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/* umax host stuff.

   Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.

   This file is part of GDB.

   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.  */

#include "defs.h"

#include "frame.h"

#include "inferior.h"

#include <sys/param.h>

#include <sys/dir.h>

#include <signal.h>

#include <sys/ioctl.h>

#include <fcntl.h>

#include "gdbcore.h"

#include <sys/ptrace.h>

#define PTRACE_ATTACH PT_ATTACH

#define PTRACE_DETACH PT_FREEPROC

#include <sys/file.h>

#include "gdb_stat.h"

/* Work with core dump and executable files, for GDB.

   This code would be in corefile.c if it weren't machine-dependent. */

void

core_file_command (filename, from_tty)

     char *filename;

     int from_tty;

{

  int val;

  /* Discard all vestiges of any previous core file

     and mark data and stack spaces as empty.  */

  if (corefile)

    free (corefile);

  corefile = 0;

  if (corechan >= 0)

    close (corechan);

  corechan = -1;

  data_start = 0;

  data_end = 0;

  stack_start = STACK_END_ADDR;

  stack_end = STACK_END_ADDR;

  /* Now, if a new core file was specified, open it and digest it.  */

  if (filename)

    {

      filename = tilde_expand (filename);

      make_cleanup (free, filename);

      if (have_inferior_p ())

        error ("To look at a core file, you must kill the program with \"kill\".");

      corechan = open (filename, O_RDONLY, 0);

      if (corechan < 0)

        perror_with_name (filename);

      /* 4.2-style (and perhaps also sysV-style) core dump file.  */

      {

        struct ptrace_user u;

        int reg_offset;

        val = myread (corechan, &u, sizeof u);

        if (val < 0)

          perror_with_name (filename);

        data_start = exec_data_start;

        data_end = data_start + u.pt_dsize;

        stack_start = stack_end - u.pt_ssize;

        data_offset = sizeof u;

        stack_offset = data_offset + u.pt_dsize;

        reg_offset = 0;

        memcpy (&core_aouthdr, &u.pt_aouthdr, sizeof (AOUTHDR));

        printf_unfiltered ("Core file is from \"%s\".\n", u.pt_comm);

        if (u.pt_signal > 0)

          printf_unfiltered ("Program terminated with signal %d, %s.\n",

                             u.pt_signal, safe_strsignal (u.pt_signal));

        /* Read the register values out of the core file and store

           them where `read_register' will find them.  */

        {

          register int regno;

          for (regno = 0; regno < NUM_REGS; regno++)

            {

              char buf[MAX_REGISTER_RAW_SIZE];

              val = lseek (corechan, register_addr (regno, reg_offset), 0);

              if (val < 0)

                perror_with_name (filename);

              val = myread (corechan, buf, sizeof buf);

              if (val < 0)

                perror_with_name (filename);

              supply_register (regno, buf);

            }

        }

      }

      if (filename[0] == '/')

        corefile = savestring (filename, strlen (filename));

      else

        {

          corefile = concat (current_directory, "/", filename, NULL);

        }

      flush_cached_frames ();

      select_frame (get_current_frame (), 0);

      validate_files ();

    }

  else if (from_tty)

    printf_unfiltered ("No core file now.\n");

}