From f4bda9848fb4c4ae3e4cccba77d5ef26099e451e Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 28 Sep 1999 21:45:39 +0000 Subject: Fred Fish * targets.c (cisco_core_vec): Replaced with two new vecs ... (cisco_core_big_vec): Add new bigendian vec. (cisco_core_little_vec): Add new little endian vec. * cisco-core.c (CRASH_INFO): Fixed offset replaced with ... (crash_info_locs): Add array of possible offsets. (MASK_ADDR): Mask to apply to crash info offset. (crashinfo_external): Add textbase, database, bssbase and turn into a typedef. (cisco_core_file_validate): Renamed from cisco_core_file_p. Many small changes to account for additional hardware versions. Pick a reasonable size for ".reg" section. Add a ".crash" section to allow access to crashinfo_external struct. (cisco_core_file_p): New version of this function that iterates over crash_info_locs, calling cisco_core_file_validate. (cisco_core_vec): Old big endian only vec replaced with ... (cisco_core_big_vec): Add big endian version. (cisco_core_little_vec): Add little endian version. * configure.in (cisco_core_vec): Split to two new vectors ... (cisco_core_big_vec): New target vector. (cisco_core_little_vec): New target vector. * configure: Regenerate. * config.bfd (targ): For m68*-*-aout* targ, change cisco_core_vec to cisco_core_big_vec in targ_selvecs. --- bfd/cisco-core.c | 172 ++++++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 144 insertions(+), 28 deletions(-) (limited to 'bfd/cisco-core.c') 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 */ }; -- cgit v1.1