1999-05-03 09:29:11 +02:00
|
|
|
/* BFD back-end for Intel 386 COFF files.
|
2001-03-08 22:04:02 +01:00
|
|
|
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
|
2002-06-25 08:21:54 +02:00
|
|
|
2000, 2001, 2002
|
1999-05-03 09:29:11 +02:00
|
|
|
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
|
|
|
|
#include "bfd.h"
|
|
|
|
#include "sysdep.h"
|
|
|
|
#include "libbfd.h"
|
|
|
|
|
|
|
|
#include "coff/i386.h"
|
|
|
|
|
|
|
|
#include "coff/internal.h"
|
|
|
|
|
|
|
|
#ifdef COFF_WITH_PE
|
|
|
|
#include "coff/pe.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef COFF_GO32_EXE
|
|
|
|
#include "coff/go32exe.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include "libcoff.h"
|
|
|
|
|
1999-09-18 02:44:47 +02:00
|
|
|
static bfd_reloc_status_type coff_i386_reloc
|
1999-05-03 09:29:11 +02:00
|
|
|
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
|
|
|
|
static reloc_howto_type *coff_i386_rtype_to_howto
|
|
|
|
PARAMS ((bfd *, asection *, struct internal_reloc *,
|
|
|
|
struct coff_link_hash_entry *, struct internal_syment *,
|
|
|
|
bfd_vma *));
|
1999-08-18 08:00:13 +02:00
|
|
|
static reloc_howto_type *coff_i386_reloc_type_lookup
|
|
|
|
PARAMS ((bfd *, bfd_reloc_code_real_type));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
#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 relocateable 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 (abfd, reloc_entry, symbol, data, input_section, output_bfd,
|
|
|
|
error_message)
|
|
|
|
bfd *abfd;
|
|
|
|
arelent *reloc_entry;
|
|
|
|
asymbol *symbol;
|
|
|
|
PTR data;
|
1999-07-12 12:30:21 +02:00
|
|
|
asection *input_section ATTRIBUTE_UNUSED;
|
1999-05-03 09:29:11 +02:00
|
|
|
bfd *output_bfd;
|
1999-07-12 12:30:21 +02:00
|
|
|
char **error_message ATTRIBUTE_UNUSED;
|
1999-05-03 09:29:11 +02:00
|
|
|
{
|
|
|
|
symvalue diff;
|
|
|
|
|
2000-06-19 01:48:21 +02:00
|
|
|
#ifndef COFF_WITH_PE
|
1999-05-03 09:29:11 +02:00
|
|
|
if (output_bfd == (bfd *) NULL)
|
|
|
|
return bfd_reloc_continue;
|
2000-06-19 01:48:21 +02:00
|
|
|
#endif
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
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
|
|
|
|
relocateable output. This seems to be always wrong for 386
|
|
|
|
COFF, so we handle the addend here instead. */
|
2000-06-19 01:48:21 +02:00
|
|
|
#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 1 << 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. */
|
2002-06-25 08:21:54 +02:00
|
|
|
if (howto->pc_relative && howto->pcrel_offset)
|
2000-06-19 01:48:21 +02:00
|
|
|
diff = -(1 << howto->size);
|
|
|
|
else
|
|
|
|
diff = -reloc_entry->addend;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
#endif
|
|
|
|
diff = reloc_entry->addend;
|
1999-05-03 09:29:11 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef COFF_WITH_PE
|
|
|
|
/* FIXME: How should this case be handled? */
|
2001-05-08 19:44:00 +02:00
|
|
|
if (reloc_entry->howto->type == R_IMAGEBASE
|
|
|
|
&& output_bfd != NULL
|
|
|
|
&& bfd_get_flavour(output_bfd) == bfd_target_coff_flavour)
|
1999-08-18 08:00:13 +02:00
|
|
|
diff -= pe_data (output_bfd)->pe_opthdr.ImageBase;
|
1999-05-03 09:29:11 +02:00
|
|
|
#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;
|
|
|
|
unsigned char *addr = (unsigned char *) data + reloc_entry->address;
|
|
|
|
|
|
|
|
switch (howto->size)
|
|
|
|
{
|
|
|
|
case 0:
|
|
|
|
{
|
|
|
|
char x = bfd_get_8 (abfd, addr);
|
|
|
|
DOIT (x);
|
|
|
|
bfd_put_8 (abfd, x, addr);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 1:
|
|
|
|
{
|
|
|
|
short x = bfd_get_16 (abfd, addr);
|
|
|
|
DOIT (x);
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
bfd_put_16 (abfd, (bfd_vma) x, addr);
|
1999-05-03 09:29:11 +02:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 2:
|
|
|
|
{
|
|
|
|
long x = bfd_get_32 (abfd, addr);
|
|
|
|
DOIT (x);
|
Touches most files in bfd/, so likely will be blamed for everything..
