binutils-gdb/bfd/sunos.c

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/* BFD backend for sunos binaries */
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/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Diddler.
BFD 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 1, or (at your option)
any later version.
BFD 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 BFD; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* $Id$ */
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#include <ansidecl.h>
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#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "a.out.sun4.h"
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#include "a.out.gnu.h"
#include "stab.gnu.h"
#include "ar.h"
#include "liba.out.h" /* BFD a.out internal data structures */
void (*bfd_error_trap)();
static bfd_target *sunos4_callback ();
/*SUPPRESS558*/
/*SUPPRESS529*/
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bfd_target *
sunos4_object_p (abfd)
bfd *abfd;
{
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unsigned char magicbuf[4]; /* Raw bytes of magic number from file */
unsigned long magic; /* Swapped magic number */
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bfd_error = system_call_error;
if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) !=
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sizeof (magicbuf))
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return 0;
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magic = bfd_h_getlong (abfd, magicbuf);
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if (N_BADMAG (*((struct exec *) &magic))) return 0;
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return some_aout_object_p (abfd, 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 (abfd->obj_arch) {
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;
}
}
/* Set parameters about this a.out file that are machine-dependent.
This routine is called from some_aout_object_p just before it returns. */
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static bfd_target *
sunos4_callback (abfd)
bfd *abfd;
{
struct exec *execp = exec_hdr (abfd);
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/* The virtual memory addresses of the sections */
obj_datasec (abfd)->vma = N_DATADDR(*execp);
obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
obj_textsec (abfd)->vma = N_TXTADDR(*execp);
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/* The file offsets of the sections */
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obj_textsec (abfd)->filepos = EXEC_BYTES_SIZE; /*N_TXTOFF(*execp);*/
obj_datasec (abfd)->filepos = N_DATOFF(*execp);
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/* The file offsets of the relocation info */
obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
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/* The file offsets of the string table and symbol table. */
obj_str_filepos (abfd) = N_STROFF (*execp);
obj_sym_filepos (abfd) = N_SYMOFF (*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:
abfd->obj_arch = bfd_arch_unknown;
abfd->obj_machine = 0;
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break;
case M_68010:
abfd->obj_arch = bfd_arch_m68k;
abfd->obj_machine = 68010;
break;
case M_68020:
abfd->obj_arch = bfd_arch_m68k;
abfd->obj_machine = 68020;
break;
case M_SPARC:
abfd->obj_arch = bfd_arch_sparc;
abfd->obj_machine = 0;
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break;
case M_386:
abfd->obj_arch = bfd_arch_i386;
abfd->obj_machine = 0;
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break;
case M_29K:
abfd->obj_arch = bfd_arch_a29k;
abfd->obj_machine = 0;
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break;
default:
abfd->obj_arch = bfd_arch_obscure;
abfd->obj_machine = 0;
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break;
}
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choose_reloc_size(abfd);
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return abfd->xvec;
}
boolean
sunos4_mkobject (abfd)
bfd *abfd;
{
char *rawptr;
bfd_error = system_call_error;
/* Use an intermediate variable for clarity */
rawptr = bfd_zalloc (abfd, sizeof (struct aoutdata) + sizeof (struct exec));
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if (rawptr == NULL) {
bfd_error = no_memory;
return false;
}
set_tdata (abfd, (struct aoutdata *) rawptr);
exec_hdr (abfd) = (struct exec *) (rawptr + sizeof (struct aoutdata));
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/* For simplicity's sake we just make all the sections right here. */
obj_textsec (abfd) = (asection *)NULL;
obj_datasec (abfd) = (asection *)NULL;
obj_bsssec (abfd) = (asection *)NULL;
bfd_make_section (abfd, ".text");
bfd_make_section (abfd, ".data");
bfd_make_section (abfd, ".bss");
return true;
}
/* Keep track of machine architecture and machine type for a.out's.
Return the machine_type for a particular arch&machine, or M_UNKNOWN
if that exact arch&machine can't be represented in a.out format.
If the architecture is understood, machine type 0 (default) should
always be understood. */
static enum machine_type
aout_machine_type (arch, machine)
enum bfd_architecture arch;
unsigned long machine;
{
enum machine_type arch_flags;
arch_flags = M_UNKNOWN;
switch (arch) {
case bfd_arch_sparc:
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if (machine == 0) arch_flags = M_SPARC;
break;
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case bfd_arch_m68k:
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switch (machine) {
case 0: arch_flags = M_68010; break;
case 68000: arch_flags = M_UNKNOWN; break;
case 68010: arch_flags = M_68010; break;
case 68020: arch_flags = M_68020; break;
default: arch_flags = M_UNKNOWN; break;
}
break;
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case bfd_arch_i386:
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if (machine == 0) arch_flags = M_386;
break;
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case bfd_arch_a29k:
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if (machine == 0) arch_flags = M_29K;
break;
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default:
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arch_flags = M_UNKNOWN;
break;
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}
return arch_flags;
}
/* 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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boolean
sunos4_write_object_contents (abfd)
bfd *abfd;
{
size_t data_pad = 0;
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unsigned char exec_bytes[EXEC_BYTES_SIZE];
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struct 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_architecture(abfd)) {
case bfd_arch_m68k:
switch (bfd_get_machine(abfd)) {
case 68010:
N_SET_MACHTYPE(*execp, M_68010);
break;
default:
case 68020:
N_SET_MACHTYPE(*execp, M_68020);
break;
}
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);
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N_SET_MAGIC (*execp, OMAGIC);
if (abfd->flags & D_PAGED) {
/* This is not strictly true, but will probably do for the default
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case. FIXME.
