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/* BFD back end for Lynx core files
Copyright (C) 1993-2018 Free Software Foundation, Inc.
Written by Stu Grossman 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"
#ifdef LYNX_CORE
#include <sys/conf.h>
#include <sys/kernel.h>
/* sys/kernel.h should define this, but doesn't always, sigh. */
#ifndef __LYNXOS
#define __LYNXOS
#endif
#include <sys/mem.h>
#include <sys/signal.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/itimer.h>
#include <sys/file.h>
#include <sys/proc.h>
/* These are stored in the bfd's tdata */
struct lynx_core_struct
{
int sig;
char cmd[PNMLEN + 1];
};
#define core_hdr(bfd) ((bfd)->tdata.lynx_core_data)
#define core_signal(bfd) (core_hdr(bfd)->sig)
#define core_command(bfd) (core_hdr(bfd)->cmd)
#define lynx_core_file_matches_executable_p generic_core_file_matches_executable_p
#define lynx_core_file_pid _bfd_nocore_core_file_pid
/* Handle Lynx core dump file. */
static asection *
make_bfd_asection (bfd *abfd,
const char *name,
flagword flags,
bfd_size_type size,
bfd_vma vma,
file_ptr filepos)
{
asection *asect;
char *newname;
newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
if (!newname)
return NULL;
strcpy (newname, name);
asect = bfd_make_section_with_flags (abfd, newname, flags);
if (!asect)
return NULL;
asect->size = size;
asect->vma = vma;
asect->filepos = filepos;
asect->alignment_power = 2;
return asect;
}
const bfd_target *
lynx_core_file_p (bfd *abfd)
{
int secnum;
struct pssentry pss;
bfd_size_type tcontext_size;
core_st_t *threadp;
int pagesize;
asection *newsect;
bfd_size_type amt;
pagesize = getpagesize (); /* Serious cross-target issue here... This
really needs to come from a system-specific
header file. */
/* Get the pss entry from the core file */
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
return NULL;
amt = sizeof pss;
if (bfd_bread ((void *) &pss, amt, abfd) != amt)
{
/* Too small to be a core file */
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
amt = sizeof (struct lynx_core_struct);
core_hdr (abfd) = (struct lynx_core_struct *) bfd_zalloc (abfd, amt);
if (!core_hdr (abfd))
return NULL;
strncpy (core_command (abfd), pss.pname, PNMLEN + 1);
/* Compute the size of the thread contexts */
tcontext_size = pss.threadcnt * sizeof (core_st_t);
/* Allocate space for the thread contexts */
threadp = (core_st_t *) bfd_alloc (abfd, tcontext_size);
if (!threadp)
goto fail;
/* Save thread contexts */
if (bfd_seek (abfd, (file_ptr) pagesize, SEEK_SET) != 0)
goto fail;
if (bfd_bread ((void *) threadp, tcontext_size, abfd) != tcontext_size)
{
/* Probably too small to be a core file */
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
goto fail;
}
core_signal (abfd) = threadp->currsig;
newsect = make_bfd_asection (abfd, ".stack",
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
pss.ssize,
pss.slimit,
pagesize + tcontext_size);
if (!newsect)
goto fail;
newsect = make_bfd_asection (abfd, ".data",
SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
pss.data_len + pss.bss_len,
pss.data_start,
pagesize + tcontext_size + pss.ssize
#if defined (SPARC) || defined (__SPARC__)
/* SPARC Lynx seems to start dumping
the .data section at a page
boundary. It's OK to check a
#define like SPARC here because this
file can only be compiled on a Lynx
host. */
+ pss.data_start % pagesize
#endif
);
if (!newsect)
goto fail;
/* And, now for the .reg/XXX pseudo sections. Each thread has it's own
.reg/XXX section, where XXX is the thread id (without leading zeros). The
currently running thread (at the time of the core dump) also has an alias
called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as
opposed to `.regXXX' because GDB expects that .reg2 will be the floating-
point registers. */
newsect = make_bfd_asection (abfd, ".reg",
SEC_HAS_CONTENTS,
sizeof (core_st_t),
0,
pagesize);
if (!newsect)
goto fail;
for (secnum = 0; secnum < pss.threadcnt; secnum++)
{
char secname[100];
sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid));
newsect = make_bfd_asection (abfd, secname,
SEC_HAS_CONTENTS,
sizeof (core_st_t),
0,
pagesize + secnum * sizeof (core_st_t));
if (!newsect)
goto fail;
}
return abfd->xvec;
fail:
bfd_release (abfd, core_hdr (abfd));
core_hdr (abfd) = NULL;
bfd_section_list_clear (abfd);
return NULL;
}
char *
lynx_core_file_failing_command (bfd *abfd)
{
return core_command (abfd);
}
int
lynx_core_file_failing_signal (bfd *abfd)
{
return core_signal (abfd);
}
#endif /* LYNX_CORE */
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