gdb/mips-xdep.c

   1 /* Low level MIPS interface to ptrace, for GDB when running under Unix.
   2    Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc.
   3    Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
   4    and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
   5
   6 This file is part of GDB.
   7
   8 This program is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2 of the License, or
  11 (at your option) any later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; if not, write to the Free Software
  20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include <stdio.h>
  23 #ifdef sgi
  24 #include <sys/inst.h>
  25 #else
  26 #include <mips/inst.h>
  27 #endif
  28 #include "defs.h"
  29 #include "param.h"
  30 #include "frame.h"
  31 #include "inferior.h"
  32 #include "symtab.h"
  33 #include "value.h"
  34
  35 #ifdef USG
  36 #include <sys/types.h>
  37 #endif
  38
  39 #include <sys/param.h>
  40 #include <sys/dir.h>
  41 #include <signal.h>
  42 #include <sys/ioctl.h>
  43 /* #include <fcntl.h>  Can we live without this?  */
  44
  45 #include "gdbcore.h"
  46
  47 #include <sys/user.h>           /* After a.out.h  */
  48 #include <sys/file.h>
  49 #include <sys/stat.h>
  50
  51 /* For now we stub this out; sgi format is super-hairy (and completely
  52    different in the new release) */
  53
  54 #ifdef sgi
  55 void
  56 fetch_core_registers ()
  57 {
  58   return;
  59 }
  60
  61 void
  62 fetch_inferior_registers ()
  63 {
  64   return;
  65 }
  66
  67 store_inferior_registers (regno)
  68      int regno;
  69 {
  70   return;
  71 }
  72
  73
  74 #else
  75
  76 /* Get all registers from the inferior */
  77
  78 void
  79 fetch_inferior_registers ()
  80 {
  81   register int regno;
  82   register unsigned int regaddr;
  83   char buf[MAX_REGISTER_RAW_SIZE];
  84   register int i;
  85
  86   registers_fetched ();
  87
  88   for (regno = 1; regno < NUM_REGS; regno++)
  89     {
  90       regaddr = register_addr (regno, 1);
  91       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  92         {
  93           *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
  94           regaddr += sizeof (int);
  95         }
  96       supply_register (regno, buf);
  97     }
  98 }
  99
 100 /* Store our register values back into the inferior.
 101    If REGNO is -1, do this for all registers.
 102    Otherwise, REGNO specifies which register (so we can save time).  */
 103
 104 void
 105 store_inferior_registers (regno)
 106      int regno;
 107  {
 108   register unsigned int regaddr;
 109   char buf[80];
 110
 111   if (regno == 0)
 112     return;
 113
 114   if (regno > 0)
 115     {
 116       regaddr = register_addr (regno, 1);
 117       errno = 0;
 118       ptrace (6, inferior_pid, regaddr, read_register (regno));
 119       if (errno != 0)
 120         {
 121           sprintf (buf, "writing register number %d", regno);
 122           perror_with_name (buf);
 123         }
 124     }
 125   else
 126     {
 127       for (regno = 1; regno < NUM_REGS; regno++)
 128         {
 129           if (regno == 32 || regno == 35 || regno == 36 || regno == 71)
 130             continue;
 131           regaddr = register_addr (regno, 1);
 132           errno = 0;
 133           ptrace (6, inferior_pid, regaddr, read_register (regno));
 134           if (errno != 0)
 135             {
 136               sprintf (buf, "writing all regs, number %d", regno);
 137               perror_with_name (buf);
 138             }
 139         }
 140     }
 141 }
 142
 143 #endif /* sgi */
 144
 145 #if 0
 146 void
 147 fetch_core_registers ()
 148 {
 149   register int regno;
 150   int val;
 151
 152   for (regno = 1; regno < NUM_REGS; regno++) {
 153     char buf[MAX_REGISTER_RAW_SIZE];
 154
 155     val = bfd_seek (core_bfd, register_addr (regno, 0));
 156     if (val < 0 || (val = bfd_read (core_bfd, buf, sizeof buf)) < 0) {
 157       char buffer[50];
 158       strcpy (buffer, "Reading register ");
 159       strcat (buffer, reg_names[regno]);
 160
 161       perror_with_name (buffer);
 162     }
 163     supply_register (regno, buf);
 164   }
 165 }
 166 #endif /* 0 */