| 1 | /* Native-dependent code for GNU/Linux x86-64. |
| 2 | |
| 3 | Copyright (C) 2001-2015 Free Software Foundation, Inc. |
| 4 | Contributed by Jiri Smid, SuSE Labs. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | #include "inferior.h" |
| 23 | #include "regcache.h" |
| 24 | #include "elf/common.h" |
| 25 | #include <sys/uio.h> |
| 26 | #include "nat/gdb_ptrace.h" |
| 27 | #include <asm/prctl.h> |
| 28 | #include <sys/reg.h> |
| 29 | #include "gregset.h" |
| 30 | #include "gdb_proc_service.h" |
| 31 | |
| 32 | #include "amd64-nat.h" |
| 33 | #include "linux-nat.h" |
| 34 | #include "amd64-tdep.h" |
| 35 | #include "amd64-linux-tdep.h" |
| 36 | #include "i386-linux-tdep.h" |
| 37 | #include "x86-xstate.h" |
| 38 | |
| 39 | #include "x86-linux-nat.h" |
| 40 | #include "nat/linux-ptrace.h" |
| 41 | |
| 42 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 |
| 43 | `struct user' format and GDB's register cache layout for GNU/Linux |
| 44 | i386. |
| 45 | |
| 46 | Note that most GNU/Linux x86-64 registers are 64-bit, while the |
| 47 | GNU/Linux i386 registers are all 32-bit, but since we're |
| 48 | little-endian we get away with that. */ |
| 49 | |
| 50 | /* From <sys/reg.h> on GNU/Linux i386. */ |
| 51 | static int amd64_linux_gregset32_reg_offset[] = |
| 52 | { |
| 53 | RAX * 8, RCX * 8, /* %eax, %ecx */ |
| 54 | RDX * 8, RBX * 8, /* %edx, %ebx */ |
| 55 | RSP * 8, RBP * 8, /* %esp, %ebp */ |
| 56 | RSI * 8, RDI * 8, /* %esi, %edi */ |
| 57 | RIP * 8, EFLAGS * 8, /* %eip, %eflags */ |
| 58 | CS * 8, SS * 8, /* %cs, %ss */ |
| 59 | DS * 8, ES * 8, /* %ds, %es */ |
| 60 | FS * 8, GS * 8, /* %fs, %gs */ |
| 61 | -1, -1, -1, -1, -1, -1, -1, -1, |
| 62 | -1, -1, -1, -1, -1, -1, -1, -1, |
| 63 | -1, -1, -1, -1, -1, -1, -1, -1, -1, |
| 64 | -1, -1, -1, -1, -1, -1, -1, -1, |
| 65 | -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */ |
| 66 | -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */ |
| 67 | -1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */ |
| 68 | -1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm7 (AVX512) */ |
| 69 | ORIG_RAX * 8 /* "orig_eax" */ |
| 70 | }; |
| 71 | \f |
| 72 | |
| 73 | /* Transfering the general-purpose registers between GDB, inferiors |
| 74 | and core files. */ |
| 75 | |
| 76 | /* Fill GDB's register cache with the general-purpose register values |
| 77 | in *GREGSETP. */ |
| 78 | |
| 79 | void |
| 80 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
| 81 | { |
| 82 | amd64_supply_native_gregset (regcache, gregsetp, -1); |
| 83 | } |
| 84 | |
| 85 | /* Fill register REGNUM (if it is a general-purpose register) in |
| 86 | *GREGSETP with the value in GDB's register cache. If REGNUM is -1, |
| 87 | do this for all registers. */ |
| 88 | |
| 89 | void |
| 90 | fill_gregset (const struct regcache *regcache, |
| 91 | elf_gregset_t *gregsetp, int regnum) |
| 92 | { |
| 93 | amd64_collect_native_gregset (regcache, gregsetp, regnum); |
| 94 | } |
| 95 | |
| 96 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
| 97 | |
| 98 | /* Fill GDB's register cache with the floating-point and SSE register |
| 99 | values in *FPREGSETP. */ |
| 100 | |
| 101 | void |
| 102 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
| 103 | { |
| 104 | amd64_supply_fxsave (regcache, -1, fpregsetp); |
| 105 | } |
| 106 | |
| 107 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
| 108 | *FPREGSETP with the value in GDB's register cache. If REGNUM is |
| 109 | -1, do this for all registers. */ |
| 110 | |
| 111 | void |
| 112 | fill_fpregset (const struct regcache *regcache, |
