/* POWER/PowerPC XCOFF linker support.
- Copyright 1995 Free Software Foundation, Inc.
+ Copyright 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
Written by Ian Lance Taylor <ian@cygnus.com>, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
#include "coff/internal.h"
#include "libcoff.h"
-/* This file holds the XCOFF linker code. A lot of it is very similar
- to the COFF linker code. However, it is different enough that I
- chose to avoid trying to hack up the COFF code to support XCOFF.
- That leads to a certain amount of duplicated code, alas. */
+/* This file holds the XCOFF linker code. */
#define STRING_SIZE_SIZE (4)
+/* In order to support linking different object file formats into an
+ XCOFF format, we need to be able to determine whether a particular
+ bfd_target is an XCOFF vector. FIXME: We need to rethink this
+ whole approach. */
+#define XCOFF_XVECP(xv) \
+ (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \
+ || strcmp ((xv)->name, "xcoff-powermac") == 0)
+
/* Get the XCOFF hash table entries for a BFD. */
#define obj_xcoff_sym_hashes(bfd) \
((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
+/* XCOFF relocation types. These probably belong in a header file
+ somewhere. The relocations are described in the function
+ _bfd_ppc_xcoff_relocate_section in this file. */
+
+#define R_POS (0x00)
+#define R_NEG (0x01)
+#define R_REL (0x02)
+#define R_TOC (0x03)
+#define R_RTB (0x04)
+#define R_GL (0x05)
+#define R_TCL (0x06)
+#define R_BA (0x08)
+#define R_BR (0x0a)
+#define R_RL (0x0c)
+#define R_RLA (0x0d)
+#define R_REF (0x0f)
+#define R_TRL (0x12)
+#define R_TRLA (0x13)
+#define R_RRTBI (0x14)
+#define R_RRTBA (0x15)
+#define R_CAI (0x16)
+#define R_CREL (0x17)
+#define R_RBA (0x18)
+#define R_RBAC (0x19)
+#define R_RBR (0x1a)
+#define R_RBRC (0x1b)
+
+/* The first word of global linkage code. This must be modified by
+ filling in the correct TOC offset. */
+
+#define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
+
+/* The remaining words of global linkage code. */
+
+static unsigned long xcoff_glink_code[] =
+{
+ 0x90410014, /* stw r2,20(r1) */
+ 0x800c0000, /* lwz r0,0(r12) */
+ 0x804c0004, /* lwz r2,4(r12) */
+ 0x7c0903a6, /* mtctr r0 */
+ 0x4e800420, /* bctr */
+ 0x0, /* start of traceback table */
+ 0x000c8000, /* traceback table */
+ 0x0 /* traceback table */
+};
+
+#define XCOFF_GLINK_SIZE \
+ (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
+
+/* We reuse the SEC_ROM flag as a mark flag for garbage collection.
+ This flag will only be used on input sections. */
+
+#define SEC_MARK (SEC_ROM)
+
+/* The ldhdr structure. This appears at the start of the .loader
+ section. */
+
+struct internal_ldhdr
+{
+ /* The version number: currently always 1. */
+ unsigned long l_version;
+ /* The number of symbol table entries. */
+ bfd_size_type l_nsyms;
+ /* The number of relocation table entries. */
+ bfd_size_type l_nreloc;
+ /* The length of the import file string table. */
+ bfd_size_type l_istlen;
+ /* The number of import files. */
+ bfd_size_type l_nimpid;
+ /* The offset from the start of the .loader section to the first
+ entry in the import file table. */
+ bfd_size_type l_impoff;
+ /* The length of the string table. */
+ bfd_size_type l_stlen;
+ /* The offset from the start of the .loader section to the first
+ entry in the string table. */
+ bfd_size_type l_stoff;
+};
+
+struct external_ldhdr
+{
+ bfd_byte l_version[4];
+ bfd_byte l_nsyms[4];
+ bfd_byte l_nreloc[4];
+ bfd_byte l_istlen[4];
+ bfd_byte l_nimpid[4];
+ bfd_byte l_impoff[4];
+ bfd_byte l_stlen[4];
+ bfd_byte l_stoff[4];
+};
+
+#define LDHDRSZ (8 * 4)
+
+/* The ldsym structure. This is used to represent a symbol in the
+ .loader section. */
+
+struct internal_ldsym
+{
+ union
+ {
+ /* The symbol name if <= SYMNMLEN characters. */
+ char _l_name[SYMNMLEN];
+ struct
+ {
+ /* Zero if the symbol name is more than SYMNMLEN characters. */
+ long _l_zeroes;
+ /* The offset in the string table if the symbol name is more
+ than SYMNMLEN characters. */
+ long _l_offset;
+ } _l_l;
+ } _l;
+ /* The symbol value. */
+ bfd_vma l_value;
+ /* The symbol section number. */
+ short l_scnum;
+ /* The symbol type and flags. */
+ char l_smtype;
+ /* The symbol storage class. */
+ char l_smclas;
+ /* The import file ID. */
+ bfd_size_type l_ifile;
+ /* Offset to the parameter type check string. */
+ bfd_size_type l_parm;
+};
+
+struct external_ldsym
+{
+ union
+ {
+ bfd_byte _l_name[SYMNMLEN];
+ struct
+ {
+ bfd_byte _l_zeroes[4];
+ bfd_byte _l_offset[4];
+ } _l_l;
+ } _l;
+ bfd_byte l_value[4];
+ bfd_byte l_scnum[2];
+ bfd_byte l_smtype[1];
+ bfd_byte l_smclas[1];
+ bfd_byte l_ifile[4];
+ bfd_byte l_parm[4];
+};
+
+#define LDSYMSZ (8 + 3 * 4 + 2 + 2)
+
+/* These flags are for the l_smtype field (the lower three bits are an
+ XTY_* value). */
+
+/* Imported symbol. */
+#define L_IMPORT (0x40)
+/* Entry point. */
+#define L_ENTRY (0x20)
+/* Exported symbol. */
+#define L_EXPORT (0x10)
+
+/* The ldrel structure. This is used to represent a reloc in the
+ .loader section. */
+
+struct internal_ldrel
+{
+ /* The reloc address. */
+ bfd_vma l_vaddr;
+ /* The symbol table index in the .loader section symbol table. */
+ bfd_size_type l_symndx;
+ /* The relocation type and size. */
+ short l_rtype;
+ /* The section number this relocation applies to. */
+ short l_rsecnm;
+};
+
+struct external_ldrel
+{
+ bfd_byte l_vaddr[4];
+ bfd_byte l_symndx[4];
+ bfd_byte l_rtype[2];
+ bfd_byte l_rsecnm[2];
+};
+
+#define LDRELSZ (2 * 4 + 2 * 2)
+
+/* The list of import files. */
+
+struct xcoff_import_file
+{
+ /* The next entry in the list. */
+ struct xcoff_import_file *next;
+ /* The path. */
+ const char *path;
+ /* The file name. */
+ const char *file;
+ /* The member name. */
+ const char *member;
+};
+
/* An entry in the XCOFF linker hash table. */
struct xcoff_link_hash_entry
{
struct bfd_link_hash_entry root;
- /* Whether this symbol came from an XCOFF input file. */
- boolean xcoff;
-
/* Symbol index in output file. Set to -1 initially. Set to -2 if
there is a reloc against this symbol. */
long indx;
- /* Whether we have created a TOC entry for this symbol. */
- boolean toc;
+ /* If we have created a TOC entry for this symbol, this is the .tc
+ section which holds it. */
+ asection *toc_section;
+
+ union
+ {
+ /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
+ set), this is the offset in toc_section. */
+ bfd_vma toc_offset;
+ /* If the TOC entry comes from an input file, this is set to the
+ symbol index of the C_HIDEXT XMC_TC or XMC_TD symbol. */
+ long toc_indx;
+ } u;
+
+ /* If this symbol is a function entry point which is called, this
+ field holds a pointer to the function descriptor. If this symbol
+ is a function descriptor, this field holds a pointer to the
+ function entry point. */
+ struct xcoff_link_hash_entry *descriptor;
+
+ /* The .loader symbol table entry, if there is one. */
+ struct internal_ldsym *ldsym;
+
+ /* If XCOFF_BUILT_LDSYM is set, this is the .loader symbol table
+ index. If XCOFF_BUILD_LDSYM is clear, and XCOFF_IMPORT is set,
+ this is the l_ifile value. */
+ long ldindx;
+
+ /* Some linker flags. */
+ unsigned short flags;
+ /* Symbol is referenced by a regular object. */
+#define XCOFF_REF_REGULAR (01)
+ /* Symbol is defined by a regular object. */
+#define XCOFF_DEF_REGULAR (02)
+ /* Symbol is defined by a dynamic object. */
+#define XCOFF_DEF_DYNAMIC (04)
+ /* Symbol is used in a reloc being copied into the .loader section. */
+#define XCOFF_LDREL (010)
+ /* Symbol is the entry point. */
+#define XCOFF_ENTRY (020)
+ /* Symbol is called; this is, it appears in a R_BR reloc. */
+#define XCOFF_CALLED (040)
+ /* Symbol needs the TOC entry filled in. */
+#define XCOFF_SET_TOC (0100)
+ /* Symbol is explicitly imported. */
+#define XCOFF_IMPORT (0200)
+ /* Symbol is explicitly exported. */
+#define XCOFF_EXPORT (0400)
+ /* Symbol has been processed by xcoff_build_ldsyms. */
+#define XCOFF_BUILT_LDSYM (01000)
+ /* Symbol is mentioned by a section which was not garbage collected. */
+#define XCOFF_MARK (02000)
+ /* Symbol size is recorded in size_list list from hash table. */
+#define XCOFF_HAS_SIZE (04000)
+ /* Symbol is a function descriptor. */
+#define XCOFF_DESCRIPTOR (010000)
+ /* Multiple definitions have been for the symbol. */
+#define XCOFF_MULTIPLY_DEFINED (020000)
+
+ /* The storage mapping class. */
+ unsigned char smclas;
};
/* The XCOFF linker hash table. */
/* The .debug section we will use for the final output. */
asection *debug_section;
+
+ /* The .loader section we will use for the final output. */
+ asection *loader_section;
+
+ /* A count of non TOC relative relocs which will need to be
+ allocated in the .loader section. */
+ size_t ldrel_count;
+
+ /* The .loader section header. */
+ struct internal_ldhdr ldhdr;
+
+ /* The .gl section we use to hold global linkage code. */
+ asection *linkage_section;
+
+ /* The .tc section we use to hold toc entries we build for global
+ linkage code. */
+ asection *toc_section;
+
+ /* The .ds section we use to hold function descriptors which we
+ create for exported symbols. */
+ asection *descriptor_section;
+
+ /* The list of import files. */
+ struct xcoff_import_file *imports;
+
+ /* Required alignment of sections within the output file. */
+ unsigned long file_align;
+
+ /* Whether the .text section must be read-only. */
+ boolean textro;
+
+ /* Whether garbage collection was done. */
+ boolean gc;
+
+ /* A linked list of symbols for which we have size information. */
+ struct xcoff_link_size_list
+ {
+ struct xcoff_link_size_list *next;
+ struct xcoff_link_hash_entry *h;
+ bfd_size_type size;
+ } *size_list;
+
+ /* Magic sections: _text, _etext, _data, _edata, _end, end. */
+ asection *special_sections[6];
};
-/* Information we keep for each section in the output file. */
+/* Information we keep for each section in the output file during the
+ final link phase. */
struct xcoff_link_section_info
{
/* For each reloc against a global symbol whose index was not known
when the reloc was handled, the global hash table entry. */
struct xcoff_link_hash_entry **rel_hashes;
+ /* If there is a TOC relative reloc against a global symbol, and the
+ index of the TOC symbol is not known when the reloc was handled,
+ an entry is added to this linked list. This is not an array,
+ like rel_hashes, because this case is quite uncommon. */
+ struct xcoff_toc_rel_hash
+ {
+ struct xcoff_toc_rel_hash *next;
+ struct xcoff_link_hash_entry *h;
+ struct internal_reloc *rel;
+ } *toc_rel_hashes;
};
/* Information that we pass around while doing the final link step. */
struct internal_syment last_file;
/* Symbol index of TOC symbol. */
long toc_symindx;
+ /* Start of .loader symbols. */
+ struct external_ldsym *ldsym;
+ /* Next .loader reloc to swap out. */
+ struct external_ldrel *ldrel;
+ /* File position of start of line numbers. */
+ file_ptr line_filepos;
/* Buffer large enough to hold swapped symbols of any input file. */
struct internal_syment *internal_syms;
/* Buffer large enough to hold output indices of symbols of any
bfd_byte *external_relocs;
};
+static void xcoff_swap_ldhdr_in
+ PARAMS ((bfd *, const struct external_ldhdr *, struct internal_ldhdr *));
+static void xcoff_swap_ldhdr_out
+ PARAMS ((bfd *, const struct internal_ldhdr *, struct external_ldhdr *));
+static void xcoff_swap_ldsym_in
+ PARAMS ((bfd *, const struct external_ldsym *, struct internal_ldsym *));
+static void xcoff_swap_ldsym_out
+ PARAMS ((bfd *, const struct internal_ldsym *, struct external_ldsym *));
+static void xcoff_swap_ldrel_in
+ PARAMS ((bfd *, const struct external_ldrel *, struct internal_ldrel *));
+static void xcoff_swap_ldrel_out
+ PARAMS ((bfd *, const struct internal_ldrel *, struct external_ldrel *));
static struct bfd_hash_entry *xcoff_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
+static boolean xcoff_get_section_contents PARAMS ((bfd *, asection *));
+static struct internal_reloc *xcoff_read_internal_relocs
+ PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
+ struct internal_reloc *));
static boolean xcoff_link_add_object_symbols
PARAMS ((bfd *, struct bfd_link_info *));
static boolean xcoff_link_check_archive_element
PARAMS ((bfd *, struct bfd_link_info *, boolean *));
static boolean xcoff_link_check_ar_symbols
PARAMS ((bfd *, struct bfd_link_info *, boolean *));
+static boolean xcoff_link_check_dynamic_ar_symbols
+ PARAMS ((bfd *, struct bfd_link_info *, boolean *));
+static bfd_size_type xcoff_find_reloc
+ PARAMS ((struct internal_reloc *, bfd_size_type, bfd_vma));
static boolean xcoff_link_add_symbols PARAMS ((bfd *, struct bfd_link_info *));
+static boolean xcoff_link_add_dynamic_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean xcoff_mark_symbol
+ PARAMS ((struct bfd_link_info *, struct xcoff_link_hash_entry *));
+static boolean xcoff_mark PARAMS ((struct bfd_link_info *, asection *));
+static void xcoff_sweep PARAMS ((struct bfd_link_info *));
+static boolean xcoff_build_ldsyms
+ PARAMS ((struct xcoff_link_hash_entry *, PTR));
static boolean xcoff_link_input_bfd
PARAMS ((struct xcoff_final_link_info *, bfd *));
static boolean xcoff_write_global_symbol
PARAMS ((bfd *, struct xcoff_final_link_info *, asection *,
struct bfd_link_order *));
static int xcoff_sort_relocs PARAMS ((const PTR, const PTR));
+\f
+/* Routines to swap information in the XCOFF .loader section. If we
+ ever need to write an XCOFF loader, this stuff will need to be
+ moved to another file shared by the linker (which XCOFF calls the
+ ``binder'') and the loader. */
+
+/* Swap in the ldhdr structure. */
+
+static void
+xcoff_swap_ldhdr_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldhdr *src;
+ struct internal_ldhdr *dst;
+{
+ dst->l_version = bfd_get_32 (abfd, src->l_version);
+ dst->l_nsyms = bfd_get_32 (abfd, src->l_nsyms);
+ dst->l_nreloc = bfd_get_32 (abfd, src->l_nreloc);
+ dst->l_istlen = bfd_get_32 (abfd, src->l_istlen);
+ dst->l_nimpid = bfd_get_32 (abfd, src->l_nimpid);
+ dst->l_impoff = bfd_get_32 (abfd, src->l_impoff);
+ dst->l_stlen = bfd_get_32 (abfd, src->l_stlen);
+ dst->l_stoff = bfd_get_32 (abfd, src->l_stoff);
+}
+
+/* Swap out the ldhdr structure. */
+
+static void
+xcoff_swap_ldhdr_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldhdr *src;
+ struct external_ldhdr *dst;
+{
+ bfd_put_32 (abfd, src->l_version, dst->l_version);
+ bfd_put_32 (abfd, src->l_nsyms, dst->l_nsyms);
+ bfd_put_32 (abfd, src->l_nreloc, dst->l_nreloc);
+ bfd_put_32 (abfd, src->l_istlen, dst->l_istlen);
+ bfd_put_32 (abfd, src->l_nimpid, dst->l_nimpid);
+ bfd_put_32 (abfd, src->l_impoff, dst->l_impoff);
+ bfd_put_32 (abfd, src->l_stlen, dst->l_stlen);
+ bfd_put_32 (abfd, src->l_stoff, dst->l_stoff);
+}
+
+/* Swap in the ldsym structure. */
+
+static void
+xcoff_swap_ldsym_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldsym *src;
+ struct internal_ldsym *dst;
+{
+ if (bfd_get_32 (abfd, src->_l._l_l._l_zeroes) != 0)
+ memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
+ else
+ {
+ dst->_l._l_l._l_zeroes = 0;
+ dst->_l._l_l._l_offset = bfd_get_32 (abfd, src->_l._l_l._l_offset);
+ }
+ dst->l_value = bfd_get_32 (abfd, src->l_value);
+ dst->l_scnum = bfd_get_16 (abfd, src->l_scnum);
+ dst->l_smtype = bfd_get_8 (abfd, src->l_smtype);
+ dst->l_smclas = bfd_get_8 (abfd, src->l_smclas);
+ dst->l_ifile = bfd_get_32 (abfd, src->l_ifile);
+ dst->l_parm = bfd_get_32 (abfd, src->l_parm);
+}
+
+/* Swap out the ldsym structure. */
+
+static void
+xcoff_swap_ldsym_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldsym *src;
+ struct external_ldsym *dst;
+{
+ if (src->_l._l_l._l_zeroes != 0)
+ memcpy (dst->_l._l_name, src->_l._l_name, SYMNMLEN);
+ else
+ {
+ bfd_put_32 (abfd, 0, dst->_l._l_l._l_zeroes);
+ bfd_put_32 (abfd, src->_l._l_l._l_offset, dst->_l._l_l._l_offset);
+ }
+ bfd_put_32 (abfd, src->l_value, dst->l_value);
+ bfd_put_16 (abfd, src->l_scnum, dst->l_scnum);
+ bfd_put_8 (abfd, src->l_smtype, dst->l_smtype);
+ bfd_put_8 (abfd, src->l_smclas, dst->l_smclas);
+ bfd_put_32 (abfd, src->l_ifile, dst->l_ifile);
+ bfd_put_32 (abfd, src->l_parm, dst->l_parm);
+}
+
+/* Swap in the ldrel structure. */
+
+static void
+xcoff_swap_ldrel_in (abfd, src, dst)
+ bfd *abfd;
+ const struct external_ldrel *src;
+ struct internal_ldrel *dst;
+{
+ dst->l_vaddr = bfd_get_32 (abfd, src->l_vaddr);
+ dst->l_symndx = bfd_get_32 (abfd, src->l_symndx);
+ dst->l_rtype = bfd_get_16 (abfd, src->l_rtype);
+ dst->l_rsecnm = bfd_get_16 (abfd, src->l_rsecnm);
+}
+
+/* Swap out the ldrel structure. */
+
+static void
+xcoff_swap_ldrel_out (abfd, src, dst)
+ bfd *abfd;
+ const struct internal_ldrel *src;
+ struct external_ldrel *dst;
+{
+ bfd_put_32 (abfd, src->l_vaddr, dst->l_vaddr);
+ bfd_put_32 (abfd, src->l_symndx, dst->l_symndx);
+ bfd_put_16 (abfd, src->l_rtype, dst->l_rtype);
+ bfd_put_16 (abfd, src->l_rsecnm, dst->l_rsecnm);
+}
+\f
+/* Routines to read XCOFF dynamic information. This don't really
+ belong here, but we already have the ldsym manipulation routines
+ here. */
+
+/* Read the contents of a section. */
+
+static boolean
+xcoff_get_section_contents (abfd, sec)
+ bfd *abfd;
+ asection *sec;
+{
+ if (coff_section_data (abfd, sec) == NULL)
+ {
+ sec->used_by_bfd = bfd_zalloc (abfd,
+ sizeof (struct coff_section_tdata));
+ if (sec->used_by_bfd == NULL)
+ return false;
+ }
+
+ if (coff_section_data (abfd, sec)->contents == NULL)
+ {
+ coff_section_data (abfd, sec)->contents =
+ (bfd_byte *) bfd_malloc (sec->_raw_size);
+ if (coff_section_data (abfd, sec)->contents == NULL)
+ return false;
+
+ if (! bfd_get_section_contents (abfd, sec,
+ coff_section_data (abfd, sec)->contents,
+ (file_ptr) 0, sec->_raw_size))
+ return false;
+ }
+
+ return true;
+}
+
+/* Get the size required to hold the dynamic symbols. */
+
+long
+_bfd_xcoff_get_dynamic_symtab_upper_bound (abfd)
+ bfd *abfd;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ return (ldhdr.l_nsyms + 1) * sizeof (asymbol *);
+}
+
+/* Get the dynamic symbols. */
+
+long
+_bfd_xcoff_canonicalize_dynamic_symtab (abfd, psyms)
+ bfd *abfd;
+ asymbol **psyms;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+ coff_symbol_type *symbuf;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ coff_section_data (abfd, lsec)->keep_contents = true;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ strings = (char *) contents + ldhdr.l_stoff;
+
+ symbuf = ((coff_symbol_type *)
+ bfd_zalloc (abfd, ldhdr.l_nsyms * sizeof (coff_symbol_type)));
+ if (symbuf == NULL)
+ return -1;
+
+ elsym = (struct external_ldsym *) (contents + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ for (; elsym < elsymend; elsym++, symbuf++, psyms++)
+ {
+ struct internal_ldsym ldsym;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ symbuf->symbol.the_bfd = abfd;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ symbuf->symbol.name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ int i;
+
+ for (i = 0; i < SYMNMLEN; i++)
+ if (ldsym._l._l_name[i] == '\0')
+ break;
+ if (i < SYMNMLEN)
+ symbuf->symbol.name = (char *) elsym->_l._l_name;
+ else
+ {
+ char *c;
+
+ c = bfd_alloc (abfd, SYMNMLEN + 1);
+ if (c == NULL)
+ return -1;
+ memcpy (c, ldsym._l._l_name, SYMNMLEN);
+ c[SYMNMLEN] = '\0';
+ symbuf->symbol.name = c;
+ }
+ }
+
+ if (ldsym.l_smclas == XMC_XO)
+ symbuf->symbol.section = bfd_abs_section_ptr;
+ else
+ symbuf->symbol.section = coff_section_from_bfd_index (abfd,
+ ldsym.l_scnum);
+ symbuf->symbol.value = ldsym.l_value - symbuf->symbol.section->vma;
+
+ symbuf->symbol.flags = BSF_NO_FLAGS;
+ if ((ldsym.l_smtype & L_EXPORT) != 0)
+ symbuf->symbol.flags |= BSF_GLOBAL;
+
+ /* FIXME: We have no way to record the other information stored
+ with the loader symbol. */
+
+ *psyms = (asymbol *) symbuf;
+ }
+
+ *psyms = NULL;
+
+ return ldhdr.l_nsyms;
+}
+
+/* Get the size required to hold the dynamic relocs. */
+
+long
+_bfd_xcoff_get_dynamic_reloc_upper_bound (abfd)
+ bfd *abfd;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ return (ldhdr.l_nreloc + 1) * sizeof (arelent *);
+}
+
+/* The typical dynamic reloc. */
+
+static reloc_howto_type xcoff_dynamic_reloc =
+ HOWTO (0, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ false, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ 0, /* special_function */
+ "R_POS", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false); /* pcrel_offset */
+
+/* Get the dynamic relocs. */
+
+long
+_bfd_xcoff_canonicalize_dynamic_reloc (abfd, prelocs, syms)
+ bfd *abfd;
+ arelent **prelocs;
+ asymbol **syms;
+{
+ asection *lsec;
+ bfd_byte *contents;
+ struct internal_ldhdr ldhdr;
+ arelent *relbuf;
+ struct external_ldrel *elrel, *elrelend;
+
+ if ((abfd->flags & DYNAMIC) == 0)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ bfd_set_error (bfd_error_no_symbols);
+ return -1;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return -1;
+ contents = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) contents, &ldhdr);
+
+ relbuf = (arelent *) bfd_alloc (abfd, ldhdr.l_nreloc * sizeof (arelent));
+ if (relbuf == NULL)
+ return -1;
+
+ elrel = ((struct external_ldrel *)
+ (contents + LDHDRSZ + ldhdr.l_nsyms * LDSYMSZ));
+ elrelend = elrel + ldhdr.l_nreloc;
+ for (; elrel < elrelend; elrel++, relbuf++, prelocs++)
+ {
+ struct internal_ldrel ldrel;
+
+ xcoff_swap_ldrel_in (abfd, elrel, &ldrel);
+
+ if (ldrel.l_symndx >= 3)
+ relbuf->sym_ptr_ptr = syms + (ldrel.l_symndx - 3);
+ else
+ {
+ const char *name;
+ asection *sec;
+
+ switch (ldrel.l_symndx)
+ {
+ case 0:
+ name = ".text";
+ break;
+ case 1:
+ name = ".data";
+ break;
+ case 2:
+ name = ".bss";
+ break;
+ default:
+ abort ();
+ break;
+ }
+
+ sec = bfd_get_section_by_name (abfd, name);
+ if (sec == NULL)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return -1;
+ }
+
+ relbuf->sym_ptr_ptr = sec->symbol_ptr_ptr;
+ }
+
+ relbuf->address = ldrel.l_vaddr;
+ relbuf->addend = 0;
+
+ /* Most dynamic relocs have the same type. FIXME: This is only
+ correct if ldrel.l_rtype == 0. In other cases, we should use
+ a different howto. */
+ relbuf->howto = &xcoff_dynamic_reloc;
+
+ /* FIXME: We have no way to record the l_rsecnm field. */
+
+ *prelocs = relbuf;
+ }
+
+ *prelocs = NULL;
+
+ return ldhdr.l_nreloc;
+}
+\f
/* Routine to create an entry in an XCOFF link hash table. */
static struct bfd_hash_entry *
ret = ((struct xcoff_link_hash_entry *)
bfd_hash_allocate (table, sizeof (struct xcoff_link_hash_entry)));
if (ret == (struct xcoff_link_hash_entry *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return (struct bfd_hash_entry *) ret;
- }
+ return (struct bfd_hash_entry *) ret;
/* Call the allocation method of the superclass. */
ret = ((struct xcoff_link_hash_entry *)
if (ret != NULL)
{
/* Set local fields. */
- ret->xcoff = false;
ret->indx = -1;
- ret->toc = false;
+ ret->toc_section = NULL;
+ ret->u.toc_indx = -1;
+ ret->descriptor = NULL;
+ ret->ldsym = NULL;
+ ret->ldindx = -1;
+ ret->flags = 0;
+ ret->smclas = XMC_UA;
}
return (struct bfd_hash_entry *) ret;
ret = ((struct xcoff_link_hash_table *)
bfd_alloc (abfd, sizeof (struct xcoff_link_hash_table)));
if (ret == (struct xcoff_link_hash_table *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return (struct bfd_link_hash_table *) NULL;
