| 1 | /* Native-dependent code for FreeBSD/mips. |
| 2 | |
| 3 | Copyright (C) 2017 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 "fbsd-nat.h" |
| 30 | #include "mips-tdep.h" |
| 31 | #include "mips-fbsd-tdep.h" |
| 32 | #include "inf-ptrace.h" |
| 33 | |
| 34 | /* Determine if PT_GETREGS fetches this register. */ |
| 35 | |
| 36 | static bool |
| 37 | getregs_supplies (struct gdbarch *gdbarch, int regnum) |
| 38 | { |
| 39 | return (regnum >= MIPS_ZERO_REGNUM |
| 40 | && regnum <= gdbarch_pc_regnum (gdbarch)); |
| 41 | } |
| 42 | |
| 43 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 44 | for all registers. */ |
| 45 | |
| 46 | static void |
| 47 | mips_fbsd_fetch_inferior_registers (struct target_ops *ops, |
| 48 | struct regcache *regcache, int regnum) |
| 49 | { |
| 50 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| 51 | |
| 52 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 53 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| 54 | { |
| 55 | struct reg regs; |
| 56 | |
| 57 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 58 | perror_with_name (_("Couldn't get registers")); |
| 59 | |
| 60 | mips_fbsd_supply_gregs (regcache, regnum, ®s, sizeof (register_t)); |
| 61 | if (regnum != -1) |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | if (regnum == -1 |
| 66 | || regnum >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) |
| 67 | { |
| 68 | struct fpreg fpregs; |
| 69 | |
| 70 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 71 | perror_with_name (_("Couldn't get floating point status")); |
| 72 | |
| 73 | mips_fbsd_supply_fpregs (regcache, regnum, &fpregs, |
| 74 | sizeof (f_register_t)); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 79 | this for all registers. */ |
| 80 | |
| 81 | static void |
| 82 | mips_fbsd_store_inferior_registers (struct target_ops *ops, |
| 83 | struct regcache *regcache, int regnum) |
| 84 | { |
| 85 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| 86 | |
| 87 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 88 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| 89 | { |
| 90 | struct reg regs; |
| 91 | |
| 92 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 93 | perror_with_name (_("Couldn't get registers")); |
| 94 | |
| 95 | mips_fbsd_collect_gregs (regcache, regnum, (char *) ®s, |
| 96 | sizeof (register_t)); |
| 97 | |
| 98 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 99 | perror_with_name (_("Couldn't write registers")); |
| 100 | |
| 101 | if (regnum != -1) |
| 102 | return; |
| 103 | } |
| 104 | |
| 105 | if (regnum == -1 |
| 106 | || regnum >= gdbarch_fp0_regnum (get_regcache_arch (regcache))) |
| 107 | { |
| 108 | struct fpreg fpregs; |
| 109 | |
| 110 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 111 | perror_with_name (_("Couldn't get floating point status")); |
| 112 | |
| 113 | mips_fbsd_collect_fpregs (regcache, regnum, (char *) &fpregs, |
| 114 | sizeof (f_register_t)); |
| 115 | |
| 116 | if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 117 | perror_with_name (_("Couldn't write floating point status")); |
| 118 | } |
| 119 | } |
| 120 | \f |
| 121 | |
| 122 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 123 | void _initialize_mips_fbsd_nat (void); |
| 124 | |
| 125 | void |
| 126 | _initialize_mips_fbsd_nat (void) |
| 127 | { |
| 128 | struct target_ops *t; |
| 129 | |
| 130 | t = inf_ptrace_target (); |
| 131 | t->to_fetch_registers = mips_fbsd_fetch_inferior_registers; |
| 132 | t->to_store_registers = mips_fbsd_store_inferior_registers; |
| 133 | fbsd_nat_add_target (t); |
| 134 | } |