| 113 | elf_fpregset_t *fpregsetp, int regnum) |
| 114 | { |
| 115 | amd64_collect_fxsave (regcache, regnum, fpregsetp); |
| 116 | } |
| 117 | \f |
| 118 | |
| 119 | /* Transferring arbitrary registers between GDB and inferior. */ |
| 120 | |
| 121 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
| 122 | this for all registers (including the floating point and SSE |
| 123 | registers). */ |
| 124 | |
| 125 | static void |
| 126 | amd64_linux_fetch_inferior_registers (struct target_ops *ops, |
| 127 | struct regcache *regcache, int regnum) |
| 128 | { |
| 129 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 130 | int tid; |
| 131 | |
| 132 | /* GNU/Linux LWP ID's are process ID's. */ |
| 133 | tid = ptid_get_lwp (inferior_ptid); |
| 134 | if (tid == 0) |
| 135 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
| 136 | |
| 137 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 138 | { |
| 139 | elf_gregset_t regs; |
| 140 | |
| 141 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) |
| 142 | perror_with_name (_("Couldn't get registers")); |
| 143 | |
| 144 | amd64_supply_native_gregset (regcache, ®s, -1); |
| 145 | if (regnum != -1) |
| 146 | return; |
| 147 | } |
| 148 | |
| 149 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 150 | { |
| 151 | elf_fpregset_t fpregs; |
| 152 | |
| 153 | if (have_ptrace_getregset == TRIBOOL_TRUE) |
| 154 | { |
| 155 | char xstateregs[X86_XSTATE_MAX_SIZE]; |
| 156 | struct iovec iov; |
| 157 | |
| 158 | iov.iov_base = xstateregs; |
| 159 | iov.iov_len = sizeof (xstateregs); |
| 160 | if (ptrace (PTRACE_GETREGSET, tid, |
| 161 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) |
| 162 | perror_with_name (_("Couldn't get extended state status")); |
| 163 | |
| 164 | amd64_supply_xsave (regcache, -1, xstateregs); |
| 165 | } |
| 166 | else |
| 167 | { |
| 168 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) |
| 169 | perror_with_name (_("Couldn't get floating point status")); |
| 170 | |
| 171 | amd64_supply_fxsave (regcache, -1, &fpregs); |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | /* Store register REGNUM back into the child process. If REGNUM is |
| 177 | -1, do this for all registers (including the floating-point and SSE |
| 178 | registers). */ |
| 179 | |
| 180 | static void |
| 181 | amd64_linux_store_inferior_registers (struct target_ops *ops, |
| 182 | struct regcache *regcache, int regnum) |
| 183 | { |
| 184 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 185 | int tid; |
| 186 | |
| 187 | /* GNU/Linux LWP ID's are process ID's. */ |
| 188 | tid = ptid_get_lwp (inferior_ptid); |
| 189 | if (tid == 0) |
| 190 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
| 191 | |
| 192 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 193 | { |
| 194 | elf_gregset_t regs; |
| 195 | |
| 196 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) |
| 197 | perror_with_name (_("Couldn't get registers")); |
| 198 | |
| 199 | amd64_collect_native_gregset (regcache, ®s, regnum); |
| 200 | |
| 201 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) |
| 202 | perror_with_name (_("Couldn't write registers")); |
| 203 | |
| 204 | if (regnum != -1) |
| 205 | return; |
| 206 | } |
| 207 | |
| 208 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
| 209 | { |
| 210 | elf_fpregset_t fpregs; |
| 211 | |
| 212 | if (have_ptrace_getregset == TRIBOOL_TRUE) |
| 213 | { |
| 214 | char xstateregs[X86_XSTATE_MAX_SIZE]; |
| 215 | struct iovec iov; |
| 216 | |
| 217 | iov.iov_base = xstateregs; |
| 218 | iov.iov_len = sizeof (xstateregs); |
| 219 | if (ptrace (PTRACE_GETREGSET, tid, |