- }
+ return (struct bfd_link_hash_table *) NULL;
if (! _bfd_link_hash_table_init (&ret->root, abfd, xcoff_link_hash_newfunc))
{
bfd_release (abfd, ret);
ret->debug_strtab = _bfd_xcoff_stringtab_init ();
ret->debug_section = NULL;
+ ret->loader_section = NULL;
+ ret->ldrel_count = 0;
+ memset (&ret->ldhdr, 0, sizeof (struct internal_ldhdr));
+ ret->linkage_section = NULL;
+ ret->toc_section = NULL;
+ ret->descriptor_section = NULL;
+ ret->imports = NULL;
+ ret->file_align = 0;
+ ret->textro = false;
+ ret->gc = false;
+ memset (ret->special_sections, 0, sizeof ret->special_sections);
+
+ /* The linker will always generate a full a.out header. We need to
+ record that fact now, before the sizeof_headers routine could be
+ called. */
+ xcoff_data (abfd)->full_aouthdr = true;
return &ret->root;
}
just a cast. */
#define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
+\f
+/* Read internal relocs for an XCOFF csect. This is a wrapper around
+ _bfd_coff_read_internal_relocs which tries to take advantage of any
+ relocs which may have been cached for the enclosing section. */
+
+static struct internal_reloc *
+xcoff_read_internal_relocs (abfd, sec, cache, external_relocs,
+ require_internal, internal_relocs)
+ bfd *abfd;
+ asection *sec;
+ boolean cache;
+ bfd_byte *external_relocs;
+ boolean require_internal;
+ struct internal_reloc *internal_relocs;
+{
+ if (coff_section_data (abfd, sec) != NULL
+ && coff_section_data (abfd, sec)->relocs == NULL
+ && xcoff_section_data (abfd, sec) != NULL)
+ {
+ asection *enclosing;
+
+ enclosing = xcoff_section_data (abfd, sec)->enclosing;
+
+ if (enclosing != NULL
+ && (coff_section_data (abfd, enclosing) == NULL
+ || coff_section_data (abfd, enclosing)->relocs == NULL)
+ && cache
+ && enclosing->reloc_count > 0)
+ {
+ if (_bfd_coff_read_internal_relocs (abfd, enclosing, true,
+ external_relocs, false,
+ (struct internal_reloc *) NULL)
+ == NULL)
+ return NULL;
+ }
+
+ if (enclosing != NULL
+ && coff_section_data (abfd, enclosing) != NULL
+ && coff_section_data (abfd, enclosing)->relocs != NULL)
+ {
+ size_t off;
+
+ off = ((sec->rel_filepos - enclosing->rel_filepos)
+ / bfd_coff_relsz (abfd));
+ if (! require_internal)
+ return coff_section_data (abfd, enclosing)->relocs + off;
+ memcpy (internal_relocs,
+ coff_section_data (abfd, enclosing)->relocs + off,
+ sec->reloc_count * sizeof (struct internal_reloc));
+ return internal_relocs;
+ }
+ }
+ return _bfd_coff_read_internal_relocs (abfd, sec, cache, external_relocs,
+ require_internal, internal_relocs);
+}
+\f
/* Given an XCOFF BFD, add symbols to the global hash table as
appropriate. */
{
case bfd_object:
return xcoff_link_add_object_symbols (abfd, info);
+
case bfd_archive:
- return (_bfd_generic_link_add_archive_symbols
- (abfd, info, xcoff_link_check_archive_element));
- default:
- bfd_set_error (bfd_error_wrong_format);
+ /* If the archive has a map, do the usual search. We then need
+ to check the archive for stripped dynamic objects, because
+ they will not appear in the archive map even though they
+ should, perhaps, be included. If the archive has no map, we
+ just consider each object file in turn, since that apparently
+ is what the AIX native linker does. */
+ if (bfd_has_map (abfd))
+ {
+ if (! (_bfd_generic_link_add_archive_symbols
+ (abfd, info, xcoff_link_check_archive_element)))
+ return false;
+ }
+
+ {
+ bfd *member;
+
+ member = bfd_openr_next_archived_file (abfd, (bfd *) NULL);
+ while (member != NULL)
+ {
+ if (bfd_check_format (member, bfd_object)
+ && (! bfd_has_map (abfd)
+ || ((member->flags & DYNAMIC) != 0
+ && (member->flags & HAS_SYMS) == 0)))
+ {
+ boolean needed;
+
+ if (! xcoff_link_check_archive_element (member, info, &needed))
+ return false;
+ if (needed)
+ member->archive_pass = -1;
+ }
+ member = bfd_openr_next_archived_file (abfd, member);
+ }
+ }
+
+ return true;
+
+ default:
+ bfd_set_error (bfd_error_wrong_format);
return false;
}
}
*pneeded = false;
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link
+ && info->hash->creator == abfd->xvec)
+ return xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded);
+
symesz = bfd_coff_symesz (abfd);
esym = (bfd_byte *) obj_coff_external_syms (abfd);
esym_end = esym + obj_raw_syment_count (abfd) * symesz;
/* We are only interested in symbols that are currently
undefined. If a symbol is currently known to be common,
XCOFF linkers do not bring in an object file which
- defines it. */
+ defines it. We also don't bring in symbols to satisfy
+ undefined references in shared objects. */
if (h != (struct bfd_link_hash_entry *) NULL
- && h->type == bfd_link_hash_undefined)
+ && h->type == bfd_link_hash_undefined
+ && (info->hash->creator != abfd->xvec
+ || (((struct xcoff_link_hash_entry *) h)->flags
+ & XCOFF_DEF_DYNAMIC) == 0))
{
if (! (*info->callbacks->add_archive_element) (info, abfd, name))
return false;
return true;
}
+/* Look through the loader symbols to see if this dynamic object
+ should be included in the link. The native linker uses the loader
+ symbols, not the normal symbol table, so we do too. */
+
+static boolean
+xcoff_link_check_dynamic_ar_symbols (abfd, info, pneeded)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ boolean *pneeded;
+{
+ asection *lsec;
+ bfd_byte *buf;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+
+ *pneeded = false;
+
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ /* There are no symbols, so don't try to include it. */
+ return true;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return false;
+ buf = coff_section_data (abfd, lsec)->contents;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
+
+ strings = (char *) buf + ldhdr.l_stoff;
+
+ elsym = (struct external_ldsym *) (buf + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ for (; elsym < elsymend; elsym++)
+ {
+ struct internal_ldsym ldsym;
+ char nambuf[SYMNMLEN + 1];
+ const char *name;
+ struct bfd_link_hash_entry *h;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ /* We are only interested in exported symbols. */
+ if ((ldsym.l_smtype & L_EXPORT) == 0)
+ continue;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
+ nambuf[SYMNMLEN] = '\0';
+ name = nambuf;
+ }
+
+ h = bfd_link_hash_lookup (info->hash, name, false, false, true);
+
+ /* We are only interested in symbols that are currently
+ undefined. At this point we know that we are using an XCOFF
+ hash table. */
+ if (h != NULL
+ && h->type == bfd_link_hash_undefined
+ && (((struct xcoff_link_hash_entry *) h)->flags
+ & XCOFF_DEF_DYNAMIC) == 0)
+ {
+ if (! (*info->callbacks->add_archive_element) (info, abfd, name))
+ return false;
+ *pneeded = true;
+ return true;
+ }
+ }
+
+ /* We do not need this shared object. */
+
+ if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
+ {
+ free (coff_section_data (abfd, lsec)->contents);
+ coff_section_data (abfd, lsec)->contents = NULL;
+ }
+
+ return true;
+}
+
+/* Returns the index of reloc in RELOCS with the least address greater
+ than or equal to ADDRESS. The relocs are sorted by address. */
+
+static bfd_size_type
+xcoff_find_reloc (relocs, count, address)
+ struct internal_reloc *relocs;
+ bfd_size_type count;
+ bfd_vma address;
+{
+ bfd_size_type min, max, this;
+
+ if (count < 2)
+ {
+ if (count == 1 && relocs[0].r_vaddr < address)
+ return 1;
+ else
+ return 0;
+ }
+
+ min = 0;
+ max = count;
+
+ /* Do a binary search over (min,max]. */
+ while (min + 1 < max)
+ {
+ bfd_vma raddr;
+
+ this = (max + min) / 2;
+ raddr = relocs[this].r_vaddr;
+ if (raddr > address)
+ max = this;
+ else if (raddr < address)
+ min = this;
+ else
+ {
+ min = this;
+ break;
+ }
+ }
+
+ if (relocs[min].r_vaddr < address)
+ return min + 1;
+
+ while (min > 0
+ && relocs[min - 1].r_vaddr == address)
+ --min;
+
+ return min;
+}
+
/* Add all the symbols from an object file to the hash table.
XCOFF is a weird format. A normal XCOFF .o files will have three
bfd *abfd;
struct bfd_link_info *info;
{
+ unsigned int n_tmask;
+ unsigned int n_btshft;
boolean default_copy;
bfd_size_type symcount;
struct xcoff_link_hash_entry **sym_hash;
asection **csect_cache;
- asection *debug_section;
- unsigned long *debug_index = NULL;
- bfd_byte *debug_contents = NULL;
- asection *sub;
+ bfd_size_type linesz;
+ asection *o;
+ asection *last_real;
+ boolean keep_syms;
asection *csect;
unsigned int csect_index;
asection *first_csect;
- boolean new_debug;
bfd_size_type symesz;
bfd_byte *esym;
bfd_byte *esym_end;
struct reloc_info_struct
{
struct internal_reloc *relocs;
- boolean *used;
+ asection **csects;
+ bfd_byte *linenos;
} *reloc_info = NULL;
+ keep_syms = obj_coff_keep_syms (abfd);
+
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link)
+ {
+ if (! xcoff_link_add_dynamic_symbols (abfd, info))
+ return false;
+ }
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ /* We need to build a .loader section, so we do it here. This
+ won't work if we're producing an XCOFF output file with no
+ XCOFF input files. FIXME. */
+ if (xcoff_hash_table (info)->loader_section == NULL)
+ {
+ asection *lsec;
+
+ lsec = bfd_make_section_anyway (abfd, ".loader");
+ if (lsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->loader_section = lsec;
+ lsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+ }
+ /* Likewise for the linkage section. */
+ if (xcoff_hash_table (info)->linkage_section == NULL)
+ {
+ asection *lsec;
+
+ lsec = bfd_make_section_anyway (abfd, ".gl");
+ if (lsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->linkage_section = lsec;
+ lsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ lsec->alignment_power = 2;
+ }
+ /* Likewise for the TOC section. */
+ if (xcoff_hash_table (info)->toc_section == NULL)
+ {
+ asection *tsec;
+
+ tsec = bfd_make_section_anyway (abfd, ".tc");
+ if (tsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->toc_section = tsec;
+ tsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ tsec->alignment_power = 2;
+ }
+ /* Likewise for the descriptor section. */
+ if (xcoff_hash_table (info)->descriptor_section == NULL)
+ {
+ asection *dsec;
+
+ dsec = bfd_make_section_anyway (abfd, ".ds");
+ if (dsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->descriptor_section = dsec;
+ dsec->flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY);
+ dsec->alignment_power = 2;
+ }
+ /* Likewise for the .debug section. */
+ if (xcoff_hash_table (info)->debug_section == NULL
+ && info->strip != strip_all)
+ {
+ asection *dsec;
+
+ dsec = bfd_make_section_anyway (abfd, ".debug");
+ if (dsec == NULL)
+ goto error_return;
+ xcoff_hash_table (info)->debug_section = dsec;
+ dsec->flags |= SEC_HAS_CONTENTS | SEC_IN_MEMORY;
+ }
+ }
+
+ if ((abfd->flags & DYNAMIC) != 0
+ && ! info->static_link)
+ return true;
+
+ n_tmask = coff_data (abfd)->local_n_tmask;
+ n_btshft = coff_data (abfd)->local_n_btshft;
+
+ /* Define macros so that ISFCN, et. al., macros work correctly. */
+#define N_TMASK n_tmask
+#define N_BTSHFT n_btshft
+
if (info->keep_memory)
default_copy = false;
else
(symcount
* sizeof (struct xcoff_link_hash_entry *))));
if (sym_hash == NULL && symcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
coff_data (abfd)->sym_hashes = (struct coff_link_hash_entry **) sym_hash;
memset (sym_hash, 0,
(size_t) symcount * sizeof (struct xcoff_link_hash_entry *));
csect_cache = ((asection **)
bfd_alloc (abfd, symcount * sizeof (asection *)));
if (csect_cache == NULL && symcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
xcoff_data (abfd)->csects = csect_cache;
memset (csect_cache, 0, (size_t) symcount * sizeof (asection *));
- /* XCOFF stores debugging symbol names in the .debug section. We
- need to determine the size of the final .debug section while
- reading the input files, before the linker starts deciding where
- to put everything. We build a hash table for the final .debug
- section. For each symbol whose name goes into it, we store the
- index in the .debug section in the debug_indices array. */
- debug_section = bfd_get_section_by_name (abfd, ".debug");
- if (debug_section != NULL && debug_section->_raw_size > 0)
- {
- debug_index = ((unsigned long *)
- bfd_zalloc (abfd, symcount * sizeof (unsigned long)));
- if (debug_index == NULL && symcount != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- xcoff_data (abfd)->debug_indices = debug_index;
-
- /* Grab the contents of the current .debug section. We use
- malloc and copy the names into the string tab hash table,
- rather than bfd_alloc, because I expect that when linking
- many files together, many of the strings will be the same.
- Storing the strings in the hash table should save space in
- that case. */
- debug_contents = (bfd_byte *) malloc (debug_section->_raw_size);
- if (debug_contents == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- if (! bfd_get_section_contents (abfd, debug_section,
- (PTR) debug_contents, (file_ptr) 0,
- debug_section->_raw_size))
- goto error_return;
- }
-
/* While splitting sections into csects, we need to assign the
relocs correctly. The relocs and the csects must both be in
order by VMA within a given section, so we handle this by
scanning along the relocs as we process the csects. We index
into reloc_info using the section target_index. */
reloc_info = ((struct reloc_info_struct *)
- malloc ((abfd->section_count + 1)
- * sizeof (struct reloc_info_struct)));
+ bfd_malloc ((abfd->section_count + 1)
+ * sizeof (struct reloc_info_struct)));
if (reloc_info == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
memset ((PTR) reloc_info, 0,
(abfd->section_count + 1) * sizeof (struct reloc_info_struct));
- /* Read in the relocs for each section which has relocs. */
- for (sub = abfd->sections; sub != NULL; sub = sub->next)
+ /* Read in the relocs and line numbers for each section. */
+ linesz = bfd_coff_linesz (abfd);
+ last_real = NULL;
+ for (o = abfd->sections; o != NULL; o = o->next)
{
- if ((sub->flags & SEC_RELOC) != 0)
+ last_real = o;
+ if ((o->flags & SEC_RELOC) != 0)
{
- reloc_info[sub->target_index].relocs =
- _bfd_coff_read_internal_relocs (abfd, sub, true,
- (bfd_byte *) NULL, false,
- (struct internal_reloc *) NULL);
- reloc_info[sub->target_index].used =
- (boolean *) malloc (sub->reloc_count * sizeof (boolean));
- if (reloc_info[sub->target_index].used == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- memset (reloc_info[sub->target_index].used, 0,
- sub->reloc_count * sizeof (boolean));
+ reloc_info[o->target_index].relocs =
+ xcoff_read_internal_relocs (abfd, o, true, (bfd_byte *) NULL,
+ false, (struct internal_reloc *) NULL);
+ reloc_info[o->target_index].csects =
+ (asection **) bfd_malloc (o->reloc_count * sizeof (asection *));
+ if (reloc_info[o->target_index].csects == NULL)
+ goto error_return;
+ memset (reloc_info[o->target_index].csects, 0,
+ o->reloc_count * sizeof (asection *));
+ }
+
+ if ((info->strip == strip_none || info->strip == strip_some)
+ && o->lineno_count > 0)
+ {
+ bfd_byte *linenos;
+
+ linenos = (bfd_byte *) bfd_malloc (o->lineno_count * linesz);
+ if (linenos == NULL)
+ goto error_return;
+ reloc_info[o->target_index].linenos = linenos;
+ if (bfd_seek (abfd, o->line_filepos, SEEK_SET) != 0
+ || (bfd_read (linenos, linesz, o->lineno_count, abfd)
+ != linesz * o->lineno_count))
+ goto error_return;
}
}
+ /* Don't let the linker relocation routines discard the symbols. */
+ obj_coff_keep_syms (abfd) = true;
+
csect = NULL;
csect_index = 0;
first_csect = NULL;
- new_debug = false;
symesz = bfd_coff_symesz (abfd);
BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
{
struct internal_syment sym;
union internal_auxent aux;
- PTR name;
+ const char *name;
char buf[SYMNMLEN + 1];
int smtyp;
flagword flags;
asection *section;
bfd_vma value;
+ struct xcoff_link_hash_entry *set_toc;
bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &sym);
- *debug_index = (unsigned long) -1;
-
- /* If the name of this symbol is in the .debug section, and it
- looks like we are going to keep it, add the name to the
- .debug hash table. */
- if (info->hash->creator == abfd->xvec
- && sym._n._n_n._n_zeroes == 0
- && info->strip != strip_all
- && info->strip != strip_debugger
- && info->discard != discard_all
- && bfd_coff_symname_in_debug (abfd, &sym))
- {
- bfd_size_type indx;
-
- /* Add 2 to skip the length. */
- name = debug_contents + sym._n._n_n._n_offset;
-
- indx = _bfd_stringtab_add (xcoff_hash_table (info)->debug_strtab,
- name, true, true);
- if (indx == (bfd_size_type) -1)
- goto error_return;
- *debug_index = indx;
- new_debug = true;
- }
-
/* In this pass we are only interested in symbols with csect
information. */
if (sym.n_sclass != C_EXT && sym.n_sclass != C_HIDEXT)
{
+ if (sym.n_sclass == C_FILE && csect != NULL)
+ {
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+ csect = NULL;
+ }
+
if (csect != NULL)
*csect_cache = csect;
- else if (first_csect == NULL)
+ else if (first_csect == NULL || sym.n_sclass == C_FILE)
*csect_cache = coff_section_from_bfd_index (abfd, sym.n_scnum);
else
*csect_cache = NULL;
esym += (sym.n_numaux + 1) * symesz;
sym_hash += sym.n_numaux + 1;
csect_cache += sym.n_numaux + 1;
- if (debug_index != NULL)
- debug_index += sym.n_numaux + 1;
continue;
}
if (name == NULL)
goto error_return;
+ /* If this symbol has line number information attached to it,
+ and we're not stripping it, count the number of entries and
+ add them to the count for this csect. In the final link pass
+ we are going to attach line number information by symbol,
+ rather than by section, in order to more easily handle
+ garbage collection. */
+ if ((info->strip == strip_none || info->strip == strip_some)
+ && sym.n_numaux > 1
+ && csect != NULL
+ && ISFCN (sym.n_type))
+ {
+ union internal_auxent auxlin;
+
+ bfd_coff_swap_aux_in (abfd, (PTR) (esym + symesz),
+ sym.n_type, sym.n_sclass,
+ 0, sym.n_numaux, (PTR) &auxlin);
+ if (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
+ {
+ asection *enclosing;
+ bfd_size_type linoff;
+
+ enclosing = xcoff_section_data (abfd, csect)->enclosing;
+ if (enclosing == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' has line numbers but no enclosing section"),
+ bfd_get_filename (abfd), name);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+ linoff = (auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr
+ - enclosing->line_filepos);
+ if (linoff < enclosing->lineno_count * linesz)
+ {
+ struct internal_lineno lin;
+ bfd_byte *linpstart;
+
+ linpstart = (reloc_info[enclosing->target_index].linenos
+ + linoff);
+ bfd_coff_swap_lineno_in (abfd, (PTR) linpstart, (PTR) &lin);
+ if (lin.l_lnno == 0
+ && ((bfd_size_type) lin.l_addr.l_symndx
+ == ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz)))
+ {
+ bfd_byte *linpend, *linp;
+
+ linpend = (reloc_info[enclosing->target_index].linenos
+ + enclosing->lineno_count * linesz);
+ for (linp = linpstart + linesz;
+ linp < linpend;
+ linp += linesz)
+ {
+ bfd_coff_swap_lineno_in (abfd, (PTR) linp,
+ (PTR) &lin);
+ if (lin.l_lnno == 0)
+ break;
+ }
+ csect->lineno_count += (linp - linpstart) / linesz;
+ /* The setting of line_filepos will only be
+ useful if all the line number entries for a
+ csect are contiguous; this only matters for
+ error reporting. */
+ if (csect->line_filepos == 0)
+ csect->line_filepos =
+ auxlin.x_sym.x_fcnary.x_fcn.x_lnnoptr;
+ }
+ }
+ }
+ }
+
/* Pick up the csect auxiliary information. */
if (sym.n_numaux == 0)
{
(*_bfd_error_handler)
- ("%s: class %d symbol `%s' has no aux entries",
+ (_("%s: class %d symbol `%s' has no aux entries"),
bfd_get_filename (abfd), sym.n_sclass, name);
bfd_set_error (bfd_error_bad_value);
goto error_return;
flags = BSF_GLOBAL;
section = NULL;
value = 0;
+ set_toc = NULL;
switch (smtyp)
{
default:
(*_bfd_error_handler)
- ("%s: symbol `%s' has unrecognized csect type %d",
+ (_("%s: symbol `%s' has unrecognized csect type %d"),
bfd_get_filename (abfd), name, smtyp);
bfd_set_error (bfd_error_bad_value);
goto error_return;
|| aux.x_csect.x_scnlen.l != 0)
{
(*_bfd_error_handler)
- ("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d",
+ (_("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d"),
bfd_get_filename (abfd), name, sym.n_sclass, sym.n_scnum,
aux.x_csect.x_scnlen.l);
bfd_set_error (bfd_error_bad_value);
goto error_return;
}
- section = bfd_und_section_ptr;
+
+ /* An XMC_XO external reference is actually a reference to
+ an absolute location. */
+ if (aux.x_csect.x_smclas != XMC_XO)
+ section = bfd_und_section_ptr;
+ else
+ {
+ section = bfd_abs_section_ptr;
+ value = sym.n_value;
+ }
break;
case XTY_SD:
/* This is a csect definition. */
+ if (csect != NULL)
+ {
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+ }
+
csect = NULL;
csect_index = -1;
|| aux.x_csect.x_scnlen.l != 0)
{
(*_bfd_error_handler)
- ("%s: XMC_TC0 symbol `%s' is class %d scnlen %d",
+ (_("%s: XMC_TC0 symbol `%s' is class %d scnlen %d"),
bfd_get_filename (abfd), name, sym.n_sclass,
aux.x_csect.x_scnlen.l);
bfd_set_error (bfd_error_bad_value);
that we must look through the relocations. Ick. */
if (aux.x_csect.x_smclas == XMC_TC
&& sym.n_sclass == C_HIDEXT
- && aux.x_csect.x_scnlen.l == 4)
+ && aux.x_csect.x_scnlen.l == 4
+ && info->hash->creator == abfd->xvec)
{
asection *enclosing;
+ struct internal_reloc *relocs;
bfd_size_type relindx;
struct internal_reloc *rel;
- boolean *used;
enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
if (enclosing == NULL)
- return false;
+ goto error_return;
- /* XCOFF requires that relocs be sorted by address, so
- we could do a binary search here. FIXME. */
- rel = reloc_info[enclosing->target_index].relocs;
- used = reloc_info[enclosing->target_index].used;
- for (relindx = 0;
- relindx < enclosing->reloc_count;
- relindx++, rel++, used++)
- {
- if (! *used
- && rel->r_vaddr == (bfd_vma) sym.n_value
- && rel->r_size == 31
- && rel->r_type == 0)
- break;
- }
- if (relindx < enclosing->reloc_count)
+ relocs = reloc_info[enclosing->target_index].relocs;
+ relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
+ sym.n_value);
+ rel = relocs + relindx;
+ if (relindx < enclosing->reloc_count
+ && rel->r_vaddr == (bfd_vma) sym.n_value
+ && rel->r_size == 31
+ && rel->r_type == R_POS)
{
bfd_byte *erelsym;
struct internal_syment relsym;
relname = _bfd_coff_internal_syment_name (abfd, &relsym,
relbuf);
if (relname == NULL)
- return false;
- copy = (! info->keep_memory
- || relsym._n._n_n._n_zeroes != 0
- || relsym._n._n_n._n_offset == 0);
- h = xcoff_link_hash_lookup (xcoff_hash_table (info),
- relname, true, copy, false);
- if (h == NULL)
- return false;
-
- /* At this point h->root.type could be
- bfd_link_hash_new. That should be OK, since
- we know for sure that we will come across
- this symbol as we step through the file. */
-
- /* Stuff h into *sym_hash. We normally only set
- *sym_hash for global variables. Remembering
- it here saves us doing this work again later. */
- *sym_hash = h;
-
- if (h->toc)
+ goto error_return;
+
+ /* We only merge TOC entries if the TC name is
+ the same as the symbol name. This handles
+ the normal case, but not common cases like
+ SYM.P4 which gcc generates to store SYM + 4
+ in the TOC. FIXME. */
+ if (strcmp (name, relname) == 0)
{
- /* We already have a TOC entry for this
- symbol, so we can just ignore this one.
