3046 lines
86 KiB
C
3046 lines
86 KiB
C
/* COFF specific linker code.
|
||
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
|
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2004, 2005, 2006, 2007 Free Software Foundation, Inc.
|
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Written by Ian Lance Taylor, Cygnus Support.
|
||
|
||
This file is part of BFD, the Binary File Descriptor library.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
||
MA 02110-1301, USA. */
|
||
|
||
/* This file contains the COFF backend linker code. */
|
||
|
||
#include "sysdep.h"
|
||
#include "bfd.h"
|
||
#include "bfdlink.h"
|
||
#include "libbfd.h"
|
||
#include "coff/internal.h"
|
||
#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);
|
||
|
||
/* Return TRUE if SYM is a weak, external symbol. */
|
||
#define IS_WEAK_EXTERNAL(abfd, sym) \
|
||
((sym).n_sclass == C_WEAKEXT \
|
||
|| (obj_pe (abfd) && (sym).n_sclass == C_NT_WEAK))
|
||
|
||
/* Return TRUE if SYM is an external symbol. */
|
||
#define IS_EXTERNAL(abfd, sym) \
|
||
((sym).n_sclass == C_EXT || IS_WEAK_EXTERNAL (abfd, sym))
|
||
|
||
/* Define macros so that the ISFCN, et. al., macros work correctly.
|
||
These macros are defined in include/coff/internal.h in terms of
|
||
N_TMASK, etc. These definitions require a user to define local
|
||
variables with the appropriate names, and with values from the
|
||
coff_data (abfd) structure. */
|
||
|
||
#define N_TMASK n_tmask
|
||
#define N_BTSHFT n_btshft
|
||
#define N_BTMASK n_btmask
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||
|
||
/* Create an entry in a COFF linker hash table. */
|
||
|
||
struct bfd_hash_entry *
|
||
_bfd_coff_link_hash_newfunc (struct bfd_hash_entry *entry,
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||
struct bfd_hash_table *table,
|
||
const char *string)
|
||
{
|
||
struct coff_link_hash_entry *ret = (struct coff_link_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct coff_link_hash_entry *) NULL)
|
||
ret = ((struct coff_link_hash_entry *)
|
||
bfd_hash_allocate (table, sizeof (struct coff_link_hash_entry)));
|
||
if (ret == (struct coff_link_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct coff_link_hash_entry *)
|
||
_bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret,
|
||
table, string));
|
||
if (ret != (struct coff_link_hash_entry *) NULL)
|
||
{
|
||
/* Set local fields. */
|
||
ret->indx = -1;
|
||
ret->type = T_NULL;
|
||
ret->class = C_NULL;
|
||
ret->numaux = 0;
|
||
ret->auxbfd = NULL;
|
||
ret->aux = NULL;
|
||
}
|
||
|
||
return (struct bfd_hash_entry *) ret;
|
||
}
|
||
|
||
/* Initialize a COFF linker hash table. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_link_hash_table_init (struct coff_link_hash_table *table,
|
||
bfd *abfd,
|
||
struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
|
||
struct bfd_hash_table *,
|
||
const char *),
|
||
unsigned int entsize)
|
||
{
|
||
memset (&table->stab_info, 0, sizeof (table->stab_info));
|
||
return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
|
||
}
|
||
|
||
/* Create a COFF linker hash table. */
|
||
|
||
struct bfd_link_hash_table *
|
||
_bfd_coff_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct coff_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct coff_link_hash_table);
|
||
|
||
ret = bfd_malloc (amt);
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
if (! _bfd_coff_link_hash_table_init (ret, abfd,
|
||
_bfd_coff_link_hash_newfunc,
|
||
sizeof (struct coff_link_hash_entry)))
|
||
{
|
||
free (ret);
|
||
return (struct bfd_link_hash_table *) NULL;
|
||
}
|
||
return &ret->root;
|
||
}
|
||
|
||
/* Create an entry in a COFF debug merge hash table. */
|
||
|
||
struct bfd_hash_entry *
|
||
_bfd_coff_debug_merge_hash_newfunc (struct bfd_hash_entry *entry,
|
||
struct bfd_hash_table *table,
|
||
const char *string)
|
||
{
|
||
struct coff_debug_merge_hash_entry *ret =
|
||
(struct coff_debug_merge_hash_entry *) entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == (struct coff_debug_merge_hash_entry *) NULL)
|
||
ret = ((struct coff_debug_merge_hash_entry *)
|
||
bfd_hash_allocate (table,
|
||
sizeof (struct coff_debug_merge_hash_entry)));
|
||
if (ret == (struct coff_debug_merge_hash_entry *) NULL)
|
||
return (struct bfd_hash_entry *) ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = ((struct coff_debug_merge_hash_entry *)
|
||
bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
|
||
if (ret != (struct coff_debug_merge_hash_entry *) NULL)
|
||
{
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||
/* Set local fields. */
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||
ret->types = NULL;
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||
}
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||
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||
return (struct bfd_hash_entry *) ret;
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||
}
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||
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/* Given a COFF BFD, add symbols to the global hash table as
|
||
appropriate. */
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||
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||
bfd_boolean
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||
_bfd_coff_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
switch (bfd_get_format (abfd))
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||
{
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||
case bfd_object:
|
||
return coff_link_add_object_symbols (abfd, info);
|
||
case bfd_archive:
|
||
return _bfd_generic_link_add_archive_symbols
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||
(abfd, info, coff_link_check_archive_element);
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||
default:
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||
bfd_set_error (bfd_error_wrong_format);
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||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/* Add symbols from a COFF object file. */
|
||
|
||
static bfd_boolean
|
||
coff_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
if (! _bfd_coff_get_external_symbols (abfd))
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return FALSE;
|
||
if (! coff_link_add_symbols (abfd, info))
|
||
return FALSE;
|
||
|
||
if (! info->keep_memory
|
||
&& ! _bfd_coff_free_symbols (abfd))
|
||
return FALSE;
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||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Look through the symbols to see if this object file should be
|
||
included in the link. */
|
||
|
||
static bfd_boolean
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||
coff_link_check_ar_symbols (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
bfd_boolean *pneeded)
|
||
{
|
||
bfd_size_type symesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
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||
|
||
*pneeded = FALSE;
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||
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||
symesz = bfd_coff_symesz (abfd);
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||
esym = (bfd_byte *) obj_coff_external_syms (abfd);
|
||
esym_end = esym + obj_raw_syment_count (abfd) * symesz;
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||
while (esym < esym_end)
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||
{
|
||
struct internal_syment sym;
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||
enum coff_symbol_classification classification;
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||
|
||
bfd_coff_swap_sym_in (abfd, esym, &sym);
|
||
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classification = bfd_coff_classify_symbol (abfd, &sym);
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||
if (classification == COFF_SYMBOL_GLOBAL
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||
|| classification == COFF_SYMBOL_COMMON)
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{
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const char *name;
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char buf[SYMNMLEN + 1];
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||
struct bfd_link_hash_entry *h;
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||
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/* This symbol is externally visible, and is defined by this
|
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object file. */
|
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name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
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if (name == NULL)
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return FALSE;
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h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
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||
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/* Auto import. */
|
||
if (!h
|
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&& info->pei386_auto_import
|
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&& CONST_STRNEQ (name, "__imp_"))
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h = bfd_link_hash_lookup (info->hash, name + 6, FALSE, FALSE, TRUE);
|
||
|
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/* 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))
|
||
return FALSE;
|
||
*pneeded = TRUE;
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||
return TRUE;
|
||
}
|
||
}
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||
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
}
|
||
|
||
/* We do not need this object file. */
|
||
return TRUE;
|
||
}
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||
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||
/* 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
|
||
_bfd_generic_link_add_archive_symbols. */
|
||
|
||
static bfd_boolean
|
||
coff_link_check_archive_element (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
bfd_boolean *pneeded)
|
||
{
|
||
if (! _bfd_coff_get_external_symbols (abfd))
|
||
return FALSE;
|
||
|
||
if (! coff_link_check_ar_symbols (abfd, info, pneeded))
|
||
return FALSE;
|
||
|
||
if (*pneeded
|
||
&& ! coff_link_add_symbols (abfd, info))
|
||
return FALSE;
|
||
|
||
if ((! info->keep_memory || ! *pneeded)
|
||
&& ! _bfd_coff_free_symbols (abfd))
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Add all the symbols from an object file to the hash table. */
|
||
|
||
static bfd_boolean
|
||
coff_link_add_symbols (bfd *abfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
unsigned int n_tmask = coff_data (abfd)->local_n_tmask;
|
||
unsigned int n_btshft = coff_data (abfd)->local_n_btshft;
|
||
unsigned int n_btmask = coff_data (abfd)->local_n_btmask;
|
||
bfd_boolean keep_syms;
|
||
bfd_boolean default_copy;
|
||
bfd_size_type symcount;
|
||
struct coff_link_hash_entry **sym_hash;
|
||
bfd_size_type symesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
|
||
bfd_size_type amt;
|
||
|
||
symcount = obj_raw_syment_count (abfd);
|
||
|
||
if (symcount == 0)
|
||
return TRUE; /* Nothing to do. */
|
||
|
||
/* Keep the symbols during this function, in case the linker needs
|
||
to read the generic symbols in order to report an error message. */
|
||
keep_syms = obj_coff_keep_syms (abfd);
|
||
obj_coff_keep_syms (abfd) = TRUE;
|
||
|
||
if (info->keep_memory)
|
||
default_copy = FALSE;
|
||
else
|
||
default_copy = TRUE;
|
||
|
||
/* We keep a list of the linker hash table entries that correspond
|
||
to particular symbols. */
|
||
amt = symcount * sizeof (struct coff_link_hash_entry *);
|
||
sym_hash = bfd_zalloc (abfd, amt);
|
||
if (sym_hash == NULL)
|
||
goto error_return;
|
||
obj_coff_sym_hashes (abfd) = sym_hash;
|
||
|
||
symesz = bfd_coff_symesz (abfd);
|
||
BFD_ASSERT (symesz == bfd_coff_auxesz (abfd));
|
||
esym = (bfd_byte *) obj_coff_external_syms (abfd);
|
||
esym_end = esym + symcount * symesz;
|
||
while (esym < esym_end)
|
||
{
|
||
struct internal_syment sym;
|
||
enum coff_symbol_classification classification;
|
||
bfd_boolean copy;
|
||
|
||
bfd_coff_swap_sym_in (abfd, esym, &sym);
|
||
|
||
classification = bfd_coff_classify_symbol (abfd, &sym);
|
||
if (classification != COFF_SYMBOL_LOCAL)
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
flagword flags;
|
||
asection *section;
|
||
bfd_vma value;
|
||
bfd_boolean addit;
|
||
|
||
/* This symbol is externally visible. */
|
||
|
||
name = _bfd_coff_internal_syment_name (abfd, &sym, buf);
|
||
if (name == NULL)
|
||
goto error_return;
|
||
|
||
/* 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;
|
||
|
||
value = sym.n_value;
|
||
|
||
switch (classification)
|
||
{
|
||
default:
|
||
abort ();
|
||
|
||
case COFF_SYMBOL_GLOBAL:
|
||
flags = BSF_EXPORT | BSF_GLOBAL;
|
||
section = coff_section_from_bfd_index (abfd, sym.n_scnum);
|
||
if (! obj_pe (abfd))
|
||
value -= section->vma;
|
||
break;
|
||
|
||
case COFF_SYMBOL_UNDEFINED:
|
||
flags = 0;
|
||
section = bfd_und_section_ptr;
|
||
break;
|
||
|
||
case COFF_SYMBOL_COMMON:
|
||
flags = BSF_GLOBAL;
|
||
section = bfd_com_section_ptr;
|
||
break;
|
||
|
||
case COFF_SYMBOL_PE_SECTION:
|
||
flags = BSF_SECTION_SYM | BSF_GLOBAL;
|
||
section = coff_section_from_bfd_index (abfd, sym.n_scnum);
|
||
break;
|
||
}
|
||
|
||
if (IS_WEAK_EXTERNAL (abfd, sym))
|
||
flags = BSF_WEAK;
|
||
|
||
addit = TRUE;
|
||
|
||
/* In the PE format, section symbols actually refer to the
|
||
start of the output section. We handle them specially
|
||
here. */
|
||
if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
|
||
{
|
||
*sym_hash = coff_link_hash_lookup (coff_hash_table (info),
|
||
name, FALSE, copy, FALSE);
|
||
if (*sym_hash != NULL)
|
||
{
|
||
if (((*sym_hash)->coff_link_hash_flags
|
||
& COFF_LINK_HASH_PE_SECTION_SYMBOL) == 0
|
||
&& (*sym_hash)->root.type != bfd_link_hash_undefined
|
||
&& (*sym_hash)->root.type != bfd_link_hash_undefweak)
|
||
(*_bfd_error_handler)
|
||
("Warning: symbol `%s' is both section and non-section",
|
||
name);
|
||
|
||
addit = FALSE;
|
||
}
|
||
}
|
||
|
||
/* The Microsoft Visual C compiler does string pooling by
|
||
hashing the constants to an internal symbol name, and
|
||
relying on the linker comdat support to discard
|
||
duplicate names. However, if one string is a literal and
|
||
one is a data initializer, one will end up in the .data
|
||
section and one will end up in the .rdata section. The
|
||
Microsoft linker will combine them into the .data
|
||
section, which seems to be wrong since it might cause the
|
||
literal to change.
