| 1 | /* Native-dependent code for MIPS systems running NetBSD. |
| 2 | |
| 3 | Copyright (C) 2000-2016 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "inferior.h" |
| 22 | #include "regcache.h" |
| 23 | #include "target.h" |
| 24 | |
| 25 | #include <sys/types.h> |
| 26 | #include <sys/ptrace.h> |
| 27 | #include <machine/reg.h> |
| 28 | |
| 29 | #include "mips-tdep.h" |
| 30 | #include "mipsnbsd-tdep.h" |
| 31 | #include "inf-ptrace.h" |
| 32 | |
| 33 | /* Determine if PT_GETREGS fetches this register. */ |
| 34 | static int |
| 35 | getregs_supplies (struct gdbarch *gdbarch, int regno) |
| 36 | { |
| 37 | return ((regno) >= MIPS_ZERO_REGNUM |
| 38 | && (regno) <= gdbarch_pc_regnum (gdbarch)); |
| 39 | } |
| 40 | |
| 41 | static void |
| 42 | mipsnbsd_fetch_inferior_registers (struct target_ops *ops, |
| 43 | struct regcache *regcache, int regno) |
| 44 | { |
| 45 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 46 | if (regno == -1 || getregs_supplies (gdbarch, regno)) |
| 47 | { |
| 48 | struct reg regs; |
| 49 | |
| 50 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
| 51 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 52 | perror_with_name (_("Couldn't get registers")); |
| 53 | |
| 54 | mipsnbsd_supply_reg (regcache, (char *) ®s, regno); |
| 55 | if (regno != -1) |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | if (regno == -1 |
| 60 | || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) |
| 61 | { |
| 62 | struct fpreg fpregs; |
| 63 | |
| 64 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
| 65 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 66 | perror_with_name (_("Couldn't get floating point status")); |
| 67 | |
| 68 | mipsnbsd_supply_fpreg (regcache, (char *) &fpregs, regno); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | static void |
| 73 | mipsnbsd_store_inferior_registers (struct target_ops *ops, |
| 74 | struct regcache *regcache, int regno) |
| 75 | { |
| 76 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 77 | if (regno == -1 || getregs_supplies (gdbarch, regno)) |
| 78 | { |
| 79 | struct reg regs; |
| 80 | |
| 81 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
| 82 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 83 | perror_with_name (_("Couldn't get registers")); |
| 84 | |
| 85 | mipsnbsd_fill_reg (regcache, (char *) ®s, regno); |
| 86 | |
| 87 | if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid), |
| 88 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 89 | perror_with_name (_("Couldn't write registers")); |
| 90 | |
| 91 | if (regno != -1) |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | if (regno == -1 |
| 96 | || regno >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) |
| 97 | { |
| 98 | struct fpreg fpregs; |
| 99 | |
| 100 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
| 101 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 102 | perror_with_name (_("Couldn't get floating point status")); |
| 103 | |
| 104 | mipsnbsd_fill_fpreg (regcache, (char *) &fpregs, regno); |
| 105 | |
| 106 | if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid), |
| 107 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 108 | perror_with_name (_("Couldn't write floating point status")); |
| 109 | } |
| 110 | } |
| 111 | \f |
| 112 | |
| 113 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 114 | void _initialize_mipsnbsd_nat (void); |
| 115 | |
| 116 | void |
| 117 | _initialize_mipsnbsd_nat (void) |
| 118 | { |
| 119 | struct target_ops *t; |
| 120 | |
| 121 | t = inf_ptrace_target (); |
| 122 | t->to_fetch_registers = mipsnbsd_fetch_inferior_registers; |
| 123 | t->to_store_registers = mipsnbsd_store_inferior_registers; |
| 124 | add_target (t); |
| 125 | } |