");
- if (s != NULL)
- {
- Elf_External_Dyn *extdyn;
- Elf_External_Dyn *extdynend;
- int elfsec;
- unsigned long link;
-
- dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size);
- if (dynbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
- (file_ptr) 0, s->_raw_size))
- goto error_return;
-
- elfsec = elf_section_from_bfd_section (abfd, s);
- if (elfsec == -1)
- goto error_return;
- link = elf_elfsections (abfd)[elfsec]->sh_link;
-
- extdyn = dynbuf;
- extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
- for (; extdyn < extdynend; extdyn++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (abfd, extdyn, &dyn);
- if (add_needed && dyn.d_tag == DT_SONAME)
- {
- name = elf_string_from_elf_section (abfd, link,
- dyn.d_un.d_val);
- if (name == NULL)
- goto error_return;
- }
- if (dyn.d_tag == DT_NEEDED)
- {
- struct bfd_elf_link_needed_list *n, **pn;
- char *fnm, *anm;
-
- n = bfd_alloc (abfd,
- sizeof (struct bfd_elf_link_needed_list));
- fnm = elf_string_from_elf_section (abfd, link,
- dyn.d_un.d_val);
- if (n == NULL || fnm == NULL)
- goto error_return;
- anm = bfd_alloc (abfd, strlen (fnm) + 1);
- if (anm == NULL)
- goto error_return;
- strcpy (anm, fnm);
- n->name = anm;
- n->by = abfd;
- n->next = NULL;
- for (pn = &elf_hash_table (info)->needed;
- *pn != NULL;
- pn = &(*pn)->next)
- ;
- *pn = n;
- }
- }
-
- free (dynbuf);
- dynbuf = NULL;
- }
-
- /* We do not want to include any of the sections in a dynamic
- object in the output file. We hack by simply clobbering the
- list of sections in the BFD. This could be handled more
- cleanly by, say, a new section flag; the existing
- SEC_NEVER_LOAD flag is not the one we want, because that one
- still implies that the section takes up space in the output
- file. */
- abfd->sections = NULL;
-
- /* If this is the first dynamic object found in the link, create
- the special sections required for dynamic linking. */
- if (! elf_hash_table (info)->dynamic_sections_created)
- {
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
- }
-
- if (add_needed)
- {
- /* Add a DT_NEEDED entry for this dynamic object. */
- oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
- strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name,
- true, false);
- if (strindex == (bfd_size_type) -1)
- goto error_return;
-
- if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr))
- {
- asection *sdyn;
- Elf_External_Dyn *dyncon, *dynconend;
-
- /* The hash table size did not change, which means that
- the dynamic object name was already entered. If we
- have already included this dynamic object in the
- link, just ignore it. There is no reason to include
- a particular dynamic object more than once. */
- sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
- ".dynamic");
- BFD_ASSERT (sdyn != NULL);
-
- dyncon = (Elf_External_Dyn *) sdyn->contents;
- dynconend = (Elf_External_Dyn *) (sdyn->contents +
- sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon,
- &dyn);
- if (dyn.d_tag == DT_NEEDED
- && dyn.d_un.d_val == strindex)
- {
- if (buf != NULL)
- free (buf);
- return true;
- }
- }
- }
-
- if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex))
- goto error_return;
- }
- }
-
- if (bfd_seek (abfd,
- hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym),
- SEEK_SET) != 0
- || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd)
- != extsymcount * sizeof (Elf_External_Sym)))
- goto error_return;
-
- weaks = NULL;
-
- esymend = buf + extsymcount;
- for (esym = buf; esym < esymend; esym++, sym_hash++)
- {
- Elf_Internal_Sym sym;
- int bind;
- bfd_vma value;
- asection *sec;
- flagword flags;
- const char *name;
- struct elf_link_hash_entry *h = NULL;
- boolean definition;
-
- elf_swap_symbol_in (abfd, esym, &sym);
-
- flags = BSF_NO_FLAGS;
- sec = NULL;
- value = sym.st_value;
- *sym_hash = NULL;
-
- bind = ELF_ST_BIND (sym.st_info);
- if (bind == STB_LOCAL)
- {
- /* This should be impossible, since ELF requires that all
- global symbols follow all local symbols, and that sh_info
- point to the first global symbol. Unfortunatealy, Irix 5
- screws this up. */
- continue;
- }
- else if (bind == STB_GLOBAL)
- {
- if (sym.st_shndx != SHN_UNDEF
- && sym.st_shndx != SHN_COMMON)
- flags = BSF_GLOBAL;
- else
- flags = 0;
- }
- else if (bind == STB_WEAK)
- flags = BSF_WEAK;
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- if (sym.st_shndx == SHN_UNDEF)
- sec = bfd_und_section_ptr;
- else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE)
- {
- sec = section_from_elf_index (abfd, sym.st_shndx);
- if (sec != NULL)
- value -= sec->vma;
- else
- sec = bfd_abs_section_ptr;
- }
- else if (sym.st_shndx == SHN_ABS)
- sec = bfd_abs_section_ptr;
- else if (sym.st_shndx == SHN_COMMON)
- {
- sec = bfd_com_section_ptr;
- /* What ELF calls the size we call the value. What ELF
- calls the value we call the alignment. */
- value = sym.st_size;
- }
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- name = elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
- if (name == (const char *) NULL)
- goto error_return;
-
- if (add_symbol_hook)
- {
- if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
- &value))
- goto error_return;
-
- /* The hook function sets the name to NULL if this symbol
- should be skipped for some reason. */
- if (name == (const char *) NULL)
- continue;
- }
-
- /* Sanity check that all possibilities were handled. */
- if (sec == (asection *) NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
-
- if (bfd_is_und_section (sec)
- || bfd_is_com_section (sec))
- definition = false;
- else
- definition = true;
-
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- /* We need to look up the symbol now in order to get some of
- the dynamic object handling right. We pass the hash
- table entry in to _bfd_generic_link_add_one_symbol so
- that it does not have to look it up again. */
- h = elf_link_hash_lookup (elf_hash_table (info), name,
- true, false, false);
- if (h == NULL)
- goto error_return;
- *sym_hash = h;
-
- /* If we are looking at a dynamic object, and this is a
- definition, we need to see if it has already been defined
- by some other object. If it has, we want to use the
- existing definition, and we do not want to report a
- multiple symbol definition error; we do this by
- clobbering sec to be bfd_und_section_ptr. */
- if (dynamic && definition)
- {
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- sec = bfd_und_section_ptr;
- }
-
- /* Similarly, if we are not looking at a dynamic object, and
- we have a definition, we want to override any definition
- we may have from a dynamic object. Symbols from regular
- files always take precedence over symbols from dynamic
- objects, even if they are defined after the dynamic
- object in the link. */
- if (! dynamic
- && definition
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (bfd_get_flavour (h->root.u.def.section->owner)
- == bfd_target_elf_flavour)
- && (elf_elfheader (h->root.u.def.section->owner)->e_type
- == ET_DYN))
- {
- /* Change the hash table entry to undefined, and let
- _bfd_generic_link_add_one_symbol do the right thing
- with the new definition. */
- h->root.type = bfd_link_hash_undefined;
- h->root.u.undef.abfd = h->root.u.def.section->owner;
- }
- }
-
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, name, flags, sec, value, (const char *) NULL,
- false, collect, (struct bfd_link_hash_entry **) sym_hash)))
- goto error_return;
-
- if (dynamic
- && definition
- && (flags & BSF_WEAK) != 0
- && ELF_ST_TYPE (sym.st_info) != STT_FUNC
- && info->hash->creator->flavour == bfd_target_elf_flavour
- && (*sym_hash)->weakdef == NULL)
- {
- /* Keep a list of all weak defined non function symbols from
- a dynamic object, using the weakdef field. Later in this
- function we will set the weakdef field to the correct
- value. We only put non-function symbols from dynamic
- objects on this list, because that happens to be the only
- time we need to know the normal symbol corresponding to a
- weak symbol, and the information is time consuming to
- figure out. If the weakdef field is not already NULL,
- then this symbol was already defined by some previous
- dynamic object, and we will be using that previous
- definition anyhow. */
-
- (*sym_hash)->weakdef = weaks;
- weaks = *sym_hash;
- }
-
- /* Get the alignment of a common symbol. */
- if (sym.st_shndx == SHN_COMMON
- && (*sym_hash)->root.type == bfd_link_hash_common)
- (*sym_hash)->root.u.c.p->alignment_power = bfd_log2 (sym.st_value);
-
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- int old_flags;
- boolean dynsym;
- int new_flag;
-
- /* Remember the symbol size and type. */
- if (sym.st_size != 0)
- {
- /* FIXME: We should probably somehow give a warning if
- the symbol size changes. */
- h->size = sym.st_size;
- }
- if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE)
- {
- /* FIXME: We should probably somehow give a warning if
- the symbol type changes. */
- h->type = ELF_ST_TYPE (sym.st_info);
- }
-
- /* Set a flag in the hash table entry indicating the type of
- reference or definition we just found. Keep a count of
- the number of dynamic symbols we find. A dynamic symbol
- is one which is referenced or defined by both a regular
- object and a shared object, or one which is referenced or
- defined by more than one shared object. */
- old_flags = h->elf_link_hash_flags;
- dynsym = false;
- if (! dynamic)
- {
- if (! definition)
- new_flag = ELF_LINK_HASH_REF_REGULAR;
- else
- new_flag = ELF_LINK_HASH_DEF_REGULAR;
- if (info->shared
- || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
- dynsym = true;
- }
- else
- {
- if (! definition)
- new_flag = ELF_LINK_HASH_REF_DYNAMIC;
- else
- new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
- if ((old_flags & new_flag) != 0
- || (old_flags & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR)) != 0)
- dynsym = true;
- }
-
- h->elf_link_hash_flags |= new_flag;
- if (dynsym && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- }
- }
- }
-
- /* Now set the weakdefs field correctly for all the weak defined
- symbols we found. The only way to do this is to search all the
- symbols. Since we only need the information for non functions in
- dynamic objects, that's the only time we actually put anything on
- the list WEAKS. We need this information so that if a regular
- object refers to a symbol defined weakly in a dynamic object, the
- real symbol in the dynamic object is also put in the dynamic
- symbols; we also must arrange for both symbols to point to the
- same memory location. We could handle the general case of symbol
- aliasing, but a general symbol alias can only be generated in
- assembler code, handling it correctly would be very time
- consuming, and other ELF linkers don't handle general aliasing
- either. */
- while (weaks != NULL)
- {
- struct elf_link_hash_entry *hlook;
- asection *slook;
- bfd_vma vlook;
- struct elf_link_hash_entry **hpp;
- struct elf_link_hash_entry **hppend;
-
- hlook = weaks;
- weaks = hlook->weakdef;
- hlook->weakdef = NULL;
-
- BFD_ASSERT (hlook->root.type == bfd_link_hash_defined
- || hlook->root.type == bfd_link_hash_defweak
- || hlook->root.type == bfd_link_hash_common
- || hlook->root.type == bfd_link_hash_indirect);
- slook = hlook->root.u.def.section;
- vlook = hlook->root.u.def.value;
-
- hpp = elf_sym_hashes (abfd);
- hppend = hpp + extsymcount;
- for (; hpp < hppend; hpp++)
- {
- struct elf_link_hash_entry *h;
-
- h = *hpp;
- if (h != NULL && h != hlook
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->root.u.def.section == slook
- && h->root.u.def.value == vlook)
- {
- hlook->weakdef = h;
-
- /* If the weak definition is in the list of dynamic
- symbols, make sure the real definition is put there
- as well. */
- if (hlook->dynindx != -1
- && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- }
-
- break;
- }
- }
- }
-
- if (buf != NULL)
- {
- free (buf);
- buf = NULL;
- }
-
- /* If this object is the same format as the output object, and it is
- not a shared library, then let the backend look through the
- relocs.
-
- This is required to build global offset table entries and to
- arrange for dynamic relocs. It is not required for the
- particular common case of linking non PIC code, even when linking
- against shared libraries, but unfortunately there is no way of
- knowing whether an object file has been compiled PIC or not.
- Looking through the relocs is not particularly time consuming.
- The problem is that we must either (1) keep the relocs in memory,
- which causes the linker to require additional runtime memory or
- (2) read the relocs twice from the input file, which wastes time.
- This would be a good case for using mmap.
-
- I have no idea how to handle linking PIC code into a file of a
- different format. It probably can't be done. */
- check_relocs = get_elf_backend_data (abfd)->check_relocs;
- if (! dynamic
- && abfd->xvec == info->hash->creator
- && check_relocs != NULL)
- {
- asection *o;
-
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- Elf_Internal_Rela *internal_relocs;
- boolean ok;
-
- if ((o->flags & SEC_RELOC) == 0
- || o->reloc_count == 0)
- continue;
-
- /* I believe we can ignore the relocs for any section which
- does not form part of the final process image, such as a
- debugging section. */
- if ((o->flags & SEC_ALLOC) == 0)
- continue;
-
- internal_relocs = elf_link_read_relocs (abfd, o, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->keep_memory);
- if (internal_relocs == NULL)
- goto error_return;
-
- ok = (*check_relocs) (abfd, info, o, internal_relocs);
-
- if (! info->keep_memory)
- free (internal_relocs);
-
- if (! ok)
- goto error_return;
- }
- }
-
- return true;
-
- error_return:
- if (buf != NULL)
- free (buf);
- if (dynbuf != NULL)
- free (dynbuf);
- return false;
-}
-
-/* Create some sections which will be filled in with dynamic linking
- information. ABFD is an input file which requires dynamic sections
- to be created. The dynamic sections take up virtual memory space
- when the final executable is run, so we need to create them before
- addresses are assigned to the output sections. We work out the
- actual contents and size of these sections later. */
-
-boolean
-elf_link_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
- struct elf_backend_data *bed;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- return true;
-
- /* Make sure that all dynamic sections use the same input BFD. */
- if (elf_hash_table (info)->dynobj == NULL)
- elf_hash_table (info)->dynobj = abfd;
- else
- abfd = elf_hash_table (info)->dynobj;
-
- /* Note that we set the SEC_IN_MEMORY flag for all of these
- sections. */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
-
- /* A dynamically linked executable has a .interp section, but a
- shared library does not. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".interp");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
- }
-
- s = bfd_make_section (abfd, ".dynsym");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- s = bfd_make_section (abfd, ".dynstr");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
-
- /* Create a strtab to hold the dynamic symbol names. */
- if (elf_hash_table (info)->dynstr == NULL)
- {
- elf_hash_table (info)->dynstr = elf_stringtab_init ();
- if (elf_hash_table (info)->dynstr == NULL)
- return false;
- }
-
- s = bfd_make_section (abfd, ".dynamic");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- /* The special symbol _DYNAMIC is always set to the start of the
- .dynamic section. This call occurs before we have processed the
- symbols for any dynamic object, so we don't have to worry about
- overriding a dynamic definition. We could set _DYNAMIC in a
- linker script, but we only want to define it if we are, in fact,
- creating a .dynamic section. We don't want to define it if there
- is no .dynamic section, since on some ELF platforms the start up
- code examines it to decide how to initialize the process. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! elf_link_record_dynamic_symbol (info, h))
- return false;
-
- s = bfd_make_section (abfd, ".hash");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- /* Let the backend create the rest of the sections. This lets the
- backend set the right flags. The backend will normally create
- the .got and .plt sections. */
- bed = get_elf_backend_data (abfd);
- if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info))
- return false;
-
- elf_hash_table (info)->dynamic_sections_created = true;
-
- return true;
-}
-
-/* Add an entry to the .dynamic table. */
-
-boolean
-elf_add_dynamic_entry (info, tag, val)
- struct bfd_link_info *info;
- bfd_vma tag;
- bfd_vma val;
-{
- Elf_Internal_Dyn dyn;
- bfd *dynobj;
- asection *s;
- size_t newsize;
- bfd_byte *newcontents;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- s = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (s != NULL);
-
- newsize = s->_raw_size + sizeof (Elf_External_Dyn);
- if (s->contents == NULL)
- newcontents = (bfd_byte *) malloc (newsize);
- else
- newcontents = (bfd_byte *) realloc (s->contents, newsize);
- if (newcontents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- dyn.d_tag = tag;
- dyn.d_un.d_val = val;
- elf_swap_dyn_out (dynobj, &dyn,
- (Elf_External_Dyn *) (newcontents + s->_raw_size));
-
- s->_raw_size = newsize;
- s->contents = newcontents;
-
- return true;
-}
-
-/* Read and swap the relocs for a section. They may have been cached.
- If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
- they are used as buffers to read into. They are known to be large
- enough. If the INTERNAL_RELOCS relocs argument is NULL, the return
- value is allocated using either malloc or bfd_alloc, according to
- the KEEP_MEMORY argument. */
-
-static Elf_Internal_Rela *
-elf_link_read_relocs (abfd, o, external_relocs, internal_relocs, keep_memory)
- bfd *abfd;
- asection *o;
- PTR external_relocs;
- Elf_Internal_Rela *internal_relocs;
- boolean keep_memory;
-{
- Elf_Internal_Shdr *rel_hdr;
- PTR alloc1 = NULL;
- Elf_Internal_Rela *alloc2 = NULL;
-
- if (elf_section_data (o)->relocs != NULL)
- return elf_section_data (o)->relocs;
-
- if (o->reloc_count == 0)
- return NULL;
-
- rel_hdr = &elf_section_data (o)->rel_hdr;
-
- if (internal_relocs == NULL)
- {
- size_t size;
-
- size = o->reloc_count * sizeof (Elf_Internal_Rela);
- if (keep_memory)
- internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
- else
- internal_relocs = alloc2 = (Elf_Internal_Rela *) malloc (size);
- if (internal_relocs == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- }
-
- if (external_relocs == NULL)
- {
- alloc1 = (PTR) malloc (rel_hdr->sh_size);
- if (alloc1 == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- external_relocs = alloc1;
- }
-
- if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0)
- || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd)
- != rel_hdr->sh_size))
- goto error_return;
-
- /* Swap in the relocs. For convenience, we always produce an
- Elf_Internal_Rela array; if the relocs are Rel, we set the addend
- to 0. */
- if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- Elf_External_Rel *erelend;
- Elf_Internal_Rela *irela;
-
- erel = (Elf_External_Rel *) external_relocs;
- erelend = erel + o->reloc_count;
- irela = internal_relocs;
- for (; erel < erelend; erel++, irela++)
- {
- Elf_Internal_Rel irel;
-
- elf_swap_reloc_in (abfd, erel, &irel);
- irela->r_offset = irel.r_offset;
- irela->r_info = irel.r_info;
- irela->r_addend = 0;
- }
- }
- else
- {
- Elf_External_Rela *erela;
- Elf_External_Rela *erelaend;
- Elf_Internal_Rela *irela;
-
- BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) external_relocs;
- erelaend = erela + o->reloc_count;
- irela = internal_relocs;
- for (; erela < erelaend; erela++, irela++)
- elf_swap_reloca_in (abfd, erela, irela);
- }
-
- /* Cache the results for next time, if we can. */
- if (keep_memory)
- elf_section_data (o)->relocs = internal_relocs;
-
- if (alloc1 != NULL)
- free (alloc1);
-
- /* Don't free alloc2, since if it was allocated we are passing it
- back (under the name of internal_relocs). */
-
- return internal_relocs;
-
- error_return:
- if (alloc1 != NULL)
- free (alloc1);
- if (alloc2 != NULL)
- free (alloc2);
- return NULL;
-}
-
-/* Record an assignment to a symbol made by a linker script. We need
- this in case some dynamic object refers to this symbol. */
-
-/*ARGSUSED*/
-boolean
-NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide)
- bfd *output_bfd;
- struct bfd_link_info *info;
- const char *name;
- boolean provide;
-{
- struct elf_link_hash_entry *h;
-
- if (info->hash->creator->flavour != bfd_target_elf_flavour)
- return true;
-
- h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false);
- if (h == NULL)
- return false;
-
- /* If this symbol is being provided by the linker script, and it is
- currently defined by a dynamic object, but not by a regular
- object, then mark it as undefined so that the generic linker will
- force the correct value. */
- if (provide
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- h->root.type = bfd_link_hash_undefined;
-
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0
- || info->shared)
- && h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- return false;
-
- /* If this is a weak defined symbol, and we know a corresponding
- real symbol from the same dynamic object, make sure the real
- symbol is also made into a dynamic symbol. */
- if (h->weakdef != NULL
- && h->weakdef->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h->weakdef))
- return false;
- }
- }
-
- return true;
-}
-
-/* Array used to determine the number of hash table buckets to use
- based on the number of symbols there are. If there are fewer than
- 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
- fewer than 37 we use 17 buckets, and so forth. We never use more
- than 521 buckets. */
-
-static const size_t elf_buckets[] =
-{
- 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0
-};
-
-/* Set up the sizes and contents of the ELF dynamic sections. This is
- called by the ELF linker emulation before_allocation routine. We
- must set the sizes of the sections before the linker sets the
- addresses of the various sections. */
-
-boolean
-NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath,
- export_dynamic, info, sinterpptr)
- bfd *output_bfd;
- const char *soname;
- const char *rpath;
- boolean export_dynamic;
- struct bfd_link_info *info;
- asection **sinterpptr;
-{
- bfd *dynobj;
- struct elf_backend_data *bed;
-
- *sinterpptr = NULL;
-
- if (info->hash->creator->flavour != bfd_target_elf_flavour)
- return true;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- /* If there were no dynamic objects in the link, there is nothing to
- do here. */
- if (dynobj == NULL)
- return true;
-
- /* If we are supposed to export all symbols into the dynamic symbol
- table (this is not the normal case), then do so. */
- if (export_dynamic)
- {
- struct elf_info_failed eif;
-
- eif.failed = false;
- eif.info = info;
- elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol,
- (PTR) &eif);
- if (eif.failed)
- return false;
- }
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- struct elf_info_failed eif;
- bfd_size_type strsize;
-
- *sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (*sinterpptr != NULL || info->shared);
-
- if (soname != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, soname,
- true, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, DT_SONAME, indx))
- return false;
- }
-
- if (rpath != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath,
- true, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, DT_RPATH, indx))
- return false;
- }
-
- /* Find all symbols which were defined in a dynamic object and make
- the backend pick a reasonable value for them. */
- eif.failed = false;
- eif.info = info;
- elf_link_hash_traverse (elf_hash_table (info),
- elf_adjust_dynamic_symbol,
- (PTR) &eif);
- if (eif.failed)
- return false;
-
- /* Add some entries to the .dynamic section. We fill in some of the
- values later, in elf_bfd_final_link, but we must add the entries
- now so that we know the final size of the .dynamic section. */
- if (elf_link_hash_lookup (elf_hash_table (info), "_init", false,
- false, false) != NULL)
- {
- if (! elf_add_dynamic_entry (info, DT_INIT, 0))
- return false;
- }
- if (elf_link_hash_lookup (elf_hash_table (info), "_fini", false,
- false, false) != NULL)
- {
- if (! elf_add_dynamic_entry (info, DT_FINI, 0))
- return false;
- }
- strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
- if (! elf_add_dynamic_entry (info, DT_HASH, 0)
- || ! elf_add_dynamic_entry (info, DT_STRTAB, 0)
- || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0)
- || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize)
- || ! elf_add_dynamic_entry (info, DT_SYMENT,
- sizeof (Elf_External_Sym)))
- return false;
- }
-
- /* The backend must work out the sizes of all the other dynamic
- sections. */
- bed = get_elf_backend_data (output_bfd);
- if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
- return false;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- size_t dynsymcount;
- asection *s;
- size_t i;
- size_t bucketcount;
- Elf_Internal_Sym isym;
-
- /* Set the size of the .dynsym and .hash sections. We counted
- the number of dynamic symbols in elf_link_add_object_symbols.
