/* COFF specific linker code.
- Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009, 2011 Free Software Foundation, Inc.
+ Copyright (C) 1994-2015 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
#include "libcoff.h"
#include "safe-ctype.h"
-static bfd_boolean coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info);
-static bfd_boolean coff_link_check_archive_element (bfd *abfd, struct bfd_link_info *info, bfd_boolean *pneeded);
-static bfd_boolean coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info);
+static bfd_boolean coff_link_add_object_symbols (bfd *, struct bfd_link_info *);
+static bfd_boolean coff_link_check_archive_element
+ (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *, const char *,
+ bfd_boolean *);
+static bfd_boolean coff_link_add_symbols (bfd *, struct bfd_link_info *);
/* Return TRUE if SYM is a weak, external symbol. */
#define IS_WEAK_EXTERNAL(abfd, sym) \
return TRUE;
}
-/* Look through the symbols to see if this object file should be
- included in the link. */
-
-static bfd_boolean
-coff_link_check_ar_symbols (bfd *abfd,
- struct bfd_link_info *info,
- bfd_boolean *pneeded,
- bfd **subsbfd)
-{
- bfd_size_type symesz;
- bfd_byte *esym;
- bfd_byte *esym_end;
-
- *pneeded = FALSE;
-
- symesz = bfd_coff_symesz (abfd);
- esym = (bfd_byte *) obj_coff_external_syms (abfd);
- esym_end = esym + obj_raw_syment_count (abfd) * symesz;
- while (esym < esym_end)
- {
- struct internal_syment sym;
- enum coff_symbol_classification classification;
-
- bfd_coff_swap_sym_in (abfd, esym, &sym);
-
- classification = bfd_coff_classify_symbol (abfd, &sym);
- if (classification == COFF_SYMBOL_GLOBAL
- || classification == COFF_SYMBOL_COMMON)
- {
- const char *name;
- char buf[SYMNMLEN + 1];
- struct bfd_link_hash_entry *h;
-
- /* This symbol is externally visible, and is defined by this
- object file. */
- name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
- if (name == NULL)
- return FALSE;
- h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
-
- /* Auto import. */
- if (!h
- && info->pei386_auto_import
- && CONST_STRNEQ (name, "__imp_"))
- h = bfd_link_hash_lookup (info->hash, name + 6, FALSE, FALSE, TRUE);
-
- /* We are only interested in symbols that are currently
- undefined. If a symbol is currently known to be common,
- COFF linkers do not bring in an object file which defines
- it. */
- if (h != (struct bfd_link_hash_entry *) NULL
- && h->type == bfd_link_hash_undefined)
- {
- if (!(*info->callbacks
- ->add_archive_element) (info, abfd, name, subsbfd))
- return FALSE;
- *pneeded = TRUE;
- return TRUE;
- }
- }
-
- esym += (sym.n_numaux + 1) * symesz;
- }
-
- /* We do not need this object file. */
- return TRUE;
-}
-
/* Check a single archive element to see if we need to include it in
the link. *PNEEDED is set according to whether this element is
needed in the link or not. This is called via
static bfd_boolean
coff_link_check_archive_element (bfd *abfd,
struct bfd_link_info *info,
+ struct bfd_link_hash_entry *h,
+ const char *name,
bfd_boolean *pneeded)
{
- bfd *oldbfd;
- bfd_boolean needed;
+ *pneeded = FALSE;
- if (!_bfd_coff_get_external_symbols (abfd))
- return FALSE;
+ /* We are only interested in symbols that are currently undefined.
