234 lines
7.3 KiB
C
234 lines
7.3 KiB
C
/* BFD backend for core files which use the ptrace_user structure
|
||
Copyright 1993, 1994 Free Software Foundation, Inc.
|
||
The structure of this file is based on trad-core.c written by John Gilmore
|
||
of Cygnus Support.
|
||
Modified to work with the ptrace_user structure by Kevin A. Buettner.
|
||
(Longterm it may be better to merge this file with trad-core.c)
|
||
|
||
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#ifdef PTRACE_CORE
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
|
||
#include <stdio.h>
|
||
#include <sys/types.h>
|
||
#include <sys/param.h>
|
||
#include <sys/dir.h>
|
||
#include <signal.h>
|
||
#include <errno.h>
|
||
#include <unistd.h>
|
||
#include <sys/ptrace.h>
|
||
|
||
|
||
struct trad_core_struct
|
||
{
|
||
asection *data_section;
|
||
asection *stack_section;
|
||
asection *reg_section;
|
||
struct ptrace_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 */
|
||
|
||
const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd));
|
||
char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
|
||
int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
|
||
boolean ptrace_unix_core_file_matches_executable_p
|
||
PARAMS ((bfd *core_bfd, bfd *exec_bfd));
|
||
|
||
/* ARGSUSED */
|
||
const bfd_target *
|
||
ptrace_unix_core_file_p (abfd)
|
||
bfd *abfd;
|
||
|
||
{
|
||
int val;
|
||
struct ptrace_user u;
|
||
struct trad_core_struct *rawptr;
|
||
|
||
val = bfd_read ((void *)&u, 1, sizeof u, abfd);
|
||
if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC
|
||
|| u.pt_rev != _BCS_PTRACE_REV)
|
||
{
|
||
/* Too small to be a core file */
|
||
bfd_set_error (bfd_error_wrong_format);
|
||
return 0;
|
||
}
|
||
|
||
/* 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. */
|
||
rawptr = (struct trad_core_struct *)
|
||
bfd_zalloc (abfd, sizeof (struct trad_core_struct));
|
||
|
||
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. This is raunchy, but bfd_close wants to free
|
||
them separately. */
|
||
|
||
core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
|
||
if (core_stacksec (abfd) == NULL)
|
||
return NULL;
|
||
core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
|
||
if (core_datasec (abfd) == NULL)
|
||
return NULL;
|
||
core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
|
||
if (core_regsec (abfd) == NULL)
|
||
return NULL;
|
||
|
||
core_stacksec (abfd)->name = ".stack";
|
||
core_datasec (abfd)->name = ".data";
|
||
core_regsec (abfd)->name = ".reg";
|
||
|
||
/* FIXME: Need to worry about shared memory, library data, and library
|
||
text. I don't think that any of these things are supported on the
|
||
system on which I am developing this for though. */
|
||
|
||
|
||
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_HAS_CONTENTS;
|
||
|
||
core_datasec (abfd)->_raw_size = u.pt_dsize;
|
||
core_stacksec (abfd)->_raw_size = u.pt_ssize;
|
||
core_regsec (abfd)->_raw_size = sizeof(u);
|
||
|
||
core_datasec (abfd)->vma = u.pt_o_data_start;
|
||
core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
|
||
core_regsec (abfd)->vma = 0 - sizeof(u); /* see trad-core.c */
|
||
|
||
core_datasec (abfd)->filepos = (int) u.pt_dataptr;
|
||
core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
|
||
core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
|
||
|
||
/* Align to word at least */
|
||
core_stacksec (abfd)->alignment_power = 2;
|
||
core_datasec (abfd)->alignment_power = 2;
|
||
core_regsec (abfd)->alignment_power = 2;
|
||
|
||
abfd->sections = core_stacksec (abfd);
|
||
core_stacksec (abfd)->next = core_datasec (abfd);
|
||
core_datasec (abfd)->next = core_regsec (abfd);
|
||
abfd->section_count = 3;
|
||
|
||
return abfd->xvec;
|
||
}
|
||
|
||
char *
|
||
ptrace_unix_core_file_failing_command (abfd)
|
||
bfd *abfd;
|
||
{
|
||
char *com = abfd->tdata.trad_core_data->u.pt_comm;
|
||
if (*com)
|
||
return com;
|
||
else
|
||
return 0;
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
int
|
||
ptrace_unix_core_file_failing_signal (abfd)
|
||
bfd *abfd;
|
||
{
|
||
return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
|
||
}
|
||
|
||
/* ARGSUSED */
|
||
boolean
|
||
ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
|
||
bfd *core_bfd, *exec_bfd;
|
||
{
|
||
/* FIXME: Use pt_timdat field of the ptrace_user structure to match
|
||
the date of the executable */
|
||
return true;
|
||
}
|
||
|
||
/* 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 )
|
||
|
||
const bfd_target ptrace_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 */
|
||
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 */
|
||
ptrace_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 (ptrace_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),
|
||
|
||
(PTR) 0 /* backend_data */
|
||
};
|
||
|
||
#endif /* PTRACE_CORE */
|