*/
execp->a_text = obj_textsec (abfd)->size + EXEC_BYTES_SIZE;
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N_SET_MAGIC (*execp, ZMAGIC);
} else if (abfd->flags & WP_TEXT) {
N_SET_MAGIC (*execp, NMAGIC);
}
N_SET_FLAGS (*execp, 0x1); /* copied from ld.c; who the hell knows? */
if (abfd->flags & D_PAGED)
{
data_pad = ((obj_datasec(abfd)->size + PAGE_SIZE -1)
& (- PAGE_SIZE)) - obj_datasec(abfd)->size;
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if (data_pad > obj_bsssec(abfd)->size)
execp->a_bss = 0;
else
execp->a_bss = obj_bsssec(abfd)->size - data_pad;
execp->a_data = obj_datasec(abfd)->size + data_pad;
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}
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else {
execp->a_data = obj_datasec (abfd)->size;
execp->a_bss = obj_bsssec (abfd)->size;
}
execp->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
execp->a_entry = bfd_get_start_address (abfd);
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execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
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execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
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bfd_aout_swap_exec_header_out (abfd, execp, exec_bytes);
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bfd_seek (abfd, 0L, false);
bfd_write ((PTR) exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
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/* Now write out reloc info, followed by syms and strings */
if (bfd_get_symcount (abfd) != 0)
{
bfd_seek (abfd,
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(long)(N_SYMOFF(*execp)), false);
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aout_write_syms (abfd);
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bfd_seek (abfd, (long)(N_TRELOFF(*execp)), false);
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if (!aout_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
bfd_seek (abfd, (long)(N_DRELOFF(*execp)), false);
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if (!aout_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
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}
return true;
}
/* core files */
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#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. */
/* 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. */
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: */
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/* 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 core {
int c_magic; /* Corefile magic number */
int c_len; /* Sizeof (struct core) */
struct regs c_regs; /* General purpose registers -- MACHDEP SIZE */
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struct 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) */
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/* The type "double" is critical here, for alignment.
SunOS declares a struct here, but the struct's alignment
is double since it contains doubles. */
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int c_ucode; /* Exception no. from u_code */
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/* (this member is not accessible by name since we don't
portably know the size of fp_stuff.) */
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};
/* Supposedly the user stack grows downward from the bottom of kernel memory.
Presuming that this remains true, this definition will work. */
#define USRSTACK (-(128*1024*1024))
PROTO (static void, swapcore, (bfd *abfd, struct core *core));
/* need this cast b/c ptr is really void * */
#define core_hdr(bfd) (((struct suncordata *) (bfd->tdata))->hdr)
#define core_datasec(bfd) (((struct suncordata *) ((bfd)->tdata))->data_section)
#define core_stacksec(bfd) (((struct suncordata*)((bfd)->tdata))->stack_section)
#define core_regsec(bfd) (((struct suncordata *) ((bfd)->tdata))->reg_section)
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#define core_reg2sec(bfd) (((struct suncordata *) ((bfd)->tdata))->reg2_section)
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/* These are stored in the bfd's tdata */
struct suncordata {
struct core *hdr; /* core file header */
asection *data_section;
asection *stack_section;
asection *reg_section;
asection *reg2_section;
};
bfd_target *
sunos4_core_file_p (abfd)
bfd *abfd;
{
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unsigned char longbuf[4]; /* Raw bytes of various header fields */
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int core_size;
int core_mag;
struct core *core;
char *rawptr;
bfd_error = system_call_error;
if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) !=
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sizeof (longbuf))
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return 0;
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core_mag = bfd_h_getlong (abfd, longbuf);
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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) !=
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sizeof (longbuf))
return 0;
core_size = bfd_h_getlong (abfd, longbuf);
/* Sanity check */
if (core_size > 20000)
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return 0;
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if (bfd_seek (abfd, 0L, false) < 0) return 0;
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rawptr = bfd_zalloc (abfd, core_size + sizeof (struct suncordata));
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if (rawptr == NULL) {
bfd_error = no_memory;
return 0;
}
core = (struct core *) (rawptr + sizeof (struct suncordata));
if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size) {
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bfd_error = system_call_error;
bfd_release (abfd, rawptr);
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return 0;
}
swapcore (abfd, core);
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set_tdata (abfd, ((struct suncordata *) rawptr));
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core_hdr (abfd) = core;
/* create the sections. This is raunchy, but bfd_close wants to reclaim
them */
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core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
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if (core_stacksec (abfd) == NULL) {
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loser:
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bfd_error = no_memory;
bfd_release (abfd, rawptr);
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return 0;
}
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core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
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if (core_datasec (abfd) == NULL) {
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loser1:
bfd_release (abfd, core_stacksec (abfd));
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goto loser;
}
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core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
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if (core_regsec (abfd) == NULL) {
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loser2:
bfd_release (abfd, core_datasec (abfd));
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goto loser1;
}
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core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
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if (core_reg2sec (abfd) == NULL) {
bfd_release (abfd, core_regsec (abfd));
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goto loser2;
}
core_stacksec (abfd)->name = ".stack";
core_datasec (abfd)->name = ".data";
core_regsec (abfd)->name = ".reg";
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core_reg2sec (abfd)->name = ".reg2";
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core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD;
core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD;
core_regsec (abfd)->flags = SEC_ALLOC;
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core_reg2sec (abfd)->flags = SEC_ALLOC;
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core_stacksec (abfd)->size = core->c_ssize;
core_datasec (abfd)->size = core->c_dsize;
core_regsec (abfd)->size = (sizeof core->c_regs);
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/* Float regs take up end of struct, except c_ucode. */
core_reg2sec (abfd)->size = core_size - (sizeof core->c_ucode) -
(file_ptr)(((struct core *)0)->fp_stuff);
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core_stacksec (abfd)->vma = (USRSTACK - core->c_ssize);
core_datasec (abfd)->vma = N_DATADDR(core->c_aouthdr);
core_regsec (abfd)->vma = -1;
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core_reg2sec (abfd)->vma = -1;
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core_stacksec (abfd)->filepos = core->c_len + core->c_dsize;
core_datasec (abfd)->filepos = core->c_len;
/* In file header: */
core_regsec (abfd)->filepos = (file_ptr)(&((struct core *)0)->c_regs);
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core_reg2sec (abfd)->filepos = (file_ptr)(((struct core *)0)->fp_stuff);
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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;
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core_reg2sec (abfd)->alignment_power = 2;
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abfd->sections = core_stacksec (abfd);
core_stacksec (abfd)->next = core_datasec (abfd);
core_datasec (abfd)->next = core_regsec (abfd);
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core_regsec (abfd)->next = core_reg2sec (abfd);
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abfd->section_count = 4;
return abfd->xvec;
}
char *
sunos4_core_file_failing_command (abfd)
bfd *abfd;
{
return core_hdr (abfd)->c_cmdname;
}
int
sunos4_core_file_failing_signal (abfd)
bfd *abfd;
{
return core_hdr (abfd)->c_signo;
}
boolean
sunos4_core_file_matches_executable_p (core_bfd, exec_bfd)
bfd *core_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), (char*) &exec_hdr (exec_bfd),
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sizeof (struct exec)) == 0) ? true : false;
}
/* byte-swap core structure */
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/* FIXME, this needs more work to swap IN a core struct from raw bytes */
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static void
swapcore (abfd, core)
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bfd *abfd;
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struct core *core;
{
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unsigned char exec_bytes[EXEC_BYTES_SIZE];
core->c_magic = bfd_h_getlong (abfd, (unsigned char *)&core->c_magic);
core->c_len = bfd_h_getlong (abfd, (unsigned char *)&core->c_len );
/* Leave integer registers in target byte order. */
bcopy ((char *)&(core->c_aouthdr), (char *)exec_bytes, EXEC_BYTES_SIZE);
bfd_aout_swap_exec_header_in (abfd, exec_bytes, &core->c_aouthdr);
core->c_signo = bfd_h_getlong (abfd, (unsigned char *)&core->c_signo);
core->c_tsize = bfd_h_getlong (abfd, (unsigned char *)&core->c_tsize);
core->c_dsize = bfd_h_getlong (abfd, (unsigned char *)&core->c_dsize);
core->c_ssize = bfd_h_getlong (abfd, (unsigned char *)&core->c_ssize);
/* Leave FP registers in target byte order. */
/* Leave "c_ucode" unswapped for now, since we can't find it easily. */
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}
/* We use BFD generic archive files. */
#define aout_openr_next_archived_file bfd_generic_openr_next_archived_file
#define aout_generic_stat_arch_elt bfd_generic_stat_arch_elt
#define aout_slurp_armap bfd_slurp_bsd_armap
#define aout_slurp_extended_name_table bfd_true
#define aout_write_armap bsd_write_armap
#define aout_truncate_arname bfd_bsd_truncate_arname
/* We use our own core file format. */
#define aout_core_file_failing_command sunos4_core_file_failing_command
#define aout_core_file_failing_signal sunos4_core_file_failing_signal
#define aout_core_file_matches_executable_p \
sunos4_core_file_matches_executable_p
/* We implement these routines ourselves, rather than using the generic
a.out versions. */
#define aout_write_object_contents sunos4_write_object_contents
bfd_target sunos_big_vec =
{
"a.out-sunos-big", /* name */
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bfd_target_aout_flavour_enum,
true, /* target byte order */
true, /* target headers byte order */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* data */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* hdrs */
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{_bfd_dummy_target, sunos4_object_p,
bfd_generic_archive_p, sunos4_core_file_p},
{bfd_false, sunos4_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, sunos4_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE(aout)
};