|
||
|
||
As long as there are no external references to the
|
||
symbols, which there shouldn't be, we can treat the .data
|
||
and .rdata instances as separate symbols. The comdat
|
||
code in the linker will do the appropriate merging. Here
|
||
we avoid getting a multiple definition error for one of
|
||
these special symbols.
|
||
|
||
FIXME: I don't think this will work in the case where
|
||
there are two object files which use the constants as a
|
||
literal and two object files which use it as a data
|
||
initializer. One or the other of the second object files
|
||
is going to wind up with an inappropriate reference. */
|
||
if (obj_pe (abfd)
|
||
&& (classification == COFF_SYMBOL_GLOBAL
|
||
|| classification == COFF_SYMBOL_PE_SECTION)
|
||
&& coff_section_data (abfd, section) != NULL
|
||
&& coff_section_data (abfd, section)->comdat != NULL
|
||
&& CONST_STRNEQ (name, "??_")
|
||
&& strcmp (name, coff_section_data (abfd, section)->comdat->name) == 0)
|
||
{
|
||
if (*sym_hash == NULL)
|
||
*sym_hash = coff_link_hash_lookup (coff_hash_table (info),
|
||
name, FALSE, copy, FALSE);
|
||
if (*sym_hash != NULL
|
||
&& (*sym_hash)->root.type == bfd_link_hash_defined
|
||
&& coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat != NULL
|
||
&& strcmp (coff_section_data (abfd, (*sym_hash)->root.u.def.section)->comdat->name,
|
||
coff_section_data (abfd, section)->comdat->name) == 0)
|
||
addit = FALSE;
|
||
}
|
||
|
||
if (addit)
|
||
{
|
||
if (! (bfd_coff_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;
|
||
}
|
||
|
||
if (obj_pe (abfd) && (flags & BSF_SECTION_SYM) != 0)
|
||
(*sym_hash)->coff_link_hash_flags |=
|
||
COFF_LINK_HASH_PE_SECTION_SYMBOL;
|
||
|
||
/* Limit the alignment of a common symbol to the possible
|
||
alignment of a section. There is no point to permitting
|
||
a higher alignment for a common symbol: we can not
|
||
guarantee it, and it may cause us to allocate extra space
|
||
in the common section. */
|
||
if (section == bfd_com_section_ptr
|
||
&& (*sym_hash)->root.type == bfd_link_hash_common
|
||
&& ((*sym_hash)->root.u.c.p->alignment_power
|
||
> bfd_coff_default_section_alignment_power (abfd)))
|
||
(*sym_hash)->root.u.c.p->alignment_power
|
||
= bfd_coff_default_section_alignment_power (abfd);
|
||
|
||
if (info->hash->creator->flavour == bfd_get_flavour (abfd))
|
||
{
|
||
/* If we don't have any symbol information currently in
|
||
the hash table, or if we are looking at a symbol
|
||
definition, then update the symbol class and type in
|
||
the hash table. */
|
||
if (((*sym_hash)->class == C_NULL
|
||
&& (*sym_hash)->type == T_NULL)
|
||
|| sym.n_scnum != 0
|
||
|| (sym.n_value != 0
|
||
&& (*sym_hash)->root.type != bfd_link_hash_defined
|
||
&& (*sym_hash)->root.type != bfd_link_hash_defweak))
|
||
{
|
||
(*sym_hash)->class = sym.n_sclass;
|
||
if (sym.n_type != T_NULL)
|
||
{
|
||
/* We want to warn if the type changed, but not
|
||
if it changed from an unspecified type.
|
||
Testing the whole type byte may work, but the
|
||
change from (e.g.) a function of unspecified
|
||
type to function of known type also wants to
|
||
skip the warning. */
|
||
if ((*sym_hash)->type != T_NULL
|
||
&& (*sym_hash)->type != sym.n_type
|
||
&& !(DTYPE ((*sym_hash)->type) == DTYPE (sym.n_type)
|
||
&& (BTYPE ((*sym_hash)->type) == T_NULL
|
||
|| BTYPE (sym.n_type) == T_NULL)))
|
||
(*_bfd_error_handler)
|
||
(_("Warning: type of symbol `%s' changed from %d to %d in %B"),
|
||
abfd, name, (*sym_hash)->type, sym.n_type);
|
||
|
||
/* We don't want to change from a meaningful
|
||
base type to a null one, but if we know
|
||
nothing, take what little we might now know. */
|
||
if (BTYPE (sym.n_type) != T_NULL
|
||
|| (*sym_hash)->type == T_NULL)
|
||
(*sym_hash)->type = sym.n_type;
|
||
}
|
||
(*sym_hash)->auxbfd = abfd;
|
||
if (sym.n_numaux != 0)
|
||
{
|
||
union internal_auxent *alloc;
|
||
unsigned int i;
|
||
bfd_byte *eaux;
|
||
union internal_auxent *iaux;
|
||
|
||
(*sym_hash)->numaux = sym.n_numaux;
|
||
alloc = ((union internal_auxent *)
|
||
bfd_hash_allocate (&info->hash->table,
|
||
(sym.n_numaux
|
||
* sizeof (*alloc))));
|
||
if (alloc == NULL)
|
||
goto error_return;
|
||
for (i = 0, eaux = esym + symesz, iaux = alloc;
|
||
i < sym.n_numaux;
|
||
i++, eaux += symesz, iaux++)
|
||
bfd_coff_swap_aux_in (abfd, eaux, sym.n_type,
|
||
sym.n_sclass, (int) i,
|
||
sym.n_numaux, iaux);
|
||
(*sym_hash)->aux = alloc;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (classification == COFF_SYMBOL_PE_SECTION
|
||
&& (*sym_hash)->numaux != 0)
|
||
{
|
||
/* Some PE sections (such as .bss) have a zero size in
|
||
the section header, but a non-zero size in the AUX
|
||
record. Correct that here.
|
||
|
||
FIXME: This is not at all the right place to do this.
|
||
For example, it won't help objdump. This needs to be
|
||
done when we swap in the section header. */
|
||
BFD_ASSERT ((*sym_hash)->numaux == 1);
|
||
if (section->size == 0)
|
||
section->size = (*sym_hash)->aux[0].x_scn.x_scnlen;
|
||
|
||
/* FIXME: We could test whether the section sizes
|
||
matches the size in the aux entry, but apparently
|
||
that sometimes fails unexpectedly. */
|
||
}
|
||
}
|
||
|
||
esym += (sym.n_numaux + 1) * symesz;
|
||
sym_hash += sym.n_numaux + 1;
|
||
}
|
||
|
||
/* If this is a non-traditional, non-relocatable link, try to
|
||
optimize the handling of any .stab/.stabstr sections. */
|
||
if (! info->relocatable
|
||
&& ! info->traditional_format
|
||
&& info->hash->creator->flavour == bfd_get_flavour (abfd)
|
||
&& (info->strip != strip_all && info->strip != strip_debugger))
|
||
{
|
||
asection *stabstr;
|
||
|
||
stabstr = bfd_get_section_by_name (abfd, ".stabstr");
|
||
|
||
if (stabstr != NULL)
|
||
{
|
||
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]
|
||
|| (stab->name[5] == '.' && ISDIGIT (stab->name[6]))))
|
||
{
|
||
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);
|
||
stab->used_by_bfd = bfd_zalloc (abfd, amt);
|
||
if (stab->used_by_bfd == NULL)
|
||
goto error_return;
|
||
secdata = coff_section_data (abfd, stab);
|
||
}
|
||
|
||
table = coff_hash_table (info);
|
||
|
||
if (! _bfd_link_section_stabs (abfd, &table->stab_info,
|
||
stab, stabstr,
|
||
&secdata->stab_info,
|
||
&string_offset))
|
||
goto error_return;
|
||
}
|
||
}
|
||
}
|
||
|
||
obj_coff_keep_syms (abfd) = keep_syms;
|
||
|
||
return TRUE;
|
||
|
||
error_return:
|
||
obj_coff_keep_syms (abfd) = keep_syms;
|
||
return FALSE;
|
||
}
|
||
|
||
/* Do the final link step. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_final_link (bfd *abfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd_size_type symesz;
|
||
struct coff_final_link_info finfo;
|
||
bfd_boolean debug_merge_allocated;
|
||
bfd_boolean long_section_names;
|
||
asection *o;
|
||
struct bfd_link_order *p;
|
||
bfd_size_type max_sym_count;
|
||
bfd_size_type max_lineno_count;
|
||
bfd_size_type max_reloc_count;
|
||
bfd_size_type max_output_reloc_count;
|
||
bfd_size_type max_contents_size;
|
||
file_ptr rel_filepos;
|
||
unsigned int relsz;
|
||
file_ptr line_filepos;
|
||
unsigned int linesz;
|
||
bfd *sub;
|
||
bfd_byte *external_relocs = NULL;
|
||
char strbuf[STRING_SIZE_SIZE];
|
||
bfd_size_type amt;
|
||
|
||
symesz = bfd_coff_symesz (abfd);
|
||
|
||
finfo.info = info;
|
||
finfo.output_bfd = abfd;
|
||
finfo.strtab = NULL;
|
||
finfo.section_info = NULL;
|
||
finfo.last_file_index = -1;
|
||
finfo.last_bf_index = -1;
|
||
finfo.internal_syms = NULL;
|
||
finfo.sec_ptrs = NULL;
|
||
finfo.sym_indices = NULL;
|
||
finfo.outsyms = NULL;
|
||
finfo.linenos = NULL;
|
||
finfo.contents = NULL;
|
||
finfo.external_relocs = NULL;
|
||
finfo.internal_relocs = NULL;
|
||
finfo.global_to_static = FALSE;
|
||
debug_merge_allocated = FALSE;
|
||
|
||
coff_data (abfd)->link_info = info;
|
||
|
||
finfo.strtab = _bfd_stringtab_init ();
|
||
if (finfo.strtab == NULL)
|
||
goto error_return;
|
||
|
||
if (! coff_debug_merge_hash_table_init (&finfo.debug_merge))
|
||
goto error_return;
|
||
debug_merge_allocated = TRUE;
|
||
|
||
/* Compute the file positions for all the sections. */
|
||
if (! abfd->output_has_begun)
|
||
{
|
||
if (! 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);
|
||
max_contents_size = 0;
|
||
max_lineno_count = 0;
|
||
max_reloc_count = 0;
|
||
|
||
long_section_names = FALSE;
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
o->reloc_count = 0;
|
||
o->lineno_count = 0;
|
||
for (p = o->map_head.link_order; p != NULL; p = p->next)
|
||
{
|
||
if (p->type == bfd_indirect_link_order)
|
||
{
|
||
asection *sec;
|
||
|
||
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;
|
||
|
||
if (info->relocatable)
|
||
o->reloc_count += sec->reloc_count;
|
||
|
||
if (sec->rawsize > max_contents_size)
|
||
max_contents_size = sec->rawsize;
|
||
if (sec->size > max_contents_size)
|
||
max_contents_size = sec->size;
|
||
if (sec->lineno_count > max_lineno_count)
|
||
max_lineno_count = sec->lineno_count;
|
||
if (sec->reloc_count > max_reloc_count)
|
||
max_reloc_count = sec->reloc_count;
|
||
}
|
||
else if (info->relocatable
|
||
&& (p->type == bfd_section_reloc_link_order
|
||
|| p->type == bfd_symbol_reloc_link_order))
|
||
++o->reloc_count;
|
||
}
|
||
if (o->reloc_count == 0)
|
||
o->rel_filepos = 0;
|
||
else
|
||
{
|
||
o->flags |= SEC_RELOC;
|
||
o->rel_filepos = rel_filepos;
|
||
rel_filepos += o->reloc_count * relsz;
|
||
/* In PE COFF, if there are at least 0xffff relocations an
|
||
extra relocation will be written out to encode the count. */
|
||
if (obj_pe (abfd) && o->reloc_count >= 0xffff)
|
||
rel_filepos += relsz;
|
||
}
|
||
|
||
if (bfd_coff_long_section_names (abfd)
|
||
&& strlen (o->name) > SCNNMLEN)
|
||
{
|
||
/* This section has a long name which must go in the string
|
||
table. This must correspond to the code in
|
||
coff_write_object_contents which puts the string index
|
||
into the s_name field of the section header. That is why
|
||
we pass hash as FALSE. */
|
||
if (_bfd_stringtab_add (finfo.strtab, o->name, FALSE, FALSE)
|
||
== (bfd_size_type) -1)
|
||
goto error_return;
|
||
long_section_names = TRUE;
|
||
}
|
||
}
|
||
|
||
/* If doing a relocatable link, allocate space for the pointers we
|
||
need to keep. */
|
||
if (info->relocatable)
|
||
{
|
||
unsigned int i;
|
||
|
||
/* We use section_count + 1, rather than section_count, because
|
||
the target_index fields are 1 based. */
|
||
amt = abfd->section_count + 1;
|
||
amt *= sizeof (struct coff_link_section_info);
|
||
finfo.section_info = bfd_malloc (amt);
|
||
if (finfo.section_info == NULL)
|
||
goto error_return;
|
||
for (i = 0; i <= abfd->section_count; i++)
|
||
{
|
||
finfo.section_info[i].relocs = NULL;
|
||
finfo.section_info[i].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);
|
||
max_output_reloc_count = 0;
|
||
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;
|
||
}
|
||
|
||
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
|
||
table entries. Each entry in the array corresponds to a
|
||
reloc. When we find a reloc against a global symbol, we
|
||
set the corresponding entry in this array so that we can
|
||
fix up the symbol index after we have written out all the
|
||
local symbols.
