| 1 | /* Target-dependent code for OpenBSD. |
| 2 | |
| 3 | Copyright (C) 2005-2019 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 "frame.h" |
| 22 | #include "symtab.h" |
| 23 | #include "objfiles.h" |
| 24 | |
| 25 | #include "obsd-tdep.h" |
| 26 | |
| 27 | CORE_ADDR |
| 28 | obsd_skip_solib_resolver (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 29 | { |
| 30 | struct bound_minimal_symbol msym; |
| 31 | |
| 32 | msym = lookup_minimal_symbol("_dl_bind", NULL, NULL); |
| 33 | if (msym.minsym && BMSYMBOL_VALUE_ADDRESS (msym) == pc) |
| 34 | return frame_unwind_caller_pc (get_current_frame ()); |
| 35 | else |
| 36 | return find_solib_trampoline_target (get_current_frame (), pc); |
| 37 | } |
| 38 | |
| 39 | /* OpenBSD signal numbers. From <sys/signal.h>. */ |
| 40 | |
| 41 | enum |
| 42 | { |
| 43 | OBSD_SIGHUP = 1, |
| 44 | OBSD_SIGINT = 2, |
| 45 | OBSD_SIGQUIT = 3, |
| 46 | OBSD_SIGILL = 4, |
| 47 | OBSD_SIGTRAP = 5, |
| 48 | OBSD_SIGABRT = 6, |
| 49 | OBSD_SIGEMT = 7, |
| 50 | OBSD_SIGFPE = 8, |
| 51 | OBSD_SIGKILL = 9, |
| 52 | OBSD_SIGBUS = 10, |
| 53 | OBSD_SIGSEGV = 11, |
| 54 | OBSD_SIGSYS = 12, |
| 55 | OBSD_SIGPIPE = 13, |
| 56 | OBSD_SIGALRM = 14, |
| 57 | OBSD_SIGTERM = 15, |
| 58 | OBSD_SIGURG = 16, |
| 59 | OBSD_SIGSTOP = 17, |
| 60 | OBSD_SIGTSTP = 18, |
| 61 | OBSD_SIGCONT = 19, |
| 62 | OBSD_SIGCHLD = 20, |
| 63 | OBSD_SIGTTIN = 21, |
| 64 | OBSD_SIGTTOU = 22, |
| 65 | OBSD_SIGIO = 23, |
| 66 | OBSD_SIGXCPU = 24, |
| 67 | OBSD_SIGXFSZ = 25, |
| 68 | OBSD_SIGVTALRM = 26, |
| 69 | OBSD_SIGPROF = 27, |
| 70 | OBSD_SIGWINCH = 28, |
| 71 | OBSD_SIGINFO = 29, |
| 72 | OBSD_SIGUSR1 = 30, |
| 73 | OBSD_SIGUSR2 = 31, |
| 74 | OBSD_SIGTHR = 32, |
| 75 | }; |
| 76 | |
| 77 | /* Implement the "gdb_signal_from_target" gdbarch method. */ |
| 78 | |
| 79 | static enum gdb_signal |
| 80 | obsd_gdb_signal_from_target (struct gdbarch *gdbarch, int signal) |
| 81 | { |
| 82 | switch (signal) |
| 83 | { |
| 84 | case 0: |
| 85 | return GDB_SIGNAL_0; |
| 86 | |
| 87 | case OBSD_SIGHUP: |
| 88 | return GDB_SIGNAL_HUP; |
| 89 | |
| 90 | case OBSD_SIGINT: |
| 91 | return GDB_SIGNAL_INT; |
| 92 | |
| 93 | case OBSD_SIGQUIT: |
| 94 | return GDB_SIGNAL_QUIT; |
| 95 | |
| 96 | case OBSD_SIGILL: |
| 97 | return GDB_SIGNAL_ILL; |
| 98 | |
| 99 | case OBSD_SIGTRAP: |
| 100 | return GDB_SIGNAL_TRAP; |
| 101 | |
| 102 | case OBSD_SIGABRT: |
| 103 | return GDB_SIGNAL_ABRT; |
| 104 | |
| 105 | case OBSD_SIGEMT: |
| 106 | return GDB_SIGNAL_EMT; |
| 107 | |
| 108 | case OBSD_SIGFPE: |
| 109 | return GDB_SIGNAL_FPE; |
| 110 | |
| 111 | case OBSD_SIGKILL: |
| 112 | return GDB_SIGNAL_KILL; |
| 113 | |
| 114 | case OBSD_SIGBUS: |
| 115 | return GDB_SIGNAL_BUS; |
| 116 | |
| 117 | case OBSD_SIGSEGV: |
| 118 | return GDB_SIGNAL_SEGV; |
