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 GDB 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 1, or (at your option)
  11 any later version.
  12
  13 GDB 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 GDB; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  21
  22 #include <stdio.h>
  23 #include <mips/inst.h>
  24 #include "defs.h"
  25 #include "param.h"
  26 #include "frame.h"
  27 #include "inferior.h"
  28 #include "symtab.h"
  29 #include "value.h"
  30
  31 #ifdef USG
  32 #include <sys/types.h>
  33 #endif
  34
  35 #include <sys/param.h>
  36 #include <sys/dir.h>
  37 #include <signal.h>
  38 #include <sys/ioctl.h>
  39 /* #include <fcntl.h>  Can we live without this?  */
  40
  41 #include "gdbcore.h"
  42
  43 #include <sys/user.h>           /* After a.out.h  */
  44 #include <sys/file.h>
  45 #include <sys/stat.h>
  46
  47 /* Get all registers from the inferior */
  48
  49 void
  50 fetch_inferior_registers ()
  51 {
  52   register int regno;
  53   register unsigned int regaddr;
  54   char buf[MAX_REGISTER_RAW_SIZE];
  55   register int i;
  56
  57   registers_fetched ();
  58
  59   for (regno = 1; regno < NUM_REGS; regno++)
  60     {
  61       regaddr = register_addr (regno, 1);
  62       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  63         {
  64           *(int *) &buf[i] = ptrace (3, inferior_pid, regaddr, 0);
  65           regaddr += sizeof (int);
  66         }
  67       supply_register (regno, buf);
  68     }
  69 }
  70
  71 /* Store our register values back into the inferior.
  72    If REGNO is -1, do this for all registers.
  73    Otherwise, REGNO specifies which register (so we can save time).  */
  74
  75 store_inferior_registers (regno)
  76      int regno;
  77 {
  78   register unsigned int regaddr;
  79   char buf[80];
  80
  81   if (regno == 0)
  82     return;
  83
  84   if (regno > 0)
  85     {
  86       regaddr = register_addr (regno, 1);
  87       errno = 0;
  88       ptrace (6, inferior_pid, regaddr, read_register (regno));
  89       if (errno != 0)
  90         {
  91           sprintf (buf, "writing register number %d", regno);
  92           perror_with_name (buf);
  93         }
  94     }
  95   else
  96     {
  97       for (regno = 1; regno < NUM_REGS; regno++)
  98         {
  99           if (regno == 32 || regno == 35 || regno == 36 || regno == 71)
 100             continue;
 101           regaddr = register_addr (regno, 1);
 102           errno = 0;
 103           ptrace (6, inferior_pid, regaddr, read_register (regno));
 104           if (errno != 0)
 105             {
 106               sprintf (buf, "writing all regs, number %d", regno);
 107               perror_with_name (buf);
 108             }
 109         }
 110     }
 111 }
 112
 113 void
 114 fetch_core_registers ()
 115 {
 116   register int regno;
 117   int val;
 118
 119   for (regno = 1; regno < NUM_REGS; regno++) {
 120     char buf[MAX_REGISTER_RAW_SIZE];
 121
 122     val = bfd_seek (core_bfd, register_addr (regno, 0));
 123     if (val < 0 || (val = bfd_read (core_bfd, buf, sizeof buf)) < 0) {
 124       char buffer[50];
 125       strcpy (buffer, "Reading register ");
 126       strcat (buffer, reg_names[regno]);
 127
 128       perror_with_name (buffer);
 129     }
 130     supply_register (regno, buf);
 131   }
 132 }