gdb/aarch64-linux-tdep.c

   1 /* Target-dependent code for GNU/Linux AArch64.
   2
   3    Copyright (C) 2009-2018 Free Software Foundation, Inc.
   4    Contributed by ARM Ltd.
   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
  23 #include "gdbarch.h"
  24 #include "arch-utils.h"
  25 #include "glibc-tdep.h"
  26 #include "linux-tdep.h"
  27 #include "aarch64-tdep.h"
  28 #include "aarch64-linux-tdep.h"
  29 #include "osabi.h"
  30 #include "solib-svr4.h"
  31 #include "symtab.h"
  32 #include "tramp-frame.h"
  33 #include "trad-frame.h"
  34
  35 #include "inferior.h"
  36 #include "regcache.h"
  37 #include "regset.h"
  38
  39 #include "cli/cli-utils.h"
  40 #include "stap-probe.h"
  41 #include "parser-defs.h"
  42 #include "user-regs.h"
  43 #include "xml-syscall.h"
  44 #include <ctype.h>
  45
  46 #include "record-full.h"
  47 #include "linux-record.h"
  48 #include "auxv.h"
  49 #include "elf/common.h"
  50
  51 /* Signal frame handling.
  52
  53       +------------+  ^
  54       | saved lr   |  |
  55    +->| saved fp   |--+
  56    |  |            |
  57    |  |            |
  58    |  +------------+
  59    |  | saved lr   |
  60    +--| saved fp   |
  61    ^  |            |
  62    |  |            |
  63    |  +------------+
  64    ^  |            |
  65    |  | signal     |
  66    |  |            |        SIGTRAMP_FRAME (struct rt_sigframe)
  67    |  | saved regs |
  68    +--| saved sp   |--> interrupted_sp
  69    |  | saved pc   |--> interrupted_pc
  70    |  |            |
  71    |  +------------+
  72    |  | saved lr   |--> default_restorer (movz x8, NR_sys_rt_sigreturn; svc 0)
  73    +--| saved fp   |<- FP
  74       |            |         NORMAL_FRAME
  75       |            |<- SP
  76       +------------+
  77
  78   On signal delivery, the kernel will create a signal handler stack
  79   frame and setup the return address in LR to point at restorer stub.
  80   The signal stack frame is defined by:
  81
  82   struct rt_sigframe
  83   {
  84     siginfo_t info;
  85     struct ucontext uc;
  86   };
  87
  88   typedef struct
  89   {
  90     ...                                    128 bytes
  91   } siginfo_t;
  92
  93   The ucontext has the following form:
  94   struct ucontext
  95   {
  96     unsigned long uc_flags;
  97     struct ucontext *uc_link;
  98     stack_t uc_stack;
  99     sigset_t uc_sigmask;
 100     struct sigcontext uc_mcontext;
 101   };
 102
 103   typedef struct sigaltstack
 104   {
 105     void *ss_sp;
 106     int ss_flags;
 107     size_t ss_size;
 108   } stack_t;
 109
 110   struct sigcontext
 111   {
 112     unsigned long fault_address;
 113     unsigned long regs[31];
 114     unsigned long sp;           / * 31 * /
 115     unsigned long pc;           / * 32 * /
 116     unsigned long pstate;       / * 33 * /
 117     __u8 __reserved[4096]
 118   };
 119
 120   The restorer stub will always have the form:
 121
 122   d28015a8        movz    x8, #0xad
 123   d4000001        svc     #0x0
 124
 125   This is a system call sys_rt_sigreturn.
 126
 127   We detect signal frames by snooping the return code for the restorer
 128   instruction sequence.
 129
 130   The handler then needs to recover the saved register set from
 131   ucontext.uc_mcontext.  */
 132
 133 /* These magic numbers need to reflect the layout of the kernel
 134    defined struct rt_sigframe and ucontext.  */
 135 #define AARCH64_SIGCONTEXT_REG_SIZE             8
 136 #define AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET     128
 137 #define AARCH64_UCONTEXT_SIGCONTEXT_OFFSET      176
 138 #define AARCH64_SIGCONTEXT_XO_OFFSET            8
 139
 140 /* Implement the "init" method of struct tramp_frame.  */
 141
 142 static void
 143 aarch64_linux_sigframe_init (const struct tramp_frame *self,
 144                              struct frame_info *this_frame,
 145                              struct trad_frame_cache *this_cache,
 146                              CORE_ADDR func)
 147 {
 148   CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
 149   CORE_ADDR sigcontext_addr =
 150     sp
 151     + AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
 152     + AARCH64_UCONTEXT_SIGCONTEXT_OFFSET;
 153   int i;
 154
 155   for (i = 0; i < 31; i++)
 156     {
 157       trad_frame_set_reg_addr (this_cache,
 158                                AARCH64_X0_REGNUM + i,
 159                                sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
 160                                + i * AARCH64_SIGCONTEXT_REG_SIZE);
 161     }
 162   trad_frame_set_reg_addr (this_cache, AARCH64_SP_REGNUM,
 163                            sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
 164                              + 31 * AARCH64_SIGCONTEXT_REG_SIZE);
 165   trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM,
 166                            sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
 167                              + 32 * AARCH64_SIGCONTEXT_REG_SIZE);
 168
 169   trad_frame_set_id (this_cache, frame_id_build (sp, func));
 170 }
 171
 172 static const struct tramp_frame aarch64_linux_rt_sigframe =
 173 {
 174   SIGTRAMP_FRAME,
 175   4,
 176   {
 177     /* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
 178        Soo1 0010 1hhi iiii iiii iiii iiir rrrr  */
 179     {0xd2801168, -1},
 180
 181     /* svc  0x0      (o=0, l=1)
 182        1101 0100 oooi iiii iiii iiii iii0 00ll  */
 183     {0xd4000001, -1},
 184     {TRAMP_SENTINEL_INSN, -1}
 185   },
 186   aarch64_linux_sigframe_init
 187 };
 188
 189 /* Register maps.  */
 190
 191 static const struct regcache_map_entry aarch64_linux_gregmap[] =
 192   {
 193     { 31, AARCH64_X0_REGNUM, 8 }, /* x0 ... x30 */
 194     { 1, AARCH64_SP_REGNUM, 8 },
 195     { 1, AARCH64_PC_REGNUM, 8 },
 196     { 1, AARCH64_CPSR_REGNUM, 8 },
 197     { 0 }
 198   };
 199
 200 static const struct regcache_map_entry aarch64_linux_fpregmap[] =
 201   {
 202     { 32, AARCH64_V0_REGNUM, 16 }, /* v0 ... v31 */
 203     { 1, AARCH64_FPSR_REGNUM, 4 },
 204     { 1, AARCH64_FPCR_REGNUM, 4 },
 205     { 0 }
 206   };
 207
 208 /* Register set definitions.  */
 209
 210 const struct regset aarch64_linux_gregset =
 211   {
 212     aarch64_linux_gregmap,
 213     regcache_supply_regset, regcache_collect_regset
 214   };
 215
 216 const struct regset aarch64_linux_fpregset =
 217   {
 218     aarch64_linux_fpregmap,
 219     regcache_supply_regset, regcache_collect_regset
 220   };
 221
 222 /* Implement the "regset_from_core_section" gdbarch method.  */
 223
 224 static void
 225 aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
 226                                             iterate_over_regset_sections_cb *cb,
 227                                             void *cb_data,
 228                                             const struct regcache *regcache)
 229 {
 230   cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, &aarch64_linux_gregset,
 231       NULL, cb_data);
 232   cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, &aarch64_linux_fpregset,
 233       NULL, cb_data);
 234 }
 235
 236 /* Implement the "core_read_description" gdbarch method.  */
 237
 238 static const struct target_desc *
 239 aarch64_linux_core_read_description (struct gdbarch *gdbarch,
 240                                      struct target_ops *target, bfd *abfd)
 241 {
 242   CORE_ADDR aarch64_hwcap = 0;
 243
 244   if (target_auxv_search (target, AT_HWCAP, &aarch64_hwcap) != 1)
 245     return NULL;
 246
 247   return aarch64_read_description ();
 248 }
 249
 250 /* Implementation of `gdbarch_stap_is_single_operand', as defined in
 251    gdbarch.h.  */
 252
 253 static int
 254 aarch64_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
 255 {
 256   return (*s == '#' || isdigit (*s) /* Literal number.  */
 257           || *s == '[' /* Register indirection.  */
 258           || isalpha (*s)); /* Register value.  */
 259 }
 260
 261 /* This routine is used to parse a special token in AArch64's assembly.
