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Diffstat (limited to 'bfd/cisco-core.c')
-rw-r--r--bfd/cisco-core.c172
1 files changed, 144 insertions, 28 deletions
diff --git a/bfd/cisco-core.c b/bfd/cisco-core.c
index e1fa177..3492e75 100644
--- a/bfd/cisco-core.c
+++ b/bfd/cisco-core.c
@@ -36,43 +36,60 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
# define SIGBUS 10
#endif
-#define CRASH_INFO (0xffc)
-#define CRASH_MAGIC 0xdead1234
+int crash_info_locs[] = {
+ 0x0250, /* mips, ppc, x86, i960 */
+ 0x0400, /* m68k, mips, x86, i960 */
+ 0x0FFC, /* m68k, mips, ppc, x86, i960 */
+ 0x3000, /* ppc */
+ 0x4FFC, /* m68k */
+ -1
+};
+
+#define CRASH_MAGIC 0xdead1234
+#define MASK_ADDR(x) ((x) & 0x0fffffff) /* Mask crash info address */
typedef enum {
CRASH_REASON_NOTCRASHED = 0,
CRASH_REASON_EXCEPTION = 1,
CRASH_REASON_CORRUPT = 2,
- } crashreason;
+} crashreason;
-struct crashinfo_external
-{
- char magic[4]; /* Magic number */
+typedef struct {
+ 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) */
-};
+ char textbase[4]; /* Base of .text section (not in V3 crash info) */
+ char database[4]; /* Base of .data section (not in V3 crash info) */
+ char bssbase[4]; /* Base of .bss section (not in V3 crash info) */
+} crashinfo_external;
struct cisco_core_struct
{
int sig;
};
+/* Examine the file for a crash info struct at the offset given by
+ CRASH_INFO_LOC. */
+
static const bfd_target *
-cisco_core_file_p (abfd)
+cisco_core_file_validate (abfd, crash_info_loc)
bfd *abfd;
+ int crash_info_loc;
{
char buf[4];
unsigned int crashinfo_offset;
- struct crashinfo_external crashinfo;
+ crashinfo_external crashinfo;
int nread;
+ unsigned int magic;
+ unsigned int version;
unsigned int rambase;
sec_ptr asect;
struct stat statbuf;
- if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
+ if (bfd_seek (abfd, crash_info_loc, SEEK_SET) != 0)
return NULL;
nread = bfd_read (buf, 1, 4, abfd);
@@ -82,10 +99,14 @@ cisco_core_file_p (abfd)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
- crashinfo_offset = bfd_get_32 (abfd, buf);
+ crashinfo_offset = MASK_ADDR (bfd_get_32 (abfd, buf));
if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
- return NULL;
+ {
+ /* Most likely we failed because of a bogus (huge) offset */
+ bfd_set_error (bfd_error_wrong_format);
+ return NULL;
+ }
nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
if (nread != sizeof (crashinfo))
@@ -101,24 +122,27 @@ cisco_core_file_p (abfd)
return NULL;
}
- if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
+ magic = bfd_get_32 (abfd, crashinfo.magic);
+ if (magic != CRASH_MAGIC)
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
- switch (bfd_get_32 (abfd, crashinfo.version))
+ version = bfd_get_32 (abfd, crashinfo.version);
+ if (version == 0)
{
- case 0:
bfd_set_error (bfd_error_wrong_format);
return NULL;
- case 1:
+ }
+ else if (version == 1)
+ {
+ /* V1 core dumps don't specify the dump base, assume 0 */
rambase = 0;
- break;
- default:
- case 2:
+ }
+ else
+ {
rambase = bfd_get_32 (abfd, crashinfo.rambase);
- break;
}
/* OK, we believe you. You're a core file. */
@@ -211,22 +235,43 @@ cisco_core_file_p (abfd)
abfd->sections = NULL;
abfd->section_count = 0;
+ /* Create a ".reg" section to allow access to the saved
+ registers. */
+
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;
+ /* Since we don't know the exact size of the saved register info,
+ choose a register section size that is either the remaining part
+ of the file, or 1024, whichever is smaller. */
+ nread = statbuf.st_size - asect->filepos;
+ asect->_raw_size = (nread < 1024) ? nread : 1024;
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. */
+ /* Create a ".crash" section to allow access to the saved
+ crash information. */
+
+ asect = (asection *) bfd_zmalloc (sizeof (asection));
+ if (asect == NULL)
+ goto error_return;
+ asect->name = ".crash";
+ asect->flags = SEC_HAS_CONTENTS;
+ asect->vma = 0;
+ asect->filepos = crashinfo_offset;
+ asect->_raw_size = sizeof (crashinfo);
+ asect->next = abfd->sections;
+ abfd->sections = asect;
+ ++abfd->section_count;
+
+ /* Create a ".data" section that maps the entire file, which is
+ essentially a dump of the target system's RAM. */
+
asect = (asection *) bfd_zmalloc (sizeof (asection));
if (asect == NULL)
goto error_return;
@@ -242,6 +287,9 @@ cisco_core_file_p (abfd)
return abfd->xvec;
+ /* Get here if we have already started filling out the BFD
+ and there is an error of some kind. */
+
error_return:
{
sec_ptr nextsect;
@@ -256,6 +304,22 @@ cisco_core_file_p (abfd)
}
}
+static const bfd_target *
+cisco_core_file_p (abfd)
+ bfd *abfd;
+{
+ int *crash_info_locp;
+ const bfd_target *target = NULL;
+
+ for (crash_info_locp = crash_info_locs;
+ *crash_info_locp != -1 && target == NULL;
+ crash_info_locp++)
+ {
+ target = cisco_core_file_validate (abfd, *crash_info_locp);
+ }
+ return (target);
+}
+
char *
cisco_core_file_failing_command (abfd)
bfd *abfd;
@@ -278,9 +342,11 @@ cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
return true;
}
-const bfd_target cisco_core_vec =
+extern const bfd_target cisco_core_little_vec;
+
+const bfd_target cisco_core_big_vec =
{
- "trad-core",
+ "cisco-ios-core-big",
bfd_target_unknown_flavour,
BFD_ENDIAN_BIG, /* target byte order */
BFD_ENDIAN_BIG, /* target headers byte order */
@@ -323,7 +389,57 @@ const bfd_target cisco_core_vec =
BFD_JUMP_TABLE_LINK (_bfd_nolink),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
- NULL,
+ & cisco_core_little_vec,
+
+ (PTR) 0 /* backend_data */
+};
+
+const bfd_target cisco_core_little_vec =
+ {
+ "cisco-ios-core-little",
+ bfd_target_unknown_flavour,
+ BFD_ENDIAN_LITTLE, /* target byte order */
+ BFD_ENDIAN_LITTLE, /* 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_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
+ bfd_getl64, bfd_getl_signed_64, bfd_putl64,
+ bfd_getl32, bfd_getl_signed_32, bfd_putl32,
+ bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* 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),
+
+ &cisco_core_big_vec,
(PTR) 0 /* backend_data */
};
generated by cgit v1.1 at 2024-07-09 23:10:52 +0000