| 1 | /* Native-dependent code for Alpha BSD's. |
| 2 | Copyright 2000, 2001, 2002 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "inferior.h" |
| 23 | #include "regcache.h" |
| 24 | |
| 25 | #include "alpha-tdep.h" |
| 26 | #include "alphabsd-tdep.h" |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/ptrace.h> |
| 30 | #include <machine/reg.h> |
| 31 | |
| 32 | #ifdef HAVE_SYS_PROCFS_H |
| 33 | #include <sys/procfs.h> |
| 34 | #endif |
| 35 | |
| 36 | #ifndef HAVE_GREGSET_T |
| 37 | typedef struct reg gregset_t; |
| 38 | #endif |
| 39 | |
| 40 | #ifndef HAVE_FPREGSET_T |
| 41 | typedef struct fpreg fpregset_t; |
| 42 | #endif |
| 43 | |
| 44 | #include "gregset.h" |
| 45 | |
| 46 | /* Provide *regset() wrappers around the generic Alpha BSD register |
| 47 | supply/fill routines. */ |
| 48 | |
| 49 | void |
| 50 | supply_gregset (gregset_t *gregsetp) |
| 51 | { |
| 52 | alphabsd_supply_reg ((char *) gregsetp, -1); |
| 53 | } |
| 54 | |
| 55 | void |
| 56 | fill_gregset (gregset_t *gregsetp, int regno) |
| 57 | { |
| 58 | alphabsd_fill_reg ((char *) gregsetp, regno); |
| 59 | } |
| 60 | |
| 61 | void |
| 62 | supply_fpregset (fpregset_t *fpregsetp) |
| 63 | { |
| 64 | alphabsd_supply_fpreg ((char *) fpregsetp, -1); |
| 65 | } |
| 66 | |
| 67 | void |
| 68 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
| 69 | { |
| 70 | alphabsd_fill_fpreg ((char *) fpregsetp, regno); |
| 71 | } |
| 72 | \f |
| 73 | /* Determine if PT_GETREGS fetches this register. */ |
| 74 | |
| 75 | static int |
| 76 | getregs_supplies (int regno) |
| 77 | { |
| 78 | |
| 79 | return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM) |
| 80 | || regno >= PC_REGNUM); |
| 81 | } |
| 82 | |
| 83 | |
| 84 | /* Fetch register REGNO from the inferior. If REGNO is -1, do this |
| 85 | for all registers (including the floating point registers). */ |
| 86 | |
| 87 | void |
| 88 | fetch_inferior_registers (int regno) |
| 89 | { |
| 90 | |
| 91 | if (regno == -1 || getregs_supplies (regno)) |
| 92 | { |
| 93 | struct reg gregs; |
| 94 | |
| 95 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 96 | (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 97 | perror_with_name ("Couldn't get registers"); |
| 98 | |
| 99 | alphabsd_supply_reg ((char *) &gregs, regno); |
| 100 | if (regno != -1) |
| 101 | return; |
| 102 | } |
| 103 | |
| 104 | if (regno == -1 || regno >= FP0_REGNUM) |
| 105 | { |
| 106 | struct fpreg fpregs; |
| 107 | |
| 108 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 109 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 110 | perror_with_name ("Couldn't get floating point status"); |
| 111 | |
| 112 | alphabsd_supply_fpreg ((char *) &fpregs, regno); |
| 113 | } |
| 114 | |
| 115 | /* Reset virtual frame pointer. */ |
| 116 | supply_register (FP_REGNUM, NULL); |
| 117 | } |
| 118 | |
| 119 | /* Store register REGNO back into the inferior. If REGNO is -1, do |
| 120 | this for all registers (including the floating point registers). */ |
| 121 | |
| 122 | void |
| 123 | store_inferior_registers (int regno) |
| 124 | { |
| 125 | |
| 126 | if (regno == -1 || getregs_supplies (regno)) |
| 127 | { |
| 128 | struct reg gregs; |
| 129 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 130 | (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 131 | perror_with_name ("Couldn't get registers"); |
| 132 | |
| 133 | alphabsd_fill_reg ((char *) &gregs, regno); |
| 134 | |
| 135 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 136 | (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 137 | perror_with_name ("Couldn't write registers"); |
| 138 | |
| 139 | if (regno != -1) |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | if (regno == -1 || regno >= FP0_REGNUM) |
| 144 | { |
| 145 | struct fpreg fpregs; |
| 146 | |
| 147 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 148 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 149 | perror_with_name ("Couldn't get floating point status"); |
| 150 | |
| 151 | alphabsd_fill_fpreg ((char *) &fpregs, regno); |
| 152 | |
| 153 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 154 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 155 | perror_with_name ("Couldn't write floating point status"); |
| 156 | } |
| 157 | } |