[binutils.git] / bfd / cisco-core.c

/* BFD back-end for CISCO crash dumps.

Copyright 1994 Free Software Foundation, Inc.

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 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.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
/* core_file_failing_signal returns a host signal (this probably should
   be fixed).  */
#include <signal.h>
\f
#define CRASH_INFO (0xffc)
#define CRASH_MAGIC 0xdead1234

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

struct crashinfo_external
{
  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) */
};
\f
struct cisco_core_struct
{
  int sig;
};
\f
static bfd_target *
cisco_core_file_p (abfd)
     bfd *abfd;
{
  char buf[4];
  unsigned int crashinfo_offset;
  struct crashinfo_external crashinfo;
  int nread;
  unsigned int rambase;
  sec_ptr asect;
  struct stat statbuf;

  if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
    return NULL;

  nread = bfd_read (buf, 1, 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);

  if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
    return NULL;

  nread = bfd_read (&crashinfo, 1, 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;
    }

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

  switch (bfd_get_32 (abfd, crashinfo.version))
    {
    case 0:
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    case 1:
      rambase = 0;
      break;
    default:
    case 2:
      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)));
  if (abfd->tdata.cisco_core_data == NULL)
    {
      bfd_set_error (bfd_error_no_memory);
      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:
	  /* "software generated"*/
	  abfd->tdata.cisco_core_data->sig = SIGEMT;
	}
      break;
    default:
      /* Unknown crash reason.  */
      abfd->tdata.cisco_core_data->sig = 0;
      break;
    }

  abfd->sections = NULL;
  abfd->section_count = 0;

  asect = (asection *) bfd_zmalloc (sizeof (asection));
  if (asect == NULL)
    {
      bfd_set_error (bfd_error_no_memory);
      goto error_return;
    }
  asect->name = ".reg";
  asect->flags = SEC_ALLOC | 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;

  /* There is only one section containing data from the target system's RAM.
     We call it .data.  */
  asect = (asection *) bfd_zmalloc (sizeof (asection));
  if (asect == NULL)
    {
      bfd_set_error (bfd_error_no_memory);
      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;

  return abfd->xvec;

 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;
  }
}

char *
cisco_core_file_failing_command (abfd)
     bfd *abfd;
{
  return NULL;
}

int
cisco_core_file_failing_signal (abfd)
     bfd *abfd;
{
  return abfd->tdata.cisco_core_data->sig;
}

boolean
cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
     bfd *core_bfd;
     bfd *exec_bfd;
{
  return true;
}
\f
bfd_target cisco_core_vec =
  {
    "trad-core",
    bfd_target_unknown_flavour,
    true,			/* target byte order */
    true,			/* 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 */
    3,							   /* minimum alignment power */
    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),