| 220 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) |
| 221 | perror_with_name (_("Couldn't get extended state status")); |
| 222 | |
| 223 | amd64_collect_xsave (regcache, regnum, xstateregs, 0); |
| 224 | |
| 225 | if (ptrace (PTRACE_SETREGSET, tid, |
| 226 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) |
| 227 | perror_with_name (_("Couldn't write extended state status")); |
| 228 | } |
| 229 | else |
| 230 | { |
| 231 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) |
| 232 | perror_with_name (_("Couldn't get floating point status")); |
| 233 | |
| 234 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
| 235 | |
| 236 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) |
| 237 | perror_with_name (_("Couldn't write floating point status")); |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | \f |
| 242 | |
| 243 | /* This function is called by libthread_db as part of its handling of |
| 244 | a request for a thread's local storage address. */ |
| 245 | |
| 246 | ps_err_e |
| 247 | ps_get_thread_area (const struct ps_prochandle *ph, |
| 248 | lwpid_t lwpid, int idx, void **base) |
| 249 | { |
| 250 | if (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 32) |
| 251 | { |
| 252 | unsigned int base_addr; |
| 253 | ps_err_e result; |
| 254 | |
| 255 | result = x86_linux_get_thread_area (lwpid, (void *) (long) idx, |
| 256 | &base_addr); |
| 257 | if (result == PS_OK) |
| 258 | { |
| 259 | /* Extend the value to 64 bits. Here it's assumed that |
| 260 | a "long" and a "void *" are the same. */ |
| 261 | (*base) = (void *) (long) base_addr; |
| 262 | } |
| 263 | return result; |
| 264 | } |
| 265 | else |
| 266 | { |
| 267 | /* This definition comes from prctl.h, but some kernels may not |
| 268 | have it. */ |
| 269 | #ifndef PTRACE_ARCH_PRCTL |
| 270 | #define PTRACE_ARCH_PRCTL 30 |
| 271 | #endif |
| 272 | /* FIXME: ezannoni-2003-07-09 see comment above about include |
| 273 | file order. We could be getting bogus values for these two. */ |
| 274 | gdb_assert (FS < ELF_NGREG); |
| 275 | gdb_assert (GS < ELF_NGREG); |
| 276 | switch (idx) |
| 277 | { |
| 278 | case FS: |
| 279 | #ifdef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE |
| 280 | { |
| 281 | /* PTRACE_ARCH_PRCTL is obsolete since 2.6.25, where the |
| 282 | fs_base and gs_base fields of user_regs_struct can be |
| 283 | used directly. */ |
| 284 | unsigned long fs; |
| 285 | errno = 0; |
| 286 | fs = ptrace (PTRACE_PEEKUSER, lwpid, |
| 287 | offsetof (struct user_regs_struct, fs_base), 0); |
| 288 | if (errno == 0) |
| 289 | { |
| 290 | *base = (void *) fs; |
| 291 | return PS_OK; |
| 292 | } |
| 293 | } |
| 294 | #endif |
| 295 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) |
| 296 | return PS_OK; |
| 297 | break; |
| 298 | case GS: |
| 299 | #ifdef HAVE_STRUCT_USER_REGS_STRUCT_GS_BASE |
| 300 | { |
| 301 | unsigned long gs; |
| 302 | errno = 0; |
| 303 | gs = ptrace (PTRACE_PEEKUSER, lwpid, |
| 304 | offsetof (struct user_regs_struct, gs_base), 0); |
| 305 | if (errno == 0) |
| 306 | { |
| 307 | *base = (void *) gs; |
| 308 | return PS_OK; |
| 309 | } |
| 310 | } |
| 311 | #endif |
| 312 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) |
| 313 | return PS_OK; |
| 314 | break; |
| 315 | default: /* Should not happen. */ |
| 316 | return PS_BADADDR; |
| 317 | } |
| 318 | } |
| 319 | return PS_ERR; /* ptrace failed. */ |
| 320 | } |
| 321 | \f |
| 322 | |
| 323 | /* When GDB is built as a 64-bit application on linux, the |
| 324 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since |
