mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-01-18 12:24:38 +08:00
67694446f7
While documented to not be reliable, it is still odd for objcopy to silently produce bad output when converting COFF/PE object files to ELF ones. The issue there is that relocation addends all are screwed up by subtracting the symbol's section offset. In the COFF/PE world, to my knowledge, section contents stores the addends alone, not the result of symbol value plus addend. Hence the compensation talked about in a comment ahead of the sole use site of CALC_ADDEND() may need to account for the VMA (which is always zero for object files anyway), but not for the symbol value. The coff-sh.c adjustment is based upon guessing that behavior there is the same. Note also how coff-aarch64.c short-circuits CALC_ADDEND() altogether, which may suggest that a much simpler macro might do for the COFF_WITH_PE case in the three arch-specific files touched here. For (at least) Arm/WinCE this actually results in more appropriate objdump output as well, as can be seen in the one testcase which has its expectations adjusted (the generated binary doesn't change).
866 lines
24 KiB
C
866 lines
24 KiB
C
/* BFD back-end for Intel 386 COFF files.
|
|
Copyright (C) 1990-2023 Free Software Foundation, Inc.
|
|
Written by 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
|
|
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. */
|
|
|
|
#include "sysdep.h"
|
|
#include "bfd.h"
|
|
#include "libbfd.h"
|
|
|
|
#include "coff/i386.h"
|
|
|
|
#include "coff/internal.h"
|
|
|
|
#ifdef COFF_WITH_PE
|
|
#include "coff/pe.h"
|
|
#endif
|
|
|
|
#ifndef bfd_pe_print_pdata
|
|
#define bfd_pe_print_pdata NULL
|
|
#endif
|
|
|
|
#include "libcoff.h"
|
|
|
|
/* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
|
|
#define OCTETS_PER_BYTE(ABFD, SEC) 1
|
|
|
|
static reloc_howto_type *coff_i386_rtype_to_howto
|
|
(bfd *, asection *, struct internal_reloc *,
|
|
struct coff_link_hash_entry *, struct internal_syment *,
|
|
bfd_vma *);
|
|
static reloc_howto_type *coff_i386_reloc_type_lookup
|
|
(bfd *, bfd_reloc_code_real_type);
|
|
|
|
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
|
|
/* The page size is a guess based on ELF. */
|
|
|
|
#define COFF_PAGE_SIZE 0x1000
|
|
|
|
/* For some reason when using i386 COFF the value stored in the .text
|
|
section for a reference to a common symbol is the value itself plus
|
|
any desired offset. Ian Taylor, Cygnus Support. */
|
|
|
|
/* If we are producing relocatable output, we need to do some
|
|
adjustments to the object file that are not done by the
|
|
bfd_perform_relocation function. This function is called by every
|
|
reloc type to make any required adjustments. */
|
|
|
|
static bfd_reloc_status_type
|
|
coff_i386_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
symvalue diff;
|
|
|
|
#ifndef COFF_WITH_PE
|
|
if (output_bfd == (bfd *) NULL)
|
|
return bfd_reloc_continue;
|
|
#endif
|
|
|
|
if (bfd_is_com_section (symbol->section))
|
|
{
|
|
#ifndef COFF_WITH_PE
|
|
/* We are relocating a common symbol. The current value in the
|
|
object file is ORIG + OFFSET, where ORIG is the value of the
|
|
common symbol as seen by the object file when it was compiled
|
|
(this may be zero if the symbol was undefined) and OFFSET is
|
|
the offset into the common symbol (normally zero, but may be
|
|
non-zero when referring to a field in a common structure).
|
|
ORIG is the negative of reloc_entry->addend, which is set by
|
|
the CALC_ADDEND macro below. We want to replace the value in
|
|
the object file with NEW + OFFSET, where NEW is the value of
|
|
the common symbol which we are going to put in the final
|
|
object file. NEW is symbol->value. */
|
|
diff = symbol->value + reloc_entry->addend;
|
|
#else
|
|
/* In PE mode, we do not offset the common symbol. */
|
|
diff = reloc_entry->addend;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/* For some reason bfd_perform_relocation always effectively
|
|
ignores the addend for a COFF target when producing
|
|
relocatable output. This seems to be always wrong for 386
|
|
COFF, so we handle the addend here instead. */
|
|
#ifdef COFF_WITH_PE
|
|
if (output_bfd == (bfd *) NULL)
|
|
{
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
|
|
|
/* Although PC relative relocations are very similar between
|
|
PE and non-PE formats, but they are off by howto->size
|
|
bytes. For the external relocation, PE is very different
|
|
from others. See md_apply_fix3 () in gas/config/tc-i386.c.
