gdb/mips-linux-nat.c

   1 /* Native-dependent code for GNU/Linux on MIPS processors.
   2
   3    Copyright 2001, 2002, 2003 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23
  24 /* Pseudo registers can not be read.  ptrace does not provide a way to
  25    read (or set) PS_REGNUM, and there's no point in reading or setting
  26    ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or FCRIR via
  27    ptrace().  */
  28
  29 int
  30 mips_linux_cannot_fetch_register (int regno)
  31 {
  32   if (regno > ZERO_REGNUM && regno < ZERO_REGNUM + 32)
  33     return 0;
  34   else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
  35     return 0;
  36
  37   switch (regno)
  38     {
  39     case LO_REGNUM:
  40     case HI_REGNUM:
  41     case BADVADDR_REGNUM:
  42     case CAUSE_REGNUM:
  43     case PC_REGNUM:
  44     case FCRCS_REGNUM:
  45     case FCRIR_REGNUM:
  46       return 0;
  47     }
  48
  49   return 1;
  50 }
  51
  52 int
  53 mips_linux_cannot_store_register (int regno)
  54 {
  55   if (regno > ZERO_REGNUM && regno < ZERO_REGNUM + 32)
  56     return 0;
  57   else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
  58     return 0;
  59
  60   switch (regno)
  61     {
  62     case LO_REGNUM:
  63     case HI_REGNUM:
  64     case PC_REGNUM:
  65     case FCRCS_REGNUM:
  66       return 0;
  67     }
  68
  69   return 1;
  70 }