19990502 sourceware import

1 files changed, 327 insertions, 0 deletions

diff --git a/bfd/cisco-core.c b/bfd/cisco-core.c
new file mode 100644
index 0000000000..11c9bbd494
--- /dev/null
+++ b/bfd/cisco-core.c
@@ -0,0 +1,327 @@
+/* BFD back-end for CISCO crash dumps.
+
+Copyright 1994 Free Software Foundation, Inc.
+
+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"
+/* core_file_failing_signal returns a host signal (this probably should
+   be fixed).  */
+#include <signal.h>
+
+/* for MSVC builds */
+#ifndef SIGTRAP
+# define SIGTRAP 5
+#endif
+#ifndef SIGEMT
+# define SIGEMT 6
+#endif
+#ifndef SIGBUS
+# define SIGBUS 10
+#endif
+
+#define CRASH_INFO (0xffc)
+#define CRASH_MAGIC 0xdead1234
+
+typedef enum {
+    CRASH_REASON_NOTCRASHED = 0,
+    CRASH_REASON_EXCEPTION = 1,
+    CRASH_REASON_CORRUPT = 2,
+  } crashreason;
+
+struct crashinfo_external
+{
+  char magic[4];			/* Magic number */
+  char version[4];		/* Version number */
+  char reason[4];		/* Crash reason */
+  char cpu_vector[4];		/* CPU vector for exceptions */
+  char registers[4];		/* Pointer to saved registers */
+  char rambase[4];		/* Base of RAM (not in V1 crash info) */
+};
+
+struct cisco_core_struct
+{
+  int sig;
+};
+
+static const bfd_target *
+cisco_core_file_p (abfd)
+     bfd *abfd;
+{
+  char buf[4];
+  unsigned int crashinfo_offset;
+  struct crashinfo_external crashinfo;
+  int nread;
+  unsigned int rambase;
+  sec_ptr asect;
+  struct stat statbuf;
+
+  if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
+    return NULL;
+
+  nread = bfd_read (buf, 1, 4, abfd);
+  if (nread != 4)
+    {
+      if (bfd_get_error () != bfd_error_system_call)
+	bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+  crashinfo_offset = bfd_get_32 (abfd, buf);
+
+  if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
+    return NULL;
+
+  nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
+  if (nread != sizeof (crashinfo))
+    {
+      if (bfd_get_error () != bfd_error_system_call)
+	bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  if (bfd_stat (abfd, &statbuf) < 0)
+    {
+      bfd_set_error (bfd_error_system_call);
+      return NULL;
+    }
+
+  if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
+    {
+      bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    }
+
+  switch (bfd_get_32 (abfd, crashinfo.version))
+    {
+    case 0:
+      bfd_set_error (bfd_error_wrong_format);
+      return NULL;
+    case 1:
+      rambase = 0;
+      break;
+    default:
+    case 2:
+      rambase = bfd_get_32 (abfd, crashinfo.rambase);
+      break;
+    }
+
+  /* OK, we believe you.  You're a core file.  */
+
+  abfd->tdata.cisco_core_data =
+    ((struct cisco_core_struct *)
+     bfd_zmalloc (sizeof (struct cisco_core_struct)));
+  if (abfd->tdata.cisco_core_data == NULL)
+    return NULL;
+
+  switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
+    {
+    case CRASH_REASON_NOTCRASHED:
+      /* Crash file probably came from write core.  */
+      abfd->tdata.cisco_core_data->sig = 0;
+      break;
+    case CRASH_REASON_CORRUPT:
+      /* The crash context area was corrupt -- proceed with caution.