- We will build the contents of .dynsym and .hash when we build
- the final symbol table, because until then we do not know the
- correct value to give the symbols. We built the .dynstr
- section as we went along in elf_link_add_object_symbols. */
- dynsymcount = elf_hash_table (info)->dynsymcount;
- s = bfd_get_section_by_name (dynobj, ".dynsym");
- BFD_ASSERT (s != NULL);
- s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
-
- /* The first entry in .dynsym is a dummy symbol. */
- isym.st_value = 0;
- isym.st_size = 0;
- isym.st_name = 0;
- isym.st_info = 0;
- isym.st_other = 0;
- isym.st_shndx = 0;
- elf_swap_symbol_out (output_bfd, &isym,
- (Elf_External_Sym *) s->contents);
-
- for (i = 0; elf_buckets[i] != 0; i++)
- {
- bucketcount = elf_buckets[i];
- if (dynsymcount < elf_buckets[i + 1])
- break;
- }
-
- s = bfd_get_section_by_name (dynobj, ".hash");
- BFD_ASSERT (s != NULL);
- s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- memset (s->contents, 0, s->_raw_size);
-
- put_word (output_bfd, bucketcount, s->contents);
- put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8));
-
- elf_hash_table (info)->bucketcount = bucketcount;
-
- s = bfd_get_section_by_name (dynobj, ".dynstr");
- BFD_ASSERT (s != NULL);
- s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
-
- if (! elf_add_dynamic_entry (info, DT_NULL, 0))
- return false;
- }
-
- return true;
-}
-
-/* This routine is used to export all defined symbols into the dynamic
- symbol table. It is called via elf_link_hash_traverse. */
-
-static boolean
-elf_export_symbol (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_info_failed *eif = (struct elf_info_failed *) data;
-
- if (h->dynindx == -1
- && (h->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0)
- {
- if (! elf_link_record_dynamic_symbol (eif->info, h))
- {
- eif->failed = true;
- return false;
- }
- }
-
- return true;
-}
-
-/* Make the backend pick a good value for a dynamic symbol. This is
- called via elf_link_hash_traverse, and also calls itself
- recursively. */
-
-static boolean
-elf_adjust_dynamic_symbol (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_info_failed *eif = (struct elf_info_failed *) data;
- bfd *dynobj;
- struct elf_backend_data *bed;
-
- /* If this symbol does not require a PLT entry, and it is not
- defined by a dynamic object, or is not referenced by a regular
- object, ignore it. FIXME: Do we need to worry about symbols
- which are defined by one dynamic object and referenced by another
- one? */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0))
- return true;
-
- /* If we've already adjusted this symbol, don't do it again. This
- can happen via a recursive call. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
- return true;
-
- /* Don't look at this symbol again. Note that we must set this
- after checking the above conditions, because we may look at a
- symbol once, decide not to do anything, and then get called
- recursively later after REF_REGULAR is set below. */
- h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
-
- /* If this is a weak definition, and we know a real definition, and
- the real symbol is not itself defined by a regular object file,
- then get a good value for the real definition. We handle the
- real symbol first, for the convenience of the backend routine.
-
- Note that there is a confusing case here. If the real definition
- is defined by a regular object file, we don't get the real symbol
- from the dynamic object, but we do get the weak symbol. If the
- processor backend uses a COPY reloc, then if some routine in the
- dynamic object changes the real symbol, we will not see that
- change in the corresponding weak symbol. This is the way other
- ELF linkers work as well, and seems to be a result of the shared
- library model.
-
- I will clarify this issue. Most SVR4 shared libraries define the
- variable _timezone and define timezone as a weak synonym. The
- tzset call changes _timezone. If you write
- extern int timezone;
- int _timezone = 5;
- int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
- you might expect that, since timezone is a synonym for _timezone,
- the same number will print both times. However, if the processor
- backend uses a COPY reloc, then actually timezone will be copied
- into your process image, and, since you define _timezone
- yourself, _timezone will not. Thus timezone and _timezone will
- wind up at different memory locations. The tzset call will set
- _timezone, leaving timezone unchanged. */
-
- if (h->weakdef != NULL)
- {
- struct elf_link_hash_entry *weakdef;
-
- BFD_ASSERT (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak);
- weakdef = h->weakdef;
- BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined
- || weakdef->root.type == bfd_link_hash_defweak);
- BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
- if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- {
- /* This symbol is defined by a regular object file, so we
- will not do anything special. Clear weakdef for the
- convenience of the processor backend. */
- h->weakdef = NULL;
- }
- else
- {
- /* There is an implicit reference by a regular object file
- via the weak symbol. */
- weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
- if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif))
- return false;
- }
- }
-
- dynobj = elf_hash_table (eif->info)->dynobj;
- bed = get_elf_backend_data (dynobj);
- if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
- {
- eif->failed = true;
- return false;
- }
-
- return true;
-}
-\f
-/* Final phase of ELF linker. */
-
-/* A structure we use to avoid passing large numbers of arguments. */
-
-struct elf_final_link_info
-{
- /* General link information. */
- struct bfd_link_info *info;
- /* Output BFD. */
- bfd *output_bfd;
- /* Symbol string table. */
- struct bfd_strtab_hash *symstrtab;
- /* .dynsym section. */
- asection *dynsym_sec;
- /* .hash section. */
- asection *hash_sec;
- /* Buffer large enough to hold contents of any section. */
- bfd_byte *contents;
- /* Buffer large enough to hold external relocs of any section. */
- PTR external_relocs;
- /* Buffer large enough to hold internal relocs of any section. */
- Elf_Internal_Rela *internal_relocs;
- /* Buffer large enough to hold external local symbols of any input
- BFD. */
- Elf_External_Sym *external_syms;
- /* Buffer large enough to hold internal local symbols of any input
- BFD. */
- Elf_Internal_Sym *internal_syms;
- /* Array large enough to hold a symbol index for each local symbol
- of any input BFD. */
- long *indices;
- /* Array large enough to hold a section pointer for each local
- symbol of any input BFD. */
- asection **sections;
- /* Buffer to hold swapped out symbols. */
- Elf_External_Sym *symbuf;
- /* Number of swapped out symbols in buffer. */
- size_t symbuf_count;
- /* Number of symbols which fit in symbuf. */
- size_t symbuf_size;
-};
-
-static boolean elf_link_output_sym
- PARAMS ((struct elf_final_link_info *, const char *,
- Elf_Internal_Sym *, asection *));
-static boolean elf_link_flush_output_syms
- PARAMS ((struct elf_final_link_info *));
-static boolean elf_link_output_extsym
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_input_bfd
- PARAMS ((struct elf_final_link_info *, bfd *));
-static boolean elf_reloc_link_order
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- struct bfd_link_order *));
-
-/* This struct is used to pass information to routines called via
- elf_link_hash_traverse which must return failure. */
-
-struct elf_finfo_failed
-{
- boolean failed;
- struct elf_final_link_info *finfo;
-};
-
-/* Do the final step of an ELF link. */
-
-boolean
-elf_bfd_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- bfd *dynobj;
- struct elf_final_link_info finfo;
- register asection *o;
- register struct bfd_link_order *p;
- register bfd *sub;
- size_t max_contents_size;
- size_t max_external_reloc_size;
- size_t max_internal_reloc_count;
- size_t max_sym_count;
- file_ptr off;
- Elf_Internal_Sym elfsym;
- unsigned int i;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- struct elf_finfo_failed eif;
-
- if (info->shared)
- abfd->flags |= DYNAMIC;
-
- dynamic = elf_hash_table (info)->dynamic_sections_created;
- dynobj = elf_hash_table (info)->dynobj;
-
- finfo.info = info;
- finfo.output_bfd = abfd;
- finfo.symstrtab = elf_stringtab_init ();
- if (finfo.symstrtab == NULL)
- return false;
- if (! dynamic)
- {
- finfo.dynsym_sec = NULL;
- finfo.hash_sec = NULL;
- }
- else
- {
- finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
- finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
- BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL);
- }
- finfo.contents = NULL;
- finfo.external_relocs = NULL;
- finfo.internal_relocs = NULL;
- finfo.external_syms = NULL;
- finfo.internal_syms = NULL;
- finfo.indices = NULL;
- finfo.sections = NULL;
- finfo.symbuf = NULL;
- finfo.symbuf_count = 0;
-
- /* Count up the number of relocations we will output for each output
- section, so that we know the sizes of the reloc sections. We
- also figure out some maximum sizes. */
- max_contents_size = 0;
- max_external_reloc_size = 0;
- max_internal_reloc_count = 0;
- max_sym_count = 0;
- for (o = abfd->sections; o != (asection *) NULL; o = o->next)
- {
- o->reloc_count = 0;
+ if (bfd_seek (abfd, hdr->sh_offset, SEEK_SET) == -1)
+ return -1;
- for (p = o->link_order_head; p != NULL; p = p->next)
+ symbase = ((elf_symbol_type *)
+ bfd_zalloc (abfd, symcount * sizeof (elf_symbol_type)));
+ if (symbase == (elf_symbol_type *) NULL)
{
- if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- ++o->reloc_count;
- else if (p->type == bfd_indirect_link_order)
- {
- asection *sec;
-
- sec = p->u.indirect.section;
-
- if (info->relocateable)
- o->reloc_count += sec->reloc_count;
-
- if (sec->_raw_size > max_contents_size)
- max_contents_size = sec->_raw_size;
- if (sec->_cooked_size > max_contents_size)
- max_contents_size = sec->_cooked_size;
-
- /* We are interested in just local symbols, not all
- symbols. */
- if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour)
- {
- size_t sym_count;
-
- if (elf_bad_symtab (sec->owner))
- sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
- / sizeof (Elf_External_Sym));
- else
- sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
-
- if (sym_count > max_sym_count)
- max_sym_count = sym_count;
-
- if ((sec->flags & SEC_RELOC) != 0)
- {
- size_t ext_size;
-
- ext_size = elf_section_data (sec)->rel_hdr.sh_size;
- if (ext_size > max_external_reloc_size)
- max_external_reloc_size = ext_size;
- if (sec->reloc_count > max_internal_reloc_count)
- max_internal_reloc_count = sec->reloc_count;
- }
- }
- }
+ bfd_set_error (bfd_error_no_memory);
+ return -1;
}
+ sym = symbase;
- if (o->reloc_count > 0)
- o->flags |= SEC_RELOC;
- else
+ /* Temporarily allocate room for the raw ELF symbols. */
+ x_symp = ((Elf_External_Sym *)
+ malloc (symcount * sizeof (Elf_External_Sym)));
+ if (x_symp == NULL && symcount != 0)
{
- /* Explicitly clear the SEC_RELOC flag. The linker tends to
- set it (this is probably a bug) and if it is set
- assign_section_numbers will create a reloc section. */
- o->flags &=~ SEC_RELOC;
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
}
- /* If the SEC_ALLOC flag is not set, force the section VMA to
- zero. This is done in elf_fake_sections as well, but forcing
- the VMA to 0 here will ensure that relocs against these
- sections are handled correctly. */
- if ((o->flags & SEC_ALLOC) == 0)
- o->vma = 0;
- }
-
- /* Figure out the file positions for everything but the symbol table
- and the relocs. We set symcount to force assign_section_numbers
- to create a symbol table. */
- abfd->symcount = info->strip == strip_all ? 0 : 1;
- BFD_ASSERT (! abfd->output_has_begun);
- if (! elf_compute_section_file_positions (abfd, info))
- goto error_return;
-
- /* That created the reloc sections. Set their sizes, and assign
- them file positions, and allocate some buffers. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0)
+ if (bfd_read ((PTR) x_symp, sizeof (Elf_External_Sym), symcount, abfd)
+ != symcount * sizeof (Elf_External_Sym))
+ goto error_return;
+ /* Skip first symbol, which is a null dummy. */
+ for (i = 1; i < symcount; i++)
{
- Elf_Internal_Shdr *rel_hdr;
- register struct elf_link_hash_entry **p, **pend;
-
- rel_hdr = &elf_section_data (o)->rel_hdr;
-
- rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count;
-
- /* The contents field must last into write_object_contents,
- so we allocate it with bfd_alloc rather than malloc. */
- rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
- if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- p = ((struct elf_link_hash_entry **)
- malloc (o->reloc_count
- * sizeof (struct elf_link_hash_entry *)));
- if (p == NULL && o->reloc_count != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- elf_section_data (o)->rel_hashes = p;
- pend = p + o->reloc_count;
- for (; p < pend; p++)
- *p = NULL;
-
- /* Use the reloc_count field as an index when outputting the
- relocs. */
- o->reloc_count = 0;
- }
- }
-
- assign_file_positions_for_relocs (abfd);
-
- /* We have now assigned file positions for all the sections except
- .symtab and .strtab. We start the .symtab section at the current
- file position, and write directly to it. We build the .strtab
- section in memory. When we add .dynsym support, we will build
- that in memory as well (.dynsym is smaller than .symtab). */
- abfd->symcount = 0;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- /* sh_name is set in prep_headers. */
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_flags = 0;
- symtab_hdr->sh_addr = 0;
- symtab_hdr->sh_size = 0;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
- /* sh_link is set in assign_section_numbers. */
- /* sh_info is set below. */
- /* sh_offset is set just below. */
- symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */
-
- off = elf_tdata (abfd)->next_file_pos;
- off = assign_file_position_for_section (symtab_hdr, off, true);
-
- /* Note that at this point elf_tdata (abfd)->next_file_pos is
- incorrect. We do not yet know the size of the .symtab section.
- We correct next_file_pos below, after we do know the size. */
-
- /* Allocate a buffer to hold swapped out symbols. This is to avoid
- continuously seeking to the right position in the file. */
- if (! info->keep_memory || max_sym_count < 20)
- finfo.symbuf_size = 20;
- else
- finfo.symbuf_size = max_sym_count;
- finfo.symbuf = ((Elf_External_Sym *)
- malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
- if (finfo.symbuf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* Start writing out the symbol table. The first symbol is always a
- dummy symbol. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = 0;
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_UNDEF;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, bfd_und_section_ptr))
- goto error_return;
-
-#if 0
- /* Some standard ELF linkers do this, but we don't because it causes
- bootstrap comparison failures. */
- /* Output a file symbol for the output file as the second symbol.
- We output this even if we are discarding local symbols, although
- I'm not sure if this is correct. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_ABS;
- if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd),
- &elfsym, bfd_abs_section_ptr))
- goto error_return;
+ elf_swap_symbol_in (abfd, x_symp + i, &i_sym);
+ memcpy (&sym->internal_elf_sym, &i_sym, sizeof (Elf_Internal_Sym));
+#ifdef ELF_KEEP_EXTSYM
+ memcpy (&sym->native_elf_sym, x_symp + i, sizeof (Elf_External_Sym));
#endif
+ sym->symbol.the_bfd = abfd;
- /* Output a symbol for each section. We output these even if we are
- discarding local symbols, since they are used for relocs. These
- symbols have no names. We store the index of each one in the
- index field of the section, so that we can find it again when
- outputting relocs. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- elfsym.st_other = 0;
- for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
- {
- o = section_from_elf_index (abfd, i);
- if (o != NULL)
- o->target_index = abfd->symcount;
- elfsym.st_shndx = i;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, o))
- goto error_return;
- }
+ sym->symbol.name = bfd_elf_string_from_elf_section (abfd,
+ hdr->sh_link,
+ i_sym.st_name);
- /* Allocate some memory to hold information read in from the input
- files. */
- finfo.contents = (bfd_byte *) malloc (max_contents_size);
- finfo.external_relocs = (PTR) malloc (max_external_reloc_size);
- finfo.internal_relocs = ((Elf_Internal_Rela *)
- malloc (max_internal_reloc_count
- * sizeof (Elf_Internal_Rela)));
- finfo.external_syms = ((Elf_External_Sym *)
- malloc (max_sym_count * sizeof (Elf_External_Sym)));
- finfo.internal_syms = ((Elf_Internal_Sym *)
- malloc (max_sym_count * sizeof (Elf_Internal_Sym)));
- finfo.indices = (long *) malloc (max_sym_count * sizeof (long));
- finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *));
- if ((finfo.contents == NULL && max_contents_size != 0)
- || (finfo.external_relocs == NULL && max_external_reloc_size != 0)
- || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
- || (finfo.external_syms == NULL && max_sym_count != 0)
- || (finfo.internal_syms == NULL && max_sym_count != 0)
- || (finfo.indices == NULL && max_sym_count != 0)
- || (finfo.sections == NULL && max_sym_count != 0))
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ sym->symbol.value = i_sym.st_value;
- /* Since ELF permits relocations to be against local symbols, we
- must have the local symbols available when we do the relocations.
- Since we would rather only read the local symbols once, and we
- would rather not keep them in memory, we handle all the
- relocations for a single input file at the same time.
-
- Unfortunately, there is no way to know the total number of local
- symbols until we have seen all of them, and the local symbol
- indices precede the global symbol indices. This means that when
- we are generating relocateable output, and we see a reloc against
- a global symbol, we can not know the symbol index until we have
- finished examining all the local symbols to see which ones we are
- going to output. To deal with this, we keep the relocations in
- memory, and don't output them until the end of the link. This is
- an unfortunate waste of memory, but I don't see a good way around
- it. Fortunately, it only happens when performing a relocateable
- link, which is not the common case. FIXME: If keep_memory is set
- we could write the relocs out and then read them again; I don't
- know how bad the memory loss will be. */
-
- for (sub = info->input_bfds; sub != NULL; sub = sub->next)
- sub->output_has_begun = false;
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->link_order_head; p != NULL; p = p->next)
- {
- if (p->type == bfd_indirect_link_order
- && (bfd_get_flavour (p->u.indirect.section->owner)
- == bfd_target_elf_flavour))
+ if (i_sym.st_shndx > 0 && i_sym.st_shndx < SHN_LORESERVE)
{
- sub = p->u.indirect.section->owner;
- if (! sub->output_has_begun)
+ sym->symbol.section = section_from_elf_index (abfd,
+ i_sym.st_shndx);
+ if (sym->symbol.section == NULL)
{
- if (! elf_link_input_bfd (&finfo, sub))
- goto error_return;
- sub->output_has_begun = true;
+ /* This symbol is in a section for which we did not
+ create a BFD section. Just use bfd_abs_section,
+ although it is wrong. FIXME. */
+ sym->symbol.section = bfd_abs_section_ptr;
}
}
- else if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
+ else if (i_sym.st_shndx == SHN_ABS)
{
- if (! elf_reloc_link_order (abfd, info, o, p))
- goto error_return;
+ sym->symbol.section = bfd_abs_section_ptr;
}
- else
+ else if (i_sym.st_shndx == SHN_COMMON)
{
- if (! _bfd_default_link_order (abfd, info, o, p))
- goto error_return;
+ sym->symbol.section = bfd_com_section_ptr;
+ /* Elf puts the alignment into the `value' field, and
+ the size into the `size' field. BFD wants to see the
+ size in the value field, and doesn't care (at the
+ moment) about the alignment. */
+ sym->symbol.value = i_sym.st_size;
}
- }
- }
-
- /* That wrote out all the local symbols. Finish up the symbol table
- with the global symbols. */
-
- /* The sh_info field records the index of the first non local
- symbol. */
- symtab_hdr->sh_info = abfd->symcount;
- if (dynamic)
- elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1;
-
- /* We get the global symbols from the hash table. */
- eif.failed = false;
- eif.finfo = &finfo;
- elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
- (PTR) &eif);
- if (eif.failed)
- return false;
-
- /* Flush all symbols to the file. */
- if (! elf_link_flush_output_syms (&finfo))
- return false;
-
- /* Now we know the size of the symtab section. */
- off += symtab_hdr->sh_size;
-
- /* Finish up and write out the symbol string table (.strtab)
- section. */
- symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
- /* sh_name was set in prep_headers. */
- symstrtab_hdr->sh_type = SHT_STRTAB;
- symstrtab_hdr->sh_flags = 0;
- symstrtab_hdr->sh_addr = 0;
- symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
- symstrtab_hdr->sh_entsize = 0;
- symstrtab_hdr->sh_link = 0;
- symstrtab_hdr->sh_info = 0;
- /* sh_offset is set just below. */
- symstrtab_hdr->sh_addralign = 1;
-
- off = assign_file_position_for_section (symstrtab_hdr, off, true);
- elf_tdata (abfd)->next_file_pos = off;
-
- if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
- return false;
-
- /* Adjust the relocs to have the correct symbol indices. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- struct elf_link_hash_entry **rel_hash;
- Elf_Internal_Shdr *rel_hdr;
-
- if ((o->flags & SEC_RELOC) == 0)
- continue;
-
- rel_hash = elf_section_data (o)->rel_hashes;
- rel_hdr = &elf_section_data (o)->rel_hdr;
- for (i = 0; i < o->reloc_count; i++, rel_hash++)
- {
- if (*rel_hash == NULL)
- continue;
-
- BFD_ASSERT ((*rel_hash)->indx >= 0);
-
- if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ else if (i_sym.st_shndx == SHN_UNDEF)
{
- Elf_External_Rel *erel;
- Elf_Internal_Rel irel;
-
- erel = (Elf_External_Rel *) rel_hdr->contents + i;
- elf_swap_reloc_in (abfd, erel, &irel);
- irel.r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irel.r_info));
- elf_swap_reloc_out (abfd, &irel, erel);
+ sym->symbol.section = bfd_und_section_ptr;
}
else
- {
- Elf_External_Rela *erela;
- Elf_Internal_Rela irela;
-
- BFD_ASSERT (rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) rel_hdr->contents + i;