 262
 263    The special tokens parsed by it are:
 264
 265       - Register displacement (e.g, [fp, #-8])
 266
 267    It returns one if the special token has been parsed successfully,
 268    or zero if the current token is not considered special.  */
 269
 270 static int
 271 aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
 272                                   struct stap_parse_info *p)
 273 {
 274   if (*p->arg == '[')
 275     {
 276       /* Temporary holder for lookahead.  */
 277       const char *tmp = p->arg;
 278       char *endp;
 279       /* Used to save the register name.  */
 280       const char *start;
 281       char *regname;
 282       int len;
 283       int got_minus = 0;
 284       long displacement;
 285       struct stoken str;
 286
 287       ++tmp;
 288       start = tmp;
 289
 290       /* Register name.  */
 291       while (isalnum (*tmp))
 292         ++tmp;
 293
 294       if (*tmp != ',')
 295         return 0;
 296
 297       len = tmp - start;
 298       regname = (char *) alloca (len + 2);
 299
 300       strncpy (regname, start, len);
 301       regname[len] = '\0';
 302
 303       if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1)
 304         error (_("Invalid register name `%s' on expression `%s'."),
 305                regname, p->saved_arg);
 306
 307       ++tmp;
 308       tmp = skip_spaces (tmp);
 309       /* Now we expect a number.  It can begin with '#' or simply
 310          a digit.  */
 311       if (*tmp == '#')
 312         ++tmp;
 313
 314       if (*tmp == '-')
 315         {
 316           ++tmp;
 317           got_minus = 1;
 318         }
 319       else if (*tmp == '+')
 320         ++tmp;
 321
 322       if (!isdigit (*tmp))
 323         return 0;
 324
 325       displacement = strtol (tmp, &endp, 10);
 326       tmp = endp;
 327
 328       /* Skipping last `]'.  */
 329       if (*tmp++ != ']')
 330         return 0;
 331
 332       /* The displacement.  */
 333       write_exp_elt_opcode (&p->pstate, OP_LONG);
 334       write_exp_elt_type (&p->pstate, builtin_type (gdbarch)->builtin_long);
 335       write_exp_elt_longcst (&p->pstate, displacement);
 336       write_exp_elt_opcode (&p->pstate, OP_LONG);
 337       if (got_minus)
 338         write_exp_elt_opcode (&p->pstate, UNOP_NEG);
 339
 340       /* The register name.  */
 341       write_exp_elt_opcode (&p->pstate, OP_REGISTER);
 342       str.ptr = regname;
 343       str.length = len;
 344       write_exp_string (&p->pstate, str);
 345       write_exp_elt_opcode (&p->pstate, OP_REGISTER);
 346
 347       write_exp_elt_opcode (&p->pstate, BINOP_ADD);
 348
 349       /* Casting to the expected type.  */
 350       write_exp_elt_opcode (&p->pstate, UNOP_CAST);
 351       write_exp_elt_type (&p->pstate, lookup_pointer_type (p->arg_type));
 352       write_exp_elt_opcode (&p->pstate, UNOP_CAST);
 353
 354       write_exp_elt_opcode (&p->pstate, UNOP_IND);
 355
 356       p->arg = tmp;
 357     }
 358   else
 359     return 0;
 360
 361   return 1;
 362 }
 363
 364 /* Implement the "get_syscall_number" gdbarch method.  */
 365
 366 static LONGEST
 367 aarch64_linux_get_syscall_number (struct gdbarch *gdbarch,
 368                                   ptid_t ptid)
 369 {
 370   struct regcache *regs = get_thread_regcache (ptid);
 371   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 372
 373   /* The content of register x8.  */
 374   gdb_byte buf[X_REGISTER_SIZE];
 375   /* The result.  */
 376   LONGEST ret;
 377
 378   /* Getting the system call number from the register x8.  */
 379   regcache_cooked_read (regs, AARCH64_DWARF_X0 + 8, buf);
 380
 381   ret = extract_signed_integer (buf, X_REGISTER_SIZE, byte_order);
 382
 383   return ret;
 384 }
 385
 386 /* AArch64 process record-replay constructs: syscall, signal etc.  */
 387
 388 struct linux_record_tdep aarch64_linux_record_tdep;
 389
 390 /* Enum that defines the AArch64 linux specific syscall identifiers used for
 391    process record/replay.  */
 392
 393 enum aarch64_syscall {
 394   aarch64_sys_io_setup = 0,
 395   aarch64_sys_io_destroy = 1,
 396   aarch64_sys_io_submit = 2,
 397   aarch64_sys_io_cancel = 3,
 398   aarch64_sys_io_getevents = 4,
 399   aarch64_sys_setxattr = 5,
 400   aarch64_sys_lsetxattr = 6,
 401   aarch64_sys_fsetxattr = 7,
 402   aarch64_sys_getxattr = 8,
 403   aarch64_sys_lgetxattr = 9,
 404   aarch64_sys_fgetxattr = 10,
 405   aarch64_sys_listxattr = 11,
 406   aarch64_sys_llistxattr = 12,
 407   aarch64_sys_flistxattr = 13,
 408   aarch64_sys_removexattr = 14,
 409   aarch64_sys_lremovexattr = 15,
 410   aarch64_sys_fremovexattr = 16,
 411   aarch64_sys_getcwd = 17,
 412   aarch64_sys_lookup_dcookie = 18,
 413   aarch64_sys_eventfd2 = 19,
 414   aarch64_sys_epoll_create1 = 20,
 415   aarch64_sys_epoll_ctl = 21,
 416   aarch64_sys_epoll_pwait = 22,
 417   aarch64_sys_dup = 23,
 418   aarch64_sys_dup3 = 24,
 419   aarch64_sys_fcntl = 25,
 420   aarch64_sys_inotify_init1 = 26,
 421   aarch64_sys_inotify_add_watch = 27,
 422   aarch64_sys_inotify_rm_watch = 28,
 423   aarch64_sys_ioctl = 29,
 424   aarch64_sys_ioprio_set = 30,
 425   aarch64_sys_ioprio_get = 31,
 426   aarch64_sys_flock = 32,
 427   aarch64_sys_mknodat = 33,
 428   aarch64_sys_mkdirat = 34,
 429   aarch64_sys_unlinkat = 35,
 430   aarch64_sys_symlinkat = 36,
 431   aarch64_sys_linkat = 37,
 432   aarch64_sys_renameat = 38,
