| 1 | /* Native-dependent code for PowerPC's running NetBSD, for GDB. |
| 2 | Copyright 2002 Free Software Foundation, Inc. |
| 3 | Contributed by Wasabi Systems, 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 <sys/types.h> |
| 23 | #include <sys/ptrace.h> |
| 24 | #include <machine/reg.h> |
| 25 | |
| 26 | #include "defs.h" |
| 27 | #include "inferior.h" |
| 28 | |
| 29 | #include "ppc-tdep.h" |
| 30 | #include "ppcnbsd-tdep.h" |
| 31 | |
| 32 | /* Returns true if PT_GETREGS fetches this register. */ |
| 33 | static int |
| 34 | getregs_supplies (int regno) |
| 35 | { |
| 36 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
| 37 | |
| 38 | return ((regno >= 0 && regno <= 31) |
| 39 | || regno == tdep->ppc_lr_regnum |
| 40 | || regno == tdep->ppc_cr_regnum |
| 41 | || regno == tdep->ppc_xer_regnum |
| 42 | || regno == tdep->ppc_ctr_regnum |
| 43 | || regno == PC_REGNUM); |
| 44 | } |
| 45 | |
| 46 | /* Like above, but for PT_GETFPREGS. */ |
| 47 | static int |
| 48 | getfpregs_supplies (int regno) |
| 49 | { |
| 50 | struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch); |
| 51 | |
| 52 | return ((regno >= FP0_REGNUM && regno <= FP0_REGNUM + 31) |
| 53 | || regno == tdep->ppc_fpscr_regnum); |
| 54 | } |
| 55 | |
| 56 | void |
| 57 | fetch_inferior_registers (int regno) |
| 58 | { |
| 59 | if (regno == -1 || getregs_supplies (regno)) |
| 60 | { |
| 61 | struct reg regs; |
| 62 | |
| 63 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 64 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 65 | perror_with_name ("Couldn't get registers"); |
| 66 | |
| 67 | ppcnbsd_supply_reg ((char *) ®s, regno); |
| 68 | if (regno != -1) |
| 69 | return; |
| 70 | } |
| 71 | |
| 72 | if (regno == -1 || getfpregs_supplies (regno)) |
| 73 | { |
| 74 | struct fpreg fpregs; |
| 75 | |
| 76 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 77 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 78 | perror_with_name ("Couldn't get FP registers"); |
| 79 | |
| 80 | ppcnbsd_supply_fpreg ((char *) &fpregs, regno); |
| 81 | if (regno != -1) |
| 82 | return; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | void |
| 87 | store_inferior_registers (int regno) |
| 88 | { |
| 89 | if (regno == -1 || getregs_supplies (regno)) |
| 90 | { |
| 91 | struct reg regs; |
| 92 | |
| 93 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 94 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 95 | perror_with_name ("Couldn't get registers"); |
| 96 | |
| 97 | ppcnbsd_fill_reg ((char *) ®s, regno); |
| 98 | |
| 99 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 100 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 101 | perror_with_name ("Couldn't write registers"); |
| 102 | |
| 103 | if (regno != -1) |
| 104 | return; |
| 105 | } |
| 106 | |
| 107 | if (regno == -1 || getfpregs_supplies (regno)) |
| 108 | { |
| 109 | struct fpreg fpregs; |
| 110 | |
| 111 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 112 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 113 | perror_with_name ("Couldn't get FP registers"); |
| 114 | |
| 115 | ppcnbsd_fill_fpreg ((char *) &fpregs, regno); |
| 116 | |
| 117 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 118 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 119 | perror_with_name ("Couldn't set FP registers"); |
| 120 | } |
| 121 | } |