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binutils-gdb/bfd/coff-rs6000.c
Ian Lance Taylor 4002f18a05 Made sure that every call to bfd_read, bfd_write, and bfd_seek 
checks the return value and handled bfd_error correctly.  These
	changes are not itemised.
1994-04-04 22:49:04 +00:00

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/* BFD back-end for IBM RS/6000 "XCOFF" files.
Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
FIXME: Can someone provide a transliteration of this name into ASCII?
Using the following chars caused a compiler warning on HIUX (so I replaced
them with octal escapes), and isn't useful without an understanding of what
character set it is.
Written by Metin G. Ozisik, Mimi Ph\373\364ng-Th\345o V\365,
and John Gilmore.
Archive support from Damon A. Permezel.
Contributed by IBM Corporation and 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This port currently only handles reading object files, except when
compiled on an RS/6000 host. -- no archive support, no core files.
In all cases, it does not support writing.
FIXMEmgo comments are left from Metin Ozisik's original port. */
/* Internalcoff.h and coffcode.h modify themselves based on this flag. */
#define RS6000COFF_C 1
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"
#include "coff/internal.h"
#include "coff/rs6000.h"
#include "libcoff.h"
/* The main body of code is in coffcode.h. */
/* The XCOFF reloc table. Actually, XCOFF relocations specify the
bitsize and whether they are signed or not, along with a
conventional type. This table is for the types, which are used for
different algorithms for putting in the reloc. Many of these
relocs need special_function entries, which I have not written. */
static reloc_howto_type rs6000coff_howto_table[] =
{
/* Standard 32 bit relocation. */
HOWTO (0, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_POS", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* 32 bit relocation, but store negative value. */
HOWTO (1, /* type */
0, /* rightshift */
-2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_NEG", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* 32 bit PC relative relocation. */
HOWTO (2, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"R_REL", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* 16 bit TOC relative relocation. */
HOWTO (3, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"R_TOC", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* I don't really know what this is. */
HOWTO (4, /* type */
1, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RTB", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* External TOC relative symbol. */
HOWTO (5, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_GL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Local TOC relative symbol. */
HOWTO (6, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_TCL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
{ 7 },
/* Non modifiable absolute branch. */
HOWTO (8, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_BA", /* name */
true, /* partial_inplace */
0x3fffffc, /* src_mask */
0x3fffffc, /* dst_mask */
false), /* pcrel_offset */
{ 9 },
/* Non modifiable relative branch. */
HOWTO (0xa, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
true, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"R_BR", /* name */
true, /* partial_inplace */
0x3fffffc, /* src_mask */
0x3fffffc, /* dst_mask */
false), /* pcrel_offset */
{ 0xb },
/* Indirect load. */
HOWTO (0xc, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Load address. */
HOWTO (0xd, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RLA", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
{ 0xe },
/* Non-relocating reference. */
HOWTO (0xf, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_REF", /* name */
false, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
{ 0x10 },
{ 0x11 },
/* TOC relative indirect load. */
HOWTO (0x12, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_TRL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* TOC relative load address. */
HOWTO (0x13, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_TRLA", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable relative branch. */
HOWTO (0x14, /* type */
1, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RRTBI", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable absolute branch. */
HOWTO (0x15, /* type */
1, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RRTBA", /* name */
true, /* partial_inplace */
0xffffffff, /* src_mask */
0xffffffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable call absolute indirect. */
HOWTO (0x16, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_CAI", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable call relative. */
HOWTO (0x17, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_REL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable branch absolute. */
HOWTO (0x18, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RBA", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable branch absolute. */
HOWTO (0x19, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_RBAC", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable branch relative. */
HOWTO (0x1a, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
26, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
0, /* special_function */
"R_REL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false), /* pcrel_offset */
/* Modifiable branch absolute. */
HOWTO (0x1b, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
false, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
0, /* special_function */
"R_REL", /* name */
true, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
false) /* pcrel_offset */
};
#define RTYPE2HOWTO(cache_ptr, dst) rs6000coff_rtype2howto (cache_ptr, dst)
static void rs6000coff_rtype2howto PARAMS ((arelent *,
struct internal_reloc *));
static void
rs6000coff_rtype2howto (relent, internal)
arelent *relent;
struct internal_reloc *internal;
{
relent->howto = rs6000coff_howto_table + internal->r_type;
/* The r_size field of an XCOFF reloc encodes the bitsize of the
relocation, as well as indicating whether it is signed or not.