 433   aarch64_sys_umount2 = 39,
 434   aarch64_sys_mount = 40,
 435   aarch64_sys_pivot_root = 41,
 436   aarch64_sys_nfsservctl = 42,
 437   aarch64_sys_statfs = 43,
 438   aarch64_sys_fstatfs = 44,
 439   aarch64_sys_truncate = 45,
 440   aarch64_sys_ftruncate = 46,
 441   aarch64_sys_fallocate = 47,
 442   aarch64_sys_faccessat = 48,
 443   aarch64_sys_chdir = 49,
 444   aarch64_sys_fchdir = 50,
 445   aarch64_sys_chroot = 51,
 446   aarch64_sys_fchmod = 52,
 447   aarch64_sys_fchmodat = 53,
 448   aarch64_sys_fchownat = 54,
 449   aarch64_sys_fchown = 55,
 450   aarch64_sys_openat = 56,
 451   aarch64_sys_close = 57,
 452   aarch64_sys_vhangup = 58,
 453   aarch64_sys_pipe2 = 59,
 454   aarch64_sys_quotactl = 60,
 455   aarch64_sys_getdents64 = 61,
 456   aarch64_sys_lseek = 62,
 457   aarch64_sys_read = 63,
 458   aarch64_sys_write = 64,
 459   aarch64_sys_readv = 65,
 460   aarch64_sys_writev = 66,
 461   aarch64_sys_pread64 = 67,
 462   aarch64_sys_pwrite64 = 68,
 463   aarch64_sys_preadv = 69,
 464   aarch64_sys_pwritev = 70,
 465   aarch64_sys_sendfile = 71,
 466   aarch64_sys_pselect6 = 72,
 467   aarch64_sys_ppoll = 73,
 468   aarch64_sys_signalfd4 = 74,
 469   aarch64_sys_vmsplice = 75,
 470   aarch64_sys_splice = 76,
 471   aarch64_sys_tee = 77,
 472   aarch64_sys_readlinkat = 78,
 473   aarch64_sys_newfstatat = 79,
 474   aarch64_sys_fstat = 80,
 475   aarch64_sys_sync = 81,
 476   aarch64_sys_fsync = 82,
 477   aarch64_sys_fdatasync = 83,
 478   aarch64_sys_sync_file_range2 = 84,
 479   aarch64_sys_sync_file_range = 84,
 480   aarch64_sys_timerfd_create = 85,
 481   aarch64_sys_timerfd_settime = 86,
 482   aarch64_sys_timerfd_gettime = 87,
 483   aarch64_sys_utimensat = 88,
 484   aarch64_sys_acct = 89,
 485   aarch64_sys_capget = 90,
 486   aarch64_sys_capset = 91,
 487   aarch64_sys_personality = 92,
 488   aarch64_sys_exit = 93,
 489   aarch64_sys_exit_group = 94,
 490   aarch64_sys_waitid = 95,
 491   aarch64_sys_set_tid_address = 96,
 492   aarch64_sys_unshare = 97,
 493   aarch64_sys_futex = 98,
 494   aarch64_sys_set_robust_list = 99,
 495   aarch64_sys_get_robust_list = 100,
 496   aarch64_sys_nanosleep = 101,
 497   aarch64_sys_getitimer = 102,
 498   aarch64_sys_setitimer = 103,
 499   aarch64_sys_kexec_load = 104,
 500   aarch64_sys_init_module = 105,
 501   aarch64_sys_delete_module = 106,
 502   aarch64_sys_timer_create = 107,
 503   aarch64_sys_timer_gettime = 108,
 504   aarch64_sys_timer_getoverrun = 109,
 505   aarch64_sys_timer_settime = 110,
 506   aarch64_sys_timer_delete = 111,
 507   aarch64_sys_clock_settime = 112,
 508   aarch64_sys_clock_gettime = 113,
 509   aarch64_sys_clock_getres = 114,
 510   aarch64_sys_clock_nanosleep = 115,
 511   aarch64_sys_syslog = 116,
 512   aarch64_sys_ptrace = 117,
 513   aarch64_sys_sched_setparam = 118,
 514   aarch64_sys_sched_setscheduler = 119,
 515   aarch64_sys_sched_getscheduler = 120,
 516   aarch64_sys_sched_getparam = 121,
 517   aarch64_sys_sched_setaffinity = 122,
 518   aarch64_sys_sched_getaffinity = 123,
 519   aarch64_sys_sched_yield = 124,
 520   aarch64_sys_sched_get_priority_max = 125,
 521   aarch64_sys_sched_get_priority_min = 126,
 522   aarch64_sys_sched_rr_get_interval = 127,
 523   aarch64_sys_kill = 129,
 524   aarch64_sys_tkill = 130,
 525   aarch64_sys_tgkill = 131,
 526   aarch64_sys_sigaltstack = 132,
 527   aarch64_sys_rt_sigsuspend = 133,
 528   aarch64_sys_rt_sigaction = 134,
 529   aarch64_sys_rt_sigprocmask = 135,
 530   aarch64_sys_rt_sigpending = 136,
 531   aarch64_sys_rt_sigtimedwait = 137,
 532   aarch64_sys_rt_sigqueueinfo = 138,
 533   aarch64_sys_rt_sigreturn = 139,
 534   aarch64_sys_setpriority = 140,
 535   aarch64_sys_getpriority = 141,
 536   aarch64_sys_reboot = 142,
 537   aarch64_sys_setregid = 143,
 538   aarch64_sys_setgid = 144,
 539   aarch64_sys_setreuid = 145,
 540   aarch64_sys_setuid = 146,
 541   aarch64_sys_setresuid = 147,
 542   aarch64_sys_getresuid = 148,
 543   aarch64_sys_setresgid = 149,
 544   aarch64_sys_getresgid = 150,
 545   aarch64_sys_setfsuid = 151,
 546   aarch64_sys_setfsgid = 152,
 547   aarch64_sys_times = 153,
 548   aarch64_sys_setpgid = 154,
 549   aarch64_sys_getpgid = 155,
 550   aarch64_sys_getsid = 156,
 551   aarch64_sys_setsid = 157,
 552   aarch64_sys_getgroups = 158,
 553   aarch64_sys_setgroups = 159,
 554   aarch64_sys_uname = 160,
 555   aarch64_sys_sethostname = 161,
 556   aarch64_sys_setdomainname = 162,
 557   aarch64_sys_getrlimit = 163,
 558   aarch64_sys_setrlimit = 164,
 559   aarch64_sys_getrusage = 165,
 560   aarch64_sys_umask = 166,
 561   aarch64_sys_prctl = 167,
 562   aarch64_sys_getcpu = 168,
 563   aarch64_sys_gettimeofday = 169,
 564   aarch64_sys_settimeofday = 170,
 565   aarch64_sys_adjtimex = 171,
 566   aarch64_sys_getpid = 172,
 567   aarch64_sys_getppid = 173,
 568   aarch64_sys_getuid = 174,
 569   aarch64_sys_geteuid = 175,
 570   aarch64_sys_getgid = 176,
 571   aarch64_sys_getegid = 177,
 572   aarch64_sys_gettid = 178,
 573   aarch64_sys_sysinfo = 179,
 574   aarch64_sys_mq_open = 180,
 575   aarch64_sys_mq_unlink = 181,
 576   aarch64_sys_mq_timedsend = 182,
 577   aarch64_sys_mq_timedreceive = 183,
 578   aarch64_sys_mq_notify = 184,
 579   aarch64_sys_mq_getsetattr = 185,
 580   aarch64_sys_msgget = 186,
 581   aarch64_sys_msgctl = 187,
 582   aarch64_sys_msgrcv = 188,
 583   aarch64_sys_msgsnd = 189,
 584   aarch64_sys_semget = 190,