| 119 | |
| 120 | case OBSD_SIGSYS: |
| 121 | return GDB_SIGNAL_SYS; |
| 122 | |
| 123 | case OBSD_SIGPIPE: |
| 124 | return GDB_SIGNAL_PIPE; |
| 125 | |
| 126 | case OBSD_SIGALRM: |
| 127 | return GDB_SIGNAL_ALRM; |
| 128 | |
| 129 | case OBSD_SIGTERM: |
| 130 | return GDB_SIGNAL_TERM; |
| 131 | |
| 132 | case OBSD_SIGURG: |
| 133 | return GDB_SIGNAL_URG; |
| 134 | |
| 135 | case OBSD_SIGSTOP: |
| 136 | return GDB_SIGNAL_STOP; |
| 137 | |
| 138 | case OBSD_SIGTSTP: |
| 139 | return GDB_SIGNAL_TSTP; |
| 140 | |
| 141 | case OBSD_SIGCONT: |
| 142 | return GDB_SIGNAL_CONT; |
| 143 | |
| 144 | case OBSD_SIGCHLD: |
| 145 | return GDB_SIGNAL_CHLD; |
| 146 | |
| 147 | case OBSD_SIGTTIN: |
| 148 | return GDB_SIGNAL_TTIN; |
| 149 | |
| 150 | case OBSD_SIGTTOU: |
| 151 | return GDB_SIGNAL_TTOU; |
| 152 | |
| 153 | case OBSD_SIGIO: |
| 154 | return GDB_SIGNAL_IO; |
| 155 | |
| 156 | case OBSD_SIGXCPU: |
| 157 | return GDB_SIGNAL_XCPU; |
| 158 | |
| 159 | case OBSD_SIGXFSZ: |
| 160 | return GDB_SIGNAL_XFSZ; |
| 161 | |
| 162 | case OBSD_SIGVTALRM: |
| 163 | return GDB_SIGNAL_VTALRM; |
| 164 | |
| 165 | case OBSD_SIGPROF: |
| 166 | return GDB_SIGNAL_PROF; |
| 167 | |
| 168 | case OBSD_SIGWINCH: |
| 169 | return GDB_SIGNAL_WINCH; |
| 170 | |
| 171 | case OBSD_SIGINFO: |
| 172 | return GDB_SIGNAL_INFO; |
| 173 | |
| 174 | case OBSD_SIGUSR1: |
| 175 | return GDB_SIGNAL_USR1; |
| 176 | |
| 177 | case OBSD_SIGUSR2: |
| 178 | return GDB_SIGNAL_USR2; |
| 179 | } |
| 180 | |
| 181 | return GDB_SIGNAL_UNKNOWN; |
| 182 | } |
| 183 | |
| 184 | /* Implement the "gdb_signal_to_target" gdbarch method. */ |
| 185 | |
| 186 | static int |
| 187 | obsd_gdb_signal_to_target (struct gdbarch *gdbarch, |
| 188 | enum gdb_signal signal) |
| 189 | { |
| 190 | switch (signal) |
| 191 | { |
| 192 | case GDB_SIGNAL_0: |
| 193 | return 0; |
| 194 | |
| 195 | case GDB_SIGNAL_HUP: |
| 196 | return OBSD_SIGHUP; |
| 197 | |
| 198 | case GDB_SIGNAL_INT: |
| 199 | return OBSD_SIGINT; |
| 200 | |
| 201 | case GDB_SIGNAL_QUIT: |
| 202 | return OBSD_SIGQUIT; |
| 203 | |
| 204 | case GDB_SIGNAL_ILL: |
| 205 | return OBSD_SIGILL; |
| 206 | |
| 207 | case GDB_SIGNAL_TRAP: |
| 208 | return OBSD_SIGTRAP; |
| 209 | |
| 210 | case GDB_SIGNAL_ABRT: |
| 211 | return OBSD_SIGABRT; |
| 212 | |
| 213 | case GDB_SIGNAL_EMT: |
| 214 | return OBSD_SIGEMT; |
| 215 | |
| 216 | case GDB_SIGNAL_FPE: |
| 217 | return OBSD_SIGFPE; |
| 218 | |
| 219 | case GDB_SIGNAL_KILL: |
| 220 | return OBSD_SIGKILL; |
| 221 | |
| 222 | case GDB_SIGNAL_BUS: |
| 223 | return OBSD_SIGBUS; |
| 224 | |
| 225 | case GDB_SIGNAL_SEGV: |
| 226 | return OBSD_SIGSEGV; |
| 227 | |
| 228 | case GDB_SIGNAL_SYS: |
| 229 | return OBSD_SIGSYS; |
| 230 | |
| 231 | case GDB_SIGNAL_PIPE: |
