422 lines
12 KiB
C
422 lines
12 KiB
C
/* BFD back end for SCO5 core files (U-area and raw sections)
|
|
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
|
|
Free Software Foundation, Inc.
|
|
Written by Jouke Numan <jnuman@hiscom.nl>
|
|
|
|
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
|
|
|
|
#include "bfd.h"
|
|
#include "sysdep.h"
|
|
#include "libbfd.h"
|
|
#include "libaout.h" /* BFD a.out internal data structures */
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/dir.h>
|
|
#include <signal.h>
|
|
|
|
#include <sys/user.h> /* After a.out.h */
|
|
#include <sys/paccess.h>
|
|
#include <sys/region.h>
|
|
|
|
struct sco5_core_struct
|
|
{
|
|
struct user u;
|
|
};
|
|
|
|
/* forward declarations */
|
|
|
|
static asection *make_bfd_asection
|
|
PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
|
|
static struct user *read_uarea PARAMS ((bfd *, int));
|
|
const bfd_target *sco5_core_file_p PARAMS ((bfd *abfd));
|
|
char *sco5_core_file_failing_command PARAMS ((bfd *abfd));
|
|
int sco5_core_file_failing_signal PARAMS ((bfd *abfd));
|
|
bfd_boolean sco5_core_file_matches_executable_p
|
|
PARAMS ((bfd *core_bfd, bfd *exec_bfd));
|
|
static void swap_abort PARAMS ((void));
|
|
|
|
static asection *
|
|
make_bfd_asection (abfd, name, flags, size, vma, filepos)
|
|
bfd *abfd;
|
|
const char *name;
|
|
flagword flags;
|
|
bfd_size_type size;
|
|
bfd_vma vma;
|
|
file_ptr filepos;
|
|
{
|
|
asection *asect;
|
|
|
|
asect = bfd_make_section_anyway (abfd, name);
|
|
if (!asect)
|
|
return NULL;
|
|
asect->flags = flags;
|
|
asect->size = size;
|
|
asect->vma = vma;
|
|
asect->filepos = filepos;
|
|
asect->alignment_power = 2;
|
|
|
|
return asect;
|
|
}
|
|
|
|
static struct user *
|
|
read_uarea(abfd, filepos)
|
|
bfd *abfd;
|
|
int filepos;
|
|
|
|
{
|
|
struct sco5_core_struct *rawptr;
|
|
bfd_size_type amt = sizeof (struct sco5_core_struct);
|
|
|
|
rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt);
|
|
if (rawptr == NULL)
|
|
return NULL;
|
|
|
|
abfd->tdata.sco5_core_data = rawptr;
|
|
|
|
if (bfd_seek (abfd, (file_ptr) filepos, SEEK_SET) != 0
|
|
|| bfd_bread ((void *) &rawptr->u, (bfd_size_type) sizeof rawptr->u,
|
|
abfd) != sizeof rawptr->u)
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
|
|
/* Sanity check perhaps??? */
|
|
if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
if (rawptr->u.u_ssize > 0x1000000)
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
return &rawptr->u;
|
|
}
|
|
|
|
const bfd_target *
|
|
sco5_core_file_p (abfd)
|
|
bfd *abfd;
|
|
{
|
|
int coffset_siz, val, nsecs, cheadoffs;
|
|
int coresize;
|
|
struct user *u;
|
|
struct coreoffsets coffsets;
|
|
struct coresecthead chead;
|
|
char *secname;
|
|
flagword flags;
|
|
|
|
/* Read coreoffsets region at end of core (see core(FP)). */
|
|
|
|
{
|
|
FILE *stream = bfd_cache_lookup (abfd);
|
|
struct stat statbuf;
|
|
|
|
if (stream == NULL)
|
|
return NULL;
|
|
if (fstat (fileno (stream), &statbuf) < 0)
|
|
{
|
|
bfd_set_error (bfd_error_system_call);
|
|
return NULL;
|
|
}
|
|
coresize = statbuf.st_size;
|
|
}
|
|
/* Last long in core is sizeof struct coreoffsets, read it */
|
|
if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz),
|
|
SEEK_SET) != 0)
|
|
|| bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz,
|
|
abfd) != sizeof coffset_siz)
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
|
|
/* Use it to seek start of coreoffsets region, read it and determine
|
|
validity */
|
|
if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0)
|
|
|| (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd)
|
|
!= sizeof coffsets)
|
|
|| ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION)))
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
return NULL;
|
|
}
|
|
|
|
if (coffsets.u_info == 1)
|
|
{
|
|
/* Old version, no section heads, read info from user struct */
|
|
|
|
u = read_uarea (abfd, coffsets.u_user);
|
|
if (! u)
|
|
goto fail;
|
|
|
|
if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS,
|
|
(bfd_size_type) coffsets.u_usize,
|
|
0 - (bfd_vma) u->u_ar0,
|
|
(file_ptr) coffsets.u_user))
|
|
goto fail;
|
|
|
|
if (!make_bfd_asection (abfd, ".data",
|
|
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
|
|
((bfd_size_type) u->u_exdata.ux_dsize
|
|
+ u->u_exdata.ux_bsize),
|
|
(bfd_vma) u->u_exdata.ux_datorg,
|
|
(file_ptr) coffsets.u_data))
|
|
goto fail;
|
|
|
|
if (!make_bfd_asection (abfd, ".stack",
|
|
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
|
|
(bfd_size_type) u->u_ssize * NBPC,
|
|
(bfd_vma) u->u_sub,
|
|
(file_ptr) coffsets.u_stack))
|
|
goto fail;
|
|
|
|
return abfd->xvec; /* Done for version 1 */