o bfd_read and bfd_write lose an unnecessary param and become
bfd_bread and bfd_bwrite.
o bfd_*alloc now all take a bfd_size_type arg, and will error if
size_t is too small. eg. 32 bit host, 64 bit bfd, verrry big files
or bugs in linker scripts etc.
o file_ptr becomes a bfd_signed_vma. Besides matching sizes with
various other types involved in handling sections, this should make
it easier for bfd to support a 64 bit off_t on 32 bit hosts that
provide it.
o I've made the H_GET_* and H_PUT_* macros (which invoke bfd_h_{get,put}_*)
generally available. They now cast their args to bfd_vma and
bfd_byte * as appropriate, which removes a swag of casts from the
source.
o Bug fixes to bfd_get8, aix386_core_vec, elf32_h8_relax_section, and
aout-encap.c.
o Zillions of formatting and -Wconversion fixes.
2001-09-18 11:57:26 +02:00
|
|
|
bfd_put_32 (abfd, (bfd_vma) x, addr);
|
1999-05-03 09:29:11 +02:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
abort ();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now let bfd_perform_relocation finish everything up. */
|
|
|
|
return bfd_reloc_continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef COFF_WITH_PE
|
2002-11-30 09:39:46 +01:00
|
|
|
/* Return TRUE if this relocation should appear in the output .reloc
|
1999-09-07 04:59:17 +02:00
|
|
|
section. */
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean in_reloc_p PARAMS ((bfd *, reloc_howto_type *));
|
1999-09-07 04:59:17 +02:00
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean in_reloc_p (abfd, howto)
|
2000-06-19 03:22:44 +02:00
|
|
|
bfd * abfd ATTRIBUTE_UNUSED;
|
1999-05-03 09:29:11 +02:00
|
|
|
reloc_howto_type *howto;
|
|
|
|
{
|
|
|
|
return ! howto->pc_relative && howto->type != R_IMAGEBASE;
|
1999-09-18 02:44:47 +02:00
|
|
|
}
|
1999-09-07 04:59:17 +02:00
|
|
|
#endif /* COFF_WITH_PE */
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
#ifndef PCRELOFFSET
|
2002-11-30 09:39:46 +01:00
|
|
|
#define PCRELOFFSET FALSE
|
1999-05-03 09:29:11 +02:00
|
|
|
#endif
|
|
|
|
|
1999-09-18 02:44:47 +02:00
|
|
|
static reloc_howto_type howto_table[] =
|
1999-05-03 09:29:11 +02:00
|
|
|
{
|
1999-07-12 12:30:21 +02:00
|
|
|
EMPTY_HOWTO (0),
|
|
|
|
EMPTY_HOWTO (1),
|
|
|
|
EMPTY_HOWTO (2),
|
|
|
|
EMPTY_HOWTO (3),
|
|
|
|
EMPTY_HOWTO (4),
|
|
|
|
EMPTY_HOWTO (5),
|
1999-09-18 02:44:47 +02:00
|
|
|
HOWTO (R_DIR32, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
32, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"dir32", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0xffffffff, /* src_mask */
|
|
|
|
0xffffffff, /* dst_mask */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE), /* pcrel_offset */
|
1999-09-18 02:44:47 +02:00
|
|
|
/* PE IMAGE_REL_I386_DIR32NB relocation (7). */
|
|
|
|
HOWTO (R_IMAGEBASE, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
32, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"rva32", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0xffffffff, /* src_mask */
|
|
|
|
0xffffffff, /* dst_mask */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE), /* pcrel_offset */
|
1999-07-12 12:30:21 +02:00
|
|
|
EMPTY_HOWTO (010),
|
|
|
|
EMPTY_HOWTO (011),
|
|
|
|
EMPTY_HOWTO (012),
|
|
|
|
EMPTY_HOWTO (013),
|
|
|
|
EMPTY_HOWTO (014),
|
|
|
|
EMPTY_HOWTO (015),
|
|
|
|
EMPTY_HOWTO (016),
|
1999-08-18 08:00:13 +02:00
|
|
|
/* Byte relocation (017). */
|
|
|
|
HOWTO (R_RELBYTE, /* type */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* rightshift */
|
|
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
8, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"8", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0x000000ff, /* src_mask */
|
|
|
|
0x000000ff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET), /* pcrel_offset */
|
1999-08-18 08:00:13 +02:00
|
|
|
/* 16-bit word relocation (020). */
|
1999-09-18 02:44:47 +02:00
|
|
|
HOWTO (R_RELWORD, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
16, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"16", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0x0000ffff, /* src_mask */
