| 1 | /* Native-dependent code for GNU/Linux on MIPS processors. |
| 2 | |
| 3 | Copyright 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., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, 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 | } |