|
|
}
|
|
|
|
/* Immediately before coreoffsets region is a long with offset in core
|
|
to first coresecthead (CORES_OFFSETS), the long before this is the
|
|
number of section heads in the list. Read both longs and read the
|
|
coresecthead and check its validity */
|
|
|
|
if ((bfd_seek (abfd,
|
|
(file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz),
|
|
SEEK_SET) != 0)
|
|
|| (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd)
|
|
!= sizeof nsecs)
|
|
|| (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs,
|
|
abfd) != sizeof cheadoffs)
|
|
|| (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0)
|
|
|| (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd)
|
|
!= sizeof chead)
|
|
|| (chead.cs_stype != CORES_OFFSETS)
|
|
|| (chead.cs_x.csx_magic != COREMAGIC_NUMBER))
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
goto fail;
|
|
}
|
|
|
|
/* OK, we believe you. You're a core file (sure, sure). */
|
|
|
|
/* Now loop over all regions and map them */
|
|
nsecs--; /* We've seen CORES_OFFSETS already */
|
|
for (; nsecs; nsecs--)
|
|
{
|
|
if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0)
|
|
|| (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd)
|
|
!= sizeof chead))
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
goto fail;
|
|
}
|
|
|
|
switch (chead.cs_stype)
|
|
{
|
|
case CORES_MAGIC: /* Core header, check magic */
|
|
if (chead.cs_x.csx_magic != COREMAGIC_NUMBER)
|
|
{
|
|
bfd_set_error (bfd_error_wrong_format);
|
|
goto fail;
|
|
}
|
|
secname = NULL;
|
|
nsecs++; /* MAGIC not in section cnt!*/
|
|
break;
|
|
case CORES_UAREA: /* U-area, read in tdata */
|
|
u = read_uarea (abfd, chead.cs_sseek);
|
|
if (! u)
|
|
goto fail;
|
|
|
|
/* 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. */
|
|
|
|
chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0;
|
|
|
|
secname = ".reg";
|
|
flags = SEC_HAS_CONTENTS;
|
|
|
|
break;
|
|
case CORES_PREGION: /* A program region, map it */
|
|
switch (chead.cs_x.csx_preg.csxp_rtyp)
|
|
{
|
|
case PT_DATA:
|
|
secname = ".data"; /* Data region. */
|
|
break;
|
|
case PT_STACK:
|
|
secname = ".stack"; /* Stack region. */
|
|
break;
|
|
case PT_SHMEM:
|
|
secname = ".shmem"; /* Shared memory */
|
|
break;
|
|
case PT_LIBDAT:
|
|
secname = ".libdat"; /* Shared library data */
|
|
break;
|
|
case PT_V86:
|
|
secname = ".virt86"; /* Virtual 8086 mode */
|
|
break;
|
|
case PT_SHFIL:
|
|
secname = ".mmfile"; /* Memory mapped file */
|
|
break;
|
|
case PT_XDATA0:
|
|
secname = ".Xdat0"; /* XENIX data region, virtual 0 */
|
|
break;
|
|
default:
|
|
secname = "";
|
|
}
|
|
flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
|
|
break;
|
|
case CORES_PROC: /* struct proc */
|
|
case CORES_ITIMER: /* interval timers */
|
|
case CORES_SCOUTSNAME: /* struct scoutsname */
|
|
secname = NULL; /* Ignore these */
|
|
break;
|
|
default:
|
|
(*_bfd_error_handler) ("Unhandled SCO core file section type %d\n",
|
|
chead.cs_stype);
|
|
continue;
|
|
}
|
|
|
|
if (secname
|
|
&& !make_bfd_asection (abfd, secname, flags,
|
|
(bfd_size_type) chead.cs_vsize,
|
|
(bfd_vma) chead.cs_vaddr,
|
|
(file_ptr) chead.cs_sseek))
|
|
goto fail;
|
|
|
|
}
|
|
|
|
return abfd->xvec;
|
|
|
|
fail:
|
|
if (abfd->tdata.any)
|
|
{
|
|
bfd_release (abfd, abfd->tdata.any);
|
|
abfd->tdata.any = NULL;
|
|
}
|
|
bfd_section_list_clear (abfd);
|
|
return NULL;
|
|
}
|
|
|
|
char *
|
|
sco5_core_file_failing_command (abfd)
|
|
bfd *abfd;
|
|
{
|
|
char *com = abfd->tdata.sco5_core_data->u.u_comm;
|
|
if (*com)
|
|
return com;
|
|
else
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
sco5_core_file_failing_signal (ignore_abfd)
|
|
bfd *ignore_abfd;
|
|
{
|
|
return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0)
|
|
? ignore_abfd->tdata.sco5_core_data->u.u_sysabort
|
|
: -1);
|
|
}
|
|
|
|
bfd_boolean
|
|
sco5_core_file_matches_executable_p (core_bfd, exec_bfd)
|
|
bfd *core_bfd ATTRIBUTE_UNUSED;
|
|
bfd *exec_bfd ATTRIBUTE_UNUSED;
|
|
{
|
|
return TRUE; /* FIXME, We have no way of telling at this point */
|
|
}
|
|
|
|
/* If somebody calls any byte-swapping routines, shoot them. */
|
|
static void
|
|
swap_abort ()
|
|
{
|
|
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 sco5_core_vec =
|
|
{
|
|
"sco5-core",
|
|
bfd_target_unknown_flavour,
|
|
BFD_ENDIAN_LITTLE, /* target byte order */
|
|
BFD_ENDIAN_LITTLE, /* 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_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 */
|
|
sco5_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 (sco5),
|
|
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,
|
|
|
|
(PTR) 0 /* backend_data */
|
|
};
|