binutils-gdb/bfd/cisco-core.c

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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"
#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)
{
/* Maybe the file is too small (FIXME: what about other errors). */
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))
{
/* Maybe the file is too small (FIXME: what about other errors). */
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 (abfd, 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.
FIXME: convert cpu_vector to a signal number. */
abfd->tdata.cisco_core_data->sig = 0;
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);
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;
}
/* No archive file support via this BFD */
#define cisco_openr_next_archived_file bfd_generic_openr_next_archived_file
#define cisco_generic_stat_arch_elt bfd_generic_stat_arch_elt
#define cisco_slurp_armap bfd_false
#define cisco_slurp_extended_name_table bfd_true
#define cisco_write_armap (boolean (*) PARAMS \
((bfd *arch, unsigned int elength, struct orl *map, \
unsigned int orl_count, int stridx))) bfd_false
#define cisco_truncate_arname bfd_dont_truncate_arname
#define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
#define cisco_close_and_cleanup bfd_generic_close_and_cleanup
#define cisco_set_section_contents (boolean (*) PARAMS \
((bfd *abfd, asection *section, PTR data, file_ptr offset, \
bfd_size_type count))) bfd_generic_set_section_contents
#define cisco_get_section_contents bfd_generic_get_section_contents
#define cisco_new_section_hook (boolean (*) PARAMS \
((bfd *, sec_ptr))) bfd_true
#define cisco_get_symtab_upper_bound bfd_0u
#define cisco_get_symtab (unsigned int (*) PARAMS \
((bfd *, struct symbol_cache_entry **))) bfd_0u
#define cisco_get_reloc_upper_bound (unsigned int (*) PARAMS \
((bfd *, sec_ptr))) bfd_0u
#define cisco_canonicalize_reloc (unsigned int (*) PARAMS \
((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
#define cisco_make_empty_symbol (struct symbol_cache_entry * \
(*) PARAMS ((bfd *))) bfd_false
#define cisco_print_symbol (void (*) PARAMS \
((bfd *, PTR, struct symbol_cache_entry *, \
bfd_print_symbol_type))) bfd_false
#define cisco_get_symbol_info (void (*) PARAMS \
((bfd *, struct symbol_cache_entry *, \
symbol_info *))) bfd_false
#define cisco_get_lineno (alent * (*) PARAMS \
((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
#define cisco_set_arch_mach (boolean (*) PARAMS \
((bfd *, enum bfd_architecture, unsigned long))) bfd_false
#define cisco_find_nearest_line (boolean (*) PARAMS \
((bfd *abfd, struct sec *section, \
struct symbol_cache_entry **symbols,bfd_vma offset, \
CONST char **file, CONST char **func, unsigned int *line))) bfd_false
#define cisco_sizeof_headers (int (*) PARAMS \
((bfd *, boolean))) bfd_0
#define cisco_bfd_debug_info_start bfd_void
#define cisco_bfd_debug_info_end bfd_void
#define cisco_bfd_debug_info_accumulate (void (*) PARAMS \
((bfd *, struct sec *))) bfd_void
#define cisco_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
#define cisco_bfd_relax_section bfd_generic_relax_section
#define cisco_bfd_reloc_type_lookup \
((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
#define cisco_bfd_make_debug_symbol \
((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
#define cisco_bfd_link_hash_table_create \
((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
#define cisco_bfd_link_add_symbols \
((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
#define cisco_bfd_final_link \
((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
#define cisco_bfd_copy_private_section_data \
((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_false)
#define cisco_bfd_copy_private_bfd_data \
((boolean (*) PARAMS ((bfd *, bfd *))) bfd_false)
#define cisco_bfd_is_local_label \
((boolean (*) PARAMS ((bfd *, asection *))) bfd_false)
/* If somebody calls any byte-swapping routines, shoot them. */
void
swap_abort()
{
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
#define NO_SIGNED_GET \
((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
bfd_target trad_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 */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit 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
},
JUMP_TABLE(cisco),
(PTR) 0 /* backend_data */
};