| 1 | /* Native-dependent code for AMD64 BSD's. |
| 2 | |
| 3 | Copyright (C) 2003-2015 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 | /* We include <signal.h> to make sure `struct fxsave64' is defined on |
| 26 | NetBSD, since NetBSD's <machine/reg.h> needs it. */ |
| 27 | #include <signal.h> |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/ptrace.h> |
| 30 | #include <machine/reg.h> |
| 31 | |
| 32 | #include "amd64-tdep.h" |
| 33 | #include "amd64-nat.h" |
| 34 | #include "amd64bsd-nat.h" |
| 35 | #include "inf-ptrace.h" |
| 36 | \f |
| 37 | |
| 38 | #ifdef PT_GETXSTATE_INFO |
| 39 | size_t amd64bsd_xsave_len; |
| 40 | #endif |
| 41 | |
| 42 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
| 43 | for all registers (including the floating-point registers). */ |
| 44 | |
| 45 | static void |
| 46 | amd64bsd_fetch_inferior_registers (struct target_ops *ops, |
| 47 | struct regcache *regcache, int regnum) |
| 48 | { |
| 49 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 50 | |
| 51 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 52 | { |
| 53 | struct reg regs; |
| 54 | |
| 55 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
| 56 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 57 | perror_with_name (_("Couldn't get registers")); |
| 58 | |
| 59 | amd64_supply_native_gregset (regcache, ®s, -1); |
| 60 | if (regnum != -1) |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 65 | { |
| 66 | struct fpreg fpregs; |
| 67 | #ifdef PT_GETXSTATE_INFO |
| 68 | char *xstateregs; |
| 69 | |
| 70 | if (amd64bsd_xsave_len != 0) |
| 71 | { |
| 72 | xstateregs = alloca (amd64bsd_xsave_len); |
| 73 | if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid), |
| 74 | (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) |
| 75 | perror_with_name (_("Couldn't get extended state status")); |
| 76 | |
| 77 | amd64_supply_xsave (regcache, -1, xstateregs); |
| 78 | return; |
| 79 | } |
| 80 | #endif |
| 81 | |
| 82 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
| 83 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 84 | perror_with_name (_("Couldn't get floating point status")); |
| 85 | |
| 86 | amd64_supply_fxsave (regcache, -1, &fpregs); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
| 91 | this for all registers (including the floating-point registers). */ |
| 92 | |
| 93 | static void |
| 94 | amd64bsd_store_inferior_registers (struct target_ops *ops, |
| 95 | struct regcache *regcache, int regnum) |
| 96 | { |
| 97 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 98 | |
| 99 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 100 | { |
| 101 | struct reg regs; |
| 102 | |
| 103 | if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid), |
| 104 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 105 | perror_with_name (_("Couldn't get registers")); |
| 106 | |
| 107 | amd64_collect_native_gregset (regcache, ®s, regnum); |
| 108 | |
| 109 | if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid), |
| 110 | (PTRACE_TYPE_ARG3) ®s, 0) == -1) |
| 111 | perror_with_name (_("Couldn't write registers")); |
| 112 | |
| 113 | if (regnum != -1) |
| 114 | return; |
| 115 | } |
| 116 | |
| 117 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 118 | { |
| 119 | struct fpreg fpregs; |
| 120 | #ifdef PT_GETXSTATE_INFO |
| 121 | char *xstateregs; |
| 122 | |
| 123 | if (amd64bsd_xsave_len != 0) |
| 124 | { |
| 125 | xstateregs = alloca (amd64bsd_xsave_len); |
| 126 | if (ptrace (PT_GETXSTATE, ptid_get_pid (inferior_ptid), |
| 127 | (PTRACE_TYPE_ARG3) xstateregs, 0) == -1) |