- elf_swap_reloca_in (abfd, erela, &irela);
- irela.r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irela.r_info));
- elf_swap_reloca_out (abfd, &irela, erela);
- }
- }
-
- /* Set the reloc_count field to 0 to prevent write_relocs from
- trying to swap the relocs out itself. */
- o->reloc_count = 0;
- }
-
- /* If we are linking against a dynamic object, or generating a
- shared library, finish up the dynamic linking information. */
- if (dynamic)
- {
- Elf_External_Dyn *dyncon, *dynconend;
-
- /* Fix up .dynamic entries. */
- o = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (o != NULL);
-
- dyncon = (Elf_External_Dyn *) o->contents;
- dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- const char *name;
- unsigned int type;
+ sym->symbol.section = bfd_abs_section_ptr;
- elf_swap_dyn_in (dynobj, dyncon, &dyn);
+ sym->symbol.value -= sym->symbol.section->vma;
- switch (dyn.d_tag)
+ switch (ELF_ST_BIND (i_sym.st_info))
{
- default:
- break;
-
- /* SVR4 linkers seem to set DT_INIT and DT_FINI based on
- magic _init and _fini symbols. This is pretty ugly,
- but we are compatible. */
- case DT_INIT:
- name = "_init";
- goto get_sym;
- case DT_FINI:
- name = "_fini";
- get_sym:
- {
- struct elf_link_hash_entry *h;
-
- h = elf_link_hash_lookup (elf_hash_table (info), name,
- false, false, true);
- BFD_ASSERT (h != NULL);
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- dyn.d_un.d_val = h->root.u.def.value;
- o = h->root.u.def.section;
- if (o->output_section != NULL)
- dyn.d_un.d_val += (o->output_section->vma
- + o->output_offset);
- else
- /* The symbol is imported from another shared
- library and does not apply to this one. */
- dyn.d_un.d_val = 0;
- }
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- }
+ case STB_LOCAL:
+ sym->symbol.flags |= BSF_LOCAL;
break;
-
- case DT_HASH:
- name = ".hash";
- goto get_vma;
- case DT_STRTAB:
- name = ".dynstr";
- goto get_vma;
- case DT_SYMTAB:
- name = ".dynsym";
- get_vma:
- o = bfd_get_section_by_name (abfd, name);
- BFD_ASSERT (o != NULL);
- dyn.d_un.d_ptr = o->vma;
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ case STB_GLOBAL:
+ if (i_sym.st_shndx != SHN_UNDEF
+ && i_sym.st_shndx != SHN_COMMON)
+ sym->symbol.flags |= BSF_GLOBAL;
break;
-
- case DT_REL:
- case DT_RELA:
- case DT_RELSZ:
- case DT_RELASZ:
- if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
- type = SHT_REL;
- else
- type = SHT_RELA;
- dyn.d_un.d_val = 0;
- for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = elf_elfsections (abfd)[i];
- if (hdr->sh_type == type
- && (hdr->sh_flags & SHF_ALLOC) != 0)
- {
- if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
- dyn.d_un.d_val += hdr->sh_size;
- else
- {
- if (dyn.d_un.d_val == 0
- || hdr->sh_addr < dyn.d_un.d_val)
- dyn.d_un.d_val = hdr->sh_addr;
- }
- }
- }
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ case STB_WEAK:
+ sym->symbol.flags |= BSF_WEAK;
break;
}
- }
- }
-
- /* If we have created any dynamic sections, then output them. */
- if (dynobj != NULL)
- {
- if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
- goto error_return;
- for (o = dynobj->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_HAS_CONTENTS) == 0
- || o->_raw_size == 0)
- continue;
- if ((o->flags & SEC_IN_MEMORY) == 0)
- {
- /* At this point, we are only interested in sections
- created by elf_link_create_dynamic_sections. FIXME:
- This test is fragile. */
- continue;
- }
- if ((elf_section_data (o->output_section)->this_hdr.sh_type
- != SHT_STRTAB)
- || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
- {
- if (! bfd_set_section_contents (abfd, o->output_section,
- o->contents, o->output_offset,
- o->_raw_size))
- goto error_return;
- }
- else
+ switch (ELF_ST_TYPE (i_sym.st_info))
{
- file_ptr off;
-
- /* The contents of the .dynstr section are actually in a
- stringtab. */
- off = elf_section_data (o->output_section)->this_hdr.sh_offset;
- if (bfd_seek (abfd, off, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd,
- elf_hash_table (info)->dynstr))
- goto error_return;
+ case STT_SECTION:
+ sym->symbol.flags |= BSF_SECTION_SYM | BSF_DEBUGGING;
+ break;
+ case STT_FILE:
+ sym->symbol.flags |= BSF_FILE | BSF_DEBUGGING;
+ break;
+ case STT_FUNC:
+ sym->symbol.flags |= BSF_FUNCTION;
+ break;
}
- }
- }
-
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
- }
- elf_tdata (abfd)->linker = true;
+ if (dynamic)
+ sym->symbol.flags |= BSF_DYNAMIC;
- return true;
+ /* Do some backend-specific processing on this symbol. */
+ {
+ struct elf_backend_data *ebd = get_elf_backend_data (abfd);
+ if (ebd->elf_backend_symbol_processing)
+ (*ebd->elf_backend_symbol_processing) (abfd, &sym->symbol);
+ }
- error_return:
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
+ sym++;
+ }
}
- return false;
-}
+ /* Do some backend-specific processing on this symbol table. */
+ {
+ struct elf_backend_data *ebd = get_elf_backend_data (abfd);
+ if (ebd->elf_backend_symbol_table_processing)
+ (*ebd->elf_backend_symbol_table_processing) (abfd, symbase, symcount);
+ }
-/* Add a symbol to the output symbol table. */
+ /* We rely on the zalloc to clear out the final symbol entry. */
-static boolean
-elf_link_output_sym (finfo, name, elfsym, input_sec)
- struct elf_final_link_info *finfo;
- const char *name;
- Elf_Internal_Sym *elfsym;
- asection *input_sec;
-{
- boolean (*output_symbol_hook) PARAMS ((bfd *,
- struct bfd_link_info *info,
- const char *,
- Elf_Internal_Sym *,
- asection *));
-
- output_symbol_hook = get_elf_backend_data (finfo->output_bfd)->
- elf_backend_link_output_symbol_hook;
- if (output_symbol_hook != NULL)
- {
- if (! ((*output_symbol_hook)
- (finfo->output_bfd, finfo->info, name, elfsym, input_sec)))
- return false;
- }
+ symcount = sym - symbase;
- if (name == (const char *) NULL || *name == '\0')
- elfsym->st_name = 0;
- else
+ /* Fill in the user's symbol pointer vector if needed. */
+ if (symptrs)
{
- elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
- name, true,
- false);
- if (elfsym->st_name == (unsigned long) -1)
- return false;
- }
+ long l = symcount;
- if (finfo->symbuf_count >= finfo->symbuf_size)
- {
- if (! elf_link_flush_output_syms (finfo))
- return false;
+ sym = symbase;
+ while (l-- > 0)
+ {
+ *symptrs++ = &sym->symbol;
+ sym++;
+ }
+ *symptrs = 0; /* Final null pointer */
}
- elf_swap_symbol_out (finfo->output_bfd, elfsym,
- finfo->symbuf + finfo->symbuf_count);
- ++finfo->symbuf_count;
-
- ++finfo->output_bfd->symcount;
-
- return true;
-}
-
-/* Flush the output symbols to the file. */
-
-static boolean
-elf_link_flush_output_syms (finfo)
- struct elf_final_link_info *finfo;
-{
- Elf_Internal_Shdr *symtab;
-
- symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr;
-
- if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size,
- SEEK_SET) != 0
- || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count,
- sizeof (Elf_External_Sym), finfo->output_bfd)
- != finfo->symbuf_count * sizeof (Elf_External_Sym)))
- return false;
-
- symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym);
-
- finfo->symbuf_count = 0;
-
- return true;
+ if (x_symp != NULL)
+ free (x_symp);
+ return symcount;
+error_return:
+ if (x_symp != NULL)
+ free (x_symp);
+ return -1;
}
-/* Add an external symbol to the symbol table. This is called from
- the hash table traversal routine. */
+/* Read in and swap the external relocs. */
static boolean
-elf_link_output_extsym (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
+elf_slurp_reloc_table (abfd, asect, symbols)
+ bfd *abfd;
+ asection *asect;
+ asymbol **symbols;
{
- struct elf_finfo_failed *eif = (struct elf_finfo_failed *) data;
- struct elf_final_link_info *finfo = eif->finfo;
- boolean strip;
- Elf_Internal_Sym sym;
- asection *input_sec;
-
- /* If we are not creating a shared library, and this symbol is
- referenced by a shared library but is not defined anywhere, then
- warn that it is undefined. If we do not do this, the runtime
- linker will complain that the symbol is undefined when the
- program is run. We don't have to worry about symbols that are
- referenced by regular files, because we will already have issued
- warnings for them. */
- if (! finfo->info->relocateable
- && ! finfo->info->shared
- && h->root.type == bfd_link_hash_undefined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- {
- if (! ((*finfo->info->callbacks->undefined_symbol)
- (finfo->info, h->root.root.string, h->root.u.undef.abfd,
- (asection *) NULL, 0)))
- {
- eif->failed = true;
- return false;
- }
- }
-
- /* We don't want to output symbols that have never been mentioned by
- a regular file, or that we have been told to strip. However, if
- h->indx is set to -2, the symbol is used by a reloc and we must
- output it. */
- if (h->indx == -2)
- strip = false;
- else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- strip = true;
- else if (finfo->info->strip == strip_all
- || (finfo->info->strip == strip_some
- && bfd_hash_lookup (finfo->info->keep_hash,
- h->root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
+ struct elf_backend_data * const ebd = get_elf_backend_data (abfd);
+ struct bfd_elf_section_data * const d = elf_section_data (asect);
+ PTR allocated = NULL;
+ bfd_byte *native_relocs;
+ arelent *relents;
+ arelent *relent;
+ unsigned int i;
+ int entsize;
- /* If we're stripping it, and it's not a dynamic symbol, there's
- nothing else to do. */
- if (strip && h->dynindx == -1)
+ if (asect->relocation != NULL
+ || (asect->flags & SEC_RELOC) == 0
+ || asect->reloc_count == 0)
return true;
- sym.st_value = 0;
- sym.st_size = h->size;
- sym.st_other = 0;
- if (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_defweak)
- sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
- else
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
+ BFD_ASSERT (asect->rel_filepos == d->rel_hdr.sh_offset
+ && (asect->reloc_count
+ == d->rel_hdr.sh_size / d->rel_hdr.sh_entsize));
- switch (h->root.type)
+ allocated = (PTR) malloc (d->rel_hdr.sh_size);
+ if (allocated == NULL)
{
- default:
- case bfd_link_hash_new:
- abort ();
- return false;
-
- case bfd_link_hash_undefined:
- input_sec = bfd_und_section_ptr;
- sym.st_shndx = SHN_UNDEF;
- break;
-
- case bfd_link_hash_undefweak:
- input_sec = bfd_und_section_ptr;
- sym.st_shndx = SHN_UNDEF;
- break;
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- {
- input_sec = h->root.u.def.section;
- if (input_sec->output_section != NULL)
- {
- sym.st_shndx =
- elf_section_from_bfd_section (finfo->output_bfd,
- input_sec->output_section);
- if (sym.st_shndx == (unsigned short) -1)
- {
- eif->failed = true;
- return false;
- }
-
- /* ELF symbols in relocateable files are section relative,
- but in nonrelocateable files they are virtual
- addresses. */
- sym.st_value = h->root.u.def.value + input_sec->output_offset;
- if (! finfo->info->relocateable)
- sym.st_value += input_sec->output_section->vma;
- }
- else
- {
- BFD_ASSERT ((bfd_get_flavour (input_sec->owner)
- == bfd_target_elf_flavour)
- && elf_elfheader (input_sec->owner)->e_type == ET_DYN);
- sym.st_shndx = SHN_UNDEF;
- input_sec = bfd_und_section_ptr;
- }
- }
- break;
+ if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0
+ || (bfd_read (allocated, 1, d->rel_hdr.sh_size, abfd)
+ != d->rel_hdr.sh_size))
+ goto error_return;
- case bfd_link_hash_common:
- input_sec = bfd_com_section_ptr;
- sym.st_shndx = SHN_COMMON;
- sym.st_value = 1 << h->root.u.c.p->alignment_power;
- break;
+ native_relocs = (bfd_byte *) allocated;
- case bfd_link_hash_indirect:
- case bfd_link_hash_warning:
- /* I have no idea how these should be handled. */
- return true;
+ relents = ((arelent *)
+ bfd_alloc (abfd, asect->reloc_count * sizeof (arelent)));
+ if (relents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
}
- /* If this symbol should be put in the .dynsym section, then put it
- there now. We have already know the symbol index. We also fill
- in the entry in the .hash section. */
- if (h->dynindx != -1
- && elf_hash_table (finfo->info)->dynamic_sections_created)
+ entsize = d->rel_hdr.sh_entsize;
+ BFD_ASSERT (entsize == sizeof (Elf_External_Rel)
+ || entsize == sizeof (Elf_External_Rela));
+
+ for (i = 0, relent = relents;
+ i < asect->reloc_count;
+ i++, relent++, native_relocs += entsize)
{
- struct elf_backend_data *bed;
- size_t bucketcount;
- size_t bucket;
- bfd_byte *bucketpos;
- bfd_vma chain;
-
- sym.st_name = h->dynstr_index;
-
- /* Give the processor backend a chance to tweak the symbol
- value, and also to finish up anything that needs to be done
- for this symbol. */
- bed = get_elf_backend_data (finfo->output_bfd);
- if (! ((*bed->elf_backend_finish_dynamic_symbol)
- (finfo->output_bfd, finfo->info, h, &sym)))
+ Elf_Internal_Rela rela;
+ Elf_Internal_Rel rel;
+
+ if (entsize == sizeof (Elf_External_Rela))
+ elf_swap_reloca_in (abfd, (Elf_External_Rela *) native_relocs, &rela);
+ else
{
- eif->failed = true;
- return false;
+ elf_swap_reloc_in (abfd, (Elf_External_Rel *) native_relocs, &rel);
+ rela.r_offset = rel.r_offset;
+ rela.r_info = rel.r_info;
+ rela.r_addend = 0;
}
- elf_swap_symbol_out (finfo->output_bfd, &sym,
- ((Elf_External_Sym *) finfo->dynsym_sec->contents
- + h->dynindx));
-
- bucketcount = elf_hash_table (finfo->info)->bucketcount;
- bucket = (bfd_elf_hash ((const unsigned char *) h->root.root.string)
- % bucketcount);
- bucketpos = ((bfd_byte *) finfo->hash_sec->contents
- + (bucket + 2) * (ARCH_SIZE / 8));
- chain = get_word (finfo->output_bfd, bucketpos);
- put_word (finfo->output_bfd, h->dynindx, bucketpos);
- put_word (finfo->output_bfd, chain,
- ((bfd_byte *) finfo->hash_sec->contents
- + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8)));
- }
-
- /* If we're stripping it, then it was just a dynamic symbol, and
- there's nothing else to do. */
- if (strip)
- return true;
-
- h->indx = finfo->output_bfd->symcount;
+ /* The address of an ELF reloc is section relative for an object
+ file, and absolute for an executable file or shared library.
+ The address of a BFD reloc is always section relative. */
+ if ((abfd->flags & (EXEC_P | DYNAMIC)) == 0)
+ relent->address = rela.r_offset;
+ else
+ relent->address = rela.r_offset - asect->vma;
- if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec))
- {
- eif->failed = true;
- return false;
- }
+ if (ELF_R_SYM (rela.r_info) == 0)
+ relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ else
+ {
+ asymbol **ps, *s;
- return true;
-}
+ ps = symbols + ELF_R_SYM (rela.r_info) - 1;
+ s = *ps;
-/* Link an input file into the linker output file. This function
- handles all the sections and relocations of the input file at once.
- This is so that we only have to read the local symbols once, and
- don't have to keep them in memory. */
+ /* Canonicalize ELF section symbols. FIXME: Why? */
+ if ((s->flags & BSF_SECTION_SYM) == 0)
+ relent->sym_ptr_ptr = ps;
+ else
+ relent->sym_ptr_ptr = s->section->symbol_ptr_ptr;
+ }
-static boolean
-elf_link_input_bfd (finfo, input_bfd)
- struct elf_final_link_info *finfo;
- bfd *input_bfd;
-{
- boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
- bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *,
- Elf_Internal_Sym *, asection **));
- bfd *output_bfd;
- Elf_Internal_Shdr *symtab_hdr;
- size_t locsymcount;
- size_t extsymoff;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
- Elf_Internal_Sym *isym;
- long *pindex;
- asection **ppsection;
- asection *o;
-
- output_bfd = finfo->output_bfd;
- relocate_section =
- get_elf_backend_data (output_bfd)->elf_backend_relocate_section;
-
- /* If this is a dynamic object, we don't want to do anything here:
- we don't want the local symbols, and we don't want the section
- contents. */
- if (elf_elfheader (input_bfd)->e_type == ET_DYN)
- return true;
+ relent->addend = rela.r_addend;
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- if (elf_bad_symtab (input_bfd))
- {
- locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- extsymoff = 0;
- }
- else
- {
- locsymcount = symtab_hdr->sh_info;
- extsymoff = symtab_hdr->sh_info;
+ if (entsize == sizeof (Elf_External_Rela))
+ (*ebd->elf_info_to_howto) (abfd, relent, &rela);
+ else
+ (*ebd->elf_info_to_howto_rel) (abfd, relent, &rel);
}
- /* Read the local symbols. */
- if (locsymcount > 0
- && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym),
- locsymcount, input_bfd)
- != locsymcount * sizeof (Elf_External_Sym))))
- return false;
+ asect->relocation = relents;
- /* Swap in the local symbols and write out the ones which we know
- are going into the output file. */
- esym = finfo->external_syms;
- esymend = esym + locsymcount;
- isym = finfo->internal_syms;
- pindex = finfo->indices;
- ppsection = finfo->sections;
- for (; esym < esymend; esym++, isym++, pindex++, ppsection++)
- {
- asection *isec;
- const char *name;
- Elf_Internal_Sym osym;
+ if (allocated != NULL)
+ free (allocated);
- elf_swap_symbol_in (input_bfd, esym, isym);
- *pindex = -1;
+ return true;
- if (elf_bad_symtab (input_bfd))
- {
- if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
- {
- *ppsection = NULL;
- continue;
- }
- }
+ error_return:
+ if (allocated != NULL)
+ free (allocated);
+ return false;
+}
- if (isym->st_shndx == SHN_UNDEF)
- isec = bfd_und_section_ptr;
- else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE)
- isec = section_from_elf_index (input_bfd, isym->st_shndx);
- else if (isym->st_shndx == SHN_ABS)
- isec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- isec = bfd_com_section_ptr;
- else
- {
- /* Who knows? */
- isec = NULL;
- }
+#ifdef DEBUG
+static void
+elf_debug_section (num, hdr)
+ int num;
+ Elf_Internal_Shdr *hdr;
+{
+ fprintf (stderr, "\nSection#%d '%s' 0x%.8lx\n", num,
+ hdr->bfd_section != NULL ? hdr->bfd_section->name : "",
+ (long) hdr);
+ fprintf (stderr,
+ "sh_name = %ld\tsh_type = %ld\tsh_flags = %ld\n",
+ (long) hdr->sh_name,
+ (long) hdr->sh_type,
+ (long) hdr->sh_flags);
+ fprintf (stderr,
+ "sh_addr = %ld\tsh_offset = %ld\tsh_size = %ld\n",
+ (long) hdr->sh_addr,
+ (long) hdr->sh_offset,
+ (long) hdr->sh_size);
+ fprintf (stderr,
+ "sh_link = %ld\tsh_info = %ld\tsh_addralign = %ld\n",
+ (long) hdr->sh_link,
+ (long) hdr->sh_info,
+ (long) hdr->sh_addralign);
+ fprintf (stderr, "sh_entsize = %ld\n",
+ (long) hdr->sh_entsize);
+ fflush (stderr);
+}
- *ppsection = isec;
-
- /* Don't output the first, undefined, symbol. */
- if (esym == finfo->external_syms)
- continue;
-
- /* If we are stripping all symbols, we don't want to output this
- one. */
- if (finfo->info->strip == strip_all)
- continue;
-
- /* We never output section symbols. Instead, we use the section
- symbol of the corresponding section in the output file. */
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- continue;
-
- /* If we are discarding all local symbols, we don't want to
- output this one. If we are generating a relocateable output
- file, then some of the local symbols may be required by
- relocs; we output them below as we discover that they are
- needed. */
- if (finfo->info->discard == discard_all)
- continue;
-
- /* Get the name of the symbol. */
- name = elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
- isym->st_name);
- if (name == NULL)
- return false;
-
- /* See if we are discarding symbols with this name. */
- if ((finfo->info->strip == strip_some
- && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
- == NULL))
- || (finfo->info->discard == discard_l
- && strncmp (name, finfo->info->lprefix,
- finfo->info->lprefix_len) == 0))
- continue;
-
- /* If we get here, we are going to output this symbol. */
-
- osym = *isym;
-
- /* Adjust the section index for the output file. */
- osym.st_shndx = elf_section_from_bfd_section (output_bfd,
- isec->output_section);
- if (osym.st_shndx == (unsigned short) -1)
- return false;
-
- *pindex = output_bfd->symcount;
-
- /* ELF symbols in relocateable files are section relative, but
- in executable files they are virtual addresses. Note that
- this code assumes that all ELF sections have an associated
- BFD section with a reasonable value for output_offset; below
- we assume that they also have a reasonable value for
- output_section. Any special sections must be set up to meet
- these requirements. */
- osym.st_value += isec->output_offset;
- if (! finfo->info->relocateable)
- osym.st_value += isec->output_section->vma;
-
- if (! elf_link_output_sym (finfo, name, &osym, isec))
- return false;
- }
+static void
+elf_debug_file (ehdrp)
+ Elf_Internal_Ehdr *ehdrp;
+{
+ fprintf (stderr, "e_entry = 0x%.8lx\n", (long) ehdrp->e_entry);
+ fprintf (stderr, "e_phoff = %ld\n", (long) ehdrp->e_phoff);
+ fprintf (stderr, "e_phnum = %ld\n", (long) ehdrp->e_phnum);
+ fprintf (stderr, "e_phentsize = %ld\n", (long) ehdrp->e_phentsize);
+ fprintf (stderr, "e_shoff = %ld\n", (long) ehdrp->e_shoff);
+ fprintf (stderr, "e_shnum = %ld\n", (long) ehdrp->e_shnum);
+ fprintf (stderr, "e_shentsize = %ld\n", (long) ehdrp->e_shentsize);
+}
- /* Relocate the contents of each section. */
- for (o = input_bfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_HAS_CONTENTS) == 0)
- continue;
+static char *
+elf_symbol_flags (flags)
+ flagword flags;
+{
+ static char buffer[1024];
- if ((o->flags & SEC_IN_MEMORY) != 0
- && input_bfd == elf_hash_table (finfo->info)->dynobj)
- {
- /* Section was created by elf_link_create_dynamic_sections.
- FIXME: This test is fragile. */
- continue;
- }
+ buffer[0] = '\0';
+ if (flags & BSF_LOCAL)
+ strcat (buffer, " local");
- /* Read the contents of the section. */
- if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
- (file_ptr) 0, o->_raw_size))
- return false;
+ if (flags & BSF_GLOBAL)
+ strcat (buffer, " global");
- if ((o->flags & SEC_RELOC) != 0)
- {
- Elf_Internal_Rela *internal_relocs;
-
- /* Get the swapped relocs. */
- internal_relocs = elf_link_read_relocs (input_bfd, o,
- finfo->external_relocs,
- finfo->internal_relocs,
- false);
- if (internal_relocs == NULL
- && o->reloc_count > 0)
- return false;
-
- /* Relocate the section by invoking a back end routine.
-
- The back end routine is responsible for adjusting the
- section contents as necessary, and (if using Rela relocs
- and generating a relocateable output file) adjusting the
- reloc addend as necessary.
-
- The back end routine does not have to worry about setting
- the reloc address or the reloc symbol index.
-
- The back end routine is given a pointer to the swapped in
- internal symbols, and can access the hash table entries
- for the external symbols via elf_sym_hashes (input_bfd).