 585   aarch64_sys_semctl = 191,
 586   aarch64_sys_semtimedop = 192,
 587   aarch64_sys_semop = 193,
 588   aarch64_sys_shmget = 194,
 589   aarch64_sys_shmctl = 195,
 590   aarch64_sys_shmat = 196,
 591   aarch64_sys_shmdt = 197,
 592   aarch64_sys_socket = 198,
 593   aarch64_sys_socketpair = 199,
 594   aarch64_sys_bind = 200,
 595   aarch64_sys_listen = 201,
 596   aarch64_sys_accept = 202,
 597   aarch64_sys_connect = 203,
 598   aarch64_sys_getsockname = 204,
 599   aarch64_sys_getpeername = 205,
 600   aarch64_sys_sendto = 206,
 601   aarch64_sys_recvfrom = 207,
 602   aarch64_sys_setsockopt = 208,
 603   aarch64_sys_getsockopt = 209,
 604   aarch64_sys_shutdown = 210,
 605   aarch64_sys_sendmsg = 211,
 606   aarch64_sys_recvmsg = 212,
 607   aarch64_sys_readahead = 213,
 608   aarch64_sys_brk = 214,
 609   aarch64_sys_munmap = 215,
 610   aarch64_sys_mremap = 216,
 611   aarch64_sys_add_key = 217,
 612   aarch64_sys_request_key = 218,
 613   aarch64_sys_keyctl = 219,
 614   aarch64_sys_clone = 220,
 615   aarch64_sys_execve = 221,
 616   aarch64_sys_mmap = 222,
 617   aarch64_sys_fadvise64 = 223,
 618   aarch64_sys_swapon = 224,
 619   aarch64_sys_swapoff = 225,
 620   aarch64_sys_mprotect = 226,
 621   aarch64_sys_msync = 227,
 622   aarch64_sys_mlock = 228,
 623   aarch64_sys_munlock = 229,
 624   aarch64_sys_mlockall = 230,
 625   aarch64_sys_munlockall = 231,
 626   aarch64_sys_mincore = 232,
 627   aarch64_sys_madvise = 233,
 628   aarch64_sys_remap_file_pages = 234,
 629   aarch64_sys_mbind = 235,
 630   aarch64_sys_get_mempolicy = 236,
 631   aarch64_sys_set_mempolicy = 237,
 632   aarch64_sys_migrate_pages = 238,
 633   aarch64_sys_move_pages = 239,
 634   aarch64_sys_rt_tgsigqueueinfo = 240,
 635   aarch64_sys_perf_event_open = 241,
 636   aarch64_sys_accept4 = 242,
 637   aarch64_sys_recvmmsg = 243,
 638   aarch64_sys_wait4 = 260,
 639   aarch64_sys_prlimit64 = 261,
 640   aarch64_sys_fanotify_init = 262,
 641   aarch64_sys_fanotify_mark = 263,
 642   aarch64_sys_name_to_handle_at = 264,
 643   aarch64_sys_open_by_handle_at = 265,
 644   aarch64_sys_clock_adjtime = 266,
 645   aarch64_sys_syncfs = 267,
 646   aarch64_sys_setns = 268,
 647   aarch64_sys_sendmmsg = 269,
 648   aarch64_sys_process_vm_readv = 270,
 649   aarch64_sys_process_vm_writev = 271,
 650   aarch64_sys_kcmp = 272,
 651   aarch64_sys_finit_module = 273,
 652   aarch64_sys_sched_setattr = 274,
 653   aarch64_sys_sched_getattr = 275,
 654 };
 655
 656 /* aarch64_canonicalize_syscall maps syscall ids from the native AArch64
 657    linux set of syscall ids into a canonical set of syscall ids used by
 658    process record.  */
 659
 660 static enum gdb_syscall
 661 aarch64_canonicalize_syscall (enum aarch64_syscall syscall_number)
 662 {
 663 #define SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
 664   return gdb_sys_##SYSCALL
 665
 666 #define UNSUPPORTED_SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
 667   return gdb_sys_no_syscall
 668
 669   switch (syscall_number)
 670     {
 671       SYSCALL_MAP (io_setup);
 672       SYSCALL_MAP (io_destroy);
 673       SYSCALL_MAP (io_submit);
 674       SYSCALL_MAP (io_cancel);
 675       SYSCALL_MAP (io_getevents);
 676
 677       SYSCALL_MAP (setxattr);
 678       SYSCALL_MAP (lsetxattr);
 679       SYSCALL_MAP (fsetxattr);
 680       SYSCALL_MAP (getxattr);
 681       SYSCALL_MAP (lgetxattr);
 682       SYSCALL_MAP (fgetxattr);
 683       SYSCALL_MAP (listxattr);
 684       SYSCALL_MAP (llistxattr);
 685       SYSCALL_MAP (flistxattr);
 686       SYSCALL_MAP (removexattr);
 687       SYSCALL_MAP (lremovexattr);
 688       SYSCALL_MAP (fremovexattr);
 689       SYSCALL_MAP (getcwd);
 690       SYSCALL_MAP (lookup_dcookie);
 691       SYSCALL_MAP (eventfd2);
 692       SYSCALL_MAP (epoll_create1);
 693       SYSCALL_MAP (epoll_ctl);
 694       SYSCALL_MAP (epoll_pwait);
 695       SYSCALL_MAP (dup);
 696       SYSCALL_MAP (dup3);
 697       SYSCALL_MAP (fcntl);
 698       SYSCALL_MAP (inotify_init1);
 699       SYSCALL_MAP (inotify_add_watch);
 700       SYSCALL_MAP (inotify_rm_watch);
 701       SYSCALL_MAP (ioctl);
 702       SYSCALL_MAP (ioprio_set);
 703       SYSCALL_MAP (ioprio_get);
 704       SYSCALL_MAP (flock);
 705       SYSCALL_MAP (mknodat);
 706       SYSCALL_MAP (mkdirat);
 707       SYSCALL_MAP (unlinkat);
 708       SYSCALL_MAP (symlinkat);
 709       SYSCALL_MAP (linkat);
 710       SYSCALL_MAP (renameat);
 711       UNSUPPORTED_SYSCALL_MAP (umount2);
 712       SYSCALL_MAP (mount);
 713       SYSCALL_MAP (pivot_root);
 714       SYSCALL_MAP (nfsservctl);
 715       SYSCALL_MAP (statfs);
 716       SYSCALL_MAP (truncate);
 717       SYSCALL_MAP (ftruncate);
 718       SYSCALL_MAP (fallocate);
 719       SYSCALL_MAP (faccessat);
 720       SYSCALL_MAP (fchdir);
 721       SYSCALL_MAP (chroot);
 722       SYSCALL_MAP (fchmod);
 723       SYSCALL_MAP (fchmodat);
 724       SYSCALL_MAP (fchownat);
 725       SYSCALL_MAP (fchown);
 726       SYSCALL_MAP (openat);
 727       SYSCALL_MAP (close);
 728       SYSCALL_MAP (vhangup);
 729       SYSCALL_MAP (pipe2);
 730       SYSCALL_MAP (quotactl);
 731       SYSCALL_MAP (getdents64);
 732       SYSCALL_MAP (lseek);
 733       SYSCALL_MAP (read);
 734       SYSCALL_MAP (write);
 735       SYSCALL_MAP (readv);
 736       SYSCALL_MAP (writev);
 737       SYSCALL_MAP (pread64);
 738       SYSCALL_MAP (pwrite64);
