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[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [bfd/] [lynx-core.c] - Blame information for rev 1771

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1 104 markom
/* BFD back end for Lynx core files
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   Copyright 1993 Free Software Foundation, Inc.
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   Written by Stu Grossman of Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#ifdef LYNX_CORE
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#include <sys/conf.h>
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#include <sys/kernel.h>
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/* sys/kernel.h should define this, but doesn't always, sigh. */
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#ifndef __LYNXOS
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#define __LYNXOS
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#endif
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#include <sys/mem.h>
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#include <sys/signal.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/itimer.h>
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#include <sys/file.h>
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#include <sys/proc.h>
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/* These are stored in the bfd's tdata */
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struct lynx_core_struct
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{
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  int sig;
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  char cmd[PNMLEN + 1];
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};
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#define core_hdr(bfd) ((bfd)->tdata.lynx_core_data)
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#define core_signal(bfd) (core_hdr(bfd)->sig)
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#define core_command(bfd) (core_hdr(bfd)->cmd)
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/* Handle Lynx core dump file.  */
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static asection *
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make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
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     bfd *abfd;
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     CONST char *name;
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     flagword flags;
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     bfd_size_type _raw_size;
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     bfd_vma vma;
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     file_ptr filepos;
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{
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  asection *asect;
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  char *newname;
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  newname = bfd_alloc (abfd, strlen (name) + 1);
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  if (!newname)
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    return NULL;
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  strcpy (newname, name);
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  asect = bfd_make_section (abfd, newname);
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  if (!asect)
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    return NULL;
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  asect->flags = flags;
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  asect->_raw_size = _raw_size;
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  asect->vma = vma;
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  asect->filepos = filepos;
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  asect->alignment_power = 2;
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  return asect;
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}
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/* ARGSUSED */
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const bfd_target *
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lynx_core_file_p (abfd)
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     bfd *abfd;
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{
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  int val;
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  int secnum;
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  struct pssentry pss;
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  size_t tcontext_size;
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  core_st_t *threadp;
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  int pagesize;
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  asection *newsect;
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  pagesize = getpagesize ();    /* Serious cross-target issue here...  This
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                                   really needs to come from a system-specific
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                                   header file.  */
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  /* Get the pss entry from the core file */
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  if (bfd_seek (abfd, 0, SEEK_SET) != 0)
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    return NULL;
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  val = bfd_read ((void *)&pss, 1, sizeof pss, abfd);
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  if (val != sizeof pss)
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    {
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      /* Too small to be a core file */
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      if (bfd_get_error () != bfd_error_system_call)
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        bfd_set_error (bfd_error_wrong_format);
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      return NULL;
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    }
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  core_hdr (abfd) = (struct lynx_core_struct *)
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    bfd_zalloc (abfd, sizeof (struct lynx_core_struct));
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  if (!core_hdr (abfd))
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    return NULL;
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  strncpy (core_command (abfd), pss.pname, PNMLEN + 1);
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  /* Compute the size of the thread contexts */
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  tcontext_size = pss.threadcnt * sizeof (core_st_t);
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  /* Allocate space for the thread contexts */
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  threadp = (core_st_t *)bfd_alloc (abfd, tcontext_size);
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  if (!threadp)
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    return NULL;
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  /* Save thread contexts */
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  if (bfd_seek (abfd, pagesize, SEEK_SET) != 0)
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    return NULL;
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  val = bfd_read ((void *)threadp, pss.threadcnt, sizeof (core_st_t), abfd);
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  if (val != tcontext_size)
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    {
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      /* Probably too small to be a core file */
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      if (bfd_get_error () != bfd_error_system_call)
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        bfd_set_error (bfd_error_wrong_format);
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      return NULL;
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    }
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  core_signal (abfd) = threadp->currsig;
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  newsect = make_bfd_asection (abfd, ".stack",
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                               SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
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                               pss.ssize,
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                               pss.slimit,
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                               pagesize + tcontext_size);
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  if (!newsect)
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    return NULL;
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  newsect = make_bfd_asection (abfd, ".data",
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                               SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
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                               pss.data_len + pss.bss_len,
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                               pss.data_start,
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                               pagesize + tcontext_size + pss.ssize
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#if defined (SPARC) || defined (__SPARC__)
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                               /* SPARC Lynx seems to start dumping
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                                  the .data section at a page
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                                  boundary.  It's OK to check a
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                                  #define like SPARC here because this
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                                  file can only be compiled on a Lynx
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                                  host.  */
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                               + pss.data_start % pagesize
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#endif
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                               );
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  if (!newsect)
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    return NULL;
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/* And, now for the .reg/XXX pseudo sections.  Each thread has it's own
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   .reg/XXX section, where XXX is the thread id (without leading zeros).  The
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   currently running thread (at the time of the core dump) also has an alias
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   called `.reg' (just to keep GDB happy).  Note that we use `.reg/XXX' as
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   opposed to `.regXXX' because GDB expects that .reg2 will be the floating-
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   point registers.  */
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  newsect = make_bfd_asection (abfd, ".reg",
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                               SEC_HAS_CONTENTS,
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                               sizeof (core_st_t),
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                               0,
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                               pagesize);
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  if (!newsect)
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    return NULL;
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  for (secnum = 0; secnum < pss.threadcnt; secnum++)
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    {
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      char secname[100];
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      sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid));
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      newsect = make_bfd_asection (abfd, secname,
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                                   SEC_HAS_CONTENTS,
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                                   sizeof (core_st_t),
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                                   0,
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                                   pagesize + secnum * sizeof (core_st_t));
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      if (!newsect)
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        return NULL;
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    }
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  return abfd->xvec;
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}
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char *
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lynx_core_file_failing_command (abfd)
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     bfd *abfd;
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{
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  return core_command (abfd);
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}
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/* ARGSUSED */
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int
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lynx_core_file_failing_signal (abfd)
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     bfd *abfd;
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{
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  return core_signal (abfd);
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}
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/* ARGSUSED */
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boolean
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lynx_core_file_matches_executable_p  (core_bfd, exec_bfd)
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     bfd *core_bfd, *exec_bfd;
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{
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  return true;          /* FIXME, We have no way of telling at this point */
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}
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#endif /* LYNX_CORE */

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