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/* BFD back-end for CISCO crash dumps.
Copyright 1994 Free Software Foundation, Inc.
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. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
/* core_file_failing_signal returns a host signal (this probably should
be fixed). */
#include <signal.h>
#define CRASH_INFO (0xffc)
#define CRASH_MAGIC 0xdead1234
typedef enum {
CRASH_REASON_NOTCRASHED = 0,
CRASH_REASON_EXCEPTION = 1,
CRASH_REASON_CORRUPT = 2,
} crashreason;
struct crashinfo_external
{
char magic[4]; /* Magic number */
char version[4]; /* Version number */
char reason[4]; /* Crash reason */
char cpu_vector[4]; /* CPU vector for exceptions */
char registers[4]; /* Pointer to saved registers */
char rambase[4]; /* Base of RAM (not in V1 crash info) */
};
struct cisco_core_struct
{
int sig;
};
static bfd_target *
cisco_core_file_p (abfd)
bfd *abfd;
{
char buf[4];
unsigned int crashinfo_offset;
struct crashinfo_external crashinfo;
int nread;
unsigned int rambase;
sec_ptr asect;
struct stat statbuf;
if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
return NULL;
nread = bfd_read (buf, 1, 4, abfd);
if (nread != 4)
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
crashinfo_offset = bfd_get_32 (abfd, buf);
if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
return NULL;
nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
if (nread != sizeof (crashinfo))
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (bfd_stat (abfd, &statbuf) < 0)
{
bfd_set_error (bfd_error_system_call);
return NULL;
}
if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
switch (bfd_get_32 (abfd, crashinfo.version))
{
case 0:
bfd_set_error (bfd_error_wrong_format);
return NULL;
case 1:
rambase = 0;
break;
default:
case 2:
rambase = bfd_get_32 (abfd, crashinfo.rambase);
break;
}
/* OK, we believe you. You're a core file. */
abfd->tdata.cisco_core_data =
((struct cisco_core_struct *)
bfd_zmalloc (sizeof (struct cisco_core_struct)));
if (abfd->tdata.cisco_core_data == NULL)
{
bfd_set_error (bfd_error_no_memory);
return NULL;
}
switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
{
case CRASH_REASON_NOTCRASHED:
/* Crash file probably came from write core. */
abfd->tdata.cisco_core_data->sig = 0;
break;
case CRASH_REASON_CORRUPT:
/* The crash context area was corrupt -- proceed with caution.
We have no way of passing this information back to the caller. */
abfd->tdata.cisco_core_data->sig = 0;
break;
case CRASH_REASON_EXCEPTION:
/* Crash occured due to CPU exception. */
/* This is 68k-specific; for MIPS we'll need to interpret
cpu_vector differently based on the target configuration
(since CISCO core files don't seem to have the processor
encoded in them). */
switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
{
/* bus error */
case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
/* address error */
case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
/* illegal instruction */
case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break;
/* zero divide */
case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* chk instruction */
case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* trapv instruction */
case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* privilege violation */
case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
/* trace trap */
case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
/* line 1010 emulator */
case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break;
/* line 1111 emulator */
case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break;
/* Coprocessor protocol violation. Using a standard MMU or FPU
this cannot be triggered by software. Call it a SIGBUS. */
case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break;
/* interrupt */
case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break;
/* breakpoint */
case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
/* floating point err */
case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* floating point err */
case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* zero divide */
case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* underflow */
case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* operand error */
case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* overflow */
case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
/* NAN */
case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
default:
/* "software generated"*/
abfd->tdata.cisco_core_data->sig = SIGEMT;
}
break;
default:
/* Unknown crash reason. */
abfd->tdata.cisco_core_data->sig = 0;
break;
}
abfd->sections = NULL;
abfd->section_count = 0;
asect = (asection *) bfd_zmalloc (sizeof (asection));
if (asect == NULL)
{
bfd_set_error (bfd_error_no_memory);
goto error_return;
}
asect->name = ".reg";
asect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
/* This can be bigger than the real size. Set it to the size of the whole
core file. */
asect->_raw_size = statbuf.st_size;
asect->vma = 0;
asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase;
asect->next = abfd->sections;
abfd->sections = asect;
++abfd->section_count;
/* There is only one section containing data from the target system's RAM.
We call it .data. */
asect = (asection *) bfd_zmalloc (sizeof (asection));
if (asect == NULL)
{
bfd_set_error (bfd_error_no_memory);
goto error_return;
}
asect->name = ".data";
asect->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
/* The size of memory is the size of the core file itself. */
asect->_raw_size = statbuf.st_size;
asect->vma = rambase;
asect->filepos = 0;
asect->next = abfd->sections;
abfd->sections = asect;
++abfd->section_count;
return abfd->xvec;
error_return:
{
sec_ptr nextsect;
for (asect = abfd->sections; asect != NULL;)
{
nextsect = asect->next;
free (asect);
asect = nextsect;
}
free (abfd->tdata.cisco_core_data);
return NULL;
}
}
char *
cisco_core_file_failing_command (abfd)
bfd *abfd;
{
return NULL;
}
int
cisco_core_file_failing_signal (abfd)
bfd *abfd;
{
return abfd->tdata.cisco_core_data->sig;
}
boolean
cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
bfd *core_bfd;
bfd *exec_bfd;
{
return true;
}
bfd_target cisco_core_vec =
{
"trad-core",
bfd_target_unknown_flavour,
true, /* target byte order */
true, /* target headers byte order */
(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 */
0, /* symbol prefix */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
3, /* minimum 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_check_format */
_bfd_dummy_target, /* unknown format */
_bfd_dummy_target, /* object file */
_bfd_dummy_target, /* archive */
cisco_core_file_p /* a core file */
},
{ /* bfd_set_format */
bfd_false, bfd_false,
bfd_false, bfd_false
},
{ /* bfd_write_contents */
bfd_false, bfd_false,
bfd_false, bfd_false
},
BFD_JUMP_TABLE_GENERIC (_bfd_generic),
BFD_JUMP_TABLE_COPY (_bfd_generic),
BFD_JUMP_TABLE_CORE (cisco),
BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
BFD_JUMP_TABLE_WRITE (_bfd_generic),
BFD_JUMP_TABLE_LINK (_bfd_nolink),
(PTR) 0 /* backend_data */
};
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