 739       UNSUPPORTED_SYSCALL_MAP (preadv);
 740       UNSUPPORTED_SYSCALL_MAP (pwritev);
 741       SYSCALL_MAP (sendfile);
 742       SYSCALL_MAP (pselect6);
 743       SYSCALL_MAP (ppoll);
 744       UNSUPPORTED_SYSCALL_MAP (signalfd4);
 745       SYSCALL_MAP (vmsplice);
 746       SYSCALL_MAP (splice);
 747       SYSCALL_MAP (tee);
 748       SYSCALL_MAP (readlinkat);
 749       SYSCALL_MAP (newfstatat);
 750
 751       SYSCALL_MAP (fstat);
 752       SYSCALL_MAP (sync);
 753       SYSCALL_MAP (fsync);
 754       SYSCALL_MAP (fdatasync);
 755       SYSCALL_MAP (sync_file_range);
 756       UNSUPPORTED_SYSCALL_MAP (timerfd_create);
 757       UNSUPPORTED_SYSCALL_MAP (timerfd_settime);
 758       UNSUPPORTED_SYSCALL_MAP (timerfd_gettime);
 759       UNSUPPORTED_SYSCALL_MAP (utimensat);
 760       SYSCALL_MAP (acct);
 761       SYSCALL_MAP (capget);
 762       SYSCALL_MAP (capset);
 763       SYSCALL_MAP (personality);
 764       SYSCALL_MAP (exit);
 765       SYSCALL_MAP (exit_group);
 766       SYSCALL_MAP (waitid);
 767       SYSCALL_MAP (set_tid_address);
 768       SYSCALL_MAP (unshare);
 769       SYSCALL_MAP (futex);
 770       SYSCALL_MAP (set_robust_list);
 771       SYSCALL_MAP (get_robust_list);
 772       SYSCALL_MAP (nanosleep);
 773
 774       SYSCALL_MAP (getitimer);
 775       SYSCALL_MAP (setitimer);
 776       SYSCALL_MAP (kexec_load);
 777       SYSCALL_MAP (init_module);
 778       SYSCALL_MAP (delete_module);
 779       SYSCALL_MAP (timer_create);
 780       SYSCALL_MAP (timer_settime);
 781       SYSCALL_MAP (timer_gettime);
 782       SYSCALL_MAP (timer_getoverrun);
 783       SYSCALL_MAP (timer_delete);
 784       SYSCALL_MAP (clock_settime);
 785       SYSCALL_MAP (clock_gettime);
 786       SYSCALL_MAP (clock_getres);
 787       SYSCALL_MAP (clock_nanosleep);
 788       SYSCALL_MAP (syslog);
 789       SYSCALL_MAP (ptrace);
 790       SYSCALL_MAP (sched_setparam);
 791       SYSCALL_MAP (sched_setscheduler);
 792       SYSCALL_MAP (sched_getscheduler);
 793       SYSCALL_MAP (sched_getparam);
 794       SYSCALL_MAP (sched_setaffinity);
 795       SYSCALL_MAP (sched_getaffinity);
 796       SYSCALL_MAP (sched_yield);
 797       SYSCALL_MAP (sched_get_priority_max);
 798       SYSCALL_MAP (sched_get_priority_min);
 799       SYSCALL_MAP (sched_rr_get_interval);
 800       SYSCALL_MAP (kill);
 801       SYSCALL_MAP (tkill);
 802       SYSCALL_MAP (tgkill);
 803       SYSCALL_MAP (sigaltstack);
 804       SYSCALL_MAP (rt_sigsuspend);
 805       SYSCALL_MAP (rt_sigaction);
 806       SYSCALL_MAP (rt_sigprocmask);
 807       SYSCALL_MAP (rt_sigpending);
 808       SYSCALL_MAP (rt_sigtimedwait);
 809       SYSCALL_MAP (rt_sigqueueinfo);
 810       SYSCALL_MAP (rt_sigreturn);
 811       SYSCALL_MAP (setpriority);
 812       SYSCALL_MAP (getpriority);
 813       SYSCALL_MAP (reboot);
 814       SYSCALL_MAP (setregid);
 815       SYSCALL_MAP (setgid);
 816       SYSCALL_MAP (setreuid);
 817       SYSCALL_MAP (setuid);
 818       SYSCALL_MAP (setresuid);
 819       SYSCALL_MAP (getresuid);
 820       SYSCALL_MAP (setresgid);
 821       SYSCALL_MAP (getresgid);
 822       SYSCALL_MAP (setfsuid);
 823       SYSCALL_MAP (setfsgid);
 824       SYSCALL_MAP (times);
 825       SYSCALL_MAP (setpgid);
 826       SYSCALL_MAP (getpgid);
 827       SYSCALL_MAP (getsid);
 828       SYSCALL_MAP (setsid);
 829       SYSCALL_MAP (getgroups);
 830       SYSCALL_MAP (setgroups);
 831       SYSCALL_MAP (uname);
 832       SYSCALL_MAP (sethostname);
 833       SYSCALL_MAP (setdomainname);
 834       SYSCALL_MAP (getrlimit);
 835       SYSCALL_MAP (setrlimit);
 836       SYSCALL_MAP (getrusage);
 837       SYSCALL_MAP (umask);
 838       SYSCALL_MAP (prctl);
 839       SYSCALL_MAP (getcpu);
 840       SYSCALL_MAP (gettimeofday);
 841       SYSCALL_MAP (settimeofday);
 842       SYSCALL_MAP (adjtimex);
 843       SYSCALL_MAP (getpid);
 844       SYSCALL_MAP (getppid);
 845       SYSCALL_MAP (getuid);
 846       SYSCALL_MAP (geteuid);
 847       SYSCALL_MAP (getgid);
 848       SYSCALL_MAP (getegid);
 849       SYSCALL_MAP (gettid);
 850       SYSCALL_MAP (sysinfo);
 851       SYSCALL_MAP (mq_open);
 852       SYSCALL_MAP (mq_unlink);
 853       SYSCALL_MAP (mq_timedsend);
 854       SYSCALL_MAP (mq_timedreceive);
 855       SYSCALL_MAP (mq_notify);
 856       SYSCALL_MAP (mq_getsetattr);
 857       SYSCALL_MAP (msgget);
 858       SYSCALL_MAP (msgctl);
 859       SYSCALL_MAP (msgrcv);
 860       SYSCALL_MAP (msgsnd);
 861       SYSCALL_MAP (semget);
 862       SYSCALL_MAP (semctl);
 863       SYSCALL_MAP (semtimedop);
 864       SYSCALL_MAP (semop);
 865       SYSCALL_MAP (shmget);
 866       SYSCALL_MAP (shmctl);
 867       SYSCALL_MAP (shmat);
 868       SYSCALL_MAP (shmdt);
 869       SYSCALL_MAP (socket);
 870       SYSCALL_MAP (socketpair);
 871       SYSCALL_MAP (bind);
 872       SYSCALL_MAP (listen);
 873       SYSCALL_MAP (accept);
 874       SYSCALL_MAP (connect);
 875       SYSCALL_MAP (getsockname);
 876       SYSCALL_MAP (getpeername);
 877       SYSCALL_MAP (sendto);
 878       SYSCALL_MAP (recvfrom);
 879       SYSCALL_MAP (setsockopt);
 880       SYSCALL_MAP (getsockopt);
 881       SYSCALL_MAP (shutdown);
 882       SYSCALL_MAP (sendmsg);
 883       SYSCALL_MAP (recvmsg);
 884       SYSCALL_MAP (readahead);
 885       SYSCALL_MAP (brk);
 886       SYSCALL_MAP (munmap);
 887       SYSCALL_MAP (mremap);
