| 1 | /* Native-dependent code for FreeBSD/aarch64. |
| 2 | |
| 3 | Copyright (C) 2017-2018 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 "target.h" |
| 22 | |
| 23 | #include <sys/types.h> |
| 24 | #include <sys/ptrace.h> |
| 25 | #include <machine/reg.h> |
| 26 | |
| 27 | #include "fbsd-nat.h" |
| 28 | #include "aarch64-tdep.h" |
| 29 | #include "aarch64-fbsd-tdep.h" |
| 30 | #include "inf-ptrace.h" |
| 31 | |
| 32 | /* Determine if PT_GETREGS fetches REGNUM. */ |
| 33 | |
| 34 | static bool |
| 35 | getregs_supplies (struct gdbarch *gdbarch, int regnum) |
| 36 | { |
| 37 | return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM); |
| 38 | } |
| 39 | |
| 40 | /* Determine if PT_GETFPREGS fetches REGNUM. */ |
| 41 | |
| 42 | static bool |
| 43 | getfpregs_supplies (struct gdbarch *gdbarch, int regnum) |
| 44 | { |
| 45 | return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM); |
| 46 | } |
| 47 | |
| 48 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 49 | for all registers. */ |
| 50 | |
| 51 | static void |
| 52 | aarch64_fbsd_fetch_inferior_registers (struct target_ops *ops, |
| 53 | struct regcache *regcache, int regnum) |
| 54 | { |
| 55 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| 56 | |
| 57 | struct gdbarch *gdbarch = regcache->arch (); |
| 58 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| 59 | { |
| 60 | struct reg regs; |
| 61 | |
| 62 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 63 | perror_with_name (_("Couldn't get registers")); |
| 64 | |
| 65 | regcache->supply_regset (&aarch64_fbsd_gregset, regnum, ®s, |
| 66 | sizeof (regs)); |
| 67 | } |
| 68 | |
| 69 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
| 70 | { |
| 71 | struct fpreg fpregs; |
| 72 | |
| 73 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 74 | perror_with_name (_("Couldn't get floating point status")); |
| 75 | |
| 76 | regcache->supply_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, |
| 77 | sizeof (fpregs)); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 82 | this for all registers. */ |
| 83 | |
| 84 | static void |
| 85 | aarch64_fbsd_store_inferior_registers (struct target_ops *ops, |
| 86 | struct regcache *regcache, int regnum) |
| 87 | { |
| 88 | pid_t pid = get_ptrace_pid (regcache_get_ptid (regcache)); |
| 89 | |
| 90 | struct gdbarch *gdbarch = regcache->arch (); |
| 91 | if (regnum == -1 || getregs_supplies (gdbarch, regnum)) |
| 92 | { |
| 93 | struct reg regs; |
| 94 | |
| 95 | if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 96 | perror_with_name (_("Couldn't get registers")); |
| 97 | |
| 98 | regcache->collect_regset (&aarch64_fbsd_gregset, regnum, ®s, |
| 99 | sizeof (regs)); |
| 100 | |
| 101 | if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 102 | perror_with_name (_("Couldn't write registers")); |
| 103 | } |
| 104 | |
| 105 | if (regnum == -1 || getfpregs_supplies (gdbarch, regnum)) |
| 106 | { |
| 107 | struct fpreg fpregs; |
| 108 | |
| 109 | if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 110 | perror_with_name (_("Couldn't get floating point status")); |
| 111 | |
| 112 | regcache->collect_regset (&aarch64_fbsd_fpregset, regnum, &fpregs, |
| 113 | sizeof (fpregs)); |
| 114 | |
| 115 | if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 116 | perror_with_name (_("Couldn't write floating point status")); |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | void |
| 121 | _initialize_aarch64_fbsd_nat (void) |
| 122 | { |
| 123 | struct target_ops *t; |
| 124 | |
| 125 | t = inf_ptrace_target (); |
| 126 | t->to_fetch_registers = aarch64_fbsd_fetch_inferior_registers; |
| 127 | t->to_store_registers = aarch64_fbsd_store_inferior_registers; |
| 128 | fbsd_nat_add_target (t); |
| 129 | } |