| 128 | perror_with_name (_("Couldn't get extended state status")); |
| 129 | |
| 130 | amd64_collect_xsave (regcache, regnum, xstateregs, 0); |
| 131 | |
| 132 | if (ptrace (PT_SETXSTATE, ptid_get_pid (inferior_ptid), |
| 133 | (PTRACE_TYPE_ARG3) xstateregs, amd64bsd_xsave_len) == -1) |
| 134 | perror_with_name (_("Couldn't write extended state status")); |
| 135 | return; |
| 136 | } |
| 137 | #endif |
| 138 | |
| 139 | if (ptrace (PT_GETFPREGS, ptid_get_pid (inferior_ptid), |
| 140 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 141 | perror_with_name (_("Couldn't get floating point status")); |
| 142 | |
| 143 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
| 144 | |
| 145 | if (ptrace (PT_SETFPREGS, ptid_get_pid (inferior_ptid), |
| 146 | (PTRACE_TYPE_ARG3) &fpregs, 0) == -1) |
| 147 | perror_with_name (_("Couldn't write floating point status")); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | /* Create a prototype *BSD/amd64 target. The client can override it |
| 152 | with local methods. */ |
| 153 | |
| 154 | struct target_ops * |
| 155 | amd64bsd_target (void) |
| 156 | { |
| 157 | struct target_ops *t; |
| 158 | |
| 159 | t = inf_ptrace_target (); |
| 160 | t->to_fetch_registers = amd64bsd_fetch_inferior_registers; |
| 161 | t->to_store_registers = amd64bsd_store_inferior_registers; |
| 162 | return t; |
| 163 | } |
| 164 | \f |
| 165 | |
| 166 | /* Support for debug registers. */ |
| 167 | |
| 168 | #ifdef HAVE_PT_GETDBREGS |
| 169 | |
| 170 | static unsigned long |
| 171 | amd64bsd_dr_get (ptid_t ptid, int regnum) |
| 172 | { |
| 173 | struct dbreg dbregs; |
| 174 | |
| 175 | if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid), |
| 176 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
| 177 | perror_with_name (_("Couldn't read debug registers")); |
| 178 | |
| 179 | return DBREG_DRX ((&dbregs), regnum); |
| 180 | } |
| 181 | |
| 182 | static void |
| 183 | amd64bsd_dr_set (int regnum, unsigned long value) |
| 184 | { |
| 185 | struct dbreg dbregs; |
| 186 | |
| 187 | if (ptrace (PT_GETDBREGS, ptid_get_pid (inferior_ptid), |
| 188 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
| 189 | perror_with_name (_("Couldn't get debug registers")); |
| 190 | |
| 191 | /* For some mysterious reason, some of the reserved bits in the |
| 192 | debug control register get set. Mask these off, otherwise the |
| 193 | ptrace call below will fail. */ |
| 194 | DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00); |
| 195 | |
| 196 | DBREG_DRX ((&dbregs), regnum) = value; |
| 197 | |
| 198 | if (ptrace (PT_SETDBREGS, ptid_get_pid (inferior_ptid), |
| 199 | (PTRACE_TYPE_ARG3) &dbregs, 0) == -1) |
| 200 | perror_with_name (_("Couldn't write debug registers")); |
| 201 | } |
| 202 | |
| 203 | void |
| 204 | amd64bsd_dr_set_control (unsigned long control) |
| 205 | { |
| 206 | amd64bsd_dr_set (7, control); |
| 207 | } |
| 208 | |
| 209 | void |
| 210 | amd64bsd_dr_set_addr (int regnum, CORE_ADDR addr) |
| 211 | { |
| 212 | gdb_assert (regnum >= 0 && regnum <= 4); |
| 213 | |
| 214 | amd64bsd_dr_set (regnum, addr); |
| 215 | } |
| 216 | |
| 217 | CORE_ADDR |
| 218 | amd64bsd_dr_get_addr (int regnum) |
| 219 | { |
| 220 | return amd64bsd_dr_get (inferior_ptid, regnum); |
| 221 | } |
| 222 | |
| 223 | unsigned long |
| 224 | amd64bsd_dr_get_status (void) |
| 225 | { |
| 226 | return amd64bsd_dr_get (inferior_ptid, 6); |
| 227 | } |
| 228 | |
| 229 | unsigned long |
| 230 | amd64bsd_dr_get_control (void) |
| 231 | { |
| 232 | return amd64bsd_dr_get (inferior_ptid, 7); |
| 233 | } |
| 234 | |
| 235 | #endif /* PT_GETDBREGS */ |