-
- When generating relocateable output, the back end routine
- must handle STB_LOCAL/STT_SECTION symbols specially. The
- output symbol is going to be a section symbol
- corresponding to the output section, which will require
- the addend to be adjusted. */
-
- if (! (*relocate_section) (output_bfd, finfo->info,
- input_bfd, o,
- finfo->contents,
- internal_relocs,
- finfo->internal_syms,
- finfo->sections))
- return false;
-
- if (finfo->info->relocateable)
- {
- Elf_Internal_Rela *irela;
- Elf_Internal_Rela *irelaend;
- struct elf_link_hash_entry **rel_hash;
- Elf_Internal_Shdr *input_rel_hdr;
- Elf_Internal_Shdr *output_rel_hdr;
-
- /* Adjust the reloc addresses and symbol indices. */
-
- irela = internal_relocs;
- irelaend = irela + o->reloc_count;
- rel_hash = (elf_section_data (o->output_section)->rel_hashes
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, rel_hash++)
- {
- long r_symndx;
- Elf_Internal_Sym *isym;
- asection *sec;
-
- irela->r_offset += o->output_offset;
-
- r_symndx = ELF_R_SYM (irela->r_info);
-
- if (r_symndx == 0)
- continue;
-
- if (r_symndx >= locsymcount
- || (elf_bad_symtab (input_bfd)
- && finfo->sections[r_symndx] == NULL))
- {
- long indx;
-
- /* This is a reloc against a global symbol. We
- have not yet output all the local symbols, so
- we do not know the symbol index of any global
- symbol. We set the rel_hash entry for this
- reloc to point to the global hash table entry
- for this symbol. The symbol index is then
- set at the end of elf_bfd_final_link. */
- indx = r_symndx - extsymoff;
- *rel_hash = elf_sym_hashes (input_bfd)[indx];
-
- /* Setting the index to -2 tells
- elf_link_output_extsym that this symbol is
- used by a reloc. */
- BFD_ASSERT ((*rel_hash)->indx < 0);
- (*rel_hash)->indx = -2;
-
- continue;
- }
-
- /* This is a reloc against a local symbol. */
-
- *rel_hash = NULL;
- isym = finfo->internal_syms + r_symndx;
- sec = finfo->sections[r_symndx];
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- {
- /* I suppose the backend ought to fill in the
- section of any STT_SECTION symbol against a
- processor specific section. */
- if (sec != NULL && bfd_is_abs_section (sec))
- r_symndx = 0;
- else if (sec == NULL || sec->owner == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- {
- r_symndx = sec->output_section->target_index;
- BFD_ASSERT (r_symndx != 0);
- }
- }
- else
- {
- if (finfo->indices[r_symndx] == -1)
- {
- unsigned long link;
- const char *name;
- asection *osec;
-
- if (finfo->info->strip == strip_all)
- {
- /* You can't do ld -r -s. */
- bfd_set_error (bfd_error_invalid_operation);
- return false;
- }
-
- /* This symbol was skipped earlier, but
- since it is needed by a reloc, we
- must output it now. */
- link = symtab_hdr->sh_link;
- name = elf_string_from_elf_section (input_bfd,
- link,
- isym->st_name);
- if (name == NULL)
- return false;
-
- osec = sec->output_section;
- isym->st_shndx =
- elf_section_from_bfd_section (output_bfd,
- osec);
- if (isym->st_shndx == (unsigned short) -1)
- return false;
-
- isym->st_value += sec->output_offset;
- if (! finfo->info->relocateable)
- isym->st_value += osec->vma;
-
- finfo->indices[r_symndx] = output_bfd->symcount;
-
- if (! elf_link_output_sym (finfo, name, isym, sec))
- return false;
- }
-
- r_symndx = finfo->indices[r_symndx];
- }
-
- irela->r_info = ELF_R_INFO (r_symndx,
- ELF_R_TYPE (irela->r_info));
- }
+ if (flags & BSF_DEBUGGING)
+ strcat (buffer, " debug");
- /* Swap out the relocs. */
- input_rel_hdr = &elf_section_data (o)->rel_hdr;
- output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr;
- BFD_ASSERT (output_rel_hdr->sh_entsize
- == input_rel_hdr->sh_entsize);
- irela = internal_relocs;
- irelaend = irela + o->reloc_count;
- if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
-
- erel = ((Elf_External_Rel *) output_rel_hdr->contents
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, erel++)
- {
- Elf_Internal_Rel irel;
-
- irel.r_offset = irela->r_offset;
- irel.r_info = irela->r_info;
- BFD_ASSERT (irela->r_addend == 0);
- elf_swap_reloc_out (output_bfd, &irel, erel);
- }
- }
- else
- {
- Elf_External_Rela *erela;
-
- BFD_ASSERT (input_rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela));
- erela = ((Elf_External_Rela *) output_rel_hdr->contents
- + o->output_section->reloc_count);
- for (; irela < irelaend; irela++, erela++)
- elf_swap_reloca_out (output_bfd, irela, erela);
- }
+ if (flags & BSF_FUNCTION)
+ strcat (buffer, " function");
- o->output_section->reloc_count += o->reloc_count;
- }
- }
+ if (flags & BSF_KEEP)
+ strcat (buffer, " keep");
- /* Write out the modified section contents. */
- if (! bfd_set_section_contents (output_bfd, o->output_section,
- finfo->contents, o->output_offset,
- (o->_cooked_size != 0
- ? o->_cooked_size
- : o->_raw_size)))
- return false;
- }
+ if (flags & BSF_KEEP_G)
+ strcat (buffer, " keep_g");
- return true;
-}
+ if (flags & BSF_WEAK)
+ strcat (buffer, " weak");
-/* Generate a reloc when linking an ELF file. This is a reloc
- requested by the linker, and does come from any input file. This
- is used to build constructor and destructor tables when linking
- with -Ur. */
+ if (flags & BSF_SECTION_SYM)
+ strcat (buffer, " section-sym");
-static boolean
-elf_reloc_link_order (output_bfd, info, output_section, link_order)
- bfd *output_bfd;
- struct bfd_link_info *info;
- asection *output_section;
- struct bfd_link_order *link_order;
-{
- reloc_howto_type *howto;
- long indx;
- bfd_vma offset;
- struct elf_link_hash_entry **rel_hash_ptr;
- Elf_Internal_Shdr *rel_hdr;
-
- howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
- if (howto == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
+ if (flags & BSF_OLD_COMMON)
+ strcat (buffer, " old-common");
- /* If this is an inplace reloc, we must write the addend into the
- object file. */
- if (howto->partial_inplace
- && link_order->u.reloc.p->addend != 0)
- {
- bfd_size_type size;
- bfd_reloc_status_type rstat;
- bfd_byte *buf;
- boolean ok;
-
- size = bfd_get_reloc_size (howto);
- buf = (bfd_byte *) bfd_zmalloc (size);
- if (buf == (bfd_byte *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- rstat = _bfd_relocate_contents (howto, output_bfd,
- link_order->u.reloc.p->addend, buf);
- switch (rstat)
- {
- case bfd_reloc_ok:
- break;
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
- if (! ((*info->callbacks->reloc_overflow)
- (info,
- (link_order->type == bfd_section_reloc_link_order
- ? bfd_section_name (output_bfd,
- link_order->u.reloc.p->u.section)
- : link_order->u.reloc.p->u.name),
- howto->name, link_order->u.reloc.p->addend,
- (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
- {
- free (buf);
- return false;
- }
- break;
- }
- ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
- (file_ptr) link_order->offset, size);
- free (buf);
- if (! ok)
- return false;
- }
+ if (flags & BSF_NOT_AT_END)
+ strcat (buffer, " not-at-end");
- /* Figure out the symbol index. */
- rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
- + output_section->reloc_count);
- if (link_order->type == bfd_section_reloc_link_order)
- {
- indx = link_order->u.reloc.p->u.section->target_index;
- BFD_ASSERT (indx != 0);
- *rel_hash_ptr = NULL;
- }
- else
- {
- struct elf_link_hash_entry *h;
+ if (flags & BSF_CONSTRUCTOR)
+ strcat (buffer, " constructor");
- h = elf_link_hash_lookup (elf_hash_table (info),
- link_order->u.reloc.p->u.name,
- false, false, true);
- if (h != NULL)
- {
- /* Setting the index to -2 tells elf_link_output_extsym that
- this symbol is used by a reloc. */
- h->indx = -2;
- *rel_hash_ptr = h;
- indx = 0;
- }
- else
- {
- if (! ((*info->callbacks->unattached_reloc)
- (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
- (asection *) NULL, (bfd_vma) 0)))
- return false;
- indx = 0;
- }
- }
+ if (flags & BSF_WARNING)
+ strcat (buffer, " warning");
- /* The address of a reloc is relative to the section in a
- relocateable file, and is a virtual address in an executable
- file. */
- offset = link_order->offset;
- if (! info->relocateable)
- offset += output_section->vma;
+ if (flags & BSF_INDIRECT)
+ strcat (buffer, " indirect");
- rel_hdr = &elf_section_data (output_section)->rel_hdr;
+ if (flags & BSF_FILE)
+ strcat (buffer, " file");
- if (rel_hdr->sh_type == SHT_REL)
- {
- Elf_Internal_Rel irel;
- Elf_External_Rel *erel;
-
- irel.r_offset = offset;
- irel.r_info = ELF_R_INFO (indx, howto->type);
- erel = ((Elf_External_Rel *) rel_hdr->contents
- + output_section->reloc_count);
- elf_swap_reloc_out (output_bfd, &irel, erel);
- }
- else
- {
- Elf_Internal_Rela irela;
- Elf_External_Rela *erela;
-
- irela.r_offset = offset;
- irela.r_info = ELF_R_INFO (indx, howto->type);
- irela.r_addend = link_order->u.reloc.p->addend;
- erela = ((Elf_External_Rela *) rel_hdr->contents
- + output_section->reloc_count);
- elf_swap_reloca_out (output_bfd, &irela, erela);
- }
+ if (flags & DYNAMIC)
+ strcat (buffer, " dynamic");
- ++output_section->reloc_count;
+ if (flags & ~(BSF_LOCAL
+ | BSF_GLOBAL
+ | BSF_DEBUGGING
+ | BSF_FUNCTION
+ | BSF_KEEP
+ | BSF_KEEP_G
+ | BSF_WEAK
+ | BSF_SECTION_SYM
+ | BSF_OLD_COMMON
+ | BSF_NOT_AT_END
+ | BSF_CONSTRUCTOR
+ | BSF_WARNING
+ | BSF_INDIRECT
+ | BSF_FILE
+ | BSF_DYNAMIC))
+ strcat (buffer, " unknown-bits");
- return true;
+ return buffer;
}
+#endif
+\f
+#include "elfcore.h"
+#include "elflink.h"
+\f
+/* Size-dependent data and functions. */
+const struct elf_size_info NAME(_bfd_elf,size_info) = {
+ sizeof (Elf_External_Ehdr),
+ sizeof (Elf_External_Phdr),
+ sizeof (Elf_External_Shdr),
+ sizeof (Elf_External_Rel),
+ sizeof (Elf_External_Rela),
+ sizeof (Elf_External_Sym),
+ sizeof (Elf_External_Dyn),
+ sizeof (Elf_External_Note),
+
+ ARCH_SIZE, FILE_ALIGN,
+ ELFCLASS, EV_CURRENT,
+ &write_out_phdrs,
+ &write_shdrs_and_ehdr,
+ &write_relocs,
+ &elf_swap_symbol_out,
+ &elf_slurp_reloc_table,
+ &elf_slurp_symbol_table,
+};
--- /dev/null
+/* Core file support */
+
+#ifdef HAVE_PROCFS /* Some core file support requires host /proc files */
+#include <sys/procfs.h>
+#else
+#define bfd_prstatus(abfd, descdata, descsz, filepos) true
+#define bfd_fpregset(abfd, descdata, descsz, filepos) true
+#define bfd_prpsinfo(abfd, descdata, descsz, filepos) true
+#endif
+
+#ifdef HAVE_PROCFS
+
+static boolean
+bfd_prstatus (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
+{
+ asection *newsect;
+ prstatus_t *status = (prstatus_t *) 0;
+
+ if (descsz == sizeof (prstatus_t))
+ {
+ newsect = bfd_make_section (abfd, ".reg");
+ if (newsect == NULL)
+ return false;
+ newsect->_raw_size = sizeof (status->pr_reg);
+ newsect->filepos = filepos + (long) &status->pr_reg;
+ newsect->flags = SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+ if ((core_prstatus (abfd) = bfd_alloc (abfd, descsz)) != NULL)
+ {
+ memcpy (core_prstatus (abfd), descdata, descsz);
+ }
+ }
+ return true;
+}
+
+/* Stash a copy of the prpsinfo structure away for future use. */
+
+static boolean
+bfd_prpsinfo (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
+{
+ if (descsz == sizeof (prpsinfo_t))
+ {
+ if ((core_prpsinfo (abfd) = bfd_alloc (abfd, descsz)) == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memcpy (core_prpsinfo (abfd), descdata, descsz);
+ }
+ return true;
+}
+
+static boolean
+bfd_fpregset (abfd, descdata, descsz, filepos)
+ bfd *abfd;
+ char *descdata;
+ int descsz;
+ long filepos;
+{
+ asection *newsect;
+
+ newsect = bfd_make_section (abfd, ".reg2");
+ if (newsect == NULL)
+ return false;
+ newsect->_raw_size = descsz;
+ newsect->filepos = filepos;
+ newsect->flags = SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+ return true;
+}
+
+#endif /* HAVE_PROCFS */
+
+/* Return a pointer to the args (including the command name) that were
+ seen by the program that generated the core dump. Note that for
+ some reason, a spurious space is tacked onto the end of the args
+ in some (at least one anyway) implementations, so strip it off if
+ it exists. */
+
+char *
+elf_core_file_failing_command (abfd)
+ bfd *abfd;
+{
+#ifdef HAVE_PROCFS
+ if (core_prpsinfo (abfd))
+ {
+ prpsinfo_t *p = core_prpsinfo (abfd);
+ char *scan = p->pr_psargs;
+ while (*scan++)
+ {;
+ }
+ scan -= 2;
+ if ((scan > p->pr_psargs) && (*scan == ' '))
+ {
+ *scan = '\000';
+ }
+ return p->pr_psargs;
+ }
+#endif
+ return NULL;
+}
+
+/* Return the number of the signal that caused the core dump. Presumably,
+ since we have a core file, we got a signal of some kind, so don't bother
+ checking the other process status fields, just return the signal number.
+ */
+
+int
+elf_core_file_failing_signal (abfd)
+ bfd *abfd;
+{
+#ifdef HAVE_PROCFS
+ if (core_prstatus (abfd))
+ {
+ return ((prstatus_t *) (core_prstatus (abfd)))->pr_cursig;
+ }
+#endif
+ return -1;
+}
+
+/* Check to see if the core file could reasonably be expected to have
+ come for the current executable file. Note that by default we return
+ true unless we find something that indicates that there might be a
+ problem.
+ */
+
+boolean
+elf_core_file_matches_executable_p (core_bfd, exec_bfd)
+ bfd *core_bfd;
+ bfd *exec_bfd;
+{
+#ifdef HAVE_PROCFS
+ char *corename;
+ char *execname;
+#endif
+
+ /* First, xvecs must match since both are ELF files for the same target. */
+
+ if (core_bfd->xvec != exec_bfd->xvec)
+ {
+ bfd_set_error (bfd_error_system_call);
+ return false;
+ }
+
+#ifdef HAVE_PROCFS
+
+ /* If no prpsinfo, just return true. Otherwise, grab the last component
+ of the exec'd pathname from the prpsinfo. */
+
+ if (core_prpsinfo (core_bfd))
+ {
+ corename = (((prpsinfo_t *) core_prpsinfo (core_bfd))->pr_fname);
+ }
+ else
+ {
+ return true;
+ }
+
+ /* Find the last component of the executable pathname. */
+
+ if ((execname = strrchr (exec_bfd->filename, '/')) != NULL)
+ {
+ execname++;
+ }
+ else
+ {
+ execname = (char *) exec_bfd->filename;
+ }
+
+ /* See if they match */
+
+ return strcmp (execname, corename) ? false : true;
+
+#else
+
+ return true;
+
+#endif /* HAVE_PROCFS */
+}
+
+/* ELF core files contain a segment of type PT_NOTE, that holds much of
+ the information that would normally be available from the /proc interface
+ for the process, at the time the process dumped core. Currently this
+ includes copies of the prstatus, prpsinfo, and fpregset structures.
+
+ Since these structures are potentially machine dependent in size and
+ ordering, bfd provides two levels of support for them. The first level,
+ available on all machines since it does not require that the host
+ have /proc support or the relevant include files, is to create a bfd
+ section for each of the prstatus, prpsinfo, and fpregset structures,
+ without any interpretation of their contents. With just this support,
+ the bfd client will have to interpret the structures itself. Even with
+ /proc support, it might want these full structures for it's own reasons.
+
+ In the second level of support, where HAVE_PROCFS is defined, bfd will
+ pick apart the structures to gather some additional information that
+ clients may want, such as the general register set, the name of the
+ exec'ed file and its arguments, the signal (if any) that caused the
+ core dump, etc.
+
+ */
+
+static boolean
+elf_corefile_note (abfd, hdr)
+ bfd *abfd;
+ Elf_Internal_Phdr *hdr;
+{
+ Elf_External_Note *x_note_p; /* Elf note, external form */
+ Elf_Internal_Note i_note; /* Elf note, internal form */
+ char *buf = NULL; /* Entire note segment contents */
+ char *namedata; /* Name portion of the note */
+ char *descdata; /* Descriptor portion of the note */
+ char *sectname; /* Name to use for new section */
+ long filepos; /* File offset to descriptor data */
+ asection *newsect;
+
+ if (hdr->p_filesz > 0
+ && (buf = (char *) malloc (hdr->p_filesz)) != NULL
+ && bfd_seek (abfd, hdr->p_offset, SEEK_SET) != -1
+ && bfd_read ((PTR) buf, hdr->p_filesz, 1, abfd) == hdr->p_filesz)
+ {
+ x_note_p = (Elf_External_Note *) buf;
+ while ((char *) x_note_p < (buf + hdr->p_filesz))
+ {
+ i_note.namesz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->namesz);
+ i_note.descsz = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->descsz);
+ i_note.type = bfd_h_get_32 (abfd, (bfd_byte *) x_note_p->type);
+ namedata = x_note_p->name;
+ descdata = namedata + BFD_ALIGN (i_note.namesz, 4);
+ filepos = hdr->p_offset + (descdata - buf);
+ switch (i_note.type)
+ {
+ case NT_PRSTATUS:
+ /* process descdata as prstatus info */
+ if (! bfd_prstatus (abfd, descdata, i_note.descsz, filepos))
+ return false;
+ sectname = ".prstatus";
+ break;
+ case NT_FPREGSET:
+ /* process descdata as fpregset info */
+ if (! bfd_fpregset (abfd, descdata, i_note.descsz, filepos))
+ return false;
+ sectname = ".fpregset";
+ break;
+ case NT_PRPSINFO:
+ /* process descdata as prpsinfo */
+ if (! bfd_prpsinfo (abfd, descdata, i_note.descsz, filepos))
+ return false;
+ sectname = ".prpsinfo";
+ break;
+ default:
+ /* Unknown descriptor, just ignore it. */
+ sectname = NULL;
+ break;
+ }
+ if (sectname != NULL)
+ {
+ newsect = bfd_make_section (abfd, sectname);
+ if (newsect == NULL)
+ return false;
+ newsect->_raw_size = i_note.descsz;
+ newsect->filepos = filepos;
+ newsect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
+ newsect->alignment_power = 2;
+ }
+ x_note_p = (Elf_External_Note *)
+ (descdata + BFD_ALIGN (i_note.descsz, 4));
+ }
+ }
+ if (buf != NULL)
+ {
+ free (buf);
+ }
+ else if (hdr->p_filesz > 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ return true;
+
+}
+
+/* Core files are simply standard ELF formatted files that partition
+ the file using the execution view of the file (program header table)
+ rather than the linking view. In fact, there is no section header
+ table in a core file.
+
+ The process status information (including the contents of the general
+ register set) and the floating point register set are stored in a
+ segment of type PT_NOTE. We handcraft a couple of extra bfd sections
+ that allow standard bfd access to the general registers (.reg) and the
+ floating point registers (.reg2).
+
+ */
+
+const bfd_target *
+elf_core_file_p (abfd)
+ bfd *abfd;
+{
+ Elf_External_Ehdr x_ehdr; /* Elf file header, external form */
+ Elf_Internal_Ehdr *i_ehdrp; /* Elf file header, internal form */
+ Elf_External_Phdr x_phdr; /* Program header table entry, external form */
+ Elf_Internal_Phdr *i_phdrp; /* Program header table, internal form */
+ unsigned int phindex;
+ struct elf_backend_data *ebd;
+
+ /* Read in the ELF header in external format. */
+
+ if (bfd_read ((PTR) & x_ehdr, sizeof (x_ehdr), 1, abfd) != sizeof (x_ehdr))
+ {
+ if (bfd_get_error () != bfd_error_system_call)
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* Now check to see if we have a valid ELF file, and one that BFD can
+ make use of. The magic number must match, the address size ('class')
+ and byte-swapping must match our XVEC entry, and it must have a
+ program header table (FIXME: See comments re segments at top of this
+ file). */
+
+ if (elf_file_p (&x_ehdr) == false)
+ {
+ wrong:
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
+
+ /* FIXME, Check EI_VERSION here ! */
+
+ {
+#if ARCH_SIZE == 32
+ int desired_address_size = ELFCLASS32;
+#endif
+#if ARCH_SIZE == 64
+ int desired_address_size = ELFCLASS64;
+#endif
+
+ if (x_ehdr.e_ident[EI_CLASS] != desired_address_size)
+ goto wrong;
+ }
+
+ /* Switch xvec to match the specified byte order. */
+ switch (x_ehdr.e_ident[EI_DATA])
+ {
+ case ELFDATA2MSB: /* Big-endian */
+ if (abfd->xvec->byteorder_big_p == false)
+ goto wrong;
+ break;
+ case ELFDATA2LSB: /* Little-endian */
+ if (abfd->xvec->byteorder_big_p == true)
+ goto wrong;
+ break;
+ case ELFDATANONE: /* No data encoding specified */
+ default: /* Unknown data encoding specified */
+ goto wrong;
+ }
+
+ /* Allocate an instance of the elf_obj_tdata structure and hook it up to
+ the tdata pointer in the bfd. */
+
+ elf_tdata (abfd) =
+ (struct elf_obj_tdata *) bfd_zalloc (abfd, sizeof (struct elf_obj_tdata));
+ if (elf_tdata (abfd) == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ /* FIXME, `wrong' returns from this point onward, leak memory. */
+
+ /* Now that we know the byte order, swap in the rest of the header */
+ i_ehdrp = elf_elfheader (abfd);
+ elf_swap_ehdr_in (abfd, &x_ehdr, i_ehdrp);
+#if DEBUG & 1
+ elf_debug_file (i_ehdrp);
+#endif
+
+ ebd = get_elf_backend_data (abfd);
+
+ /* Check that the ELF e_machine field matches what this particular
+ BFD format expects. */
+ if (ebd->elf_machine_code != i_ehdrp->e_machine
+ && (ebd->elf_machine_alt1 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt1)
+ && (ebd->elf_machine_alt2 == 0 || i_ehdrp->e_machine != ebd->elf_machine_alt2))
+ {
+ const bfd_target * const *target_ptr;
+
+ if (ebd->elf_machine_code != EM_NONE)
+ goto wrong;
+
+ /* This is the generic ELF target. Let it match any ELF target
+ for which we do not have a specific backend. */
+ for (target_ptr = bfd_target_vector; *target_ptr != NULL; target_ptr++)
+ {
+ struct elf_backend_data *back;
+
+ if ((*target_ptr)->flavour != bfd_target_elf_flavour)
+ continue;
+ back = (struct elf_backend_data *) (*target_ptr)->backend_data;
+ if (back->elf_machine_code == i_ehdrp->e_machine)
+ {
+ /* target_ptr is an ELF backend which matches this
+ object file, so reject the generic ELF target. */
+ goto wrong;
+ }
+ }
+ }
+
+ /* If there is no program header, or the type is not a core file, then
+ we are hosed. */
+ if (i_ehdrp->e_phoff == 0 || i_ehdrp->e_type != ET_CORE)
+ goto wrong;
+
+ /* Allocate space for a copy of the program header table in
+ internal form, seek to the program header table in the file,
+ read it in, and convert it to internal form. As a simple sanity
+ check, verify that the what BFD thinks is the size of each program
+ header table entry actually matches the size recorded in the file. */
+
+ if (i_ehdrp->e_phentsize != sizeof (x_phdr))
+ goto wrong;
+ i_phdrp = (Elf_Internal_Phdr *)
+ bfd_alloc (abfd, sizeof (*i_phdrp) * i_ehdrp->e_phnum);
+ if (!i_phdrp)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ if (bfd_seek (abfd, i_ehdrp->e_phoff, SEEK_SET) == -1)
+ return NULL;
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+ {
+ if (bfd_read ((PTR) & x_phdr, sizeof (x_phdr), 1, abfd)
+ != sizeof (x_phdr))
+ return NULL;
+ elf_swap_phdr_in (abfd, &x_phdr, i_phdrp + phindex);
+ }
+
+ /* Once all of the program headers have been read and converted, we
+ can start processing them. */
+
+ for (phindex = 0; phindex < i_ehdrp->e_phnum; phindex++)
+ {
+ bfd_section_from_phdr (abfd, i_phdrp + phindex, phindex);
+ if ((i_phdrp + phindex)->p_type == PT_NOTE)
+ {
+ if (! elf_corefile_note (abfd, i_phdrp + phindex))
+ return NULL;
+ }
+ }
+
+ /* Remember the entry point specified in the ELF file header. */
+
+ bfd_get_start_address (abfd) = i_ehdrp->e_entry;
+
+ return abfd->xvec;
+}
--- /dev/null
+/* ELF linking support for BFD.
+ Copyright 1993, 1995 Free Software Foundation, Inc.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#define ARCH_SIZE 0
+#include "libelf.h"
+
+boolean
+_bfd_elf_create_got_section (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ flagword flags;
+ register asection *s;
+ struct elf_link_hash_entry *h;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* This function may be called more than once. */
+ if (bfd_get_section_by_name (abfd, ".got") != NULL)
+ return true;
+
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+
+ s = bfd_make_section (abfd, ".got");
+ if (s == NULL
+ || !bfd_set_section_flags (abfd, s, flags)
+ || !bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ if (bed->want_got_plt)
+ {
+ s = bfd_make_section (abfd, ".got.plt");
+ if (s == NULL
+ || !bfd_set_section_flags (abfd, s, flags)
+ || !bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ }
+
+ /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
+ (or .got.plt) section. We don't do this in the linker script
+ because we don't want to define the symbol if we are not creating
+ a global offset table. */
+ h = NULL;
+ if (!(_bfd_generic_link_add_one_symbol
+ (info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s, (bfd_vma) 0,
+ (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
+ (struct bfd_link_hash_entry **) &h)))
+ return false;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ if (info->shared
+ && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return false;
+
+ /* The first three global offset table entries are reserved. */
+ s->_raw_size += 3 * 4;
+
+ return true;
+}
+
+/* Create dynamic sections when linking against a dynamic object. */
+
+boolean
+_bfd_elf_create_dynamic_sections (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ flagword flags;
+ register asection *s;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+
+ /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
+ .rel[a].bss sections. */
+
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+
+ s = bfd_make_section (abfd, ".plt");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s,
+ (flags | SEC_CODE
+ | (bed->plt_readonly ? SEC_READONLY : 0)))
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ if (bed->want_plt_sym)
+ {
+ /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
+ .plt section. */
+ struct elf_link_hash_entry *h = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
+ (bfd_vma) 0, (const char *) NULL, false,
+ get_elf_backend_data (abfd)->collect,
+ (struct bfd_link_hash_entry **) &h)))
+ return false;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ if (info->shared
+ && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return false;
+ }
+
+ s = bfd_make_section (abfd, bed->use_rela_p ? ".rela.plt" : ".rel.plt");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+
+ if (! _bfd_elf_create_got_section (abfd, info))
+ return false;
+
+ /* The .dynbss section is a place to put symbols which are defined
+ by dynamic objects, are referenced by regular objects, and are
+ not functions. We must allocate space for them in the process
+ image and use a R_*_COPY reloc to tell the dynamic linker to
+ initialize them at run time. The linker script puts the .dynbss
+ section into the .bss section of the final image. */
+ s = bfd_make_section (abfd, ".dynbss");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
+ return false;
+
+ /* The .rel[a].bss section holds copy relocs. This section is not
+ normally needed. We need to create it here, though, so that the
+ linker will map it to an output section. We can't just create it
+ only if we need it, because we will not know whether we need it
+ until we have seen all the input files, and the first time the
+ main linker code calls BFD after examining all the input files
+ (size_dynamic_sections) the input sections have already been
+ mapped to the output sections. If the section turns out not to
+ be needed, we can discard it later. We will never need this
+ section when generating a shared object, since they do not use
+ copy relocs. */
+ if (! info->shared)
+ {
+ s = bfd_make_section (abfd, bed->use_rela_p ? ".rela.bss" : ".rel.bss");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, 2))
+ return false;
+ }
+
+ return true;
+}
+
+/* Record a new dynamic symbol. We record the dynamic symbols as we
+ read the input files, since we need to have a list of all of them
+ before we can determine the final sizes of the output sections.
