| 1 | /* Native-dependent code for SPARC systems running NetBSD. |
| 2 | Copyright 2002, 2003 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 "defs.h" |
| 23 | #include "inferior.h" |
| 24 | #include "regcache.h" |
| 25 | |
| 26 | #include "sparc-tdep.h" |
| 27 | #include "sparcnbsd-tdep.h" |
| 28 | |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/ptrace.h> |
| 31 | #include <machine/reg.h> |
| 32 | |
| 33 | /* NOTE: We don't bother with any of the deferred_store nonsense; it |
| 34 | makes things a lot more complicated than they need to be. */ |
| 35 | |
| 36 | /* Determine if PT_GETREGS fetches this register. */ |
| 37 | static int |
| 38 | getregs_supplies (int regno) |
| 39 | { |
| 40 | return (regno == PS_REGNUM |
| 41 | || regno == PC_REGNUM |
| 42 | || regno == DEPRECATED_NPC_REGNUM |
| 43 | || regno == Y_REGNUM |
| 44 | || (regno >= G0_REGNUM && regno <= G7_REGNUM) |
| 45 | || (regno >= O0_REGNUM && regno <= O7_REGNUM) |
| 46 | /* stack regs (handled by sparcnbsd_supply_reg) */ |
| 47 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)); |
| 48 | } |
| 49 | |
| 50 | /* Determine if PT_GETFPREGS fetches this register. */ |
| 51 | static int |
| 52 | getfpregs_supplies (int regno) |
| 53 | { |
| 54 | return ((regno >= FP0_REGNUM && regno <= (FP0_REGNUM + 31)) |
| 55 | || regno == FPS_REGNUM); |
| 56 | } |
| 57 | |
| 58 | void |
| 59 | fetch_inferior_registers (int regno) |
| 60 | { |
| 61 | /* We don't use deferred stores. */ |
| 62 | if (deferred_stores) |
| 63 | internal_error (__FILE__, __LINE__, |
| 64 | "fetch_inferior_registers: deferred stores pending"); |
| 65 | |
| 66 | if (regno == -1 || getregs_supplies (regno)) |
| 67 | { |
| 68 | struct reg regs; |
| 69 | |
| 70 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 71 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 72 | perror_with_name ("Couldn't get registers"); |
| 73 | |
| 74 | sparcnbsd_supply_reg32 ((char *) ®s, regno); |
| 75 | if (regno != -1) |
| 76 | return; |
| 77 | } |
| 78 | |
| 79 | if (regno == -1 || getfpregs_supplies (regno)) |
| 80 | { |
| 81 | struct fpreg fpregs; |
| 82 | |
| 83 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 84 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 85 | perror_with_name ("Couldn't get floating point registers"); |
| 86 | |
| 87 | sparcnbsd_supply_fpreg32 ((char *) &fpregs, regno); |
| 88 | if (regno != -1) |
| 89 | return; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | store_inferior_registers (int regno) |
| 95 | { |
| 96 | /* We don't use deferred stores. */ |
| 97 | if (deferred_stores) |
| 98 | internal_error (__FILE__, __LINE__, |
| 99 | "store_inferior_registers: deferred stores pending"); |
| 100 | |
| 101 | if (regno == -1 || getregs_supplies (regno)) |
| 102 | { |
| 103 | struct reg regs; |
| 104 | |
| 105 | if (ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 106 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 107 | perror_with_name ("Couldn't get registers"); |
| 108 | |
| 109 | sparcnbsd_fill_reg32 ((char *) ®s, regno); |
| 110 | |
| 111 | if (ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 112 | (PTRACE_ARG3_TYPE) ®s, 0) == -1) |
| 113 | perror_with_name ("Couldn't write registers"); |
| 114 | |
| 115 | /* Deal with the stack regs. */ |
| 116 | if (regno == -1 || regno == SP_REGNUM |
| 117 | || (regno >= L0_REGNUM && regno <= I7_REGNUM)) |
| 118 | { |
| 119 | CORE_ADDR sp = read_register (SP_REGNUM); |
| 120 | int i; |
| 121 | char buf[4]; |
| 122 | |
| 123 | for (i = L0_REGNUM; i <= I7_REGNUM; i++) |
| 124 | { |
| 125 | if (regno == -1 || regno == SP_REGNUM || regno == i) |
| 126 | { |
| 127 | regcache_collect (i, buf); |
| 128 | target_write_memory (sp + ((i - L0_REGNUM) * 4), |
| 129 | buf, sizeof (buf)); |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | if (regno != -1) |
| 135 | return; |
| 136 | } |
| 137 | |
| 138 | if (regno == -1 || getfpregs_supplies (regno)) |
| 139 | { |
| 140 | struct fpreg fpregs; |
| 141 | |
| 142 | if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 143 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 144 | perror_with_name ("Couldn't get floating point registers"); |
| 145 | |
| 146 | sparcnbsd_fill_fpreg32 ((char *) &fpregs, regno); |
| 147 | |
| 148 | if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 149 | (PTRACE_ARG3_TYPE) &fpregs, 0) == -1) |
| 150 | perror_with_name ("Couldn't write floating point registers"); |
| 151 | |
| 152 | if (regno != -1) |
| 153 | return; |
| 154 | } |
| 155 | } |