47dc9b52c2
* libbfd.c (bfd_read, bfd_seek): Add comments regarding errors. * cisco-core.c: New file. * Makefile.in: Change accordingly. * configure.in: Recognize cisco_core_vec. * config/m68k-aout.mt (SELECT_VECS): Add cisco_core_vec. * targets.c: Add cisco_core_vec. * bfd-in2.h: Rebuilt.
380 lines
12 KiB
C
380 lines
12 KiB
C
/* BFD back-end for CISCO crash dumps.
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Copyright 1994 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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/* core_file_failing_signal returns a host signal (this probably should
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be fixed). */
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#include <signal.h>
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#define CRASH_INFO (0xffc)
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#define CRASH_MAGIC 0xdead1234
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typedef enum {
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CRASH_REASON_NOTCRASHED = 0,
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CRASH_REASON_EXCEPTION = 1,
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CRASH_REASON_CORRUPT = 2,
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} crashreason;
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struct crashinfo_external
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{
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char magic[4]; /* Magic number */
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char version[4]; /* Version number */
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char reason[4]; /* Crash reason */
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char cpu_vector[4]; /* CPU vector for exceptions */
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char registers[4]; /* Pointer to saved registers */
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char rambase[4]; /* Base of RAM (not in V1 crash info) */
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};
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struct cisco_core_struct
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{
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int sig;
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};
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static bfd_target *
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cisco_core_file_p (abfd)
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bfd *abfd;
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{
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char buf[4];
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unsigned int crashinfo_offset;
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struct crashinfo_external crashinfo;
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int nread;
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unsigned int rambase;
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sec_ptr asect;
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struct stat statbuf;
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if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
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return NULL;
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nread = bfd_read (buf, 1, 4, abfd);
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if (nread != 4)
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{
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/* Maybe the file is too small (FIXME: what about other errors). */
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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crashinfo_offset = bfd_get_32 (abfd, buf);
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if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
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return NULL;
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nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
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if (nread != sizeof (crashinfo))
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{
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/* Maybe the file is too small (FIXME: what about other errors). */
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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if (bfd_stat (abfd, &statbuf) < 0)
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{
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bfd_set_error (bfd_error_system_call);
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return NULL;
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}
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if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
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{
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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}
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switch (bfd_get_32 (abfd, crashinfo.version))
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{
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case 0:
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bfd_set_error (bfd_error_wrong_format);
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return NULL;
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case 1:
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rambase = 0;
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break;
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default:
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case 2:
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rambase = bfd_get_32 (abfd, crashinfo.rambase);
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break;
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}
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/* OK, we believe you. You're a core file. */
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abfd->tdata.cisco_core_data = (struct cisco_core_struct *)
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bfd_zmalloc (abfd, sizeof (struct cisco_core_struct));
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if (abfd->tdata.cisco_core_data == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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return NULL;
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}
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switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
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{
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case CRASH_REASON_NOTCRASHED:
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/* Crash file probably came from write core. */
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abfd->tdata.cisco_core_data->sig = 0;
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break;
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case CRASH_REASON_CORRUPT:
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/* The crash context area was corrupt -- proceed with caution.
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We have no way of passing this information back to the caller. */
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abfd->tdata.cisco_core_data->sig = 0;
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break;
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case CRASH_REASON_EXCEPTION:
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/* Crash occured due to CPU exception. */
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/* This is 68k-specific; for MIPS we'll need to interpret
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cpu_vector differently based on the target configuration
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(since CISCO core files don't seem to have the processor
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encoded in them). */
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switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
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{
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/* bus error */
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case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
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/* address error */
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case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
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/* illegal instruction */
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case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break;
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/* zero divide */
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case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* chk instruction */
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case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* trapv instruction */
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case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* privilege violation */
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case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
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/* trace trap */
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case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
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/* line 1010 emulator */
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case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break;
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/* line 1111 emulator */
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case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break;
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/* Coprocessor protocol violation. Using a standard MMU or FPU
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this cannot be triggered by software. Call it a SIGBUS. */
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case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break;
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/* interrupt */
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case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break;
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/* breakpoint */
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case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
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/* floating point err */
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case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* floating point err */
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case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* zero divide */
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case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* underflow */
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case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* operand error */
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case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* overflow */
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case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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/* NAN */
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case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
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default:
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/* "software generated"*/
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abfd->tdata.cisco_core_data->sig = SIGEMT;
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}
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break;
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default:
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/* Unknown crash reason. */
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abfd->tdata.cisco_core_data->sig = 0;
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break;
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}
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abfd->sections = NULL;
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abfd->section_count = 0;
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asect = (asection *) bfd_zmalloc (sizeof (asection));
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if (asect == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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goto error_return;
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}
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asect->name = ".reg";
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asect->flags = SEC_ALLOC | SEC_HAS_CONTENTS;
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/* This can be bigger than the real size. Set it to the size of the whole
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core file. */
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asect->_raw_size = statbuf.st_size;
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asect->vma = 0;
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asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase;
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asect->next = abfd->sections;
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abfd->sections = asect;
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++abfd->section_count;
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/* There is only one section containing data from the target system's RAM.
