/* X86-64 specific support for ELF
- Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010, 2011, 2012, 2013
- Free Software Foundation, Inc.
+ Copyright (C) 2000-2014 Free Software Foundation, Inc.
Contributed by Jan Hubicka <jh@suse.cz>.
This file is part of BFD, the Binary File Descriptor library.
return &ret->elf;
}
+/* Destroy an X86-64 ELF linker hash table. */
+
+static void
+elf_x86_64_link_hash_table_free (bfd *obfd)
+{
+ struct elf_x86_64_link_hash_table *htab
+ = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
+
+ if (htab->loc_hash_table)
+ htab_delete (htab->loc_hash_table);
+ if (htab->loc_hash_memory)
+ objalloc_free ((struct objalloc *) htab->loc_hash_memory);
+ _bfd_elf_link_hash_table_free (obfd);
+}
+
/* Create an X86-64 ELF linker hash table. */
static struct bfd_link_hash_table *
ret->loc_hash_memory = objalloc_create ();
if (!ret->loc_hash_table || !ret->loc_hash_memory)
{
- free (ret);
+ elf_x86_64_link_hash_table_free (abfd);
return NULL;
}
+ ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
return &ret->elf.root;
}
-/* Destroy an X86-64 ELF linker hash table. */
-
-static void
-elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
-{
- struct elf_x86_64_link_hash_table *htab
- = (struct elf_x86_64_link_hash_table *) hash;
-
- if (htab->loc_hash_table)
- htab_delete (htab->loc_hash_table);
- if (htab->loc_hash_memory)
- objalloc_free ((struct objalloc *) htab->loc_hash_memory);
- _bfd_elf_link_hash_table_free (hash);
-}
-
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
.rela.bss sections in DYNOBJ, and set up shortcuts to them in our
hash table. */
case R_X86_64_PC32_BND:
case R_X86_64_PLT32_BND:
+ case R_X86_64_PC32:
+ case R_X86_64_PLT32:
+ case R_X86_64_32:
+ case R_X86_64_64:
/* MPX PLT is supported only if elf_x86_64_arch_bed
is used in 64-bit mode. */
if (ABI_64_P (abfd)
- && (get_elf_x86_64_backend_data (abfd)
- == &elf_x86_64_arch_bed))
+ && info->bndplt
+ && (get_elf_x86_64_backend_data (abfd)
+ == &elf_x86_64_arch_bed))
{
elf_x86_64_hash_entry (h)->has_bnd_reloc = TRUE;
}
case R_X86_64_32S:
- case R_X86_64_32:
- case R_X86_64_64:
- case R_X86_64_PC32:
case R_X86_64_PC64:
- case R_X86_64_PLT32:
case R_X86_64_GOTPCREL:
case R_X86_64_GOTPCREL64:
if (htab->elf.dynobj == NULL)
/* Nothing to do if there are no codes, no relocations or no output. */
if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
|| sec->reloc_count == 0
- || discarded_section (sec))
+ || bfd_is_abs_section (sec->output_section))
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
/* Set up .got offsets for local syms, and space for local dynamic
relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
{
/* IE->LE transition:
- Originally it can be one of:
+ For 64bit, originally it can be one of:
movq foo@gottpoff(%rip), %reg
addq foo@gottpoff(%rip), %reg
We change it into:
movq $foo, %reg
leaq foo(%reg), %reg
- addq $foo, %reg. */
+ addq $foo, %reg.
+ For 32bit, originally it can be one of:
+ movq foo@gottpoff(%rip), %reg
+ addl foo@gottpoff(%rip), %reg
+ We change it into:
+ movq $foo, %reg
+ leal foo(%reg), %reg
+ addl $foo, %reg. */
unsigned int val, type, reg;
- val = bfd_get_8 (input_bfd, contents + roff - 3);
+ if (roff >= 3)
+ val = bfd_get_8 (input_bfd, contents + roff - 3);
+ else
+ val = 0;
type = bfd_get_8 (input_bfd, contents + roff - 2);
reg = bfd_get_8 (input_bfd, contents + roff - 1);
reg >>= 3;
}
else if (reg == 4)
{
- /* addq -> addq - addressing with %rsp/%r12 is
- special */
+ /* addq/addl -> addq/addl - addressing with %rsp/%r12
+ is special */
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x49,
contents + roff - 3);
}
else
{
- /* addq -> leaq */
+ /* addq/addl -> leaq/leal */
if (val == 0x4c)
bfd_put_8 (output_bfd, 0x4d,
contents + roff - 3);
return TRUE;
}
-/* Return address for Ith PLT stub in section PLT, for relocation REL
- or (bfd_vma) -1 if it should not be included. */
+/* Return address in section PLT for the Ith GOTPLT relocation, for
+ relocation REL or (bfd_vma) -1 if it should not be included. */
static bfd_vma
elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
- const arelent *rel ATTRIBUTE_UNUSED)
+ const arelent *rel)
{
- return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
+ bfd *abfd;
+ const struct elf_x86_64_backend_data *bed;
+ bfd_vma plt_offset;
+
+ /* Only match R_X86_64_JUMP_SLOT and R_X86_64_IRELATIVE. */
+ if (rel->howto->type != R_X86_64_JUMP_SLOT
+ && rel->howto->type != R_X86_64_IRELATIVE)
+ return (bfd_vma) -1;
+
+ abfd = plt->owner;
+ bed = get_elf_x86_64_backend_data (abfd);
+ plt_offset = bed->plt_entry_size;
+
+ if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU)
+ return plt->vma + (i + 1) * plt_offset;
+
+ while (plt_offset < plt->size)
+ {
+ bfd_vma reloc_index;
+ bfd_byte reloc_index_raw[4];
+
+ if (!bfd_get_section_contents (abfd, (asection *) plt,
+ reloc_index_raw,
+ plt_offset + bed->plt_reloc_offset,
