binutils-gdb/bfd/aoutf1.h

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/* A.out "format 1" file handling code
Copyright (C) 1990-1991 Free Software Foundation, Inc.
Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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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.
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This program is distributed in the hope that it will be useful,
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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. */
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#include "bfd.h"
#include "sysdep.h"
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#include "libbfd.h"
#include "aout/sun4.h"
#include "libaout.h" /* BFD a.out internal data structures */
#include "aout/aout64.h"
#include "aout/stab_gnu.h"
#include "aout/ar.h"
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/*
The file @code{aoutf1.h} contains the code for BFD's
a.out back end. Control over the generated back end is given by these
two preprocessor names:
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@table @code
@item ARCH_SIZE
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This value should be either 32 or 64, depending upon the size of an
int in the target format. It changes the sizes of the structs which
perform the memory/disk mapping of structures.
The 64 bit backend may only be used if the host compiler supports 64
ints (eg long long with gcc), by defining the name @code{HOST_64_BIT} in @code{bfd.h}.
With this name defined, @emph{all} bfd operations are performed with 64bit
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arithmetic, not just those to a 64bit target.
@item TARGETNAME
The name put into the target vector.
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@item
@end table
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*/
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void (*bfd_error_trap)();
static bfd_target *sunos4_callback ();
/*SUPPRESS558*/
/*SUPPRESS529*/
bfd_target *
DEFUN(NAME(sunos,object_p), (abfd),
bfd *abfd)
{
struct external_exec exec_bytes; /* Raw exec header from file */
struct internal_exec exec; /* Cleaned-up exec header */
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if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
!= EXEC_BYTES_SIZE) {
bfd_error = wrong_format;
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return 0;
}
exec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
if (N_BADMAG (exec)) return 0;
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NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, &exec);
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return NAME(aout,some_aout_object_p) (abfd, &exec, sunos4_callback);
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}
/* Determine the size of a relocation entry, based on the architecture */
static void
DEFUN(choose_reloc_size,(abfd),
bfd *abfd)
{
switch (bfd_get_arch(abfd)) {
case bfd_arch_sparc:
case bfd_arch_a29k:
obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
break;
default:
obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
break;
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}
}
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/* Set parameters about this a.out file that are machine-dependent.
This routine is called from some_aout_object_p just before it returns. */
static bfd_target *
sunos4_callback (abfd)
bfd *abfd;
{
struct internal_exec *execp = exec_hdr (abfd);
enum bfd_architecture arch;
long machine;
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WORK_OUT_FILE_POSITIONS(abfd, execp);
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/* Determine the architecture and machine type of the object file. */
switch (N_MACHTYPE (*exec_hdr (abfd))) {
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case M_UNKNOWN:
/* Some Sun3s make magic numbers without cpu types in them, so
we'll default to the 68020. */
arch = bfd_arch_m68k;
machine = 68020;
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break;
case M_68010:
case M_HP200:
arch = bfd_arch_m68k;
machine = 68010;
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break;
case M_68020:
case M_HP300:
arch = bfd_arch_m68k;
machine = 68020;
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break;
case M_SPARC:
arch = bfd_arch_sparc;
machine = 0;
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break;
case M_386:
arch = bfd_arch_i386;
machine = 0;
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break;
case M_29K:
arch = bfd_arch_a29k;
machine = 0;
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break;
case M_HPUX:
arch = bfd_arch_m68k;
machine = 0;
break;
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default:
arch = bfd_arch_obscure;
machine = 0;
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break;
}
bfd_set_arch_mach(abfd, arch, machine);
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choose_reloc_size(abfd);
adata(abfd)->page_size = PAGE_SIZE;
#ifdef SEGMENT_SIZE
adata(abfd)->segment_size = SEGMENT_SIZE;
#else
adata(abfd)->segment_size = PAGE_SIZE;
#endif
adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
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return abfd->xvec;
}
/* Write an object file in SunOS format.