- We need to skip the csect, and the reloc
- as well. */
- *used = true;
- break;
+ copy = (! info->keep_memory
+ || relsym._n._n_n._n_zeroes != 0
+ || relsym._n._n_n._n_offset == 0);
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ relname, true, copy,
+ false);
+ if (h == NULL)
+ goto error_return;
+
+ /* At this point h->root.type could be
+ bfd_link_hash_new. That should be OK,
+ since we know for sure that we will come
+ across this symbol as we step through the
+ file. */
+
+ /* We store h in *sym_hash for the
+ convenience of the relocate_section
+ function. */
+ *sym_hash = h;
+
+ if (h->toc_section != NULL)
+ {
+ asection **rel_csects;
+
+ /* We already have a TOC entry for this
+ symbol, so we can just ignore this
+ one. */
+ rel_csects =
+ reloc_info[enclosing->target_index].csects;
+ rel_csects[relindx] = bfd_und_section_ptr;
+ break;
+ }
+
+ /* We are about to create a TOC entry for
+ this symbol. */
+ set_toc = h;
}
-
- /* We are about to create a TOC entry for this
- symbol. */
- h->toc = true;
}
}
}
};
const char *csect_name;
asection *enclosing;
- struct internal_reloc *rel;
- bfd_size_type relindx;
- boolean *used;
if ((aux.x_csect.x_smclas >=
sizeof csect_name_by_class / sizeof csect_name_by_class[0])
|| csect_name_by_class[aux.x_csect.x_smclas] == NULL)
{
(*_bfd_error_handler)
- ("%s: symbol `%s' has unrecognized smclas %d",
+ (_("%s: symbol `%s' has unrecognized smclas %d"),
bfd_get_filename (abfd), name, aux.x_csect.x_smclas);
bfd_set_error (bfd_error_bad_value);
goto error_return;
enclosing = coff_section_from_bfd_index (abfd, sym.n_scnum);
if (enclosing == NULL)
goto error_return;
- if ((bfd_vma) sym.n_value < enclosing->vma
- || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
- > enclosing->vma + enclosing->_raw_size))
+ if (! bfd_is_abs_section (enclosing)
+ && ((bfd_vma) sym.n_value < enclosing->vma
+ || ((bfd_vma) sym.n_value + aux.x_csect.x_scnlen.l
+ > enclosing->vma + enclosing->_raw_size)))
{
(*_bfd_error_handler)
- ("%s: csect `%s' not in enclosing section",
+ (_("%s: csect `%s' not in enclosing section"),
bfd_get_filename (abfd), name);
bfd_set_error (bfd_error_bad_value);
goto error_return;
csect->flags |= SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
- /* XCOFF requires that relocs be sorted by address, so we
- could do a binary search here. FIXME. (XCOFF
- unfortunately does not require that symbols be sorted
- by address, or this would be a simple merge). */
- rel = reloc_info[enclosing->target_index].relocs;
- used = reloc_info[enclosing->target_index].used;
- for (relindx = 0;
- relindx < enclosing->reloc_count;
- relindx++, rel++, used++)
- {
- if (! *used
- && rel->r_vaddr >= csect->vma
- && rel->r_vaddr < csect->vma + csect->_raw_size)
- {
- csect->rel_filepos = (enclosing->rel_filepos
- + relindx * bfd_coff_relsz (abfd));
- break;
- }
- }
- while (relindx < enclosing->reloc_count
- && ! *used
- && rel->r_vaddr >= csect->vma
- && rel->r_vaddr < csect->vma + csect->_raw_size)
- {
- *used = true;
- csect->flags |= SEC_RELOC;
- ++csect->reloc_count;
- ++relindx;
- ++rel;
- ++used;
- }
-
- /* There are a number of other fields and section flags
- which we do not bother to set. */
-
/* Record the enclosing section in the tdata for this new
section. */
csect->used_by_bfd =
- ((struct coff_section_tdata *)
- bfd_alloc (abfd, sizeof (struct coff_section_tdata)));
+ (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
if (csect->used_by_bfd == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
coff_section_data (abfd, csect)->tdata =
- bfd_alloc (abfd, sizeof (struct xcoff_section_tdata));
+ bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
if (coff_section_data (abfd, csect)->tdata == NULL)
+ goto error_return;
+ xcoff_section_data (abfd, csect)->enclosing = enclosing;
+ xcoff_section_data (abfd, csect)->lineno_count =
+ enclosing->lineno_count;
+
+ if (enclosing->owner == abfd)
{
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
+ struct internal_reloc *relocs;
+ bfd_size_type relindx;
+ struct internal_reloc *rel;
+ asection **rel_csect;
+
+ relocs = reloc_info[enclosing->target_index].relocs;
+ relindx = xcoff_find_reloc (relocs, enclosing->reloc_count,
+ csect->vma);
+ rel = relocs + relindx;
+ rel_csect = (reloc_info[enclosing->target_index].csects
+ + relindx);
+ csect->rel_filepos = (enclosing->rel_filepos
+ + relindx * bfd_coff_relsz (abfd));
+ while (relindx < enclosing->reloc_count
+ && *rel_csect == NULL
+ && rel->r_vaddr < csect->vma + csect->_raw_size)
+ {
+ *rel_csect = csect;
+ csect->flags |= SEC_RELOC;
+ ++csect->reloc_count;
+ ++relindx;
+ ++rel;
+ ++rel_csect;
+ }
}
- xcoff_section_data (abfd, csect)->enclosing = enclosing;
+
+ /* There are a number of other fields and section flags
+ which we do not bother to set. */
csect_index = ((esym
- (bfd_byte *) obj_coff_external_syms (abfd))
/ symesz);
+ xcoff_section_data (abfd, csect)->first_symndx = csect_index;
+
if (first_csect == NULL)
first_csect = csect;
section = csect;
value = 0;
}
+
+ /* If this is a TOC section for a symbol, record it. */
+ if (set_toc != NULL)
+ set_toc->toc_section = csect;
}
break;
boolean bad;
bad = false;
- if (sym.n_sclass != C_EXT
- || aux.x_csect.x_scnlen.l < 0
+ if (aux.x_csect.x_scnlen.l < 0
|| (aux.x_csect.x_scnlen.l
>= esym - (bfd_byte *) obj_coff_external_syms (abfd)))
bad = true;
if (bad)
{
(*_bfd_error_handler)
- ("%s: misplaced XTY_LD `%s'",
+ (_("%s: misplaced XTY_LD `%s'"),
bfd_get_filename (abfd), name);
bfd_set_error (bfd_error_bad_value);
goto error_return;
case XTY_CM:
/* This is an unitialized csect. We could base the name on
- the storage mapping class, but we don't bother. If this
- csect is externally visible, it is a common symbol. */
- if (sym.n_sclass == C_EXT)
+ the storage mapping class, but we don't bother except for
+ an XMC_TD symbol. If this csect is externally visible,
+ it is a common symbol. We put XMC_TD symbols in sections
+ named .tocbss, and rely on the linker script to put that
+ in the TOC area. */
+
+ if (csect != NULL)
{
- section = bfd_com_section_ptr;
- value = aux.x_csect.x_scnlen.l;
+ xcoff_section_data (abfd, csect)->last_symndx =
+ ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
}
+
+ if (aux.x_csect.x_smclas == XMC_TD)
+ csect = bfd_make_section_anyway (abfd, ".tocbss");
else
- {
- csect = bfd_make_section_anyway (abfd, ".bss");
- if (csect == NULL)
- goto error_return;
- csect->vma = 0;
- csect->_raw_size = aux.x_csect.x_scnlen.l;
- csect->flags |= SEC_ALLOC;
- csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
- /* There are a number of other fields and section flags
- which we do not bother to set. */
+ csect = bfd_make_section_anyway (abfd, ".bss");
+ if (csect == NULL)
+ goto error_return;
+ csect->vma = sym.n_value;
+ csect->_raw_size = aux.x_csect.x_scnlen.l;
+ csect->flags |= SEC_ALLOC;
+ csect->alignment_power = SMTYP_ALIGN (aux.x_csect.x_smtyp);
+ /* There are a number of other fields and section flags
+ which we do not bother to set. */
+
+ csect_index = ((esym
+ - (bfd_byte *) obj_coff_external_syms (abfd))
+ / symesz);
+
+ csect->used_by_bfd =
+ (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
+ if (csect->used_by_bfd == NULL)
+ goto error_return;
+ coff_section_data (abfd, csect)->tdata =
+ bfd_zalloc (abfd, sizeof (struct xcoff_section_tdata));
+ if (coff_section_data (abfd, csect)->tdata == NULL)
+ goto error_return;
+ xcoff_section_data (abfd, csect)->first_symndx = csect_index;
- csect_index = ((esym
- - (bfd_byte *) obj_coff_external_syms (abfd))
- / symesz);
+ if (first_csect == NULL)
+ first_csect = csect;
- if (first_csect == NULL)
- first_csect = csect;
+ if (sym.n_sclass == C_EXT)
+ {
+ csect->flags |= SEC_IS_COMMON;
+ csect->_raw_size = 0;
+ section = csect;
+ value = aux.x_csect.x_scnlen.l;
}
+
break;
}
- /* Now we have enough information to add the symbol to the
- linker hash table. */
-
+ /* Check for magic symbol names. */
+ if ((smtyp == XTY_SD || smtyp == XTY_CM)
+ && aux.x_csect.x_smclas != XMC_TC
+ && aux.x_csect.x_smclas != XMC_TD)
+ {
+ int i;
+
+ i = -1;
+ if (name[0] == '_')
+ {
+ if (strcmp (name, "_text") == 0)
+ i = 0;
+ else if (strcmp (name, "_etext") == 0)
+ i = 1;
+ else if (strcmp (name, "_data") == 0)
+ i = 2;
+ else if (strcmp (name, "_edata") == 0)
+ i = 3;
+ else if (strcmp (name, "_end") == 0)
+ i = 4;
+ }
+ else if (name[0] == 'e' && strcmp (name, "end") == 0)
+ i = 5;
+
+ if (i != -1)
+ xcoff_hash_table (info)->special_sections[i] = csect;
+ }
+
+ /* Now we have enough information to add the symbol to the
+ linker hash table. */
+
if (sym.n_sclass == C_EXT)
{
- boolean copy;
+ boolean copy;
+
+ BFD_ASSERT (section != NULL);
+
+ /* We must copy the name into memory if we got it from the
+ syment itself, rather than the string table. */
+ copy = default_copy;
+ if (sym._n._n_n._n_zeroes != 0
+ || sym._n._n_n._n_offset == 0)
+ copy = true;
+
+ /* The AIX linker appears to only detect multiple symbol
+ definitions when there is a reference to the symbol. If
+ a symbol is defined multiple times, and the only
+ references are from the same object file, the AIX linker
+ appears to permit it. It does not merge the different
+ definitions, but handles them independently. On the
+ other hand, if there is a reference, the linker reports
+ an error.
+
+ This matters because the AIX <net/net_globals.h> header
+ file actually defines an initialized array, so we have to
+ actually permit that to work.
+
+ Just to make matters even more confusing, the AIX linker
+ appears to permit multiple symbol definitions whenever
+ the second definition is in an archive rather than an
+ object file. This may be a consequence of the manner in
+ which it handles archives: I think it may load the entire
+ archive in as separate csects, and then let garbage
+ collection discard symbols.
+
+ We also have to handle the case of statically linking a
+ shared object, which will cause symbol redefinitions,
+ although this is an easier case to detect. */
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ if (! bfd_is_und_section (section))
+ *sym_hash = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ name, true, copy, false);
+ else
+ *sym_hash = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (abfd, info, name,
+ true, copy, false));
+ if (*sym_hash == NULL)
+ goto error_return;
+ if (((*sym_hash)->root.type == bfd_link_hash_defined
+ || (*sym_hash)->root.type == bfd_link_hash_defweak)
+ && ! bfd_is_und_section (section)
+ && ! bfd_is_com_section (section))
+ {
+ /* This is a second definition of a defined symbol. */
+ if ((abfd->flags & DYNAMIC) != 0
+ && ((*sym_hash)->smclas != XMC_GL
+ || aux.x_csect.x_smclas == XMC_GL
+ || ((*sym_hash)->root.u.def.section->owner->flags
+ & DYNAMIC) == 0))
+ {
+ /* The new symbol is from a shared library, and
+ either the existing symbol is not global
+ linkage code or this symbol is global linkage
+ code. If the existing symbol is global
+ linkage code and the new symbol is not, then
+ we want to use the new symbol. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ }
+ else if (((*sym_hash)->root.u.def.section->owner->flags
+ & DYNAMIC) != 0)
+ {
+ /* The existing symbol is from a shared library.
+ Replace it. */
+ (*sym_hash)->root.type = bfd_link_hash_undefined;
+ (*sym_hash)->root.u.undef.abfd =
+ (*sym_hash)->root.u.def.section->owner;
+ }
+ else if (abfd->my_archive != NULL)
+ {
+ /* This is a redefinition in an object contained
+ in an archive. Just ignore it. See the
+ comment above. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ }
+ else if ((*sym_hash)->root.next != NULL
+ || info->hash->undefs_tail == &(*sym_hash)->root)
+ {
+ /* This symbol has been referenced. In this
+ case, we just continue and permit the
+ multiple definition error. See the comment
+ above about the behaviour of the AIX linker. */
+ }
+ else if ((*sym_hash)->smclas == aux.x_csect.x_smclas)
+ {
+ /* The symbols are both csects of the same
+ class. There is at least a chance that this
+ is a semi-legitimate redefinition. */
+ section = bfd_und_section_ptr;
+ value = 0;
+ (*sym_hash)->flags |= XCOFF_MULTIPLY_DEFINED;
+ }
+ }
+ else if (((*sym_hash)->flags & XCOFF_MULTIPLY_DEFINED) != 0
+ && ((*sym_hash)->root.type == bfd_link_hash_defined
+ || (*sym_hash)->root.type == bfd_link_hash_defweak)
+ && (bfd_is_und_section (section)
+ || bfd_is_com_section (section)))
+ {
+ /* This is a reference to a multiply defined symbol.
+ Report the error now. See the comment above
+ about the behaviour of the AIX linker. We could
+ also do this with warning symbols, but I'm not
+ sure the XCOFF linker is wholly prepared to
+ handle them, and that would only be a warning,
+ not an error. */
+ if (! ((*info->callbacks->multiple_definition)
+ (info, (*sym_hash)->root.root.string,
+ (bfd *) NULL, (asection *) NULL, 0,
+ (*sym_hash)->root.u.def.section->owner,
+ (*sym_hash)->root.u.def.section,
+ (*sym_hash)->root.u.def.value)))
+ goto error_return;
+ /* Try not to give this error too many times. */
+ (*sym_hash)->flags &= ~XCOFF_MULTIPLY_DEFINED;
+ }
+ }
+
+ /* _bfd_generic_link_add_one_symbol may call the linker to
+ generate an error message, and the linker may try to read
+ the symbol table to give a good error. Right now, the
+ line numbers are in an inconsistent state, since they are
+ counted both in the real sections and in the new csects.
+ We need to leave the count in the real sections so that
+ the linker can report the line number of the error
+ correctly, so temporarily clobber the link to the csects
+ so that the linker will not try to read the line numbers
+ a second time from the csects. */
+ BFD_ASSERT (last_real->next == first_csect);
+ last_real->next = NULL;
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, name, flags, section, value,
+ (const char *) NULL, copy, true,
+ (struct bfd_link_hash_entry **) sym_hash)))
+ goto error_return;
+ last_real->next = first_csect;
+
+ if (smtyp == XTY_CM)
+ {
+ if ((*sym_hash)->root.type != bfd_link_hash_common
+ || (*sym_hash)->root.u.c.p->section != csect)
+ {
+ /* We don't need the common csect we just created. */
+ csect->_raw_size = 0;
+ }
+ else
+ {
+ (*sym_hash)->root.u.c.p->alignment_power
+ = csect->alignment_power;
+ }
+ }
+
+ if (info->hash->creator == abfd->xvec)
+ {
+ int flag;
+
+ if (smtyp == XTY_ER || smtyp == XTY_CM)
+ flag = XCOFF_REF_REGULAR;
+ else
+ flag = XCOFF_DEF_REGULAR;
+ (*sym_hash)->flags |= flag;
+
+ if ((*sym_hash)->smclas == XMC_UA
+ || flag == XCOFF_DEF_REGULAR)
+ (*sym_hash)->smclas = aux.x_csect.x_smclas;
+ }
+ }
+
+ *csect_cache = csect;
+
+ esym += (sym.n_numaux + 1) * symesz;
+ sym_hash += sym.n_numaux + 1;
+ csect_cache += sym.n_numaux + 1;
+ }
+
+ BFD_ASSERT (last_real == NULL || last_real->next == first_csect);
+
+ /* Make sure that we have seen all the relocs. */
+ for (o = abfd->sections; o != first_csect; o = o->next)
+ {
+ /* Reset the section size and the line number count, since the
+ data is now attached to the csects. Don't reset the size of
+ the .debug section, since we need to read it below in
+ bfd_xcoff_size_dynamic_sections. */
+ if (strcmp (bfd_get_section_name (abfd, o), ".debug") != 0)
+ o->_raw_size = 0;
+ o->lineno_count = 0;
+
+ if ((o->flags & SEC_RELOC) != 0)
+ {
+ bfd_size_type i;
+ struct internal_reloc *rel;
+ asection **rel_csect;
+
+ rel = reloc_info[o->target_index].relocs;
+ rel_csect = reloc_info[o->target_index].csects;
+ for (i = 0; i < o->reloc_count; i++, rel++, rel_csect++)
+ {
+ if (*rel_csect == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: reloc %s:%d not in csect"),
+ bfd_get_filename (abfd), o->name, i);
+ bfd_set_error (bfd_error_bad_value);
+ goto error_return;
+ }
+
+ /* We identify all symbols which are called, so that we
+ can create glue code for calls to functions imported
+ from dynamic objects. */
+ if (info->hash->creator == abfd->xvec
+ && *rel_csect != bfd_und_section_ptr
+ && (rel->r_type == R_BR
+ || rel->r_type == R_RBR)
+ && obj_xcoff_sym_hashes (abfd)[rel->r_symndx] != NULL)
+ {
+ struct xcoff_link_hash_entry *h;
+
+ h = obj_xcoff_sym_hashes (abfd)[rel->r_symndx];
+ h->flags |= XCOFF_CALLED;
+ /* If the symbol name starts with a period, it is
+ the code of a function. If the symbol is
+ currently undefined, then add an undefined symbol
+ for the function descriptor. This should do no
+ harm, because any regular object that defines the
+ function should also define the function
+ descriptor. It helps, because it means that we
+ will identify the function descriptor with a
+ dynamic object if a dynamic object defines it. */
+ if (h->root.root.string[0] == '.'