+	 We have no way of passing this information back to the caller.  */
+      abfd->tdata.cisco_core_data->sig = 0;
+      break;
+    case CRASH_REASON_EXCEPTION:
+      /* Crash occured due to CPU exception.  */
+
+      /* This is 68k-specific; for MIPS we'll need to interpret
+	 cpu_vector differently based on the target configuration
+	 (since CISCO core files don't seem to have the processor
+	 encoded in them).  */
+
+      switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
+	{
+	   /* bus error           */
+	case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
+	   /* address error       */
+	case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
+	   /* illegal instruction */
+	case 4 : abfd->tdata.cisco_core_data->sig = SIGILL;  break;
+	   /* zero divide         */
+	case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	   /* chk instruction     */
+	case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
+	   /* trapv instruction   */
+	case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
+	   /* privilege violation */
+	case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
+	   /* trace trap          */
+	case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP;  break;
+	   /* line 1010 emulator  */
+	case 10: abfd->tdata.cisco_core_data->sig = SIGILL;  break;
+	   /* line 1111 emulator  */
+	case 11: abfd->tdata.cisco_core_data->sig = SIGILL;  break;
+
+	  /* Coprocessor protocol violation.  Using a standard MMU or FPU
+	     this cannot be triggered by software.  Call it a SIGBUS.  */
+	case 13: abfd->tdata.cisco_core_data->sig = SIGBUS;  break;
+
+	  /* interrupt           */
+	case 31: abfd->tdata.cisco_core_data->sig = SIGINT;  break;
+	  /* breakpoint          */
+	case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP;  break;
+
+	  /* floating point err  */
+	case 48: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	  /* floating point err  */
+	case 49: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	  /* zero divide         */
+	case 50: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	  /* underflow           */
+	case 51: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	  /* operand error       */
+	case 52: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	   /* overflow            */
+	case 53: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	  /* NAN                 */
+	case 54: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
+	default:
+#ifndef SIGEMT
+#define SIGEMT SIGTRAP
+#endif
+	  /* "software generated"*/
+	  abfd->tdata.cisco_core_data->sig = SIGEMT;
+	}
+      break;
+    default:
+      /* Unknown crash reason.  */
+      abfd->tdata.cisco_core_data->sig = 0;
+      break;
+    }
+
+  abfd->sections = NULL;
+  abfd->section_count = 0;
+
+  asect = (asection *) bfd_zmalloc (sizeof (asection));
+  if (asect == NULL)
+    goto error_return;
+  asect->name = ".reg";
+  asect->flags = SEC_HAS_CONTENTS;
+  /* This can be bigger than the real size.  Set it to the size of the whole
+     core file.  */
+  asect->_raw_size = statbuf.st_size;
+  asect->vma = 0;
+  asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase;
+  asect->next = abfd->sections;
+  abfd->sections = asect;
+  ++abfd->section_count;
+
+  /* There is only one section containing data from the target system's RAM.
+     We call it .data.  */
+  asect = (asection *) bfd_zmalloc (sizeof (asection));
+  if (asect == NULL)
+    goto error_return;
+  asect->name = ".data";
+  asect->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
+  /* The size of memory is the size of the core file itself.  */
+  asect->_raw_size = statbuf.st_size;
+  asect->vma = rambase;
+  asect->filepos = 0;
+  asect->next = abfd->sections;
+  abfd->sections = asect;
+  ++abfd->section_count;
+
+  return abfd->xvec;
+
+ error_return:
+  {
+    sec_ptr nextsect;
+    for (asect = abfd->sections; asect != NULL;)
+      {
+	nextsect = asect->next;
+	free (asect);
+	asect = nextsect;
+      }
+    free (abfd->tdata.cisco_core_data);
+    return NULL;
+  }
+}
+
+char *
+cisco_core_file_failing_command (abfd)
+     bfd *abfd;
+{
+  return NULL;
+}
+
+int
+cisco_core_file_failing_signal (abfd)
+     bfd *abfd;
+{
+  return abfd->tdata.cisco_core_data->sig;
+}
+
+boolean
+cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
+     bfd *core_bfd;
+     bfd *exec_bfd;
+{
+  return true;
+}
+
+const bfd_target cisco_core_vec =
+  {
+    "trad-core",
+    bfd_target_unknown_flavour,
+    BFD_ENDIAN_BIG,		/* target byte order */
+    BFD_ENDIAN_BIG,		/* 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 */
+    bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+    bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+    bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
+    bfd_getb64, bfd_getb_signed_64, bfd_putb64,
+    bfd_getb32, bfd_getb_signed_32, bfd_putb32,
+    bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
+
+    {				/* bfd_check_format */
+     _bfd_dummy_target,		/* unknown format */
+     _bfd_dummy_target,		/* object file */
+     _bfd_dummy_target,		/* archive */
+     cisco_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 (cisco),
+       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 */
+};