    (PTR) 0			/* backend_data */
};
Commit	Line	Data
f3f29240 JK	1	/* BFD back-end for CISCO crash dumps.
	2
	3	Copyright 1994 Free Software Foundation, Inc.
	4
	5	This file is part of BFD, the Binary File Descriptor library.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 2 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program; if not, write to the Free Software
	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	20
	21	#include "bfd.h"
	22	#include "sysdep.h"
	23	#include "libbfd.h"
1732fbd4 JK	24	/* core_file_failing_signal returns a host signal (this probably should
	25	be fixed). */
	26	#include <signal.h>
f3f29240 JK	27	\f
	28	#define CRASH_INFO (0xffc)
	29	#define CRASH_MAGIC 0xdead1234
	30
	31	typedef enum {
	32	CRASH_REASON_NOTCRASHED = 0,
	33	CRASH_REASON_EXCEPTION = 1,
	34	CRASH_REASON_CORRUPT = 2,
	35	} crashreason;
	36
	37	struct crashinfo_external
	38	{
	39	char magic[4]; /* Magic number */
	40	char version[4]; /* Version number */
	41	char reason[4]; /* Crash reason */
	42	char cpu_vector[4]; /* CPU vector for exceptions */
	43	char registers[4]; /* Pointer to saved registers */
	44	char rambase[4]; /* Base of RAM (not in V1 crash info) */
	45	};
	46	\f
	47	struct cisco_core_struct
	48	{
	49	int sig;
	50	};
	51	\f
	52	static bfd_target *
	53	cisco_core_file_p (abfd)
	54	bfd *abfd;
	55	{
	56	char buf[4];
	57	unsigned int crashinfo_offset;
	58	struct crashinfo_external crashinfo;
	59	int nread;
	60	unsigned int rambase;
	61	sec_ptr asect;
	62	struct stat statbuf;
	63
	64	if (bfd_seek (abfd, CRASH_INFO, SEEK_SET) != 0)
	65	return NULL;
	66
	67	nread = bfd_read (buf, 1, 4, abfd);
	68	if (nread != 4)
	69	{
4002f18a ILT	70	if (bfd_get_error () != bfd_error_system_call)
4002f18a ILT	71	bfd_set_error (bfd_error_wrong_format);
f3f29240 JK	72	return NULL;
	73	}
	74	crashinfo_offset = bfd_get_32 (abfd, buf);
	75
	76	if (bfd_seek (abfd, crashinfo_offset, SEEK_SET) != 0)
	77	return NULL;
	78
	79	nread = bfd_read (&crashinfo, 1, sizeof (crashinfo), abfd);
	80	if (nread != sizeof (crashinfo))
	81	{
4002f18a ILT	82	if (bfd_get_error () != bfd_error_system_call)
4002f18a ILT	83	bfd_set_error (bfd_error_wrong_format);
f3f29240 JK	84	return NULL;
	85	}
	86
	87	if (bfd_stat (abfd, &statbuf) < 0)
	88	{
	89	bfd_set_error (bfd_error_system_call);
	90	return NULL;
	91	}
	92
	93	if (bfd_get_32 (abfd, crashinfo.magic) != CRASH_MAGIC)
	94	{
	95	bfd_set_error (bfd_error_wrong_format);
	96	return NULL;
	97	}
	98
	99	switch (bfd_get_32 (abfd, crashinfo.version))
	100	{
	101	case 0:
	102	bfd_set_error (bfd_error_wrong_format);
	103	return NULL;
	104	case 1:
	105	rambase = 0;
	106	break;
	107	default:
	108	case 2:
	109	rambase = bfd_get_32 (abfd, crashinfo.rambase);
	110	break;
	111	}
	112
	113	/* OK, we believe you. You're a core file. */
	114
326e32d7 ILT	115	abfd->tdata.cisco_core_data =
	116	((struct cisco_core_struct *)
	117	bfd_zmalloc (sizeof (struct cisco_core_struct)));
f3f29240 JK	118	if (abfd->tdata.cisco_core_data == NULL)
	119	{
	120	bfd_set_error (bfd_error_no_memory);
	121	return NULL;
	122	}
	123
	124	switch ((crashreason) bfd_get_32 (abfd, crashinfo.reason))
	125	{
	126	case CRASH_REASON_NOTCRASHED:
	127	/* Crash file probably came from write core. */
	128	abfd->tdata.cisco_core_data->sig = 0;
	129	break;
	130	case CRASH_REASON_CORRUPT:
	131	/* The crash context area was corrupt -- proceed with caution.
	132	We have no way of passing this information back to the caller. */
	133	abfd->tdata.cisco_core_data->sig = 0;
	134	break;
	135	case CRASH_REASON_EXCEPTION:
1732fbd4 JK	136	/* Crash occured due to CPU exception. */
	137
	138	/* This is 68k-specific; for MIPS we'll need to interpret
	139	cpu_vector differently based on the target configuration
	140	(since CISCO core files don't seem to have the processor
	141	encoded in them). */
	142
	143	switch (bfd_get_32 (abfd, crashinfo.cpu_vector))
	144	{
	145	/* bus error */
	146	case 2 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
	147	/* address error */
	148	case 3 : abfd->tdata.cisco_core_data->sig = SIGBUS; break;
	149	/* illegal instruction */
	150	case 4 : abfd->tdata.cisco_core_data->sig = SIGILL; break;
	151	/* zero divide */
	152	case 5 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	153	/* chk instruction */
	154	case 6 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	155	/* trapv instruction */
	156	case 7 : abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	157	/* privilege violation */
	158	case 8 : abfd->tdata.cisco_core_data->sig = SIGSEGV; break;
	159	/* trace trap */
	160	case 9 : abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
	161	/* line 1010 emulator */
	162	case 10: abfd->tdata.cisco_core_data->sig = SIGILL; break;
	163	/* line 1111 emulator */
	164	case 11: abfd->tdata.cisco_core_data->sig = SIGILL; break;
	165
	166	/* Coprocessor protocol violation. Using a standard MMU or FPU