Section contents have already been written. We write the
file header, symbols, and relocation. */
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static boolean
DEFUN(NAME(aout,sunos4_write_object_contents),
(abfd),
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bfd *abfd)
{
bfd_size_type data_pad = 0;
struct external_exec exec_bytes;
struct internal_exec *execp = exec_hdr (abfd);
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execp->a_text = obj_textsec (abfd)->size;
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/* Magic number, maestro, please! */
switch (bfd_get_arch(abfd)) {
case bfd_arch_m68k:
switch (bfd_get_mach(abfd)) {
case 68010:
N_SET_MACHTYPE(*execp, M_68010);
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break;
default:
case 68020:
N_SET_MACHTYPE(*execp, M_68020);
break;
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}
break;
case bfd_arch_sparc:
N_SET_MACHTYPE(*execp, M_SPARC);
break;
case bfd_arch_i386:
N_SET_MACHTYPE(*execp, M_386);
break;
case bfd_arch_a29k:
N_SET_MACHTYPE(*execp, M_29K);
break;
default:
N_SET_MACHTYPE(*execp, M_UNKNOWN);
}
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choose_reloc_size(abfd);
/* FIXME */
N_SET_FLAGS (*execp, 0x1);
WRITE_HEADERS(abfd, execp);
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return true;
}
/* core files */
#define CORE_MAGIC 0x080456
#define CORE_NAMELEN 16
/* The core structure is taken from the Sun documentation.
Unfortunately, they don't document the FPA structure, or at least I
can't find it easily. Fortunately the core header contains its own
length. So this shouldn't cause problems, except for c_ucode, which
so far we don't use but is easy to find with a little arithmetic. */
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/* But the reg structure can be gotten from the SPARC processor handbook.
This really should be in a GNU include file though so that gdb can use
the same info. */
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struct regs {
int r_psr;
int r_pc;
int r_npc;
int r_y;
int r_g1;
int r_g2;
int r_g3;
int r_g4;
int r_g5;
int r_g6;
int r_g7;
int r_o0;
int r_o1;
int r_o2;
int r_o3;
int r_o4;
int r_o5;
int r_o6;
int r_o7;
};
/* Taken from Sun documentation: */
/* FIXME: It's worse than we expect. This struct contains TWO substructs
neither of whose size we know, WITH STUFF IN BETWEEN THEM! We can't
even portably access the stuff in between! */
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struct external_sparc_core {
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int c_magic; /* Corefile magic number */
int c_len; /* Sizeof (struct core) */
#define SPARC_CORE_LEN 432
int c_regs[19]; /* General purpose registers -- MACHDEP SIZE */
struct external_exec c_aouthdr; /* A.out header */
int c_signo; /* Killing signal, if any */
int c_tsize; /* Text size (bytes) */
int c_dsize; /* Data size (bytes) */
int c_ssize; /* Stack size (bytes) */
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char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
double fp_stuff[1]; /* external FPU state (size unknown by us) */
/* The type "double" is critical here, for alignment.
SunOS declares a struct here, but the struct's alignment
is double since it contains doubles. */
int c_ucode; /* Exception no. from u_code */
/* (this member is not accessible by name since we don't
portably know the size of fp_stuff.) */
};
struct external_sun3_core {
int c_magic; /* Corefile magic number */
int c_len; /* Sizeof (struct core) */
#define SUN3_CORE_LEN 826 /* As of SunOS 4.1.1 */
int c_regs[18]; /* General purpose registers -- MACHDEP SIZE */
struct external_exec c_aouthdr; /* A.out header */
int c_signo; /* Killing signal, if any */
int c_tsize; /* Text size (bytes) */
int c_dsize; /* Data size (bytes) */
int c_ssize; /* Stack size (bytes) */
char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
double fp_stuff[1]; /* external FPU state (size unknown by us) */
/* The type "double" is critical here, for alignment.
SunOS declares a struct here, but the struct's alignment
is double since it contains doubles. */
int c_ucode; /* Exception no. from u_code */
/* (this member is not accessible by name since we don't
portably know the size of fp_stuff.) */
};
struct internal_sunos_core {
int c_magic; /* Corefile magic number */
int c_len; /* Sizeof (struct core) */
long c_regs_pos; /* file offset of General purpose registers */
int c_regs_size; /* size of General purpose registers */
struct internal_exec c_aouthdr; /* A.out header */
int c_signo; /* Killing signal, if any */
int c_tsize; /* Text size (bytes) */
int c_dsize; /* Data size (bytes) */
int c_ssize; /* Stack size (bytes) */
long c_stacktop; /* Stack top (address) */
char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
long fp_stuff_pos; /* file offset of external FPU state (regs) */
int fp_stuff_size; /* Size of it */
int c_ucode; /* Exception no. from u_code */
};