+ && h->descriptor == NULL)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ h->root.root.string + 1,
+ true, false, true);
+ if (hds == NULL)
+ goto error_return;
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ if (! (_bfd_generic_link_add_one_symbol
+ (info, abfd, hds->root.root.string,
+ (flagword) 0, bfd_und_section_ptr,
+ (bfd_vma) 0, (const char *) NULL, false,
+ true,
+ (struct bfd_link_hash_entry **) &hds)))
+ goto error_return;
+ }
+ hds->flags |= XCOFF_DESCRIPTOR;
+ BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
+ && (h->flags & XCOFF_DESCRIPTOR) == 0);
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+ }
+ }
+
+ free (reloc_info[o->target_index].csects);
+ reloc_info[o->target_index].csects = NULL;
+
+ /* Reset SEC_RELOC and the reloc_count, since the reloc
+ information is now attached to the csects. */
+ o->flags &=~ SEC_RELOC;
+ o->reloc_count = 0;
+
+ /* If we are not keeping memory, free the reloc information. */
+ if (! info->keep_memory
+ && coff_section_data (abfd, o) != NULL
+ && coff_section_data (abfd, o)->relocs != NULL
+ && ! coff_section_data (abfd, o)->keep_relocs)
+ {
+ free (coff_section_data (abfd, o)->relocs);
+ coff_section_data (abfd, o)->relocs = NULL;
+ }
+ }
+
+ /* Free up the line numbers. FIXME: We could cache these
+ somewhere for the final link, to avoid reading them again. */
+ if (reloc_info[o->target_index].linenos != NULL)
+ {
+ free (reloc_info[o->target_index].linenos);
+ reloc_info[o->target_index].linenos = NULL;
+ }
+ }
+
+ free (reloc_info);
+
+ obj_coff_keep_syms (abfd) = keep_syms;
+
+ return true;
+
+ error_return:
+ if (reloc_info != NULL)
+ {
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (reloc_info[o->target_index].csects != NULL)
+ free (reloc_info[o->target_index].csects);
+ if (reloc_info[o->target_index].linenos != NULL)
+ free (reloc_info[o->target_index].linenos);
+ }
+ free (reloc_info);
+ }
+ obj_coff_keep_syms (abfd) = keep_syms;
+ return false;
+}
+
+#undef N_TMASK
+#undef N_BTSHFT
+
+/* This function is used to add symbols from a dynamic object to the
+ global symbol table. */
+
+static boolean
+xcoff_link_add_dynamic_symbols (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ asection *lsec;
+ bfd_byte *buf;
+ struct internal_ldhdr ldhdr;
+ const char *strings;
+ struct external_ldsym *elsym, *elsymend;
+ struct xcoff_import_file *n;
+ const char *bname;
+ const char *mname;
+ const char *s;
+ unsigned int c;
+ struct xcoff_import_file **pp;
+
+ /* We can only handle a dynamic object if we are generating an XCOFF
+ output file. */
+ if (info->hash->creator != abfd->xvec)
+ {
+ (*_bfd_error_handler)
+ (_("%s: XCOFF shared object when not producing XCOFF output"),
+ bfd_get_filename (abfd));
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ /* The symbols we use from a dynamic object are not the symbols in
+ the normal symbol table, but, rather, the symbols in the export
+ table. If there is a global symbol in a dynamic object which is
+ not in the export table, the loader will not be able to find it,
+ so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
+ libc.a has symbols in the export table which are not in the
+ symbol table. */
+
+ /* Read in the .loader section. FIXME: We should really use the
+ o_snloader field in the a.out header, rather than grabbing the
+ section by name. */
+ lsec = bfd_get_section_by_name (abfd, ".loader");
+ if (lsec == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: dynamic object with no .loader section"),
+ bfd_get_filename (abfd));
+ bfd_set_error (bfd_error_no_symbols);
+ return false;
+ }
+
+ if (! xcoff_get_section_contents (abfd, lsec))
+ return false;
+ buf = coff_section_data (abfd, lsec)->contents;
+
+ /* Remove the sections from this object, so that they do not get
+ included in the link. */
+ abfd->sections = NULL;
+
+ xcoff_swap_ldhdr_in (abfd, (struct external_ldhdr *) buf, &ldhdr);
+
+ strings = (char *) buf + ldhdr.l_stoff;
+
+ elsym = (struct external_ldsym *) (buf + LDHDRSZ);
+ elsymend = elsym + ldhdr.l_nsyms;
+ BFD_ASSERT (sizeof (struct external_ldsym) == LDSYMSZ);
+ for (; elsym < elsymend; elsym++)
+ {
+ struct internal_ldsym ldsym;
+ char nambuf[SYMNMLEN + 1];
+ const char *name;
+ struct xcoff_link_hash_entry *h;
+
+ xcoff_swap_ldsym_in (abfd, elsym, &ldsym);
+
+ /* We are only interested in exported symbols. */
+ if ((ldsym.l_smtype & L_EXPORT) == 0)
+ continue;
+
+ if (ldsym._l._l_l._l_zeroes == 0)
+ name = strings + ldsym._l._l_l._l_offset;
+ else
+ {
+ memcpy (nambuf, ldsym._l._l_name, SYMNMLEN);
+ nambuf[SYMNMLEN] = '\0';
+ name = nambuf;
+ }
+
+ /* Normally we could not call xcoff_link_hash_lookup in an add
+ symbols routine, since we might not be using an XCOFF hash
+ table. However, we verified above that we are using an XCOFF
+ hash table. */
+
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true,
+ true, true);
+ if (h == NULL)
+ return false;
+
+ h->flags |= XCOFF_DEF_DYNAMIC;
+
+ /* If the symbol is undefined, and the BFD it was found in is
+ not a dynamic object, change the BFD to this dynamic object,
+ so that we can get the correct import file ID. */
+ if ((h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && (h->root.u.undef.abfd == NULL
+ || (h->root.u.undef.abfd->flags & DYNAMIC) == 0))
+ h->root.u.undef.abfd = abfd;
+
+ if (h->root.type == bfd_link_hash_new)
+ {
+ h->root.type = bfd_link_hash_undefined;
+ h->root.u.undef.abfd = abfd;
+ /* We do not want to add this to the undefined symbol list. */
+ }
+
+ if (h->smclas == XMC_UA
+ || h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ h->smclas = ldsym.l_smclas;
+
+ /* Unless this is an XMC_XO symbol, we don't bother to actually
+ define it, since we don't have a section to put it in anyhow.
+ Instead, the relocation routines handle the DEF_DYNAMIC flag
+ correctly. */
+
+ if (h->smclas == XMC_XO
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ /* This symbol has an absolute value. */
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = ldsym.l_value;
+ }
+
+ /* If this symbol defines a function descriptor, then it
+ implicitly defines the function code as well. */
+ if (h->smclas == XMC_DS
+ || (h->smclas == XMC_XO && name[0] != '.'))
+ h->flags |= XCOFF_DESCRIPTOR;
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = h->descriptor;
+ if (hds == NULL)
+ {
+ char *dsnm;
+
+ dsnm = bfd_malloc (strlen (name) + 2);
+ if (dsnm == NULL)
+ return false;
+ dsnm[0] = '.';
+ strcpy (dsnm + 1, name);
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info), dsnm,
+ true, true, true);
+ free (dsnm);
+ if (hds == NULL)
+ return false;
+
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ hds->root.type = bfd_link_hash_undefined;
+ hds->root.u.undef.abfd = abfd;
+ /* We do not want to add this to the undefined
+ symbol list. */
+ }
+
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+
+ hds->flags |= XCOFF_DEF_DYNAMIC;
+ if (hds->smclas == XMC_UA)
+ hds->smclas = XMC_PR;
+
+ /* An absolute symbol appears to actually define code, not a
+ function descriptor. This is how some math functions are
+ implemented on AIX 4.1. */
+ if (h->smclas == XMC_XO
+ && (hds->root.type == bfd_link_hash_undefined
+ || hds->root.type == bfd_link_hash_undefweak))
+ {
+ hds->smclas = XMC_XO;
+ hds->root.type = bfd_link_hash_defined;
+ hds->root.u.def.section = bfd_abs_section_ptr;
+ hds->root.u.def.value = ldsym.l_value;
+ }
+ }
+ }
+
+ if (buf != NULL && ! coff_section_data (abfd, lsec)->keep_contents)
+ {
+ free (coff_section_data (abfd, lsec)->contents);
+ coff_section_data (abfd, lsec)->contents = NULL;
+ }
+
+ /* Record this file in the import files. */
+
+ n = ((struct xcoff_import_file *)
+ bfd_alloc (abfd, sizeof (struct xcoff_import_file)));
+ if (n == NULL)
+ return false;
+ n->next = NULL;
+
+ /* For some reason, the path entry in the import file list for a
+ shared object appears to always be empty. The file name is the
+ base name. */
+ n->path = "";
+ if (abfd->my_archive == NULL)
+ {
+ bname = bfd_get_filename (abfd);
+ mname = "";
+ }
+ else
+ {
+ bname = bfd_get_filename (abfd->my_archive);
+ mname = bfd_get_filename (abfd);
+ }
+ s = strrchr (bname, '/');
+ if (s != NULL)
+ bname = s + 1;
+ n->file = bname;
+ n->member = mname;
+
+ /* We start c at 1 because the first import file number is reserved
+ for LIBPATH. */
+ for (pp = &xcoff_hash_table (info)->imports, c = 1;
+ *pp != NULL;
+ pp = &(*pp)->next, ++c)
+ ;
+ *pp = n;
+
+ xcoff_data (abfd)->import_file_id = c;
+
+ return true;
+}
+\f
+/* Routines that are called after all the input files have been
+ handled, but before the sections are laid out in memory. */
+
+/* Mark a symbol as not being garbage, including the section in which
+ it is defined. */
+
+static INLINE boolean
+xcoff_mark_symbol (info, h)
+ struct bfd_link_info *info;
+ struct xcoff_link_hash_entry *h;
+{
+ if ((h->flags & XCOFF_MARK) != 0)
+ return true;
+
+ h->flags |= XCOFF_MARK;
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *hsec;
+
+ hsec = h->root.u.def.section;
+ if (! bfd_is_abs_section (hsec)
+ && (hsec->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, hsec))
+ return false;
+ }
+ }
+
+ if (h->toc_section != NULL
+ && (h->toc_section->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, h->toc_section))
+ return false;
+ }
+
+ return true;
+}
+
+/* The mark phase of garbage collection. For a given section, mark
+ it, and all the sections which define symbols to which it refers.
+ Because this function needs to look at the relocs, we also count
+ the number of relocs which need to be copied into the .loader
+ section. */
+
+static boolean
+xcoff_mark (info, sec)
+ struct bfd_link_info *info;
+ asection *sec;
+{
+ if (bfd_is_abs_section (sec)
+ || (sec->flags & SEC_MARK) != 0)
+ return true;
+
+ sec->flags |= SEC_MARK;
+
+ if (sec->owner->xvec == info->hash->creator
+ && coff_section_data (sec->owner, sec) != NULL
+ && xcoff_section_data (sec->owner, sec) != NULL)
+ {
+ register struct xcoff_link_hash_entry **hp, **hpend;
+ struct internal_reloc *rel, *relend;
+
+ /* Mark all the symbols in this section. */
+
+ hp = (obj_xcoff_sym_hashes (sec->owner)
+ + xcoff_section_data (sec->owner, sec)->first_symndx);
+ hpend = (obj_xcoff_sym_hashes (sec->owner)
+ + xcoff_section_data (sec->owner, sec)->last_symndx);
+ for (; hp < hpend; hp++)
+ {
+ register struct xcoff_link_hash_entry *h;
+
+ h = *hp;
+ if (h != NULL
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+ }
+ }
+
+ /* Look through the section relocs. */
+
+ if ((sec->flags & SEC_RELOC) != 0
+ && sec->reloc_count > 0)
+ {
+ rel = xcoff_read_internal_relocs (sec->owner, sec, true,
+ (bfd_byte *) NULL, false,
+ (struct internal_reloc *) NULL);
+ if (rel == NULL)
+ return false;
+ relend = rel + sec->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ asection *rsec;
+ struct xcoff_link_hash_entry *h;
+
+ if ((unsigned int) rel->r_symndx
+ > obj_raw_syment_count (sec->owner))
+ continue;
+
+ h = obj_xcoff_sym_hashes (sec->owner)[rel->r_symndx];
+ if (h != NULL
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+ }
+
+ rsec = xcoff_data (sec->owner)->csects[rel->r_symndx];
+ if (rsec != NULL
+ && (rsec->flags & SEC_MARK) == 0)
+ {
+ if (! xcoff_mark (info, rsec))
+ return false;
+ }
+
+ /* See if this reloc needs to be copied into the .loader
+ section. */
+ switch (rel->r_type)
+ {
+ default:
+ if (h == NULL
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common
+ || ((h->flags & XCOFF_CALLED) != 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && h->root.root.string[0] == '.'
+ && h->descriptor != NULL
+ && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
+ || ((h->descriptor->flags & XCOFF_IMPORT) != 0
+ && (h->descriptor->flags
+ & XCOFF_DEF_REGULAR) == 0))))
+ break;
+ /* Fall through. */
+ case R_POS:
+ case R_NEG:
+ case R_RL:
+ case R_RLA:
+ ++xcoff_hash_table (info)->ldrel_count;
+ if (h != NULL)
+ h->flags |= XCOFF_LDREL;
+ break;
+ case R_TOC:
+ case R_GL:
+ case R_TCL:
+ case R_TRL:
+ case R_TRLA:
+ /* We should never need a .loader reloc for a TOC
+ relative reloc. */
+ break;
+ }
+ }
+
+ if (! info->keep_memory
+ && coff_section_data (sec->owner, sec) != NULL
+ && coff_section_data (sec->owner, sec)->relocs != NULL
+ && ! coff_section_data (sec->owner, sec)->keep_relocs)
+ {
+ free (coff_section_data (sec->owner, sec)->relocs);
+ coff_section_data (sec->owner, sec)->relocs = NULL;
+ }
+ }
+ }
+
+ return true;
+}
+
+/* The sweep phase of garbage collection. Remove all garbage
+ sections. */
+
+static void
+xcoff_sweep (info)
+ struct bfd_link_info *info;
+{
+ bfd *sub;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *o;
+
+ for (o = sub->sections; o != NULL; o = o->next)
+ {
+ if ((o->flags & SEC_MARK) == 0)
+ {
+ /* Keep all sections from non-XCOFF input files. Keep
+ special sections. Keep .debug sections for the
+ moment. */
+ if (sub->xvec != info->hash->creator
+ || o == xcoff_hash_table (info)->debug_section
+ || o == xcoff_hash_table (info)->loader_section
+ || o == xcoff_hash_table (info)->linkage_section
+ || o == xcoff_hash_table (info)->toc_section
+ || o == xcoff_hash_table (info)->descriptor_section
+ || strcmp (o->name, ".debug") == 0)
+ o->flags |= SEC_MARK;
+ else
+ {
+ o->_raw_size = 0;
+ o->reloc_count = 0;
+ o->lineno_count = 0;
+ }
+ }
+ }
+ }
+}
+
+/* Record the number of elements in a set. This is used to output the
+ correct csect length. */
+
+boolean
+bfd_xcoff_link_record_set (output_bfd, info, harg, size)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ bfd_size_type size;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+ struct xcoff_link_size_list *n;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ /* This will hardly ever be called. I don't want to burn four bytes
+ per global symbol, so instead the size is kept on a linked list
+ attached to the hash table. */
+
+ n = ((struct xcoff_link_size_list *)
+ bfd_alloc (output_bfd, sizeof (struct xcoff_link_size_list)));
+ if (n == NULL)
+ return false;
+ n->next = xcoff_hash_table (info)->size_list;
+ n->h = h;
+ n->size = size;
+ xcoff_hash_table (info)->size_list = n;
+
+ h->flags |= XCOFF_HAS_SIZE;
+
+ return true;
+}
+
+/* Import a symbol. */
+
+boolean
+bfd_xcoff_import_symbol (output_bfd, info, harg, val, imppath, impfile,
+ impmember)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ bfd_vma val;
+ const char *imppath;
+ const char *impfile;
+ const char *impmember;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ /* A symbol name which starts with a period is the code for a
+ function. If the symbol is undefined, then add an undefined
+ symbol for the function descriptor, and import that instead. */
+ if (h->root.root.string[0] == '.'
+ && h->root.type == bfd_link_hash_undefined
+ && val == (bfd_vma) -1)
+ {
+ struct xcoff_link_hash_entry *hds;
+
+ hds = h->descriptor;
+ if (hds == NULL)
+ {
+ hds = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ h->root.root.string + 1,
+ true, false, true);
+ if (hds == NULL)
+ return false;
+ if (hds->root.type == bfd_link_hash_new)
+ {
+ hds->root.type = bfd_link_hash_undefined;
+ hds->root.u.undef.abfd = h->root.u.undef.abfd;
+ }
+ hds->flags |= XCOFF_DESCRIPTOR;
+ BFD_ASSERT ((hds->flags & XCOFF_CALLED) == 0
+ && (h->flags & XCOFF_DESCRIPTOR) == 0);
+ hds->descriptor = h;
+ h->descriptor = hds;
+ }
+
+ /* Now, if the descriptor is undefined, import the descriptor
+ rather than the symbol we were told to import. FIXME: Is
+ this correct in all cases? */
+ if (hds->root.type == bfd_link_hash_undefined)
+ h = hds;
+ }
+
+ h->flags |= XCOFF_IMPORT;
+
+ if (val != (bfd_vma) -1)
+ {
+ if (h->root.type == bfd_link_hash_defined
+ && (! bfd_is_abs_section (h->root.u.def.section)
+ || h->root.u.def.value != val))
+ {
+ if (! ((*info->callbacks->multiple_definition)
+ (info, h->root.root.string, h->root.u.def.section->owner,
+ h->root.u.def.section, h->root.u.def.value,
+ output_bfd, bfd_abs_section_ptr, val)))
+ return false;
+ }
+
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = val;
+ }
+
+ /* We overload the ldindx field to hold the l_ifile value for this
+ symbol. */
+ BFD_ASSERT (h->ldsym == NULL);
+ BFD_ASSERT ((h->flags & XCOFF_BUILT_LDSYM) == 0);
+ if (imppath == NULL)
+ h->ldindx = -1;
+ else
+ {
+ unsigned int c;
+ struct xcoff_import_file **pp;
+
+ /* We start c at 1 because the first entry in the import list is
+ reserved for the library search path. */
+ for (pp = &xcoff_hash_table (info)->imports, c = 1;
+ *pp != NULL;
+ pp = &(*pp)->next, ++c)
+ {
+ if (strcmp ((*pp)->path, imppath) == 0
+ && strcmp ((*pp)->file, impfile) == 0
+ && strcmp ((*pp)->member, impmember) == 0)
+ break;
+ }
+
+ if (*pp == NULL)
+ {
+ struct xcoff_import_file *n;
- BFD_ASSERT (section != NULL);
+ n = ((struct xcoff_import_file *)
+ bfd_alloc (output_bfd, sizeof (struct xcoff_import_file)));
+ if (n == NULL)
+ return false;
+ n->next = NULL;
+ n->path = imppath;
+ n->file = impfile;
+ n->member = impmember;
+ *pp = n;
+ }
- /* We must copy the name into memory if we got it from the
- syment itself, rather than the string table. */
- copy = default_copy;
- if (sym._n._n_n._n_zeroes != 0
- || sym._n._n_n._n_offset == 0)
- copy = true;
+ h->ldindx = c;
+ }
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, name, flags, section, value,
- (const char *) NULL, copy, false,
- (struct bfd_link_hash_entry **) sym_hash)))
- goto error_return;
+ return true;
+}
- if (info->hash->creator == abfd->xvec)
- (*sym_hash)->xcoff = true;
+/* Export a symbol. */
+
+boolean
+bfd_xcoff_export_symbol (output_bfd, info, harg, syscall)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ struct bfd_link_hash_entry *harg;
+ boolean syscall ATTRIBUTE_UNUSED;
+{
+ struct xcoff_link_hash_entry *h = (struct xcoff_link_hash_entry *) harg;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h->flags |= XCOFF_EXPORT;
+
+ /* FIXME: I'm not at all sure what syscall is supposed to mean, so
+ I'm just going to ignore it until somebody explains it. */
+
+ /* See if this is a function descriptor. It may be one even though
+ it is not so marked. */
+ if ((h->flags & XCOFF_DESCRIPTOR) == 0
+ && h->root.root.string[0] != '.')
+ {
+ char *fnname;
+ struct xcoff_link_hash_entry *hfn;
+
+ fnname = (char *) bfd_malloc (strlen (h->root.root.string) + 2);
+ if (fnname == NULL)
+ return false;
+ fnname[0] = '.';
+ strcpy (fnname + 1, h->root.root.string);
+ hfn = xcoff_link_hash_lookup (xcoff_hash_table (info),
+ fnname, false, false, true);
+ free (fnname);
+ if (hfn != NULL
+ && hfn->smclas == XMC_PR
+ && (hfn->root.type == bfd_link_hash_defined
+ || hfn->root.type == bfd_link_hash_defweak))
+ {
+ h->flags |= XCOFF_DESCRIPTOR;
+ h->descriptor = hfn;
+ hfn->descriptor = h;
}
+ }
- *csect_cache = csect;
+ /* Make sure we don't garbage collect this symbol. */
+ if (! xcoff_mark_symbol (info, h))
+ return false;
- esym += (sym.n_numaux + 1) * symesz;
- sym_hash += sym.n_numaux + 1;
- csect_cache += sym.n_numaux + 1;
- if (debug_index != NULL)
- debug_index += sym.n_numaux + 1;
+ /* If this is a function descriptor, make sure we don't garbage
+ collect the associated function code. We normally don't have to
+ worry about this, because the descriptor will be attached to a
+ section with relocs, but if we are creating the descriptor
+ ourselves those relocs will not be visible to the mark code. */
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0)
+ {
+ if (! xcoff_mark_symbol (info, h->descriptor))
+ return false;
}
- if (new_debug)
+ return true;
+}
+
+/* Count a reloc against a symbol. This is called for relocs
+ generated by the linker script, typically for global constructors
+ and destructors. */
+
+boolean
+bfd_xcoff_link_count_reloc (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct xcoff_link_hash_entry *h;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (output_bfd, info, name, false, false,
+ false));
+ if (h == NULL)
{
- /* Update the size of the .debug section we are building. */
- if (xcoff_hash_table (info)->debug_section == NULL)
- {
- asection *n;
+ (*_bfd_error_handler) (_("%s: no such symbol"), name);
+ bfd_set_error (bfd_error_no_symbols);
+ return false;
+ }
- n = bfd_make_section_anyway (abfd, ".debug");
- if (n == NULL)
- goto error_return;
- n->flags |= SEC_HAS_CONTENTS;
- /* Note that reading from this section will fail. */
- xcoff_hash_table (info)->debug_section = n;
- }
- xcoff_hash_table (info)->debug_section->_raw_size =
- _bfd_stringtab_size (xcoff_hash_table (info)->debug_strtab);
+ h->flags |= XCOFF_REF_REGULAR | XCOFF_LDREL;
+ ++xcoff_hash_table (info)->ldrel_count;
+
+ /* Mark the symbol to avoid garbage collection. */
+ if (! xcoff_mark_symbol (info, h))
+ return false;
+
+ return true;
+}
+
+/* This function is called for each symbol to which the linker script
+ assigns a value. */
+
+boolean
+bfd_xcoff_record_link_assignment (output_bfd, info, name)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *name;
+{
+ struct xcoff_link_hash_entry *h;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ return true;
+
+ h = xcoff_link_hash_lookup (xcoff_hash_table (info), name, true, true,
+ false);
+ if (h == NULL)
+ return false;
+
+ h->flags |= XCOFF_DEF_REGULAR;
+
+ return true;
+}
+
+/* This structure is used to pass information through
+ xcoff_link_hash_traverse. */
+
+struct xcoff_loader_info
+{
+ /* Set if a problem occurred. */
+ boolean failed;
+ /* Output BFD. */
+ bfd *output_bfd;
+ /* Link information structure. */
+ struct bfd_link_info *info;
+ /* Whether all defined symbols should be exported. */
+ boolean export_defineds;
+ /* Number of ldsym structures. */
+ size_t ldsym_count;
+ /* Size of string table. */
+ size_t string_size;
+ /* String table. */
+ bfd_byte *strings;
+ /* Allocated size of string table. */
+ size_t string_alc;
+};
+
+/* Build the .loader section. This is called by the XCOFF linker
+ emulation before_allocation routine. We must set the size of the
+ .loader section before the linker lays out the output file.
