mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 21:44:19 +08:00
318 lines
9.5 KiB
C
318 lines
9.5 KiB
C
/* BFD back end for traditional Unix core files (U-area and raw sections)
|
||
Copyright (C) 1988-2014 Free Software Foundation, Inc.
|
||
Written by John Gilmore of 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
|
||
MA 02110-1301, USA. */
|
||
|
||
#include "sysdep.h"
|
||
#include "bfd.h"
|
||
#include "libbfd.h"
|
||
#include "libaout.h" /* BFD a.out internal data structures */
|
||
|
||
#include <sys/param.h>
|
||
#ifdef HAVE_DIRENT_H
|
||
# include <dirent.h>
|
||
#else
|
||
# ifdef HAVE_SYS_NDIR_H
|
||
# include <sys/ndir.h>
|
||
# endif
|
||
# ifdef HAVE_SYS_DIR_H
|
||
# include <sys/dir.h>
|
||
# endif
|
||
# ifdef HAVE_NDIR_H
|
||
# include <ndir.h>
|
||
# endif
|
||
#endif
|
||
#include <signal.h>
|
||
|
||
#include <sys/user.h> /* After a.out.h */
|
||
|
||
#ifdef TRAD_HEADER
|
||
#include TRAD_HEADER
|
||
#endif
|
||
|
||
#ifndef NBPG
|
||
# define NBPG getpagesize()
|
||
#endif
|
||
|
||
struct trad_core_struct
|
||
{
|
||
asection *data_section;
|
||
asection *stack_section;
|
||
asection *reg_section;
|
||
struct user u;
|
||
};
|
||
|
||
#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
|
||
#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
|
||
#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
|
||
#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
|
||
|
||
/* forward declarations */
|
||
|
||
#define trad_unix_core_file_matches_executable_p generic_core_file_matches_executable_p
|
||
#define trad_unix_core_file_pid _bfd_nocore_core_file_pid
|
||
|
||
|
||
/* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
|
||
|
||
static const bfd_target *
|
||
trad_unix_core_file_p (bfd *abfd)
|
||
{
|
||
int val;
|
||
struct user u;
|
||
struct trad_core_struct *rawptr;
|
||
bfd_size_type amt;
|
||
flagword flags;
|
||
|
||
#ifdef TRAD_CORE_USER_OFFSET
|
||
/* If defined, this macro is the file position of the user struct. */
|
||
if (bfd_seek (abfd, (file_ptr) TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
|
||
return 0;
|
||
#endif
|
||
|
||
val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
|
||
if (val != sizeof u)
|
||
{
|
||
/* Too small to be a core file */
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
|
||
/* Sanity check perhaps??? */
|
||
if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
if (u.u_ssize > 0x1000000)
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
|
||
/* Check that the size claimed is no greater than the file size. */
|
||
{
|
||
struct stat statbuf;
|
||
|
||
if (bfd_stat (abfd, &statbuf) < 0)
|
||
return 0;
|
||
|
||
if ((ufile_ptr) NBPG * (UPAGES + u.u_dsize
|
||
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
|
||
- u.u_tsize
|
||
#endif
|
||
+ u.u_ssize)
|
||
> (ufile_ptr) statbuf.st_size)
|
||
{
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
#ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
|
||
if (((ufile_ptr) NBPG * (UPAGES + u.u_dsize + u.u_ssize)
|
||
#ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
|
||
/* Some systems write the file too big. */
|
||
+ TRAD_CORE_EXTRA_SIZE_ALLOWED
|
||
#endif
|
||
)
|
||
< (ufile_ptr) statbuf.st_size)
|
||
{
|
||
/* The file is too big. Maybe it's not a core file
|
||
or we otherwise have bad values for u_dsize and u_ssize). */
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* OK, we believe you. You're a core file (sure, sure). */
|
||
|
||
/* Allocate both the upage and the struct core_data at once, so
|
||
a single free() will free them both. */
|
||
amt = sizeof (struct trad_core_struct);
|
||
rawptr = (struct trad_core_struct *) bfd_zmalloc (amt);
|
||
if (rawptr == NULL)
|
||
return 0;
|
||
|
||
abfd->tdata.trad_core_data = rawptr;
|
||
|
||
rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
|
||
|
||
/* Create the sections. */
|
||
|
||
flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
|
||
core_stacksec(abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack",
|
||
flags);
|
||
if (core_stacksec (abfd) == NULL)
|
||
goto fail;
|
||
core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data",
|
||
flags);
|
||
if (core_datasec (abfd) == NULL)
|
||
goto fail;
|
||
core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
|
||
SEC_HAS_CONTENTS);
|
||
if (core_regsec (abfd) == NULL)
|
||
goto fail;
|
||
|
||
core_datasec (abfd)->size = NBPG * u.u_dsize
|
||
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
|
||
- NBPG * u.u_tsize
|
||
#endif
|
||
;
|
||
core_stacksec (abfd)->size = NBPG * u.u_ssize;
|
||
core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */
|
||
|
||
/* What a hack... we'd like to steal it from the exec file,
|
||
since the upage does not seem to provide it. FIXME. */
|
||
#ifdef HOST_DATA_START_ADDR
|
||
core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
|
||
#else
|
||
core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
|
||
#endif
|
||
|
||
#ifdef HOST_STACK_START_ADDR
|
||
core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
|
||
#else
|
||
core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
|
||
#endif
|
||
|
||
/* This is tricky. As the "register section", we give them the entire
|
||
upage and stack. u.u_ar0 points to where "register 0" is stored.