+ Note that we may actually call this function even though we are not
+ going to output any dynamic symbols; in some cases we know that a
+ symbol should be in the dynamic symbol table, but only if there is
+ one. */
+
+boolean
+_bfd_elf_link_record_dynamic_symbol (info, h)
+ struct bfd_link_info *info;
+ struct elf_link_hash_entry *h;
+{
+ if (h->dynindx == -1)
+ {
+ struct bfd_strtab_hash *dynstr;
+
+ h->dynindx = elf_hash_table (info)->dynsymcount;
+ ++elf_hash_table (info)->dynsymcount;
+
+ dynstr = elf_hash_table (info)->dynstr;
+ if (dynstr == NULL)
+ {
+ /* Create a strtab to hold the dynamic symbol names. */
+ elf_hash_table (info)->dynstr = dynstr = _bfd_elf_stringtab_init ();
+ if (dynstr == NULL)
+ return false;
+ }
+
+ h->dynstr_index = ((unsigned long)
+ _bfd_stringtab_add (dynstr, h->root.root.string,
+ true, false));
+ if (h->dynstr_index == (unsigned long) -1)
+ return false;
+ }
+
+ return true;
+}
--- /dev/null
+/* ELF linker code. */
+
+static boolean elf_link_add_object_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean elf_link_add_archive_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static Elf_Internal_Rela *elf_link_read_relocs
+ PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
+static boolean elf_export_symbol
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean elf_adjust_dynamic_symbol
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+
+/* This struct is used to pass information to routines called via
+ elf_link_hash_traverse which must return failure. */
+
+struct elf_info_failed
+{
+ boolean failed;
+ struct bfd_link_info *info;
+};
+
+/* Given an ELF BFD, add symbols to the global hash table as
+ appropriate. */
+
+boolean
+elf_bfd_link_add_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd *first;
+
+ switch (bfd_get_format (abfd))
+ {
+ case bfd_object:
+ return elf_link_add_object_symbols (abfd, info);
+ case bfd_archive:
+ first = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
+ if (first == NULL)
+ {
+ /* It's OK to have an empty archive. */
+ return true;
+ }
+ if (! bfd_check_format (first, bfd_object))
+ return false;
+ if (bfd_get_flavour (first) != bfd_target_elf_flavour)
+ {
+ /* On Linux, we may have an a.out archive which got
+ recognized as an ELF archive. Therefore, we treat all
+ archives as though they were actually of the flavour of
+ their first element. */
+ return (*first->xvec->_bfd_link_add_symbols) (abfd, info);
+ }
+ return elf_link_add_archive_symbols (abfd, info);
+ default:
+ bfd_set_error (bfd_error_wrong_format);
+ return false;
+ }
+}
+
+/* Add symbols from an ELF archive file to the linker hash table. We
+ don't use _bfd_generic_link_add_archive_symbols because of a
+ problem which arises on UnixWare. The UnixWare libc.so is an
+ archive which includes an entry libc.so.1 which defines a bunch of
+ symbols. The libc.so archive also includes a number of other
+ object files, which also define symbols, some of which are the same
+ as those defined in libc.so.1. Correct linking requires that we
+ consider each object file in turn, and include it if it defines any
+ symbols we need. _bfd_generic_link_add_archive_symbols does not do
+ this; it looks through the list of undefined symbols, and includes
+ any object file which defines them. When this algorithm is used on
+ UnixWare, it winds up pulling in libc.so.1 early and defining a
+ bunch of symbols. This means that some of the other objects in the
+ archive are not included in the link, which is incorrect since they
+ precede libc.so.1 in the archive.
+
+ Fortunately, ELF archive handling is simpler than that done by
+ _bfd_generic_link_add_archive_symbols, which has to allow for a.out
+ oddities. In ELF, if we find a symbol in the archive map, and the
+ symbol is currently undefined, we know that we must pull in that
+ object file.
+
+ Unfortunately, we do have to make multiple passes over the symbol
+ table until nothing further is resolved. */
+
+static boolean
+elf_link_add_archive_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ symindex c;
+ boolean *defined = NULL;
+ boolean *included = NULL;
+ carsym *symdefs;
+ boolean loop;
+
+ if (! bfd_has_map (abfd))
+ {
+ /* An empty archive is a special case. */
+ if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL)
+ return true;
+ bfd_set_error (bfd_error_no_armap);
+ return false;
+ }
+
+ /* Keep track of all symbols we know to be already defined, and all
+ files we know to be already included. This is to speed up the
+ second and subsequent passes. */
+ c = bfd_ardata (abfd)->symdef_count;
+ if (c == 0)
+ return true;
+ defined = (boolean *) malloc (c * sizeof (boolean));
+ included = (boolean *) malloc (c * sizeof (boolean));
+ if (defined == (boolean *) NULL || included == (boolean *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ memset (defined, 0, c * sizeof (boolean));
+ memset (included, 0, c * sizeof (boolean));
+
+ symdefs = bfd_ardata (abfd)->symdefs;
+
+ do
+ {
+ file_ptr last;
+ symindex i;
+ carsym *symdef;
+ carsym *symdefend;
+
+ loop = false;
+ last = -1;
+
+ symdef = symdefs;
+ symdefend = symdef + c;
+ for (i = 0; symdef < symdefend; symdef++, i++)
+ {
+ struct elf_link_hash_entry *h;
+ bfd *element;
+ struct bfd_link_hash_entry *undefs_tail;
+ symindex mark;
+
+ if (defined[i] || included[i])
+ continue;
+ if (symdef->file_offset == last)
+ {
+ included[i] = true;
+ continue;
+ }
+
+ h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
+ false, false, false);
+ if (h == (struct elf_link_hash_entry *) NULL)
+ continue;
+ if (h->root.type != bfd_link_hash_undefined)
+ {
+ defined[i] = true;
+ continue;
+ }
+
+ /* We need to include this archive member. */
+
+ element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
+ if (element == (bfd *) NULL)
+ goto error_return;
+
+ if (! bfd_check_format (element, bfd_object))
+ goto error_return;
+
+ /* Doublecheck that we have not included this object
+ already--it should be impossible, but there may be
+ something wrong with the archive. */
+ if (element->archive_pass != 0)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ element->archive_pass = 1;
+
+ undefs_tail = info->hash->undefs_tail;
+
+ if (! (*info->callbacks->add_archive_element) (info, element,
+ symdef->name))
+ goto error_return;
+ if (! elf_link_add_object_symbols (element, info))
+ goto error_return;
+
+ /* If there are any new undefined symbols, we need to make
+ another pass through the archive in order to see whether
+ they can be defined. FIXME: This isn't perfect, because
+ common symbols wind up on undefs_tail and because an
+ undefined symbol which is defined later on in this pass
+ does not require another pass. This isn't a bug, but it
+ does make the code less efficient than it could be. */
+ if (undefs_tail != info->hash->undefs_tail)
+ loop = true;
+
+ /* Look backward to mark all symbols from this object file
+ which we have already seen in this pass. */
+ mark = i;
+ do
+ {
+ included[mark] = true;
+ if (mark == 0)
+ break;
+ --mark;
+ }
+ while (symdefs[mark].file_offset == symdef->file_offset);
+
+ /* We mark subsequent symbols from this object file as we go
+ on through the loop. */
+ last = symdef->file_offset;
+ }
+ }
+ while (loop);
+
+ free (defined);
+ free (included);
+
+ return true;
+
+ error_return:
+ if (defined != (boolean *) NULL)
+ free (defined);
+ if (included != (boolean *) NULL)
+ free (included);
+ return false;
+}
+
+/* Add symbols from an ELF object file to the linker hash table. */
+
+static boolean
+elf_link_add_object_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
+ const Elf_Internal_Sym *,
+ const char **, flagword *,
+ asection **, bfd_vma *));
+ boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *,
+ asection *, const Elf_Internal_Rela *));
+ boolean collect;
+ Elf_Internal_Shdr *hdr;
+ size_t symcount;
+ size_t extsymcount;
+ size_t extsymoff;
+ Elf_External_Sym *buf = NULL;
+ struct elf_link_hash_entry **sym_hash;
+ boolean dynamic;
+ Elf_External_Dyn *dynbuf = NULL;
+ struct elf_link_hash_entry *weaks;
+ Elf_External_Sym *esym;
+ Elf_External_Sym *esymend;
+
+ add_symbol_hook = get_elf_backend_data (abfd)->elf_add_symbol_hook;
+ collect = get_elf_backend_data (abfd)->collect;
+
+ /* A stripped shared library might only have a dynamic symbol table,
+ not a regular symbol table. In that case we can still go ahead
+ and link using the dynamic symbol table. */
+ if (elf_onesymtab (abfd) == 0
+ && elf_dynsymtab (abfd) != 0)
+ {
+ elf_onesymtab (abfd) = elf_dynsymtab (abfd);
+ elf_tdata (abfd)->symtab_hdr = elf_tdata (abfd)->dynsymtab_hdr;
+ }
+
+ hdr = &elf_tdata (abfd)->symtab_hdr;
+ symcount = hdr->sh_size / sizeof (Elf_External_Sym);
+
+ /* The sh_info field of the symtab header tells us where the
+ external symbols start. We don't care about the local symbols at
+ this point. */
+ if (elf_bad_symtab (abfd))
+ {
+ extsymcount = symcount;
+ extsymoff = 0;
+ }
+ else
+ {
+ extsymcount = symcount - hdr->sh_info;
+ extsymoff = hdr->sh_info;
+ }
+
+ buf = (Elf_External_Sym *) malloc (extsymcount * sizeof (Elf_External_Sym));
+ if (buf == NULL && extsymcount != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* We store a pointer to the hash table entry for each external
+ symbol. */
+ sym_hash = ((struct elf_link_hash_entry **)
+ bfd_alloc (abfd,
+ extsymcount * sizeof (struct elf_link_hash_entry *)));
+ if (sym_hash == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ elf_sym_hashes (abfd) = sym_hash;
+
+ if (elf_elfheader (abfd)->e_type != ET_DYN)
+ {
+ dynamic = false;
+
+ /* If we are creating a shared library, create all the dynamic
+ sections immediately. We need to attach them to something,
+ so we attach them to this BFD, provided it is the right
+ format. FIXME: If there are no input BFD's of the same
+ format as the output, we can't make a shared library. */
+ if (info->shared
+ && ! elf_hash_table (info)->dynamic_sections_created
+ && abfd->xvec == info->hash->creator)
+ {
+ if (! elf_link_create_dynamic_sections (abfd, info))
+ goto error_return;
+ }
+ }
+ else
+ {
+ asection *s;
+ boolean add_needed;
+ const char *name;
+ bfd_size_type oldsize;
+ bfd_size_type strindex;
+
+ dynamic = true;
+
+ /* You can't use -r against a dynamic object. Also, there's no
+ hope of using a dynamic object which does not exactly match
+ the format of the output file. */
+ if (info->relocateable
+ || info->hash->creator != abfd->xvec)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ goto error_return;
+ }
+
+ /* Find the name to use in a DT_NEEDED entry that refers to this
+ object. If the object has a DT_SONAME entry, we use it.
+ Otherwise, if the generic linker stuck something in
+ elf_dt_needed_name, we use that. Otherwise, we just use the
+ file name. If the generic linker put a null string into
+ elf_dt_needed_name, we don't make a DT_NEEDED entry at all,
+ even if there is a DT_SONAME entry. */
+ add_needed = true;
+ name = bfd_get_filename (abfd);
+ if (elf_dt_needed_name (abfd) != NULL)
+ {
+ name = elf_dt_needed_name (abfd);
+ if (*name == '\0')
+ add_needed = false;
+ }
+ s = bfd_get_section_by_name (abfd, ".dynamic");
+ if (s != NULL)
+ {
+ Elf_External_Dyn *extdyn;
+ Elf_External_Dyn *extdynend;
+ int elfsec;
+ unsigned long link;
+
+ dynbuf = (Elf_External_Dyn *) malloc (s->_raw_size);
+ if (dynbuf == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
+ (file_ptr) 0, s->_raw_size))
+ goto error_return;
+
+ elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
+ if (elfsec == -1)
+ goto error_return;
+ link = elf_elfsections (abfd)[elfsec]->sh_link;
+
+ extdyn = dynbuf;
+ extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
+ for (; extdyn < extdynend; extdyn++)
+ {
+ Elf_Internal_Dyn dyn;
+
+ elf_swap_dyn_in (abfd, extdyn, &dyn);
+ if (add_needed && dyn.d_tag == DT_SONAME)
+ {
+ name = bfd_elf_string_from_elf_section (abfd, link,
+ dyn.d_un.d_val);
+ if (name == NULL)
+ goto error_return;
+ }
+ if (dyn.d_tag == DT_NEEDED)
+ {
+ struct bfd_elf_link_needed_list *n, **pn;
+ char *fnm, *anm;
+
+ n = bfd_alloc (abfd,
+ sizeof (struct bfd_elf_link_needed_list));
+ fnm = bfd_elf_string_from_elf_section (abfd, link,
+ dyn.d_un.d_val);
+ if (n == NULL || fnm == NULL)
+ goto error_return;
+ anm = bfd_alloc (abfd, strlen (fnm) + 1);
+ if (anm == NULL)
+ goto error_return;
+ strcpy (anm, fnm);
+ n->name = anm;
+ n->by = abfd;
+ n->next = NULL;
+ for (pn = &elf_hash_table (info)->needed;
+ *pn != NULL;
+ pn = &(*pn)->next)
+ ;
+ *pn = n;
+ }
+ }
+
+ free (dynbuf);
+ dynbuf = NULL;
+ }
+
+ /* We do not want to include any of the sections in a dynamic
+ object in the output file. We hack by simply clobbering the
+ list of sections in the BFD. This could be handled more
+ cleanly by, say, a new section flag; the existing
+ SEC_NEVER_LOAD flag is not the one we want, because that one
+ still implies that the section takes up space in the output
+ file. */
+ abfd->sections = NULL;
+
+ /* If this is the first dynamic object found in the link, create
+ the special sections required for dynamic linking. */
+ if (! elf_hash_table (info)->dynamic_sections_created)
+ {
+ if (! elf_link_create_dynamic_sections (abfd, info))
+ goto error_return;
+ }
+
+ if (add_needed)
+ {
+ /* Add a DT_NEEDED entry for this dynamic object. */
+ oldsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
+ strindex = _bfd_stringtab_add (elf_hash_table (info)->dynstr, name,
+ true, false);
+ if (strindex == (bfd_size_type) -1)
+ goto error_return;
+
+ if (oldsize == _bfd_stringtab_size (elf_hash_table (info)->dynstr))
+ {
+ asection *sdyn;
+ Elf_External_Dyn *dyncon, *dynconend;
+
+ /* The hash table size did not change, which means that
+ the dynamic object name was already entered. If we
+ have already included this dynamic object in the
+ link, just ignore it. There is no reason to include
+ a particular dynamic object more than once. */
+ sdyn = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
+ ".dynamic");
+ BFD_ASSERT (sdyn != NULL);
+
+ dyncon = (Elf_External_Dyn *) sdyn->contents;
+ dynconend = (Elf_External_Dyn *) (sdyn->contents +
+ sdyn->_raw_size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+
+ elf_swap_dyn_in (elf_hash_table (info)->dynobj, dyncon,
+ &dyn);
+ if (dyn.d_tag == DT_NEEDED
+ && dyn.d_un.d_val == strindex)
+ {
+ if (buf != NULL)
+ free (buf);
+ return true;
+ }
+ }
+ }
+
+ if (! elf_add_dynamic_entry (info, DT_NEEDED, strindex))
+ goto error_return;
+ }
+ }
+
+ if (bfd_seek (abfd,
+ hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym),
+ SEEK_SET) != 0
+ || (bfd_read ((PTR) buf, sizeof (Elf_External_Sym), extsymcount, abfd)
+ != extsymcount * sizeof (Elf_External_Sym)))
+ goto error_return;
+
+ weaks = NULL;
+
+ esymend = buf + extsymcount;
+ for (esym = buf; esym < esymend; esym++, sym_hash++)
+ {
+ Elf_Internal_Sym sym;
+ int bind;
+ bfd_vma value;
+ asection *sec;
+ flagword flags;
+ const char *name;
+ struct elf_link_hash_entry *h = NULL;
+ boolean definition;
+
+ elf_swap_symbol_in (abfd, esym, &sym);
+
+ flags = BSF_NO_FLAGS;
+ sec = NULL;
+ value = sym.st_value;
+ *sym_hash = NULL;
+
+ bind = ELF_ST_BIND (sym.st_info);
+ if (bind == STB_LOCAL)
+ {
+ /* This should be impossible, since ELF requires that all
+ global symbols follow all local symbols, and that sh_info
+ point to the first global symbol. Unfortunatealy, Irix 5
+ screws this up. */
+ continue;
+ }
+ else if (bind == STB_GLOBAL)
+ {
+ if (sym.st_shndx != SHN_UNDEF
+ && sym.st_shndx != SHN_COMMON)
+ flags = BSF_GLOBAL;
+ else
+ flags = 0;
+ }
+ else if (bind == STB_WEAK)
+ flags = BSF_WEAK;
+ else
+ {
+ /* Leave it up to the processor backend. */
+ }
+
+ if (sym.st_shndx == SHN_UNDEF)
+ sec = bfd_und_section_ptr;
+ else if (sym.st_shndx > 0 && sym.st_shndx < SHN_LORESERVE)
+ {
+ sec = section_from_elf_index (abfd, sym.st_shndx);
+ if (sec != NULL)
+ value -= sec->vma;
+ else
+ sec = bfd_abs_section_ptr;
+ }
+ else if (sym.st_shndx == SHN_ABS)
+ sec = bfd_abs_section_ptr;
+ else if (sym.st_shndx == SHN_COMMON)
+ {
+ sec = bfd_com_section_ptr;
+ /* What ELF calls the size we call the value. What ELF
+ calls the value we call the alignment. */
+ value = sym.st_size;
+ }
+ else
+ {
+ /* Leave it up to the processor backend. */
+ }
+
+ name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
+ if (name == (const char *) NULL)
+ goto error_return;
+
+ if (add_symbol_hook)
+ {
+ if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
+ &value))
+ goto error_return;
+
+ /* The hook function sets the name to NULL if this symbol
+ should be skipped for some reason. */
+ if (name == (const char *) NULL)
+ continue;
+ }
+
+ /* Sanity check that all possibilities were handled. */
+ if (sec == (asection *) NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ if (bfd_is_und_section (sec)
+ || bfd_is_com_section (sec))
+ definition = false;
+ else
+ definition = true;
+
+ if (info->hash->creator->flavour == bfd_target_elf_flavour)
+ {
+ /* We need to look up the symbol now in order to get some of
+ the dynamic object handling right. We pass the hash
+ table entry in to _bfd_generic_link_add_one_symbol so
+ that it does not have to look it up again. */
+ h = elf_link_hash_lookup (elf_hash_table (info), name,
+ true, false, false);
+ if (h == NULL)
+ goto error_return;
+ *sym_hash = h;
+
+ /* If we are looking at a dynamic object, and this is a
+ definition, we need to see if it has already been defined
+ by some other object. If it has, we want to use the
+ existing definition, and we do not want to report a
+ multiple symbol definition error; we do this by
+ clobbering sec to be bfd_und_section_ptr. */
+ if (dynamic && definition)
+ {
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ sec = bfd_und_section_ptr;
+ }
+
+ /* Similarly, if we are not looking at a dynamic object, and
+ we have a definition, we want to override any definition
+ we may have from a dynamic object. Symbols from regular
+ files always take precedence over symbols from dynamic
+ objects, even if they are defined after the dynamic
+ object in the link. */
+ if (! dynamic
+ && definition
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (bfd_get_flavour (h->root.u.def.section->owner)
+ == bfd_target_elf_flavour)
+ && (elf_elfheader (h->root.u.def.section->owner)->e_type
+ == ET_DYN))
+ {
+ /* Change the hash table entry to undefined, and let
+ _bfd_generic_link_add_one_symbol do the right thing
+ with the new definition. */
+ h->root.type = bfd_link_hash_undefined;
+ h->root.u.undef.abfd = h->root.u.def.section->owner;
+ }
+ }
+
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, name, flags, sec, value, (const char *) NULL,
+ false, collect, (struct bfd_link_hash_entry **) sym_hash)))
+ goto error_return;
+
+ if (dynamic
+ && definition
+ && (flags & BSF_WEAK) != 0
+ && ELF_ST_TYPE (sym.st_info) != STT_FUNC
+ && info->hash->creator->flavour == bfd_target_elf_flavour
+ && (*sym_hash)->weakdef == NULL)
+ {
+ /* Keep a list of all weak defined non function symbols from
+ a dynamic object, using the weakdef field. Later in this
+ function we will set the weakdef field to the correct
+ value. We only put non-function symbols from dynamic
+ objects on this list, because that happens to be the only
+ time we need to know the normal symbol corresponding to a
+ weak symbol, and the information is time consuming to
+ figure out. If the weakdef field is not already NULL,
+ then this symbol was already defined by some previous
+ dynamic object, and we will be using that previous
+ definition anyhow. */
+
+ (*sym_hash)->weakdef = weaks;
+ weaks = *sym_hash;
+ }
+
+ /* Get the alignment of a common symbol. */
+ if (sym.st_shndx == SHN_COMMON
+ && (*sym_hash)->root.type == bfd_link_hash_common)
+ (*sym_hash)->root.u.c.p->alignment_power = bfd_log2 (sym.st_value);
+
+ if (info->hash->creator->flavour == bfd_target_elf_flavour)
+ {
+ int old_flags;
+ boolean dynsym;
+ int new_flag;
+
+ /* Remember the symbol size and type. */
+ if (sym.st_size != 0)
+ {
+ /* FIXME: We should probably somehow give a warning if
+ the symbol size changes. */
+ h->size = sym.st_size;
+ }
+ if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE)
+ {
+ /* FIXME: We should probably somehow give a warning if
+ the symbol type changes. */
+ h->type = ELF_ST_TYPE (sym.st_info);
+ }
+
+ /* Set a flag in the hash table entry indicating the type of
+ reference or definition we just found. Keep a count of
+ the number of dynamic symbols we find. A dynamic symbol
+ is one which is referenced or defined by both a regular
+ object and a shared object, or one which is referenced or
+ defined by more than one shared object. */
+ old_flags = h->elf_link_hash_flags;
+ dynsym = false;
+ if (! dynamic)
+ {
+ if (! definition)
+ new_flag = ELF_LINK_HASH_REF_REGULAR;
+ else
+ new_flag = ELF_LINK_HASH_DEF_REGULAR;
+ if (info->shared
+ || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
+ | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
+ dynsym = true;
+ }
+ else
+ {
+ if (! definition)
+ new_flag = ELF_LINK_HASH_REF_DYNAMIC;
+ else
+ new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
+ if ((old_flags & new_flag) != 0
+ || (old_flags & (ELF_LINK_HASH_DEF_REGULAR
+ | ELF_LINK_HASH_REF_REGULAR)) != 0)
+ dynsym = true;
+ }
+
+ h->elf_link_hash_flags |= new_flag;
+ if (dynsym && h->dynindx == -1)
+ {
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ goto error_return;
+ }
+ }
+ }
+
+ /* Now set the weakdefs field correctly for all the weak defined
+ symbols we found. The only way to do this is to search all the
+ symbols. Since we only need the information for non functions in
+ dynamic objects, that's the only time we actually put anything on
+ the list WEAKS. We need this information so that if a regular
+ object refers to a symbol defined weakly in a dynamic object, the
+ real symbol in the dynamic object is also put in the dynamic
+ symbols; we also must arrange for both symbols to point to the
+ same memory location. We could handle the general case of symbol
+ aliasing, but a general symbol alias can only be generated in
+ assembler code, handling it correctly would be very time
+ consuming, and other ELF linkers don't handle general aliasing
+ either. */
+ while (weaks != NULL)
+ {
+ struct elf_link_hash_entry *hlook;
+ asection *slook;
+ bfd_vma vlook;
+ struct elf_link_hash_entry **hpp;
+ struct elf_link_hash_entry **hppend;
+
+ hlook = weaks;
+ weaks = hlook->weakdef;
+ hlook->weakdef = NULL;
+
+ BFD_ASSERT (hlook->root.type == bfd_link_hash_defined
+ || hlook->root.type == bfd_link_hash_defweak
+ || hlook->root.type == bfd_link_hash_common
+ || hlook->root.type == bfd_link_hash_indirect);
+ slook = hlook->root.u.def.section;
+ vlook = hlook->root.u.def.value;
+
+ hpp = elf_sym_hashes (abfd);
+ hppend = hpp + extsymcount;
+ for (; hpp < hppend; hpp++)
+ {
+ struct elf_link_hash_entry *h;
+
+ h = *hpp;
+ if (h != NULL && h != hlook
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->root.u.def.section == slook
+ && h->root.u.def.value == vlook)
+ {
+ hlook->weakdef = h;
+
+ /* If the weak definition is in the list of dynamic
+ symbols, make sure the real definition is put there
+ as well. */
+ if (hlook->dynindx != -1
+ && h->dynindx == -1)
+ {
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ goto error_return;
+ }
+
+ break;
+ }
+ }
+ }
+
+ if (buf != NULL)
+ {
+ free (buf);
+ buf = NULL;
+ }
+
+ /* If this object is the same format as the output object, and it is
+ not a shared library, then let the backend look through the
+ relocs.