+ sizeof (reloc_index_raw)))
+ return (bfd_vma) -1;
+
+ reloc_index = H_GET_32 (abfd, reloc_index_raw);
+ if (reloc_index == i)
+ return plt->vma + plt_offset;
+ plt_offset += bed->plt_entry_size;
+ }
+
+ abort ();
+}
+
+/* Return offset in .plt.bnd section for the Ith GOTPLT relocation with
+ PLT section, or (bfd_vma) -1 if it should not be included. */
+
+static bfd_vma
+elf_x86_64_plt_sym_val_offset_plt_bnd (bfd_vma i, const asection *plt)
+{
+ const struct elf_x86_64_backend_data *bed = &elf_x86_64_bnd_arch_bed;
+ bfd *abfd = plt->owner;
+ bfd_vma plt_offset = bed->plt_entry_size;
+
+ if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_GNU)
+ return i * sizeof (elf_x86_64_legacy_plt2_entry);
+
+ while (plt_offset < plt->size)
+ {
+ bfd_vma reloc_index;
+ bfd_byte reloc_index_raw[4];
+
+ if (!bfd_get_section_contents (abfd, (asection *) plt,
+ reloc_index_raw,
+ plt_offset + bed->plt_reloc_offset,
+ sizeof (reloc_index_raw)))
+ return (bfd_vma) -1;
+
+ reloc_index = H_GET_32 (abfd, reloc_index_raw);
+ if (reloc_index == i)
+ {
+ /* This is the index in .plt section. */
+ long plt_index = plt_offset / bed->plt_entry_size;
+ /* Return the offset in .plt.bnd section. */
+ return (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry);
+ }
+ plt_offset += bed->plt_entry_size;
+ }
+
+ abort ();
}
/* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
size_t size;
Elf_Internal_Shdr *hdr;
char *names;
- asection *plt;
- bfd_vma addr;
+ asection *plt, *plt_push;
+
+ plt_push = bfd_get_section_by_name (abfd, ".plt");
+ if (plt_push == NULL)
+ return 0;
plt = bfd_get_section_by_name (abfd, ".plt.bnd");
/* Use the generic ELF version if there is no .plt.bnd section. */
names = (char *) (s + count);
p = relplt->relocation;
n = 0;
- addr = 0;
for (i = 0; i < count; i++, p++)
{
+ bfd_vma offset;
size_t len;
+ if (p->howto->type != R_X86_64_JUMP_SLOT
+ && p->howto->type != R_X86_64_IRELATIVE)
+ continue;
+
+ offset = elf_x86_64_plt_sym_val_offset_plt_bnd (i, plt_push);
+
*s = **p->sym_ptr_ptr;
/* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
we are defining a symbol, ensure one of them is set. */
s->flags |= BSF_GLOBAL;
s->flags |= BSF_SYNTHETIC;
s->section = plt;
- s->value = addr;
+ s->value = offset;
s->name = names;
s->udata.p = NULL;
len = strlen ((*p->sym_ptr_ptr)->name);
memcpy (names, "@plt", sizeof ("@plt"));
names += sizeof ("@plt");
++s, ++n;
- addr += sizeof (elf_x86_64_legacy_plt2_entry);
}
return n;
return TRUE;
}
- if ((abfd->flags & DYNAMIC) == 0
- && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
- || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
+ if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
+ || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
+ && (abfd->flags & DYNAMIC) == 0
+ && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
return TRUE;
{ NULL, 0, 0, 0, 0 }
};
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_vec
#define TARGET_LITTLE_NAME "elf64-x86-64"
#define ELF_ARCH bfd_arch_i386
#define ELF_TARGET_ID X86_64_ELF_DATA
#define bfd_elf64_bfd_link_hash_table_create \
elf_x86_64_link_hash_table_create
-#define bfd_elf64_bfd_link_hash_table_free \
- elf_x86_64_link_hash_table_free
#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
#define bfd_elf64_bfd_reloc_name_lookup \
elf_x86_64_reloc_name_lookup
/* FreeBSD support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
/* Solaris 2 support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
+#define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
#undef elf64_bed
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
+#define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
#undef elf32_bed
#define bfd_elf32_bfd_link_hash_table_create \
elf_x86_64_link_hash_table_create
-#define bfd_elf32_bfd_link_hash_table_free \
- elf_x86_64_link_hash_table_free
#define bfd_elf32_bfd_reloc_type_lookup \
elf_x86_64_reloc_type_lookup
#define bfd_elf32_bfd_reloc_name_lookup \
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
+#define TARGET_LITTLE_SYM l1om_elf64_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-l1om"
#undef ELF_ARCH
/* FreeBSD L1OM support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
+#define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
}
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
+#define TARGET_LITTLE_SYM k1om_elf64_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-k1om"
#undef ELF_ARCH
/* FreeBSD K1OM support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
+#define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
/* 32bit x86-64 support. */
#undef TARGET_LITTLE_SYM
-#define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
+#define TARGET_LITTLE_SYM x86_64_elf32_vec
#undef TARGET_LITTLE_NAME
#define TARGET_LITTLE_NAME "elf32-x86-64"
#undef elf32_bed
projects / platform / upstream / binutils.git / blobdiff