|
|
|
|
0x0000ffff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET), /* pcrel_offset */
|
1999-09-18 02:44:47 +02:00
|
|
|
/* 32-bit longword relocation (021). */
|
|
|
|
HOWTO (R_RELLONG, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
32, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
FALSE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"32", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0xffffffff, /* src_mask */
|
|
|
|
0xffffffff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET), /* pcrel_offset */
|
1999-09-18 02:44:47 +02:00
|
|
|
/* Byte PC relative relocation (022). */
|
|
|
|
HOWTO (R_PCRBYTE, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
0, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
8, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"DISP8", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0x000000ff, /* src_mask */
|
|
|
|
0x000000ff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET), /* pcrel_offset */
|
1999-09-18 02:44:47 +02:00
|
|
|
/* 16-bit word PC relative relocation (023). */
|
|
|
|
HOWTO (R_PCRWORD, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
16, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"DISP16", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0x0000ffff, /* src_mask */
|
|
|
|
0x0000ffff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET), /* pcrel_offset */
|
1999-08-18 08:00:13 +02:00
|
|
|
/* 32-bit longword PC relative relocation (024). */
|
1999-09-18 02:44:47 +02:00
|
|
|
HOWTO (R_PCRLONG, /* type */
|
|
|
|
0, /* rightshift */
|
|
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
|
|
32, /* bitsize */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* pc_relative */
|
1999-09-18 02:44:47 +02:00
|
|
|
0, /* bitpos */
|
1999-05-03 09:29:11 +02:00
|
|
|
complain_overflow_signed, /* complain_on_overflow */
|
1999-09-18 02:44:47 +02:00
|
|
|
coff_i386_reloc, /* special_function */
|
|
|
|
"DISP32", /* name */
|
2002-11-30 09:39:46 +01:00
|
|
|
TRUE, /* partial_inplace */
|
1999-09-18 02:44:47 +02:00
|
|
|
0xffffffff, /* src_mask */
|
|
|
|
0xffffffff, /* dst_mask */
|
1999-05-03 09:29:11 +02:00
|
|
|
PCRELOFFSET) /* pcrel_offset */
|
|
|
|
};
|
|
|
|
|
|
|
|
/* 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 */
|
|
|
|
|
1999-08-18 08:00:13 +02:00
|
|
|
#define RTYPE2HOWTO(cache_ptr, dst) \
|
|
|
|
((cache_ptr)->howto = \
|
|
|
|
((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \
|
|
|
|
? howto_table + (dst)->r_type \
|
|
|
|
: NULL))
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
/* 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 (abfd, 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 + ptr->value); \
|
|
|
|
else \
|
|
|
|
cache_ptr->addend = 0; \
|
|
|
|
if (ptr && 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. The only difference between this
|
|
|
|
and the regular routine is that we don't want to do anything for a
|
|
|
|
relocateable link. */
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean coff_pe_i386_relocate_section
|
1999-05-03 09:29:11 +02:00
|
|
|
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
|
|
|
|
struct internal_reloc *, struct internal_syment *, asection **));
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean
|
1999-05-03 09:29:11 +02:00
|
|
|
coff_pe_i386_relocate_section (output_bfd, info, input_bfd,
|
|
|
|
input_section, contents, relocs, syms,
|
|
|
|
sections)
|
|
|
|
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;
|
|
|
|
{
|
|
|
|
if (info->relocateable)
|
2002-11-30 09:39:46 +01:00
|
|
|
return TRUE;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
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 (abfd, sec, rel, h, sym, addendp)
|
1999-07-12 12:30:21 +02:00
|
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
1999-05-03 09:29:11 +02:00
|
|
|
asection *sec;
|
|
|
|
struct internal_reloc *rel;
|
|
|
|
struct coff_link_hash_entry *h;
|
|
|
|
struct internal_syment *sym;
|
|
|
|
bfd_vma *addendp;
|
|
|
|
{
|
|
|
|
reloc_howto_type *howto;
|
|
|