+ LIBPATH is the library path to search for shared objects; this is
+ normally built from the -L arguments passed to the linker. ENTRY
+ is the name of the entry point symbol (the -e linker option).
+ FILE_ALIGN is the alignment to use for sections within the file
+ (the -H linker option). MAXSTACK is the maximum stack size (the
+ -bmaxstack linker option). MAXDATA is the maximum data size (the
+ -bmaxdata linker option). GC is whether to do garbage collection
+ (the -bgc linker option). MODTYPE is the module type (the
+ -bmodtype linker option). TEXTRO is whether the text section must
+ be read only (the -btextro linker option). EXPORT_DEFINEDS is
+ whether all defined symbols should be exported (the -unix linker
+ option). SPECIAL_SECTIONS is set by this routine to csects with
+ magic names like _end. */
+
+boolean
+bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
+ file_align, maxstack, maxdata, gc,
+ modtype, textro, export_defineds,
+ special_sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ const char *libpath;
+ const char *entry;
+ unsigned long file_align;
+ unsigned long maxstack;
+ unsigned long maxdata;
+ boolean gc;
+ int modtype;
+ boolean textro;
+ boolean export_defineds;
+ asection **special_sections;
+{
+ struct xcoff_link_hash_entry *hentry;
+ asection *lsec;
+ struct xcoff_loader_info ldinfo;
+ int i;
+ size_t impsize, impcount;
+ struct xcoff_import_file *fl;
+ struct internal_ldhdr *ldhdr;
+ bfd_size_type stoff;
+ register char *out;
+ asection *sec;
+ bfd *sub;
+ struct bfd_strtab_hash *debug_strtab;
+ bfd_byte *debug_contents = NULL;
+
+ if (! XCOFF_XVECP (output_bfd->xvec))
+ {
+ for (i = 0; i < 6; i++)
+ special_sections[i] = NULL;
+ return true;
}
- /* Make sure that we have seen all the relocs. */
- for (sub = abfd->sections; sub != first_csect; sub = sub->next)
+ ldinfo.failed = false;
+ ldinfo.output_bfd = output_bfd;
+ ldinfo.info = info;
+ ldinfo.export_defineds = export_defineds;
+ ldinfo.ldsym_count = 0;
+ ldinfo.string_size = 0;
+ ldinfo.strings = NULL;
+ ldinfo.string_alc = 0;
+
+ xcoff_data (output_bfd)->maxstack = maxstack;
+ xcoff_data (output_bfd)->maxdata = maxdata;
+ xcoff_data (output_bfd)->modtype = modtype;
+
+ xcoff_hash_table (info)->file_align = file_align;
+ xcoff_hash_table (info)->textro = textro;
+
+ if (entry == NULL)
+ hentry = NULL;
+ else
{
- /* Reset the section size, since the data is now attached to the
- csects. */
- sub->_raw_size = 0;
+ hentry = xcoff_link_hash_lookup (xcoff_hash_table (info), entry,
+ false, false, true);
+ if (hentry != NULL)
+ hentry->flags |= XCOFF_ENTRY;
+ }
+
+ /* Garbage collect unused sections. */
+ if (info->relocateable
+ || ! gc
+ || hentry == NULL
+ || (hentry->root.type != bfd_link_hash_defined
+ && hentry->root.type != bfd_link_hash_defweak))
+ {
+ gc = false;
+ xcoff_hash_table (info)->gc = false;
- if ((sub->flags & SEC_RELOC) != 0)
+ /* We still need to call xcoff_mark, in order to set ldrel_count
+ correctly. */
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
{
- bfd_size_type i;
+ asection *o;
- for (i = 0; i < sub->reloc_count; i++)
+ for (o = sub->sections; o != NULL; o = o->next)
{
- if (! reloc_info[sub->target_index].used[i])
+ if ((o->flags & SEC_MARK) == 0)
{
- (*_bfd_error_handler)
- ("%s: reloc %s:%d not in csect",
- bfd_get_filename (abfd), sub->name, i);
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
+ if (! xcoff_mark (info, o))
+ goto error_return;
}
}
+ }
+ }
+ else
+ {
+ if (! xcoff_mark (info, hentry->root.u.def.section))
+ goto error_return;
+ xcoff_sweep (info);
+ xcoff_hash_table (info)->gc = true;
+ }
- free (reloc_info[sub->target_index].used);
- reloc_info[sub->target_index].used = NULL;
+ /* Return special sections to the caller. */
+ for (i = 0; i < 6; i++)
+ {
+ asection *sec;
+
+ sec = xcoff_hash_table (info)->special_sections[i];
+ if (sec != NULL
+ && gc
+ && (sec->flags & SEC_MARK) == 0)
+ sec = NULL;
+ special_sections[i] = sec;
+ }
- /* Reset SEC_RELOC and the reloc_count, since the reloc
- information is now attached to the csects. */
- sub->flags &=~ SEC_RELOC;
- sub->reloc_count = 0;
+ if (info->input_bfds == NULL)
+ {
+ /* I'm not sure what to do in this bizarre case. */
+ return true;
+ }
- /* If we are not keeping memory, free the reloc information. */
- if (! info->keep_memory
- && coff_section_data (abfd, sub) != NULL
- && coff_section_data (abfd, sub)->relocs != NULL)
- {
- free (coff_section_data (abfd, sub)->relocs);
- coff_section_data (abfd, sub)->relocs = NULL;
- }
- }
+ xcoff_link_hash_traverse (xcoff_hash_table (info), xcoff_build_ldsyms,
+ (PTR) &ldinfo);
+ if (ldinfo.failed)
+ goto error_return;
+
+ /* Work out the size of the import file names. Each import file ID
+ consists of three null terminated strings: the path, the file
+ name, and the archive member name. The first entry in the list
+ of names is the path to use to find objects, which the linker has
+ passed in as the libpath argument. For some reason, the path
+ entry in the other import file names appears to always be empty. */
+ impsize = strlen (libpath) + 3;
+ impcount = 1;
+ for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
+ {
+ ++impcount;
+ impsize += (strlen (fl->path)
+ + strlen (fl->file)
+ + strlen (fl->member)
+ + 3);
}
- free (reloc_info);
+ /* Set up the .loader section header. */
+ ldhdr = &xcoff_hash_table (info)->ldhdr;
+ ldhdr->l_version = 1;
+ ldhdr->l_nsyms = ldinfo.ldsym_count;
+ ldhdr->l_nreloc = xcoff_hash_table (info)->ldrel_count;
+ ldhdr->l_istlen = impsize;
+ ldhdr->l_nimpid = impcount;
+ ldhdr->l_impoff = (LDHDRSZ
+ + ldhdr->l_nsyms * LDSYMSZ
+ + ldhdr->l_nreloc * LDRELSZ);
+ ldhdr->l_stlen = ldinfo.string_size;
+ stoff = ldhdr->l_impoff + impsize;
+ if (ldinfo.string_size == 0)
+ ldhdr->l_stoff = 0;
+ else
+ ldhdr->l_stoff = stoff;
+
+ /* We now know the final size of the .loader section. Allocate
+ space for it. */
+ lsec = xcoff_hash_table (info)->loader_section;
+ lsec->_raw_size = stoff + ldhdr->l_stlen;
+ lsec->contents = (bfd_byte *) bfd_zalloc (output_bfd, lsec->_raw_size);
+ if (lsec->contents == NULL)
+ goto error_return;
- if (debug_contents != NULL)
+ /* Set up the header. */
+ xcoff_swap_ldhdr_out (output_bfd, ldhdr,
+ (struct external_ldhdr *) lsec->contents);
+
+ /* Set up the import file names. */
+ out = (char *) lsec->contents + ldhdr->l_impoff;
+ strcpy (out, libpath);
+ out += strlen (libpath) + 1;
+ *out++ = '\0';
+ *out++ = '\0';
+ for (fl = xcoff_hash_table (info)->imports; fl != NULL; fl = fl->next)
+ {
+ register const char *s;
+
+ s = fl->path;
+ while ((*out++ = *s++) != '\0')
+ ;
+ s = fl->file;
+ while ((*out++ = *s++) != '\0')
+ ;
+ s = fl->member;
+ while ((*out++ = *s++) != '\0')
+ ;
+ }
+
+ BFD_ASSERT ((bfd_size_type) ((bfd_byte *) out - lsec->contents) == stoff);
+
+ /* Set up the symbol string table. */
+ if (ldinfo.string_size > 0)
+ {
+ memcpy (out, ldinfo.strings, ldinfo.string_size);
+ free (ldinfo.strings);
+ ldinfo.strings = NULL;
+ }
+
+ /* We can't set up the symbol table or the relocs yet, because we
+ don't yet know the final position of the various sections. The
+ .loader symbols are written out when the corresponding normal
+ symbols are written out in xcoff_link_input_bfd or
+ xcoff_write_global_symbol. The .loader relocs are written out
+ when the corresponding normal relocs are handled in
+ xcoff_link_input_bfd. */
+
+ /* Allocate space for the magic sections. */
+ sec = xcoff_hash_table (info)->linkage_section;
+ if (sec->_raw_size > 0)
+ {
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+ sec = xcoff_hash_table (info)->toc_section;
+ if (sec->_raw_size > 0)
+ {
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+ sec = xcoff_hash_table (info)->descriptor_section;
+ if (sec->_raw_size > 0)
{
+ sec->contents = (bfd_byte *) bfd_zalloc (output_bfd, sec->_raw_size);
+ if (sec->contents == NULL)
+ goto error_return;
+ }
+
+ /* Now that we've done garbage collection, figure out the contents
+ of the .debug section. */
+ debug_strtab = xcoff_hash_table (info)->debug_strtab;
+
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ {
+ asection *subdeb;
+ bfd_size_type symcount;
+ unsigned long *debug_index;
+ asection **csectpp;
+ bfd_byte *esym, *esymend;
+ bfd_size_type symesz;
+
+ if (sub->xvec != info->hash->creator)
+ continue;
+ subdeb = bfd_get_section_by_name (sub, ".debug");
+ if (subdeb == NULL || subdeb->_raw_size == 0)
+ continue;
+
+ if (info->strip == strip_all
+ || info->strip == strip_debugger
+ || info->discard == discard_all)
+ {
+ subdeb->_raw_size = 0;
+ continue;
+ }
+
+ if (! _bfd_coff_get_external_symbols (sub))
+ goto error_return;
+
+ symcount = obj_raw_syment_count (sub);
+ debug_index = ((unsigned long *)
+ bfd_zalloc (sub, symcount * sizeof (unsigned long)));
+ if (debug_index == NULL)
+ goto error_return;
+ xcoff_data (sub)->debug_indices = debug_index;
+
+ /* Grab the contents of the .debug section. We use malloc and
+ copy the names into the debug stringtab, rather than
+ bfd_alloc, because I expect that, when linking many files
+ together, many of the strings will be the same. Storing the
+ strings in the hash table should save space in this case. */
+ debug_contents = (bfd_byte *) bfd_malloc (subdeb->_raw_size);
+ if (debug_contents == NULL)
+ goto error_return;
+ if (! bfd_get_section_contents (sub, subdeb, (PTR) debug_contents,
+ (file_ptr) 0, subdeb->_raw_size))
+ goto error_return;
+
+ csectpp = xcoff_data (sub)->csects;
+
+ symesz = bfd_coff_symesz (sub);
+ esym = (bfd_byte *) obj_coff_external_syms (sub);
+ esymend = esym + symcount * symesz;
+ while (esym < esymend)
+ {
+ struct internal_syment sym;
+
+ bfd_coff_swap_sym_in (sub, (PTR) esym, (PTR) &sym);
+
+ *debug_index = (unsigned long) -1;
+
+ if (sym._n._n_n._n_zeroes == 0
+ && *csectpp != NULL
+ && (! gc
+ || ((*csectpp)->flags & SEC_MARK) != 0
+ || *csectpp == bfd_abs_section_ptr)
+ && bfd_coff_symname_in_debug (sub, &sym))
+ {
+ char *name;
+ bfd_size_type indx;
+
+ name = (char *) debug_contents + sym._n._n_n._n_offset;
+ indx = _bfd_stringtab_add (debug_strtab, name, true, true);
+ if (indx == (bfd_size_type) -1)
+ goto error_return;
+ *debug_index = indx;
+ }
+
+ esym += (sym.n_numaux + 1) * symesz;
+ csectpp += sym.n_numaux + 1;
+ debug_index += sym.n_numaux + 1;
+ }
+
free (debug_contents);
debug_contents = NULL;
+
+ /* Clear the size of subdeb, so that it is not included directly
+ in the output file. */
+ subdeb->_raw_size = 0;
+
+ if (! info->keep_memory)
+ {
+ if (! _bfd_coff_free_symbols (sub))
+ goto error_return;
+ }
}
+ if (info->strip != strip_all)
+ xcoff_hash_table (info)->debug_section->_raw_size =
+ _bfd_stringtab_size (debug_strtab);
+
return true;
error_return:
+ if (ldinfo.strings != NULL)
+ free (ldinfo.strings);
if (debug_contents != NULL)
free (debug_contents);
- if (reloc_info != NULL)
+ return false;
+}
+
+/* Add a symbol to the .loader symbols, if necessary. */
+
+static boolean
+xcoff_build_ldsyms (h, p)
+ struct xcoff_link_hash_entry *h;
+ PTR p;
+{
+ struct xcoff_loader_info *ldinfo = (struct xcoff_loader_info *) p;
+ size_t len;
+
+ /* If this is a final link, and the symbol was defined as a common
+ symbol in a regular object file, and there was no definition in
+ any dynamic object, then the linker will have allocated space for
+ the symbol in a common section but the XCOFF_DEF_REGULAR flag
+ will not have been set. */
+ if (h->root.type == bfd_link_hash_defined
+ && (h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_REF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (bfd_is_abs_section (h->root.u.def.section)
+ || (h->root.u.def.section->owner->flags & DYNAMIC) == 0))
+ h->flags |= XCOFF_DEF_REGULAR;
+
+ /* If all defined symbols should be exported, mark them now. We
+ don't want to export the actual functions, just the function
+ descriptors. */
+ if (ldinfo->export_defineds
+ && (h->flags & XCOFF_DEF_REGULAR) != 0
+ && h->root.root.string[0] != '.')
{
- for (sub = abfd->sections; sub != NULL; sub = sub->next)
+ boolean export;
+
+ /* We don't export a symbol which is being defined by an object
+ included from an archive which contains a shared object. The
+ rationale is that if an archive contains both an unshared and
+ a shared object, then there must be some reason that the
+ unshared object is unshared, and we don't want to start
+ providing a shared version of it. In particular, this solves
+ a bug involving the _savefNN set of functions. gcc will call
+ those functions without providing a slot to restore the TOC,
+ so it is essential that these functions be linked in directly
+ and not from a shared object, which means that a shared
+ object which also happens to link them in must not export
+ them. This is confusing, but I haven't been able to think of
+ a different approach. Note that the symbols can, of course,
+ be exported explicitly. */
+ export = true;
+ if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->root.u.def.section->owner != NULL
+ && h->root.u.def.section->owner->my_archive != NULL)
{
- if (reloc_info[sub->target_index].used != NULL)
- free (reloc_info[sub->target_index].used);
+ bfd *arbfd, *member;
+
+ arbfd = h->root.u.def.section->owner->my_archive;
+ member = bfd_openr_next_archived_file (arbfd, (bfd *) NULL);
+ while (member != NULL)
+ {
+ if ((member->flags & DYNAMIC) != 0)
+ {
+ export = false;
+ break;
+ }
+ member = bfd_openr_next_archived_file (arbfd, member);
+ }
}
- free (reloc_info);
+
+ if (export)
+ h->flags |= XCOFF_EXPORT;
}
- return false;
+
+ /* We don't want to garbage collect symbols which are not defined in
+ XCOFF files. This is a convenient place to mark them. */
+ if (xcoff_hash_table (ldinfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && (h->root.u.def.section->owner == NULL
+ || (h->root.u.def.section->owner->xvec
+ != ldinfo->info->hash->creator)))
+ h->flags |= XCOFF_MARK;
+
+ /* If this symbol is called and defined in a dynamic object, or it
+ is imported, then we need to set up global linkage code for it.
+ (Unless we did garbage collection and we didn't need this
+ symbol.) */
+ if ((h->flags & XCOFF_CALLED) != 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ && h->root.root.string[0] == '.'