|
|
When we link PE and non-PE object files together to
|
|
generate a non-PE executable, we have to compensate it
|
|
here. */
|
|
if (howto->pc_relative && howto->pcrel_offset)
|
|
diff = -bfd_get_reloc_size (howto);
|
|
else if (symbol->flags & BSF_WEAK)
|
|
diff = reloc_entry->addend - symbol->value;
|
|
else
|
|
diff = -reloc_entry->addend;
|
|
}
|
|
else
|
|
#endif
|
|
diff = reloc_entry->addend;
|
|
}
|
|
|
|
#ifdef COFF_WITH_PE
|
|
/* FIXME: How should this case be handled? */
|
|
if (reloc_entry->howto->type == R_IMAGEBASE
|
|
&& output_bfd != NULL
|
|
&& bfd_get_flavour(output_bfd) == bfd_target_coff_flavour)
|
|
diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
|
|
#endif
|
|
|
|
#define DOIT(x) \
|
|
x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
|
|
|
|
if (diff != 0)
|
|
{
|
|
reloc_howto_type *howto = reloc_entry->howto;
|
|
bfd_size_type octets = (reloc_entry->address
|
|
* OCTETS_PER_BYTE (abfd, input_section));
|
|
unsigned char *addr = (unsigned char *) data + octets;
|
|
|
|
if (!bfd_reloc_offset_in_range (howto, abfd, input_section, octets))
|
|
return bfd_reloc_outofrange;
|
|
|
|
switch (bfd_get_reloc_size (howto))
|
|
{
|
|
case 1:
|
|
{
|
|
char x = bfd_get_8 (abfd, addr);
|
|
DOIT (x);
|
|
bfd_put_8 (abfd, x, addr);
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
{
|
|
short x = bfd_get_16 (abfd, addr);
|
|
DOIT (x);
|
|
bfd_put_16 (abfd, (bfd_vma) x, addr);
|
|
}
|
|
break;
|
|
|
|
case 4:
|
|
{
|
|
long x = bfd_get_32 (abfd, addr);
|
|
DOIT (x);
|
|
bfd_put_32 (abfd, (bfd_vma) x, addr);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* Now let bfd_perform_relocation finish everything up. */
|
|
return bfd_reloc_continue;
|
|
}
|
|
|
|
#ifdef COFF_WITH_PE
|
|
/* Return TRUE if this relocation should appear in the output .reloc
|
|
section. */
|
|
|
|
static bool
|
|
in_reloc_p (bfd *abfd ATTRIBUTE_UNUSED, reloc_howto_type *howto)
|
|
{
|
|
return ! howto->pc_relative
|
|
&& howto->type != R_IMAGEBASE
|
|
&& howto->type != R_SECREL32
|
|
&& howto->type != R_SECTION;
|
|
}
|
|
#endif /* COFF_WITH_PE */
|
|
|
|
#ifndef PCRELOFFSET
|
|
#define PCRELOFFSET false
|
|
#endif
|
|
|
|
static reloc_howto_type howto_table[] =
|
|
{
|
|
EMPTY_HOWTO (0),
|
|
EMPTY_HOWTO (1),
|
|
EMPTY_HOWTO (2),
|
|
EMPTY_HOWTO (3),
|
|
EMPTY_HOWTO (4),
|
|
EMPTY_HOWTO (5),
|
|
HOWTO (R_DIR32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"dir32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
/* PE IMAGE_REL_I386_DIR32NB relocation (7). */
|
|
HOWTO (R_IMAGEBASE, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"rva32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
EMPTY_HOWTO (010),
|
|
EMPTY_HOWTO (011),
|
|
#ifdef COFF_WITH_PE
|
|
/* 16-bit word section relocation (012). */
|
|
HOWTO (R_SECTION, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"secidx", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
/* 32-bit longword section relative relocation (013). */
|
|
HOWTO (R_SECREL32, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"secrel32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