| 325 | debugging a 32-bit inferior with a 64-bit GDB should look the same |
| 326 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit |
| 327 | conversion in-place ourselves. */ |
| 328 | |
| 329 | /* These types below (compat_*) define a siginfo type that is layout |
| 330 | compatible with the siginfo type exported by the 32-bit userspace |
| 331 | support. */ |
| 332 | |
| 333 | typedef int compat_int_t; |
| 334 | typedef unsigned int compat_uptr_t; |
| 335 | |
| 336 | typedef int compat_time_t; |
| 337 | typedef int compat_timer_t; |
| 338 | typedef int compat_clock_t; |
| 339 | |
| 340 | struct compat_timeval |
| 341 | { |
| 342 | compat_time_t tv_sec; |
| 343 | int tv_usec; |
| 344 | }; |
| 345 | |
| 346 | typedef union compat_sigval |
| 347 | { |
| 348 | compat_int_t sival_int; |
| 349 | compat_uptr_t sival_ptr; |
| 350 | } compat_sigval_t; |
| 351 | |
| 352 | typedef struct compat_siginfo |
| 353 | { |
| 354 | int si_signo; |
| 355 | int si_errno; |
| 356 | int si_code; |
| 357 | |
| 358 | union |
| 359 | { |
| 360 | int _pad[((128 / sizeof (int)) - 3)]; |
| 361 | |
| 362 | /* kill() */ |
| 363 | struct |
| 364 | { |
| 365 | unsigned int _pid; |
| 366 | unsigned int _uid; |
| 367 | } _kill; |
| 368 | |
| 369 | /* POSIX.1b timers */ |
| 370 | struct |
| 371 | { |
| 372 | compat_timer_t _tid; |
| 373 | int _overrun; |
| 374 | compat_sigval_t _sigval; |
| 375 | } _timer; |
| 376 | |
| 377 | /* POSIX.1b signals */ |
| 378 | struct |
| 379 | { |
| 380 | unsigned int _pid; |
| 381 | unsigned int _uid; |
| 382 | compat_sigval_t _sigval; |
| 383 | } _rt; |
| 384 | |
| 385 | /* SIGCHLD */ |
| 386 | struct |
| 387 | { |
| 388 | unsigned int _pid; |
| 389 | unsigned int _uid; |
| 390 | int _status; |
| 391 | compat_clock_t _utime; |
| 392 | compat_clock_t _stime; |
| 393 | } _sigchld; |
| 394 | |
| 395 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ |
| 396 | struct |
| 397 | { |
| 398 | unsigned int _addr; |
| 399 | } _sigfault; |
| 400 | |
| 401 | /* SIGPOLL */ |
| 402 | struct |
| 403 | { |
| 404 | int _band; |
| 405 | int _fd; |
| 406 | } _sigpoll; |
| 407 | } _sifields; |
| 408 | } compat_siginfo_t; |
| 409 | |
| 410 | /* For x32, clock_t in _sigchld is 64bit aligned at 4 bytes. */ |
| 411 | typedef struct compat_x32_clock |
| 412 | { |
| 413 | int lower; |
| 414 | int upper; |
| 415 | } compat_x32_clock_t; |
| 416 | |
| 417 | typedef struct compat_x32_siginfo |
| 418 | { |
| 419 | int si_signo; |
| 420 | int si_errno; |
| 421 | int si_code; |
| 422 | |
| 423 | union |
| 424 | { |
| 425 | int _pad[((128 / sizeof (int)) - 3)]; |
| 426 | |
| 427 | /* kill() */ |
| 428 | struct |
| 429 | { |
| 430 | unsigned int _pid; |
| 431 | unsigned int _uid; |
| 432 | } _kill; |
| 433 | |
| 434 | /* POSIX.1b timers */ |
| 435 | struct |
| 436 | { |
| 437 | compat_timer_t _tid; |
| 438 | int _overrun; |
| 439 | compat_sigval_t _sigval; |
| 440 | } _timer; |
| 441 | |
| 442 | /* POSIX.1b signals */ |
| 443 | struct |
| 444 | { |
| 445 | unsigned int _pid; |
| 446 | unsigned int _uid; |
| 447 | compat_sigval_t _sigval; |
| 448 | } _rt; |
| 449 | |
| 450 | /* SIGCHLD */ |
| 451 | struct |
| 452 | { |
| 453 | unsigned int _pid; |
| 454 | unsigned int _uid; |
| 455 | int _status; |
| 456 | compat_x32_clock_t _utime; |
| 457 | compat_x32_clock_t _stime; |
| 458 | } _sigchld; |
| 459 | |
| 460 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ |
| 461 | struct |
| 462 | { |
| 463 | unsigned int _addr; |
| 464 | } _sigfault; |
| 465 | |
| 466 | /* SIGPOLL */ |
| 467 | struct |
| 468 | { |
| 469 | int _band; |
| 470 | int _fd; |
| 471 | } _sigpoll; |