|
||
|
||
Because of this problem, we also keep the relocs in
|
||
memory until the end of the link. This wastes memory,
|
||
but only when doing a relocatable link, which is not the
|
||
common case. */
|
||
BFD_ASSERT (info->relocatable);
|
||
amt = o->reloc_count;
|
||
amt *= sizeof (struct internal_reloc);
|
||
finfo.section_info[o->target_index].relocs = bfd_malloc (amt);
|
||
amt = o->reloc_count;
|
||
amt *= sizeof (struct coff_link_hash_entry *);
|
||
finfo.section_info[o->target_index].rel_hashes = bfd_malloc (amt);
|
||
if (finfo.section_info[o->target_index].relocs == NULL
|
||
|| finfo.section_info[o->target_index].rel_hashes == NULL)
|
||
goto error_return;
|
||
|
||
if (o->reloc_count > max_output_reloc_count)
|
||
max_output_reloc_count = o->reloc_count;
|
||
}
|
||
|
||
/* Reset the reloc and lineno counts, so that we can use them to
|
||
count the number of entries we have output so far. */
|
||
o->reloc_count = 0;
|
||
o->lineno_count = 0;
|
||
}
|
||
|
||
obj_sym_filepos (abfd) = line_filepos;
|
||
|
||
/* 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. */
|
||
max_sym_count = 0;
|
||
for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
|
||
{
|
||
size_t sz;
|
||
|
||
sub->output_has_begun = FALSE;
|
||
sz = obj_raw_syment_count (sub);
|
||
if (sz > max_sym_count)
|
||
max_sym_count = sz;
|
||
}
|
||
|
||
/* Allocate some buffers used while linking. */
|
||
amt = max_sym_count * sizeof (struct internal_syment);
|
||
finfo.internal_syms = bfd_malloc (amt);
|
||
amt = max_sym_count * sizeof (asection *);
|
||
finfo.sec_ptrs = bfd_malloc (amt);
|
||
amt = max_sym_count * sizeof (long);
|
||
finfo.sym_indices = bfd_malloc (amt);
|
||
finfo.outsyms = bfd_malloc ((max_sym_count + 1) * symesz);
|
||
amt = max_lineno_count * bfd_coff_linesz (abfd);
|
||
finfo.linenos = bfd_malloc (amt);
|
||
finfo.contents = bfd_malloc (max_contents_size);
|
||
amt = max_reloc_count * relsz;
|
||
finfo.external_relocs = bfd_malloc (amt);
|
||
if (! info->relocatable)
|
||
{
|
||
amt = max_reloc_count * sizeof (struct internal_reloc);
|
||
finfo.internal_relocs = bfd_malloc (amt);
|
||
}
|
||
if ((finfo.internal_syms == NULL && max_sym_count > 0)
|
||
|| (finfo.sec_ptrs == 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)
|
||
|| (! info->relocatable
|
||
&& finfo.internal_relocs == NULL
|
||
&& max_reloc_count > 0))
|
||
goto error_return;
|
||
|
||
/* 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
|
||
table in memory as we go along. We process all the relocations
|
||
for a single input file at once. */
|
||
obj_raw_syment_count (abfd) = 0;
|
||
|
||
if (coff_backend_info (abfd)->_bfd_coff_start_final_link)
|
||
{
|
||
if (! bfd_coff_start_final_link (abfd, info))
|
||
goto error_return;
|
||
}
|
||
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
for (p = o->map_head.link_order; p != NULL; p = p->next)
|
||
{
|
||
if (p->type == bfd_indirect_link_order
|
||
&& bfd_family_coff (p->u.indirect.section->owner))
|
||
{
|
||
sub = p->u.indirect.section->owner;
|
||
if (! bfd_coff_link_output_has_begun (sub, & finfo))
|
||
{
|
||
if (! _bfd_coff_link_input_bfd (&finfo, sub))
|
||
goto error_return;
|
||
sub->output_has_begun = TRUE;
|
||
}
|
||
}
|
||
else if (p->type == bfd_section_reloc_link_order
|
||
|| p->type == bfd_symbol_reloc_link_order)
|
||
{
|
||
if (! _bfd_coff_reloc_link_order (abfd, &finfo, o, p))
|
||
goto error_return;
|
||
}
|
||
else
|
||
{
|
||
if (! _bfd_default_link_order (abfd, info, o, p))
|
||
goto error_return;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (! bfd_coff_final_link_postscript (abfd, & finfo))
|
||
goto error_return;
|
||
|
||
/* Free up the buffers used by _bfd_coff_link_input_bfd. */
|
||
|
||
coff_debug_merge_hash_table_free (&finfo.debug_merge);
|
||
debug_merge_allocated = FALSE;
|
||
|
||
if (finfo.internal_syms != NULL)
|
||
{
|
||
free (finfo.internal_syms);
|
||
finfo.internal_syms = NULL;
|
||
}
|
||
if (finfo.sec_ptrs != NULL)
|
||
{
|
||
free (finfo.sec_ptrs);
|
||
finfo.sec_ptrs = NULL;
|
||
}
|
||
if (finfo.sym_indices != NULL)
|
||
{
|
||
free (finfo.sym_indices);
|
||
finfo.sym_indices = NULL;
|
||
}
|
||
if (finfo.linenos != NULL)
|
||
{
|
||
free (finfo.linenos);
|
||
finfo.linenos = NULL;
|
||
}
|
||
if (finfo.contents != NULL)
|
||
{
|
||
free (finfo.contents);
|
||
finfo.contents = NULL;
|
||
}
|
||
if (finfo.external_relocs != NULL)
|
||
{
|
||
free (finfo.external_relocs);
|
||
finfo.external_relocs = NULL;
|
||
}
|
||
if (finfo.internal_relocs != NULL)
|
||
{
|
||
free (finfo.internal_relocs);
|
||
finfo.internal_relocs = NULL;
|
||
}
|
||
|
||
/* The value of the last C_FILE symbol is supposed to be the symbol
|
||
index of the first external symbol. Write it out again if
|
||
necessary. */
|
||
if (finfo.last_file_index != -1
|
||
&& (unsigned int) finfo.last_file.n_value != obj_raw_syment_count (abfd))
|
||
{
|
||
file_ptr pos;
|
||
|
||
finfo.last_file.n_value = obj_raw_syment_count (abfd);
|
||
bfd_coff_swap_sym_out (abfd, &finfo.last_file,
|
||
finfo.outsyms);
|
||
|
||
pos = obj_sym_filepos (abfd) + finfo.last_file_index * symesz;
|
||
if (bfd_seek (abfd, pos, SEEK_SET) != 0
|
||
|| bfd_bwrite (finfo.outsyms, symesz, abfd) != symesz)
|
||
return FALSE;
|
||
}
|
||
|
||
/* If doing task linking (ld --task-link) then make a pass through the
|
||
global symbols, writing out any that are defined, and making them
|
||
static. */
|
||
if (info->task_link)
|
||
{
|
||
finfo.failed = FALSE;
|
||
coff_link_hash_traverse (coff_hash_table (info),
|
||
_bfd_coff_write_task_globals, &finfo);
|
||
if (finfo.failed)
|
||
goto error_return;
|
||
}
|
||
|
||
/* Write out the global symbols. */
|
||
finfo.failed = FALSE;
|
||
coff_link_hash_traverse (coff_hash_table (info),
|
||
_bfd_coff_write_global_sym, &finfo);
|
||
if (finfo.failed)
|
||
goto error_return;
|
||
|
||
/* The outsyms buffer is used by _bfd_coff_write_global_sym. */
|
||
if (finfo.outsyms != NULL)
|
||
{
|
||
free (finfo.outsyms);
|
||
finfo.outsyms = NULL;
|
||
}
|
||
|
||
if (info->relocatable && max_output_reloc_count > 0)
|
||
{
|
||
/* 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. */
|
||
amt = max_output_reloc_count * relsz;
|
||
external_relocs = bfd_malloc (amt);
|
||
if (external_relocs == NULL)
|
||
goto error_return;
|
||
|
||
for (o = abfd->sections; o != NULL; o = o->next)
|
||
{
|
||
struct internal_reloc *irel;
|
||
struct internal_reloc *irelend;
|
||
struct coff_link_hash_entry **rel_hash;
|
||
bfd_byte *erel;
|
||
|
||
if (o->reloc_count == 0)
|
||
continue;
|
||
|
||
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)
|
||
{
|
||
BFD_ASSERT ((*rel_hash)->indx >= 0);
|
||
irel->r_symndx = (*rel_hash)->indx;
|
||
}
|
||
bfd_coff_swap_reloc_out (abfd, irel, erel);
|
||
}
|
||
|
||
if (bfd_seek (abfd, o->rel_filepos, SEEK_SET) != 0)
|
||
goto error_return;
|
||
if (obj_pe (abfd) && o->reloc_count >= 0xffff)
|
||
{
|
||
/* In PE COFF, write the count of relocs as the first
|
||
reloc. The header overflow bit will be set
|
||
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);
|
||
if (bfd_bwrite (excount, relsz, abfd) != relsz)
|
||
/* We'll leak, but it's an error anyway. */
|
||
goto error_return;
|
||
free (excount);
|
||
}
|
||
if (bfd_bwrite (external_relocs,
|
||
(bfd_size_type) relsz * o->reloc_count, abfd)
|
||
!= (bfd_size_type) relsz * o->reloc_count)
|
||
goto error_return;
|
||
}
|
||
|
||
free (external_relocs);
|
||
external_relocs = NULL;
|
||
}
|
||
|
||
/* Free up the section information. */
|
||
if (finfo.section_info != NULL)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < abfd->section_count; i++)
|
||
{
|
||
if (finfo.section_info[i].relocs != NULL)
|
||
free (finfo.section_info[i].relocs);
|
||
if (finfo.section_info[i].rel_hashes != NULL)
|
||
free (finfo.section_info[i].rel_hashes);
|
||
}
|
||
free (finfo.section_info);
|
||
finfo.section_info = NULL;
|
||
}
|
||
|
||
/* If we have optimized stabs strings, output them. */
|
||
if (coff_hash_table (info)->stab_info.stabstr != NULL)
|
||
{
|
||
if (! _bfd_write_stab_strings (abfd, &coff_hash_table (info)->stab_info))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Write out the string table. */
|
||
if (obj_raw_syment_count (abfd) != 0 || long_section_names)
|
||
{
|
||
file_ptr pos;
|
||
|
||
pos = obj_sym_filepos (abfd) + obj_raw_syment_count (abfd) * symesz;
|
||
if (bfd_seek (abfd, pos, SEEK_SET) != 0)
|
||
return FALSE;
|
||
|
||
#if STRING_SIZE_SIZE == 4
|
||
H_PUT_32 (abfd,
|
||
_bfd_stringtab_size (finfo.strtab) + STRING_SIZE_SIZE,
|
||
strbuf);
|
||
#else
|
||
#error Change H_PUT_32 above
|
||
#endif
|
||
|
||
if (bfd_bwrite (strbuf, (bfd_size_type) STRING_SIZE_SIZE, abfd)
|
||
!= STRING_SIZE_SIZE)
|
||
return FALSE;
|
||
|
||
if (! _bfd_stringtab_emit (abfd, finfo.strtab))
|
||
return FALSE;
|
||
|
||
obj_coff_strings_written (abfd) = TRUE;
|
||
}
|
||
|
||
_bfd_stringtab_free (finfo.strtab);
|
||
|
||
/* Setting bfd_get_symcount to 0 will cause write_object_contents to
|
||
not try to write out the symbols. */
|
||
bfd_get_symcount (abfd) = 0;
|
||
|
||
return TRUE;
|
||
|
||
error_return:
|
||
if (debug_merge_allocated)
|
||
coff_debug_merge_hash_table_free (&finfo.debug_merge);
|
||
if (finfo.strtab != NULL)
|
||
_bfd_stringtab_free (finfo.strtab);
|
||
if (finfo.section_info != NULL)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0; i < abfd->section_count; i++)
