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/* BFD back-end for HPPA BSD core files.

   Copyright 1993, 94, 95, 97, 1998 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

   Written by the Center for Software Science at the University of Utah

   and by Cygnus Support.

   The core file structure for the Utah 4.3BSD and OSF1 ports on the

   PA is a mix between traditional cores and hpux cores -- just

   different enough that supporting this format would tend to add

   gross hacks to trad-core.c or hpux-core.c.  So instead we keep any

   gross hacks isolated to this file.  */

/* This file can only be compiled on systems which use HPPA-BSD style

   core files.

   I would not expect this to be of use to any other host/target, but

   you never know.  */

#include "bfd.h"

#include "sysdep.h"

#include "libbfd.h"

#if defined (HOST_HPPABSD)

#include "machine/vmparam.h"

#include <sys/param.h>

#include <sys/dir.h>

#include <signal.h>

#include <machine/reg.h>

#include <sys/user.h>           /* After a.out.h  */

#include <sys/file.h>

static asection *make_bfd_asection PARAMS ((bfd *, CONST char *,

                                            flagword, bfd_size_type,

                                            file_ptr, unsigned int));

static asymbol *hppabsd_core_make_empty_symbol PARAMS ((bfd *));

static const bfd_target *hppabsd_core_core_file_p PARAMS ((bfd *));

static char *hppabsd_core_core_file_failing_command PARAMS ((bfd *));

static int hppabsd_core_core_file_failing_signal PARAMS ((bfd *));

static boolean hppabsd_core_core_file_matches_executable_p

  PARAMS ((bfd *, bfd *));

static void swap_abort PARAMS ((void));

/* These are stored in the bfd's tdata.  */

struct hppabsd_core_struct

  {

    int sig;

    char cmd[MAXCOMLEN + 1];

    asection *data_section;

    asection *stack_section;

    asection *reg_section;

  };

#define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data)

#define core_signal(bfd) (core_hdr(bfd)->sig)

#define core_command(bfd) (core_hdr(bfd)->cmd)

#define core_datasec(bfd) (core_hdr(bfd)->data_section)

#define core_stacksec(bfd) (core_hdr(bfd)->stack_section)

#define core_regsec(bfd) (core_hdr(bfd)->reg_section)

static asection *

make_bfd_asection (abfd, name, flags, _raw_size, offset, alignment_power)

     bfd *abfd;

     CONST char *name;

     flagword flags;

     bfd_size_type _raw_size;

     file_ptr offset;

     unsigned int alignment_power;

{

  asection *asect;

  asect = bfd_make_section (abfd, name);

  if (!asect)

    return NULL;

  asect->flags = flags;

  asect->_raw_size = _raw_size;

  asect->filepos = offset;

  asect->alignment_power = alignment_power;

  return asect;

}

static asymbol *

hppabsd_core_make_empty_symbol (abfd)

     bfd *abfd;

{

  asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));

  if (new)

    new->the_bfd = abfd;

  return new;

}

static const bfd_target *

hppabsd_core_core_file_p (abfd)

     bfd *abfd;

{

  int val;

  struct user u;

  struct hppabsd_core_struct *coredata;

  int clicksz;

  /* Try to read in the u-area.  We will need information from this

     to know how to grok the rest of the core structures.  */

  val = bfd_read ((void *) &u, 1, sizeof u, abfd);

  if (val != sizeof u)

    {

      if (bfd_get_error () != bfd_error_system_call)

        bfd_set_error (bfd_error_wrong_format);

      return NULL;

    }

  /* Get the page size out of the u structure.  This will be different

     for PA 1.0 machines and PA 1.1 machines.   Yuk!  */

  clicksz = u.u_pcb.pcb_pgsz;

  /* clicksz must be a power of two >= 2k.  */

  if (clicksz < 0x800

      || clicksz != (clicksz & -clicksz))

    {

      bfd_set_error (bfd_error_wrong_format);

      return NULL;