true), /* pcrel_offset */
|
|
#else
|
|
EMPTY_HOWTO (012),
|
|
EMPTY_HOWTO (013),
|
|
#endif
|
|
EMPTY_HOWTO (014),
|
|
EMPTY_HOWTO (015),
|
|
EMPTY_HOWTO (016),
|
|
/* Byte relocation (017). */
|
|
HOWTO (R_RELBYTE, /* type */
|
|
0, /* rightshift */
|
|
1, /* size */
|
|
8, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"8", /* name */
|
|
true, /* partial_inplace */
|
|
0x000000ff, /* src_mask */
|
|
0x000000ff, /* dst_mask */
|
|
PCRELOFFSET), /* pcrel_offset */
|
|
/* 16-bit word relocation (020). */
|
|
HOWTO (R_RELWORD, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"16", /* name */
|
|
true, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
PCRELOFFSET), /* pcrel_offset */
|
|
/* 32-bit longword relocation (021). */
|
|
HOWTO (R_RELLONG, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
PCRELOFFSET), /* pcrel_offset */
|
|
/* Byte PC relative relocation (022). */
|
|
HOWTO (R_PCRBYTE, /* type */
|
|
0, /* rightshift */
|
|
1, /* size */
|
|
8, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"DISP8", /* name */
|
|
true, /* partial_inplace */
|
|
0x000000ff, /* src_mask */
|
|
0x000000ff, /* dst_mask */
|
|
PCRELOFFSET), /* pcrel_offset */
|
|
/* 16-bit word PC relative relocation (023). */
|
|
HOWTO (R_PCRWORD, /* type */
|
|
0, /* rightshift */
|
|
2, /* size */
|
|
16, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"DISP16", /* name */
|
|
true, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
PCRELOFFSET), /* pcrel_offset */
|
|
/* 32-bit longword PC relative relocation (024). */
|
|
HOWTO (R_PCRLONG, /* type */
|
|
0, /* rightshift */
|
|
4, /* size */
|
|
32, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
coff_i386_reloc, /* special_function */
|
|
"DISP32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
PCRELOFFSET) /* pcrel_offset */
|
|
};
|
|
|
|
#define NUM_HOWTOS (sizeof (howto_table) / sizeof (howto_table[0]))
|
|
|
|
/* Turn a howto into a reloc nunmber */
|
|
|
|
#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
|
|
#define BADMAG(x) I386BADMAG(x)
|
|
#define I386 1 /* Customize coffcode.h */
|
|
|
|
#define RTYPE2HOWTO(cache_ptr, dst) \
|
|
((cache_ptr)->howto = \
|
|
((dst)->r_type < NUM_HOWTOS \
|
|
? howto_table + (dst)->r_type \
|
|
: NULL))
|
|
|
|
/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
|
|
library. On some other COFF targets STYP_BSS is normally
|
|
STYP_NOLOAD. */
|
|
#define BSS_NOLOAD_IS_SHARED_LIBRARY
|
|
|
|
/* Compute the addend of a reloc. If the reloc is to a common symbol,
|
|
the object file contains the value of the common symbol. By the
|
|
time this is called, the linker may be using a different symbol
|
|
from a different object file with a different value. Therefore, we
|
|
hack wildly to locate the original symbol from this file so that we
|
|
can make the correct adjustment. This macro sets coffsym to the
|
|
symbol from the original file, and uses it to set the addend value
|
|
correctly. If this is not a common symbol, the usual addend
|
|
calculation is done, except that an additional tweak is needed for
|
|
PC relative relocs.