 888       SYSCALL_MAP (add_key);
 889       SYSCALL_MAP (request_key);
 890       SYSCALL_MAP (keyctl);
 891       SYSCALL_MAP (clone);
 892       SYSCALL_MAP (execve);
 893
 894     case aarch64_sys_mmap:
 895       return gdb_sys_mmap2;
 896
 897       SYSCALL_MAP (fadvise64);
 898       SYSCALL_MAP (swapon);
 899       SYSCALL_MAP (swapoff);
 900       SYSCALL_MAP (mprotect);
 901       SYSCALL_MAP (msync);
 902       SYSCALL_MAP (mlock);
 903       SYSCALL_MAP (munlock);
 904       SYSCALL_MAP (mlockall);
 905       SYSCALL_MAP (munlockall);
 906       SYSCALL_MAP (mincore);
 907       SYSCALL_MAP (madvise);
 908       SYSCALL_MAP (remap_file_pages);
 909       SYSCALL_MAP (mbind);
 910       SYSCALL_MAP (get_mempolicy);
 911       SYSCALL_MAP (set_mempolicy);
 912       SYSCALL_MAP (migrate_pages);
 913       SYSCALL_MAP (move_pages);
 914       UNSUPPORTED_SYSCALL_MAP (rt_tgsigqueueinfo);
 915       UNSUPPORTED_SYSCALL_MAP (perf_event_open);
 916       UNSUPPORTED_SYSCALL_MAP (accept4);
 917       UNSUPPORTED_SYSCALL_MAP (recvmmsg);
 918
 919       SYSCALL_MAP (wait4);
 920
 921       UNSUPPORTED_SYSCALL_MAP (prlimit64);
 922       UNSUPPORTED_SYSCALL_MAP (fanotify_init);
 923       UNSUPPORTED_SYSCALL_MAP (fanotify_mark);
 924       UNSUPPORTED_SYSCALL_MAP (name_to_handle_at);
 925       UNSUPPORTED_SYSCALL_MAP (open_by_handle_at);
 926       UNSUPPORTED_SYSCALL_MAP (clock_adjtime);
 927       UNSUPPORTED_SYSCALL_MAP (syncfs);
 928       UNSUPPORTED_SYSCALL_MAP (setns);
 929       UNSUPPORTED_SYSCALL_MAP (sendmmsg);
 930       UNSUPPORTED_SYSCALL_MAP (process_vm_readv);
 931       UNSUPPORTED_SYSCALL_MAP (process_vm_writev);
 932       UNSUPPORTED_SYSCALL_MAP (kcmp);
 933       UNSUPPORTED_SYSCALL_MAP (finit_module);
 934       UNSUPPORTED_SYSCALL_MAP (sched_setattr);
 935       UNSUPPORTED_SYSCALL_MAP (sched_getattr);
 936   default:
 937     return gdb_sys_no_syscall;
 938   }
 939 }
 940
 941 /* Record all registers but PC register for process-record.  */
 942
 943 static int
 944 aarch64_all_but_pc_registers_record (struct regcache *regcache)
 945 {
 946   int i;
 947
 948   for (i = AARCH64_X0_REGNUM; i < AARCH64_PC_REGNUM; i++)
 949     if (record_full_arch_list_add_reg (regcache, i))
 950       return -1;
 951
 952   if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
 953     return -1;
 954
 955   return 0;
 956 }
 957
 958 /* Handler for aarch64 system call instruction recording.  */
 959
 960 static int
 961 aarch64_linux_syscall_record (struct regcache *regcache,
 962                               unsigned long svc_number)
 963 {
 964   int ret = 0;
 965   enum gdb_syscall syscall_gdb;
 966
 967   syscall_gdb =
 968     aarch64_canonicalize_syscall ((enum aarch64_syscall) svc_number);
 969
 970   if (syscall_gdb < 0)
 971     {
 972       printf_unfiltered (_("Process record and replay target doesn't "
 973                            "support syscall number %s\n"),
 974                          plongest (svc_number));
 975       return -1;
 976     }
 977
 978   if (syscall_gdb == gdb_sys_sigreturn
 979       || syscall_gdb == gdb_sys_rt_sigreturn)
 980    {
 981      if (aarch64_all_but_pc_registers_record (regcache))
 982        return -1;
 983      return 0;
 984    }
 985
 986   ret = record_linux_system_call (syscall_gdb, regcache,
 987                                   &aarch64_linux_record_tdep);
 988   if (ret != 0)
 989     return ret;
 990
 991   /* Record the return value of the system call.  */
 992   if (record_full_arch_list_add_reg (regcache, AARCH64_X0_REGNUM))
 993     return -1;
 994   /* Record LR.  */
 995   if (record_full_arch_list_add_reg (regcache, AARCH64_LR_REGNUM))
 996     return -1;
 997   /* Record CPSR.  */
 998   if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
 999     return -1;
1000
1001   return 0;
1002 }
1003
1004 /* Implement the "gcc_target_options" gdbarch method.  */
1005
1006 static char *
1007 aarch64_linux_gcc_target_options (struct gdbarch *gdbarch)
1008 {
1009   /* GCC doesn't know "-m64".  */
1010   return NULL;
1011 }
1012
1013 static void
1014 aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
1015 {
1016   static const char *const stap_integer_prefixes[] = { "#", "", NULL };
1017   static const char *const stap_register_prefixes[] = { "", NULL };
1018   static const char *const stap_register_indirection_prefixes[] = { "[",
1019                                                                     NULL };
1020   static const char *const stap_register_indirection_suffixes[] = { "]",
1021                                                                     NULL };
1022   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1023
1024   tdep->lowest_pc = 0x8000;
1025
1026   linux_init_abi (info, gdbarch);
1027
1028   set_solib_svr4_fetch_link_map_offsets (gdbarch,
1029                                          svr4_lp64_fetch_link_map_offsets);
1030
1031   /* Enable TLS support.  */
1032   set_gdbarch_fetch_tls_load_module_address (gdbarch,
1033                                              svr4_fetch_objfile_link_map);
1034
1035   /* Shared library handling.  */
1036   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
1037   set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
1038
1039   tramp_frame_prepend_unwinder (gdbarch, &aarch64_linux_rt_sigframe);
1040
1041   /* Enable longjmp.  */
1042   tdep->jb_pc = 11;
1043
1044   set_gdbarch_iterate_over_regset_sections
