* trad-core.c (trad_unix_core_file_p): Call bfd_zmalloc not

	bfd_zalloc for rawptr, because later on we may call free, not
	bfd_release, on it.

	* bfd.c (struct _bfd): Add cisco_core_struct to tdata union.
	* libbfd.c (bfd_read, bfd_seek): Add comments regarding errors.
	* cisco-core.c: New file.
	* Makfile.in: Change accordingly.
	* bfd-in2.h: Rebuilt.

1 files changed, 334 insertions, 0 deletions

diff --git a/bfd/cisco-core.c b/bfd/cisco-core.c
index e69de29..f49b2d3 100644
--- a/bfd/cisco-core.c
+++ b/bfd/cisco-core.c
@@ -0,0 +1,334 @@
+/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+
+#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 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)
+    {
+      /* Maybe the file is too small (FIXME: what about other errors).  */
+      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))
+    {
+      /* Maybe the file is too small (FIXME: what about other errors).  */
+      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 (abfd, sizeof (struct cisco_core_struct));
+  if (abfd->tdata.cisco_core_data == NULL)
+    {
+      bfd_set_error (bfd_error_no_memory);
+      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.
+	 FIXME: convert cpu_vector to a signal number.  */
+      abfd->tdata.cisco_core_data->sig = 0;
+      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)
+    {
+      bfd_set_error (bfd_error_no_memory);
+      goto error_return;
+    }
+  asect->name = ".reg";
+  asect->flags = SEC_ALLOC | 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)
+    {
+      bfd_set_error (bfd_error_no_memory);
+      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);
+    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;
+}
+
+/* No archive file support via this BFD */
+#define	cisco_openr_next_archived_file	bfd_generic_openr_next_archived_file
+#define	cisco_generic_stat_arch_elt		bfd_generic_stat_arch_elt
+#define	cisco_slurp_armap			bfd_false
+#define	cisco_slurp_extended_name_table	bfd_true
+#define	cisco_write_armap			(boolean (*) PARAMS	\
+    ((bfd *arch, unsigned int elength, struct orl *map, \
+      unsigned int orl_count, int stridx))) bfd_false
+#define	cisco_truncate_arname		bfd_dont_truncate_arname
+#define	aout_32_openr_next_archived_file	bfd_generic_openr_next_archived_file
+
+#define	cisco_close_and_cleanup		bfd_generic_close_and_cleanup
+#define	cisco_set_section_contents		(boolean (*) PARAMS	\
+        ((bfd *abfd, asection *section, PTR data, file_ptr offset,	\
+        bfd_size_type count))) bfd_generic_set_section_contents
+#define	cisco_get_section_contents		bfd_generic_get_section_contents
+#define	cisco_new_section_hook		(boolean (*) PARAMS	\
+	((bfd *, sec_ptr))) bfd_true
+#define	cisco_get_symtab_upper_bound	bfd_0u
+#define	cisco_get_symtab			(unsigned int (*) PARAMS \
+        ((bfd *, struct symbol_cache_entry **))) bfd_0u
+#define	cisco_get_reloc_upper_bound		(unsigned int (*) PARAMS \
+	((bfd *, sec_ptr))) bfd_0u
+#define	cisco_canonicalize_reloc		(unsigned int (*) PARAMS \
+	((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
+#define	cisco_make_empty_symbol		(struct symbol_cache_entry * \
+	(*) PARAMS ((bfd *))) bfd_false
+#define	cisco_print_symbol			(void (*) PARAMS	\
+	((bfd *, PTR, struct symbol_cache_entry  *,			\
+	bfd_print_symbol_type))) bfd_false
+#define	cisco_get_symbol_info		(void (*) PARAMS	\
+	((bfd *, struct symbol_cache_entry  *,			\
+	symbol_info *))) bfd_false
+#define	cisco_get_lineno			(alent * (*) PARAMS	\
+	((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
+#define	cisco_set_arch_mach			(boolean (*) PARAMS	\
+	((bfd *, enum bfd_architecture, unsigned long))) bfd_false
+#define	cisco_find_nearest_line		(boolean (*) PARAMS	\
+        ((bfd *abfd, struct sec  *section,				\
+         struct symbol_cache_entry  **symbols,bfd_vma offset,		\
+         CONST char **file, CONST char **func, unsigned int *line))) bfd_false
+#define	cisco_sizeof_headers		(int (*) PARAMS	\
+	((bfd *, boolean))) bfd_0
+
+#define cisco_bfd_debug_info_start		bfd_void
+#define cisco_bfd_debug_info_end		bfd_void
+#define cisco_bfd_debug_info_accumulate	(void (*) PARAMS	\
+	((bfd *, struct sec *))) bfd_void
+#define cisco_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
+#define cisco_bfd_relax_section		bfd_generic_relax_section
+#define cisco_bfd_reloc_type_lookup \
+  ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
+#define cisco_bfd_make_debug_symbol \
+  ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
+#define cisco_bfd_link_hash_table_create \
+  ((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
+#define cisco_bfd_link_add_symbols \
+  ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
+#define cisco_bfd_final_link \
+  ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
+#define cisco_bfd_copy_private_section_data \
+  ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_false)
+#define cisco_bfd_copy_private_bfd_data \
+  ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_false)
+#define cisco_bfd_is_local_label \
+  ((boolean (*) PARAMS ((bfd *, asection *))) bfd_false)
+
+/* If somebody calls any byte-swapping routines, shoot them.  */
+void
+swap_abort()
+{
+  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
+}
+#define	NO_GET	((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
+#define	NO_PUT	((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
+#define	NO_SIGNED_GET \
+  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
+
+bfd_target trad_core_vec =
+  {
+    "trad-core",
+    bfd_target_unknown_flavour,
+    true,			/* target byte order */
+    true,			/* 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 */
+    3,							   /* minimum alignment power */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit data */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit hdrs */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit hdrs */
+    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit 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
+    },
+    
+    JUMP_TABLE(cisco),
+    (PTR) 0			/* backend_data */
+};