Doublecheck that the relocation information gathered from the
type matches this information. */
if (relent->howto->bitsize != (internal->r_size & 0x1f) + 1)
abort ();
#if 0
if ((internal->r_size & 0x80) != 0
? (relent->howto->complain_on_overflow != complain_overflow_signed)
: (relent->howto->complain_on_overflow != complain_overflow_bitfield))
abort ();
#endif
}
#define coff_bfd_reloc_type_lookup rs6000coff_reloc_type_lookup
static const struct reloc_howto_struct *rs6000coff_reloc_type_lookup
PARAMS ((bfd *, bfd_reloc_code_real_type));
static const struct reloc_howto_struct *
rs6000coff_reloc_type_lookup (abfd, code)
bfd *abfd;
bfd_reloc_code_real_type code;
{
switch (code)
{
case BFD_RELOC_PPC_B26:
return &rs6000coff_howto_table[0xa];
case BFD_RELOC_PPC_BA26:
return &rs6000coff_howto_table[8];
case BFD_RELOC_PPC_TOC16:
return &rs6000coff_howto_table[3];
case BFD_RELOC_32:
return &rs6000coff_howto_table[0];
default:
return NULL;
}
}
#define SELECT_RELOC(internal, howto) \
{ \
internal.r_type = howto->type; \
internal.r_size = \
((howto->complain_on_overflow == complain_overflow_signed \
? 0x80 \
: 0) \
| (howto->bitsize - 1)); \
}
#define COFF_LONG_FILENAMES
#include "coffcode.h"
#define coff_archive_p bfd_generic_archive_p
#define coff_mkarchive _bfd_generic_mkarchive
#ifdef HOST_AIX
/* ------------------------------------------------------------------------ */
/* Support for archive file stuff.. */
/* Stolen from Damon A. Permezel's `bfd' portation. */
/* ------------------------------------------------------------------------ */
#undef coff_openr_next_archived_file
#define coff_openr_next_archived_file rs6000coff_openr_next_archived_file
#undef coff_write_armap
#define coff_write_armap rs6000coff_write_armap
#undef coff_stat_arch_elt
#define coff_stat_arch_elt rs6000coff_stat_arch_elt
#undef coff_snarf_ar_hdr
#define coff_snarf_ar_hdr rs6000coff_snarf_ar_hdr
#undef coff_mkarchive
#define coff_mkarchive rs6000coff_mkarchive
#undef coff_archive_p
#define coff_archive_p rs6000coff_archive_p
#include "/usr/include/ar.h" /* <ar.h> doesn't do it. */
#define arch_hdr(bfd) \
((struct ar_hdr *) \
(((struct areltdata *)((bfd)->arelt_data))->arch_header))
static boolean
rs6000coff_mkarchive (abfd)
bfd *abfd;
{
bfd_set_error (bfd_error_invalid_operation); /* write not supported */
return false;
}
/* This functions reads an arch header and returns an areltdata pointer, or
NULL on error.
Presumes the file pointer is already in the right place (ie pointing
to the ar_hdr in the file). Moves the file pointer; on success it
should be pointing to the front of the file contents; on failure it
could have been moved arbitrarily.
*/
struct areltdata *
rs6000coff_snarf_ar_hdr (abfd)
bfd *abfd;
{
struct {
struct ar_hdr hdr;
char namebuf[256];
} h;
int size;
struct areltdata *ared;
char *allocptr;
size = sizeof (h.hdr);
if (bfd_read(&h.hdr, 1, size, abfd) != size) {
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_no_more_archived_files);
return NULL;
}
size = atoi(h.hdr.ar_namlen); /* ar_name[] length */
size += size & 1;
if (bfd_read(&h.hdr._ar_name.ar_name[2], 1, size, abfd) != size) {
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_no_more_archived_files);
return NULL;
}
if (strncmp(h.hdr._ar_name.ar_fmag + size, AIAFMAG, 2)) {
bfd_set_error (bfd_error_malformed_archive);
return NULL;
}
h.hdr._ar_name.ar_name[size] = 0; /* terminate filename */
/*
* if the filename is NULL, we're (probably) at the end.
*/
if (size == 0) {
bfd_set_error (bfd_error_no_more_archived_files);
return NULL;
}
size += sizeof (h.hdr);
allocptr = bfd_zalloc(abfd, sizeof (*ared) + size);
if (allocptr == NULL) {
bfd_set_error (bfd_error_no_memory);
return NULL;
}
ared = (struct areltdata *) allocptr;
ared->arch_header = (void *) (allocptr + sizeof (struct areltdata));
memcpy ((char *) ared->arch_header, &h.hdr, size);
ared->parsed_size = atoi(h.hdr.ar_size);
ared->filename = ((AR_HDR*) ared->arch_header)->_ar_name.ar_name;
return ared;
}
/* Stolen directly from archive.c, except it calls rs6000coff_snarf_ar_hdr.
Why wasn't this part of the transfer vector? */
bfd *
rs6000coff_get_elt_at_filepos (archive, filepos)
bfd *archive;
file_ptr filepos;
{
struct areltdata *new_areldata;
bfd *n_nfd;
n_nfd = _bfd_look_for_bfd_in_cache (archive, filepos);
if (n_nfd) return n_nfd;
if (0 != bfd_seek (archive, filepos, SEEK_SET))
return NULL;
if ((new_areldata = rs6000coff_snarf_ar_hdr (archive)) == NULL) return NULL;
n_nfd = _bfd_create_empty_archive_element_shell (archive);
if (n_nfd == NULL) {
bfd_release (archive, (PTR)new_areldata);
return NULL;
}
n_nfd->origin = bfd_tell (archive);
n_nfd->arelt_data = (PTR) new_areldata;
n_nfd->filename = new_areldata->filename;
if (_bfd_add_bfd_to_archive_cache (archive, filepos, n_nfd))
return n_nfd;
/* huh? */
bfd_release (archive, (PTR)n_nfd);
bfd_release (archive, (PTR)new_areldata);
return NULL;
}
/*
* xcoff_openr_next_archived_file - xcoff has nxt/prv seek addrs.