1045     (gdbarch, aarch64_linux_iterate_over_regset_sections);
1046   set_gdbarch_core_read_description
1047     (gdbarch, aarch64_linux_core_read_description);
1048
1049   /* SystemTap related.  */
1050   set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
1051   set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
1052   set_gdbarch_stap_register_indirection_prefixes (gdbarch,
1053                                             stap_register_indirection_prefixes);
1054   set_gdbarch_stap_register_indirection_suffixes (gdbarch,
1055                                             stap_register_indirection_suffixes);
1056   set_gdbarch_stap_is_single_operand (gdbarch, aarch64_stap_is_single_operand);
1057   set_gdbarch_stap_parse_special_token (gdbarch,
1058                                         aarch64_stap_parse_special_token);
1059
1060   /* Reversible debugging, process record.  */
1061   set_gdbarch_process_record (gdbarch, aarch64_process_record);
1062   /* Syscall record.  */
1063   tdep->aarch64_syscall_record = aarch64_linux_syscall_record;
1064
1065   /* The top byte of a user space address known as the "tag",
1066      is ignored by the kernel and can be regarded as additional
1067      data associated with the address.  */
1068   set_gdbarch_significant_addr_bit (gdbarch, 56);
1069
1070   /* Initialize the aarch64_linux_record_tdep.  */
1071   /* These values are the size of the type that will be used in a system
1072      call.  They are obtained from Linux Kernel source.  */
1073   aarch64_linux_record_tdep.size_pointer
1074     = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
1075   aarch64_linux_record_tdep.size__old_kernel_stat = 32;
1076   aarch64_linux_record_tdep.size_tms = 32;
1077   aarch64_linux_record_tdep.size_loff_t = 8;
1078   aarch64_linux_record_tdep.size_flock = 32;
1079   aarch64_linux_record_tdep.size_oldold_utsname = 45;
1080   aarch64_linux_record_tdep.size_ustat = 32;
1081   aarch64_linux_record_tdep.size_old_sigaction = 32;
1082   aarch64_linux_record_tdep.size_old_sigset_t = 8;
1083   aarch64_linux_record_tdep.size_rlimit = 16;
1084   aarch64_linux_record_tdep.size_rusage = 144;
1085   aarch64_linux_record_tdep.size_timeval = 16;
1086   aarch64_linux_record_tdep.size_timezone = 8;
1087   aarch64_linux_record_tdep.size_old_gid_t = 2;
1088   aarch64_linux_record_tdep.size_old_uid_t = 2;
1089   aarch64_linux_record_tdep.size_fd_set = 128;
1090   aarch64_linux_record_tdep.size_old_dirent = 280;
1091   aarch64_linux_record_tdep.size_statfs = 120;
1092   aarch64_linux_record_tdep.size_statfs64 = 120;
1093   aarch64_linux_record_tdep.size_sockaddr = 16;
1094   aarch64_linux_record_tdep.size_int
1095     = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
1096   aarch64_linux_record_tdep.size_long
1097     = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
1098   aarch64_linux_record_tdep.size_ulong
1099     = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
1100   aarch64_linux_record_tdep.size_msghdr = 56;
1101   aarch64_linux_record_tdep.size_itimerval = 32;
1102   aarch64_linux_record_tdep.size_stat = 144;
1103   aarch64_linux_record_tdep.size_old_utsname = 325;
1104   aarch64_linux_record_tdep.size_sysinfo = 112;
1105   aarch64_linux_record_tdep.size_msqid_ds = 120;
1106   aarch64_linux_record_tdep.size_shmid_ds = 112;
1107   aarch64_linux_record_tdep.size_new_utsname = 390;
1108   aarch64_linux_record_tdep.size_timex = 208;
1109   aarch64_linux_record_tdep.size_mem_dqinfo = 24;
1110   aarch64_linux_record_tdep.size_if_dqblk = 72;
1111   aarch64_linux_record_tdep.size_fs_quota_stat = 80;
1112   aarch64_linux_record_tdep.size_timespec = 16;
1113   aarch64_linux_record_tdep.size_pollfd = 8;
1114   aarch64_linux_record_tdep.size_NFS_FHSIZE = 32;
1115   aarch64_linux_record_tdep.size_knfsd_fh = 132;
1116   aarch64_linux_record_tdep.size_TASK_COMM_LEN = 16;
1117   aarch64_linux_record_tdep.size_sigaction = 32;
1118   aarch64_linux_record_tdep.size_sigset_t = 8;
1119   aarch64_linux_record_tdep.size_siginfo_t = 128;
1120   aarch64_linux_record_tdep.size_cap_user_data_t = 8;
1121   aarch64_linux_record_tdep.size_stack_t = 24;
1122   aarch64_linux_record_tdep.size_off_t = 8;
1123   aarch64_linux_record_tdep.size_stat64 = 144;
1124   aarch64_linux_record_tdep.size_gid_t = 4;
1125   aarch64_linux_record_tdep.size_uid_t = 4;
1126   aarch64_linux_record_tdep.size_PAGE_SIZE = 4096;
1127   aarch64_linux_record_tdep.size_flock64 = 32;
1128   aarch64_linux_record_tdep.size_user_desc = 16;
1129   aarch64_linux_record_tdep.size_io_event = 32;
1130   aarch64_linux_record_tdep.size_iocb = 64;
1131   aarch64_linux_record_tdep.size_epoll_event = 12;
1132   aarch64_linux_record_tdep.size_itimerspec = 32;
1133   aarch64_linux_record_tdep.size_mq_attr = 64;
1134   aarch64_linux_record_tdep.size_termios = 36;
1135   aarch64_linux_record_tdep.size_termios2 = 44;
1136   aarch64_linux_record_tdep.size_pid_t = 4;
1137   aarch64_linux_record_tdep.size_winsize = 8;
1138   aarch64_linux_record_tdep.size_serial_struct = 72;
1139   aarch64_linux_record_tdep.size_serial_icounter_struct = 80;
1140   aarch64_linux_record_tdep.size_hayes_esp_config = 12;
1141   aarch64_linux_record_tdep.size_size_t = 8;
1142   aarch64_linux_record_tdep.size_iovec = 16;
1143   aarch64_linux_record_tdep.size_time_t = 8;
1144
1145   /* These values are the second argument of system call "sys_ioctl".
