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

/* BFD backend for core files which use the ptrace_user structure
   Copyright 1993 Free Software Foundation, Inc.
   The structure of this file is based on trad-core.c written by John Gilmore
   of Cygnus Support.
   Modified to work with the ptrace_user structure by Kevin A. Buettner.
   (Longterm it may be better to merge this file with trad-core.c)

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.

   To use this file on a particular host, configure the host with these
   parameters in the config/h-HOST file:

	HDEFINES=-DPTRACE_CORE
	HDEPFILES=ptrace-core.o

*/

#ifdef PTRACE_CORE

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"

#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ptrace.h>


struct trad_core_struct
  {
    asection *data_section;
    asection *stack_section;
    asection *reg_section;
    struct ptrace_user u;
  } *rawptr;

#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)

/* forward declarations */

bfd_target *	ptrace_unix_core_file_p PARAMS ((bfd *abfd));
char *		ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
int		ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
boolean		ptrace_unix_core_file_matches_executable_p
			 PARAMS ((bfd *core_bfd, bfd *exec_bfd));

/* ARGSUSED */
bfd_target *
ptrace_unix_core_file_p (abfd)
     bfd *abfd;

{
  int val;
  struct ptrace_user u;

  val = bfd_read ((void *)&u, 1, sizeof u, abfd);
  if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC 
      || u.pt_rev != _BCS_PTRACE_REV)
    {
      /* Too small to be a core file */
      bfd_set_error (bfd_error_wrong_format);
      return 0;
    }

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

  /* Allocate both the upage and the struct core_data at once, so
     a single free() will free them both.  */
  rawptr = (struct trad_core_struct *)
		bfd_zalloc (abfd, sizeof (struct trad_core_struct));

  if (rawptr == NULL) {
    bfd_set_error (bfd_error_no_memory);
    return 0;
  }
  
  abfd->tdata.trad_core_data = rawptr;

  rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */

  /* Create the sections.  This is raunchy, but bfd_close wants to free
     them separately.  */

  core_stacksec(abfd) = (asection *) bfd_zmalloc (sizeof (asection));
  if (core_stacksec (abfd) == NULL) {
  loser:
    bfd_set_error (bfd_error_no_memory);
    free ((void *)rawptr);
    return 0;
  }
  core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
  if (core_datasec (abfd) == NULL) {
  loser1:
    free ((void *)core_stacksec (abfd));
    goto loser;
  }
  core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
  if (core_regsec (abfd) == NULL) {
    free ((void *)core_datasec (abfd));
    goto loser1;
  }

  core_stacksec (abfd)->name = ".stack";
  core_datasec (abfd)->name = ".data";
  core_regsec (abfd)->name = ".reg";

  /* FIXME:  Need to worry about shared memory, library data, and library
     text.  I don't think that any of these things are supported on the
     system on which I am developing this for though. */


  core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
  core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
  core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;

  core_datasec (abfd)->_raw_size =  u.pt_dsize;
  core_stacksec (abfd)->_raw_size = u.pt_ssize;
  core_regsec (abfd)->_raw_size = sizeof(u);

  core_datasec (abfd)->vma = u.pt_o_data_start;
  core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
  core_regsec (abfd)->vma = 0 - sizeof(u);	/* see trad-core.c */

  core_datasec (abfd)->filepos = (int) u.pt_dataptr;
  core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
  core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */

  /* Align to word at least */
  core_stacksec (abfd)->alignment_power = 2;
  core_datasec (abfd)->alignment_power = 2;
  core_regsec (abfd)->alignment_power = 2;

  abfd->sections = core_stacksec (abfd);
  core_stacksec (abfd)->next = core_datasec (abfd);
  core_datasec (abfd)->next = core_regsec (abfd);
  abfd->section_count = 3;

  return abfd->xvec;
}

char *
ptrace_unix_core_file_failing_command (abfd)
     bfd *abfd;
{
  char *com = abfd->tdata.trad_core_data->u.pt_comm;
  if (*com)
    return com;
  else
    return 0;
}

/* ARGSUSED */
int
ptrace_unix_core_file_failing_signal (abfd)
     bfd *abfd;
{
  return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
}

/* ARGSUSED */
boolean
ptrace_unix_core_file_matches_executable_p  (core_bfd, exec_bfd)
     bfd *core_bfd, *exec_bfd;
{
  /* FIXME: Use pt_timdat field of the ptrace_user structure to match 
     the date of the executable */
  return true;
}
\f
/* If somebody calls any byte-swapping routines, shoot them.  */
void
swap_abort()
{
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define	NO_GET	((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
#define	NO_PUT	((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
#define	NO_SIGNED_GET \
  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )

bfd_target ptrace_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 */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit hdrs */

