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 #include "mips-tdep.h"
  24
  25 /* Pseudo registers can not be read.  ptrace does not provide a way to
  26    read (or set) MIPS_PS_REGNUM, and there's no point in reading or
  27    setting MIPS_ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or
  28    FCRIR via ptrace().  */
  29
  30 int
  31 mips_linux_cannot_fetch_register (int regno)
  32 {
  33   if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
  34     return 0;
  35   else if (regno >= mips_regnum (current_gdbarch)->fp0
  36            && regno <= mips_regnum (current_gdbarch)->fp0 + 32)
  37     return 0;
  38   else if (regno == mips_regnum (current_gdbarch)->lo
  39            || regno == mips_regnum (current_gdbarch)->hi
  40            || regno == mips_regnum (current_gdbarch)->badvaddr
  41            || regno == mips_regnum (current_gdbarch)->cause
  42            || regno == mips_regnum (current_gdbarch)->pc
  43            || regno == mips_regnum (current_gdbarch)->fp_control_status
  44            || regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
  45     return 0;
  46   else
  47     return 1;
  48 }
  49
  50 int
  51 mips_linux_cannot_store_register (int regno)
  52 {
  53   if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
  54     return 0;
  55   else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
  56     return 0;
  57   else if (regno == mips_regnum (current_gdbarch)->lo
  58            || regno == mips_regnum (current_gdbarch)->hi
  59            || regno == mips_regnum (current_gdbarch)->pc
  60            || regno == mips_regnum (current_gdbarch)->fp_control_status)
  61     return 0;
  62   else
  63     return 1;
  64 }