|
||
There are two tricks with this, though. One is that the rest of the
|
||
registers might be at positive or negative (or both) displacements
|
||
from *u_ar0. The other is that u_ar0 is sometimes an absolute address
|
||
in kernel memory, and on other systems it is an offset from the beginning
|
||
of the `struct user'.
|
||
|
||
As a practical matter, we don't know where the registers actually are,
|
||
so we have to pass the whole area to GDB. We encode the value of u_ar0
|
||
by setting the .regs section up so that its virtual memory address
|
||
0 is at the place pointed to by u_ar0 (by setting the vma of the start
|
||
of the section to -u_ar0). GDB uses this info to locate the regs,
|
||
using minor trickery to get around the offset-or-absolute-addr problem. */
|
||
core_regsec (abfd)->vma = - (bfd_vma) (unsigned long) u.u_ar0;
|
||
|
||
core_datasec (abfd)->filepos = NBPG * UPAGES;
|
||
core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
|
||
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
|
||
- NBPG * u.u_tsize
|
||
#endif
|
||
;
|
||
core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
|
||
|
||
/* Align to word at least */
|
||
core_stacksec (abfd)->alignment_power = 2;
|
||
core_datasec (abfd)->alignment_power = 2;
|
||
core_regsec (abfd)->alignment_power = 2;
|
||
|
||
return abfd->xvec;
|
||
|
||
fail:
|
||
bfd_release (abfd, abfd->tdata.any);
|
||
abfd->tdata.any = NULL;
|
||
bfd_section_list_clear (abfd);
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
trad_unix_core_file_failing_command (bfd *abfd)
|
||
{
|
||
#ifndef NO_CORE_COMMAND
|
||
char *com = abfd->tdata.trad_core_data->u.u_comm;
|
||
if (*com)
|
||
return com;
|
||
else
|
||
#endif
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
trad_unix_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED)
|
||
{
|
||
#ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
|
||
return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
|
||
#else
|
||
return -1; /* FIXME, where is it? */
|
||
#endif
|
||
}
|
||
|
||
/* If somebody calls any byte-swapping routines, shoot them. */
|
||
static void
|
||
swap_abort (void)
|
||
{
|
||
abort (); /* This way doesn't require any declaration for ANSI to fuck up */
|
||
}
|
||
|
||
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
|
||
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
|
||
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
|
||
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
|
||
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
|
||
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
|
||
|
||
const bfd_target trad_core_vec =
|
||
{
|
||
"trad-core",
|
||
bfd_target_unknown_flavour,
|
||
BFD_ENDIAN_UNKNOWN, /* target byte order */
|
||
BFD_ENDIAN_UNKNOWN, /* 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 */
|
||
0, /* match priority. */
|
||
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
|
||
NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
|
||
NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
|
||
NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
|
||
NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
|
||
NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
|
||
|
||
{ /* bfd_check_format */
|
||
_bfd_dummy_target, /* unknown format */
|
||
_bfd_dummy_target, /* object file */
|
||
_bfd_dummy_target, /* archive */
|
||
trad_unix_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 (trad_unix),
|
||
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),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
NULL,
|
||
|
||
NULL /* backend_data */
|
||
};
|