gdb/mips-linux-nat.c

   1 /* Native-dependent code for GNU/Linux on MIPS processors.
   2
   3    Copyright (C) 2001, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "defs.h"
  23 #include "mips-tdep.h"
  24 #include "target.h"
  25 #include "linux-nat.h"
  26
  27 /* Pseudo registers can not be read.  ptrace does not provide a way to
  28    read (or set) MIPS_PS_REGNUM, and there's no point in reading or
  29    setting MIPS_ZERO_REGNUM.  We also can not set BADVADDR, CAUSE, or
  30    FCRIR via ptrace().  */
  31
  32 int
  33 mips_linux_cannot_fetch_register (int regno)
  34 {
  35   if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
  36     return 0;
  37   else if (regno >= mips_regnum (current_gdbarch)->fp0
  38            && regno <= mips_regnum (current_gdbarch)->fp0 + 32)
  39     return 0;
  40   else if (regno == mips_regnum (current_gdbarch)->lo
  41            || regno == mips_regnum (current_gdbarch)->hi
  42            || regno == mips_regnum (current_gdbarch)->badvaddr
  43            || regno == mips_regnum (current_gdbarch)->cause
  44            || regno == mips_regnum (current_gdbarch)->pc
  45            || regno == mips_regnum (current_gdbarch)->fp_control_status
  46            || regno == mips_regnum (current_gdbarch)->fp_implementation_revision)
  47     return 0;
  48   else
  49     return 1;
  50 }
  51
  52 int
  53 mips_linux_cannot_store_register (int regno)
  54 {
  55   if (regno > MIPS_ZERO_REGNUM && regno < MIPS_ZERO_REGNUM + 32)
  56     return 0;
  57   else if (regno >= FP0_REGNUM && regno <= FP0_REGNUM + 32)
  58     return 0;
  59   else if (regno == mips_regnum (current_gdbarch)->lo
  60            || regno == mips_regnum (current_gdbarch)->hi
  61            || regno == mips_regnum (current_gdbarch)->pc
  62            || regno == mips_regnum (current_gdbarch)->fp_control_status)
  63     return 0;
  64   else
  65     return 1;
  66 }
  67
  68 void _initialize_mips_linux_nat (void);
  69
  70 void
  71 _initialize_mips_linux_nat (void)
  72 {
  73   add_target (linux_target ());
  74 }