+ If a symbol is currently known to be common, COFF linkers do not
+ bring in an object file which defines it. */
+ if (h->type != bfd_link_hash_undefined)
+ return TRUE;
- oldbfd = abfd;
- if (!coff_link_check_ar_symbols (abfd, info, pneeded, &abfd))
+ if (!(*info->callbacks->add_archive_element) (info, abfd, name, &abfd))
return FALSE;
+ *pneeded = TRUE;
- needed = *pneeded;
- if (needed)
- {
- /* Potentially, the add_archive_element hook may have set a
- substitute BFD for us. */
- if (abfd != oldbfd)
- {
- if (!info->keep_memory
- && !_bfd_coff_free_symbols (oldbfd))
- return FALSE;
- if (!_bfd_coff_get_external_symbols (abfd))
- return FALSE;
- }
- if (!coff_link_add_symbols (abfd, info))
- return FALSE;
- }
-
- if (!info->keep_memory || !needed)
- {
- if (!_bfd_coff_free_symbols (abfd))
- return FALSE;
- }
- return TRUE;
+ return coff_link_add_object_symbols (abfd, info);
}
/* Add all the symbols from an object file to the hash table. */
{
bfd_size_type string_offset = 0;
asection *stab;
-
+
for (stab = abfd->sections; stab; stab = stab->next)
if (CONST_STRNEQ (stab->name, ".stab")
&& (!stab->name[5]
struct coff_link_hash_table *table;
struct coff_section_tdata *secdata
= coff_section_data (abfd, stab);
-
+
if (secdata == NULL)
{
amt = sizeof (struct coff_section_tdata);
the opportunity to clear the output_has_begun fields of all the
input BFD's. */
max_sym_count = 0;
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
{
size_t sz;
if (flaginfo.info->strip != strip_all && flaginfo.info->discard != discard_all)
{
/* Add local symbols from foreign inputs. */
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
+ for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
{
unsigned int i;
elsewhere. */
struct internal_reloc incount;
bfd_byte *excount = (bfd_byte *)bfd_malloc (relsz);
-
+
memset (&incount, 0, sizeof (incount));
incount.r_vaddr = o->reloc_count + 1;
- bfd_coff_swap_reloc_out (abfd, (PTR) &incount, (PTR) excount);
+ bfd_coff_swap_reloc_out (abfd, &incount, excount);
if (bfd_bwrite (excount, relsz, abfd) != relsz)
/* We'll leak, but it's an error anyway. */
goto error_return;
struct internal_reloc * irel;
struct internal_reloc * irelend;
- if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
+ if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1
+ || a->linker_mark == 0)
continue;
/* Don't mark relocs in excluded sections. */
if (a->output_section == bfd_abs_section_ptr)
if (strings == NULL)
return FALSE;
}
- filename = strings + auxp->x_file.x_n.x_offset;
+ if ((bfd_size_type) auxp->x_file.x_n.x_offset >= obj_coff_strings_len (input_bfd))
+ filename = _("<corrupt>");
+ else
+ filename = strings + auxp->x_file.x_n.x_offset;
indx = _bfd_stringtab_add (flaginfo->strtab, filename,
hash, copy);
if (indx == (bfd_size_type) -1)
contents = secdata->contents;
else
{
- bfd_size_type x = o->rawsize ? o->rawsize : o->size;
- if (! bfd_get_section_contents (input_bfd, o, flaginfo->contents, 0, x))
- return FALSE;
contents = flaginfo->contents;
+ if (! bfd_get_full_section_contents (input_bfd, o, &contents))
+ return FALSE;
}
if ((o->flags & SEC_RELOC) != 0)
? (flaginfo->section_info[target_index].relocs
+ o->output_section->reloc_count)
: flaginfo->internal_relocs)));
- if (internal_relocs == NULL)
+ if (internal_relocs == NULL
+ && o->reloc_count > 0)
return FALSE;
/* Run through the relocs looking for relocs against symbols
size = bfd_get_reloc_size (howto);
buf = (bfd_byte *) bfd_zmalloc (size);
- if (buf == NULL)
+ if (buf == NULL && size != 0)
return FALSE;
rstat = _bfd_relocate_contents (howto, output_bfd,
struct internal_syment *sym;
bfd_vma addend;
bfd_vma val;
+ asection *sec;
reloc_howto_type *howto;
bfd_reloc_status_type rstat;
}
val = 0;
-
+ sec = NULL;
if (h == NULL)
{
- asection *sec;
-
if (symndx == -1)
{
sec = bfd_abs_section_ptr;
|| h->root.type == bfd_link_hash_defweak)
{
/* Defined weak symbols are a GNU extension. */
- asection *sec;
-
sec = h->root.u.def.section;
val = (h->root.u.def.value
+ sec->output_section->vma
will resolve a weak external only if a normal
external causes the library member to be linked.
See also linker.c: generic_link_check_archive_element. */
- asection *sec;
struct coff_link_hash_entry *h2 =
h->auxbfd->tdata.coff_obj_data->sym_hashes[
h->aux->x_sym.x_tagndx.l];
}
}
+ /* If the input section defining the symbol has been discarded
+ then zero this reloc field. */
+ if (sec != NULL && discarded_section (sec))
+ {
+ _bfd_clear_contents (howto, input_bfd, input_section,
+ contents + (rel->r_vaddr - input_section->vma));
+ continue;
+ }
+
if (info->base_file)
{
/* Emit a reloc if the backend thinks it needs it. */
projects / deliverable / binutils-gdb.git / blobdiff