| 1 | /* Native-dependent code for Alpha BSD's. |
| 2 | Copyright (C) 2000 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 | |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/ptrace.h> |
| 26 | #include <machine/reg.h> |
| 27 | |
| 28 | #ifdef HAVE_SYS_PROCFS_H |
| 29 | #include <sys/procfs.h> |
| 30 | #endif |
| 31 | |
| 32 | #ifndef HAVE_GREGSET_T |
| 33 | typedef struct reg gregset_t; |
| 34 | #endif |
| 35 | |
| 36 | #ifndef HAVE_FPREGSET_T |
| 37 | typedef struct fpreg fpregset_t; |
| 38 | #endif |
| 39 | |
| 40 | #include "gregset.h" |
| 41 | |
| 42 | /* Number of general-purpose registers. */ |
| 43 | #define NUM_GREGS 32 |
| 44 | |
| 45 | /* Number of floating point registers. */ |
| 46 | #define NUM_FPREGS 31 |
| 47 | \f |
| 48 | |
| 49 | /* Transfering the registers between GDB, inferiors and core files. */ |
| 50 | |
| 51 | /* Fill GDB's register array with the general-purpose register values |
| 52 | in *GREGSETP. */ |
| 53 | |
| 54 | void |
| 55 | supply_gregset (gregset_t *gregsetp) |
| 56 | { |
| 57 | int i; |
| 58 | |
| 59 | for (i = 0; i < NUM_GREGS; i++) |
| 60 | { |
| 61 | if (CANNOT_FETCH_REGISTER (i)) |
| 62 | supply_register (i, NULL); |
| 63 | else |
| 64 | supply_register (i, (char *) &gregsetp->r_regs[i]); |
| 65 | } |
| 66 | |
| 67 | /* The PC travels in the R_ZERO slot. */ |
| 68 | supply_register (PC_REGNUM, (char *) &gregsetp->r_regs[R_ZERO]); |
| 69 | } |
| 70 | |
| 71 | /* Fill register REGNO (if it is a general-purpose register) in |
| 72 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, |
| 73 | do this for all registers. */ |
| 74 | |
| 75 | void |
| 76 | fill_gregset (gregset_t *gregsetp, int regno) |
| 77 | { |
| 78 | int i; |
| 79 | |
| 80 | for (i = 0; i < NUM_GREGS; i++) |
| 81 | if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i)) |
| 82 | memcpy (&gregsetp->r_regs[i], ®isters[REGISTER_BYTE (i)], |
| 83 | REGISTER_RAW_SIZE (i)); |
| 84 | |
| 85 | /* The PC travels in the R_ZERO slot. */ |
| 86 | if (regno == -1 || regno == PC_REGNUM) |
| 87 | memcpy (&gregsetp->r_regs[R_ZERO], ®isters[REGISTER_BYTE (PC_REGNUM)], |
| 88 | REGISTER_RAW_SIZE (PC_REGNUM)); |
| 89 | } |
| 90 | |
| 91 | /* Fill GDB's register array with the floating-point register values |
| 92 | in *FPREGSETP. */ |
| 93 | |
| 94 | void |
| 95 | supply_fpregset (fpregset_t *fpregsetp) |
| 96 | { |
| 97 | int i; |
| 98 | |
| 99 | for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++) |
| 100 | { |
| 101 | if (CANNOT_FETCH_REGISTER (i)) |
| 102 | supply_register (i, NULL); |
| 103 | else |
| 104 | supply_register (i, (char *) &fpregsetp->fpr_regs[i - FP0_REGNUM]); |
| 105 | } |
| 106 | |
| 107 | supply_register (FPCR_REGNUM, (char *) &fpregsetp->fpr_cr); |
| 108 | } |
| 109 | |
| 110 | /* Fill register REGNO (if it is a floating-point register) in |
| 111 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, |
| 112 | do this for all registers. */ |
| 113 | |
| 114 | void |
| 115 | fill_fpregset (fpregset_t *fpregsetp, int regno) |
| 116 | { |
| 117 | int i; |
| 118 | |
| 119 | for (i = FP0_REGNUM; i < FP0_REGNUM + NUM_FPREGS; i++) |
| 120 | if ((regno == -1 || regno == i) && ! CANNOT_STORE_REGISTER (i)) |
| 121 | memcpy (&fpregsetp->fpr_regs[i - FP0_REGNUM], |
| 122 | ®isters[REGISTER_BYTE (i)], REGISTER_RAW_SIZE (i)); |
| 123 | |
| 124 | if (regno == -1 || regno == FPCR_REGNUM) |
| 125 | memcpy (&fpregsetp->fpr_cr, ®isters[REGISTER_BYTE (FPCR_REGNUM)], |
| 126 | REGISTER_RAW_SIZE (FPCR_REGNUM)); |
| 127 | } |
| 128 | |
| 129 | /* Fetch register REGNO from the inferior. If REGNO is -1, do this |
| 130 | for all registers (including the floating point registers). */ |
| 131 | |
| 132 | void |
| 133 | fetch_inferior_registers (int regno) |
| 134 | { |
| 135 | gregset_t gregs; |
| 136 | |
| 137 | if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 138 | perror_with_name ("Couldn't get registers"); |
| 139 | |
| 140 | supply_gregset (&gregs); |
| 141 | |
| 142 | if (regno == -1 || regno >= FP0_REGNUM) |
| 143 | { |
| 144 | fpregset_t fpregs; |
| 145 | |
| 146 | if (ptrace (PT_GETFPREGS, inferior_pid, |
| 147 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 148 | perror_with_name ("Couldn't get floating point status"); |
| 149 | |
| 150 | supply_fpregset (&fpregs); |
| 151 | } |
| 152 | |
| 153 | /* Reset virtual frame pointer. */ |
| 154 | supply_register (FP_REGNUM, NULL); |
| 155 | } |
| 156 | |
| 157 | /* Store register REGNO back into the inferior. If REGNO is -1, do |
| 158 | this for all registers (including the floating point registers). */ |
| 159 | |
| 160 | void |
| 161 | store_inferior_registers (int regno) |
| 162 | { |
| 163 | gregset_t gregs; |
| 164 | |
| 165 | if (ptrace (PT_GETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 166 | perror_with_name ("Couldn't get registers"); |
| 167 | |
| 168 | fill_gregset (&gregs, regno); |
| 169 | |
| 170 | if (ptrace (PT_SETREGS, inferior_pid, (PTRACE_ARG3_TYPE) &gregs, 0) == -1) |
| 171 | perror_with_name ("Couldn't write registers"); |
| 172 | |
| 173 | if (regno == -1 || regno >= FP0_REGNUM) |
| 174 | { |
| 175 | fpregset_t fpregs; |
| 176 | |
| 177 | if (ptrace (PT_GETFPREGS, inferior_pid, |
| 178 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 179 | perror_with_name ("Couldn't get floating point status"); |
| 180 | |
| 181 | fill_fpregset (&fpregs, regno); |
| 182 | |
| 183 | if (ptrace (PT_SETFPREGS, inferior_pid, |
| 184 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 185 | perror_with_name ("Couldn't write floating point status"); |
| 186 | } |
| 187 | } |