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We call it .data. */
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asect = (asection *) bfd_zmalloc (sizeof (asection));
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if (asect == NULL)
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{
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bfd_set_error (bfd_error_no_memory);
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goto error_return;
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}
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asect->name = ".data";
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asect->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS;
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/* The size of memory is the size of the core file itself. */
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asect->_raw_size = statbuf.st_size;
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asect->vma = rambase;
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asect->filepos = 0;
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asect->next = abfd->sections;
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abfd->sections = asect;
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++abfd->section_count;
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return abfd->xvec;
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error_return:
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{
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sec_ptr nextsect;
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for (asect = abfd->sections; asect != NULL;)
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{
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nextsect = asect->next;
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free (asect);
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asect = nextsect;
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}
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free (abfd->tdata);
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return NULL;
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}
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}
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char *
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cisco_core_file_failing_command (abfd)
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bfd *abfd;
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{
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return NULL;
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}
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int
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cisco_core_file_failing_signal (abfd)
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bfd *abfd;
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{
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return abfd->tdata.cisco_core_data->sig;
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}
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boolean
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cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
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bfd *core_bfd;
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bfd *exec_bfd;
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{
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return true;
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}
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/* No archive file support via this BFD */
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#define cisco_openr_next_archived_file bfd_generic_openr_next_archived_file
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#define cisco_generic_stat_arch_elt bfd_generic_stat_arch_elt
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#define cisco_slurp_armap bfd_false
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#define cisco_slurp_extended_name_table bfd_true
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#define cisco_write_armap (boolean (*) PARAMS \
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((bfd *arch, unsigned int elength, struct orl *map, \
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unsigned int orl_count, int stridx))) bfd_false
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#define cisco_truncate_arname bfd_dont_truncate_arname
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#define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
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#define cisco_close_and_cleanup bfd_generic_close_and_cleanup
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#define cisco_set_section_contents (boolean (*) PARAMS \
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((bfd *abfd, asection *section, PTR data, file_ptr offset, \
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bfd_size_type count))) bfd_generic_set_section_contents
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#define cisco_get_section_contents bfd_generic_get_section_contents
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#define cisco_new_section_hook (boolean (*) PARAMS \
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((bfd *, sec_ptr))) bfd_true
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#define cisco_get_symtab_upper_bound bfd_0u
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#define cisco_get_symtab (unsigned int (*) PARAMS \
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((bfd *, struct symbol_cache_entry **))) bfd_0u
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#define cisco_get_reloc_upper_bound (unsigned int (*) PARAMS \
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((bfd *, sec_ptr))) bfd_0u
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#define cisco_canonicalize_reloc (unsigned int (*) PARAMS \
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((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
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#define cisco_make_empty_symbol (struct symbol_cache_entry * \
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(*) PARAMS ((bfd *))) bfd_false
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#define cisco_print_symbol (void (*) PARAMS \
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((bfd *, PTR, struct symbol_cache_entry *, \
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bfd_print_symbol_type))) bfd_false
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#define cisco_get_symbol_info (void (*) PARAMS \
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((bfd *, struct symbol_cache_entry *, \
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symbol_info *))) bfd_false
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#define cisco_get_lineno (alent * (*) PARAMS \
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((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
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#define cisco_set_arch_mach (boolean (*) PARAMS \
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((bfd *, enum bfd_architecture, unsigned long))) bfd_false
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#define cisco_find_nearest_line (boolean (*) PARAMS \
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((bfd *abfd, struct sec *section, \
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struct symbol_cache_entry **symbols,bfd_vma offset, \
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CONST char **file, CONST char **func, unsigned int *line))) bfd_false
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#define cisco_sizeof_headers (int (*) PARAMS \
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((bfd *, boolean))) bfd_0
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#define cisco_bfd_debug_info_start bfd_void
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#define cisco_bfd_debug_info_end bfd_void
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#define cisco_bfd_debug_info_accumulate (void (*) PARAMS \
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((bfd *, struct sec *))) bfd_void
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#define cisco_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
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#define cisco_bfd_relax_section bfd_generic_relax_section
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#define cisco_bfd_reloc_type_lookup \
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((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
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#define cisco_bfd_make_debug_symbol \
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((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
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#define cisco_bfd_link_hash_table_create \
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((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
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#define cisco_bfd_link_add_symbols \
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((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
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#define cisco_bfd_final_link \
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((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
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#define cisco_bfd_copy_private_section_data \
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((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_false)
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#define cisco_bfd_copy_private_bfd_data \
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((boolean (*) PARAMS ((bfd *, bfd *))) bfd_false)
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#define cisco_bfd_is_local_label \
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((boolean (*) PARAMS ((bfd *, asection *))) bfd_false)
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bfd_target cisco_core_vec =
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{
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"trad-core",
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bfd_target_unknown_flavour,
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true, /* target byte order */
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true, /* target headers byte order */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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0, /* symbol prefix */
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' ', /* ar_pad_char */
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16, /* ar_max_namelen */
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3, /* minimum alignment power */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
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{ /* bfd_check_format */
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_bfd_dummy_target, /* unknown format */
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_bfd_dummy_target, /* object file */
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_bfd_dummy_target, /* archive */
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cisco_core_file_p /* a core file */
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},
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{ /* bfd_set_format */
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bfd_false, bfd_false,
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bfd_false, bfd_false
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},
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{ /* bfd_write_contents */
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bfd_false, bfd_false,
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bfd_false, bfd_false
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},
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JUMP_TABLE(cisco),
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(PTR) 0 /* backend_data */
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};
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