    {				/* bfd_check_format */
     _bfd_dummy_target,		/* unknown format */
     _bfd_dummy_target,		/* object file */
     _bfd_dummy_target,		/* archive */
     ptrace_unix_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 (ptrace_unix),
       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 */
};

#endif /* PTRACE_CORE */
Commit	Line	Data
4c3721d5 ILT	1	/* BFD backend for core files which use the ptrace_user structure
	2	Copyright 1993 Free Software Foundation, Inc.
	3	The structure of this file is based on trad-core.c written by John Gilmore
	4	of Cygnus Support.
	5	Modified to work with the ptrace_user structure by Kevin A. Buettner.
	6	(Longterm it may be better to merge this file with trad-core.c)
	7
	8	This file is part of BFD, the Binary File Descriptor library.
	9
	10	This program is free software; you can redistribute it and/or modify
	11	it under the terms of the GNU General Public License as published by
	12	the Free Software Foundation; either version 2 of the License, or
	13	(at your option) any later version.
	14
	15	This program is distributed in the hope that it will be useful,
	16	but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	GNU General Public License for more details.
	19
	20	You should have received a copy of the GNU General Public License
	21	along with this program; if not, write to the Free Software
	22	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	23
	24	To use this file on a particular host, configure the host with these
	25	parameters in the config/h-HOST file:
	26
	27	HDEFINES=-DPTRACE_CORE
	28	HDEPFILES=ptrace-core.o
	29
	30	*/
	31
	32	#ifdef PTRACE_CORE
	33
	34	#include "bfd.h"
	35	#include "sysdep.h"
	36	#include "libbfd.h"
	37
	38	#include <stdio.h>
	39	#include <sys/types.h>
	40	#include <sys/param.h>
	41	#include <sys/dir.h>
	42	#include <signal.h>
	43	#include <errno.h>
	44	#include <unistd.h>
	45	#include <sys/ptrace.h>
	46
	47
	48	struct trad_core_struct
	49	{
	50	asection *data_section;
	51	asection *stack_section;
	52	asection *reg_section;
	53	struct ptrace_user u;
	54	} *rawptr;
	55
	56	#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
	57	#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
	58	#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
	59	#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
	60
	61	/* forward declarations */
	62
	63	bfd_target * ptrace_unix_core_file_p PARAMS ((bfd *abfd));
	64	char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
65	int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
66	boolean ptrace_unix_core_file_matches_executable_p
67	PARAMS ((bfd core_bfd, bfd exec_bfd));
68
69	/* ARGSUSED */
70	bfd_target *
71	ptrace_unix_core_file_p (abfd)
72	bfd *abfd;
73
74	{
75	int val;
76	struct ptrace_user u;
77
78	val = bfd_read ((void *)&u, 1, sizeof u, abfd);
79	if (val != sizeof u \|\| u.pt_magic != _BCS_PTRACE_MAGIC
80	\|\| u.pt_rev != _BCS_PTRACE_REV)
81	{
82	/* Too small to be a core file */
326e32d7	83	bfd_set_error (bfd_error_wrong_format);
4c3721d5 ILT	84	return 0;
	85	}
	86
	87	/* OK, we believe you. You're a core file (sure, sure). */
	88
	89	/* Allocate both the upage and the struct core_data at once, so
	90	a single free() will free them both. */
	91	rawptr = (struct trad_core_struct *)
	92	bfd_zalloc (abfd, sizeof (struct trad_core_struct));
	93
	94	if (rawptr == NULL) {
326e32d7	95	bfd_set_error (bfd_error_no_memory);
4c3721d5 ILT	96	return 0;
	97	}
	98
	99	abfd->tdata.trad_core_data = rawptr;
	100
	101	rawptr->u = u; /Copy the uarea into the tdata part of the bfd /
	102
	103	/* Create the sections. This is raunchy, but bfd_close wants to free
	104	them separately. */
	105
326e32d7	106	core_stacksec(abfd) = (asection *) bfd_zmalloc (sizeof (asection));
4c3721d5 ILT	107	if (core_stacksec (abfd) == NULL) {
4c3721d5 ILT	108	loser:
326e32d7	109	bfd_set_error (bfd_error_no_memory);
4c3721d5 ILT	110	free ((void *)rawptr);
	111	return 0;
	112	}
	113	core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
	114	if (core_datasec (abfd) == NULL) {
	115	loser1:
	116	free ((void *)core_stacksec (abfd));
	117	goto loser;
	118	}
	119	core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
	120	if (core_regsec (abfd) == NULL) {
	121	free ((void *)core_datasec (abfd));
	122	goto loser1;
	123	}
	124
	125	core_stacksec (abfd)->name = ".stack";