|
|
FIXME: This macro refers to symbols and asect; these are from the
|
|
calling function, not the macro arguments. */
|
|
|
|
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
|
|
{ \
|
|
coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
|
|
if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
|
|
coffsym = (obj_symbols (abfd) \
|
|
+ (cache_ptr->sym_ptr_ptr - symbols)); \
|
|
else if (ptr) \
|
|
coffsym = coff_symbol_from (ptr); \
|
|
if (coffsym != (coff_symbol_type *) NULL \
|
|
&& coffsym->native->u.syment.n_scnum == 0) \
|
|
cache_ptr->addend = - coffsym->native->u.syment.n_value; \
|
|
else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
|
|
&& ptr->section != (asection *) NULL) \
|
|
cache_ptr->addend = - (ptr->section->vma \
|
|
+ COFF_PE_ADDEND_BIAS (ptr)); \
|
|
else \
|
|
cache_ptr->addend = 0; \
|
|
if (ptr && reloc.r_type < NUM_HOWTOS \
|
|
&& howto_table[reloc.r_type].pc_relative) \
|
|
cache_ptr->addend += asect->vma; \
|
|
}
|
|
|
|
/* We use the special COFF backend linker. For normal i386 COFF, we
|
|
can use the generic relocate_section routine. For PE, we need our
|
|
own routine. */
|
|
|
|
#ifndef COFF_WITH_PE
|
|
|
|
#define coff_relocate_section _bfd_coff_generic_relocate_section
|
|
|
|
#else /* COFF_WITH_PE */
|
|
|
|
/* The PE relocate section routine. We handle secidx relocations here,
|
|
as well as making sure that we don't do anything for a relocatable
|
|
link. */
|
|
|
|
static bool
|
|
coff_pe_i386_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;
|
|
|
|
if (bfd_link_relocatable (info))
|
|
return true;
|
|
|
|
rel = relocs;
|
|
relend = rel + input_section->reloc_count;
|
|
|
|
for (; rel < relend; rel++)
|
|
{
|
|
long symndx;
|
|
struct coff_link_hash_entry *h;
|
|
asection *sec, *s;
|
|
uint16_t idx = 0, i = 1;
|
|
|
|
if (rel->r_type != R_SECTION)
|
|
continue;
|
|
|
|
/* Make sure that _bfd_coff_generic_relocate_section won't parse
|
|
this reloc after us. */
|
|
rel->r_type = 0;
|
|
|
|
symndx = rel->r_symndx;
|
|
|
|
if (symndx < 0
|
|
|| (unsigned long) symndx >= obj_raw_syment_count (input_bfd))
|
|
continue;
|
|
|
|
h = obj_coff_sym_hashes (input_bfd)[symndx];
|
|
|
|
if (h == NULL)
|
|
sec = sections[symndx];
|
|
else
|
|
{
|
|
if (h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak)
|
|
{
|
|
/* Defined weak symbols are a GNU extension. */
|
|
sec = h->root.u.def.section;
|
|
}
|
|
else
|
|
{
|
|
sec = NULL;
|
|
}
|
|
}
|
|
|
|
if (!sec)
|
|
continue;
|
|
|
|
if (bfd_is_abs_section (sec))
|
|
continue;
|
|
|
|
if (discarded_section (sec))
|
|
continue;
|
|
|
|
s = output_bfd->sections;
|
|
while (s)
|
|
{
|
|
if (s == sec->output_section)
|
|
{
|
|
idx = i;
|
|
break;
|
|
}
|
|
|
|
i++;
|
|
s = s->next;
|
|
}
|
|
|
|
bfd_putl16 (idx, contents + rel->r_vaddr - input_section->vma);
|
|
}
|
|
|
|
return _bfd_coff_generic_relocate_section (output_bfd, info, input_bfd,
|
|
input_section, contents,
|
|
relocs, syms, sections);
|
|
}
|
|
|
|
#define coff_relocate_section coff_pe_i386_relocate_section
|
|
|
|
#endif /* COFF_WITH_PE */
|
|
|
|
/* Convert an rtype to howto for the COFF backend linker. */
|
|
|
|
static reloc_howto_type *
|
|
coff_i386_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asection *sec,
|
|
struct internal_reloc *rel,
|
|
struct coff_link_hash_entry *h,
|
|
struct internal_syment *sym,
|
|
bfd_vma *addendp)
|
|
{
|
|
reloc_howto_type *howto;
|
|
|
|
if (rel->r_type >= NUM_HOWTOS)
|
|
{
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
howto = howto_table + rel->r_type;
|
|
|
|
#ifdef COFF_WITH_PE
|
|
/* Cancel out code in _bfd_coff_generic_relocate_section. */
|
|
*addendp = 0;
|
|
#endif
|
|
|
|
if (howto->pc_relative)
|
|
*addendp += sec->vma;
|
|
|
|
if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
|
|
{
|
|
/* This is a common symbol. The section contents include the
|
|
size (sym->n_value) as an addend. The relocate_section
|
|
function will be adding in the final value of the symbol. We
|
|
need to subtract out the current size in order to get the
|
|
correct result. */
|
|
|
|
BFD_ASSERT (h != NULL);
|
|
|
|
#ifndef COFF_WITH_PE
|
|
/* I think we *do* want to bypass this. If we don't, I have
|
|
seen some data parameters get the wrong relocation address.