|
||
{
|
||
if (finfo.section_info[i].relocs != NULL)
|
||
free (finfo.section_info[i].relocs);
|
||
if (finfo.section_info[i].rel_hashes != NULL)
|
||
free (finfo.section_info[i].rel_hashes);
|
||
}
|
||
free (finfo.section_info);
|
||
}
|
||
if (finfo.internal_syms != NULL)
|
||
free (finfo.internal_syms);
|
||
if (finfo.sec_ptrs != NULL)
|
||
free (finfo.sec_ptrs);
|
||
if (finfo.sym_indices != NULL)
|
||
free (finfo.sym_indices);
|
||
if (finfo.outsyms != NULL)
|
||
free (finfo.outsyms);
|
||
if (finfo.linenos != NULL)
|
||
free (finfo.linenos);
|
||
if (finfo.contents != NULL)
|
||
free (finfo.contents);
|
||
if (finfo.external_relocs != NULL)
|
||
free (finfo.external_relocs);
|
||
if (finfo.internal_relocs != NULL)
|
||
free (finfo.internal_relocs);
|
||
if (external_relocs != NULL)
|
||
free (external_relocs);
|
||
return FALSE;
|
||
}
|
||
|
||
/* Parse out a -heap <reserved>,<commit> line. */
|
||
|
||
static char *
|
||
dores_com (char *ptr, bfd *output_bfd, int heap)
|
||
{
|
||
if (coff_data(output_bfd)->pe)
|
||
{
|
||
int val = strtoul (ptr, &ptr, 0);
|
||
|
||
if (heap)
|
||
pe_data(output_bfd)->pe_opthdr.SizeOfHeapReserve = val;
|
||
else
|
||
pe_data(output_bfd)->pe_opthdr.SizeOfStackReserve = val;
|
||
|
||
if (ptr[0] == ',')
|
||
{
|
||
val = strtoul (ptr+1, &ptr, 0);
|
||
if (heap)
|
||
pe_data(output_bfd)->pe_opthdr.SizeOfHeapCommit = val;
|
||
else
|
||
pe_data(output_bfd)->pe_opthdr.SizeOfStackCommit = val;
|
||
}
|
||
}
|
||
return ptr;
|
||
}
|
||
|
||
static char *
|
||
get_name (char *ptr, char **dst)
|
||
{
|
||
while (*ptr == ' ')
|
||
ptr++;
|
||
*dst = ptr;
|
||
while (*ptr && *ptr != ' ')
|
||
ptr++;
|
||
*ptr = 0;
|
||
return ptr+1;
|
||
}
|
||
|
||
/* Process any magic embedded commands in a section called .drectve. */
|
||
|
||
static int
|
||
process_embedded_commands (bfd *output_bfd,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
bfd *abfd)
|
||
{
|
||
asection *sec = bfd_get_section_by_name (abfd, ".drectve");
|
||
char *s;
|
||
char *e;
|
||
bfd_byte *copy;
|
||
|
||
if (!sec)
|
||
return 1;
|
||
|
||
if (!bfd_malloc_and_get_section (abfd, sec, ©))
|
||
{
|
||
if (copy != NULL)
|
||
free (copy);
|
||
return 0;
|
||
}
|
||
e = (char *) copy + sec->size;
|
||
|
||
for (s = (char *) copy; s < e ; )
|
||
{
|
||
if (s[0] != '-')
|
||
{
|
||
s++;
|
||
continue;
|
||
}
|
||
if (CONST_STRNEQ (s, "-attr"))
|
||
{
|
||
char *name;
|
||
char *attribs;
|
||
asection *asec;
|
||
int loop = 1;
|
||
int had_write = 0;
|
||
int had_exec= 0;
|
||
|
||
s += 5;
|
||
s = get_name (s, &name);
|
||
s = get_name (s, &attribs);
|
||
|
||
while (loop)
|
||
{
|
||
switch (*attribs++)
|
||
{
|
||
case 'W':
|
||
had_write = 1;
|
||
break;
|
||
case 'R':
|
||
break;
|
||
case 'S':
|
||
break;
|
||
case 'X':
|
||
had_exec = 1;
|
||
break;
|
||
default:
|
||
loop = 0;
|
||
}
|
||
}
|
||
asec = bfd_get_section_by_name (abfd, name);
|
||
if (asec)
|
||
{
|
||
if (had_exec)
|
||
asec->flags |= SEC_CODE;
|
||
if (!had_write)
|
||
asec->flags |= SEC_READONLY;
|
||
}
|
||
}
|
||
else if (CONST_STRNEQ (s, "-heap"))
|
||
s = dores_com (s + 5, output_bfd, 1);
|
||
|
||
else if (CONST_STRNEQ (s, "-stack"))
|
||
s = dores_com (s + 6, output_bfd, 0);
|
||
|
||
else
|
||
s++;
|
||
}
|
||
free (copy);
|
||
return 1;
|
||
}
|
||
|
||
/* Place a marker against all symbols which are used by relocations.
|
||
This marker can be picked up by the 'do we skip this symbol ?'
|
||
loop in _bfd_coff_link_input_bfd() and used to prevent skipping
|
||
that symbol. */
|
||
|
||
static void
|
||
mark_relocs (struct coff_final_link_info *finfo, bfd *input_bfd)
|
||
{
|
||
asection * a;
|
||
|
||
if ((bfd_get_file_flags (input_bfd) & HAS_SYMS) == 0)
|
||
return;
|
||
|
||
for (a = input_bfd->sections; a != (asection *) NULL; a = a->next)
|
||
{
|
||
struct internal_reloc * internal_relocs;
|
||
struct internal_reloc * irel;
|
||
struct internal_reloc * irelend;
|
||
|
||
if ((a->flags & SEC_RELOC) == 0 || a->reloc_count < 1)
|
||
continue;
|
||
/* Don't mark relocs in excluded sections. */
|
||
if (a->output_section == bfd_abs_section_ptr)
|
||
continue;
|
||
|
||
/* Read in the relocs. */
|
||
internal_relocs = _bfd_coff_read_internal_relocs
|
||
(input_bfd, a, FALSE,
|
||
finfo->external_relocs,
|
||
finfo->info->relocatable,
|
||
(finfo->info->relocatable
|
||
? (finfo->section_info[ a->output_section->target_index ].relocs + a->output_section->reloc_count)
|
||
: finfo->internal_relocs)
|
||
);
|
||
|
||
if (internal_relocs == NULL)
|
||
continue;
|
||
|
||
irel = internal_relocs;
|
||
irelend = irel + a->reloc_count;
|
||
|
||
/* Place a mark in the sym_indices array (whose entries have
|
||
been initialised to 0) for all of the symbols that are used
|
||
in the relocation table. This will then be picked up in the
|
||
skip/don't-skip pass. */
|
||
for (; irel < irelend; irel++)
|
||
finfo->sym_indices[ irel->r_symndx ] = -1;
|
||
}
|
||
}
|
||
|
||
/* Link an input file into the linker output file. This function
|
||
handles all the sections and relocations of the input file at once. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_link_input_bfd (struct coff_final_link_info *finfo, bfd *input_bfd)
|
||
{
|
||
unsigned int n_tmask = coff_data (input_bfd)->local_n_tmask;
|
||
unsigned int n_btshft = coff_data (input_bfd)->local_n_btshft;
|
||
bfd_boolean (*adjust_symndx)
|
||
(bfd *, struct bfd_link_info *, bfd *, asection *,
|
||
struct internal_reloc *, bfd_boolean *);
|
||
bfd *output_bfd;
|
||
const char *strings;
|
||
bfd_size_type syment_base;
|
||
bfd_boolean copy, hash;
|
||
bfd_size_type isymesz;
|
||
bfd_size_type osymesz;
|
||
bfd_size_type linesz;
|
||
bfd_byte *esym;
|
||
bfd_byte *esym_end;
|
||
struct internal_syment *isymp;
|
||
asection **secpp;
|
||
long *indexp;
|
||
unsigned long output_index;
|
||
bfd_byte *outsym;
|
||
struct coff_link_hash_entry **sym_hash;
|
||
asection *o;
|
||
|
||
/* Move all the symbols to the output file. */
|
||
|
||
output_bfd = finfo->output_bfd;
|
||
strings = NULL;
|
||
syment_base = obj_raw_syment_count (output_bfd);
|
||
isymesz = bfd_coff_symesz (input_bfd);
|
||
osymesz = bfd_coff_symesz (output_bfd);
|
||
linesz = bfd_coff_linesz (input_bfd);
|
||
BFD_ASSERT (linesz == bfd_coff_linesz (output_bfd));
|
||
|
||
copy = FALSE;
|
||
if (! finfo->info->keep_memory)
|
||
copy = TRUE;
|
||
hash = TRUE;
|
||
if ((output_bfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
|
||
hash = FALSE;
|
||
|
||
if (! _bfd_coff_get_external_symbols (input_bfd))
|
||
return FALSE;
|
||
|
||
esym = (bfd_byte *) obj_coff_external_syms (input_bfd);
|
||
esym_end = esym + obj_raw_syment_count (input_bfd) * isymesz;
|
||
isymp = finfo->internal_syms;
|
||
secpp = finfo->sec_ptrs;
|
||
indexp = finfo->sym_indices;
|
||
output_index = syment_base;
|
||
outsym = finfo->outsyms;
|
||
|
||
if (coff_data (output_bfd)->pe
|
||
&& ! process_embedded_commands (output_bfd, finfo->info, input_bfd))
|
||
return FALSE;
|
||
|
||
/* If we are going to perform relocations and also strip/discard some
|
||
symbols then we must make sure that we do not strip/discard those
|
||
symbols that are going to be involved in the relocations. */
|
||
if (( finfo->info->strip != strip_none
|
||
|| finfo->info->discard != discard_none)
|
||
&& finfo->info->relocatable)
|
||
{
|
||
/* Mark the symbol array as 'not-used'. */
|
||
memset (indexp, 0, obj_raw_syment_count (input_bfd) * sizeof * indexp);
|
||
|
||
mark_relocs (finfo, input_bfd);
|
||
}
|
||
|
||
while (esym < esym_end)
|
||
{
|
||
struct internal_syment isym;
|
||
enum coff_symbol_classification classification;
|
||
bfd_boolean skip;
|
||
bfd_boolean global;
|
||
bfd_boolean dont_skip_symbol;
|
||
int add;
|
||
|
||
bfd_coff_swap_sym_in (input_bfd, esym, isymp);
|
||
|
||
/* Make a copy of *isymp so that the relocate_section function
|
||
always sees the original values. This is more reliable than
|
||
always recomputing the symbol value even if we are stripping
|
||
the symbol. */
|
||
isym = *isymp;
|
||
|
||
classification = bfd_coff_classify_symbol (input_bfd, &isym);
|
||
switch (classification)
|
||
{
|
||
default:
|
||
abort ();
|
||
case COFF_SYMBOL_GLOBAL:
|
||
case COFF_SYMBOL_PE_SECTION:
|
||
case COFF_SYMBOL_LOCAL:
|
||
*secpp = coff_section_from_bfd_index (input_bfd, isym.n_scnum);
|
||
break;
|
||
case COFF_SYMBOL_COMMON:
|
||
*secpp = bfd_com_section_ptr;
|
||
break;
|
||
case COFF_SYMBOL_UNDEFINED:
|
||
*secpp = bfd_und_section_ptr;
|
||
break;
|
||
}
|
||
|
||
/* Extract the flag indicating if this symbol is used by a
|
||
relocation. */
|
||
if ((finfo->info->strip != strip_none
|
||
|| finfo->info->discard != discard_none)
|
||
&& finfo->info->relocatable)
|
||
dont_skip_symbol = *indexp;
|
||
else
|
||
dont_skip_symbol = FALSE;
|
||
|
||
*indexp = -1;
|
||
|
||
skip = FALSE;
|
||
global = FALSE;
|
||
add = 1 + isym.n_numaux;
|
||
|
||
/* If we are stripping all symbols, we want to skip this one. */
|
||
if (finfo->info->strip == strip_all && ! dont_skip_symbol)
|
||
skip = TRUE;
|
||
|
||
if (! skip)
|
||
{
|
||
switch (classification)
|
||
{
|
||
default:
|
||
abort ();
|
||
case COFF_SYMBOL_GLOBAL:
|
||
case COFF_SYMBOL_COMMON:
|
||
case COFF_SYMBOL_PE_SECTION:
|
||
/* This is a global symbol. Global symbols come at the
|
||
end of the symbol table, so skip them for now.