+
+ This is required to build global offset table entries and to
+ arrange for dynamic relocs. It is not required for the
+ particular common case of linking non PIC code, even when linking
+ against shared libraries, but unfortunately there is no way of
+ knowing whether an object file has been compiled PIC or not.
+ Looking through the relocs is not particularly time consuming.
+ The problem is that we must either (1) keep the relocs in memory,
+ which causes the linker to require additional runtime memory or
+ (2) read the relocs twice from the input file, which wastes time.
+ This would be a good case for using mmap.
+
+ I have no idea how to handle linking PIC code into a file of a
+ different format. It probably can't be done. */
+ check_relocs = get_elf_backend_data (abfd)->check_relocs;
+ if (! dynamic
+ && abfd->xvec == info->hash->creator
+ && check_relocs != NULL)
+ {
+ asection *o;
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ Elf_Internal_Rela *internal_relocs;
+ boolean ok;
+
+ if ((o->flags & SEC_RELOC) == 0
+ || o->reloc_count == 0)
+ continue;
+
+ /* I believe we can ignore the relocs for any section which
+ does not form part of the final process image, such as a
+ debugging section. */
+ if ((o->flags & SEC_ALLOC) == 0)
+ continue;
+
+ internal_relocs = elf_link_read_relocs (abfd, o, (PTR) NULL,
+ (Elf_Internal_Rela *) NULL,
+ info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ ok = (*check_relocs) (abfd, info, o, internal_relocs);
+
+ if (! info->keep_memory)
+ free (internal_relocs);
+
+ if (! ok)
+ goto error_return;
+ }
+ }
+
+ return true;
+
+ error_return:
+ if (buf != NULL)
+ free (buf);
+ if (dynbuf != NULL)
+ free (dynbuf);
+ return false;
+}
+
+/* Create some sections which will be filled in with dynamic linking
+ information. ABFD is an input file which requires dynamic sections
+ to be created. The dynamic sections take up virtual memory space
+ when the final executable is run, so we need to create them before
+ addresses are assigned to the output sections. We work out the
+ actual contents and size of these sections later. */
+
+boolean
+elf_link_create_dynamic_sections (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ flagword flags;
+ register asection *s;
+ struct elf_link_hash_entry *h;
+ struct elf_backend_data *bed;
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ return true;
+
+ /* Make sure that all dynamic sections use the same input BFD. */
+ if (elf_hash_table (info)->dynobj == NULL)
+ elf_hash_table (info)->dynobj = abfd;
+ else
+ abfd = elf_hash_table (info)->dynobj;
+
+ /* Note that we set the SEC_IN_MEMORY flag for all of these
+ sections. */
+ flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+
+ /* A dynamically linked executable has a .interp section, but a
+ shared library does not. */
+ if (! info->shared)
+ {
+ s = bfd_make_section (abfd, ".interp");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
+ return false;
+ }
+
+ s = bfd_make_section (abfd, ".dynsym");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ s = bfd_make_section (abfd, ".dynstr");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
+ return false;
+
+ /* Create a strtab to hold the dynamic symbol names. */
+ if (elf_hash_table (info)->dynstr == NULL)
+ {
+ elf_hash_table (info)->dynstr = elf_stringtab_init ();
+ if (elf_hash_table (info)->dynstr == NULL)
+ return false;
+ }
+
+ s = bfd_make_section (abfd, ".dynamic");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ /* The special symbol _DYNAMIC is always set to the start of the
+ .dynamic section. This call occurs before we have processed the
+ symbols for any dynamic object, so we don't have to worry about
+ overriding a dynamic definition. We could set _DYNAMIC in a
+ linker script, but we only want to define it if we are, in fact,
+ creating a .dynamic section. We don't want to define it if there
+ is no .dynamic section, since on some ELF platforms the start up
+ code examines it to decide how to initialize the process. */
+ h = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
+ (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
+ (struct bfd_link_hash_entry **) &h)))
+ return false;
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ if (info->shared
+ && ! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return false;
+
+ s = bfd_make_section (abfd, ".hash");
+ if (s == NULL
+ || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+ || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
+ return false;
+
+ /* Let the backend create the rest of the sections. This lets the
+ backend set the right flags. The backend will normally create
+ the .got and .plt sections. */
+ bed = get_elf_backend_data (abfd);
+ if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info))
+ return false;
+
+ elf_hash_table (info)->dynamic_sections_created = true;
+
+ return true;
+}
+
+/* Add an entry to the .dynamic table. */
+
+boolean
+elf_add_dynamic_entry (info, tag, val)
+ struct bfd_link_info *info;
+ bfd_vma tag;
+ bfd_vma val;
+{
+ Elf_Internal_Dyn dyn;
+ bfd *dynobj;
+ asection *s;
+ size_t newsize;
+ bfd_byte *newcontents;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ s = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (s != NULL);
+
+ newsize = s->_raw_size + sizeof (Elf_External_Dyn);
+ if (s->contents == NULL)
+ newcontents = (bfd_byte *) malloc (newsize);
+ else
+ newcontents = (bfd_byte *) realloc (s->contents, newsize);
+ if (newcontents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ dyn.d_tag = tag;
+ dyn.d_un.d_val = val;
+ elf_swap_dyn_out (dynobj, &dyn,
+ (Elf_External_Dyn *) (newcontents + s->_raw_size));
+
+ s->_raw_size = newsize;
+ s->contents = newcontents;
+
+ return true;
+}
+
+/* Read and swap the relocs for a section. They may have been cached.
+ If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are not NULL,
+ they are used as buffers to read into. They are known to be large
+ enough. If the INTERNAL_RELOCS relocs argument is NULL, the return
+ value is allocated using either malloc or bfd_alloc, according to
+ the KEEP_MEMORY argument. */
+
+static Elf_Internal_Rela *
+elf_link_read_relocs (abfd, o, external_relocs, internal_relocs, keep_memory)
+ bfd *abfd;
+ asection *o;
+ PTR external_relocs;
+ Elf_Internal_Rela *internal_relocs;
+ boolean keep_memory;
+{
+ Elf_Internal_Shdr *rel_hdr;
+ PTR alloc1 = NULL;
+ Elf_Internal_Rela *alloc2 = NULL;
+
+ if (elf_section_data (o)->relocs != NULL)
+ return elf_section_data (o)->relocs;
+
+ if (o->reloc_count == 0)
+ return NULL;
+
+ rel_hdr = &elf_section_data (o)->rel_hdr;
+
+ if (internal_relocs == NULL)
+ {
+ size_t size;
+
+ size = o->reloc_count * sizeof (Elf_Internal_Rela);
+ if (keep_memory)
+ internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
+ else
+ internal_relocs = alloc2 = (Elf_Internal_Rela *) malloc (size);
+ if (internal_relocs == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ }
+
+ if (external_relocs == NULL)
+ {
+ alloc1 = (PTR) malloc (rel_hdr->sh_size);
+ if (alloc1 == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ external_relocs = alloc1;
+ }
+
+ if ((bfd_seek (abfd, rel_hdr->sh_offset, SEEK_SET) != 0)
+ || (bfd_read (external_relocs, 1, rel_hdr->sh_size, abfd)
+ != rel_hdr->sh_size))
+ goto error_return;
+
+ /* Swap in the relocs. For convenience, we always produce an
+ Elf_Internal_Rela array; if the relocs are Rel, we set the addend
+ to 0. */
+ if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+ Elf_External_Rel *erelend;
+ Elf_Internal_Rela *irela;
+
+ erel = (Elf_External_Rel *) external_relocs;
+ erelend = erel + o->reloc_count;
+ irela = internal_relocs;
+ for (; erel < erelend; erel++, irela++)
+ {
+ Elf_Internal_Rel irel;
+
+ elf_swap_reloc_in (abfd, erel, &irel);
+ irela->r_offset = irel.r_offset;
+ irela->r_info = irel.r_info;
+ irela->r_addend = 0;
+ }
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+ Elf_External_Rela *erelaend;
+ Elf_Internal_Rela *irela;
+
+ BFD_ASSERT (rel_hdr->sh_entsize == sizeof (Elf_External_Rela));
+
+ erela = (Elf_External_Rela *) external_relocs;
+ erelaend = erela + o->reloc_count;
+ irela = internal_relocs;
+ for (; erela < erelaend; erela++, irela++)
+ elf_swap_reloca_in (abfd, erela, irela);
+ }
+
+ /* Cache the results for next time, if we can. */
+ if (keep_memory)
+ elf_section_data (o)->relocs = internal_relocs;
+
+ if (alloc1 != NULL)
+ free (alloc1);
+
+ /* Don't free alloc2, since if it was allocated we are passing it
+ back (under the name of internal_relocs). */
+
+ return internal_relocs;
+
+ error_return:
+ if (alloc1 != NULL)
+ free (alloc1);
+ if (alloc2 != NULL)
+ free (alloc2);
+ return NULL;
+}
+
+/* Record an assignment to a symbol made by a linker script. We need
+ this in case some dynamic object refers to this symbol. */
+
+/*ARGSUSED*/
+boolean
+NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+ boolean provide;
+{
+ struct elf_link_hash_entry *h;
+
+ if (info->hash->creator->flavour != bfd_target_elf_flavour)
+ return true;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false);
+ if (h == NULL)
+ return false;
+
+ /* If this symbol is being provided by the linker script, and it is
+ currently defined by a dynamic object, but not by a regular
+ object, then mark it as undefined so that the generic linker will
+ force the correct value. */
+ if (provide
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ h->root.type = bfd_link_hash_undefined;
+
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
+ h->type = STT_OBJECT;
+
+ if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
+ | ELF_LINK_HASH_REF_DYNAMIC)) != 0
+ || info->shared)
+ && h->dynindx == -1)
+ {
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h))
+ return false;
+
+ /* If this is a weak defined symbol, and we know a corresponding
+ real symbol from the same dynamic object, make sure the real
+ symbol is also made into a dynamic symbol. */
+ if (h->weakdef != NULL
+ && h->weakdef->dynindx == -1)
+ {
+ if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/* Array used to determine the number of hash table buckets to use
+ based on the number of symbols there are. If there are fewer than
+ 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
+ fewer than 37 we use 17 buckets, and so forth. We never use more
+ than 521 buckets. */
+
+static const size_t elf_buckets[] =
+{
+ 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 0
+};
+
+/* Set up the sizes and contents of the ELF dynamic sections. This is
+ called by the ELF linker emulation before_allocation routine. We
+ must set the sizes of the sections before the linker sets the
+ addresses of the various sections. */
+
+boolean
+NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath,
+ export_dynamic, info, sinterpptr)
+ bfd *output_bfd;
+ const char *soname;
+ const char *rpath;
+ boolean export_dynamic;
+ struct bfd_link_info *info;
+ asection **sinterpptr;
+{
+ bfd *dynobj;
+ struct elf_backend_data *bed;
+
+ *sinterpptr = NULL;
+
+ if (info->hash->creator->flavour != bfd_target_elf_flavour)
+ return true;
+
+ dynobj = elf_hash_table (info)->dynobj;
+
+ /* If there were no dynamic objects in the link, there is nothing to
+ do here. */
+ if (dynobj == NULL)
+ return true;
+
+ /* If we are supposed to export all symbols into the dynamic symbol
+ table (this is not the normal case), then do so. */
+ if (export_dynamic)
+ {
+ struct elf_info_failed eif;
+
+ eif.failed = false;
+ eif.info = info;
+ elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol,
+ (PTR) &eif);
+ if (eif.failed)
+ return false;
+ }
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ struct elf_info_failed eif;
+ bfd_size_type strsize;
+
+ *sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
+ BFD_ASSERT (*sinterpptr != NULL || info->shared);
+
+ if (soname != NULL)
+ {
+ bfd_size_type indx;
+
+ indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, soname,
+ true, true);
+ if (indx == (bfd_size_type) -1
+ || ! elf_add_dynamic_entry (info, DT_SONAME, indx))
+ return false;
+ }
+
+ if (rpath != NULL)
+ {
+ bfd_size_type indx;
+
+ indx = _bfd_stringtab_add (elf_hash_table (info)->dynstr, rpath,
+ true, true);
+ if (indx == (bfd_size_type) -1
+ || ! elf_add_dynamic_entry (info, DT_RPATH, indx))
+ return false;
+ }
+
+ /* Find all symbols which were defined in a dynamic object and make
+ the backend pick a reasonable value for them. */
+ eif.failed = false;
+ eif.info = info;
+ elf_link_hash_traverse (elf_hash_table (info),
+ elf_adjust_dynamic_symbol,
+ (PTR) &eif);
+ if (eif.failed)
+ return false;
+
+ /* Add some entries to the .dynamic section. We fill in some of the
+ values later, in elf_bfd_final_link, but we must add the entries
+ now so that we know the final size of the .dynamic section. */
+ if (elf_link_hash_lookup (elf_hash_table (info), "_init", false,
+ false, false) != NULL)
+ {
+ if (! elf_add_dynamic_entry (info, DT_INIT, 0))
+ return false;
+ }
+ if (elf_link_hash_lookup (elf_hash_table (info), "_fini", false,
+ false, false) != NULL)
+ {
+ if (! elf_add_dynamic_entry (info, DT_FINI, 0))
+ return false;
+ }
+ strsize = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
+ if (! elf_add_dynamic_entry (info, DT_HASH, 0)
+ || ! elf_add_dynamic_entry (info, DT_STRTAB, 0)
+ || ! elf_add_dynamic_entry (info, DT_SYMTAB, 0)
+ || ! elf_add_dynamic_entry (info, DT_STRSZ, strsize)
+ || ! elf_add_dynamic_entry (info, DT_SYMENT,
+ sizeof (Elf_External_Sym)))
+ return false;
+ }
+
+ /* The backend must work out the sizes of all the other dynamic
+ sections. */
+ bed = get_elf_backend_data (output_bfd);
+ if (! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
+ return false;
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ size_t dynsymcount;
+ asection *s;
+ size_t i;
+ size_t bucketcount = 0;
+ Elf_Internal_Sym isym;
+
+ /* Set the size of the .dynsym and .hash sections. We counted
+ the number of dynamic symbols in elf_link_add_object_symbols.
+ We will build the contents of .dynsym and .hash when we build
+ the final symbol table, because until then we do not know the
+ correct value to give the symbols. We built the .dynstr
+ section as we went along in elf_link_add_object_symbols. */
+ dynsymcount = elf_hash_table (info)->dynsymcount;
+ s = bfd_get_section_by_name (dynobj, ".dynsym");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
+ s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
+ if (s->contents == NULL && s->_raw_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+
+ /* The first entry in .dynsym is a dummy symbol. */
+ isym.st_value = 0;
+ isym.st_size = 0;
+ isym.st_name = 0;
+ isym.st_info = 0;
+ isym.st_other = 0;
+ isym.st_shndx = 0;
+ elf_swap_symbol_out (output_bfd, &isym,
+ (char *) (Elf_External_Sym *) s->contents);
+
+ for (i = 0; elf_buckets[i] != 0; i++)
+ {
+ bucketcount = elf_buckets[i];
+ if (dynsymcount < elf_buckets[i + 1])
+ break;
+ }
+
+ s = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = (2 + bucketcount + dynsymcount) * (ARCH_SIZE / 8);
+ s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
+ if (s->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ memset (s->contents, 0, s->_raw_size);
+
+ put_word (output_bfd, bucketcount, s->contents);
+ put_word (output_bfd, dynsymcount, s->contents + (ARCH_SIZE / 8));
+
+ elf_hash_table (info)->bucketcount = bucketcount;
+
+ s = bfd_get_section_by_name (dynobj, ".dynstr");
+ BFD_ASSERT (s != NULL);
+ s->_raw_size = _bfd_stringtab_size (elf_hash_table (info)->dynstr);
+
+ if (! elf_add_dynamic_entry (info, DT_NULL, 0))
+ return false;
+ }
+
+ return true;
+}
+
+/* This routine is used to export all defined symbols into the dynamic
+ symbol table. It is called via elf_link_hash_traverse. */
+
+static boolean
+elf_export_symbol (h, data)
+ struct elf_link_hash_entry *h;
+ PTR data;
+{
+ struct elf_info_failed *eif = (struct elf_info_failed *) data;
+
+ if (h->dynindx == -1
+ && (h->elf_link_hash_flags
+ & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0)
+ {
+ if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
+ {
+ eif->failed = true;
+ return false;
+ }
+ }
+
+ return true;
+}
+
+/* Make the backend pick a good value for a dynamic symbol. This is
+ called via elf_link_hash_traverse, and also calls itself
+ recursively. */
+
+static boolean
+elf_adjust_dynamic_symbol (h, data)
+ struct elf_link_hash_entry *h;
+ PTR data;
+{
+ struct elf_info_failed *eif = (struct elf_info_failed *) data;
+ bfd *dynobj;
+ struct elf_backend_data *bed;
+
+ /* If this symbol does not require a PLT entry, and it is not
+ defined by a dynamic object, or is not referenced by a regular
+ object, ignore it. FIXME: Do we need to worry about symbols
+ which are defined by one dynamic object and referenced by another
+ one? */
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
+ && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0))
+ return true;
+
+ /* If we've already adjusted this symbol, don't do it again. This
+ can happen via a recursive call. */
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
+ return true;
+
+ /* Don't look at this symbol again. Note that we must set this
+ after checking the above conditions, because we may look at a
+ symbol once, decide not to do anything, and then get called
+ recursively later after REF_REGULAR is set below. */
+ h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
+
+ /* If this is a weak definition, and we know a real definition, and
+ the real symbol is not itself defined by a regular object file,
+ then get a good value for the real definition. We handle the
+ real symbol first, for the convenience of the backend routine.
+
+ Note that there is a confusing case here. If the real definition
+ is defined by a regular object file, we don't get the real symbol
+ from the dynamic object, but we do get the weak symbol. If the
+ processor backend uses a COPY reloc, then if some routine in the
+ dynamic object changes the real symbol, we will not see that
+ change in the corresponding weak symbol. This is the way other
+ ELF linkers work as well, and seems to be a result of the shared
+ library model.
+
+ I will clarify this issue. Most SVR4 shared libraries define the
+ variable _timezone and define timezone as a weak synonym. The
+ tzset call changes _timezone. If you write
+ extern int timezone;
+ int _timezone = 5;
+ int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
+ you might expect that, since timezone is a synonym for _timezone,
+ the same number will print both times. However, if the processor
+ backend uses a COPY reloc, then actually timezone will be copied
+ into your process image, and, since you define _timezone
+ yourself, _timezone will not. Thus timezone and _timezone will
+ wind up at different memory locations. The tzset call will set
+ _timezone, leaving timezone unchanged. */
+
+ if (h->weakdef != NULL)
+ {
+ struct elf_link_hash_entry *weakdef;
+
+ BFD_ASSERT (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak);
+ weakdef = h->weakdef;
+ BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined
+ || weakdef->root.type == bfd_link_hash_defweak);
+ BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
+ if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
+ {
+ /* This symbol is defined by a regular object file, so we
+ will not do anything special. Clear weakdef for the
+ convenience of the processor backend. */
+ h->weakdef = NULL;
+ }
+ else
+ {
+ /* There is an implicit reference by a regular object file
+ via the weak symbol. */
+ weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
+ if (! elf_adjust_dynamic_symbol (weakdef, (PTR) eif))
+ return false;
+ }
+ }
+
+ dynobj = elf_hash_table (eif->info)->dynobj;
+ bed = get_elf_backend_data (dynobj);
+ if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
+ {
+ eif->failed = true;
+ return false;
+ }
+
+ return true;
+}
+\f
+/* Final phase of ELF linker. */
+
+/* A structure we use to avoid passing large numbers of arguments. */
+
+struct elf_final_link_info
+{
+ /* General link information. */
+ struct bfd_link_info *info;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Symbol string table. */
+ struct bfd_strtab_hash *symstrtab;
+ /* .dynsym section. */
+ asection *dynsym_sec;
+ /* .hash section. */
+ asection *hash_sec;
+ /* Buffer large enough to hold contents of any section. */
+ bfd_byte *contents;
+ /* Buffer large enough to hold external relocs of any section. */
+ PTR external_relocs;
+ /* Buffer large enough to hold internal relocs of any section. */
+ Elf_Internal_Rela *internal_relocs;
+ /* Buffer large enough to hold external local symbols of any input
+ BFD. */
+ Elf_External_Sym *external_syms;
+ /* Buffer large enough to hold internal local symbols of any input
+ BFD. */
+ Elf_Internal_Sym *internal_syms;
+ /* Array large enough to hold a symbol index for each local symbol
+ of any input BFD. */
+ long *indices;
+ /* Array large enough to hold a section pointer for each local
+ symbol of any input BFD. */
+ asection **sections;
+ /* Buffer to hold swapped out symbols. */
+ Elf_External_Sym *symbuf;
+ /* Number of swapped out symbols in buffer. */
+ size_t symbuf_count;
+ /* Number of symbols which fit in symbuf. */
+ size_t symbuf_size;
+};
+
+static boolean elf_link_output_sym
+ PARAMS ((struct elf_final_link_info *, const char *,
+ Elf_Internal_Sym *, asection *));
+static boolean elf_link_flush_output_syms
+ PARAMS ((struct elf_final_link_info *));
+static boolean elf_link_output_extsym
+ PARAMS ((struct elf_link_hash_entry *, PTR));
+static boolean elf_link_input_bfd
+ PARAMS ((struct elf_final_link_info *, bfd *));
+static boolean elf_reloc_link_order
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ struct bfd_link_order *));
+
+/* This struct is used to pass information to routines called via
+ elf_link_hash_traverse which must return failure. */
+
+struct elf_finfo_failed
+{
+ boolean failed;
+ struct elf_final_link_info *finfo;
+};
+
+/* Do the final step of an ELF link. */
+
+boolean
+elf_bfd_final_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ boolean dynamic;
+ bfd *dynobj;
+ struct elf_final_link_info finfo;
+ register asection *o;
+ register struct bfd_link_order *p;
+ register bfd *sub;
+ size_t max_contents_size;
+ size_t max_external_reloc_size;
+ size_t max_internal_reloc_count;
+ size_t max_sym_count;
+ file_ptr off;
+ Elf_Internal_Sym elfsym;
+ unsigned int i;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Shdr *symstrtab_hdr;
+ struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ struct elf_finfo_failed eif;
+
+ if (info->shared)
+ abfd->flags |= DYNAMIC;
+
+ dynamic = elf_hash_table (info)->dynamic_sections_created;
+ dynobj = elf_hash_table (info)->dynobj;
+
+ finfo.info = info;
+ finfo.output_bfd = abfd;
+ finfo.symstrtab = elf_stringtab_init ();
+ if (finfo.symstrtab == NULL)
+ return false;
+ if (! dynamic)
+ {
+ finfo.dynsym_sec = NULL;
+ finfo.hash_sec = NULL;
+ }
+ else
+ {
+ finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
+ finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
+ BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL);
+ }
+ finfo.contents = NULL;
+ finfo.external_relocs = NULL;
+ finfo.internal_relocs = NULL;
+ finfo.external_syms = NULL;
+ finfo.internal_syms = NULL;
+ finfo.indices = NULL;
+ finfo.sections = NULL;
+ finfo.symbuf = NULL;
+ finfo.symbuf_count = 0;
+
+ /* Count up the number of relocations we will output for each output
+ section, so that we know the sizes of the reloc sections. We
+ also figure out some maximum sizes. */
+ max_contents_size = 0;
+ max_external_reloc_size = 0;
+ max_internal_reloc_count = 0;
+ max_sym_count = 0;
+ for (o = abfd->sections; o != (asection *) NULL; o = o->next)
+ {
+ o->reloc_count = 0;
+
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ ++o->reloc_count;
+ else if (p->type == bfd_indirect_link_order)
+ {
+ asection *sec;
+
+ sec = p->u.indirect.section;
+
+ if (info->relocateable)
+ o->reloc_count += sec->reloc_count;
+
+ if (sec->_raw_size > max_contents_size)
+ max_contents_size = sec->_raw_size;
+ if (sec->_cooked_size > max_contents_size)
+ max_contents_size = sec->_cooked_size;
+
+ /* We are interested in just local symbols, not all
+ symbols. */
+ if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour)
+ {
+ size_t sym_count;
+
+ if (elf_bad_symtab (sec->owner))
+ sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
+ / sizeof (Elf_External_Sym));
+ else
+ sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
+
+ if (sym_count > max_sym_count)
+ max_sym_count = sym_count;
+
+ if ((sec->flags & SEC_RELOC) != 0)
+ {
+ size_t ext_size;
+
+ ext_size = elf_section_data (sec)->rel_hdr.sh_size;
+ if (ext_size > max_external_reloc_size)
+ max_external_reloc_size = ext_size;
+ if (sec->reloc_count > max_internal_reloc_count)
+ max_internal_reloc_count = sec->reloc_count;
+ }
+ }
+ }
+ }
+
+ if (o->reloc_count > 0)
+ o->flags |= SEC_RELOC;
+ else
+ {
+ /* Explicitly clear the SEC_RELOC flag. The linker tends to
+ set it (this is probably a bug) and if it is set
+ assign_section_numbers will create a reloc section. */
+ o->flags &=~ SEC_RELOC;
+ }
+
+ /* If the SEC_ALLOC flag is not set, force the section VMA to
+ zero. This is done in elf_fake_sections as well, but forcing
+ the VMA to 0 here will ensure that relocs against these
+ sections are handled correctly. */
+ if ((o->flags & SEC_ALLOC) == 0)
+ o->vma = 0;
+ }
+
+ /* Figure out the file positions for everything but the symbol table
+ and the relocs. We set symcount to force assign_section_numbers
+ to create a symbol table. */
+ abfd->symcount = info->strip == strip_all ? 0 : 1;
+ BFD_ASSERT (! abfd->output_has_begun);
+ if (! _bfd_elf_compute_section_file_positions (abfd, info))
+ goto error_return;
+
+ /* That created the reloc sections. Set their sizes, and assign
+ them file positions, and allocate some buffers. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Shdr *rel_hdr;
+ register struct elf_link_hash_entry **p, **pend;
+
+ rel_hdr = &elf_section_data (o)->rel_hdr;
+
+ rel_hdr->sh_size = rel_hdr->sh_entsize * o->reloc_count;
+
+ /* The contents field must last into write_object_contents,
+ so we allocate it with bfd_alloc rather than malloc. */
+ rel_hdr->contents = (PTR) bfd_alloc (abfd, rel_hdr->sh_size);
+ if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ p = ((struct elf_link_hash_entry **)
+ malloc (o->reloc_count
+ * sizeof (struct elf_link_hash_entry *)));
+ if (p == NULL && o->reloc_count != 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+ elf_section_data (o)->rel_hashes = p;
+ pend = p + o->reloc_count;
+ for (; p < pend; p++)
+ *p = NULL;
+
+ /* Use the reloc_count field as an index when outputting the
+ relocs. */
+ o->reloc_count = 0;
+ }
+ }
+
+ _bfd_elf_assign_file_positions_for_relocs (abfd);
+
+ /* We have now assigned file positions for all the sections except
+ .symtab and .strtab. We start the .symtab section at the current
+ file position, and write directly to it. We build the .strtab
+ section in memory. When we add .dynsym support, we will build
+ that in memory as well (.dynsym is smaller than .symtab). */
+ abfd->symcount = 0;
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ /* sh_name is set in prep_headers. */
+ symtab_hdr->sh_type = SHT_SYMTAB;
+ symtab_hdr->sh_flags = 0;
+ symtab_hdr->sh_addr = 0;
+ symtab_hdr->sh_size = 0;
+ symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
+ /* sh_link is set in assign_section_numbers. */
+ /* sh_info is set below. */
+ /* sh_offset is set just below. */
+ symtab_hdr->sh_addralign = 4; /* FIXME: system dependent? */
+
+ off = elf_tdata (abfd)->next_file_pos;
+ off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true);
+
+ /* Note that at this point elf_tdata (abfd)->next_file_pos is
+ incorrect. We do not yet know the size of the .symtab section.