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/* byte-swap in the Sun-3 core structure */
static void
DEFUN(swapcore_sun3,(abfd, ext, intcore),
bfd *abfd AND
char *ext AND
struct internal_sunos_core *intcore)
{
struct external_sun3_core *extcore = (struct external_sun3_core *)ext;
intcore->c_magic = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_magic);
intcore->c_len = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_len );
intcore->c_regs_pos = (long) (((struct external_sun3_core *)0)->c_regs);
intcore->c_regs_size = sizeof (extcore->c_regs);
NAME(aout,swap_exec_header_in)(abfd, &extcore->c_aouthdr,&intcore->c_aouthdr);
intcore->c_signo = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_signo);
intcore->c_tsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_tsize);
intcore->c_dsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_dsize);
intcore->c_ssize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_ssize);
bcopy (extcore->c_cmdname, intcore->c_cmdname, sizeof (intcore->c_cmdname));
intcore->fp_stuff_pos = (long) (((struct external_sun3_core *)0)->fp_stuff);
/* FP stuff takes up whole rest of struct, except c_ucode. */
intcore->fp_stuff_size = intcore->c_len - (sizeof extcore->c_ucode) -
(file_ptr)(((struct external_sun3_core *)0)->fp_stuff);
/* Ucode is the last thing in the struct -- just before the end */
intcore->c_ucode =
bfd_h_get_32 (abfd,
intcore->c_len - sizeof (extcore->c_ucode) + (unsigned char *)extcore);
intcore->c_stacktop = 0x0E000000; /* By experimentation */
}
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/* byte-swap in the Sparc core structure */
static void
DEFUN(swapcore_sparc,(abfd, ext, intcore),
bfd *abfd AND
char *ext AND
struct internal_sunos_core *intcore)
{
struct external_sparc_core *extcore = (struct external_sparc_core *)ext;
intcore->c_magic = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_magic);
intcore->c_len = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_len );
intcore->c_regs_pos = (long) (((struct external_sparc_core *)0)->c_regs);
intcore->c_regs_size = sizeof (extcore->c_regs);
NAME(aout,swap_exec_header_in)(abfd, &extcore->c_aouthdr,&intcore->c_aouthdr);
intcore->c_signo = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_signo);
intcore->c_tsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_tsize);
intcore->c_dsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_dsize);
intcore->c_ssize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_ssize);
bcopy (extcore->c_cmdname, intcore->c_cmdname, sizeof (intcore->c_cmdname));
intcore->fp_stuff_pos = (long) (((struct external_sparc_core *)0)->fp_stuff);
/* FP stuff takes up whole rest of struct, except c_ucode. */
intcore->fp_stuff_size = intcore->c_len - (sizeof extcore->c_ucode) -
(file_ptr)(((struct external_sparc_core *)0)->fp_stuff);
/* Ucode is the last thing in the struct -- just before the end */
intcore->c_ucode =
bfd_h_get_32 (abfd,
intcore->c_len - sizeof (extcore->c_ucode) + (unsigned char *)extcore);
/* Supposedly the user stack grows downward from the bottom of kernel memory.
Presuming that this remains true, this definition will work. */
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#define SPARC_USRSTACK (-(128*1024*1024))
intcore->c_stacktop = SPARC_USRSTACK; /* By experimentation */
}
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/* need this cast because ptr is really void * */
#define core_hdr(bfd) (((struct suncoredata *) (bfd->tdata))->hdr)
#define core_datasec(bfd) (((struct suncoredata *) ((bfd)->tdata))->data_section)
#define core_stacksec(bfd) (((struct suncoredata*)((bfd)->tdata))->stack_section)
#define core_regsec(bfd) (((struct suncoredata *) ((bfd)->tdata))->reg_section)
#define core_reg2sec(bfd) (((struct suncoredata *) ((bfd)->tdata))->reg2_section)
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/* These are stored in the bfd's tdata */
struct suncoredata {
struct internal_sunos_core *hdr; /* core file header */
asection *data_section;
asection *stack_section;
asection *reg_section;
asection *reg2_section;
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};
static bfd_target *
DEFUN(sunos4_core_file_p,(abfd),
bfd *abfd)
{
unsigned char longbuf[4]; /* Raw bytes of various header fields */
int core_size;
int core_mag;
struct internal_sunos_core *core;
char *extcore;
struct mergem {
struct suncoredata suncoredata;
struct internal_sunos_core internal_sunos_core;
char external_core[1];
} *mergem;
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bfd_error = system_call_error;
if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) !=
sizeof (longbuf))
return 0;
core_mag = bfd_h_get_32 (abfd, longbuf);
if (core_mag != CORE_MAGIC) return 0;
/* SunOS core headers can vary in length; second word is size; */
if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) !=
sizeof (longbuf))
return 0;
core_size = bfd_h_get_32 (abfd, longbuf);
/* Sanity check */
if (core_size > 20000)