	126	core_datasec (abfd)->name = ".data";
	127	core_regsec (abfd)->name = ".reg";
	128
	129	/* FIXME: Need to worry about shared memory, library data, and library
	130	text. I don't think that any of these things are supported on the
	131	system on which I am developing this for though. */
	132
	133
	134	core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	135	core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	136	core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
	137
	138	core_datasec (abfd)->_raw_size = u.pt_dsize;
	139	core_stacksec (abfd)->_raw_size = u.pt_ssize;
	140	core_regsec (abfd)->_raw_size = sizeof(u);
	141
	142	core_datasec (abfd)->vma = u.pt_o_data_start;
	143	core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
	144	core_regsec (abfd)->vma = 0 - sizeof(u); /* see trad-core.c */
	145
	146	core_datasec (abfd)->filepos = (int) u.pt_dataptr;
	147	core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
	148	core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
	149
	150	/* Align to word at least */
	151	core_stacksec (abfd)->alignment_power = 2;
	152	core_datasec (abfd)->alignment_power = 2;
	153	core_regsec (abfd)->alignment_power = 2;
	154
	155	abfd->sections = core_stacksec (abfd);
	156	core_stacksec (abfd)->next = core_datasec (abfd);
	157	core_datasec (abfd)->next = core_regsec (abfd);
	158	abfd->section_count = 3;
	159
	160	return abfd->xvec;
	161	}
	162
	163	char *
	164	ptrace_unix_core_file_failing_command (abfd)
	165	bfd *abfd;
	166	{
	167	char *com = abfd->tdata.trad_core_data->u.pt_comm;
	168	if (*com)
	169	return com;
	170	else
	171	return 0;
	172	}
	173
174	/* ARGSUSED */
175	int
176	ptrace_unix_core_file_failing_signal (abfd)
177	bfd *abfd;
178	{
179	return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
180	}
181
182	/* ARGSUSED */
183	boolean
184	ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
185	bfd core_bfd, exec_bfd;
186	{
187	/* FIXME: Use pt_timdat field of the ptrace_user structure to match
188	the date of the executable */
189	return true;
190	}
191	\f
4c3721d5 ILT	192	/* If somebody calls any byte-swapping routines, shoot them. */
	193	void
	194	swap_abort()
	195	{
	196	abort(); /* This way doesn't require any declaration for ANSI to fuck up */
	197	}
326e32d7	198	#define NO_GET ((bfd_vma () PARAMS (( const bfd_byte ))) swap_abort )
4c3721d5	199	#define NO_PUT ((void () PARAMS ((bfd_vma, bfd_byte ))) swap_abort )
326e32d7 ILT	200	#define NO_SIGNED_GET \
326e32d7 ILT	201	((bfd_signed_vma () PARAMS ((const bfd_byte ))) swap_abort )
4c3721d5 ILT	202
	203	bfd_target ptrace_core_vec =
	204	{
	205	"trad-core",
	206	bfd_target_unknown_flavour,
	207	true, /* target byte order */
	208	true, /* target headers byte order */
	209	(HAS_RELOC \| EXEC_P \| /* object flags */
	210	HAS_LINENO \| HAS_DEBUG \|
	211	HAS_SYMS \| HAS_LOCALS \| WP_TEXT \| D_PAGED),
	212	(SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* section flags */
	213	0, /* symbol prefix */
	214	' ', /* ar_pad_char */
	215	16, /* ar_max_namelen */
	216	3, /* minimum alignment power */
	217	NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
	218	NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
	219	NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
	220	NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
	221	NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
	222	NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
	223
	224	{ /* bfd_check_format */
	225	_bfd_dummy_target, /* unknown format */
	226	_bfd_dummy_target, /* object file */
	227	_bfd_dummy_target, /* archive */
	228	ptrace_unix_core_file_p /* a core file */
	229	},
	230	{ /* bfd_set_format */
	231	bfd_false, bfd_false,
	232	bfd_false, bfd_false
	233	},
	234	{ /* bfd_write_contents */
	235	bfd_false, bfd_false,
	236	bfd_false, bfd_false
	237	},
	238
6812b607 ILT	239	BFD_JUMP_TABLE_GENERIC (_bfd_generic),
	240	BFD_JUMP_TABLE_COPY (_bfd_generic),
	241	BFD_JUMP_TABLE_CORE (ptrace_unix),
	242	BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
	243	BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
	244	BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
	245	BFD_JUMP_TABLE_WRITE (_bfd_generic),
	246	BFD_JUMP_TABLE_LINK (_bfd_nolink),
	247
4c3721d5 ILT	248	(PTR) 0 /* backend_data */
	249	};
	250
	251	#endif /* PTRACE_CORE */