| 472 | } _sifields; |
| 473 | } compat_x32_siginfo_t; |
| 474 | |
| 475 | #define cpt_si_pid _sifields._kill._pid |
| 476 | #define cpt_si_uid _sifields._kill._uid |
| 477 | #define cpt_si_timerid _sifields._timer._tid |
| 478 | #define cpt_si_overrun _sifields._timer._overrun |
| 479 | #define cpt_si_status _sifields._sigchld._status |
| 480 | #define cpt_si_utime _sifields._sigchld._utime |
| 481 | #define cpt_si_stime _sifields._sigchld._stime |
| 482 | #define cpt_si_ptr _sifields._rt._sigval.sival_ptr |
| 483 | #define cpt_si_addr _sifields._sigfault._addr |
| 484 | #define cpt_si_band _sifields._sigpoll._band |
| 485 | #define cpt_si_fd _sifields._sigpoll._fd |
| 486 | |
| 487 | /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun. |
| 488 | In their place is si_timer1,si_timer2. */ |
| 489 | #ifndef si_timerid |
| 490 | #define si_timerid si_timer1 |
| 491 | #endif |
| 492 | #ifndef si_overrun |
| 493 | #define si_overrun si_timer2 |
| 494 | #endif |
| 495 | |
| 496 | static void |
| 497 | compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) |
| 498 | { |
| 499 | memset (to, 0, sizeof (*to)); |
| 500 | |
| 501 | to->si_signo = from->si_signo; |
| 502 | to->si_errno = from->si_errno; |
| 503 | to->si_code = from->si_code; |
| 504 | |
| 505 | if (to->si_code == SI_TIMER) |
| 506 | { |
| 507 | to->cpt_si_timerid = from->si_timerid; |
| 508 | to->cpt_si_overrun = from->si_overrun; |
| 509 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 510 | } |
| 511 | else if (to->si_code == SI_USER) |
| 512 | { |
| 513 | to->cpt_si_pid = from->si_pid; |
| 514 | to->cpt_si_uid = from->si_uid; |
| 515 | } |
| 516 | else if (to->si_code < 0) |
| 517 | { |
| 518 | to->cpt_si_pid = from->si_pid; |
| 519 | to->cpt_si_uid = from->si_uid; |
| 520 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 521 | } |
| 522 | else |
| 523 | { |
| 524 | switch (to->si_signo) |
| 525 | { |
| 526 | case SIGCHLD: |
| 527 | to->cpt_si_pid = from->si_pid; |
| 528 | to->cpt_si_uid = from->si_uid; |
| 529 | to->cpt_si_status = from->si_status; |
| 530 | to->cpt_si_utime = from->si_utime; |
| 531 | to->cpt_si_stime = from->si_stime; |
| 532 | break; |
| 533 | case SIGILL: |
| 534 | case SIGFPE: |
| 535 | case SIGSEGV: |
| 536 | case SIGBUS: |
| 537 | to->cpt_si_addr = (intptr_t) from->si_addr; |
| 538 | break; |
| 539 | case SIGPOLL: |
| 540 | to->cpt_si_band = from->si_band; |
| 541 | to->cpt_si_fd = from->si_fd; |
| 542 | break; |
| 543 | default: |
| 544 | to->cpt_si_pid = from->si_pid; |
| 545 | to->cpt_si_uid = from->si_uid; |
| 546 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 547 | break; |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | |
| 552 | static void |
| 553 | siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) |
| 554 | { |
| 555 | memset (to, 0, sizeof (*to)); |
| 556 | |
| 557 | to->si_signo = from->si_signo; |
| 558 | to->si_errno = from->si_errno; |
| 559 | to->si_code = from->si_code; |
| 560 | |
| 561 | if (to->si_code == SI_TIMER) |
| 562 | { |
| 563 | to->si_timerid = from->cpt_si_timerid; |
| 564 | to->si_overrun = from->cpt_si_overrun; |
| 565 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
| 566 | } |
| 567 | else if (to->si_code == SI_USER) |
| 568 | { |
| 569 | to->si_pid = from->cpt_si_pid; |
| 570 | to->si_uid = from->cpt_si_uid; |
| 571 | } |
| 572 | if (to->si_code < 0) |
| 573 | { |
| 574 | to->si_pid = from->cpt_si_pid; |
| 575 | to->si_uid = from->cpt_si_uid; |
| 576 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
| 577 | } |
| 578 | else |
| 579 | { |
| 580 | switch (to->si_signo) |
