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

/* BFD backend for core files which use the ptrace_user structure
   Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#ifdef PTRACE_CORE

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

#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <sys/ptrace.h>

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

#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 */

const 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));
bfd_boolean ptrace_unix_core_file_matches_executable_p
  PARAMS ((bfd *core_bfd, bfd *exec_bfd));
static void swap_abort PARAMS ((void));

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

{
  int val;
  struct ptrace_user u;
  struct trad_core_struct *rawptr;
  bfd_size_type amt;

  val = bfd_bread ((void *)&u, (bfd_size_type) 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.  */
  amt = sizeof (struct trad_core_struct);
  rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt);

  if (rawptr == NULL)
    return 0;

  abfd->tdata.trad_core_data = rawptr;

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

  /* Create the sections.  */

  core_stacksec (abfd) = bfd_make_section_anyway (abfd, ".stack");
  if (core_stacksec (abfd) == NULL)
    goto fail;
  core_datasec (abfd) = bfd_make_section_anyway (abfd, ".data");
  if (core_datasec (abfd) == NULL)
    goto fail;
  core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg");
  if (core_regsec (abfd) == NULL)
    goto fail;

  /* 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_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;

  return abfd->xvec;

 fail:
  bfd_release (abfd, abfd->tdata.any);
  abfd->tdata.any = NULL;
  bfd_section_list_clear (abfd);
  return NULL;
}

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 */
bfd_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.  */
static 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 )

const bfd_target ptrace_core_vec =
  {
    "trad-core",
    bfd_target_unknown_flavour,
    BFD_ENDIAN_UNKNOWN,		/* target byte order */
    BFD_ENDIAN_UNKNOWN,		/* 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 */
    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),
       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

    NULL,

    (PTR) 0			/* backend_data */
};