    }

  /* Sanity checks.  Make sure the size of the core file matches the

     the size computed from information within the core itself.  */

  {

    FILE *stream = bfd_cache_lookup (abfd);

    struct stat statbuf;

    if (stream == NULL || fstat (fileno (stream), &statbuf) < 0)

      {

        bfd_set_error (bfd_error_system_call);

        return NULL;

      }

    if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)

      {

        bfd_set_error (bfd_error_file_truncated);

        return NULL;

      }

    if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size)

      {

        /* The file is too big.  Maybe it's not a core file

           or we otherwise have bad values for u_dsize and u_ssize).  */

        bfd_set_error (bfd_error_wrong_format);

        return NULL;

      }

  }

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

  coredata = (struct hppabsd_core_struct *)

    bfd_zalloc (abfd, sizeof (struct hppabsd_core_struct));

  if (!coredata)

    return NULL;

  /* Make the core data and available via the tdata part of the BFD.  */

  abfd->tdata.hppabsd_core_data = coredata;

  /* Create the sections.  */

  core_stacksec (abfd) = make_bfd_asection (abfd, ".stack",

                                           SEC_ALLOC + SEC_HAS_CONTENTS,

                                           clicksz * u.u_ssize,

                                           NBPG * (USIZE + KSTAKSIZE)

                                             + clicksz * u.u_dsize, 2);

  core_stacksec (abfd)->vma = USRSTACK;

  core_datasec (abfd) = make_bfd_asection (abfd, ".data",

                                          SEC_ALLOC + SEC_LOAD

                                            + SEC_HAS_CONTENTS,

                                          clicksz * u.u_dsize,

                                          NBPG * (USIZE + KSTAKSIZE), 2);

  core_datasec (abfd)->vma = UDATASEG;

  core_regsec (abfd) = make_bfd_asection (abfd, ".reg",

                                         SEC_HAS_CONTENTS,

                                         KSTAKSIZE * NBPG,

                                         NBPG * USIZE, 2);

  core_regsec (abfd)->vma = 0;

  strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1);

  core_signal (abfd) = u.u_code;

  return abfd->xvec;

}

static char *

hppabsd_core_core_file_failing_command (abfd)

     bfd *abfd;

{

  return core_command (abfd);

}

/* ARGSUSED */

static int

hppabsd_core_core_file_failing_signal (abfd)

     bfd *abfd;

{

  return core_signal (abfd);

}

/* ARGSUSED */

static boolean

hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd)

     bfd *core_bfd, *exec_bfd;

{

  /* There's no way to know this...  */

  return true;

}

#define hppabsd_core_get_symtab_upper_bound \

  _bfd_nosymbols_get_symtab_upper_bound

#define hppabsd_core_get_symtab _bfd_nosymbols_get_symtab

#define hppabsd_core_print_symbol _bfd_nosymbols_print_symbol

#define hppabsd_core_get_symbol_info _bfd_nosymbols_get_symbol_info

#define hppabsd_core_bfd_is_local_label_name \

  _bfd_nosymbols_bfd_is_local_label_name

#define hppabsd_core_get_lineno _bfd_nosymbols_get_lineno

#define hppabsd_core_find_nearest_line _bfd_nosymbols_find_nearest_line

#define hppabsd_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol

#define hppabsd_core_read_minisymbols _bfd_nosymbols_read_minisymbols

#define hppabsd_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol

/* If somebody calls any byte-swapping routines, shoot them.  */

static void

swap_abort ()

{

  /* This way doesn't require any declaration for ANSI to fuck up.  */

  abort ();

}

#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 hppabsd_core_vec =

  {

    "hppabsd-core",

    bfd_target_unknown_flavour,

    BFD_ENDIAN_BIG,             /* target byte order */

    BFD_ENDIAN_BIG,             /* 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 */

     hppabsd_core_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 (hppabsd_core),

       BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),

       BFD_JUMP_TABLE_SYMBOLS (hppabsd_core),

       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