+ We correct next_file_pos below, after we do know the size. */
+
+ /* Allocate a buffer to hold swapped out symbols. This is to avoid
+ continuously seeking to the right position in the file. */
+ if (! info->keep_memory || max_sym_count < 20)
+ finfo.symbuf_size = 20;
+ else
+ finfo.symbuf_size = max_sym_count;
+ finfo.symbuf = ((Elf_External_Sym *)
+ malloc (finfo.symbuf_size * sizeof (Elf_External_Sym)));
+ if (finfo.symbuf == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* Start writing out the symbol table. The first symbol is always a
+ dummy symbol. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = 0;
+ elfsym.st_other = 0;
+ elfsym.st_shndx = SHN_UNDEF;
+ if (! elf_link_output_sym (&finfo, (const char *) NULL,
+ &elfsym, bfd_und_section_ptr))
+ goto error_return;
+
+#if 0
+ /* Some standard ELF linkers do this, but we don't because it causes
+ bootstrap comparison failures. */
+ /* Output a file symbol for the output file as the second symbol.
+ We output this even if we are discarding local symbols, although
+ I'm not sure if this is correct. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
+ elfsym.st_other = 0;
+ elfsym.st_shndx = SHN_ABS;
+ if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd),
+ &elfsym, bfd_abs_section_ptr))
+ goto error_return;
+#endif
+
+ /* Output a symbol for each section. We output these even if we are
+ discarding local symbols, since they are used for relocs. These
+ symbols have no names. We store the index of each one in the
+ index field of the section, so that we can find it again when
+ outputting relocs. */
+ elfsym.st_value = 0;
+ elfsym.st_size = 0;
+ elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+ elfsym.st_other = 0;
+ for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
+ {
+ o = section_from_elf_index (abfd, i);
+ if (o != NULL)
+ o->target_index = abfd->symcount;
+ elfsym.st_shndx = i;
+ if (! elf_link_output_sym (&finfo, (const char *) NULL,
+ &elfsym, o))
+ goto error_return;
+ }
+
+ /* Allocate some memory to hold information read in from the input
+ files. */
+ finfo.contents = (bfd_byte *) malloc (max_contents_size);
+ finfo.external_relocs = (PTR) malloc (max_external_reloc_size);
+ finfo.internal_relocs = ((Elf_Internal_Rela *)
+ malloc (max_internal_reloc_count
+ * sizeof (Elf_Internal_Rela)));
+ finfo.external_syms = ((Elf_External_Sym *)
+ malloc (max_sym_count * sizeof (Elf_External_Sym)));
+ finfo.internal_syms = ((Elf_Internal_Sym *)
+ malloc (max_sym_count * sizeof (Elf_Internal_Sym)));
+ finfo.indices = (long *) malloc (max_sym_count * sizeof (long));
+ finfo.sections = (asection **) malloc (max_sym_count * sizeof (asection *));
+ if ((finfo.contents == NULL && max_contents_size != 0)
+ || (finfo.external_relocs == NULL && max_external_reloc_size != 0)
+ || (finfo.internal_relocs == NULL && max_internal_reloc_count != 0)
+ || (finfo.external_syms == NULL && max_sym_count != 0)
+ || (finfo.internal_syms == NULL && max_sym_count != 0)
+ || (finfo.indices == NULL && max_sym_count != 0)
+ || (finfo.sections == NULL && max_sym_count != 0))
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
+
+ /* Since ELF permits relocations to be against local symbols, we
+ must have the local symbols available when we do the relocations.
+ Since we would rather only read the local symbols once, and we
+ would rather not keep them in memory, we handle all the
+ relocations for a single input file at the same time.
+
+ Unfortunately, there is no way to know the total number of local
+ symbols until we have seen all of them, and the local symbol
+ indices precede the global symbol indices. This means that when
+ we are generating relocateable output, and we see a reloc against
+ a global symbol, we can not know the symbol index until we have
+ finished examining all the local symbols to see which ones we are
+ going to output. To deal with this, we keep the relocations in
+ memory, and don't output them until the end of the link. This is
+ an unfortunate waste of memory, but I don't see a good way around
+ it. Fortunately, it only happens when performing a relocateable
+ link, which is not the common case. FIXME: If keep_memory is set
+ we could write the relocs out and then read them again; I don't
+ know how bad the memory loss will be. */
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->next)
+ sub->output_has_begun = false;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ for (p = o->link_order_head; p != NULL; p = p->next)
+ {
+ if (p->type == bfd_indirect_link_order
+ && (bfd_get_flavour (p->u.indirect.section->owner)
+ == bfd_target_elf_flavour))
+ {
+ sub = p->u.indirect.section->owner;
+ if (! sub->output_has_begun)
+ {
+ if (! elf_link_input_bfd (&finfo, sub))
+ goto error_return;
+ sub->output_has_begun = true;
+ }
+ }
+ else if (p->type == bfd_section_reloc_link_order
+ || p->type == bfd_symbol_reloc_link_order)
+ {
+ if (! elf_reloc_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ else
+ {
+ if (! _bfd_default_link_order (abfd, info, o, p))
+ goto error_return;
+ }
+ }
+ }
+
+ /* That wrote out all the local symbols. Finish up the symbol table
+ with the global symbols. */
+
+ /* The sh_info field records the index of the first non local
+ symbol. */
+ symtab_hdr->sh_info = abfd->symcount;
+ if (dynamic)
+ elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info = 1;
+
+ /* We get the global symbols from the hash table. */
+ eif.failed = false;
+ eif.finfo = &finfo;
+ elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
+ (PTR) &eif);
+ if (eif.failed)
+ return false;
+
+ /* Flush all symbols to the file. */
+ if (! elf_link_flush_output_syms (&finfo))
+ return false;
+
+ /* Now we know the size of the symtab section. */
+ off += symtab_hdr->sh_size;
+
+ /* Finish up and write out the symbol string table (.strtab)
+ section. */
+ symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
+ /* sh_name was set in prep_headers. */
+ symstrtab_hdr->sh_type = SHT_STRTAB;
+ symstrtab_hdr->sh_flags = 0;
+ symstrtab_hdr->sh_addr = 0;
+ symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
+ symstrtab_hdr->sh_entsize = 0;
+ symstrtab_hdr->sh_link = 0;
+ symstrtab_hdr->sh_info = 0;
+ /* sh_offset is set just below. */
+ symstrtab_hdr->sh_addralign = 1;
+
+ off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true);
+ elf_tdata (abfd)->next_file_pos = off;
+
+ if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
+ return false;
+
+ /* Adjust the relocs to have the correct symbol indices. */
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct elf_link_hash_entry **rel_hash;
+ Elf_Internal_Shdr *rel_hdr;
+
+ if ((o->flags & SEC_RELOC) == 0)
+ continue;
+
+ rel_hash = elf_section_data (o)->rel_hashes;
+ rel_hdr = &elf_section_data (o)->rel_hdr;
+ for (i = 0; i < o->reloc_count; i++, rel_hash++)
+ {
+ if (*rel_hash == NULL)
+ continue;
+
+ BFD_ASSERT ((*rel_hash)->indx >= 0);
+
+ if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+ Elf_Internal_Rel irel;
+
+ erel = (Elf_External_Rel *) rel_hdr->contents + i;
+ elf_swap_reloc_in (abfd, erel, &irel);
+ irel.r_info = ELF_R_INFO ((*rel_hash)->indx,
+ ELF_R_TYPE (irel.r_info));
+ elf_swap_reloc_out (abfd, &irel, erel);
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+ Elf_Internal_Rela irela;
+
+ BFD_ASSERT (rel_hdr->sh_entsize
+ == sizeof (Elf_External_Rela));
+
+ erela = (Elf_External_Rela *) rel_hdr->contents + i;
+ elf_swap_reloca_in (abfd, erela, &irela);
+ irela.r_info = ELF_R_INFO ((*rel_hash)->indx,
+ ELF_R_TYPE (irela.r_info));
+ elf_swap_reloca_out (abfd, &irela, erela);
+ }
+ }
+
+ /* Set the reloc_count field to 0 to prevent write_relocs from
+ trying to swap the relocs out itself. */
+ o->reloc_count = 0;
+ }
+
+ /* If we are linking against a dynamic object, or generating a
+ shared library, finish up the dynamic linking information. */
+ if (dynamic)
+ {
+ Elf_External_Dyn *dyncon, *dynconend;
+
+ /* Fix up .dynamic entries. */
+ o = bfd_get_section_by_name (dynobj, ".dynamic");
+ BFD_ASSERT (o != NULL);
+
+ dyncon = (Elf_External_Dyn *) o->contents;
+ dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ const char *name;
+ unsigned int type;
+
+ elf_swap_dyn_in (dynobj, dyncon, &dyn);
+
+ switch (dyn.d_tag)
+ {
+ default:
+ break;
+
+ /* SVR4 linkers seem to set DT_INIT and DT_FINI based on
+ magic _init and _fini symbols. This is pretty ugly,
+ but we are compatible. */
+ case DT_INIT:
+ name = "_init";
+ goto get_sym;
+ case DT_FINI:
+ name = "_fini";
+ get_sym:
+ {
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), name,
+ false, false, true);
+ BFD_ASSERT (h != NULL);
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ dyn.d_un.d_val = h->root.u.def.value;
+ o = h->root.u.def.section;
+ if (o->output_section != NULL)
+ dyn.d_un.d_val += (o->output_section->vma
+ + o->output_offset);
+ else
+ /* The symbol is imported from another shared
+ library and does not apply to this one. */
+ dyn.d_un.d_val = 0;
+ }
+ elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ }
+ break;
+
+ case DT_HASH:
+ name = ".hash";
+ goto get_vma;
+ case DT_STRTAB:
+ name = ".dynstr";
+ goto get_vma;
+ case DT_SYMTAB:
+ name = ".dynsym";
+ get_vma:
+ o = bfd_get_section_by_name (abfd, name);
+ BFD_ASSERT (o != NULL);
+ dyn.d_un.d_ptr = o->vma;
+ elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ break;
+
+ case DT_REL:
+ case DT_RELA:
+ case DT_RELSZ:
+ case DT_RELASZ:
+ if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
+ type = SHT_REL;
+ else
+ type = SHT_RELA;
+ dyn.d_un.d_val = 0;
+ for (i = 1; i < elf_elfheader (abfd)->e_shnum; i++)
+ {
+ Elf_Internal_Shdr *hdr;
+
+ hdr = elf_elfsections (abfd)[i];
+ if (hdr->sh_type == type
+ && (hdr->sh_flags & SHF_ALLOC) != 0)
+ {
+ if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
+ dyn.d_un.d_val += hdr->sh_size;
+ else
+ {
+ if (dyn.d_un.d_val == 0
+ || hdr->sh_addr < dyn.d_un.d_val)
+ dyn.d_un.d_val = hdr->sh_addr;
+ }
+ }
+ }
+ elf_swap_dyn_out (dynobj, &dyn, dyncon);
+ break;
+ }
+ }
+ }
+
+ /* If we have created any dynamic sections, then output them. */
+ if (dynobj != NULL)
+ {
+ if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
+ goto error_return;
+
+ for (o = dynobj->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) == 0
+ || o->_raw_size == 0)
+ continue;
+ if ((o->flags & SEC_IN_MEMORY) == 0)
+ {
+ /* At this point, we are only interested in sections
+ created by elf_link_create_dynamic_sections. FIXME:
+ This test is fragile. */
+ continue;
+ }
+ if ((elf_section_data (o->output_section)->this_hdr.sh_type
+ != SHT_STRTAB)
+ || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
+ {
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents, o->output_offset,
+ o->_raw_size))
+ goto error_return;
+ }
+ else
+ {
+ file_ptr off;
+
+ /* The contents of the .dynstr section are actually in a
+ stringtab. */
+ off = elf_section_data (o->output_section)->this_hdr.sh_offset;
+ if (bfd_seek (abfd, off, SEEK_SET) != 0
+ || ! _bfd_stringtab_emit (abfd,
+ elf_hash_table (info)->dynstr))
+ goto error_return;
+ }
+ }
+ }
+
+ if (finfo.symstrtab != NULL)
+ _bfd_stringtab_free (finfo.symstrtab);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ elf_tdata (abfd)->linker = true;
+
+ return true;
+
+ error_return:
+ if (finfo.symstrtab != NULL)
+ _bfd_stringtab_free (finfo.symstrtab);
+ if (finfo.contents != NULL)
+ free (finfo.contents);
+ if (finfo.external_relocs != NULL)
+ free (finfo.external_relocs);
+ if (finfo.internal_relocs != NULL)
+ free (finfo.internal_relocs);
+ if (finfo.external_syms != NULL)
+ free (finfo.external_syms);
+ if (finfo.internal_syms != NULL)
+ free (finfo.internal_syms);
+ if (finfo.indices != NULL)
+ free (finfo.indices);
+ if (finfo.sections != NULL)
+ free (finfo.sections);
+ if (finfo.symbuf != NULL)
+ free (finfo.symbuf);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_RELOC) != 0
+ && elf_section_data (o)->rel_hashes != NULL)
+ free (elf_section_data (o)->rel_hashes);
+ }
+
+ return false;
+}
+
+/* Add a symbol to the output symbol table. */
+
+static boolean
+elf_link_output_sym (finfo, name, elfsym, input_sec)
+ struct elf_final_link_info *finfo;
+ const char *name;
+ Elf_Internal_Sym *elfsym;
+ asection *input_sec;
+{
+ boolean (*output_symbol_hook) PARAMS ((bfd *,
+ struct bfd_link_info *info,
+ const char *,
+ Elf_Internal_Sym *,
+ asection *));
+
+ output_symbol_hook = get_elf_backend_data (finfo->output_bfd)->
+ elf_backend_link_output_symbol_hook;
+ if (output_symbol_hook != NULL)
+ {
+ if (! ((*output_symbol_hook)
+ (finfo->output_bfd, finfo->info, name, elfsym, input_sec)))
+ return false;
+ }
+
+ if (name == (const char *) NULL || *name == '\0')
+ elfsym->st_name = 0;
+ else
+ {
+ elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
+ name, true,
+ false);
+ if (elfsym->st_name == (unsigned long) -1)
+ return false;
+ }
+
+ if (finfo->symbuf_count >= finfo->symbuf_size)
+ {
+ if (! elf_link_flush_output_syms (finfo))
+ return false;
+ }
+
+ elf_swap_symbol_out (finfo->output_bfd, elfsym,
+ (char *) (finfo->symbuf + finfo->symbuf_count));
+ ++finfo->symbuf_count;
+
+ ++finfo->output_bfd->symcount;
+
+ return true;
+}
+
+/* Flush the output symbols to the file. */
+
+static boolean
+elf_link_flush_output_syms (finfo)
+ struct elf_final_link_info *finfo;
+{
+ Elf_Internal_Shdr *symtab;
+
+ symtab = &elf_tdata (finfo->output_bfd)->symtab_hdr;
+
+ if (bfd_seek (finfo->output_bfd, symtab->sh_offset + symtab->sh_size,
+ SEEK_SET) != 0
+ || (bfd_write ((PTR) finfo->symbuf, finfo->symbuf_count,
+ sizeof (Elf_External_Sym), finfo->output_bfd)
+ != finfo->symbuf_count * sizeof (Elf_External_Sym)))
+ return false;
+
+ symtab->sh_size += finfo->symbuf_count * sizeof (Elf_External_Sym);
+
+ finfo->symbuf_count = 0;
+
+ return true;
+}
+
+/* Add an external symbol to the symbol table. This is called from
+ the hash table traversal routine. */
+
+static boolean
+elf_link_output_extsym (h, data)
+ struct elf_link_hash_entry *h;
+ PTR data;
+{
+ struct elf_finfo_failed *eif = (struct elf_finfo_failed *) data;
+ struct elf_final_link_info *finfo = eif->finfo;
+ boolean strip;
+ Elf_Internal_Sym sym;
+ asection *input_sec;
+
+ /* If we are not creating a shared library, and this symbol is
+ referenced by a shared library but is not defined anywhere, then
+ warn that it is undefined. If we do not do this, the runtime
+ linker will complain that the symbol is undefined when the
+ program is run. We don't have to worry about symbols that are
+ referenced by regular files, because we will already have issued
+ warnings for them. */
+ if (! finfo->info->relocateable
+ && ! finfo->info->shared
+ && h->root.type == bfd_link_hash_undefined
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ {
+ if (! ((*finfo->info->callbacks->undefined_symbol)
+ (finfo->info, h->root.root.string, h->root.u.undef.abfd,
+ (asection *) NULL, 0)))
+ {
+ eif->failed = true;
+ return false;
+ }
+ }
+
+ /* We don't want to output symbols that have never been mentioned by
+ a regular file, or that we have been told to strip. However, if
+ h->indx is set to -2, the symbol is used by a reloc and we must
+ output it. */
+ if (h->indx == -2)
+ strip = false;
+ else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+ || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
+ && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
+ strip = true;
+ else if (finfo->info->strip == strip_all
+ || (finfo->info->strip == strip_some
+ && bfd_hash_lookup (finfo->info->keep_hash,
+ h->root.root.string,
+ false, false) == NULL))
+ strip = true;
+ else
+ strip = false;
+
+ /* If we're stripping it, and it's not a dynamic symbol, there's
+ nothing else to do. */
+ if (strip && h->dynindx == -1)
+ return true;
+
+ sym.st_value = 0;
+ sym.st_size = h->size;
+ sym.st_other = 0;
+ if (h->root.type == bfd_link_hash_undefweak
+ || h->root.type == bfd_link_hash_defweak)
+ sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
+ else
+ sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
+
+ switch (h->root.type)
+ {
+ default:
+ case bfd_link_hash_new:
+ abort ();
+ return false;
+
+ case bfd_link_hash_undefined:
+ input_sec = bfd_und_section_ptr;
+ sym.st_shndx = SHN_UNDEF;
+ break;
+
+ case bfd_link_hash_undefweak:
+ input_sec = bfd_und_section_ptr;
+ sym.st_shndx = SHN_UNDEF;
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ {
+ input_sec = h->root.u.def.section;
+ if (input_sec->output_section != NULL)
+ {
+ sym.st_shndx =
+ _bfd_elf_section_from_bfd_section (finfo->output_bfd,
+ input_sec->output_section);
+ if (sym.st_shndx == (unsigned short) -1)
+ {
+ eif->failed = true;
+ return false;
+ }
+
+ /* ELF symbols in relocateable files are section relative,
+ but in nonrelocateable files they are virtual
+ addresses. */
+ sym.st_value = h->root.u.def.value + input_sec->output_offset;
+ if (! finfo->info->relocateable)
+ sym.st_value += input_sec->output_section->vma;
+ }
+ else
+ {
+ BFD_ASSERT ((bfd_get_flavour (input_sec->owner)
+ == bfd_target_elf_flavour)
+ && elf_elfheader (input_sec->owner)->e_type == ET_DYN);
+ sym.st_shndx = SHN_UNDEF;
+ input_sec = bfd_und_section_ptr;
+ }
+ }
+ break;
+
+ case bfd_link_hash_common:
+ input_sec = bfd_com_section_ptr;
+ sym.st_shndx = SHN_COMMON;
+ sym.st_value = 1 << h->root.u.c.p->alignment_power;
+ break;
+
+ case bfd_link_hash_indirect:
+ case bfd_link_hash_warning:
+ /* I have no idea how these should be handled. */
+ return true;
+ }
+
+ /* If this symbol should be put in the .dynsym section, then put it
+ there now. We have already know the symbol index. We also fill
+ in the entry in the .hash section. */
+ if (h->dynindx != -1
+ && elf_hash_table (finfo->info)->dynamic_sections_created)
+ {
+ struct elf_backend_data *bed;
+ size_t bucketcount;
+ size_t bucket;
+ bfd_byte *bucketpos;
+ bfd_vma chain;
+
+ sym.st_name = h->dynstr_index;
+
+ /* Give the processor backend a chance to tweak the symbol
+ value, and also to finish up anything that needs to be done
+ for this symbol. */
+ bed = get_elf_backend_data (finfo->output_bfd);
+ if (! ((*bed->elf_backend_finish_dynamic_symbol)
+ (finfo->output_bfd, finfo->info, h, &sym)))
+ {
+ eif->failed = true;
+ return false;
+ }
+
+ elf_swap_symbol_out (finfo->output_bfd, &sym,
+ (char *) ((Elf_External_Sym *) finfo->dynsym_sec->contents
+ + h->dynindx));
+
+ bucketcount = elf_hash_table (finfo->info)->bucketcount;
+ bucket = (bfd_elf_hash ((const unsigned char *) h->root.root.string)
+ % bucketcount);
+ bucketpos = ((bfd_byte *) finfo->hash_sec->contents
+ + (bucket + 2) * (ARCH_SIZE / 8));
+ chain = get_word (finfo->output_bfd, bucketpos);
+ put_word (finfo->output_bfd, h->dynindx, bucketpos);
+ put_word (finfo->output_bfd, chain,
+ ((bfd_byte *) finfo->hash_sec->contents
+ + (bucketcount + 2 + h->dynindx) * (ARCH_SIZE / 8)));
+ }
+
+ /* If we're stripping it, then it was just a dynamic symbol, and
+ there's nothing else to do. */
+ if (strip)
+ return true;
+
+ h->indx = finfo->output_bfd->symcount;
+
+ if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec))
+ {
+ eif->failed = true;
+ return false;
+ }
+
+ return true;
+}
+
+/* Link an input file into the linker output file. This function
+ handles all the sections and relocations of the input file at once.