|
|
If I link two versions with and without this section bypassed
|
|
and then do a binary comparison, the addresses which are
|
|
different can be looked up in the map. The case in which
|
|
this section has been bypassed has addresses which correspond
|
|
to values I can find in the map. */
|
|
*addendp -= sym->n_value;
|
|
#endif
|
|
}
|
|
|
|
#ifndef COFF_WITH_PE
|
|
/* If the output symbol is common (in which case this must be a
|
|
relocatable link), we need to add in the final size of the
|
|
common symbol. */
|
|
if (h != NULL && h->root.type == bfd_link_hash_common)
|
|
*addendp += h->root.u.c.size;
|
|
#endif
|
|
|
|
#ifdef COFF_WITH_PE
|
|
if (howto->pc_relative)
|
|
{
|
|
*addendp -= 4;
|
|
|
|
/* If the symbol is defined, then the generic code is going to
|
|
add back the symbol value in order to cancel out an
|
|
adjustment it made to the addend. However, we set the addend
|
|
to 0 at the start of this function. We need to adjust here,
|
|
to avoid the adjustment the generic code will make. FIXME:
|
|
This is getting a bit hackish. */
|
|
if (sym != NULL && sym->n_scnum != 0)
|
|
*addendp -= sym->n_value;
|
|
}
|
|
|
|
if (rel->r_type == R_IMAGEBASE
|
|
&& (bfd_get_flavour(sec->output_section->owner)
|
|
== bfd_target_coff_flavour))
|
|
{
|
|
*addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
|
|
}
|
|
|
|
/* PR 17099 - Absolute R_PCRLONG relocations do not need a symbol. */
|
|
if (rel->r_type == R_PCRLONG && sym == NULL)
|
|
*addendp -= rel->r_vaddr;
|
|
else
|
|
BFD_ASSERT (sym != NULL);
|
|
|
|
if (rel->r_type == R_SECREL32 && sym != NULL)
|
|
{
|
|
bfd_vma osect_vma;
|
|
|
|
if (h && (h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak))
|
|
osect_vma = h->root.u.def.section->output_section->vma;
|
|
else
|
|
{
|
|
asection *s;
|
|
int i;
|
|
|
|
/* Sigh, the only way to get the section to offset against
|
|
is to find it the hard way. */
|
|
|
|
for (s = abfd->sections, i = 1; i < sym->n_scnum; i++)
|
|
s = s->next;
|
|
|
|
osect_vma = s->output_section->vma;
|
|
}
|
|
|
|
*addendp -= osect_vma;
|
|
}
|
|
#endif
|
|
|
|
return howto;
|
|
}
|
|
|
|
#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup
|
|
#define coff_bfd_reloc_name_lookup coff_i386_reloc_name_lookup
|
|
|
|
static reloc_howto_type *
|
|
coff_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
switch (code)
|
|
{
|
|
case BFD_RELOC_RVA:
|
|
return howto_table + R_IMAGEBASE;
|
|
case BFD_RELOC_32:
|
|
return howto_table + R_DIR32;
|
|
case BFD_RELOC_32_PCREL:
|
|
return howto_table + R_PCRLONG;
|
|
case BFD_RELOC_16:
|
|
return howto_table + R_RELWORD;
|
|
case BFD_RELOC_16_PCREL:
|
|
return howto_table + R_PCRWORD;
|
|
case BFD_RELOC_8:
|
|
return howto_table + R_RELBYTE;
|
|
case BFD_RELOC_8_PCREL:
|
|
return howto_table + R_PCRBYTE;
|
|
#ifdef COFF_WITH_PE
|
|
case BFD_RELOC_32_SECREL:
|
|
return howto_table + R_SECREL32;
|
|
case BFD_RELOC_16_SECIDX:
|
|
return howto_table + R_SECTION;
|
|
#endif
|
|
default:
|
|
BFD_FAIL ();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
coff_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < NUM_HOWTOS; i++)
|
|
if (howto_table[i].name != NULL
|
|
&& strcasecmp (howto_table[i].name, r_name) == 0)
|
|
return &howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#define coff_rtype_to_howto coff_i386_rtype_to_howto
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
|
|
/* If i386 gcc uses underscores for symbol names, then it does not use
|
|
a leading dot for local labels, so if TARGET_UNDERSCORE is defined
|
|
we treat all symbols starting with L as local. */
|
|
|
|
static bool
|
|
coff_i386_is_local_label_name (bfd *abfd, const char *name)
|
|
{
|
|
if (name[0] == 'L')
|
|
return true;
|
|
|
|
return _bfd_coff_is_local_label_name (abfd, name);
|
|
}
|
|
|
|
#define coff_bfd_is_local_label_name coff_i386_is_local_label_name
|
|
|
|
#endif /* TARGET_UNDERSCORE */
