gdb/umax-xdep.c

   1 /* umax host stuff.
   2    Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "inferior.h"
  24
  25 #include <sys/param.h>
  26 #include <sys/dir.h>
  27 #include <signal.h>
  28 #include <sys/ioctl.h>
  29 #include <fcntl.h>
  30
  31 #include "gdbcore.h"
  32 #include <sys/ptrace.h>
  33 #define PTRACE_ATTACH PT_ATTACH
  34 #define PTRACE_DETACH PT_FREEPROC
  35
  36 #include <sys/file.h>
  37 #include "gdb_stat.h"
  38
  39 /* Work with core dump and executable files, for GDB.
  40    This code would be in corefile.c if it weren't machine-dependent. */
  41
  42 void
  43 core_file_command (char *filename, int from_tty)
  44 {
  45   int val;
  46
  47   /* Discard all vestiges of any previous core file
  48      and mark data and stack spaces as empty.  */
  49
  50   if (corefile)
  51     xfree (corefile);
  52   corefile = 0;
  53
  54   if (corechan >= 0)
  55     close (corechan);
  56   corechan = -1;
  57
  58   data_start = 0;
  59   data_end = 0;
  60   stack_start = STACK_END_ADDR;
  61   stack_end = STACK_END_ADDR;
  62
  63   /* Now, if a new core file was specified, open it and digest it.  */
  64
  65   if (filename)
  66     {
  67       filename = tilde_expand (filename);
  68       make_cleanup (xfree, filename);
  69
  70       if (have_inferior_p ())
  71         error ("To look at a core file, you must kill the program with \"kill\".");
  72       corechan = open (filename, O_RDONLY, 0);
  73       if (corechan < 0)
  74         perror_with_name (filename);
  75       /* 4.2-style (and perhaps also sysV-style) core dump file.  */
  76       {
  77         struct ptrace_user u;
  78         int reg_offset;
  79
  80         val = myread (corechan, &u, sizeof u);
  81         if (val < 0)
  82           perror_with_name (filename);
  83         data_start = exec_data_start;
  84
  85         data_end = data_start + u.pt_dsize;
  86         stack_start = stack_end - u.pt_ssize;
  87         data_offset = sizeof u;
  88         stack_offset = data_offset + u.pt_dsize;
  89         reg_offset = 0;
  90
  91         memcpy (&core_aouthdr, &u.pt_aouthdr, sizeof (AOUTHDR));
  92         printf_unfiltered ("Core file is from \"%s\".\n", u.pt_comm);
  93         if (u.pt_signal > 0)
  94           printf_unfiltered ("Program terminated with signal %d, %s.\n",
  95                              u.pt_signal, safe_strsignal (u.pt_signal));
  96
  97         /* Read the register values out of the core file and store
  98            them where `read_register' will find them.  */
  99
 100         {
 101           register int regno;
 102
 103           for (regno = 0; regno < NUM_REGS; regno++)
 104             {
 105               char buf[MAX_REGISTER_RAW_SIZE];
 106
 107               val = lseek (corechan, register_addr (regno, reg_offset), 0);
 108               if (val < 0)
 109                 perror_with_name (filename);
 110
 111               val = myread (corechan, buf, sizeof buf);
 112               if (val < 0)
 113                 perror_with_name (filename);
 114               supply_register (regno, buf);
 115             }
 116         }
 117       }
 118       if (filename[0] == '/')
 119         corefile = savestring (filename, strlen (filename));
 120       else
 121         {
 122           corefile = concat (current_directory, "/", filename, NULL);
 123         }
 124
 125       flush_cached_frames ();
 126       select_frame (get_current_frame (), 0);
 127       validate_files ();
 128     }
 129   else if (from_tty)
 130     printf_unfiltered ("No core file now.\n");
 131 }