|
||
Locally defined function symbols, however, are an
|
||
exception, and are not moved to the end. */
|
||
global = TRUE;
|
||
if (! ISFCN (isym.n_type))
|
||
skip = TRUE;
|
||
break;
|
||
|
||
case COFF_SYMBOL_UNDEFINED:
|
||
/* Undefined symbols are left for the end. */
|
||
global = TRUE;
|
||
skip = TRUE;
|
||
break;
|
||
|
||
case COFF_SYMBOL_LOCAL:
|
||
/* This is a local symbol. Skip it if we are discarding
|
||
local symbols. */
|
||
if (finfo->info->discard == discard_all && ! dont_skip_symbol)
|
||
skip = TRUE;
|
||
break;
|
||
}
|
||
}
|
||
|
||
#ifndef COFF_WITH_PE
|
||
/* Skip section symbols for sections which are not going to be
|
||
emitted. */
|
||
if (!skip
|
||
&& dont_skip_symbol == 0
|
||
&& isym.n_sclass == C_STAT
|
||
&& isym.n_type == T_NULL
|
||
&& isym.n_numaux > 0
|
||
&& (*secpp)->output_section == bfd_abs_section_ptr)
|
||
skip = TRUE;
|
||
#endif
|
||
|
||
/* If we stripping debugging symbols, and this is a debugging
|
||
symbol, then skip it. FIXME: gas sets the section to N_ABS
|
||
for some types of debugging symbols; I don't know if this is
|
||
a bug or not. In any case, we handle it here. */
|
||
if (! skip
|
||
&& finfo->info->strip == strip_debugger
|
||
&& ! dont_skip_symbol
|
||
&& (isym.n_scnum == N_DEBUG
|
||
|| (isym.n_scnum == N_ABS
|
||
&& (isym.n_sclass == C_AUTO
|
||
|| isym.n_sclass == C_REG
|
||
|| isym.n_sclass == C_MOS
|
||
|| isym.n_sclass == C_MOE
|
||
|| isym.n_sclass == C_MOU
|
||
|| isym.n_sclass == C_ARG
|
||
|| isym.n_sclass == C_REGPARM
|
||
|| isym.n_sclass == C_FIELD
|
||
|| isym.n_sclass == C_EOS))))
|
||
skip = TRUE;
|
||
|
||
/* If some symbols are stripped based on the name, work out the
|
||
name and decide whether to skip this symbol. */
|
||
if (! skip
|
||
&& (finfo->info->strip == strip_some
|
||
|| finfo->info->discard == discard_l))
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
|
||
name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
|
||
if (! dont_skip_symbol
|
||
&& ((finfo->info->strip == strip_some
|
||
&& (bfd_hash_lookup (finfo->info->keep_hash, name, FALSE,
|
||
FALSE) == NULL))
|
||
|| (! global
|
||
&& finfo->info->discard == discard_l
|
||
&& bfd_is_local_label_name (input_bfd, name))))
|
||
skip = TRUE;
|
||
}
|
||
|
||
/* If this is an enum, struct, or union tag, see if we have
|
||
already output an identical type. */
|
||
if (! skip
|
||
&& (finfo->output_bfd->flags & BFD_TRADITIONAL_FORMAT) == 0
|
||
&& (isym.n_sclass == C_ENTAG
|
||
|| isym.n_sclass == C_STRTAG
|
||
|| isym.n_sclass == C_UNTAG)
|
||
&& isym.n_numaux == 1)
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
struct coff_debug_merge_hash_entry *mh;
|
||
struct coff_debug_merge_type *mt;
|
||
union internal_auxent aux;
|
||
struct coff_debug_merge_element **epp;
|
||
bfd_byte *esl, *eslend;
|
||
struct internal_syment *islp;
|
||
bfd_size_type amt;
|
||
|
||
name = _bfd_coff_internal_syment_name (input_bfd, &isym, buf);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
|
||
/* Ignore fake names invented by compiler; treat them all as
|
||
the same name. */
|
||
if (*name == '~' || *name == '.' || *name == '$'
|
||
|| (*name == bfd_get_symbol_leading_char (input_bfd)
|
||
&& (name[1] == '~' || name[1] == '.' || name[1] == '$')))
|
||
name = "";
|
||
|
||
mh = coff_debug_merge_hash_lookup (&finfo->debug_merge, name,
|
||
TRUE, TRUE);
|
||
if (mh == NULL)
|
||
return FALSE;
|
||
|
||
/* Allocate memory to hold type information. If this turns
|
||
out to be a duplicate, we pass this address to
|
||
bfd_release. */
|
||
amt = sizeof (struct coff_debug_merge_type);
|
||
mt = bfd_alloc (input_bfd, amt);
|
||
if (mt == NULL)
|
||
return FALSE;
|
||
mt->class = isym.n_sclass;
|
||
|
||
/* Pick up the aux entry, which points to the end of the tag
|
||
entries. */
|
||
bfd_coff_swap_aux_in (input_bfd, (esym + isymesz),
|
||
isym.n_type, isym.n_sclass, 0, isym.n_numaux,
|
||
&aux);
|
||
|
||
/* Gather the elements. */
|
||
epp = &mt->elements;
|
||
mt->elements = NULL;
|
||
islp = isymp + 2;
|
||
esl = esym + 2 * isymesz;
|
||
eslend = ((bfd_byte *) obj_coff_external_syms (input_bfd)
|
||
+ aux.x_sym.x_fcnary.x_fcn.x_endndx.l * isymesz);
|
||
while (esl < eslend)
|
||
{
|
||
const char *elename;
|
||
char elebuf[SYMNMLEN + 1];
|
||
char *name_copy;
|
||
|
||
bfd_coff_swap_sym_in (input_bfd, esl, islp);
|
||
|
||
amt = sizeof (struct coff_debug_merge_element);
|
||
*epp = bfd_alloc (input_bfd, amt);
|
||
if (*epp == NULL)
|
||
return FALSE;
|
||
|
||
elename = _bfd_coff_internal_syment_name (input_bfd, islp,
|
||
elebuf);
|
||
if (elename == NULL)
|
||
return FALSE;
|
||
|
||
amt = strlen (elename) + 1;
|
||
name_copy = bfd_alloc (input_bfd, amt);
|
||
if (name_copy == NULL)
|
||
return FALSE;
|
||
strcpy (name_copy, elename);
|
||
|
||
(*epp)->name = name_copy;
|
||
(*epp)->type = islp->n_type;
|
||
(*epp)->tagndx = 0;
|
||
if (islp->n_numaux >= 1
|
||
&& islp->n_type != T_NULL
|
||
&& islp->n_sclass != C_EOS)
|
||
{
|
||
union internal_auxent eleaux;
|
||
long indx;
|
||
|
||
bfd_coff_swap_aux_in (input_bfd, (esl + isymesz),
|
||
islp->n_type, islp->n_sclass, 0,
|
||
islp->n_numaux, &eleaux);
|
||
indx = eleaux.x_sym.x_tagndx.l;
|
||
|
||
/* FIXME: If this tagndx entry refers to a symbol
|
||
defined later in this file, we just ignore it.
