| 1 | /* Native-dependent code for Alpha BSD's. |
| 2 | |
| 3 | Copyright 2000, 2001, 2002, 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 "inferior.h" |
| 24 | #include "regcache.h" |
| 25 | |
| 26 | #include "alpha-tdep.h" |
| 27 | #include "alphabsd-tdep.h" |
| 28 | #include "inf-ptrace.h" |
| 29 | |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/ptrace.h> |
| 32 | #include <machine/reg.h> |
| 33 | |
| 34 | #ifdef HAVE_SYS_PROCFS_H |
| 35 | #include <sys/procfs.h> |
| 36 | #endif |
| 37 | |
| 38 | #ifndef HAVE_GREGSET_T |
| 39 | typedef struct reg gregset_t; |
| 40 | #endif |
| 41 | |
| 42 | #ifndef HAVE_FPREGSET_T |
| 43 | typedef struct fpreg fpregset_t; |
| 44 | #endif |
| 45 | |
| 46 | #include "gregset.h" |
| 47 | |
| 48 | /* Provide *regset() wrappers around the generic Alpha BSD register |
| 49 | supply/fill routines. */ |
| 50 | |
| 51 | void |
| 52 | supply_gregset (gregset_t *gregsetp) |
| 53 | { |
| 54 | alphabsd_supply_reg ((char *) gregsetp, -1); |
| 55 | } |
| 56 | |
| 57 | void |
| 58 | fill_gregset (gregset_t *gregsetp, int regno) |
| 59 | { |
| 60 | alphabsd_fill_reg ((char *) gregsetp, regno); |
| 61 | } |
| 62 | |
| 63 | void |
| 64 | supply_fpregset (fpregset_t *fpregsetp) |
| 65 | { |
| 66 | alphabsd_supply_fpreg ((char *) fpregsetp, -1); |
| 67 | } |
| 68 | |
| 69 | void |
| 70 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
| 71 | { |
| 72 | alphabsd_fill_fpreg ((char *) fpregsetp, regno); |
| 73 | } |
| 74 | \f |
| 75 | /* Determine if PT_GETREGS fetches this register. */ |
| 76 | |
| 77 | static int |
| 78 | getregs_supplies (int regno) |
| 79 | { |
| 80 | return ((regno >= ALPHA_V0_REGNUM && regno <= ALPHA_ZERO_REGNUM) |
| 81 | || regno >= ALPHA_PC_REGNUM); |
| 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 | static void |
| 88 | alphabsd_fetch_inferior_registers (int regno) |
| 89 | { |
| 90 | if (regno == -1 || getregs_supplies (regno)) |
| 91 | { |
| 92 | struct reg gregs; |
| 93 | |
| 94 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 95 | (PTRACE_TYPE_ARG3) &gregs, 0) == -1) |
| 96 | perror_with_name (_("Couldn't get registers")); |
| 97 | |
| 98 | alphabsd_supply_reg ((char *) &gregs, regno); |
| 99 | if (regno != -1) |
| 100 | return; |
| 101 | } |
| 102 | |
| 103 | if (regno == -1 || regno >= FP0_REGNUM) |
| 104 | { |
| 105 | struct fpreg fpregs; |
| 106 | |
| 107 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 108 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 109 | perror_with_name (_("Couldn't get floating point status")); |
| 110 | |
| 111 | alphabsd_supply_fpreg ((char *) &fpregs, regno); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /* Store register REGNO back into the inferior. If REGNO is -1, do |
| 116 | this for all registers (including the floating point registers). */ |
| 117 | |
| 118 | static void |
| 119 | alphabsd_store_inferior_registers (int regno) |
| 120 | { |
| 121 | if (regno == -1 || getregs_supplies (regno)) |
| 122 | { |
| 123 | struct reg gregs; |
| 124 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 125 | (PTRACE_TYPE_ARG3) &gregs, 0) == -1) |
| 126 | perror_with_name (_("Couldn't get registers")); |
| 127 | |
| 128 | alphabsd_fill_reg ((char *) &gregs, regno); |
| 129 | |
| 130 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 131 | (PTRACE_TYPE_ARG3) &gregs, 0) == -1) |
| 132 | perror_with_name (_("Couldn't write registers")); |
| 133 | |
| 134 | if (regno != -1) |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | if (regno == -1 || regno >= FP0_REGNUM) |
| 139 | { |
| 140 | struct fpreg fpregs; |
| 141 | |
| 142 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 143 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 144 | perror_with_name (_("Couldn't get floating point status")); |
| 145 | |
| 146 | alphabsd_fill_fpreg ((char *) &fpregs, regno); |
| 147 | |
| 148 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 149 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 150 | perror_with_name (_("Couldn't write floating point status")); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 155 | void _initialize_alphabsd_nat (void); |
| 156 | |
| 157 | void |
| 158 | _initialize_alphabsd_nat (void) |
| 159 | { |
| 160 | struct target_ops *t; |
| 161 | |
| 162 | t = inf_ptrace_target (); |
| 163 | t->to_fetch_registers = alphabsd_fetch_inferior_registers; |
| 164 | t->to_store_registers = alphabsd_store_inferior_registers; |
| 165 | add_target (t); |
| 166 | } |