1146      They are obtained from Linux Kernel source.  */
1147   aarch64_linux_record_tdep.ioctl_TCGETS = 0x5401;
1148   aarch64_linux_record_tdep.ioctl_TCSETS = 0x5402;
1149   aarch64_linux_record_tdep.ioctl_TCSETSW = 0x5403;
1150   aarch64_linux_record_tdep.ioctl_TCSETSF = 0x5404;
1151   aarch64_linux_record_tdep.ioctl_TCGETA = 0x5405;
1152   aarch64_linux_record_tdep.ioctl_TCSETA = 0x5406;
1153   aarch64_linux_record_tdep.ioctl_TCSETAW = 0x5407;
1154   aarch64_linux_record_tdep.ioctl_TCSETAF = 0x5408;
1155   aarch64_linux_record_tdep.ioctl_TCSBRK = 0x5409;
1156   aarch64_linux_record_tdep.ioctl_TCXONC = 0x540a;
1157   aarch64_linux_record_tdep.ioctl_TCFLSH = 0x540b;
1158   aarch64_linux_record_tdep.ioctl_TIOCEXCL = 0x540c;
1159   aarch64_linux_record_tdep.ioctl_TIOCNXCL = 0x540d;
1160   aarch64_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e;
1161   aarch64_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f;
1162   aarch64_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
1163   aarch64_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
1164   aarch64_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
1165   aarch64_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
1166   aarch64_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
1167   aarch64_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
1168   aarch64_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
1169   aarch64_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
1170   aarch64_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
1171   aarch64_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
1172   aarch64_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a;
1173   aarch64_linux_record_tdep.ioctl_FIONREAD = 0x541b;
1174   aarch64_linux_record_tdep.ioctl_TIOCINQ = 0x541b;
1175   aarch64_linux_record_tdep.ioctl_TIOCLINUX = 0x541c;
1176   aarch64_linux_record_tdep.ioctl_TIOCCONS = 0x541d;
1177   aarch64_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e;
1178   aarch64_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f;
1179   aarch64_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
1180   aarch64_linux_record_tdep.ioctl_FIONBIO = 0x5421;
1181   aarch64_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
1182   aarch64_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
1183   aarch64_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
1184   aarch64_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
1185   aarch64_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
1186   aarch64_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
1187   aarch64_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
1188   aarch64_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
1189   aarch64_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
1190   aarch64_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
1191   aarch64_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
1192   aarch64_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
1193   aarch64_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
1194   aarch64_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
1195   aarch64_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
1196   aarch64_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
1197   aarch64_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
1198   aarch64_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
1199   aarch64_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
1200   aarch64_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
1201   aarch64_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
1202   aarch64_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
1203   aarch64_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
1204   aarch64_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
1205   aarch64_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a;
1206   aarch64_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b;
1207   aarch64_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c;
1208   aarch64_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d;
1209   aarch64_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e;
1210   aarch64_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f;
1211   aarch64_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;
1212
1213   /* These values are the second argument of system call "sys_fcntl"
1214      and "sys_fcntl64".  They are obtained from Linux Kernel source.  */
1215   aarch64_linux_record_tdep.fcntl_F_GETLK = 5;
1216   aarch64_linux_record_tdep.fcntl_F_GETLK64 = 12;
1217   aarch64_linux_record_tdep.fcntl_F_SETLK64 = 13;
1218   aarch64_linux_record_tdep.fcntl_F_SETLKW64 = 14;
1219
1220   /* The AArch64 syscall calling convention: reg x0-x6 for arguments,
1221      reg x8 for syscall number and return value in reg x0.  */
1222   aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 0;
1223   aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 1;
1224   aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 2;
1225   aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;
1226   aarch64_linux_record_tdep.arg5 = AARCH64_X0_REGNUM + 4;
1227   aarch64_linux_record_tdep.arg6 = AARCH64_X0_REGNUM + 5;
1228   aarch64_linux_record_tdep.arg7 = AARCH64_X0_REGNUM + 6;
1229
1230   /* `catch syscall' */
1231   set_xml_syscall_file_name (gdbarch, "syscalls/aarch64-linux.xml");
1232   set_gdbarch_get_syscall_number (gdbarch, aarch64_linux_get_syscall_number);
1233
1234   /* Displaced stepping.  */
1235   set_gdbarch_max_insn_length (gdbarch, 4 * DISPLACED_MODIFIED_INSNS);
1236   set_gdbarch_displaced_step_copy_insn (gdbarch,
1237                                         aarch64_displaced_step_copy_insn);
1238   set_gdbarch_displaced_step_fixup (gdbarch, aarch64_displaced_step_fixup);
1239   set_gdbarch_displaced_step_location (gdbarch, linux_displaced_step_location);
1240   set_gdbarch_displaced_step_hw_singlestep (gdbarch,
1241                                             aarch64_displaced_step_hw_singlestep);
1242
1243   set_gdbarch_gcc_target_options (gdbarch, aarch64_linux_gcc_target_options);
1244 }
1245
1246 void
1247 _initialize_aarch64_linux_tdep (void)
1248 {
1249   gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_LINUX,
1250                           aarch64_linux_init_abi);
1251 }