|
||
Handling this correctly would be tedious, and may
|
||
not be required. */
|
||
if (indx > 0
|
||
&& (indx
|
||
< ((esym -
|
||
(bfd_byte *) obj_coff_external_syms (input_bfd))
|
||
/ (long) isymesz)))
|
||
{
|
||
(*epp)->tagndx = finfo->sym_indices[indx];
|
||
if ((*epp)->tagndx < 0)
|
||
(*epp)->tagndx = 0;
|
||
}
|
||
}
|
||
epp = &(*epp)->next;
|
||
*epp = NULL;
|
||
|
||
esl += (islp->n_numaux + 1) * isymesz;
|
||
islp += islp->n_numaux + 1;
|
||
}
|
||
|
||
/* See if we already have a definition which matches this
|
||
type. We always output the type if it has no elements,
|
||
for simplicity. */
|
||
if (mt->elements == NULL)
|
||
bfd_release (input_bfd, mt);
|
||
else
|
||
{
|
||
struct coff_debug_merge_type *mtl;
|
||
|
||
for (mtl = mh->types; mtl != NULL; mtl = mtl->next)
|
||
{
|
||
struct coff_debug_merge_element *me, *mel;
|
||
|
||
if (mtl->class != mt->class)
|
||
continue;
|
||
|
||
for (me = mt->elements, mel = mtl->elements;
|
||
me != NULL && mel != NULL;
|
||
me = me->next, mel = mel->next)
|
||
{
|
||
if (strcmp (me->name, mel->name) != 0
|
||
|| me->type != mel->type
|
||
|| me->tagndx != mel->tagndx)
|
||
break;
|
||
}
|
||
|
||
if (me == NULL && mel == NULL)
|
||
break;
|
||
}
|
||
|
||
if (mtl == NULL || (bfd_size_type) mtl->indx >= syment_base)
|
||
{
|
||
/* This is the first definition of this type. */
|
||
mt->indx = output_index;
|
||
mt->next = mh->types;
|
||
mh->types = mt;
|
||
}
|
||
else
|
||
{
|
||
/* This is a redefinition which can be merged. */
|
||
bfd_release (input_bfd, mt);
|
||
*indexp = mtl->indx;
|
||
add = (eslend - esym) / isymesz;
|
||
skip = TRUE;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We now know whether we are to skip this symbol or not. */
|
||
if (! skip)
|
||
{
|
||
/* Adjust the symbol in order to output it. */
|
||
|
||
if (isym._n._n_n._n_zeroes == 0
|
||
&& isym._n._n_n._n_offset != 0)
|
||
{
|
||
const char *name;
|
||
bfd_size_type indx;
|
||
|
||
/* This symbol has a long name. Enter it in the string
|
||
table we are building. Note that we do not check
|
||
bfd_coff_symname_in_debug. That is only true for
|
||
XCOFF, and XCOFF requires different linking code
|
||
anyhow. */
|
||
name = _bfd_coff_internal_syment_name (input_bfd, &isym, NULL);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
indx = _bfd_stringtab_add (finfo->strtab, name, hash, copy);
|
||
if (indx == (bfd_size_type) -1)
|
||
return FALSE;
|
||
isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
|
||
switch (isym.n_sclass)
|
||
{
|
||
case C_AUTO:
|
||
case C_MOS:
|
||
case C_EOS:
|
||
case C_MOE:
|
||
case C_MOU:
|
||
case C_UNTAG:
|
||
case C_STRTAG:
|
||
case C_ENTAG:
|
||
case C_TPDEF:
|
||
case C_ARG:
|
||
case C_USTATIC:
|
||
case C_REG:
|
||
case C_REGPARM:
|
||
case C_FIELD:
|
||
/* The symbol value should not be modified. */
|
||
break;
|
||
|
||
case C_FCN:
|
||
if (obj_pe (input_bfd)
|
||
&& strcmp (isym.n_name, ".bf") != 0
|
||
&& isym.n_scnum > 0)
|
||
{
|
||
/* For PE, .lf and .ef get their value left alone,
|
||
while .bf gets relocated. However, they all have
|
||
"real" section numbers, and need to be moved into
|
||
the new section. */
|
||
isym.n_scnum = (*secpp)->output_section->target_index;
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
default:
|
||
case C_LABEL: /* Not completely sure about these 2 */
|
||
case C_EXTDEF:
|
||
case C_BLOCK:
|
||
case C_EFCN:
|
||
case C_NULL:
|
||
case C_EXT:
|
||
case C_STAT:
|
||
case C_SECTION:
|
||
case C_NT_WEAK:
|
||
/* Compute new symbol location. */
|
||
if (isym.n_scnum > 0)
|
||
{
|
||
isym.n_scnum = (*secpp)->output_section->target_index;
|
||
isym.n_value += (*secpp)->output_offset;
|
||
if (! obj_pe (input_bfd))
|
||
isym.n_value -= (*secpp)->vma;
|
||
if (! obj_pe (finfo->output_bfd))
|
||
isym.n_value += (*secpp)->output_section->vma;
|
||
}
|
||
break;
|
||
|
||
case C_FILE:
|
||
/* The value of a C_FILE symbol is the symbol index of
|
||
the next C_FILE symbol. The value of the last C_FILE
|
||
symbol is the symbol index to the first external
|
||
symbol (actually, coff_renumber_symbols does not get
|
||
this right--it just sets the value of the last C_FILE
|
||
symbol to zero--and nobody has ever complained about
|
||
it). We try to get this right, below, just before we
|
||
write the symbols out, but in the general case we may
|
||
have to write the symbol out twice. */
|
||
if (finfo->last_file_index != -1
|
||
&& finfo->last_file.n_value != (bfd_vma) output_index)
|
||
{
|
||
/* We must correct the value of the last C_FILE
|
||
entry. */
|
||
finfo->last_file.n_value = output_index;
|
||
if ((bfd_size_type) finfo->last_file_index >= syment_base)
|
||
{
|
||
/* The last C_FILE symbol is in this input file. */
|
||
bfd_coff_swap_sym_out (output_bfd,
|
||
&finfo->last_file,
|
||
(finfo->outsyms
|
||
+ ((finfo->last_file_index
|
||
- syment_base)
|
||
* osymesz)));
|
||
}
|
||
else
|
||
{
|
||
file_ptr pos;
|
||
|
||
/* We have already written out the last C_FILE
|
||
symbol. We need to write it out again. We
|
||
borrow *outsym temporarily. */
|
||
bfd_coff_swap_sym_out (output_bfd,
|
||
&finfo->last_file, outsym);
|
||
pos = obj_sym_filepos (output_bfd);
|
||
pos += finfo->last_file_index * osymesz;
|
||
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
|
||
|| bfd_bwrite (outsym, osymesz, output_bfd) != osymesz)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
finfo->last_file_index = output_index;
|
||
finfo->last_file = isym;
|
||
break;
|
||
}
|
||
|
||
/* If doing task linking, convert normal global function symbols to
|
||
static functions. */
|
||
if (finfo->info->task_link && IS_EXTERNAL (input_bfd, isym))
|
||
isym.n_sclass = C_STAT;
|
||
|
||
/* Output the symbol. */
|
||
bfd_coff_swap_sym_out (output_bfd, &isym, outsym);
|
||
|
||
*indexp = output_index;
|
||
|
||
if (global)
|
||
{
|
||
long indx;
|
||
struct coff_link_hash_entry *h;
|
||
|
||
indx = ((esym - (bfd_byte *) obj_coff_external_syms (input_bfd))
|
||
/ isymesz);
|
||
h = obj_coff_sym_hashes (input_bfd)[indx];
|
||
if (h == NULL)
|
||
{
|
||
/* This can happen if there were errors earlier in
|
||
the link. */
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
h->indx = output_index;
|
||
}
|
||
|
||
output_index += add;
|
||
outsym += add * osymesz;
|
||
}
|
||
|
||
esym += add * isymesz;
|
||
isymp += add;
|
||
++secpp;
|
||
++indexp;
|
||
for (--add; add > 0; --add)
|
||
{
|
||
*secpp++ = NULL;
|
||
*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. */
|
||
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;
|
||
sym_hash = obj_coff_sym_hashes (input_bfd);
|
||
outsym = finfo->outsyms;
|
||
|
||
while (esym < esym_end)
|
||
{
|
||
int add;
|
||
|
||
add = 1 + isymp->n_numaux;
|
||
|
||
if ((*indexp < 0
|
||
|| (bfd_size_type) *indexp < syment_base)
|
||
&& (*sym_hash == NULL
|
||
|| (*sym_hash)->auxbfd != input_bfd))
|
||
esym += add * isymesz;
|
||
else
|
||
{
|
||
struct coff_link_hash_entry *h;
|
||
int i;
|
||
|
||
h = NULL;
|
||
if (*indexp < 0)
|
||
{
|
||
h = *sym_hash;
|
||
|
||
/* The m68k-motorola-sysv assembler will sometimes
|
||
generate two symbols with the same name, but only one
|
||
will have aux entries. */
|
||
BFD_ASSERT (isymp->n_numaux == 0
|
||
|| h->numaux == 0
|
||
|| h->numaux == isymp->n_numaux);
|
||
}
|
||
|
||
esym += isymesz;
|
||
|
||
if (h == NULL)
|
||
outsym += osymesz;
|
||
|
||
/* Handle the aux entries. This handling is based on
|
||
coff_pointerize_aux. I don't know if it always correct. */
|
||
for (i = 0; i < isymp->n_numaux && esym < esym_end; i++)
|
||
{
|
||
union internal_auxent aux;
|
||
union internal_auxent *auxp;
|
||
|
||
if (h != NULL && h->aux != NULL && (h->numaux > i))
|
||
auxp = h->aux + i;
|
||
else
|
||
{
|
||
bfd_coff_swap_aux_in (input_bfd, esym, isymp->n_type,
|
||
isymp->n_sclass, i, isymp->n_numaux, &aux);
|
||
auxp = &aux;
|
||
}
|
||
|
||
if (isymp->n_sclass == C_FILE)
|
||
{
|
||
/* If this is a long filename, we must put it in the
|
||
string table. */
|
||
if (auxp->x_file.x_n.x_zeroes == 0
|
||
&& auxp->x_file.x_n.x_offset != 0)
|
||
{
|
||
const char *filename;
|
||
bfd_size_type indx;
|
||
|
||
BFD_ASSERT (auxp->x_file.x_n.x_offset
|
||
>= STRING_SIZE_SIZE);
|
||
if (strings == NULL)
|
||
{
|
||
strings = _bfd_coff_read_string_table (input_bfd);
|
||
if (strings == NULL)
|
||
return FALSE;
|
||
}
|
||
filename = strings + auxp->x_file.x_n.x_offset;
|
||
indx = _bfd_stringtab_add (finfo->strtab, filename,
|
||
hash, copy);
|
||
if (indx == (bfd_size_type) -1)
|
||
return FALSE;
|
||
auxp->x_file.x_n.x_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
}
|
||
else if ((isymp->n_sclass != C_STAT || isymp->n_type != T_NULL)
|
||
&& isymp->n_sclass != C_NT_WEAK)
|
||
{
|
||
unsigned long indx;
|
||
|
||
if (ISFCN (isymp->n_type)
|
||
|| ISTAG (isymp->n_sclass)
|
||
|| isymp->n_sclass == C_BLOCK
|
||
|| isymp->n_sclass == C_FCN)
|
||
{
|
||
indx = auxp->x_sym.x_fcnary.x_fcn.x_endndx.l;
|
||
if (indx > 0
|
||
&& indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
/* We look forward through the symbol for
|
||
the index of the next symbol we are going
|
||
to include. I don't know if this is
|
||
entirely right. */
|
||
while ((finfo->sym_indices[indx] < 0
|
||
|| ((bfd_size_type) finfo->sym_indices[indx]
|
||
< syment_base))
|
||
&& indx < obj_raw_syment_count (input_bfd))
|
||
++indx;
|
||
if (indx >= obj_raw_syment_count (input_bfd))
|
||
indx = output_index;
|
||
else
|
||
indx = finfo->sym_indices[indx];
|
||
auxp->x_sym.x_fcnary.x_fcn.x_endndx.l = indx;
|
||
}
|
||
}
|
||
|
||
indx = auxp->x_sym.x_tagndx.l;
|
||
if (indx > 0 && indx < obj_raw_syment_count (input_bfd))
|
||
{
|
||
long symindx;
|
||
|
||
symindx = finfo->sym_indices[indx];
|
||
if (symindx < 0)
|
||
auxp->x_sym.x_tagndx.l = 0;
|
||
else
|
||
auxp->x_sym.x_tagndx.l = symindx;
|
||
}
|
||
|
||
/* The .bf symbols are supposed to be linked through
|
||
the endndx field. We need to carry this list
|
||
across object files. */
|
||
if (i == 0
|
||
&& h == NULL
|
||
&& isymp->n_sclass == C_FCN
|
||
&& (isymp->_n._n_n._n_zeroes != 0
|
||
|| isymp->_n._n_n._n_offset == 0)
|
||
&& isymp->_n._n_name[0] == '.'