return 0;
if (bfd_seek (abfd, 0L, false) < 0) return 0;
mergem = (struct mergem *)bfd_zalloc (abfd, core_size + sizeof (struct mergem));
if (mergem == NULL) {
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bfd_error = no_memory;
return 0;
}
extcore = mergem->external_core;
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if ((bfd_read ((PTR) extcore, 1, core_size, abfd)) != core_size) {
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bfd_error = system_call_error;
bfd_release (abfd, (char *)mergem);
return 0;
}
/* Validate that it's a core file we know how to handle, due to sun
botching the positioning of registers and other fields in a machine
dependent way. */
core = &mergem->internal_sunos_core;
switch (core_size) {
case SPARC_CORE_LEN:
swapcore_sparc (abfd, extcore, core);
break;
case SUN3_CORE_LEN:
swapcore_sun3 (abfd, extcore, core);
break;
default:
bfd_error = system_call_error; /* FIXME */
bfd_release (abfd, (char *)mergem);
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return 0;
}
set_tdata (abfd, &mergem->suncoredata);
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core_hdr (abfd) = core;
/* create the sections. This is raunchy, but bfd_close wants to reclaim
them */
core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_stacksec (abfd) == NULL) {
loser:
bfd_error = no_memory;
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bfd_release (abfd, (char *)mergem);
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return 0;
}
core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_datasec (abfd) == NULL) {
loser1:
bfd_release (abfd, core_stacksec (abfd));
goto loser;
}
core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_regsec (abfd) == NULL) {
loser2:
bfd_release (abfd, core_datasec (abfd));
goto loser1;
}
core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_reg2sec (abfd) == NULL) {
bfd_release (abfd, core_regsec (abfd));
goto loser2;
}
core_stacksec (abfd)->name = ".stack";
core_datasec (abfd)->name = ".data";
core_regsec (abfd)->name = ".reg";
core_reg2sec (abfd)->name = ".reg2";
core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
core_reg2sec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
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core_stacksec (abfd)->size = core->c_ssize;
core_datasec (abfd)->size = core->c_dsize;
core_regsec (abfd)->size = core->c_regs_size;
core_reg2sec (abfd)->size = core->fp_stuff_size;
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core_stacksec (abfd)->vma = (core->c_stacktop - core->c_ssize);
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core_datasec (abfd)->vma = N_DATADDR(core->c_aouthdr);
core_regsec (abfd)->vma = 0;
core_reg2sec (abfd)->vma = 0;
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core_stacksec (abfd)->filepos = core->c_len + core->c_dsize;
core_datasec (abfd)->filepos = core->c_len;
/* We'll access the regs afresh in the core file, like any section: */
core_regsec (abfd)->filepos = (file_ptr)core->c_regs_pos;
core_reg2sec (abfd)->filepos = (file_ptr)core->fp_stuff_pos;
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/* Align to word at least */
core_stacksec (abfd)->alignment_power = 2;
core_datasec (abfd)->alignment_power = 2;
core_regsec (abfd)->alignment_power = 2;
core_reg2sec (abfd)->alignment_power = 2;
abfd->sections = core_stacksec (abfd);
core_stacksec (abfd)->next = core_datasec (abfd);
core_datasec (abfd)->next = core_regsec (abfd);
core_regsec (abfd)->next = core_reg2sec (abfd);
abfd->section_count = 4;
return abfd->xvec;
}
static char *sunos4_core_file_failing_command (abfd)
bfd *abfd;
{
return core_hdr (abfd)->c_cmdname;
}
static int
DEFUN(sunos4_core_file_failing_signal,(abfd),
bfd *abfd)
{
return core_hdr (abfd)->c_signo;
}
static boolean
DEFUN(sunos4_core_file_matches_executable_p, (core_bfd, exec_bfd),
bfd *core_bfd AND
bfd *exec_bfd)
{
if (core_bfd->xvec != exec_bfd->xvec) {
bfd_error = system_call_error;
return false;
}
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return (bcmp ((char *)&core_hdr (core_bfd)->c_aouthdr,
(char *) exec_hdr (exec_bfd),
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sizeof (struct internal_exec)) == 0) ? true : false;
}
#define MY_core_file_failing_command sunos4_core_file_failing_command
#define MY_core_file_failing_signal sunos4_core_file_failing_signal
#define MY_core_file_matches_executable_p sunos4_core_file_matches_executable_p
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#define MY_bfd_debug_info_start bfd_void
#define MY_bfd_debug_info_end bfd_void
#define MY_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
#define MY_object_p NAME(sunos,object_p)
#define MY_core_file_p sunos4_core_file_p
#define MY_write_object_contents NAME(aout,sunos4_write_object_contents)
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#define TARGET_IS_BIG_ENDIAN_P
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#include "aout-target.h"