| 581 | { |
| 582 | case SIGCHLD: |
| 583 | to->si_pid = from->cpt_si_pid; |
| 584 | to->si_uid = from->cpt_si_uid; |
| 585 | to->si_status = from->cpt_si_status; |
| 586 | to->si_utime = from->cpt_si_utime; |
| 587 | to->si_stime = from->cpt_si_stime; |
| 588 | break; |
| 589 | case SIGILL: |
| 590 | case SIGFPE: |
| 591 | case SIGSEGV: |
| 592 | case SIGBUS: |
| 593 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; |
| 594 | break; |
| 595 | case SIGPOLL: |
| 596 | to->si_band = from->cpt_si_band; |
| 597 | to->si_fd = from->cpt_si_fd; |
| 598 | break; |
| 599 | default: |
| 600 | to->si_pid = from->cpt_si_pid; |
| 601 | to->si_uid = from->cpt_si_uid; |
| 602 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; |
| 603 | break; |
| 604 | } |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | static void |
| 609 | compat_x32_siginfo_from_siginfo (compat_x32_siginfo_t *to, |
| 610 | siginfo_t *from) |
| 611 | { |
| 612 | memset (to, 0, sizeof (*to)); |
| 613 | |
| 614 | to->si_signo = from->si_signo; |
| 615 | to->si_errno = from->si_errno; |
| 616 | to->si_code = from->si_code; |
| 617 | |
| 618 | if (to->si_code == SI_TIMER) |
| 619 | { |
| 620 | to->cpt_si_timerid = from->si_timerid; |
| 621 | to->cpt_si_overrun = from->si_overrun; |
| 622 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 623 | } |
| 624 | else if (to->si_code == SI_USER) |
| 625 | { |
| 626 | to->cpt_si_pid = from->si_pid; |
| 627 | to->cpt_si_uid = from->si_uid; |
| 628 | } |
| 629 | else if (to->si_code < 0) |
| 630 | { |
| 631 | to->cpt_si_pid = from->si_pid; |
| 632 | to->cpt_si_uid = from->si_uid; |
| 633 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 634 | } |
| 635 | else |
| 636 | { |
| 637 | switch (to->si_signo) |
| 638 | { |
| 639 | case SIGCHLD: |
| 640 | to->cpt_si_pid = from->si_pid; |
| 641 | to->cpt_si_uid = from->si_uid; |
| 642 | to->cpt_si_status = from->si_status; |
| 643 | memcpy (&to->cpt_si_utime, &from->si_utime, |
| 644 | sizeof (to->cpt_si_utime)); |
| 645 | memcpy (&to->cpt_si_stime, &from->si_stime, |
| 646 | sizeof (to->cpt_si_stime)); |
| 647 | break; |
| 648 | case SIGILL: |
| 649 | case SIGFPE: |
| 650 | case SIGSEGV: |
| 651 | case SIGBUS: |
| 652 | to->cpt_si_addr = (intptr_t) from->si_addr; |
| 653 | break; |
| 654 | case SIGPOLL: |
| 655 | to->cpt_si_band = from->si_band; |
| 656 | to->cpt_si_fd = from->si_fd; |
| 657 | break; |
| 658 | default: |
| 659 | to->cpt_si_pid = from->si_pid; |
| 660 | to->cpt_si_uid = from->si_uid; |
| 661 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
| 662 | break; |
| 663 | } |
| 664 | } |
| 665 | } |
| 666 | |
| 667 | static void |
| 668 | siginfo_from_compat_x32_siginfo (siginfo_t *to, |
| 669 | compat_x32_siginfo_t *from) |
| 670 | { |
| 671 | memset (to, 0, sizeof (*to)); |
| 672 | |
| 673 | to->si_signo = from->si_signo; |
| 674 | to->si_errno = from->si_errno; |
| 675 | to->si_code = from->si_code; |
| 676 | |
| 677 | if (to->si_code == SI_TIMER) |
| 678 | { |
| 679 | to->si_timerid = from->cpt_si_timerid; |
| 680 | to->si_overrun = from->cpt_si_overrun; |
| 681 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
| 682 | } |
| 683 | else if (to->si_code == SI_USER) |
| 684 | { |
| 685 | to->si_pid = from->cpt_si_pid; |
| 686 | to->si_uid = from->cpt_si_uid; |
| 687 | } |
| 688 | if (to->si_code < 0) |
| 689 | { |
| 690 | to->si_pid = from->cpt_si_pid; |
| 691 | to->si_uid = from->cpt_si_uid; |
| 692 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
| 693 | } |
| 694 | else |
| 695 | { |
| 696 | switch (to->si_signo) |
| 697 | { |