	167	this cannot be triggered by software. Call it a SIGBUS. */
	168	case 13: abfd->tdata.cisco_core_data->sig = SIGBUS; break;
	169
	170	/* interrupt */
	171	case 31: abfd->tdata.cisco_core_data->sig = SIGINT; break;
	172	/* breakpoint */
	173	case 33: abfd->tdata.cisco_core_data->sig = SIGTRAP; break;
	174
	175	/* floating point err */
	176	case 48: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	177	/* floating point err */
	178	case 49: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	179	/* zero divide */
	180	case 50: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	181	/* underflow */
	182	case 51: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	183	/* operand error */
	184	case 52: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	185	/* overflow */
	186	case 53: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	187	/* NAN */
	188	case 54: abfd->tdata.cisco_core_data->sig = SIGFPE; break;
	189	default:
	190	/* "software generated"*/
	191	abfd->tdata.cisco_core_data->sig = SIGEMT;
	192	}
f3f29240 JK	193	break;
	194	default:
	195	/* Unknown crash reason. */
	196	abfd->tdata.cisco_core_data->sig = 0;
	197	break;
	198	}
	199
	200	abfd->sections = NULL;
	201	abfd->section_count = 0;
	202
	203	asect = (asection *) bfd_zmalloc (sizeof (asection));
	204	if (asect == NULL)
	205	{
	206	bfd_set_error (bfd_error_no_memory);
	207	goto error_return;
	208	}
	209	asect->name = ".reg";
	210	asect->flags = SEC_ALLOC \| SEC_HAS_CONTENTS;
	211	/* This can be bigger than the real size. Set it to the size of the whole
	212	core file. */
	213	asect->_raw_size = statbuf.st_size;
	214	asect->vma = 0;
	215	asect->filepos = bfd_get_32 (abfd, crashinfo.registers) - rambase;
	216	asect->next = abfd->sections;
	217	abfd->sections = asect;
	218	++abfd->section_count;
	219
	220	/* There is only one section containing data from the target system's RAM.
	221	We call it .data. */
	222	asect = (asection *) bfd_zmalloc (sizeof (asection));
	223	if (asect == NULL)
	224	{
	225	bfd_set_error (bfd_error_no_memory);
	226	goto error_return;
	227	}
	228	asect->name = ".data";
	229	asect->flags = SEC_ALLOC \| SEC_LOAD \| SEC_HAS_CONTENTS;
	230	/* The size of memory is the size of the core file itself. */
	231	asect->_raw_size = statbuf.st_size;
	232	asect->vma = rambase;
	233	asect->filepos = 0;
	234	asect->next = abfd->sections;
	235	abfd->sections = asect;
	236	++abfd->section_count;
	237
	238	return abfd->xvec;
	239
	240	error_return:
	241	{
	242	sec_ptr nextsect;
	243	for (asect = abfd->sections; asect != NULL;)
	244	{
	245	nextsect = asect->next;
	246	free (asect);
	247	asect = nextsect;
	248	}
326e32d7	249	free (abfd->tdata.cisco_core_data);
f3f29240 JK	250	return NULL;
	251	}
	252	}
	253
	254	char *
	255	cisco_core_file_failing_command (abfd)
	256	bfd *abfd;
	257	{
	258	return NULL;
	259	}
	260
	261	int
	262	cisco_core_file_failing_signal (abfd)
	263	bfd *abfd;
	264	{
	265	return abfd->tdata.cisco_core_data->sig;
	266	}
	267
	268	boolean
	269	cisco_core_file_matches_executable_p (core_bfd, exec_bfd)
	270	bfd *core_bfd;
	271	bfd *exec_bfd;
	272	{
	273	return true;
	274	}
	275	\f
47dc9b52	276	bfd_target cisco_core_vec =
f3f29240 JK	277	{
	278	"trad-core",
	279	bfd_target_unknown_flavour,
	280	true, /* target byte order */
	281	true, /* target headers byte order */
	282	(HAS_RELOC \| EXEC_P \| /* object flags */
	283	HAS_LINENO \| HAS_DEBUG \|
	284	HAS_SYMS \| HAS_LOCALS \| WP_TEXT \| D_PAGED),
	285	(SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* section flags */
	286	0, /* symbol prefix */
	287	' ', /* ar_pad_char */
	288	16, /* ar_max_namelen */
	289	3, /* minimum alignment power */
47dc9b52 JK	290	bfd_getb64, bfd_getb_signed_64, bfd_putb64,
	291	bfd_getb32, bfd_getb_signed_32, bfd_putb32,
	292	bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
	293	bfd_getb64, bfd_getb_signed_64, bfd_putb64,
	294	bfd_getb32, bfd_getb_signed_32, bfd_putb32,
	295	bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
f3f29240 JK	296
	297	{ /* bfd_check_format */
	298	_bfd_dummy_target, /* unknown format */
	299	_bfd_dummy_target, /* object file */
	300	_bfd_dummy_target, /* archive */
	301	cisco_core_file_p /* a core file */
	302	},
	303	{ /* bfd_set_format */
	304	bfd_false, bfd_false,
	305	bfd_false, bfd_false
	306	},
	307	{ /* bfd_write_contents */
	308	bfd_false, bfd_false,
	309	bfd_false, bfd_false
	310	},
	311
6812b607 ILT	312	BFD_JUMP_TABLE_GENERIC (_bfd_generic),
	313	BFD_JUMP_TABLE_COPY (_bfd_generic),
	314	BFD_JUMP_TABLE_CORE (cisco),
	315	BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
	316	BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
	317	BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
	318	BFD_JUMP_TABLE_WRITE (_bfd_generic),
	319	BFD_JUMP_TABLE_LINK (_bfd_nolink),
	320
f3f29240 JK	321	(PTR) 0 /* backend_data */
f3f29240 JK	322	};