| 232 | return OBSD_SIGPIPE; |
| 233 | |
| 234 | case GDB_SIGNAL_ALRM: |
| 235 | return OBSD_SIGALRM; |
| 236 | |
| 237 | case GDB_SIGNAL_TERM: |
| 238 | return OBSD_SIGTERM; |
| 239 | |
| 240 | case GDB_SIGNAL_URG: |
| 241 | return OBSD_SIGURG; |
| 242 | |
| 243 | case GDB_SIGNAL_STOP: |
| 244 | return OBSD_SIGSTOP; |
| 245 | |
| 246 | case GDB_SIGNAL_TSTP: |
| 247 | return OBSD_SIGTSTP; |
| 248 | |
| 249 | case GDB_SIGNAL_CONT: |
| 250 | return OBSD_SIGCONT; |
| 251 | |
| 252 | case GDB_SIGNAL_CHLD: |
| 253 | return OBSD_SIGCHLD; |
| 254 | |
| 255 | case GDB_SIGNAL_TTIN: |
| 256 | return OBSD_SIGTTIN; |
| 257 | |
| 258 | case GDB_SIGNAL_TTOU: |
| 259 | return OBSD_SIGTTOU; |
| 260 | |
| 261 | case GDB_SIGNAL_IO: |
| 262 | return OBSD_SIGIO; |
| 263 | |
| 264 | case GDB_SIGNAL_XCPU: |
| 265 | return OBSD_SIGXCPU; |
| 266 | |
| 267 | case GDB_SIGNAL_XFSZ: |
| 268 | return OBSD_SIGXFSZ; |
| 269 | |
| 270 | case GDB_SIGNAL_VTALRM: |
| 271 | return OBSD_SIGVTALRM; |
| 272 | |
| 273 | case GDB_SIGNAL_PROF: |
| 274 | return OBSD_SIGPROF; |
| 275 | |
| 276 | case GDB_SIGNAL_WINCH: |
| 277 | return OBSD_SIGWINCH; |
| 278 | |
| 279 | case GDB_SIGNAL_USR1: |
| 280 | return OBSD_SIGUSR1; |
| 281 | |
| 282 | case GDB_SIGNAL_USR2: |
| 283 | return OBSD_SIGUSR2; |
| 284 | |
| 285 | case GDB_SIGNAL_INFO: |
| 286 | return OBSD_SIGINFO; |
| 287 | } |
| 288 | |
| 289 | return -1; |
| 290 | } |
| 291 | |
| 292 | static int |
| 293 | obsd_auxv_parse (struct gdbarch *gdbarch, gdb_byte **readptr, |
| 294 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
| 295 | { |
| 296 | struct type *int_type = builtin_type (gdbarch)->builtin_int; |
| 297 | struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; |
| 298 | const int sizeof_auxv_type = TYPE_LENGTH (int_type); |
| 299 | const int sizeof_auxv_val = TYPE_LENGTH (ptr_type); |
| 300 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 301 | gdb_byte *ptr = *readptr; |
| 302 | |
| 303 | if (endptr == ptr) |
| 304 | return 0; |
| 305 | |
| 306 | if (endptr - ptr < 2 * sizeof_auxv_val) |
| 307 | return -1; |
| 308 | |
| 309 | *typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order); |
| 310 | ptr += sizeof_auxv_val; /* Alignment. */ |
| 311 | *valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order); |
| 312 | ptr += sizeof_auxv_val; |
| 313 | |
| 314 | *readptr = ptr; |
| 315 | return 1; |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| 320 | { |
| 321 | set_gdbarch_gdb_signal_from_target (gdbarch, |
| 322 | obsd_gdb_signal_from_target); |
| 323 | set_gdbarch_gdb_signal_to_target (gdbarch, |
| 324 | obsd_gdb_signal_to_target); |
| 325 | |
| 326 | /* Unlike Linux, OpenBSD actually follows the ELF standard. */ |
| 327 | set_gdbarch_auxv_parse (gdbarch, obsd_auxv_parse); |
| 328 | } |