+ && h->descriptor != NULL
+ && ((h->descriptor->flags & XCOFF_DEF_DYNAMIC) != 0
+ || ((h->descriptor->flags & XCOFF_IMPORT) != 0
+ && (h->descriptor->flags & XCOFF_DEF_REGULAR) == 0))
+ && (! xcoff_hash_table (ldinfo->info)->gc
+ || (h->flags & XCOFF_MARK) != 0))
+ {
+ asection *sec;
+ struct xcoff_link_hash_entry *hds;
+
+ sec = xcoff_hash_table (ldinfo->info)->linkage_section;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = sec;
+ h->root.u.def.value = sec->_raw_size;
+ h->smclas = XMC_GL;
+ h->flags |= XCOFF_DEF_REGULAR;
+ sec->_raw_size += XCOFF_GLINK_SIZE;
+
+ /* The global linkage code requires a TOC entry for the
+ descriptor. */
+ hds = h->descriptor;
+ BFD_ASSERT ((hds->root.type == bfd_link_hash_undefined
+ || hds->root.type == bfd_link_hash_undefweak)
+ && (hds->flags & XCOFF_DEF_REGULAR) == 0);
+ hds->flags |= XCOFF_MARK;
+ if (hds->toc_section == NULL)
+ {
+ hds->toc_section = xcoff_hash_table (ldinfo->info)->toc_section;
+ hds->u.toc_offset = hds->toc_section->_raw_size;
+ hds->toc_section->_raw_size += 4;
+ ++xcoff_hash_table (ldinfo->info)->ldrel_count;
+ ++hds->toc_section->reloc_count;
+ hds->indx = -2;
+ hds->flags |= XCOFF_SET_TOC | XCOFF_LDREL;
+
+ /* We need to call xcoff_build_ldsyms recursively here,
+ because we may already have passed hds on the traversal. */
+ xcoff_build_ldsyms (hds, p);
+ }
+ }
+
+ /* If this symbol is exported, but not defined, we need to try to
+ define it. */
+ if ((h->flags & XCOFF_EXPORT) != 0
+ && (h->flags & XCOFF_IMPORT) == 0
+ && (h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak))
+ {
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0
+ && (h->descriptor->root.type == bfd_link_hash_defined
+ || h->descriptor->root.type == bfd_link_hash_defweak))
+ {
+ asection *sec;
+
+ /* This is an undefined function descriptor associated with
+ a defined entry point. We can build up a function
+ descriptor ourselves. Believe it or not, the AIX linker
+ actually does this, and there are cases where we need to
+ do it as well. */
+ sec = xcoff_hash_table (ldinfo->info)->descriptor_section;
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = sec;
+ h->root.u.def.value = sec->_raw_size;
+ h->smclas = XMC_DS;
+ h->flags |= XCOFF_DEF_REGULAR;
+ sec->_raw_size += 12;
+
+ /* A function descriptor uses two relocs: one for the
+ associated code, and one for the TOC address. */
+ xcoff_hash_table (ldinfo->info)->ldrel_count += 2;
+ sec->reloc_count += 2;
+
+ /* We handle writing out the contents of the descriptor in
+ xcoff_write_global_symbol. */
+ }
+ else
+ {
+ (*_bfd_error_handler)
+ (_("warning: attempt to export undefined symbol `%s'"),
+ h->root.root.string);
+ h->ldsym = NULL;
+ return true;
+ }
+ }
+
+ /* If this is still a common symbol, and it wasn't garbage
+ collected, we need to actually allocate space for it in the .bss
+ section. */
+ if (h->root.type == bfd_link_hash_common
+ && (! xcoff_hash_table (ldinfo->info)->gc
+ || (h->flags & XCOFF_MARK) != 0)
+ && h->root.u.c.p->section->_raw_size == 0)
+ {
+ BFD_ASSERT (bfd_is_com_section (h->root.u.c.p->section));
+ h->root.u.c.p->section->_raw_size = h->root.u.c.size;
+ }
+
+ /* We need to add a symbol to the .loader section if it is mentioned
+ in a reloc which we are copying to the .loader section and it was
+ not defined or common, or if it is the entry point, or if it is
+ being exported. */
+
+ if (((h->flags & XCOFF_LDREL) == 0
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common)
+ && (h->flags & XCOFF_ENTRY) == 0
+ && (h->flags & XCOFF_EXPORT) == 0)
+ {
+ h->ldsym = NULL;
+ return true;
+ }
+
+ /* We don't need to add this symbol if we did garbage collection and
+ we did not mark this symbol. */
+ if (xcoff_hash_table (ldinfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0)
+ {
+ h->ldsym = NULL;
+ return true;
+ }
+
+ /* We may have already processed this symbol due to the recursive
+ call above. */
+ if ((h->flags & XCOFF_BUILT_LDSYM) != 0)
+ return true;
+
+ /* We need to add this symbol to the .loader symbols. */
+
+ BFD_ASSERT (h->ldsym == NULL);
+ h->ldsym = ((struct internal_ldsym *)
+ bfd_zalloc (ldinfo->output_bfd,
+ sizeof (struct internal_ldsym)));
+ if (h->ldsym == NULL)
+ {
+ ldinfo->failed = true;
+ return false;
+ }
+
+ if ((h->flags & XCOFF_IMPORT) != 0)
+ h->ldsym->l_ifile = h->ldindx;
+
+ /* The first 3 symbol table indices are reserved to indicate the
+ sections. */
+ h->ldindx = ldinfo->ldsym_count + 3;
+
+ ++ldinfo->ldsym_count;
+
+ len = strlen (h->root.root.string);
+ if (len <= SYMNMLEN)
+ strncpy (h->ldsym->_l._l_name, h->root.root.string, SYMNMLEN);
+ else
+ {
+ if (ldinfo->string_size + len + 3 > ldinfo->string_alc)
+ {
+ size_t newalc;
+ bfd_byte *newstrings;
+
+ newalc = ldinfo->string_alc * 2;
+ if (newalc == 0)
+ newalc = 32;
+ while (ldinfo->string_size + len + 3 > newalc)
+ newalc *= 2;
+
+ newstrings = ((bfd_byte *)
+ bfd_realloc ((PTR) ldinfo->strings, newalc));
+ if (newstrings == NULL)
+ {
+ ldinfo->failed = true;
+ return false;
+ }
+ ldinfo->string_alc = newalc;
+ ldinfo->strings = newstrings;
+ }
+
+ bfd_put_16 (ldinfo->output_bfd, len + 1,
+ ldinfo->strings + ldinfo->string_size);
+ strcpy (ldinfo->strings + ldinfo->string_size + 2, h->root.root.string);
+ h->ldsym->_l._l_l._l_zeroes = 0;
+ h->ldsym->_l._l_l._l_offset = ldinfo->string_size + 2;
+ ldinfo->string_size += len + 3;
+ }
+
+ h->flags |= XCOFF_BUILT_LDSYM;
+
+ return true;
}
\f
/* Do the final link step. */
bfd_byte *external_relocs = NULL;
char strbuf[STRING_SIZE_SIZE];
+ if (info->shared)
+ abfd->flags |= DYNAMIC;
+
symesz = bfd_coff_symesz (abfd);
finfo.info = info;
finfo.contents = NULL;
finfo.external_relocs = NULL;
+ finfo.ldsym = ((struct external_ldsym *)
+ (xcoff_hash_table (info)->loader_section->contents
+ + LDHDRSZ));
+ finfo.ldrel = ((struct external_ldrel *)
+ (xcoff_hash_table (info)->loader_section->contents
+ + LDHDRSZ
+ + xcoff_hash_table (info)->ldhdr.l_nsyms * LDSYMSZ));
+
xcoff_data (abfd)->coff.link_info = info;
finfo.strtab = _bfd_stringtab_init ();
if (finfo.strtab == NULL)
- goto error_return;
-
- /* Compute the file positions for all the sections. */
- if (! abfd->output_has_begun)
- bfd_coff_compute_section_file_positions (abfd);
+ goto error_return;
- /* Count the line numbers and relocation entries required for the
- output file. Set the file positions for the relocs. */
- rel_filepos = obj_relocbase (abfd);
- relsz = bfd_coff_relsz (abfd);
+ /* Count the line number and relocation entries required for the
+ output file. Determine a few maximum sizes. */
max_contents_size = 0;
max_lineno_count = 0;
max_reloc_count = 0;
sec = p->u.indirect.section;
+ /* Mark all sections which are to be included in the
+ link. This will normally be every section. We need
+ to do this so that we can identify any sections which
+ the linker has decided to not include. */
+ sec->linker_mark = true;
+
if (info->strip == strip_none
|| info->strip == strip_some)
o->lineno_count += sec->lineno_count;
max_contents_size = sec->_raw_size;
if (sec->lineno_count > max_lineno_count)
max_lineno_count = sec->lineno_count;
+ if (coff_section_data (sec->owner, sec) != NULL
+ && xcoff_section_data (sec->owner, sec) != NULL
+ && (xcoff_section_data (sec->owner, sec)->lineno_count
+ > max_lineno_count))
+ max_lineno_count =
+ xcoff_section_data (sec->owner, sec)->lineno_count;
if (sec->reloc_count > max_reloc_count)
max_reloc_count = sec->reloc_count;
}
|| p->type == bfd_symbol_reloc_link_order)
++o->reloc_count;
}
- if (o->reloc_count == 0)
- o->rel_filepos = 0;
- else
+ }
+
+ /* Compute the file positions for all the sections. */
+ if (abfd->output_has_begun)
+ {
+ if (xcoff_hash_table (info)->file_align != 0)
+ abort ();
+ }
+ else
+ {
+ bfd_vma file_align;
+
+ file_align = xcoff_hash_table (info)->file_align;
+ if (file_align != 0)
{
- o->flags |= SEC_RELOC;
- o->rel_filepos = rel_filepos;
- rel_filepos += o->reloc_count * relsz;
+ boolean saw_contents;
+ int indx;
+ asection **op;
+ file_ptr sofar;
+
+ /* Insert .pad sections before every section which has
+ contents and is loaded, if it is preceded by some other
+ section which has contents and is loaded. */
+ saw_contents = true;
+ for (op = &abfd->sections; *op != NULL; op = &(*op)->next)
+ {
+ if (strcmp ((*op)->name, ".pad") == 0)
+ saw_contents = false;
+ else if (((*op)->flags & SEC_HAS_CONTENTS) != 0
+ && ((*op)->flags & SEC_LOAD) != 0)
+ {
+ if (! saw_contents)
+ saw_contents = true;
+ else
+ {
+ asection *n, *hold;
+
+ hold = *op;
+ *op = NULL;
+ n = bfd_make_section_anyway (abfd, ".pad");
+ BFD_ASSERT (*op == n);
+ n->next = hold;
+ n->flags = SEC_HAS_CONTENTS;
+ n->alignment_power = 0;
+ saw_contents = false;
+ }
+ }
+ }
+
+ /* Reset the section indices after inserting the new
+ sections. */
+ indx = 0;
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ ++indx;
+ o->target_index = indx;
+ }
+ BFD_ASSERT ((unsigned int) indx == abfd->section_count);
+
+ /* Work out appropriate sizes for the .pad sections to force
+ each section to land on a page boundary. This bit of
+ code knows what compute_section_file_positions is going
+ to do. */
+ sofar = bfd_coff_filhsz (abfd);
+ sofar += bfd_coff_aoutsz (abfd);
+ sofar += abfd->section_count * bfd_coff_scnhsz (abfd);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ if (o->reloc_count >= 0xffff || o->lineno_count >= 0xffff)
+ sofar += bfd_coff_scnhsz (abfd);
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (strcmp (o->name, ".pad") == 0)
+ {
+ bfd_vma pageoff;
+
+ BFD_ASSERT (o->_raw_size == 0);
+ pageoff = sofar & (file_align - 1);
+ if (pageoff != 0)
+ {
+ o->_raw_size = file_align - pageoff;
+ sofar += file_align - pageoff;
+ o->flags |= SEC_HAS_CONTENTS;
+ }
+ }
+ else
+ {
+ if ((o->flags & SEC_HAS_CONTENTS) != 0)
+ sofar += BFD_ALIGN (o->_raw_size,
+ 1 << o->alignment_power);
+ }
+ }
}
+
+ if (! bfd_coff_compute_section_file_positions (abfd))
+ goto error_return;
}
/* Allocate space for the pointers we need to keep for the relocs. */
/* We use section_count + 1, rather than section_count, because
the target_index fields are 1 based. */
- finfo.section_info = ((struct xcoff_link_section_info *)
- malloc ((abfd->section_count + 1)
- * sizeof (struct xcoff_link_section_info)));
+ finfo.section_info =
+ ((struct xcoff_link_section_info *)
+ bfd_malloc ((abfd->section_count + 1)
+ * sizeof (struct xcoff_link_section_info)));
if (finfo.section_info == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
for (i = 0; i <= abfd->section_count; i++)
{
finfo.section_info[i].relocs = NULL;
finfo.section_info[i].rel_hashes = NULL;
+ finfo.section_info[i].toc_rel_hashes = NULL;
}
}
- /* We now know the size of the relocs, so we can determine the file
- positions of the line numbers. */
- line_filepos = rel_filepos;
- linesz = bfd_coff_linesz (abfd);
+ /* Set the file positions for the relocs. */
+ rel_filepos = obj_relocbase (abfd);
+ relsz = bfd_coff_relsz (abfd);
max_output_reloc_count = 0;
for (o = abfd->sections; o != NULL; o = o->next)
{
- if (o->lineno_count == 0)
- o->line_filepos = 0;
+ if (o->reloc_count == 0)
+ o->rel_filepos = 0;
else
{
- o->line_filepos = line_filepos;
- line_filepos += o->lineno_count * linesz;
- }
+ /* A stripped file has no relocs. However, we still
+ allocate the buffers, so that later code doesn't have to
+ worry about whether we are stripping or not. */
+ if (info->strip == strip_all)
+ o->rel_filepos = 0;
+ else
+ {
+ o->flags |= SEC_RELOC;
+ o->rel_filepos = rel_filepos;
+ rel_filepos += o->reloc_count * relsz;
+ }
- if (o->reloc_count != 0)
- {
/* We don't know the indices of global symbols until we have
written out all the local symbols. For each section in
the output file, we keep an array of pointers to hash
would be slow. */
finfo.section_info[o->target_index].relocs =
((struct internal_reloc *)
- malloc (o->reloc_count * sizeof (struct internal_reloc)));
+ bfd_malloc (o->reloc_count * sizeof (struct internal_reloc)));
finfo.section_info[o->target_index].rel_hashes =
((struct xcoff_link_hash_entry **)
- malloc (o->reloc_count
+ bfd_malloc (o->reloc_count
* sizeof (struct xcoff_link_hash_entry *)));
if (finfo.section_info[o->target_index].relocs == NULL
|| finfo.section_info[o->target_index].rel_hashes == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
if (o->reloc_count > max_output_reloc_count)
max_output_reloc_count = o->reloc_count;
}
+ }
+
+ /* We now know the size of the relocs, so we can determine the file
+ positions of the line numbers. */
+ line_filepos = rel_filepos;
+ finfo.line_filepos = line_filepos;
+ linesz = bfd_coff_linesz (abfd);
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ if (o->lineno_count == 0)
+ o->line_filepos = 0;
+ else
+ {
+ o->line_filepos = line_filepos;
+ line_filepos += o->lineno_count * linesz;
+ }
/* Reset the reloc and lineno counts, so that we can use them to
count the number of entries we have output so far. */
/* Figure out the largest number of symbols in an input BFD. Take
the opportunity to clear the output_has_begun fields of all the
- input BFD's. We want at least 4 symbols, since that is the
+ input BFD's. We want at least 6 symbols, since that is the
number which xcoff_write_global_symbol may need. */
- max_sym_count = 4;
+ max_sym_count = 6;
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
{
size_t sz;
/* Allocate some buffers used while linking. */
finfo.internal_syms = ((struct internal_syment *)
- malloc (max_sym_count
- * sizeof (struct internal_syment)));
- finfo.sym_indices = (long *) malloc (max_sym_count * sizeof (long));
+ bfd_malloc (max_sym_count
+ * sizeof (struct internal_syment)));
+ finfo.sym_indices = (long *) bfd_malloc (max_sym_count * sizeof (long));
finfo.outsyms = ((bfd_byte *)
- malloc ((size_t) ((max_sym_count + 1) * symesz)));
- finfo.linenos = (bfd_byte *) malloc (max_lineno_count
- * bfd_coff_linesz (abfd));
- finfo.contents = (bfd_byte *) malloc (max_contents_size);
- finfo.external_relocs = (bfd_byte *) malloc (max_reloc_count * relsz);
+ bfd_malloc ((size_t) ((max_sym_count + 1) * symesz)));
+ finfo.linenos = (bfd_byte *) bfd_malloc (max_lineno_count
+ * bfd_coff_linesz (abfd));
+ finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
+ finfo.external_relocs = (bfd_byte *) bfd_malloc (max_reloc_count * relsz);
if ((finfo.internal_syms == NULL && max_sym_count > 0)
|| (finfo.sym_indices == NULL && max_sym_count > 0)
|| finfo.outsyms == NULL
|| (finfo.linenos == NULL && max_lineno_count > 0)
|| (finfo.contents == NULL && max_contents_size > 0)
|| (finfo.external_relocs == NULL && max_reloc_count > 0))
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
obj_raw_syment_count (abfd) = 0;
xcoff_data (abfd)->toc = (bfd_vma) -1;
- /* Write out all the global symbols which do not come from XCOFF
- input files. In COFF these must come at the end, but in XCOFF it
- doesn't seem to matter. */
- xcoff_link_hash_traverse (xcoff_hash_table (info),
- xcoff_write_global_symbol,
- (PTR) &finfo);
-
/* We now know the position of everything in the file, except that
we don't know the size of the symbol table and therefore we don't
know where the string table starts. We just build the string
goto error_return;
}
+ /* Write out all the global symbols which do not come from XCOFF
+ input files. */
+ xcoff_link_hash_traverse (xcoff_hash_table (info),
+ xcoff_write_global_symbol,
+ (PTR) &finfo);
+
if (finfo.outsyms != NULL)
{
free (finfo.outsyms);
/* Now that we have written out all the global symbols, we know the
symbol indices to use for relocs against them, and we can finally
write out the relocs. */
- external_relocs = (bfd_byte *) malloc (max_output_reloc_count * relsz);
+ external_relocs = (bfd_byte *) bfd_malloc (max_output_reloc_count * relsz);
if (external_relocs == NULL && max_output_reloc_count != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
+ goto error_return;
for (o = abfd->sections; o != NULL; o = o->next)
{
struct internal_reloc *irel;
struct internal_reloc *irelend;
struct xcoff_link_hash_entry **rel_hash;
+ struct xcoff_toc_rel_hash *toc_rel_hash;
bfd_byte *erel;
+ /* A stripped file has no relocs. */
+ if (info->strip == strip_all)
+ {
+ o->reloc_count = 0;
+ continue;
+ }
+
if (o->reloc_count == 0)
continue;
- /* XCOFF requires that the relocs be sorted by address. We tend
- to produce them in the order in which their containing csects
- appear in the symbol table, which is not necessarily by
- address. So we sort them here. There may be a better way to
- do this. */
- qsort ((PTR) finfo.section_info[o->target_index].relocs,
- o->reloc_count, sizeof (struct internal_reloc),
- xcoff_sort_relocs);
-
irel = finfo.section_info[o->target_index].relocs;
irelend = irel + o->reloc_count;
rel_hash = finfo.section_info[o->target_index].rel_hashes;
- erel = external_relocs;
for (; irel < irelend; irel++, rel_hash++, erel += relsz)
{
if (*rel_hash != NULL)
if ((*rel_hash)->indx < 0)
{
if (! ((*info->callbacks->unattached_reloc)
- (info, (*rel_hash)->root.root.string, abfd, o,
- irel->r_vaddr)))
+ (info, (*rel_hash)->root.root.string,
+ (bfd *) NULL, o, irel->r_vaddr)))
goto error_return;
(*rel_hash)->indx = 0;
}
irel->r_symndx = (*rel_hash)->indx;
}
- bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
}
+ for (toc_rel_hash = finfo.section_info[o->target_index].toc_rel_hashes;
+ toc_rel_hash != NULL;
+ toc_rel_hash = toc_rel_hash->next)
+ {
+ if (toc_rel_hash->h->u.toc_indx < 0)
+ {
+ if (! ((*info->callbacks->unattached_reloc)
+ (info, toc_rel_hash->h->root.root.string,
+ (bfd *) NULL, o, toc_rel_hash->rel->r_vaddr)))
+ goto error_return;
+ toc_rel_hash->h->u.toc_indx = 0;
+ }
+ toc_rel_hash->rel->r_symndx = toc_rel_hash->h->u.toc_indx;
+ }
+
+ /* XCOFF requires that the relocs be sorted by address. We tend
+ to produce them in the order in which their containing csects
+ appear in the symbol table, which is not necessarily by
+ address. So we sort them here. There may be a better way to
+ do this. */
+ qsort ((PTR) finfo.section_info[o->target_index].relocs,
+ o->reloc_count, sizeof (struct internal_reloc),
+ xcoff_sort_relocs);
+
+ irel = finfo.section_info[o->target_index].relocs;
+ irelend = irel + o->reloc_count;
+ erel = external_relocs;
+ for (; irel < irelend; irel++, rel_hash++, erel += relsz)
+ bfd_coff_swap_reloc_out (abfd, (PTR) irel, (PTR) erel);
+
if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0
|| bfd_write ((PTR) external_relocs, relsz, o->reloc_count,
abfd) != relsz * o->reloc_count)
finfo.section_info = NULL;
}
+ /* Write out the loader section contents. */
+ BFD_ASSERT ((bfd_byte *) finfo.ldrel
+ == (xcoff_hash_table (info)->loader_section->contents
+ + xcoff_hash_table (info)->ldhdr.l_impoff));
+ o = xcoff_hash_table (info)->loader_section;
+ if (! bfd_set_section_contents (abfd, o->output_section,
+ o->contents, o->output_offset,
+ o->_raw_size))
+ goto error_return;
+
+ /* Write out the magic sections. */
+ o = xcoff_hash_table (info)->linkage_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+ o = xcoff_hash_table (info)->toc_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+ o = xcoff_hash_table (info)->descriptor_section;
+ if (o->_raw_size > 0
+ && ! bfd_set_section_contents (abfd, o->output_section, o->contents,
+ o->output_offset, o->_raw_size))
+ goto error_return;
+
/* Write out the string table. */
if (bfd_seek (abfd,
(obj_sym_filepos (abfd)
bfd_size_type linesz;
bfd_byte *esym;
bfd_byte *esym_end;
+ struct xcoff_link_hash_entry **sym_hash;
struct internal_syment *isymp;
asection **csectpp;
unsigned long *debug_index;
long *indexp;
unsigned long output_index;
bfd_byte *outsym;
- struct xcoff_link_hash_entry **sym_hash;
+ unsigned int incls;
+ asection *oline;
boolean keep_syms;
asection *o;
+ /* We can just skip DYNAMIC files, unless this is a static link. */
+ if ((input_bfd->flags & DYNAMIC) != 0
+ && ! finfo->info->static_link)
+ return true;
+
/* Move all the symbols to the output file. */
output_bfd = finfo->output_bfd;
indexp = finfo->sym_indices;
output_index = syment_base;
outsym = finfo->outsyms;
+ incls = 0;
+ oline = NULL;
while (esym < esym_end)
{
the symbol. */
isym = *isymp;
+ /* If this symbol is in the .loader section, swap out the
+ .loader symbol information. If this is an external symbol
+ reference to a defined symbol, though, then wait until we get
+ to the definition. */
+ if (isym.n_sclass == C_EXT
+ && *sym_hash != NULL
+ && (*sym_hash)->ldsym != NULL
+ && (smtyp != XTY_ER
+ || (*sym_hash)->root.type == bfd_link_hash_undefined))
+ {
+ struct xcoff_link_hash_entry *h;
+ struct internal_ldsym *ldsym;
+
+ h = *sym_hash;
+ ldsym = h->ldsym;
+ if (isym.n_scnum > 0)
+ {
+ ldsym->l_scnum = (*csectpp)->output_section->target_index;
+ ldsym->l_value = (isym.n_value
+ + (*csectpp)->output_section->vma
+ + (*csectpp)->output_offset
+ - (*csectpp)->vma);
+ }
+ else
+ {
+ ldsym->l_scnum = isym.n_scnum;
+ ldsym->l_value = isym.n_value;
+ }
+
+ ldsym->l_smtype = smtyp;
+ if (((h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_IMPORT) != 0)
+ ldsym->l_smtype |= L_IMPORT;
+ if (((h->flags & XCOFF_DEF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_EXPORT) != 0)
+ ldsym->l_smtype |= L_EXPORT;
+ if ((h->flags & XCOFF_ENTRY) != 0)
+ ldsym->l_smtype |= L_ENTRY;
+
+ ldsym->l_smclas = aux.x_csect.x_smclas;
+
+ if (ldsym->l_ifile == (bfd_size_type) -1)
+ ldsym->l_ifile = 0;
+ else if (ldsym->l_ifile == 0)
+ {
+ if ((ldsym->l_smtype & L_IMPORT) == 0)
+ ldsym->l_ifile = 0;
+ else
+ {
+ bfd *impbfd;
+
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ impbfd = h->root.u.def.section->owner;
+ else if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ impbfd = h->root.u.undef.abfd;
+ else
+ impbfd = NULL;
+
+ if (impbfd == NULL)
+ ldsym->l_ifile = 0;