+ This is so that we only have to read the local symbols once, and
+ don't have to keep them in memory. */
+
+static boolean
+elf_link_input_bfd (finfo, input_bfd)
+ struct elf_final_link_info *finfo;
+ bfd *input_bfd;
+{
+ boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
+ bfd *, asection *, bfd_byte *,
+ Elf_Internal_Rela *,
+ Elf_Internal_Sym *, asection **));
+ bfd *output_bfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ size_t locsymcount;
+ size_t extsymoff;
+ Elf_External_Sym *esym;
+ Elf_External_Sym *esymend;
+ Elf_Internal_Sym *isym;
+ long *pindex;
+ asection **ppsection;
+ asection *o;
+
+ output_bfd = finfo->output_bfd;
+ relocate_section =
+ get_elf_backend_data (output_bfd)->elf_backend_relocate_section;
+
+ /* If this is a dynamic object, we don't want to do anything here:
+ we don't want the local symbols, and we don't want the section
+ contents. */
+ if (elf_elfheader (input_bfd)->e_type == ET_DYN)
+ return true;
+
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (elf_bad_symtab (input_bfd))
+ {
+ locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
+ extsymoff = 0;
+ }
+ else
+ {
+ locsymcount = symtab_hdr->sh_info;
+ extsymoff = symtab_hdr->sh_info;
+ }
+
+ /* Read the local symbols. */
+ if (locsymcount > 0
+ && (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
+ || (bfd_read (finfo->external_syms, sizeof (Elf_External_Sym),
+ locsymcount, input_bfd)
+ != locsymcount * sizeof (Elf_External_Sym))))
+ return false;
+
+ /* Swap in the local symbols and write out the ones which we know
+ are going into the output file. */
+ esym = finfo->external_syms;
+ esymend = esym + locsymcount;
+ isym = finfo->internal_syms;
+ pindex = finfo->indices;
+ ppsection = finfo->sections;
+ for (; esym < esymend; esym++, isym++, pindex++, ppsection++)
+ {
+ asection *isec;
+ const char *name;
+ Elf_Internal_Sym osym;
+
+ elf_swap_symbol_in (input_bfd, esym, isym);
+ *pindex = -1;
+
+ if (elf_bad_symtab (input_bfd))
+ {
+ if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
+ {
+ *ppsection = NULL;
+ continue;
+ }
+ }
+
+ if (isym->st_shndx == SHN_UNDEF)
+ isec = bfd_und_section_ptr;
+ else if (isym->st_shndx > 0 && isym->st_shndx < SHN_LORESERVE)
+ isec = section_from_elf_index (input_bfd, isym->st_shndx);
+ else if (isym->st_shndx == SHN_ABS)
+ isec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ isec = bfd_com_section_ptr;
+ else
+ {
+ /* Who knows? */
+ isec = NULL;
+ }
+
+ *ppsection = isec;
+
+ /* Don't output the first, undefined, symbol. */
+ if (esym == finfo->external_syms)
+ continue;
+
+ /* If we are stripping all symbols, we don't want to output this
+ one. */
+ if (finfo->info->strip == strip_all)
+ continue;
+
+ /* We never output section symbols. Instead, we use the section
+ symbol of the corresponding section in the output file. */
+ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
+ continue;
+
+ /* If we are discarding all local symbols, we don't want to
+ output this one. If we are generating a relocateable output
+ file, then some of the local symbols may be required by
+ relocs; we output them below as we discover that they are
+ needed. */
+ if (finfo->info->discard == discard_all)
+ continue;
+
+ /* Get the name of the symbol. */
+ name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
+ isym->st_name);
+ if (name == NULL)
+ return false;
+
+ /* See if we are discarding symbols with this name. */
+ if ((finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
+ == NULL))
+ || (finfo->info->discard == discard_l
+ && strncmp (name, finfo->info->lprefix,
+ finfo->info->lprefix_len) == 0))
+ continue;
+
+ /* If we get here, we are going to output this symbol. */
+
+ osym = *isym;
+
+ /* Adjust the section index for the output file. */
+ osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
+ isec->output_section);
+ if (osym.st_shndx == (unsigned short) -1)
+ return false;
+
+ *pindex = output_bfd->symcount;
+
+ /* ELF symbols in relocateable files are section relative, but
+ in executable files they are virtual addresses. Note that
+ this code assumes that all ELF sections have an associated
+ BFD section with a reasonable value for output_offset; below
+ we assume that they also have a reasonable value for
+ output_section. Any special sections must be set up to meet
+ these requirements. */
+ osym.st_value += isec->output_offset;
+ if (! finfo->info->relocateable)
+ osym.st_value += isec->output_section->vma;
+
+ if (! elf_link_output_sym (finfo, name, &osym, isec))
+ return false;
+ }
+
+ /* Relocate the contents of each section. */
+ for (o = input_bfd->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) == 0)
+ continue;
+
+ if ((o->flags & SEC_IN_MEMORY) != 0
+ && input_bfd == elf_hash_table (finfo->info)->dynobj)
+ {
+ /* Section was created by elf_link_create_dynamic_sections.
+ FIXME: This test is fragile. */
+ continue;
+ }
+
+ /* Read the contents of the section. */
+ if (! bfd_get_section_contents (input_bfd, o, finfo->contents,
+ (file_ptr) 0, o->_raw_size))
+ return false;
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ Elf_Internal_Rela *internal_relocs;
+
+ /* Get the swapped relocs. */
+ internal_relocs = elf_link_read_relocs (input_bfd, o,
+ finfo->external_relocs,
+ finfo->internal_relocs,
+ false);
+ if (internal_relocs == NULL
+ && o->reloc_count > 0)
+ return false;
+
+ /* Relocate the section by invoking a back end routine.
+
+ The back end routine is responsible for adjusting the
+ section contents as necessary, and (if using Rela relocs
+ and generating a relocateable output file) adjusting the
+ reloc addend as necessary.
+
+ The back end routine does not have to worry about setting
+ the reloc address or the reloc symbol index.
+
+ The back end routine is given a pointer to the swapped in
+ internal symbols, and can access the hash table entries
+ for the external symbols via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, the back end routine
+ must handle STB_LOCAL/STT_SECTION symbols specially. The
+ output symbol is going to be a section symbol
+ corresponding to the output section, which will require
+ the addend to be adjusted. */
+
+ if (! (*relocate_section) (output_bfd, finfo->info,
+ input_bfd, o,
+ finfo->contents,
+ internal_relocs,
+ finfo->internal_syms,
+ finfo->sections))
+ return false;
+
+ if (finfo->info->relocateable)
+ {
+ Elf_Internal_Rela *irela;
+ Elf_Internal_Rela *irelaend;
+ struct elf_link_hash_entry **rel_hash;
+ Elf_Internal_Shdr *input_rel_hdr;
+ Elf_Internal_Shdr *output_rel_hdr;
+
+ /* Adjust the reloc addresses and symbol indices. */
+
+ irela = internal_relocs;
+ irelaend = irela + o->reloc_count;
+ rel_hash = (elf_section_data (o->output_section)->rel_hashes
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, rel_hash++)
+ {
+ long r_symndx;
+ Elf_Internal_Sym *isym;
+ asection *sec;
+
+ irela->r_offset += o->output_offset;
+
+ r_symndx = ELF_R_SYM (irela->r_info);
+
+ if (r_symndx == 0)
+ continue;
+
+ if (r_symndx >= locsymcount
+ || (elf_bad_symtab (input_bfd)
+ && finfo->sections[r_symndx] == NULL))
+ {
+ long indx;
+
+ /* This is a reloc against a global symbol. We
+ have not yet output all the local symbols, so
+ we do not know the symbol index of any global
+ symbol. We set the rel_hash entry for this
+ reloc to point to the global hash table entry
+ for this symbol. The symbol index is then
+ set at the end of elf_bfd_final_link. */
+ indx = r_symndx - extsymoff;
+ *rel_hash = elf_sym_hashes (input_bfd)[indx];
+
+ /* Setting the index to -2 tells
+ elf_link_output_extsym that this symbol is
+ used by a reloc. */
+ BFD_ASSERT ((*rel_hash)->indx < 0);
+ (*rel_hash)->indx = -2;
+
+ continue;
+ }
+
+ /* This is a reloc against a local symbol. */
+
+ *rel_hash = NULL;
+ isym = finfo->internal_syms + r_symndx;
+ sec = finfo->sections[r_symndx];
+ if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
+ {
+ /* I suppose the backend ought to fill in the
+ section of any STT_SECTION symbol against a
+ processor specific section. */
+ if (sec != NULL && bfd_is_abs_section (sec))
+ r_symndx = 0;
+ else if (sec == NULL || sec->owner == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ else
+ {
+ r_symndx = sec->output_section->target_index;
+ BFD_ASSERT (r_symndx != 0);
+ }
+ }
+ else
+ {
+ if (finfo->indices[r_symndx] == -1)
+ {
+ unsigned long link;
+ const char *name;
+ asection *osec;
+
+ if (finfo->info->strip == strip_all)
+ {
+ /* You can't do ld -r -s. */
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ /* This symbol was skipped earlier, but
+ since it is needed by a reloc, we
+ must output it now. */
+ link = symtab_hdr->sh_link;
+ name = bfd_elf_string_from_elf_section (input_bfd,
+ link,
+ isym->st_name);
+ if (name == NULL)
+ return false;
+
+ osec = sec->output_section;
+ isym->st_shndx =
+ _bfd_elf_section_from_bfd_section (output_bfd,
+ osec);
+ if (isym->st_shndx == (unsigned short) -1)
+ return false;
+
+ isym->st_value += sec->output_offset;
+ if (! finfo->info->relocateable)
+ isym->st_value += osec->vma;
+
+ finfo->indices[r_symndx] = output_bfd->symcount;
+
+ if (! elf_link_output_sym (finfo, name, isym, sec))
+ return false;
+ }
+
+ r_symndx = finfo->indices[r_symndx];
+ }
+
+ irela->r_info = ELF_R_INFO (r_symndx,
+ ELF_R_TYPE (irela->r_info));
+ }
+
+ /* Swap out the relocs. */
+ input_rel_hdr = &elf_section_data (o)->rel_hdr;
+ output_rel_hdr = &elf_section_data (o->output_section)->rel_hdr;
+ BFD_ASSERT (output_rel_hdr->sh_entsize
+ == input_rel_hdr->sh_entsize);
+ irela = internal_relocs;
+ irelaend = irela + o->reloc_count;
+ if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
+ {
+ Elf_External_Rel *erel;
+
+ erel = ((Elf_External_Rel *) output_rel_hdr->contents
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, erel++)
+ {
+ Elf_Internal_Rel irel;
+
+ irel.r_offset = irela->r_offset;
+ irel.r_info = irela->r_info;
+ BFD_ASSERT (irela->r_addend == 0);
+ elf_swap_reloc_out (output_bfd, &irel, erel);
+ }
+ }
+ else
+ {
+ Elf_External_Rela *erela;
+
+ BFD_ASSERT (input_rel_hdr->sh_entsize
+ == sizeof (Elf_External_Rela));
+ erela = ((Elf_External_Rela *) output_rel_hdr->contents
+ + o->output_section->reloc_count);
+ for (; irela < irelaend; irela++, erela++)
+ elf_swap_reloca_out (output_bfd, irela, erela);
+ }
+
+ o->output_section->reloc_count += o->reloc_count;
+ }
+ }
+
+ /* Write out the modified section contents. */
+ if (! bfd_set_section_contents (output_bfd, o->output_section,
+ finfo->contents, o->output_offset,
+ (o->_cooked_size != 0
+ ? o->_cooked_size
+ : o->_raw_size)))
+ return false;
+ }
+
+ return true;
+}
+
+/* Generate a reloc when linking an ELF file. This is a reloc
+ requested by the linker, and does come from any input file. This
+ is used to build constructor and destructor tables when linking
+ with -Ur. */
+
+static boolean
+elf_reloc_link_order (output_bfd, info, output_section, link_order)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ asection *output_section;
+ struct bfd_link_order *link_order;
+{
+ reloc_howto_type *howto;
+ long indx;
+ bfd_vma offset;
+ struct elf_link_hash_entry **rel_hash_ptr;
+ Elf_Internal_Shdr *rel_hdr;
+
+ howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
+ if (howto == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ /* If this is an inplace reloc, we must write the addend into the
+ object file. */
+ if (howto->partial_inplace
+ && link_order->u.reloc.p->addend != 0)
+ {
+ bfd_size_type size;
+ bfd_reloc_status_type rstat;
+ bfd_byte *buf;
+ boolean ok;
+
+ size = bfd_get_reloc_size (howto);
+ buf = (bfd_byte *) bfd_zmalloc (size);
+ if (buf == (bfd_byte *) NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ rstat = _bfd_relocate_contents (howto, output_bfd,
+ link_order->u.reloc.p->addend, buf);
+ switch (rstat)
+ {
+ case bfd_reloc_ok:
+ break;
+ default:
+ case bfd_reloc_outofrange:
+ abort ();
+ case bfd_reloc_overflow:
+ if (! ((*info->callbacks->reloc_overflow)
+ (info,
+ (link_order->type == bfd_section_reloc_link_order
+ ? bfd_section_name (output_bfd,
+ link_order->u.reloc.p->u.section)
+ : link_order->u.reloc.p->u.name),
+ howto->name, link_order->u.reloc.p->addend,
+ (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
+ {
+ free (buf);
+ return false;
+ }
+ break;
+ }
+ ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
+ (file_ptr) link_order->offset, size);
+ free (buf);
+ if (! ok)
+ return false;
+ }
+
+ /* Figure out the symbol index. */
+ rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
+ + output_section->reloc_count);
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ indx = link_order->u.reloc.p->u.section->target_index;
+ BFD_ASSERT (indx != 0);
+ *rel_hash_ptr = NULL;
+ }
+ else
+ {
+ struct elf_link_hash_entry *h;
+
+ h = elf_link_hash_lookup (elf_hash_table (info),
+ link_order->u.reloc.p->u.name,
+ false, false, true);
+ if (h != NULL)
+ {
+ /* Setting the index to -2 tells elf_link_output_extsym that
+ this symbol is used by a reloc. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
+ indx = 0;
+ }
+ else
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
+ (asection *) NULL, (bfd_vma) 0)))
+ return false;
+ indx = 0;
+ }
+ }
+
+ /* The address of a reloc is relative to the section in a
+ relocateable file, and is a virtual address in an executable
+ file. */
+ offset = link_order->offset;
+ if (! info->relocateable)
+ offset += output_section->vma;
+
+ rel_hdr = &elf_section_data (output_section)->rel_hdr;
+
+ if (rel_hdr->sh_type == SHT_REL)
+ {
+ Elf_Internal_Rel irel;
+ Elf_External_Rel *erel;
+
+ irel.r_offset = offset;
+ irel.r_info = ELF_R_INFO (indx, howto->type);
+ erel = ((Elf_External_Rel *) rel_hdr->contents
+ + output_section->reloc_count);
+ elf_swap_reloc_out (output_bfd, &irel, erel);
+ }
+ else
+ {
+ Elf_Internal_Rela irela;
+ Elf_External_Rela *erela;
+
+ irela.r_offset = offset;
+ irela.r_info = ELF_R_INFO (indx, howto->type);
+ irela.r_addend = link_order->u.reloc.p->addend;
+ erela = ((Elf_External_Rela *) rel_hdr->contents
+ + output_section->reloc_count);
+ elf_swap_reloca_out (output_bfd, &irela, erela);
+ }
+
+ ++output_section->reloc_count;
+
+ return true;
+}
+
#define bfd_elfNN_get_section_contents _bfd_generic_get_section_contents
#endif
+#define bfd_elfNN_canonicalize_dynamic_symtab _bfd_elf_canonicalize_dynamic_symtab
+#define bfd_elfNN_canonicalize_reloc _bfd_elf_canonicalize_reloc
+#ifndef bfd_elfNN_find_nearest_line
+#define bfd_elfNN_find_nearest_line _bfd_elf_find_nearest_line
+#endif
+#define bfd_elfNN_get_dynamic_symtab_upper_bound _bfd_elf_get_dynamic_symtab_upper_bound
+#define bfd_elfNN_get_lineno _bfd_elf_get_lineno
+#define bfd_elfNN_get_reloc_upper_bound _bfd_elf_get_reloc_upper_bound
+#define bfd_elfNN_get_symbol_info _bfd_elf_get_symbol_info
+#define bfd_elfNN_get_symtab _bfd_elf_get_symtab
+#define bfd_elfNN_get_symtab_upper_bound _bfd_elf_get_symtab_upper_bound
+#if 0 /* done in libelf.h */
+#define bfd_elfNN_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
+#endif
+#define bfd_elfNN_make_empty_symbol _bfd_elf_make_empty_symbol
+#define bfd_elfNN_new_section_hook _bfd_elf_new_section_hook
+#define bfd_elfNN_set_arch_mach _bfd_elf_set_arch_mach
+#ifndef bfd_elfNN_set_section_contents
+#define bfd_elfNN_set_section_contents _bfd_elf_set_section_contents
+#endif
+#define bfd_elfNN_sizeof_headers _bfd_elf_sizeof_headers
+#define bfd_elfNN_write_object_contents _bfd_elf_write_object_contents
+
+#ifndef elf_backend_want_got_plt
+#define elf_backend_want_got_plt 0
+#endif
+#ifndef elf_backend_plt_readonly
+#define elf_backend_plt_readonly 0
+#endif
+#ifndef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym 0
+#endif
+
#define bfd_elfNN_bfd_debug_info_start bfd_void
#define bfd_elfNN_bfd_debug_info_end bfd_void
#define bfd_elfNN_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
#define ELF_MACHINE_ALT2 0
#endif
+extern const struct elf_size_info _bfd_elfNN_size_info;
+
static CONST struct elf_backend_data elfNN_bed =
{
#ifdef USE_REL
elf_backend_final_write_processing,
elf_backend_ecoff_debug_swap,
ELF_MACHINE_ALT1,
- ELF_MACHINE_ALT2
+ ELF_MACHINE_ALT2,
+ &_bfd_elfNN_size_info,
+ elf_backend_want_got_plt,
+ elf_backend_plt_readonly,
+ elf_backend_want_plt_sym,
};
#ifdef TARGET_BIG_SYM
\f
/* Constant information held for an ELF backend. */
+struct elf_size_info {
+ unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
+ unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
+
+ unsigned char arch_size, file_align;
+ unsigned char elfclass, ev_current;
+ int (*write_out_phdrs) PARAMS ((bfd *, Elf_Internal_Phdr *, int));
+ boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *));
+ void (*write_relocs) PARAMS ((bfd *, asection *, PTR));
+ void (*swap_symbol_out) PARAMS ((bfd *, Elf_Internal_Sym *, char *));
+ boolean (*slurp_reloc_table) PARAMS ((bfd *, asection *, asymbol **));
+ long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean));
+};
+
+#define elf_symbol_from(ABFD,S) \
+ (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
+ && (S)->the_bfd->tdata.elf_obj_data != 0) \
+ ? (elf_symbol_type *) (S) \
+ : 0)
+
struct elf_backend_data
{
/* Whether the backend uses REL or RELA relocations. FIXME: some
/* Alternate EM_xxxx machine codes for this backend. */
int elf_machine_alt1;
int elf_machine_alt2;
+
+ const struct elf_size_info *s;
+
+ unsigned char want_got_plt : 1;
+ unsigned char plt_readonly : 1;
+ unsigned char want_plt_sym : 1;
};
/* Information stored for each BFD section in an ELF file. This
#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
#define elf_ppc_flags_init(bfd) (elf_tdata(bfd) -> ppc_flags_init)
\f
-extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
-extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
+extern char * bfd_elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
+extern char * bfd_elf_get_str_section PARAMS ((bfd *, unsigned));
extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
bfd_print_symbol_type));
+#define elf_string_from_elf_strtab(abfd,strindex) \
+ bfd_elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
#define bfd_elf32_print_symbol bfd_elf_print_symbol
#define bfd_elf64_print_symbol bfd_elf_print_symbol
struct bfd_hash_table *,
const char *)));
-extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
-extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
-
-extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
-extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
-extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
-extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
-extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
- bfd *));
-extern boolean bfd_elf32_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
+extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *));
+extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
file_ptr,
bfd_size_type));
-
-extern long bfd_elf32_get_symtab_upper_bound PARAMS ((bfd *));
-extern long bfd_elf32_get_symtab PARAMS ((bfd *, asymbol **));
-extern long bfd_elf32_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
-extern long bfd_elf32_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
-extern long bfd_elf32_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
-extern long bfd_elf32_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
+extern long _bfd_elf_get_symtab_upper_bound PARAMS ((bfd *));
+extern long _bfd_elf_get_symtab PARAMS ((bfd *, asymbol **));
+extern long _bfd_elf_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
+extern long _bfd_elf_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
+extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
+extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
arelent **, asymbol **));
-extern asymbol *bfd_elf32_make_empty_symbol PARAMS ((bfd *));
-extern void bfd_elf32_get_symbol_info PARAMS ((bfd *, asymbol *,
+extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *));
+extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *,
symbol_info *));
-extern alent *bfd_elf32_get_lineno PARAMS ((bfd *, asymbol *));
-extern boolean bfd_elf32_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
+extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *));
+extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
unsigned long));
-extern boolean bfd_elf32_find_nearest_line PARAMS ((bfd *, asection *,
+extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *,
asymbol **,
bfd_vma, CONST char **,
CONST char **,
unsigned int *));
-extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
-extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
+extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean));
+extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *));
+
+/* If the target doesn't have reloc handling written yet: */
+extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *,
+ Elf_Internal_Rela *));
+
+asection *bfd_section_from_elf_index PARAMS ((bfd *, unsigned int));
+boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
+ struct bfd_link_info *));
+struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void));
+boolean
+_bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *,
+ struct elf_link_hash_entry *));
+boolean
+_bfd_elf_compute_section_file_positions PARAMS ((bfd *,
+ struct bfd_link_info *));
+void _bfd_elf_assign_file_positions_for_relocs PARAMS ((bfd *));
+file_ptr _bfd_elf_assign_file_position_for_section PARAMS ((Elf_Internal_Shdr *,
+ file_ptr,
+ boolean));
+
+boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
+ struct bfd_link_info *));
+boolean _bfd_elf_create_got_section PARAMS ((bfd *,
+ struct bfd_link_info *));
+
+extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
+extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
+extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
+extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
+extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
+ bfd *));
+
extern boolean bfd_elf32_bfd_link_add_symbols
PARAMS ((bfd *, struct bfd_link_info *));
extern boolean bfd_elf32_bfd_final_link
extern void bfd_elf32_swap_symbol_in
PARAMS ((bfd *, Elf32_External_Sym *, Elf_Internal_Sym *));
extern void bfd_elf32_swap_symbol_out
- PARAMS ((bfd *, Elf_Internal_Sym *, Elf32_External_Sym *));
+ PARAMS ((bfd *, Elf_Internal_Sym *, char *));
extern void bfd_elf32_swap_reloc_in
PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
extern void bfd_elf32_swap_reloc_out
PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
extern boolean bfd_elf32_link_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
-extern boolean bfd_elf32_link_record_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-
-/* If the target doesn't have reloc handling written yet: */
-extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
- Elf32_Internal_Rela *));
extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
bfd *));
-extern boolean bfd_elf64_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
- file_ptr,
- bfd_size_type));
-
-extern long bfd_elf64_get_symtab_upper_bound PARAMS ((bfd *));
-extern long bfd_elf64_get_symtab PARAMS ((bfd *, asymbol **));
-extern long bfd_elf64_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
-extern long bfd_elf64_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
-extern long bfd_elf64_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
-extern long bfd_elf64_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
- arelent **, asymbol **));
-extern asymbol *bfd_elf64_make_empty_symbol PARAMS ((bfd *));
-extern void bfd_elf64_get_symbol_info PARAMS ((bfd *, asymbol *,
- symbol_info *));
-extern alent *bfd_elf64_get_lineno PARAMS ((bfd *, asymbol *));
-extern boolean bfd_elf64_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
- unsigned long));
-extern boolean bfd_elf64_find_nearest_line PARAMS ((bfd *, asection *,
- asymbol **,
- bfd_vma, CONST char **,
- CONST char **,
- unsigned int *));
-extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
-extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
extern boolean bfd_elf64_bfd_link_add_symbols
PARAMS ((bfd *, struct bfd_link_info *));
extern boolean bfd_elf64_bfd_final_link
PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
extern boolean bfd_elf64_link_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
-extern boolean bfd_elf64_link_record_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-/* If the target doesn't have reloc handling written yet: */
-extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,
- Elf64_Internal_Rela *));
+#define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
+#define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
#endif /* _LIBELF_H_ */
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