#endif /* PTRACE_CORE */
Commit	Line	Data
252b5132	1	/* BFD backend for core files which use the ptrace_user structure
9e7b37b3	2	Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002
7898deda	3	Free Software Foundation, Inc.
252b5132 RH	4	The structure of this file is based on trad-core.c written by John Gilmore
	5	of Cygnus Support.
	6	Modified to work with the ptrace_user structure by Kevin A. Buettner.
	7	(Longterm it may be better to merge this file with trad-core.c)
	8
	9	This file is part of BFD, the Binary File Descriptor library.
	10
	11	This program is free software; you can redistribute it and/or modify
	12	it under the terms of the GNU General Public License as published by
	13	the Free Software Foundation; either version 2 of the License, or
	14	(at your option) any later version.
	15
	16	This program is distributed in the hope that it will be useful,
	17	but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	GNU General Public License for more details.
	20
	21	You should have received a copy of the GNU General Public License
	22	along with this program; if not, write to the Free Software
	23	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	24
	25	#ifdef PTRACE_CORE
	26
	27	#include "bfd.h"
	28	#include "sysdep.h"
	29	#include "libbfd.h"
	30
	31	#include <sys/param.h>
	32	#include <sys/dir.h>
	33	#include <signal.h>
	34	#include <sys/ptrace.h>
	35
252b5132 RH	36	struct trad_core_struct
	37	{
	38	asection *data_section;
	39	asection *stack_section;
	40	asection *reg_section;
	41	struct ptrace_user u;
	42	};
	43
	44	#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
	45	#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
	46	#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
	47	#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
	48
	49	/* forward declarations */
	50
	51	const bfd_target ptrace_unix_core_file_p PARAMS ((bfd abfd));
b34976b6 AM	52	char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
	53	int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
	54	bfd_boolean ptrace_unix_core_file_matches_executable_p
	55	PARAMS ((bfd core_bfd, bfd exec_bfd));
	56	static void swap_abort PARAMS ((void));
252b5132 RH	57
	58	/* ARGSUSED */
	59	const bfd_target *
	60	ptrace_unix_core_file_p (abfd)
	61	bfd *abfd;
	62
	63	{
	64	int val;
	65	struct ptrace_user u;
	66	struct trad_core_struct *rawptr;
dc810e39	67	bfd_size_type amt;
252b5132	68
dc810e39	69	val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd);
892339ee	70	if (val != sizeof u \|\| u.pt_magic != _BCS_PTRACE_MAGIC
252b5132 RH	71	\|\| u.pt_rev != _BCS_PTRACE_REV)
	72	{
	73	/* Too small to be a core file */
	74	bfd_set_error (bfd_error_wrong_format);
	75	return 0;
	76	}
	77
	78	/* OK, we believe you. You're a core file (sure, sure). */
	79
	80	/* Allocate both the upage and the struct core_data at once, so
	81	a single free() will free them both. */
dc810e39 AM	82	amt = sizeof (struct trad_core_struct);
dc810e39 AM	83	rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt);
252b5132 RH	84
	85	if (rawptr == NULL)
	86	return 0;
892339ee	87
252b5132 RH	88	abfd->tdata.trad_core_data = rawptr;
	89
	90	rawptr->u = u; /Copy the uarea into the tdata part of the bfd /
	91
9e7b37b3	92	/* Create the sections. */
252b5132	93
9e7b37b3	94	core_stacksec (abfd) = bfd_make_section_anyway (abfd, ".stack");
252b5132	95	if (core_stacksec (abfd) == NULL)
9e7b37b3 AM	96	goto fail;
9e7b37b3 AM	97	core_datasec (abfd) = bfd_make_section_anyway (abfd, ".data");
252b5132	98	if (core_datasec (abfd) == NULL)
9e7b37b3 AM	99	goto fail;
9e7b37b3 AM	100	core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg");
252b5132	101	if (core_regsec (abfd) == NULL)
9e7b37b3	102	goto fail;
252b5132 RH	103
	104	/* FIXME: Need to worry about shared memory, library data, and library
	105	text. I don't think that any of these things are supported on the
892339ee	106	system on which I am developing this for though. */
252b5132 RH	107
	108	core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	109	core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
	110	core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
	111
	112	core_datasec (abfd)->_raw_size = u.pt_dsize;
	113	core_stacksec (abfd)->_raw_size = u.pt_ssize;
892339ee	114	core_regsec (abfd)->_raw_size = sizeof (u);
252b5132 RH	115
	116	core_datasec (abfd)->vma = u.pt_o_data_start;
	117	core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
892339ee	118	core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */
252b5132 RH	119
	120	core_datasec (abfd)->filepos = (int) u.pt_dataptr;
	121	core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
	122	core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
	123
	124	/* Align to word at least */
	125	core_stacksec (abfd)->alignment_power = 2;
	126	core_datasec (abfd)->alignment_power = 2;
	127	core_regsec (abfd)->alignment_power = 2;
	128
252b5132	129	return abfd->xvec;
9e7b37b3 AM	130
	131	fail:
	132	bfd_release (abfd, abfd->tdata.any);
	133	abfd->tdata.any = NULL;
	134	bfd_section_list_clear (abfd);
	135	return NULL;
252b5132 RH	136	}
	137
	138	char *
	139	ptrace_unix_core_file_failing_command (abfd)
	140	bfd *abfd;
	141	{
	142	char *com = abfd->tdata.trad_core_data->u.pt_comm;
	143	if (*com)
	144	return com;
	145	else
	146	return 0;
	147	}
	148
	149	/* ARGSUSED */
	150	int
	151	ptrace_unix_core_file_failing_signal (abfd)
	152	bfd *abfd;
	153	{
	154	return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
	155	}
	156
	157	/* ARGSUSED */
b34976b6	158	bfd_boolean
252b5132 RH	159	ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
	160	bfd core_bfd, exec_bfd;
	161	{
892339ee	162	/* FIXME: Use pt_timdat field of the ptrace_user structure to match
252b5132	163	the date of the executable */
b34976b6	164	return TRUE;
252b5132 RH	165	}
	166	\f
	167	/* If somebody calls any byte-swapping routines, shoot them. */
	168	static void
892339ee	169	swap_abort ()
252b5132	170	{
892339ee	171	abort (); /* This way doesn't require any declaration for ANSI to fuck up */
252b5132 RH	172	}
	173	#define NO_GET ((bfd_vma () PARAMS (( const bfd_byte ))) swap_abort )
	174	#define NO_PUT ((void () PARAMS ((bfd_vma, bfd_byte ))) swap_abort )
	175	#define NO_SIGNED_GET \
	176	((bfd_signed_vma () PARAMS ((const bfd_byte ))) swap_abort )
	177
	178	const bfd_target ptrace_core_vec =
	179	{
	180	"trad-core",
	181	bfd_target_unknown_flavour,
	182	BFD_ENDIAN_UNKNOWN, /* target byte order */
	183	BFD_ENDIAN_UNKNOWN, /* target headers byte order */
	184	(HAS_RELOC \| EXEC_P \| /* object flags */
	185	HAS_LINENO \| HAS_DEBUG \|
	186	HAS_SYMS \| HAS_LOCALS \| WP_TEXT \| D_PAGED),
	187	(SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* section flags */
	188	0, /* symbol prefix */
	189	' ', /* ar_pad_char */
	190	16, /* ar_max_namelen */
	191	NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
	192	NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
	193	NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
	194	NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
	195	NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
	196	NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
	197
	198	{ /* bfd_check_format */
	199	_bfd_dummy_target, /* unknown format */
	200	_bfd_dummy_target, /* object file */
	201	_bfd_dummy_target, /* archive */
	202	ptrace_unix_core_file_p /* a core file */
	203	},
	204	{ /* bfd_set_format */
	205	bfd_false, bfd_false,
	206	bfd_false, bfd_false
	207	},
	208	{ /* bfd_write_contents */
	209	bfd_false, bfd_false,
	210	bfd_false, bfd_false
	211	},
892339ee	212
252b5132 RH	213	BFD_JUMP_TABLE_GENERIC (_bfd_generic),
	214	BFD_JUMP_TABLE_COPY (_bfd_generic),
	215	BFD_JUMP_TABLE_CORE (ptrace_unix),
	216	BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
	217	BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
	218	BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
	219	BFD_JUMP_TABLE_WRITE (_bfd_generic),
	220	BFD_JUMP_TABLE_LINK (_bfd_nolink),
	221	BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
	222
c3c89269	223	NULL,
892339ee	224
252b5132 RH	225	(PTR) 0 /* backend_data */
	226	};
	227
	228	#endif /* PTRACE_CORE */