*/
static bfd *
rs6000coff_openr_next_archived_file(archive, last_file)
bfd *archive, *last_file;
{
file_ptr filestart;
if (!last_file)
filestart = bfd_ardata(archive)->first_file_filepos;
else
filestart = atol(arch_hdr(last_file)->ar_nxtmem);
return rs6000coff_get_elt_at_filepos (archive, filestart);
}
static bfd_target *
rs6000coff_archive_p (abfd)
bfd *abfd;
{
struct fl_hdr hdr;
register struct artdata *art;
if (bfd_read (&hdr, sizeof (hdr), 1, abfd) != sizeof (hdr)) {
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return 0;
}
if (strncmp(hdr.fl_magic, AIAMAG, SAIAMAG)) {
bfd_set_error (bfd_error_wrong_format);
return 0;
}
/*
* bfd_ardata() accesses the bfd->tdata field.
*/
abfd->tdata.aout_ar_data =
(void *) bfd_zalloc(abfd, sizeof (*art) + sizeof (hdr));
if ((art = bfd_ardata (abfd)) == NULL) {
bfd_set_error (bfd_error_no_memory);
return 0;
}
art->first_file_filepos = atoi(hdr.fl_fstmoff);
*(struct fl_hdr *) (1 + art) = hdr;
/* Someday...
* slurp in the member table, which I think is the armap equivalent.
xcoff_slurp_armap(abfd);
*/
return abfd->xvec;
}
static int
rs6000coff_stat_arch_elt(abfd, buf)
bfd *abfd;
struct stat *buf;
{
struct ar_hdr *hdr;
char *aloser;
if (abfd->arelt_data == NULL) {
bfd_set_error (bfd_error_invalid_operation);
return -1;
}
hdr = arch_hdr (abfd);
#define foo(arelt, stelt, size) \
buf->stelt = strtol (hdr->arelt, &aloser, size); \
if (aloser == hdr->arelt) return -1;
foo (ar_date, st_mtime, 10);
foo (ar_uid, st_uid, 10);
foo (ar_gid, st_gid, 10);
foo (ar_mode, st_mode, 8);
foo (ar_size, st_size, 10);
#undef foo
return 0;
}
static boolean
rs6000coff_write_armap (arch, elength, map, orl_count, stridx)
bfd *arch;
unsigned int elength;
struct orl *map;
unsigned int orl_count;
int stridx;
{
bfd_set_error (bfd_error_invalid_operation);
return false;
}
#endif /* HOST_AIX */
#define CORE_FILE_P _bfd_dummy_target
#ifdef HOST_AIX
#undef CORE_FILE_P
#define CORE_FILE_P rs6000coff_core_p
extern bfd_target * rs6000coff_core_p ();
extern boolean rs6000coff_get_section_contents ();
extern boolean rs6000coff_core_file_matches_executable_p ();
#undef coff_core_file_matches_executable_p
#define coff_core_file_matches_executable_p \
rs6000coff_core_file_matches_executable_p
#undef coff_get_section_contents
#define coff_get_section_contents rs6000coff_get_section_contents
#endif /* HOST_AIX */
#ifdef HOST_LYNX
#undef CORE_FILE_P
#define CORE_FILE_P lynx_core_file_p
extern bfd_target *lynx_core_file_p PARAMS ((bfd *abfd));
extern boolean lynx_core_file_matches_executable_p PARAMS ((bfd *core_bfd,
bfd *exec_bfd));
#undef coff_core_file_matches_executable_p
#define coff_core_file_matches_executable_p lynx_core_file_matches_executable_p
extern char *lynx_core_file_failing_command PARAMS ((bfd *abfd));
#undef coff_core_file_failing_command
#define coff_core_file_failing_command lynx_core_file_failing_command
extern int lynx_core_file_failing_signal PARAMS ((bfd *abfd));
#undef coff_core_file_failing_signal
#define coff_core_file_failing_signal lynx_core_file_failing_signal
#endif /* HOST_LYNX */
/* The transfer vector that leads the outside world to all of the above. */
bfd_target rs6000coff_vec =
{
"aixcoff-rs6000", /* name */
bfd_target_coff_flavour,
true, /* data byte order is big */
true, /* header byte order is big */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
0, /* leading char */
'/', /* ar_pad_char */
15, /* ar_max_namelen??? FIXMEmgo */
3, /* default alignment power */
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
coff_archive_p, CORE_FILE_P},
{bfd_false, coff_mkobject, coff_mkarchive, /* bfd_set_format */
bfd_false},
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(coff),
COFF_SWAP_TABLE,
};
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