Initial revision

1 files changed, 233 insertions, 0 deletions

diff --git a/bfd/lynx-core.c b/bfd/lynx-core.c
new file mode 100644
index 0000000000..2358177dbc
--- /dev/null
+++ b/bfd/lynx-core.c
@@ -0,0 +1,233 @@
+/* BFD back end for Lynx core files
+   Copyright 1993 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 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.  */
+
+#include "bfd.h"
+#include "sysdep.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)
+
+/* Handle Lynx core dump file.  */
+
+static asection *
+make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
+     bfd *abfd;
+     CONST char *name;
+     flagword flags;
+     bfd_size_type _raw_size;
+     bfd_vma vma;
+     file_ptr filepos;
+{
+  asection *asect;
+  char *newname;
+
+  newname = bfd_alloc (abfd, strlen (name) + 1);
+  if (!newname)
+    return NULL;
+
+  strcpy (newname, name);
+
+  asect = bfd_make_section (abfd, newname);
+  if (!asect)
+    return NULL;
+
+  asect->flags = flags;
+  asect->_raw_size = _raw_size;
+  asect->vma = vma;
+  asect->filepos = filepos;
+  asect->alignment_power = 2;
+
+  return asect;
+}
+
+/* ARGSUSED */
+const bfd_target *
+lynx_core_file_p (abfd)
+     bfd *abfd;
+{
+  int val;
+  int secnum;
+  struct pssentry pss;
+  size_t tcontext_size;
+  core_st_t *threadp;
+  int pagesize;
+  asection *newsect;
+
+  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, 0, SEEK_SET) != 0)
+    return NULL;
+
+  val = bfd_read ((void *)&pss, 1, sizeof pss, abfd);
+  if (val != sizeof pss)
+    {
+      /* Too small to be a core file */
+      if (bfd_get_error () != bfd_error_system_call)
+	bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  core_hdr (abfd) = (struct lynx_core_struct *)
+    bfd_zalloc (abfd, sizeof (struct lynx_core_struct));
+
+  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)
+    return NULL;
+
+  /* Save thread contexts */
+
+  if (bfd_seek (abfd, pagesize, SEEK_SET) != 0)
+    return NULL;
+
+  val = bfd_read ((void *)threadp, pss.threadcnt, sizeof (core_st_t), abfd);
+
+  if (val != 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);
+      return NULL;
+    }
+  
+  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)
+    return NULL;
+
+  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)
+    return NULL;
+
+/* 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)
+    return NULL;
+
+  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)
+	return NULL;
+    }
+
+  return abfd->xvec;
+}
+
+char *
+lynx_core_file_failing_command (abfd)
+     bfd *abfd;
+{
+  return core_command (abfd);
+}
+
+/* ARGSUSED */
+int
+lynx_core_file_failing_signal (abfd)
+     bfd *abfd;
+{
+  return core_signal (abfd);
+}
+
+/* ARGSUSED */
+boolean
+lynx_core_file_matches_executable_p  (core_bfd, exec_bfd)
+     bfd *core_bfd, *exec_bfd;
+{
+  return true;		/* FIXME, We have no way of telling at this point */
+}
+
+#endif /* LYNX_CORE */