| 698 | case SIGCHLD: |
| 699 | to->si_pid = from->cpt_si_pid; |
| 700 | to->si_uid = from->cpt_si_uid; |
| 701 | to->si_status = from->cpt_si_status; |
| 702 | memcpy (&to->si_utime, &from->cpt_si_utime, |
| 703 | sizeof (to->si_utime)); |
| 704 | memcpy (&to->si_stime, &from->cpt_si_stime, |
| 705 | sizeof (to->si_stime)); |
| 706 | break; |
| 707 | case SIGILL: |
| 708 | case SIGFPE: |
| 709 | case SIGSEGV: |
| 710 | case SIGBUS: |
| 711 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; |
| 712 | break; |
| 713 | case SIGPOLL: |
| 714 | to->si_band = from->cpt_si_band; |
| 715 | to->si_fd = from->cpt_si_fd; |
| 716 | break; |
| 717 | default: |
| 718 | to->si_pid = from->cpt_si_pid; |
| 719 | to->si_uid = from->cpt_si_uid; |
| 720 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; |
| 721 | break; |
| 722 | } |
| 723 | } |
| 724 | } |
| 725 | |
| 726 | /* Convert a native/host siginfo object, into/from the siginfo in the |
| 727 | layout of the inferiors' architecture. Returns true if any |
| 728 | conversion was done; false otherwise. If DIRECTION is 1, then copy |
| 729 | from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to |
| 730 | INF. */ |
| 731 | |
| 732 | static int |
| 733 | amd64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction) |
| 734 | { |
| 735 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); |
| 736 | |
| 737 | /* Is the inferior 32-bit? If so, then do fixup the siginfo |
| 738 | object. */ |
| 739 | if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32) |
| 740 | { |
| 741 | gdb_assert (sizeof (siginfo_t) == sizeof (compat_siginfo_t)); |
| 742 | |
| 743 | if (direction == 0) |
| 744 | compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native); |
| 745 | else |
| 746 | siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); |
| 747 | |
| 748 | return 1; |
| 749 | } |
| 750 | /* No fixup for native x32 GDB. */ |
| 751 | else if (gdbarch_addr_bit (gdbarch) == 32 && sizeof (void *) == 8) |
| 752 | { |
| 753 | gdb_assert (sizeof (siginfo_t) == sizeof (compat_x32_siginfo_t)); |
| 754 | |
| 755 | if (direction == 0) |
| 756 | compat_x32_siginfo_from_siginfo ((struct compat_x32_siginfo *) inf, |
| 757 | native); |
| 758 | else |
| 759 | siginfo_from_compat_x32_siginfo (native, |
| 760 | (struct compat_x32_siginfo *) inf); |
| 761 | |
| 762 | return 1; |
| 763 | } |
| 764 | else |
| 765 | return 0; |
| 766 | } |
| 767 | \f |
| 768 | |
| 769 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
| 770 | void _initialize_amd64_linux_nat (void); |
| 771 | |
| 772 | void |
| 773 | _initialize_amd64_linux_nat (void) |
| 774 | { |
| 775 | struct target_ops *t; |
| 776 | |
| 777 | amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset; |
| 778 | amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS; |
| 779 | amd64_native_gregset64_reg_offset = amd64_linux_gregset_reg_offset; |
| 780 | amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS; |
| 781 | |
| 782 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset) |
| 783 | == amd64_native_gregset32_num_regs); |
| 784 | |
| 785 | /* Create a generic x86 GNU/Linux target. */ |
| 786 | t = x86_linux_create_target (); |
| 787 | |
| 788 | /* Add our register access methods. */ |
| 789 | t->to_fetch_registers = amd64_linux_fetch_inferior_registers; |
| 790 | t->to_store_registers = amd64_linux_store_inferior_registers; |
| 791 | |
| 792 | /* Add the target. */ |
| 793 | x86_linux_add_target (t); |
| 794 | |
| 795 | /* Add our siginfo layout converter. */ |
| 796 | linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup); |
| 797 | } |