X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Fcisco-core.c;h=0a5bc4a213b495a7426b0a918fab08199df426e2;hb=40c75bc8b07abc5d5774ea1c439b69c96e7fd485;hp=e1fa17795d3002d397443c601dde49981ca74288;hpb=c3c89269f8afef30bf467225f538d56daf57e245;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/cisco-core.c b/bfd/cisco-core.c index e1fa17795d..0a5bc4a213 100644 --- a/bfd/cisco-core.c +++ b/bfd/cisco-core.c @@ -1,25 +1,25 @@ /* BFD back-end for CISCO crash dumps. + Copyright (C) 1994-2020 Free Software Foundation, Inc. -Copyright 1994 Free Software Foundation, Inc. + This file is part of BFD, the Binary File Descriptor library. -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 3 of the License, or + (at your option) any later version. -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. -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., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ -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 "bfd.h" #include "libbfd.h" /* core_file_failing_signal returns a host signal (this probably should be fixed). */ @@ -36,58 +36,85 @@ 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; +typedef enum +{ + CRASH_REASON_NOTCRASHED = 0, + CRASH_REASON_EXCEPTION = 1, + CRASH_REASON_CORRUPT = 2, +} crashreason; -struct crashinfo_external +typedef struct { - char magic[4]; /* Magic number */ + 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; }; + +#define cisco_core_file_matches_executable_p generic_core_file_matches_executable_p +#define cisco_core_file_pid _bfd_nocore_core_file_pid +/* 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) - bfd *abfd; +cisco_core_file_validate (bfd *abfd, int crash_info_loc) { char buf[4]; unsigned int crashinfo_offset; - struct crashinfo_external crashinfo; - int nread; + crashinfo_external crashinfo; + bfd_size_type nread; + unsigned int magic; + unsigned int version; unsigned int rambase; sec_ptr asect; struct stat statbuf; + bfd_size_type amt; + flagword flags; - if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0) + if (bfd_seek (abfd, (file_ptr) crash_info_loc, SEEK_SET) != 0) return NULL; - nread = bfd_read (buf, 1, 4, abfd); + nread = bfd_bread (buf, (bfd_size_type) 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); + crashinfo_offset = MASK_ADDR (bfd_get_32 (abfd, buf)); - if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0) - return NULL; + if (bfd_seek (abfd, (file_ptr) crashinfo_offset, SEEK_SET) != 0) + { + /* 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); + nread = bfd_bread (&crashinfo, (bfd_size_type) sizeof (crashinfo), abfd); if (nread != sizeof (crashinfo)) { if (bfd_get_error () != bfd_error_system_call) @@ -101,31 +128,33 @@ 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. */ - abfd->tdata.cisco_core_data = - ((struct cisco_core_struct *) - bfd_zmalloc (sizeof (struct cisco_core_struct))); + amt = sizeof (struct cisco_core_struct); + abfd->tdata.cisco_core_data = (struct cisco_core_struct *) bfd_zmalloc (amt); if (abfd->tdata.cisco_core_data == NULL) return NULL; @@ -150,21 +179,21 @@ cisco_core_file_p (abfd) switch (bfd_get_32 (abfd, crashinfo.cpu_vector)) { - /* bus error */ + /* bus error */ case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break; - /* address error */ + /* 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 */ + /* zero divide */ case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* chk instruction */ + /* chk instruction */ case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* trapv instruction */ + /* 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 */ + /* 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; @@ -175,24 +204,24 @@ cisco_core_file_p (abfd) this cannot be triggered by software. Call it a SIGBUS. */ case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break; - /* interrupt */ + /* interrupt */ case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break; - /* breakpoint */ + /* breakpoint */ case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break; - /* floating point err */ + /* floating point err */ case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* floating point err */ + /* floating point err */ case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* zero divide */ + /* zero divide */ case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* underflow */ + /* underflow */ case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* operand error */ + /* operand error */ case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* overflow */ + /* overflow */ case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break; - /* NAN */ + /* NAN */ case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break; default: #ifndef SIGEMT @@ -208,122 +237,190 @@ cisco_core_file_p (abfd) break; } - abfd->sections = NULL; - abfd->section_count = 0; + /* Create a ".data" section that maps the entire file, which is + essentially a dump of the target system's RAM. */ + + flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; + asect = bfd_make_section_anyway_with_flags (abfd, ".data", flags); + if (asect == NULL) + goto error_return; + /* The size of memory is the size of the core file itself. */ + asect->size = statbuf.st_size; + asect->vma = rambase; + asect->filepos = 0; + + /* Create a ".crash" section to allow access to the saved + crash information. */ - asect = (asection *) bfd_zmalloc (sizeof (asection)); + flags = SEC_HAS_CONTENTS; + asect = bfd_make_section_anyway_with_flags (abfd, ".crash", flags); 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; + asect->filepos = crashinfo_offset; + asect->size = sizeof (crashinfo); + + /* Create a ".reg" section to allow access to the saved + registers. */ - /* There is only one section containing data from the target system's RAM. - We call it .data. */ - asect = (asection *) bfd_zmalloc (sizeof (asection)); + asect = bfd_make_section_anyway_with_flags (abfd, ".reg", flags); 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; + 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->size = (nread < 1024) ? nread : 1024; 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; - for (asect = abfd->sections; asect != NULL;) - { - nextsect = asect->next; - free (asect); - asect = nextsect; - } - free (abfd->tdata.cisco_core_data); - return NULL; - } + bfd_release (abfd, abfd->tdata.any); + abfd->tdata.any = NULL; + bfd_section_list_clear (abfd); + return NULL; } -char * -cisco_core_file_failing_command (abfd) - bfd *abfd; +static const bfd_target * +cisco_core_file_p (bfd *abfd) { - return NULL; + 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); } -int -cisco_core_file_failing_signal (abfd) - bfd *abfd; +static char * +cisco_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) { - return abfd->tdata.cisco_core_data->sig; + return NULL; } -boolean -cisco_core_file_matches_executable_p (core_bfd, exec_bfd) - bfd *core_bfd; - bfd *exec_bfd; +static int +cisco_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) { - return true; + return abfd->tdata.cisco_core_data->sig; } -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), - - NULL, - - (PTR) 0 /* backend_data */ +extern const bfd_target core_cisco_le_vec; + +const bfd_target core_cisco_be_vec = +{ + "cisco-ios-core-big", + 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 */ + 0, /* match priority. */ + 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_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + { /* bfd_write_contents */ + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + + 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), + + &core_cisco_le_vec, + + NULL /* backend_data */ +}; + +const bfd_target core_cisco_le_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 */ + 0, /* match_priority */ + 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_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + { /* bfd_write_contents */ + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + + 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), + + &core_cisco_be_vec, + + NULL /* backend_data */ };