|
||
&& isymp->_n._n_name[1] == 'b'
|
||
&& isymp->_n._n_name[2] == 'f'
|
||
&& isymp->_n._n_name[3] == '\0')
|
||
{
|
||
if (finfo->last_bf_index != -1)
|
||
{
|
||
finfo->last_bf.x_sym.x_fcnary.x_fcn.x_endndx.l =
|
||
*indexp;
|
||
|
||
if ((bfd_size_type) finfo->last_bf_index
|
||
>= syment_base)
|
||
{
|
||
void *auxout;
|
||
|
||
/* The last .bf symbol is in this input
|
||
file. This will only happen if the
|
||
assembler did not set up the .bf
|
||
endndx symbols correctly. */
|
||
auxout = (finfo->outsyms
|
||
+ ((finfo->last_bf_index
|
||
- syment_base)
|
||
* osymesz));
|
||
|
||
bfd_coff_swap_aux_out (output_bfd,
|
||
&finfo->last_bf,
|
||
isymp->n_type,
|
||
isymp->n_sclass,
|
||
0, isymp->n_numaux,
|
||
auxout);
|
||
}
|
||
else
|
||
{
|
||
file_ptr pos;
|
||
|
||
/* We have already written out the last
|
||
.bf aux entry. We need to write it
|
||
out again. We borrow *outsym
|
||
temporarily. FIXME: This case should
|
||
be made faster. */
|
||
bfd_coff_swap_aux_out (output_bfd,
|
||
&finfo->last_bf,
|
||
isymp->n_type,
|
||
isymp->n_sclass,
|
||
0, isymp->n_numaux,
|
||
outsym);
|
||
pos = obj_sym_filepos (output_bfd);
|
||
pos += finfo->last_bf_index * osymesz;
|
||
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
|
||
|| (bfd_bwrite (outsym, osymesz, output_bfd)
|
||
!= osymesz))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (auxp->x_sym.x_fcnary.x_fcn.x_endndx.l != 0)
|
||
finfo->last_bf_index = -1;
|
||
else
|
||
{
|
||
/* The endndx field of this aux entry must
|
||
be updated with the symbol number of the
|
||
next .bf symbol. */
|
||
finfo->last_bf = *auxp;
|
||
finfo->last_bf_index = (((outsym - finfo->outsyms)
|
||
/ osymesz)
|
||
+ syment_base);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (h == NULL)
|
||
{
|
||
bfd_coff_swap_aux_out (output_bfd, auxp, isymp->n_type,
|
||
isymp->n_sclass, i, isymp->n_numaux,
|
||
outsym);
|
||
outsym += osymesz;
|
||
}
|
||
|
||
esym += isymesz;
|
||
}
|
||
}
|
||
|
||
indexp += add;
|
||
isymp += add;
|
||
sym_hash += 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;
|
||
bfd_byte *oeline;
|
||
bfd_boolean skipping;
|
||
file_ptr pos;
|
||
bfd_size_type amt;
|
||
|
||
/* FIXME: If SEC_HAS_CONTENTS is not 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_coff_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_bread (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;
|
||
oeline = finfo->linenos;
|
||
elineend = eline + linesz * o->lineno_count;
|
||
skipping = FALSE;
|
||
for (; eline < elineend; eline += linesz)
|
||
{
|
||
struct internal_lineno iline;
|
||
|
||
bfd_coff_swap_lineno_in (input_bfd, eline, &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)))
|
||
{
|
||
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 must discard the
|
||
line numbers because reading them back with
|
||
no associated symbol (or associating them all
|
||
with symbol #0) will fail. We can't regain
|
||
the space in the output file, but at least
|
||
they're dense. */
|
||
skipping = TRUE;
|
||
}
|
||
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,
|
||
(finfo->outsyms
|
||
+ ((indx - syment_base)
|
||
* osymesz)), &is);
|
||
if ((ISFCN (is.n_type)
|
||
|| is.n_sclass == C_BLOCK)
|
||
&& is.n_numaux >= 1)
|
||
{
|
||
void *auxptr;
|
||
|
||
auxptr = (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, &ia);
|
||
ia.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, &ia,
|
||
is.n_type, is.n_sclass, 0,
|
||
is.n_numaux, auxptr);
|
||
}
|
||
|
||
skipping = FALSE;
|
||
}
|
||
|
||
iline.l_addr.l_symndx = indx;
|
||
}
|
||
|
||
if (!skipping)
|
||
{
|
||
bfd_coff_swap_lineno_out (output_bfd, &iline, oeline);
|
||
oeline += linesz;
|
||
}
|
||
}
|
||
|
||
pos = o->output_section->line_filepos;
|
||
pos += o->output_section->lineno_count * linesz;
|
||
amt = oeline - finfo->linenos;
|
||
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
|
||
|| bfd_bwrite (finfo->linenos, amt, output_bfd) != amt)
|
||
return FALSE;
|
||
|
||
o->output_section->lineno_count += amt / linesz;
|
||
}
|
||
}
|
||
|
||
/* If we swapped out a C_FILE symbol, guess that the next C_FILE
|
||
symbol will be the first symbol in the next input file. In the
|
||
normal case, this will save us from writing out the C_FILE symbol
|
||
again. */
|
||
if (finfo->last_file_index != -1
|
||
&& (bfd_size_type) finfo->last_file_index >= syment_base)
|
||
{
|
||
finfo->last_file.n_value = output_index;
|
||
bfd_coff_swap_sym_out (output_bfd, &finfo->last_file,
|
||
(finfo->outsyms
|
||
+ ((finfo->last_file_index - syment_base)
|
||
* osymesz)));
|
||
}
|
||
|
||
/* Write the modified symbols to the output file. */
|
||
if (outsym > finfo->outsyms)
|
||
{
|
||
file_ptr pos;
|
||
bfd_size_type amt;
|
||
|
||
pos = obj_sym_filepos (output_bfd) + syment_base * osymesz;
|
||
amt = outsym - finfo->outsyms;
|
||
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
|
||
|| bfd_bwrite (finfo->outsyms, amt, output_bfd) != amt)
|
||
return FALSE;
|
||
|
||
BFD_ASSERT ((obj_raw_syment_count (output_bfd)
|
||
+ (outsym - finfo->outsyms) / osymesz)
|
||
== output_index);
|
||
|
||
obj_raw_syment_count (output_bfd) = output_index;
|
||
}
|
||
|
||
/* Relocate the contents of each section. */
|
||
adjust_symndx = coff_backend_info (input_bfd)->_bfd_coff_adjust_symndx;
|
||
for (o = input_bfd->sections; o != NULL; o = o->next)
|
||
{
|
||
bfd_byte *contents;
|
||
struct coff_section_tdata *secdata;
|
||
|
||
if (! o->linker_mark)
|
||
/* This section was omitted from the link. */
|
||
continue;
|
||
|
||
if ((o->flags & SEC_LINKER_CREATED) != 0)
|
||
continue;
|
||
|
||
if ((o->flags & SEC_HAS_CONTENTS) == 0
|
||
|| (o->size == 0 && (o->flags & SEC_RELOC) == 0))
|
||
{
|
||
if ((o->flags & SEC_RELOC) != 0
|
||
&& o->reloc_count != 0)
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B: relocs in section `%A', but it has no contents"),
|
||
input_bfd, o);
|
||
bfd_set_error (bfd_error_no_contents);
|
||
return FALSE;
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
secdata = coff_section_data (input_bfd, o);
|
||
if (secdata != NULL && secdata->contents != NULL)
|
||
contents = secdata->contents;
|
||
else
|
||
{
|
||
bfd_size_type x = o->rawsize ? o->rawsize : o->size;
|
||
if (! bfd_get_section_contents (input_bfd, o, finfo->contents, 0, x))
|
||
return FALSE;
|
||
contents = finfo->contents;
|
||
}
|
||
|
||
if ((o->flags & SEC_RELOC) != 0)
|
||
{
|
||
int target_index;
|
||
struct internal_reloc *internal_relocs;
|
||
struct internal_reloc *irel;
|
||
|
||
/* Read in the relocs. */
|
||
target_index = o->output_section->target_index;
|
||
internal_relocs = (_bfd_coff_read_internal_relocs
|
||
(input_bfd, o, FALSE, finfo->external_relocs,
|
||
finfo->info->relocatable,
|
||
(finfo->info->relocatable
|
||
? (finfo->section_info[target_index].relocs
|
||
+ o->output_section->reloc_count)
|
||
: finfo->internal_relocs)));
|
||
if (internal_relocs == NULL)
|
||
return FALSE;
|
||
|
||
/* Call processor specific code to relocate the section
|
||
contents. */
|
||
if (! bfd_coff_relocate_section (output_bfd, finfo->info,
|
||
input_bfd, o,
|
||
contents,
|
||
internal_relocs,
|
||
finfo->internal_syms,
|
||
finfo->sec_ptrs))
|
||
return FALSE;
|
||
|
||
if (finfo->info->relocatable)
|
||
{
|
||
bfd_vma offset;
|
||
struct internal_reloc *irelend;
|
||
struct coff_link_hash_entry **rel_hash;
|
||
|
||
offset = o->output_section->vma + o->output_offset - o->vma;
|
||
irel = internal_relocs;
|
||
irelend = irel + o->reloc_count;
|
||
rel_hash = (finfo->section_info[target_index].rel_hashes
|
||
+ o->output_section->reloc_count);
|
||
for (; irel < irelend; irel++, rel_hash++)
|
||
{
|
||
struct coff_link_hash_entry *h;
|
||
bfd_boolean adjusted;
|
||
|
||
*rel_hash = NULL;
|
||
|
||
/* Adjust the reloc address and symbol index. */
|
||
irel->r_vaddr += offset;
|
||
|
||
if (irel->r_symndx == -1)
|
||
continue;
|
||
|
||
if (adjust_symndx)
|
||
{
|
||
if (! (*adjust_symndx) (output_bfd, finfo->info,
|
||
input_bfd, o, irel,
|
||
&adjusted))
|
||
return FALSE;
|
||
if (adjusted)
|
||
continue;
|
||
}
|
||
|
||
h = obj_coff_sym_hashes (input_bfd)[irel->r_symndx];
|
||
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
|
||
{
|
||
long indx;
|
||
|
||
indx = finfo->sym_indices[irel->r_symndx];
|
||
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. This should have been handled
|
||
by the 'dont_skip_symbol' code in the while
|
||
loop at the top of this function. */
|
||
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;
|
||
}
|
||
}
|
||
}
|
||
|
||
o->output_section->reloc_count += o->reloc_count;
|
||
}
|
||
}
|
||
|
||
/* Write out the modified section contents. */
|
||
if (secdata == NULL || secdata->stab_info == NULL)
|
||
{
|
||
file_ptr loc = o->output_offset * bfd_octets_per_byte (output_bfd);
|
||
if (! bfd_set_section_contents (output_bfd, o->output_section,
|
||
contents, loc, o->size))
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
if (! (_bfd_write_section_stabs
|
||
(output_bfd, &coff_hash_table (finfo->info)->stab_info,
|
||
o, &secdata->stab_info, contents)))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (! finfo->info->keep_memory
|
||
&& ! _bfd_coff_free_symbols (input_bfd))
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Write out a global symbol. Called via coff_link_hash_traverse. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_write_global_sym (struct coff_link_hash_entry *h, void *data)
|
||
{
|
||
struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
|
||
bfd *output_bfd;
|
||
struct internal_syment isym;
|
||
bfd_size_type symesz;
|
||
unsigned int i;
|
||
file_ptr pos;
|
||
|
||
output_bfd = finfo->output_bfd;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
{
|
||
h = (struct coff_link_hash_entry *) h->root.u.i.link;
|
||
if (h->root.type == bfd_link_hash_new)
|
||
return TRUE;
|
||
}
|
||
|
||
if (h->indx >= 0)
|
||
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))))
|
||
return TRUE;
|
||
|
||
switch (h->root.type)
|
||
{
|
||
default:
|
||
case bfd_link_hash_new:
|
||
case bfd_link_hash_warning:
|
||
abort ();
|
||
return FALSE;
|
||
|
||
case bfd_link_hash_undefined:
|
||
case bfd_link_hash_undefweak:
|
||
isym.n_scnum = N_UNDEF;
|
||
isym.n_value = 0;
|
||
break;
|
||
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.def.section->output_section;
|
||
if (bfd_is_abs_section (sec))
|
||
isym.n_scnum = N_ABS;
|
||
else
|
||
isym.n_scnum = sec->target_index;
|
||
isym.n_value = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_offset);
|
||
if (! obj_pe (finfo->output_bfd))
|
||
isym.n_value += sec->vma;
|
||
}
|
||
break;
|
||
|
||
case bfd_link_hash_common:
|
||
isym.n_scnum = N_UNDEF;
|
||
isym.n_value = h->root.u.c.size;
|
||
break;
|
||
|
||
case bfd_link_hash_indirect:
|
||
/* Just ignore these. They can't be handled anyhow. */
|
||
return TRUE;
|
||
}
|
||
|
||
if (strlen (h->root.root.string) <= SYMNMLEN)
|
||
strncpy (isym._n._n_name, h->root.root.string, SYMNMLEN);
|
||
else
|
||
{
|
||
bfd_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)
|
||
{
|
||
finfo->failed = TRUE;
|
||
return FALSE;
|
||
}
|
||
isym._n._n_n._n_zeroes = 0;
|
||
isym._n._n_n._n_offset = STRING_SIZE_SIZE + indx;
|
||
}
|
||
|
||
isym.n_sclass = h->class;
|
||
isym.n_type = h->type;
|
||
|
||
if (isym.n_sclass == C_NULL)
|
||
isym.n_sclass = C_EXT;
|
||
|
||
/* If doing task linking and this is the pass where we convert
|
||
defined globals to statics, then do that conversion now. If the
|
||
symbol is not being converted, just ignore it and it will be
|
||
output during a later pass. */
|
||
if (finfo->global_to_static)
|
||
{
|
||
if (! IS_EXTERNAL (output_bfd, isym))
|
||
return TRUE;
|
||
|
||
isym.n_sclass = C_STAT;
|
||
}
|
||
|
||
/* When a weak symbol is not overridden by a strong one,
|
||
turn it into an external symbol when not building a
|
||
shared or relocatable object. */
|
||
if (! finfo->info->shared
|
||
&& ! finfo->info->relocatable
|
||