+ else
+ {
+ BFD_ASSERT (impbfd->xvec == finfo->output_bfd->xvec);
+ ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
+ }
+ }
+ }
+
+ ldsym->l_parm = 0;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
+ xcoff_swap_ldsym_out (finfo->output_bfd, ldsym,
+ finfo->ldsym + h->ldindx - 3);
+ h->ldsym = NULL;
+
+ /* Fill in snentry now that we know the target_index. */
+ if ((h->flags & XCOFF_ENTRY) != 0
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ xcoff_data (output_bfd)->snentry =
+ h->root.u.def.section->output_section->target_index;
+ }
+
*indexp = -1;
skip = false;
if (*csectpp == NULL)
skip = true;
+ /* If we garbage collected this csect, we want to skip this
+ symbol. */
+ if (! skip
+ && xcoff_hash_table (finfo->info)->gc
+ && ((*csectpp)->flags & SEC_MARK) == 0
+ && *csectpp != bfd_abs_section_ptr)
+ skip = true;
+
/* An XCOFF linker always skips C_STAT symbols. */
if (! skip
&& isymp->n_sclass == C_STAT)
skip = true;
else
{
+ bfd_vma tocval, tocend;
+
+ tocval = ((*csectpp)->output_section->vma
+ + (*csectpp)->output_offset
+ + isym.n_value
+ - (*csectpp)->vma);
+ /* We want to find out if tocval is a good value to use
+ as the TOC anchor--that is, whether we can access all
+ of the TOC using a 16 bit offset from tocval. This
+ test assumes that the TOC comes at the end of the
+ output section, as it does in the default linker
+ script. FIXME: This doesn't handle .tocbss sections
+ created from XMC_TD common symbols correctly. */
+
+ tocend = ((*csectpp)->output_section->vma
+ + (*csectpp)->output_section->_raw_size);
+
+ if (tocval + 0x10000 < tocend)
+ {
+ (*_bfd_error_handler)
+ (_("TOC overflow: 0x%lx > 0x10000; try -mminimal-toc when compiling"),
+ (unsigned long) (tocend - tocval));
+ bfd_set_error (bfd_error_file_too_big);
+ return false;
+ }
+
+ if (tocval + 0x8000 < tocend)
+ {
+ bfd_vma tocadd;
+
+ tocadd = tocend - (tocval + 0x8000);
+ tocval += tocadd;
+ isym.n_value += tocadd;
+ }
+
finfo->toc_symindx = output_index;
- xcoff_data (finfo->output_bfd)->toc =
- ((*csectpp)->output_section->vma
- + (*csectpp)->output_offset
- + isym.n_value
- - (*csectpp)->vma);
+ xcoff_data (finfo->output_bfd)->toc = tocval;
+ xcoff_data (finfo->output_bfd)->sntoc =
+ (*csectpp)->output_section->target_index;
require = true;
}
}
&& (*sym_hash)->root.type != bfd_link_hash_undefined)
skip = true;
+ /* We can skip common symbols if they got defined somewhere
+ else. */
+ if (! skip
+ && isym.n_sclass == C_EXT
+ && smtyp == XTY_CM
+ && ((*sym_hash)->root.type != bfd_link_hash_common
+ || (*sym_hash)->root.u.c.p->section != *csectpp)
+ && ((*sym_hash)->root.type != bfd_link_hash_defined
+ || (*sym_hash)->root.u.def.section != *csectpp))
+ skip = true;
+
/* Skip local symbols if we are discarding them. */
if (! skip
&& finfo->info->discard == discard_all
&& (isym.n_sclass != C_EXT
&& (isym.n_sclass != C_HIDEXT
|| smtyp != XTY_SD))
- && strncmp (name, finfo->info->lprefix,
- finfo->info->lprefix_len) == 0))
+ && bfd_is_local_label_name (input_bfd, name)))
skip = true;
}
- /* On the other hand, we can't skip global symbols which have
- relocs against them. FIXME: This won't always work, because
- we're not always outputting the global symbols at the end, as
- we do for COFF. */
- if (skip
- && *sym_hash != NULL
- && (*sym_hash)->indx == -2
- && finfo->info->strip != strip_all)
- skip = false;
-
/* We can not skip the first TOC anchor. */
if (skip
&& require
}
}
- if (isym.n_sclass == C_BSTAT)
- {
- unsigned long indx;
-
- /* The value of a C_BSTAT symbol is the symbol table
- index of the containing csect. */
-
- indx = isym.n_value;
- if (indx < obj_raw_syment_count (input_bfd))
- {
- long symindx;
-
- symindx = finfo->sym_indices[indx];
- if (symindx < 0)
- isym.n_value = 0;
- else
- isym.n_value = symindx;
- }
- }
- else if (isym.n_scnum > 0)
+ if (isym.n_sclass != C_BSTAT
+ && isym.n_sclass != C_ESTAT
+ && isym.n_sclass != C_DECL
+ && isym.n_scnum > 0)
{
isym.n_scnum = (*csectpp)->output_section->target_index;
isym.n_value += ((*csectpp)->output_section->vma
finfo->last_file = isym;
}
+ /* The value of a C_BINCL or C_EINCL symbol is a file offset
+ into the line numbers. We update the symbol values when
+ we handle the line numbers. */
+ if (isym.n_sclass == C_BINCL
+ || isym.n_sclass == C_EINCL)
+ {
+ isym.n_value = finfo->line_filepos;
+ ++incls;
+ }
+
/* Output the symbol. */
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
h->indx = output_index;
}
+ /* If this is a symbol in the TOC which we may have merged
+ (class XMC_TC), remember the symbol index of the TOC
+ symbol. */
+ if (isym.n_sclass == C_HIDEXT
+ && aux.x_csect.x_smclas == XMC_TC
+ && *sym_hash != NULL)
+ {
+ BFD_ASSERT (((*sym_hash)->flags & XCOFF_SET_TOC) == 0);
+ BFD_ASSERT ((*sym_hash)->toc_section != NULL);
+ (*sym_hash)->u.toc_indx = output_index;
+ }
+
output_index += add;
outsym += add * osymesz;
}
*indexp++ = -1;
}
- /* Fix up the aux entries. This must be done in a separate pass,
- because we don't know the correct symbol indices until we have
- already decided which symbols we are going to keep. */
+ /* Fix up the aux entries and the C_BSTAT symbols. This must be
+ done in a separate pass, because we don't know the correct symbol
+ indices until we have already decided which symbols we are going
+ to keep. */
esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
isymp = finfo->internal_syms;
indexp = finfo->sym_indices;
+ csectpp = xcoff_data (input_bfd)->csects;
outsym = finfo->outsyms;
while (esym < esym_end)
{
{
int i;
+ if (isymp->n_sclass == C_BSTAT)
+ {
+ struct internal_syment isym;
+ unsigned long indx;
+
+ /* The value of a C_BSTAT symbol is the symbol table
+ index of the containing csect. */
+ bfd_coff_swap_sym_in (output_bfd, (PTR) outsym, (PTR) &isym);
+ indx = isym.n_value;
+ if (indx < obj_raw_syment_count (input_bfd))
+ {
+ long symindx;
+
+ symindx = finfo->sym_indices[indx];
+ if (symindx < 0)
+ isym.n_value = 0;
+ else
+ isym.n_value = symindx;
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &isym,
+ (PTR) outsym);
+ }
+ }
+
esym += isymesz;
outsym += osymesz;
if (ISFCN (isymp->n_type)
|| ISTAG (isymp->n_sclass)
- || isymp->n_sclass == C_BLOCK)
+ || isymp->n_sclass == C_BLOCK
+ || isymp->n_sclass == C_FCN)
{
indx = aux.x_sym.x_fcnary.x_fcn.x_endndx.l;
if (indx > 0
}
}
- bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
- isymp->n_sclass, i, isymp->n_numaux,
- (PTR) outsym);
- outsym += osymesz;
- esym += isymesz;
- }
- }
-
- indexp += add;
- isymp += add;
- }
-
- /* Relocate the line numbers, unless we are stripping them. */
- if (finfo->info->strip == strip_none
- || finfo->info->strip == strip_some)
- {
- for (o = input_bfd->sections; o != NULL; o = o->next)
- {
- bfd_vma offset;
- bfd_byte *eline;
- bfd_byte *elineend;
-
- /* FIXME: If SEC_HAS_CONTENTS is not set for the section,
- then build_link_order in ldwrite.c will not have created
- a link order, which means that we will not have seen this
- input section in _bfd_xcoff_final_link, which means that
- we will not have allocated space for the line numbers of
- this section. I don't think line numbers can be
- meaningful for a section which does not have
- SEC_HAS_CONTENTS set, but, if they do, this must be
- changed. */
- if (o->lineno_count == 0
- || (o->output_section->flags & SEC_HAS_CONTENTS) == 0)
- continue;
-
- if (bfd_seek (input_bfd, o->line_filepos, SEEK_SET) != 0
- || bfd_read (finfo->linenos, linesz, o->lineno_count,
- input_bfd) != linesz * o->lineno_count)
- return false;
-
- offset = o->output_section->vma + o->output_offset - o->vma;
- eline = finfo->linenos;
- elineend = eline + linesz * o->lineno_count;
- for (; eline < elineend; eline += linesz)
- {
- struct internal_lineno iline;
-
- bfd_coff_swap_lineno_in (input_bfd, (PTR) eline, (PTR) &iline);
-
- if (iline.l_lnno != 0)
- iline.l_addr.l_paddr += offset;
- else if (iline.l_addr.l_symndx >= 0
- && ((unsigned long) iline.l_addr.l_symndx
- < obj_raw_syment_count (input_bfd)))
+ /* Copy over the line numbers, unless we are stripping
+ them. We do this on a symbol by symbol basis in
+ order to more easily handle garbage collection. */
+ if ((isymp->n_sclass == C_EXT
+ || isymp->n_sclass == C_HIDEXT)
+ && i == 0
+ && isymp->n_numaux > 1
+ && ISFCN (isymp->n_type)
+ && aux.x_sym.x_fcnary.x_fcn.x_lnnoptr != 0)
{
- long indx;
-
- indx = finfo->sym_indices[iline.l_addr.l_symndx];
-
- if (indx < 0)
- {
- /* These line numbers are attached to a symbol
- which we are stripping. We should really
- just discard the line numbers, but that would
- be a pain because we have already counted
- them. */
- indx = 0;
- }
+ if (finfo->info->strip != strip_none
+ && finfo->info->strip != strip_some)
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
else
{
- struct internal_syment is;
- union internal_auxent ia;
-
- /* Fix up the lnnoptr field in the aux entry of
- the symbol. It turns out that we can't do
- this when we modify the symbol aux entries,
- because gas sometimes screws up the lnnoptr
- field and makes it an offset from the start
- of the line numbers rather than an absolute
- file index. */
- bfd_coff_swap_sym_in (output_bfd,
- (PTR) (finfo->outsyms
- + ((indx - syment_base)
- * osymesz)),
- (PTR) &is);
- if ((ISFCN (is.n_type)
- || is.n_sclass == C_BLOCK)
- && ((is.n_sclass == C_EXT
- || is.n_sclass == C_HIDEXT)
- ? is.n_numaux >= 2
- : is.n_numaux >= 1))
+ asection *enclosing;
+ unsigned int enc_count;
+ bfd_size_type linoff;
+ struct internal_lineno lin;
+
+ o = *csectpp;
+ enclosing = xcoff_section_data (abfd, o)->enclosing;
+ enc_count = xcoff_section_data (abfd, o)->lineno_count;
+ if (oline != enclosing)
+ {
+ if (bfd_seek (input_bfd,
+ enclosing->line_filepos,
+ SEEK_SET) != 0
+ || (bfd_read (finfo->linenos, linesz,
+ enc_count, input_bfd)
+ != linesz * enc_count))
+ return false;
+ oline = enclosing;
+ }
+
+ linoff = (aux.x_sym.x_fcnary.x_fcn.x_lnnoptr
+ - enclosing->line_filepos);
+
+ bfd_coff_swap_lineno_in (input_bfd,
+ (PTR) (finfo->linenos + linoff),
+ (PTR) &lin);
+ if (lin.l_lnno != 0
+ || ((bfd_size_type) lin.l_addr.l_symndx
+ != ((esym
+ - isymesz
+ - ((bfd_byte *)
+ obj_coff_external_syms (input_bfd)))
+ / isymesz)))
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr = 0;
+ else
{
- PTR auxptr;
-
- auxptr = (PTR) (finfo->outsyms
- + ((indx - syment_base + 1)
- * osymesz));
- bfd_coff_swap_aux_in (output_bfd, auxptr,
- is.n_type, is.n_sclass,
- 0, is.n_numaux, (PTR) &ia);
- ia.x_sym.x_fcnary.x_fcn.x_lnnoptr =
+ bfd_byte *linpend, *linp;
+ bfd_vma offset;
+ bfd_size_type count;
+
+ lin.l_addr.l_symndx = *indexp;
+ bfd_coff_swap_lineno_out (output_bfd, (PTR) &lin,
+ (PTR) (finfo->linenos
+ + linoff));
+
+ linpend = (finfo->linenos
+ + enc_count * linesz);
+ offset = (o->output_section->vma
+ + o->output_offset
+ - o->vma);
+ for (linp = finfo->linenos + linoff + linesz;
+ linp < linpend;
+ linp += linesz)
+ {
+ bfd_coff_swap_lineno_in (input_bfd, (PTR) linp,
+ (PTR) &lin);
+ if (lin.l_lnno == 0)
+ break;
+ lin.l_addr.l_paddr += offset;
+ bfd_coff_swap_lineno_out (output_bfd,
+ (PTR) &lin,
+ (PTR) linp);
+ }
+
+ count = (linp - (finfo->linenos + linoff)) / linesz;
+
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr =
(o->output_section->line_filepos
- + o->output_section->lineno_count * linesz
- + eline - finfo->linenos);
- bfd_coff_swap_aux_out (output_bfd, (PTR) &ia,
- is.n_type, is.n_sclass, 0,
- is.n_numaux, auxptr);
+ + o->output_section->lineno_count * linesz);
+
+ if (bfd_seek (output_bfd,
+ aux.x_sym.x_fcnary.x_fcn.x_lnnoptr,
+ SEEK_SET) != 0
+ || (bfd_write (finfo->linenos + linoff,
+ linesz, count, output_bfd)
+ != linesz * count))
+ return false;
+
+ o->output_section->lineno_count += count;
+
+ if (incls > 0)
+ {
+ struct internal_syment *iisp, *iispend;
+ long *iindp;
+ bfd_byte *oos;
+ int iiadd;
+
+ /* Update any C_BINCL or C_EINCL symbols
+ that refer to a line number in the
+ range we just output. */
+ iisp = finfo->internal_syms;
+ iispend = (iisp
+ + obj_raw_syment_count (input_bfd));
+ iindp = finfo->sym_indices;
+ oos = finfo->outsyms;
+ while (iisp < iispend)
+ {
+ if (*iindp >= 0
+ && (iisp->n_sclass == C_BINCL
+ || iisp->n_sclass == C_EINCL)
+ && ((bfd_size_type) iisp->n_value
+ >= enclosing->line_filepos + linoff)
+ && ((bfd_size_type) iisp->n_value
+ < (enclosing->line_filepos
+ + enc_count * linesz)))
+ {
+ struct internal_syment iis;
+
+ bfd_coff_swap_sym_in (output_bfd,
+ (PTR) oos,
+ (PTR) &iis);
+ iis.n_value =
+ (iisp->n_value
+ - enclosing->line_filepos
+ - linoff
+ + aux.x_sym.x_fcnary.x_fcn.x_lnnoptr);
+ bfd_coff_swap_sym_out (output_bfd,
+ (PTR) &iis,
+ (PTR) oos);
+ --incls;
+ }
+
+ iiadd = 1 + iisp->n_numaux;
+ if (*iindp >= 0)
+ oos += iiadd * osymesz;
+ iisp += iiadd;
+ iindp += iiadd;
+ }
+ }
}
}
-
- iline.l_addr.l_symndx = indx;
}
- bfd_coff_swap_lineno_out (output_bfd, (PTR) &iline, (PTR) eline);
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, isymp->n_type,
+ isymp->n_sclass, i, isymp->n_numaux,
+ (PTR) outsym);
+ outsym += osymesz;
+ esym += isymesz;
}
-
- if (bfd_seek (output_bfd,
- (o->output_section->line_filepos
- + o->output_section->lineno_count * linesz),
- SEEK_SET) != 0
- || bfd_write (finfo->linenos, linesz, o->lineno_count,
- output_bfd) != linesz * o->lineno_count)
- return false;
-
- o->output_section->lineno_count += o->lineno_count;
}
+
+ indexp += add;
+ isymp += add;
+ csectpp += add;
}
/* If we swapped out a C_FILE symbol, guess that the next C_FILE
{
bfd_byte *contents;
+ if (! o->linker_mark)
+ {
+ /* This section was omitted from the link. */
+ continue;
+ }
+
if ((o->flags & SEC_HAS_CONTENTS) == 0
- || o->_raw_size == 0)
+ || o->_raw_size == 0
+ || (o->flags & SEC_IN_MEMORY) != 0)
continue;
/* We have set filepos correctly for the sections we created to
bfd_vma offset;
struct internal_reloc *irelend;
struct xcoff_link_hash_entry **rel_hash;
+ long r_symndx;
- /* Read in the relocs. We have set rel_filepos correctly
- for the sections we created to represent csects, so this
- should work. */
+ /* Read in the relocs. */
target_index = o->output_section->target_index;
- internal_relocs = (_bfd_coff_read_internal_relocs
+ internal_relocs = (xcoff_read_internal_relocs
(input_bfd, o, false, finfo->external_relocs,
true,
(finfo->section_info[target_index].relocs
+ o->output_section->reloc_count);
for (; irel < irelend; irel++, rel_hash++)
{
- struct xcoff_link_hash_entry *h;
+ struct xcoff_link_hash_entry *h = NULL;
+ struct internal_ldrel ldrel;
+ boolean quiet;
*rel_hash = NULL;
irel->r_vaddr += offset;
- if (irel->r_symndx == -1)
- continue;
+ r_symndx = irel->r_symndx;
+
+ if (r_symndx == -1)
+ h = NULL;
+ else
+ h = obj_xcoff_sym_hashes (input_bfd)[r_symndx];
- h = obj_xcoff_sym_hashes (input_bfd)[irel->r_symndx];
- if (h != NULL)
+ if (r_symndx != -1 && finfo->info->strip != strip_all)
{
- /* This is a global symbol. */
- if (h->indx >= 0)
- irel->r_symndx = h->indx;
+ if (h != NULL
+ && h->smclas != XMC_TD
+ && (irel->r_type == R_TOC
+ || irel->r_type == R_GL
+ || irel->r_type == R_TCL
+ || irel->r_type == R_TRL
+ || irel->r_type == R_TRLA))
+ {
+ /* This is a TOC relative reloc with a symbol
+ attached. The symbol should be the one which
+ this reloc is for. We want to make this
+ reloc against the TOC address of the symbol,
+ not the symbol itself. */
+ BFD_ASSERT (h->toc_section != NULL);
+ BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
+ if (h->u.toc_indx != -1)
+ irel->r_symndx = h->u.toc_indx;
+ else
+ {
+ struct xcoff_toc_rel_hash *n;
+ struct xcoff_link_section_info *si;
+
+ n = ((struct xcoff_toc_rel_hash *)
+ bfd_alloc (finfo->output_bfd,
+ sizeof (struct xcoff_toc_rel_hash)));
+ if (n == NULL)
+ return false;
+ si = finfo->section_info + target_index;
+ n->next = si->toc_rel_hashes;
+ n->h = h;
+ n->rel = irel;
+ si->toc_rel_hashes = n;
+ }
+ }
+ else if (h != NULL)
+ {
+ /* This is a global symbol. */
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
+ {
+ /* This symbol is being written at the end
+ of the file, and we do not yet know the
+ symbol index. We save the pointer to the
+ hash table entry in the rel_hash list.
+ We set the indx field to -2 to indicate
+ that this symbol must not be stripped. */
+ *rel_hash = h;
+ h->indx = -2;
+ }
+ }
else
{
- /* This symbol is being written at the end of
- the file, and we do not yet know the symbol
- index. We save the pointer to the hash table
- entry in the rel_hash list. We set the indx
- field to -2 to indicate that this symbol must
- not be stripped. */
- *rel_hash = h;
- h->indx = -2;
+ long indx;
+
+ indx = finfo->sym_indices[r_symndx];
+
+ if (indx == -1)
+ {
+ struct internal_syment *is;
+
+ /* Relocations against a TC0 TOC anchor are
+ automatically transformed to be against
+ the TOC anchor in the output file. */
+ is = finfo->internal_syms + r_symndx;
+ if (is->n_sclass == C_HIDEXT
+ && is->n_numaux > 0)
+ {
+ PTR auxptr;
+ union internal_auxent aux;
+
+ auxptr = ((PTR)
+ (((bfd_byte *)
+ obj_coff_external_syms (input_bfd))
+ + ((r_symndx + is->n_numaux)
+ * isymesz)));
+ bfd_coff_swap_aux_in (input_bfd, auxptr,
+ is->n_type, is->n_sclass,
+ is->n_numaux - 1,
+ is->n_numaux,
+ (PTR) &aux);
+ if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
+ && aux.x_csect.x_smclas == XMC_TC0)
+ indx = finfo->toc_symindx;
+ }
+ }
+
+ if (indx != -1)
+ irel->r_symndx = indx;
+ else
+ {
+ struct internal_syment *is;
+ const char *name;
+ char buf[SYMNMLEN + 1];
+
+ /* This reloc is against a symbol we are
+ stripping. It would be possible to handle
+ this case, but I don't think it's worth it. */
+ is = finfo->internal_syms + r_symndx;
+
+ name = (_bfd_coff_internal_syment_name
+ (input_bfd, is, buf));
+ if (name == NULL)
+ return false;
+
+ if (! ((*finfo->info->callbacks->unattached_reloc)
+ (finfo->info, name, input_bfd, o,
+ irel->r_vaddr)))
+ return false;
+ }
}
}
- else
- {
- long indx;
-
- indx = finfo->sym_indices[irel->r_symndx];
- if (indx == -1)
+ quiet = false;
+ switch (irel->r_type)
+ {
+ default:
+ if (h == NULL
+ || h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common)
+ break;
+ /* Fall through. */
+ case R_POS:
+ case R_NEG:
+ case R_RL:
+ case R_RLA:
+ /* This reloc needs to be copied into the .loader
+ section. */
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (r_symndx == -1)
+ ldrel.l_symndx = -1;
+ else if (h == NULL
+ || (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak
+ || h->root.type == bfd_link_hash_common))
{
- struct internal_syment *is;
-
- /* Relocations against a TC0 TOC anchor are
- automatically transformed to be against the
- TOC anchor in the output file. */
- is = finfo->internal_syms + irel->r_symndx;
- if (is->n_sclass == C_HIDEXT
- && is->n_numaux > 0)
+ asection *sec;
+
+ if (h == NULL)
+ sec = xcoff_data (input_bfd)->csects[r_symndx];
+ else if (h->root.type == bfd_link_hash_common)
+ sec = h->root.u.c.p->section;
+ else
+ sec = h->root.u.def.section;
+ sec = sec->output_section;
+
+ if (strcmp (sec->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (sec->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (sec->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
{
- PTR auxptr;
- union internal_auxent aux;
-
- auxptr = (PTR) (((bfd_byte *)
- obj_coff_external_syms (input_bfd))
- + ((irel->r_symndx + is->n_numaux)
- * isymesz));
- bfd_coff_swap_aux_in (input_bfd, auxptr,
- is->n_type, is->n_sclass,
- is->n_numaux - 1,
- is->n_numaux,
- (PTR) &aux);
- if (SMTYP_SMTYP (aux.x_csect.x_smtyp) == XTY_SD
- && aux.x_csect.x_smclas == XMC_TC0)
- indx = finfo->toc_symindx;
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (input_bfd),
+ sec->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
}
}
-
- if (indx != -1)
- irel->r_symndx = indx;
else
{
- struct internal_syment *is;
- const char *name;
- char buf[SYMNMLEN + 1];
-
- /* This reloc is against a symbol we are
- stripping. It would be possible to handle
- this case, but I don't think it's worth it. */
- is = finfo->internal_syms + irel->r_symndx;
-
- name = (_bfd_coff_internal_syment_name
- (input_bfd, is, buf));
- if (name == NULL)
- return false;
-
- if (! ((*finfo->info->callbacks->unattached_reloc)
- (finfo->info, name, input_bfd, o,
- irel->r_vaddr)))
- return false;
+ if (! finfo->info->relocateable
+ && (h->flags & XCOFF_DEF_DYNAMIC) == 0
+ && (h->flags & XCOFF_IMPORT) == 0)
+ {
+ /* We already called the undefined_symbol
+ callback for this relocation, in
+ _bfd_ppc_xcoff_relocate_section. Don't
+ issue any more warnings. */
+ quiet = true;
+ }
+ if (h->ldindx < 0 && ! quiet)
+ {
+ (*_bfd_error_handler)
+ (_("%s: `%s' in loader reloc but not loader sym"),
+ bfd_get_filename (input_bfd),
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ ldrel.l_symndx = h->ldindx;
}
+ ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
+ ldrel.l_rsecnm = o->output_section->target_index;
+ if (xcoff_hash_table (finfo->info)->textro
+ && strcmp (o->output_section->name, ".text") == 0
+ && ! quiet)
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in read-only section %s"),
+ bfd_get_filename (input_bfd),
+ bfd_get_section_name (finfo->output_bfd,
+ o->output_section));
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+ xcoff_swap_ldrel_out (output_bfd, &ldrel,
+ finfo->ldrel);
+ BFD_ASSERT (sizeof (struct external_ldrel) == LDRELSZ);
+ ++finfo->ldrel;
+ break;
+
+ case R_TOC:
+ case R_GL:
+ case R_TCL:
+ case R_TRL:
+ case R_TRLA:
+ /* We should never need a .loader reloc for a TOC
+ relative reloc. */
+ break;
}
}
return true;
}
+#undef N_TMASK
+#undef N_BTSHFT
+
/* Write out a non-XCOFF global symbol. */
static boolean
struct internal_syment isym;
union internal_auxent aux;
- /* XCOFF global symbols will be written out in xcoff_link_input_bfd.