|
|
|
|
#include "coffcode.h"
|
|
|
|
const bfd_target
|
|
#ifdef TARGET_SYM
|
|
TARGET_SYM =
|
|
#else
|
|
i386_coff_vec =
|
|
#endif
|
|
{
|
|
#ifdef TARGET_NAME
|
|
TARGET_NAME,
|
|
#else
|
|
"coff-i386", /* name */
|
|
#endif
|
|
bfd_target_coff_flavour,
|
|
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
|
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS ),
|
|
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
|
|
#ifdef COFF_WITH_PE
|
|
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
|
|
#endif
|
|
| SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
TARGET_UNDERSCORE, /* leading underscore */
|
|
#else
|
|
0, /* leading underscore */
|
|
#endif
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
0, /* match priority. */
|
|
TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
|
|
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
|
|
|
#ifndef COFF_CHECK_FORMAT
|
|
#define COFF_CHECK_FORMAT coff_object_p
|
|
#endif
|
|
#ifndef COFF_WRITE_CONTENTS
|
|
#define COFF_WRITE_CONTENTS coff_write_object_contents
|
|
#endif
|
|
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
|
|
|
{ /* bfd_check_format */
|
|
_bfd_dummy_target,
|
|
COFF_CHECK_FORMAT,
|
|
bfd_generic_archive_p,
|
|
COFF_CHECK_FORMAT
|
|
},
|
|
{ /* bfd_set_format */
|
|
_bfd_bool_bfd_false_error,
|
|
coff_mkobject,
|
|
_bfd_generic_mkarchive,
|
|
_bfd_bool_bfd_false_error
|
|
},
|
|
{ /* bfd_write_contents */
|
|
_bfd_bool_bfd_false_error,
|
|
COFF_WRITE_CONTENTS,
|
|
_bfd_write_archive_contents,
|
|
_bfd_bool_bfd_false_error
|
|
},
|
|
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
|
BFD_JUMP_TABLE_COPY (coff),
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
|
BFD_JUMP_TABLE_LINK (coff),
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
|
|
|
NULL,
|
|
|
|
COFF_SWAP_TABLE
|
|
};
|
|
|
|
#ifdef COFF_WITH_PE_BIGOBJ
|
|
const bfd_target
|
|
TARGET_SYM_BIG =
|
|
{
|
|
TARGET_NAME_BIG,
|
|
bfd_target_coff_flavour,
|
|
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
|
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
|
|
|
(HAS_RELOC | EXEC_P | /* object flags */
|
|
HAS_LINENO | HAS_DEBUG |
|
|
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS ),
|
|
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
|
|
#ifdef COFF_WITH_PE
|
|
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY | SEC_DEBUGGING
|
|
#endif
|
|
| SEC_CODE | SEC_DATA | SEC_EXCLUDE ),
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
TARGET_UNDERSCORE, /* leading underscore */
|
|
#else
|
|
0, /* leading underscore */
|
|
#endif
|
|
'/', /* ar_pad_char */
|
|
15, /* ar_max_namelen */
|
|
0, /* match priority. */
|
|
TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
|
|
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
|
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
|
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
|
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
|
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
|
|
|
{ /* bfd_check_format */
|
|
_bfd_dummy_target,
|
|
COFF_CHECK_FORMAT,
|
|
bfd_generic_archive_p,
|
|
COFF_CHECK_FORMAT
|
|
},
|
|
{ /* bfd_set_format */
|
|
_bfd_bool_bfd_false_error,
|
|
coff_mkobject,
|
|
_bfd_generic_mkarchive,
|
|
_bfd_bool_bfd_false_error
|
|
},
|
|
{ /* bfd_write_contents */
|
|
_bfd_bool_bfd_false_error,
|
|
COFF_WRITE_CONTENTS,
|
|
_bfd_write_archive_contents,
|
|
_bfd_bool_bfd_false_error
|
|
},
|
|
|
|
BFD_JUMP_TABLE_GENERIC (coff),
|
|
BFD_JUMP_TABLE_COPY (coff),
|
|
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
|
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
|
|
BFD_JUMP_TABLE_SYMBOLS (coff),
|
|
BFD_JUMP_TABLE_RELOCS (coff),
|
|
BFD_JUMP_TABLE_WRITE (coff),
|
|
BFD_JUMP_TABLE_LINK (coff),
|
|
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
|
|
|
NULL,
|
|
|
|
&bigobj_swap_table
|
|
};
|
|
#endif
|