&& IS_WEAK_EXTERNAL (finfo->output_bfd, isym))
|
||
isym.n_sclass = C_EXT;
|
||
|
||
isym.n_numaux = h->numaux;
|
||
|
||
bfd_coff_swap_sym_out (output_bfd, &isym, finfo->outsyms);
|
||
|
||
symesz = bfd_coff_symesz (output_bfd);
|
||
|
||
pos = obj_sym_filepos (output_bfd);
|
||
pos += obj_raw_syment_count (output_bfd) * symesz;
|
||
if (bfd_seek (output_bfd, pos, SEEK_SET) != 0
|
||
|| bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
|
||
{
|
||
finfo->failed = TRUE;
|
||
return FALSE;
|
||
}
|
||
|
||
h->indx = obj_raw_syment_count (output_bfd);
|
||
|
||
++obj_raw_syment_count (output_bfd);
|
||
|
||
/* Write out any associated aux entries. Most of the aux entries
|
||
will have been modified in _bfd_coff_link_input_bfd. We have to
|
||
handle section aux entries here, now that we have the final
|
||
relocation and line number counts. */
|
||
for (i = 0; i < isym.n_numaux; i++)
|
||
{
|
||
union internal_auxent *auxp;
|
||
|
||
auxp = h->aux + i;
|
||
|
||
/* Look for a section aux entry here using the same tests that
|
||
coff_swap_aux_out uses. */
|
||
if (i == 0
|
||
&& (isym.n_sclass == C_STAT
|
||
|| isym.n_sclass == C_HIDDEN)
|
||
&& isym.n_type == T_NULL
|
||
&& (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak))
|
||
{
|
||
asection *sec;
|
||
|
||
sec = h->root.u.def.section->output_section;
|
||
if (sec != NULL)
|
||
{
|
||
auxp->x_scn.x_scnlen = sec->size;
|
||
|
||
/* For PE, an overflow on the final link reportedly does
|
||
not matter. FIXME: Why not? */
|
||
if (sec->reloc_count > 0xffff
|
||
&& (! obj_pe (output_bfd)
|
||
|| finfo->info->relocatable))
|
||
(*_bfd_error_handler)
|
||
(_("%s: %s: reloc overflow: 0x%lx > 0xffff"),
|
||
bfd_get_filename (output_bfd),
|
||
bfd_get_section_name (output_bfd, sec),
|
||
sec->reloc_count);
|
||
|
||
if (sec->lineno_count > 0xffff
|
||
&& (! obj_pe (output_bfd)
|
||
|| finfo->info->relocatable))
|
||
(*_bfd_error_handler)
|
||
(_("%s: warning: %s: line number overflow: 0x%lx > 0xffff"),
|
||
bfd_get_filename (output_bfd),
|
||
bfd_get_section_name (output_bfd, sec),
|
||
sec->lineno_count);
|
||
|
||
auxp->x_scn.x_nreloc = sec->reloc_count;
|
||
auxp->x_scn.x_nlinno = sec->lineno_count;
|
||
auxp->x_scn.x_checksum = 0;
|
||
auxp->x_scn.x_associated = 0;
|
||
auxp->x_scn.x_comdat = 0;
|
||
}
|
||
}
|
||
|
||
bfd_coff_swap_aux_out (output_bfd, auxp, isym.n_type,
|
||
isym.n_sclass, (int) i, isym.n_numaux,
|
||
finfo->outsyms);
|
||
if (bfd_bwrite (finfo->outsyms, symesz, output_bfd) != symesz)
|
||
{
|
||
finfo->failed = TRUE;
|
||
return FALSE;
|
||
}
|
||
++obj_raw_syment_count (output_bfd);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Write out task global symbols, converting them to statics. Called
|
||
via coff_link_hash_traverse. Calls bfd_coff_write_global_sym to do
|
||
the dirty work, if the symbol we are processing needs conversion. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_write_task_globals (struct coff_link_hash_entry *h, void *data)
|
||
{
|
||
struct coff_final_link_info *finfo = (struct coff_final_link_info *) data;
|
||
bfd_boolean rtnval = TRUE;
|
||
bfd_boolean save_global_to_static;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct coff_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->indx < 0)
|
||
{
|
||
switch (h->root.type)
|
||
{
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
save_global_to_static = finfo->global_to_static;
|
||
finfo->global_to_static = TRUE;
|
||
rtnval = _bfd_coff_write_global_sym (h, data);
|
||
finfo->global_to_static = save_global_to_static;
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
return (rtnval);
|
||
}
|
||
|
||
/* Handle a link order which is supposed to generate a reloc. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_reloc_link_order (bfd *output_bfd,
|
||
struct coff_final_link_info *finfo,
|
||
asection *output_section,
|
||
struct bfd_link_order *link_order)
|
||
{
|
||
reloc_howto_type *howto;
|
||
struct internal_reloc *irel;
|
||
struct coff_link_hash_entry **rel_hash_ptr;
|
||
|
||
howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
|
||
if (howto == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
if (link_order->u.reloc.p->addend != 0)
|
||
{
|
||
bfd_size_type size;
|
||
bfd_byte *buf;
|
||
bfd_reloc_status_type rstat;
|
||
bfd_boolean ok;
|
||
file_ptr loc;
|
||
|
||
size = bfd_get_reloc_size (howto);
|
||
buf = bfd_zmalloc (size);
|
||
if (buf == NULL)
|
||
return FALSE;
|
||
|
||
rstat = _bfd_relocate_contents (howto, output_bfd,
|
||
(bfd_vma) link_order->u.reloc.p->addend,\
|
||
buf);
|
||
switch (rstat)
|
||
{
|
||
case bfd_reloc_ok:
|
||
break;
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
if (! ((*finfo->info->callbacks->reloc_overflow)
|
||
(finfo->info, NULL,
|
||
(link_order->type == bfd_section_reloc_link_order
|
||
? bfd_section_name (output_bfd,
|
||
link_order->u.reloc.p->u.section)
|
||
: link_order->u.reloc.p->u.name),
|
||
howto->name, link_order->u.reloc.p->addend,
|
||
(bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
|
||
{
|
||
free (buf);
|
||
return FALSE;
|
||
}
|
||
break;
|
||
}
|
||
loc = link_order->offset * bfd_octets_per_byte (output_bfd);
|
||
ok = bfd_set_section_contents (output_bfd, output_section, buf,
|
||
loc, size);
|
||
free (buf);
|
||
if (! ok)
|
||
return FALSE;
|
||
}
|
||
|
||
/* Store the reloc information in the right place. It will get
|
||
swapped and written out at the end of the final_link routine. */
|
||
irel = (finfo->section_info[output_section->target_index].relocs
|
||
+ output_section->reloc_count);
|
||
rel_hash_ptr = (finfo->section_info[output_section->target_index].rel_hashes
|
||
+ output_section->reloc_count);
|
||
|
||
memset (irel, 0, sizeof (struct internal_reloc));
|
||
*rel_hash_ptr = NULL;
|
||
|
||
irel->r_vaddr = output_section->vma + link_order->offset;
|
||
|
||
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 ();
|
||
*rel_hash_ptr = NULL;
|
||
irel->r_symndx = 0;
|
||
}
|
||
else
|
||
{
|
||
struct coff_link_hash_entry *h;
|
||
|
||
h = ((struct coff_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 (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;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
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;
|
||
}
|
||
}
|
||
|
||
/* FIXME: Is this always right? */
|
||
irel->r_type = howto->type;
|
||
|
||
/* r_size is only used on the RS/6000, which needs its own linker
|
||
routines anyhow. r_extern is only used for ECOFF. */
|
||
|
||
/* FIXME: What is the right value for r_offset? Is zero OK? */
|
||
++output_section->reloc_count;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* A basic reloc handling routine which may be used by processors with
|
||
simple relocs. */
|
||
|
||
bfd_boolean
|
||
_bfd_coff_generic_relocate_section (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
struct internal_reloc *relocs,
|
||
struct internal_syment *syms,
|
||
asection **sections)
|
||
{
|
||
struct internal_reloc *rel;
|
||
struct internal_reloc *relend;
|
||
|
||
rel = relocs;
|
||
relend = rel + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
long symndx;
|
||
struct coff_link_hash_entry *h;
|
||
struct internal_syment *sym;
|
||
bfd_vma addend;
|
||
bfd_vma val;
|
||
reloc_howto_type *howto;
|
||
bfd_reloc_status_type rstat;
|
||
|
||
symndx = rel->r_symndx;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
h = NULL;
|
||
sym = NULL;
|
||
}
|
||
else if (symndx < 0
|
||
|| (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
|
||
{
|
||
(*_bfd_error_handler)
|
||
("%B: illegal symbol index %ld in relocs", input_bfd, symndx);
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
h = obj_coff_sym_hashes (input_bfd)[symndx];
|
||
sym = syms + symndx;
|
||
}
|
||
|
||
/* COFF treats common symbols in one of two ways. Either the
|
||
size of the symbol is included in the section contents, or it
|
||
is not. We assume that the size is not included, and force
|
||
the rtype_to_howto function to adjust the addend as needed. */
|
||
if (sym != NULL && sym->n_scnum != 0)
|
||
addend = - sym->n_value;
|
||
else
|
||
addend = 0;
|
||
|
||
howto = bfd_coff_rtype_to_howto (input_bfd, input_section, rel, h,
|
||
sym, &addend);
|
||
if (howto == NULL)
|
||
return FALSE;
|
||
|
||
/* If we are doing a relocatable link, then we can just ignore
|
||
a PC relative reloc that is pcrel_offset. It will already
|
||
have the correct value. If this is not a relocatable link,
|
||
then we should ignore the symbol value. */
|
||
if (howto->pc_relative && howto->pcrel_offset)
|
||
{
|
||
if (info->relocatable)
|
||
continue;
|
||
if (sym != NULL && sym->n_scnum != 0)
|
||
addend += sym->n_value;
|
||
}
|
||
|
||
val = 0;
|
||
|
||
if (h == NULL)
|
||
{
|
||
asection *sec;
|
||
|
||
if (symndx == -1)
|
||
{
|
||
sec = bfd_abs_section_ptr;
|
||
val = 0;
|
||
}
|
||
else
|
||
{
|
||
sec = sections[symndx];
|
||
val = (sec->output_section->vma
|
||
+ sec->output_offset
|
||
+ sym->n_value);
|
||
if (! obj_pe (input_bfd))
|
||
val -= sec->vma;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| 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
|
||
+ sec->output_offset);
|
||
}
|
||
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
if (h->class == C_NT_WEAK && h->numaux == 1)
|
||
{
|
||
/* See _Microsoft Portable Executable and Common Object
|
||
File Format Specification_, section 5.5.3.
|
||
Note that weak symbols without aux records are a GNU
|
||
extension.
|
||
FIXME: All weak externals are treated as having
|
||
characteristic IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY (1).
|
||
These behave as per SVR4 ABI: A library member
|
||
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 =
|
||
input_bfd->tdata.coff_obj_data->sym_hashes[
|
||
h->aux->x_sym.x_tagndx.l];
|
||
|
||
if (!h2 || h2->root.type == bfd_link_hash_undefined)
|
||
{
|
||
sec = bfd_abs_section_ptr;
|
||
val = 0;
|
||
}
|
||
else
|
||
{
|
||
sec = h2->root.u.def.section;
|
||
val = h2->root.u.def.value
|
||
+ sec->output_section->vma + sec->output_offset;
|
||
}
|
||
}
|
||
else
|
||
/* This is a GNU extension. */
|
||
val = 0;
|
||
}
|
||
|
||
else if (! info->relocatable)
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
rel->r_vaddr - input_section->vma, TRUE)))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (info->base_file)
|
||
{
|
||
/* Emit a reloc if the backend thinks it needs it. */
|
||
if (sym && pe_data (output_bfd)->in_reloc_p (output_bfd, howto))
|
||
{
|
||
/* Relocation to a symbol in a section which isn't
|
||
absolute. We output the address here to a file.
|
||
This file is then read by dlltool when generating the
|
||
reloc section. Note that the base file is not
|
||
portable between systems. We write out a long here,
|
||
and dlltool reads in a long. */
|
||
long addr = (rel->r_vaddr
|
||
- input_section->vma
|
||
+ input_section->output_offset
|
||
+ input_section->output_section->vma);
|
||
if (coff_data (output_bfd)->pe)
|
||
addr -= pe_data(output_bfd)->pe_opthdr.ImageBase;
|
||
if (fwrite (&addr, 1, sizeof (long), (FILE *) info->base_file)
|
||
!= sizeof (long))
|
||
{
|
||
bfd_set_error (bfd_error_system_call);
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
|
||
rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents,
|
||
rel->r_vaddr - input_section->vma,
|
||
val, addend);
|
||
|
||
switch (rstat)
|
||
{
|
||
default:
|
||
abort ();
|
||
case bfd_reloc_ok:
|
||
break;
|
||
case bfd_reloc_outofrange:
|
||
(*_bfd_error_handler)
|
||
(_("%B: bad reloc address 0x%lx in section `%A'"),
|
||
input_bfd, input_section, (unsigned long) rel->r_vaddr);
|
||
return FALSE;
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
char buf[SYMNMLEN + 1];
|
||
|
||
if (symndx == -1)
|
||
name = "*ABS*";
|
||
else if (h != NULL)
|
||
name = NULL;
|
||
else
|
||
{
|
||
name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section,
|
||
rel->r_vaddr - input_section->vma)))
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
return TRUE;
|
||
}
|