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cell-binutils  2.17cvs20070401
Classes | Defines | Enumerations | Functions | Variables
cisco-core.c File Reference
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include <signal.h>

Go to the source code of this file.

Classes

struct  crashinfo_external
struct  cisco_core_struct

Defines

#define SIGTRAP   5
#define SIGEMT   6
#define SIGBUS   10
#define CRASH_MAGIC   0xdead1234
#define MASK_ADDR(x)   ((x) & 0x0fffffff) /* Mask crash info address */
#define cisco_core_file_matches_executable_p   generic_core_file_matches_executable_p

Enumerations

enum  crashreason { CRASH_REASON_NOTCRASHED = 0, CRASH_REASON_EXCEPTION = 1, CRASH_REASON_CORRUPT = 2 }

Functions

static const bfd_target
*cisco_core_file_validate 
PARAMS ((bfd *, int))
static const bfd_target
*cisco_core_file_p 
PARAMS ((bfd *))
static const bfd_targetcisco_core_file_validate (bfd *abfd, int crash_info_loc)
static const bfd_targetcisco_core_file_p (bfd *abfd)
char * cisco_core_file_failing_command (abfd)
int cisco_core_file_failing_signal (abfd)

Variables

int crash_info_locs []
const bfd_target cisco_core_little_vec
const bfd_target cisco_core_big_vec

Class Documentation

struct crashinfo_external

Definition at line 57 of file cisco-core.c.

Class Members
char bssbase
char cpu_vector
char database
char magic
char rambase
char reason
char registers
char textbase
char version
struct cisco_core_struct

Definition at line 69 of file cisco-core.c.

Class Members
int sig

Define Documentation

Definition at line 78 of file cisco-core.c.

#define CRASH_MAGIC   0xdead1234

Definition at line 48 of file cisco-core.c.

#define MASK_ADDR (   x)    ((x) & 0x0fffffff) /* Mask crash info address */

Definition at line 49 of file cisco-core.c.

#define SIGBUS   10

Definition at line 36 of file cisco-core.c.

#define SIGEMT   6

Definition at line 33 of file cisco-core.c.

#define SIGTRAP   5

Definition at line 30 of file cisco-core.c.


Enumeration Type Documentation

Enumerator:
CRASH_REASON_NOTCRASHED 
CRASH_REASON_EXCEPTION 
CRASH_REASON_CORRUPT 

Definition at line 51 of file cisco-core.c.


Function Documentation

Definition at line 308 of file cisco-core.c.

{
  return NULL;
}

Definition at line 315 of file cisco-core.c.

{
  return abfd->tdata.cisco_core_data->sig;
}
static const bfd_target* cisco_core_file_p ( bfd abfd) [static]

Definition at line 292 of file cisco-core.c.

{
  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);
}

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static const bfd_target* cisco_core_file_validate ( bfd abfd,
int  crash_info_loc 
) [static]

Definition at line 84 of file cisco-core.c.

{
  char buf[4];
  unsigned int crashinfo_offset;
  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, (file_ptr) crash_info_loc, SEEK_SET) != 0)
    return NULL;

  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 = MASK_ADDR (bfd_get_32 (abfd, buf));

  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_bread (&crashinfo, (bfd_size_type) sizeof (crashinfo), abfd);
  if (nread != sizeof (crashinfo))
    {
      if (bfd_get_error () != bfd_error_system_call)
       bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (bfd_stat (abfd, &statbuf) < 0)
    {
      bfd_set_error (bfd_error_system_call);
      return NULL;
    }

  magic = bfd_get_32 (abfd, crashinfo.magic);
  if (magic != CRASH_MAGIC)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  version = bfd_get_32 (abfd, crashinfo.version);
  if (version == 0)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }
  else if (version == 1)
    {
      /* V1 core dumps don't specify the dump base, assume 0 */
      rambase = 0;
    }
  else
    {
      rambase = bfd_get_32 (abfd, crashinfo.rambase);
    }

  /* OK, we believe you.  You're a core file.  */

  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;

  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.  */

      /* This is 68k-specific; for MIPS we'll need to interpret
        cpu_vector differently based on the target configuration
        (since CISCO core files don't seem to have the processor
        encoded in them).  */

      switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
       {
          /* bus error           */
       case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
          /* 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         */
       case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
          /* chk instruction     */
       case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
          /* 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          */
       case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP;  break;
          /* line 1010 emulator  */
       case 10: abfd->tdata.cisco_core_data->sig = SIGILL;  break;
          /* line 1111 emulator  */
       case 11: abfd->tdata.cisco_core_data->sig = SIGILL;  break;

         /* Coprocessor protocol violation.  Using a standard MMU or FPU
            this cannot be triggered by software.  Call it a SIGBUS.  */
       case 13: abfd->tdata.cisco_core_data->sig = SIGBUS;  break;

         /* interrupt           */
       case 31: abfd->tdata.cisco_core_data->sig = SIGINT;  break;
         /* breakpoint          */
       case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP;  break;

         /* floating point err  */
       case 48: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
         /* floating point err  */
       case 49: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
         /* zero divide         */
       case 50: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
         /* underflow           */
       case 51: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
         /* operand error       */
       case 52: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
          /* overflow            */
       case 53: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
         /* NAN                 */
       case 54: abfd->tdata.cisco_core_data->sig = SIGFPE;  break;
       default:
#ifndef SIGEMT
#define SIGEMT SIGTRAP
#endif
         /* "software generated"*/
         abfd->tdata.cisco_core_data->sig = SIGEMT;
       }
      break;
    default:
      /* Unknown crash reason.  */
      abfd->tdata.cisco_core_data->sig = 0;
      break;
    }

  /* 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.  */

  flags = SEC_HAS_CONTENTS;
  asect = bfd_make_section_anyway_with_flags (abfd, ".crash", flags);
  if (asect == NULL)
    goto error_return;
  asect->vma = 0;
  asect->filepos = crashinfo_offset;
  asect->size = sizeof (crashinfo);

  /* Create a ".reg" section to allow access to the saved
     registers.  */

  asect = bfd_make_section_anyway_with_flags (abfd, ".reg", flags);
  if (asect == NULL)
    goto error_return;
  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:
  bfd_release (abfd, abfd->tdata.any);
  abfd->tdata.any = NULL;
  bfd_section_list_clear (abfd);
  return NULL;
}

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static const bfd_target* cisco_core_file_validate PARAMS ( (bfd *, int ) [static]
static const bfd_target* cisco_core_file_p PARAMS ( (bfd *)  ) [static]

Variable Documentation

Definition at line 323 of file cisco-core.c.

Definition at line 373 of file cisco-core.c.

Initial value:
 {
  0x0250,     
  0x0400,     
  0x0FFC,     
  0x3000,     
  0x4FFC,     
  -1
}

Definition at line 39 of file cisco-core.c.