- The only symbols we need to handle here are those from non-XCOFF
- files and from the linker script. */
- if (h->xcoff)
- return true;
-
output_bfd = finfo->output_bfd;
outsym = finfo->outsyms;
+ /* If this symbol was garbage collected, just skip it. */
+ if (xcoff_hash_table (finfo->info)->gc
+ && (h->flags & XCOFF_MARK) == 0)
+ return true;
+
+ /* If we need a .loader section entry, write it out. */
+ if (h->ldsym != NULL)
+ {
+ struct internal_ldsym *ldsym;
+ bfd *impbfd;
+
+ ldsym = h->ldsym;
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ {
+ ldsym->l_value = 0;
+ ldsym->l_scnum = N_UNDEF;
+ ldsym->l_smtype = XTY_ER;
+ impbfd = h->root.u.undef.abfd;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ ldsym->l_value = (sec->output_section->vma
+ + sec->output_offset
+ + h->root.u.def.value);
+ ldsym->l_scnum = sec->output_section->target_index;
+ ldsym->l_smtype = XTY_SD;
+ impbfd = sec->owner;
+ }
+ else
+ abort ();
+
+ if (((h->flags & XCOFF_DEF_REGULAR) == 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_IMPORT) != 0)
+ ldsym->l_smtype |= L_IMPORT;
+ if (((h->flags & XCOFF_DEF_REGULAR) != 0
+ && (h->flags & XCOFF_DEF_DYNAMIC) != 0)
+ || (h->flags & XCOFF_EXPORT) != 0)
+ ldsym->l_smtype |= L_EXPORT;
+ if ((h->flags & XCOFF_ENTRY) != 0)
+ ldsym->l_smtype |= L_ENTRY;
+
+ ldsym->l_smclas = h->smclas;
+
+ if (ldsym->l_ifile == (bfd_size_type) -1)
+ ldsym->l_ifile = 0;
+ else if (ldsym->l_ifile == 0)
+ {
+ if ((ldsym->l_smtype & L_IMPORT) == 0)
+ ldsym->l_ifile = 0;
+ else if (impbfd == NULL)
+ ldsym->l_ifile = 0;
+ else
+ {
+ BFD_ASSERT (impbfd->xvec == output_bfd->xvec);
+ ldsym->l_ifile = xcoff_data (impbfd)->import_file_id;
+ }
+ }
+
+ ldsym->l_parm = 0;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ BFD_ASSERT (LDSYMSZ == sizeof (struct external_ldsym));
+ xcoff_swap_ldsym_out (output_bfd, ldsym, finfo->ldsym + h->ldindx - 3);
+ h->ldsym = NULL;
+ }
+
+ /* If this symbol needs global linkage code, write it out. */
+ if (h->root.type == bfd_link_hash_defined
+ && (h->root.u.def.section
+ == xcoff_hash_table (finfo->info)->linkage_section))
+ {
+ bfd_byte *p;
+ bfd_vma tocoff;
+ unsigned int i;
+
+ p = h->root.u.def.section->contents + h->root.u.def.value;
+
+ /* The first instruction in the global linkage code loads a
+ specific TOC element. */
+ tocoff = (h->descriptor->toc_section->output_section->vma
+ + h->descriptor->toc_section->output_offset
+ - xcoff_data (output_bfd)->toc);
+ if ((h->descriptor->flags & XCOFF_SET_TOC) != 0)
+ tocoff += h->descriptor->u.toc_offset;
+ bfd_put_32 (output_bfd, XCOFF_GLINK_FIRST | (tocoff & 0xffff), p);
+ for (i = 0, p += 4;
+ i < sizeof xcoff_glink_code / sizeof xcoff_glink_code[0];
+ i++, p += 4)
+ bfd_put_32 (output_bfd, xcoff_glink_code[i], p);
+ }
+
+ /* If we created a TOC entry for this symbol, write out the required
+ relocs. */
+ if ((h->flags & XCOFF_SET_TOC) != 0)
+ {
+ asection *tocsec;
+ asection *osec;
+ int oindx;
+ struct internal_reloc *irel;
+ struct internal_ldrel ldrel;
+ struct internal_syment irsym;
+ union internal_auxent iraux;
+
+ tocsec = h->toc_section;
+ osec = tocsec->output_section;
+ oindx = osec->target_index;
+ irel = finfo->section_info[oindx].relocs + osec->reloc_count;
+ irel->r_vaddr = (osec->vma
+ + tocsec->output_offset
+ + h->u.toc_offset);
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
+ {
+ h->indx = -2;
+ irel->r_symndx = obj_raw_syment_count (output_bfd);
+ }
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ BFD_ASSERT (h->ldindx >= 0);
+ ldrel.l_vaddr = irel->r_vaddr;
+ ldrel.l_symndx = h->ldindx;
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+
+ /* We need to emit a symbol to define a csect which holds the
+ reloc. */
+ if (finfo->info->strip != strip_all)
+ {
+ if (strlen (h->root.root.string) <= SYMNMLEN)
+ strncpy (irsym._n._n_name, h->root.root.string, SYMNMLEN);
+ else
+ {
+ boolean hash;
+ bfd_size_type indx;
+
+ hash = true;
+ if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
+ hash = false;
+ indx = _bfd_stringtab_add (finfo->strtab, h->root.root.string,
+ hash, false);
+ if (indx == (bfd_size_type) -1)
+ return false;
+ irsym._n._n_n._n_zeroes = 0;
+ irsym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
+ }
+
+ irsym.n_value = irel->r_vaddr;
+ irsym.n_scnum = osec->target_index;
+ irsym.n_sclass = C_HIDEXT;
+ irsym.n_type = T_NULL;
+ irsym.n_numaux = 1;
+
+ bfd_coff_swap_sym_out (output_bfd, (PTR) &irsym, (PTR) outsym);
+ outsym += bfd_coff_symesz (output_bfd);
+
+ memset (&iraux, 0, sizeof iraux);
+ iraux.x_csect.x_smtyp = XTY_SD;
+ iraux.x_csect.x_scnlen.l = 4;
+ iraux.x_csect.x_smclas = XMC_TC;
+
+ bfd_coff_swap_aux_out (output_bfd, (PTR) &iraux, T_NULL, C_HIDEXT,
+ 0, 1, (PTR) outsym);
+ outsym += bfd_coff_auxesz (output_bfd);
+
+ if (h->indx >= 0)
+ {
+ /* We aren't going to write out the symbols below, so we
+ need to write them out now. */
+ if (bfd_seek (output_bfd,
+ (obj_sym_filepos (output_bfd)
+ + (obj_raw_syment_count (output_bfd)
+ * bfd_coff_symesz (output_bfd))),
+ SEEK_SET) != 0
+ || (bfd_write (finfo->outsyms, outsym - finfo->outsyms, 1,
+ output_bfd)
+ != (bfd_size_type) (outsym - finfo->outsyms)))
+ return false;
+ obj_raw_syment_count (output_bfd) +=
+ (outsym - finfo->outsyms) / bfd_coff_symesz (output_bfd);
+
+ outsym = finfo->outsyms;
+ }
+ }
+ }
+
+ /* If this symbol is a specially defined function descriptor, write
+ it out. The first word is the address of the function code
+ itself, the second word is the address of the TOC, and the third
+ word is zero. */
+ if ((h->flags & XCOFF_DESCRIPTOR) != 0
+ && h->root.type == bfd_link_hash_defined
+ && (h->root.u.def.section
+ == xcoff_hash_table (finfo->info)->descriptor_section))
+ {
+ asection *sec;
+ asection *osec;
+ int oindx;
+ bfd_byte *p;
+ struct xcoff_link_hash_entry *hentry;
+ asection *esec;
+ struct internal_reloc *irel;
+ struct internal_ldrel ldrel;
+ asection *tsec;
+
+ sec = h->root.u.def.section;
+ osec = sec->output_section;
+ oindx = osec->target_index;
+ p = sec->contents + h->root.u.def.value;
+
+ hentry = h->descriptor;
+ BFD_ASSERT (hentry != NULL
+ && (hentry->root.type == bfd_link_hash_defined
+ || hentry->root.type == bfd_link_hash_defweak));
+ esec = hentry->root.u.def.section;
+ bfd_put_32 (output_bfd,
+ (esec->output_section->vma
+ + esec->output_offset
+ + hentry->root.u.def.value),
+ p);
+
+ irel = finfo->section_info[oindx].relocs + osec->reloc_count;
+ irel->r_vaddr = (osec->vma
+ + sec->output_offset
+ + h->root.u.def.value);
+ irel->r_symndx = esec->output_section->target_index;
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (strcmp (esec->output_section->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (esec->output_section->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (esec->output_section->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd),
+ esec->output_section->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+
+ bfd_put_32 (output_bfd, xcoff_data (output_bfd)->toc, p + 4);
+
+ tsec = coff_section_from_bfd_index (output_bfd,
+ xcoff_data (output_bfd)->sntoc);
+
+ ++irel;
+ irel->r_vaddr = (osec->vma
+ + sec->output_offset
+ + h->root.u.def.value
+ + 4);
+ irel->r_symndx = tsec->output_section->target_index;
+ irel->r_type = R_POS;
+ irel->r_size = 31;
+ finfo->section_info[oindx].rel_hashes[osec->reloc_count] = NULL;
+ ++osec->reloc_count;
+
+ ldrel.l_vaddr = irel->r_vaddr;
+ if (strcmp (tsec->output_section->name, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (tsec->output_section->name, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (tsec->output_section->name, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd),
+ tsec->output_section->name);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
+ }
+ ldrel.l_rtype = (31 << 8) | R_POS;
+ ldrel.l_rsecnm = oindx;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
+ }
+
+ if (h->indx >= 0 || finfo->info->strip == strip_all)
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
+ if (h->indx != -2
+ && (finfo->info->strip == strip_all
+ || (finfo->info->strip == strip_some
+ && (bfd_hash_lookup (finfo->info->keep_hash,
+ h->root.root.string, false, false)
+ == NULL))))
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
+ if (h->indx != -2
+ && (h->flags & (XCOFF_REF_REGULAR | XCOFF_DEF_REGULAR)) == 0)
+ {
+ BFD_ASSERT (outsym == finfo->outsyms);
+ return true;
+ }
+
memset (&aux, 0, sizeof aux);
h->indx = obj_raw_syment_count (output_bfd);
isym.n_sclass = C_EXT;
aux.x_csect.x_smtyp = XTY_ER;
}
+ else if ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->smclas == XMC_XO)
+ {
+ BFD_ASSERT (bfd_is_abs_section (h->root.u.def.section));
+ isym.n_value = h->root.u.def.value;
+ isym.n_scnum = N_UNDEF;
+ isym.n_sclass = C_EXT;
+ aux.x_csect.x_smtyp = XTY_ER;
+ }
else if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
+ struct xcoff_link_size_list *l;
+
isym.n_value = (h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset
+ h->root.u.def.value);
isym.n_scnum = h->root.u.def.section->output_section->target_index;
isym.n_sclass = C_HIDEXT;
aux.x_csect.x_smtyp = XTY_SD;
- /* I don't know what the csect length should be in this case. */
+
+ if ((h->flags & XCOFF_HAS_SIZE) != 0)
+ {
+ for (l = xcoff_hash_table (finfo->info)->size_list;
+ l != NULL;
+ l = l->next)
+ {
+ if (l->h == h)
+ {
+ aux.x_csect.x_scnlen.l = l->size;
+ break;
+ }
+ }
+ }
+ }
+ else if (h->root.type == bfd_link_hash_common)
+ {
+ isym.n_value = (h->root.u.c.p->section->output_section->vma
+ + h->root.u.c.p->section->output_offset);
+ isym.n_scnum = h->root.u.c.p->section->output_section->target_index;
+ isym.n_sclass = C_EXT;
+ aux.x_csect.x_smtyp = XTY_CM;
+ aux.x_csect.x_scnlen.l = h->root.u.c.size;
}
else
abort ();
bfd_coff_swap_sym_out (output_bfd, (PTR) &isym, (PTR) outsym);
outsym += bfd_coff_symesz (output_bfd);
- aux.x_csect.x_smclas = XMC_UA;
+ aux.x_csect.x_smclas = h->smclas;
bfd_coff_swap_aux_out (output_bfd, (PTR) &aux, T_NULL, isym.n_sclass, 0, 1,
(PTR) outsym);
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
- && aux.x_csect.x_smclas != XMC_TC0)
+ && h->smclas != XMC_XO)
{
/* We just output an SD symbol. Now output an LD symbol. */
struct bfd_link_order *link_order;
{
reloc_howto_type *howto;
+ struct xcoff_link_hash_entry *h;
+ asection *hsec;
+ bfd_vma hval;
+ bfd_vma addend;
struct internal_reloc *irel;
struct xcoff_link_hash_entry **rel_hash_ptr;
+ struct internal_ldrel ldrel;
+
+ if (link_order->type == bfd_section_reloc_link_order)
+ {
+ /* We need to somehow locate a symbol in the right section. The
+ symbol must either have a value of zero, or we must adjust
+ the addend by the value of the symbol. FIXME: Write this
+ when we need it. The old linker couldn't handle this anyhow. */
+ abort ();
+ }
howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
if (howto == NULL)
return false;
}
- if (link_order->u.reloc.p->addend != 0)
+ h = ((struct xcoff_link_hash_entry *)
+ bfd_wrapped_link_hash_lookup (output_bfd, finfo->info,
+ link_order->u.reloc.p->u.name,
+ false, false, true));
+ if (h == NULL)
+ {
+ if (! ((*finfo->info->callbacks->unattached_reloc)
+ (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
+ (asection *) NULL, (bfd_vma) 0)))
+ return false;
+ return true;
+ }
+
+ if (h->root.type == bfd_link_hash_common)
+ {
+ hsec = h->root.u.c.p->section;
+ hval = 0;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ hsec = h->root.u.def.section;
+ hval = h->root.u.def.value;
+ }
+ else
+ {
+ hsec = NULL;
+ hval = 0;
+ }
+
+ addend = link_order->u.reloc.p->addend;
+ if (hsec != NULL)
+ addend += (hsec->output_section->vma
+ + hsec->output_offset
+ + hval);
+
+ if (addend != 0)
{
bfd_size_type size;
bfd_byte *buf;
size = bfd_get_reloc_size (howto);
buf = (bfd_byte *) bfd_zmalloc (size);
if (buf == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
+ return false;
- rstat = _bfd_relocate_contents (howto, output_bfd,
- link_order->u.reloc.p->addend, buf);
+ rstat = _bfd_relocate_contents (howto, output_bfd, addend, buf);
switch (rstat)
{
case bfd_reloc_ok:
abort ();
case bfd_reloc_overflow:
if (! ((*finfo->info->callbacks->reloc_overflow)
- (finfo->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)))
+ (finfo->info, link_order->u.reloc.p->u.name,
+ howto->name, addend, (bfd *) NULL, (asection *) NULL,
+ (bfd_vma) 0)))
{
free (buf);
return false;
irel->r_vaddr = output_section->vma + link_order->offset;
- if (link_order->type == bfd_section_reloc_link_order)
+ if (h->indx >= 0)
+ irel->r_symndx = h->indx;
+ else
{
- /* We need to somehow locate a symbol in the right section. The
- symbol must either have a value of zero, or we must adjust
- the addend by the value of the symbol. FIXME: Write this
- when we need it. The old linker couldn't handle this anyhow. */
- abort ();
- *rel_hash_ptr = NULL;
+ /* Set the index to -2 to force this symbol to get written out. */
+ h->indx = -2;
+ *rel_hash_ptr = h;
irel->r_symndx = 0;
}
- else
+
+ irel->r_type = howto->type;
+ irel->r_size = howto->bitsize - 1;
+ if (howto->complain_on_overflow == complain_overflow_signed)
+ irel->r_size |= 0x80;
+
+ ++output_section->reloc_count;
+
+ /* Now output the reloc to the .loader section. */
+
+ ldrel.l_vaddr = irel->r_vaddr;
+
+ if (hsec != NULL)
{
- struct xcoff_link_hash_entry *h;
+ const char *secname;
- h = xcoff_link_hash_lookup (xcoff_hash_table (finfo->info),
- link_order->u.reloc.p->u.name,
- false, false, true);
- if (h != NULL)
+ secname = hsec->output_section->name;
+
+ if (strcmp (secname, ".text") == 0)
+ ldrel.l_symndx = 0;
+ else if (strcmp (secname, ".data") == 0)
+ ldrel.l_symndx = 1;
+ else if (strcmp (secname, ".bss") == 0)
+ ldrel.l_symndx = 2;
+ else
{
- if (h->indx >= 0)
- irel->r_symndx = h->indx;
- else
- {
- /* Set the index to -2 to force this symbol to get
- written out. */
- h->indx = -2;
- *rel_hash_ptr = h;
- irel->r_symndx = 0;
- }
+ (*_bfd_error_handler)
+ (_("%s: loader reloc in unrecognized section `%s'"),
+ bfd_get_filename (output_bfd), secname);
+ bfd_set_error (bfd_error_nonrepresentable_section);
+ return false;
}
- else
+ }
+ else
+ {
+ if (h->ldindx < 0)
{
- if (! ((*finfo->info->callbacks->unattached_reloc)
- (finfo->info, link_order->u.reloc.p->u.name, (bfd *) NULL,
- (asection *) NULL, (bfd_vma) 0)))
- return false;
- irel->r_symndx = 0;
+ (*_bfd_error_handler)
+ (_("%s: `%s' in loader reloc but not loader sym"),
+ bfd_get_filename (output_bfd),
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
}
+ ldrel.l_symndx = h->ldindx;
}
- irel->r_type = howto->type;
- irel->r_size = howto->bitsize - 1;
- if (howto->complain_on_overflow == complain_overflow_signed)
- irel->r_size |= 0x80;
-
- ++output_section->reloc_count;
+ ldrel.l_rtype = (irel->r_size << 8) | irel->r_type;
+ ldrel.l_rsecnm = output_section->target_index;
+ xcoff_swap_ldrel_out (output_bfd, &ldrel, finfo->ldrel);
+ ++finfo->ldrel;
return true;
}
struct reloc_howto_struct howto;
bfd_reloc_status_type rstat;
- /* Relocation type 0x0f is a special relocation type which is
+ /* Relocation type R_REF is a special relocation type which is
merely used to prevent garbage collection from occurring for
the csect including the symbol which it references. */
- if (rel->r_type == 0x0f)
+ if (rel->r_type == R_REF)
continue;
symndx = rel->r_symndx;
else
{
sec = sections[symndx];
- val = (sec->output_section->vma
- + sec->output_offset
- + sym->n_value
- - sec->vma);
+ /* Hack to make sure we use the right TOC anchor value
+ if this reloc is against the TOC anchor. */
+ if (sec->name[3] == '0'
+ && strcmp (sec->name, ".tc0") == 0)
+ val = xcoff_data (output_bfd)->toc;
+ else
+ val = (sec->output_section->vma
+ + sec->output_offset
+ + sym->n_value
+ - sec->vma);
}
}
else
+ sec->output_section->vma
+ sec->output_offset);
}
+ else if (h->root.type == bfd_link_hash_common)
+ {
+ asection *sec;
+
+ sec = h->root.u.c.p->section;
+ val = (sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if ((h->flags & XCOFF_DEF_DYNAMIC) != 0
+ || (h->flags & XCOFF_IMPORT) != 0)
+ {
+ /* Every symbol in a shared object is defined somewhere. */
+ val = 0;
+ }
else if (! info->relocateable)
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd, input_section,
rel->r_vaddr - input_section->vma)))
return false;
+
+ /* Don't try to process the reloc. It can't help, and
+ it may generate another error. */
+ continue;
}
}
switch (rel->r_type)
{
- case 0x04:
- case 0x14:
- case 0x15:
+ case R_RTB:
+ case R_RRTBI:
+ case R_RRTBA:
/* These relocs are defined by the PowerPC ABI to be
relative branches which use half of the difference
between the symbol and the program counter. I can't
not defined by the PowerOpen ABI. */
default:
(*_bfd_error_handler)
- ("%s: unsupported relocation type 0x%02x",
+ (_("%s: unsupported relocation type 0x%02x"),
bfd_get_filename (input_bfd), (unsigned int) rel->r_type);
bfd_set_error (bfd_error_bad_value);
return false;
- case 0x00:
+ case R_POS:
/* Simple positive relocation. */
break;
- case 0x01:
+ case R_NEG:
/* Simple negative relocation. */
val = - val;
break;
- case 0x02:
+ case R_REL:
/* Simple PC relative relocation. */
howto.pc_relative = true;
break;
- case 0x03:
+ case R_TOC:
/* TOC relative relocation. The value in the instruction in
the input file is the offset from the input file TOC to
the desired location. We want the offset from the final
oinsn = on + o
so we must change insn by on - in.
*/
- case 0x05:
+ case R_GL:
/* Global linkage relocation. The value of this relocation
is the address of the entry in the TOC section. */
- case 0x06:
+ case R_TCL:
/* Local object TOC address. I can't figure out the
- difference between this and case 0x05. */
- case 0x12:
+ difference between this and case R_GL. */
+ case R_TRL:
/* TOC relative relocation. A TOC relative load instruction
which may be changed to a load address instruction.
FIXME: We don't currently implement this optimization. */
- case 0x13:
+ case R_TRLA:
/* TOC relative relocation. This is a TOC relative load
address instruction which may be changed to a load
instruction. FIXME: I don't know if this is the correct
implementation. */
+ if (h != NULL && h->smclas != XMC_TD)
+ {
+ if (h->toc_section == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry"),
+ bfd_get_filename (input_bfd), rel->r_vaddr,
+ h->root.root.string);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ BFD_ASSERT ((h->flags & XCOFF_SET_TOC) == 0);
+ val = (h->toc_section->output_section->vma
+ + h->toc_section->output_offset);
+ }
+
val = ((val - xcoff_data (output_bfd)->toc)
- (sym->n_value - xcoff_data (input_bfd)->toc));
addend = 0;
break;
- case 0x08:
+ case R_BA:
/* Absolute branch. We don't want to mess with the lower
two bits of the instruction. */
- case 0x16:
+ case R_CAI:
/* The PowerPC ABI defines this as an absolute call which
may be modified to become a relative call. The PowerOpen
ABI does not define this relocation type. */
- case 0x18:
+ case R_RBA:
/* Absolute branch which may be modified to become a
relative branch. */
- case 0x19:
+ case R_RBAC:
/* The PowerPC ABI defines this as an absolute branch to a
fixed address which may be modified to an absolute branch
to a symbol. The PowerOpen ABI does not define this
relocation type. */
- case 0x1b:
+ case R_RBRC:
/* The PowerPC ABI defines this as an absolute branch to a
fixed address which may be modified to a relative branch.
The PowerOpen ABI does not define this relocation type. */
howto.src_mask &= ~3;
howto.dst_mask = howto.src_mask;
break;
- case 0x0a:
+ case R_BR:
/* Relative branch. We don't want to mess with the lower
two bits of the instruction. */
- case 0x17:
+ case R_CREL:
/* The PowerPC ABI defines this as a relative call which may
be modified to become an absolute call. The PowerOpen
ABI does not define this relocation type. */
- case 0x1a:
+ case R_RBR:
/* A relative branch which may be modified to become an
absolute branch. FIXME: We don't implement this,
although we should for symbols of storage mapping class
howto.src_mask &= ~3;
howto.dst_mask = howto.src_mask;
break;
- case 0x0c:
+ case R_RL:
/* The PowerPC AIX ABI describes this as a load which may be
changed to a load address. The PowerOpen ABI says this
- is the same as case 0x00. */
+ is the same as case R_POS. */
break;
- case 0x0d:
+ case R_RLA:
/* The PowerPC AIX ABI describes this as a load address
which may be changed to a load. The PowerOpen ABI says
- this is the same as case 0x00. */
+ this is the same as R_POS. */
break;
}
+ /* If we see an R_BR or R_RBR reloc which is jumping to global
+ linkage code, and it is followed by an appropriate cror nop
+ instruction, we replace the cror with lwz r2,20(r1). This
+ restores the TOC after the glink code. Contrariwise, if the
+ call is followed by a lwz r2,20(r1), but the call is not
+ going to global linkage code, we can replace the load with a
+ cror. */
+ if ((rel->r_type == R_BR || rel->r_type == R_RBR)
+ && h != NULL
+ && h->root.type == bfd_link_hash_defined
+ && (rel->r_vaddr - input_section->vma + 8
+ <= input_section->_cooked_size))
+ {
+ bfd_byte *pnext;
+ unsigned long next;
+
+ pnext = contents + (rel->r_vaddr - input_section->vma) + 4;
+ next = bfd_get_32 (input_bfd, pnext);
+
+ /* The _ptrgl function is magic. It is used by the AIX
+ compiler to call a function through a pointer. */
+ if (h->smclas == XMC_GL
+ || strcmp (h->root.root.string, "._ptrgl") == 0)
+ {
+ if (next == 0x4def7b82 /* cror 15,15,15 */
+ || next == 0x4ffffb82) /* cror 31,31,31 */
+ bfd_put_32 (input_bfd, 0x80410014, pnext); /* lwz r1,20(r1) */
+ }
+ else
+ {
+ if (next == 0x80410014) /* lwz r1,20(r1) */
+ bfd_put_32 (input_bfd, 0x4ffffb82, pnext); /* cror 31,31,31 */
+ }
+ }
+
+ /* A PC relative reloc includes the section address. */
+ if (howto.pc_relative)
+ addend += input_section->vma;
+
rstat = _bfd_final_link_relocate (&howto, input_bfd, input_section,
contents,
rel->r_vaddr - input_section->vma,
projects / external / binutils.git / blobdiff