|
|
1999-08-18 08:00:13 +02:00
|
|
|
if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))
|
|
|
|
{
|
|
|
|
bfd_set_error (bfd_error_bad_value);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
howto = howto_table + rel->r_type;
|
|
|
|
|
|
|
|
#ifdef COFF_WITH_PE
|
1999-08-18 08:00:13 +02:00
|
|
|
/* Cancel out code in _bfd_coff_generic_relocate_section. */
|
1999-05-03 09:29:11 +02:00
|
|
|
*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. */
|
1999-09-18 02:44:47 +02:00
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
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
|
|
|
|
relocateable link), we need to add in the final size of the
|
|
|
|
common symbol. */
|
1999-09-18 02:44:47 +02:00
|
|
|
if (h != NULL && h->root.type == bfd_link_hash_common)
|
1999-05-03 09:29:11 +02:00
|
|
|
*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;
|
|
|
|
}
|
|
|
|
|
2001-05-08 19:44:00 +02:00
|
|
|
if (rel->r_type == R_IMAGEBASE
|
|
|
|
&& (bfd_get_flavour(sec->output_section->owner)
|
|
|
|
== bfd_target_coff_flavour))
|
1999-05-03 09:29:11 +02:00
|
|
|
{
|
|
|
|
*addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
return howto;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define coff_bfd_reloc_type_lookup coff_i386_reloc_type_lookup
|
|
|
|
|
|
|
|
static reloc_howto_type *
|
|
|
|
coff_i386_reloc_type_lookup (abfd, code)
|
1999-07-12 12:30:21 +02:00
|
|
|
bfd *abfd ATTRIBUTE_UNUSED;
|
1999-05-03 09:29:11 +02:00
|
|
|
bfd_reloc_code_real_type code;
|
|
|
|
{
|
|
|
|
switch (code)
|
|
|
|
{
|
|
|
|
case BFD_RELOC_RVA:
|
1999-09-18 02:44:47 +02:00
|
|
|
return howto_table + R_IMAGEBASE;
|
1999-05-03 09:29:11 +02:00
|
|
|
case BFD_RELOC_32:
|
|
|
|
return howto_table + R_DIR32;
|
|
|
|
case BFD_RELOC_32_PCREL:
|
|
|
|
return howto_table + R_PCRLONG;
|
1999-09-18 02:44:47 +02:00
|
|
|
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;
|
1999-05-03 09:29:11 +02:00
|
|
|
default:
|
|
|
|
BFD_FAIL ();
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#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. */
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean coff_i386_is_local_label_name
|
|
|
|
PARAMS ((bfd *, const char *));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
static bfd_boolean
|
1999-05-03 09:29:11 +02:00
|
|
|
coff_i386_is_local_label_name (abfd, name)
|
|
|
|
bfd *abfd;
|
|
|
|
const char *name;
|
|
|
|
{
|
|
|
|
if (name[0] == 'L')
|
2002-11-30 09:39:46 +01:00
|
|
|
return TRUE;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
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
|
|
|
|
i386coff_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),
|
|
|
|
|
|
|
|
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC /* section flags */
|
1999-09-07 04:59:17 +02:00
|
|
|
#ifdef COFF_WITH_PE
|
2001-04-14 00:42:48 +02:00
|
|
|
| SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_READONLY
|
1999-05-03 09:29:11 +02:00
|
|
|
#endif
|
1999-09-07 04:59:17 +02:00
|
|
|
| SEC_CODE | SEC_DATA),
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
#ifdef TARGET_UNDERSCORE
|
|
|
|
TARGET_UNDERSCORE, /* leading underscore */
|
|
|
|
#else
|
|
|
|
0, /* leading underscore */
|
|
|
|
#endif
|
|
|
|
'/', /* ar_pad_char */
|
|
|
|
15, /* ar_max_namelen */
|
|
|
|
|
|
|
|
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 */
|
|
|
|
|
2000-11-10 21:55:44 +01:00
|
|
|
/* Note that we allow an object file to be treated as a core file as well. */
|
1999-12-17 20:03:09 +01:00
|
|
|
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
|
|
|
bfd_generic_archive_p, coff_object_p},
|
1999-05-03 09:29:11 +02:00
|
|
|
{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
|
|
|
|
bfd_false},
|
|
|
|
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
|
|
|
|
_bfd_write_archive_contents, bfd_false},
|
|
|
|
|
|
|
|
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),
|
|
|
|
|
1999-07-19 16:55:16 +02:00
|
|
|
NULL,
|
1999-09-18 02:44:47 +02:00
|
|
|
|
1999-07-19 16:55:16 +02:00
|
|
|
COFF_SWAP_TABLE
|
1999-05-03 09:29:11 +02:00
|
|
|
};
|