[2/4] Implements aarch64 process record and reverse debugging support

Message ID 1432041752-4638-3-git-send-email-yao.qi@linaro.org
State New
Headers show

Commit Message

Yao Qi May 19, 2015, 1:22 p.m.
From: Omair Javaid <omair.javaid@linaro.org>

This patch adds the support of aarch64-linux process record and reverse
debugging.  The implementation is similar to ARM's counterpart.

2015-06-19  Omair Javaid  <omair.javaid@linaro.org>
	    Yao Qi  <yao.qi@linaro.org>

	* aarch64-linux-tdep.c: Include linux-record.h and
	record-full.h.
	(struct linux_record_tdep aarch64_linux_record_tdep): Declare.
	(aarch64_syscall): New enum.
	(aarch64_canonicalize_syscall): New function.
	(aarch64_all_but_pc_registers_record): New function.
	(aarch64_linux_syscall_record): New function.
	(aarch64_linux_init_abi): Install AArch64 process record
	handler.  Update to handle syscall recording.
	* aarch64-tdep.c: Include record.h and record-full.h.
	(submask, bit, bits, REG_ALLOC, MEM_ALLOC): New macros.
	(struct aarch64_mem_r): Define.
	(aarch64_record_result): New enum.
	(struct insn_decode_record): Define.
	(insn_decode_record): New typedef.
	(aarch64_record_data_proc_reg): New function.
	(aarch64_record_data_proc_imm): New function.
	(aarch64_record_branch_except_sys): New function.
	(aarch64_record_load_store): New function.
	(aarch64_record_data_proc_simd_fp): New function.
	(aarch64_record_asimd_load_store): New function.
	(aarch64_record_decode_insn_handler): New function.
	(deallocate_reg_mem): New function.
	(aarch64_process_record): New function.
	* aarch64-tdep.h (struct gdbarch_tdep) <aarch64_syscall_record>:
	New field.
	(aarch64_process_record): New extern declaration.
	* configure.tgt: Add linux-record.o to gdb_target_obs.
	* linux-record.h (struct linux_record_tdep): Add two more syscall
	argument fields.
---
 gdb/aarch64-linux-tdep.c | 739 ++++++++++++++++++++++++++++++++++++
 gdb/aarch64-tdep.c       | 967 +++++++++++++++++++++++++++++++++++++++++++++++
 gdb/aarch64-tdep.h       |   6 +
 gdb/configure.tgt        |   2 +-
 gdb/linux-record.h       |   1 +
 5 files changed, 1714 insertions(+), 1 deletion(-)

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diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 0ee5ecb..2f93846 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -42,6 +42,9 @@ 
 #include "xml-syscall.h"
 #include <ctype.h>
 
+#include "record-full.h"
+#include "linux-record.h"
+
 /* Signal frame handling.
 
       +------------+  ^
@@ -364,6 +367,576 @@  aarch64_linux_get_syscall_number (struct gdbarch *gdbarch,
   return ret;
 }
 
+/* AArch64 process record-replay constructs: syscall, signal etc.  */
+
+struct linux_record_tdep aarch64_linux_record_tdep;
+
+/* Enum that defines the AArch64 linux specific syscall identifiers used for
+   process record/replay.  */
+
+enum aarch64_syscall {
+  aarch64_sys_io_setup = 0,
+  aarch64_sys_io_destroy = 1,
+  aarch64_sys_io_submit = 2,
+  aarch64_sys_io_cancel = 3,
+  aarch64_sys_io_getevents = 4,
+  aarch64_sys_setxattr = 5,
+  aarch64_sys_lsetxattr = 6,
+  aarch64_sys_fsetxattr = 7,
+  aarch64_sys_getxattr = 8,
+  aarch64_sys_lgetxattr = 9,
+  aarch64_sys_fgetxattr = 10,
+  aarch64_sys_listxattr = 11,
+  aarch64_sys_llistxattr = 12,
+  aarch64_sys_flistxattr = 13,
+  aarch64_sys_removexattr = 14,
+  aarch64_sys_lremovexattr = 15,
+  aarch64_sys_fremovexattr = 16,
+  aarch64_sys_getcwd = 17,
+  aarch64_sys_lookup_dcookie = 18,
+  aarch64_sys_eventfd2 = 19,
+  aarch64_sys_epoll_create1 = 20,
+  aarch64_sys_epoll_ctl = 21,
+  aarch64_sys_epoll_pwait = 22,
+  aarch64_sys_dup = 23,
+  aarch64_sys_dup3 = 24,
+  aarch64_sys_fcntl = 25,
+  aarch64_sys_inotify_init1 = 26,
+  aarch64_sys_inotify_add_watch = 27,
+  aarch64_sys_inotify_rm_watch = 28,
+  aarch64_sys_ioctl = 29,
+  aarch64_sys_ioprio_set = 30,
+  aarch64_sys_ioprio_get = 31,
+  aarch64_sys_flock = 32,
+  aarch64_sys_mknod = 33,
+  aarch64_sys_mkdir = 34,
+  aarch64_sys_unlink = 35,
+  aarch64_sys_symlink = 36,
+  aarch64_sys_link = 37,
+  aarch64_sys_rename = 38,
+  aarch64_sys_umount2 = 39,
+  aarch64_sys_mount = 40,
+  aarch64_sys_pivot_root = 41,
+  aarch64_sys_nfsservctl = 42,
+  aarch64_sys_statfs = 43,
+  aarch64_sys_fstatfs = 44,
+  aarch64_sys_truncate = 45,
+  aarch64_sys_ftruncate = 46,
+  aarch64_sys_fallocate = 47,
+  aarch64_sys_faccess = 48,
+  aarch64_sys_chdir = 49,
+  aarch64_sys_fchdir = 50,
+  aarch64_sys_chroot = 51,
+  aarch64_sys_fchmod = 52,
+  aarch64_sys_fchmodat = 53,
+  aarch64_sys_fchownat = 54,
+  aarch64_sys_fchown = 55,
+  aarch64_sys_open = 56,
+  aarch64_sys_close = 57,
+  aarch64_sys_vhangup = 58,
+  aarch64_sys_pipe2 = 59,
+  aarch64_sys_quotactl = 60,
+  aarch64_sys_getdents64 = 61,
+  aarch64_sys_lseek = 62,
+  aarch64_sys_read = 63,
+  aarch64_sys_write = 64,
+  aarch64_sys_readv = 65,
+  aarch64_sys_writev = 66,
+  aarch64_sys_pread64 = 67,
+  aarch64_sys_pwrite64 = 68,
+  aarch64_sys_preadv = 69,
+  aarch64_sys_pwritev = 70,
+  aarch64_sys_sendfile = 71,
+  aarch64_sys_pselect6 = 72,
+  aarch64_sys_ppoll = 73,
+  aarch64_sys_signalfd4 = 74,
+  aarch64_sys_vmsplice = 75,
+  aarch64_sys_splice = 76,
+  aarch64_sys_tee = 77,
+  aarch64_sys_readlink = 78,
+  aarch64_sys_fstatat = 79,
+  aarch64_sys_fstat = 80,
+  aarch64_sys_sync = 81,
+  aarch64_sys_fsync = 82,
+  aarch64_sys_fdatasync = 83,
+  aarch64_sys_sync_file_range2 = 84,
+  aarch64_sys_sync_file_range = 84,
+  aarch64_sys_timerfd_create = 85,
+  aarch64_sys_timerfd_settime = 86,
+  aarch64_sys_timerfd_gettime = 87,
+  aarch64_sys_utimensat = 88,
+  aarch64_sys_acct = 89,
+  aarch64_sys_capget = 90,
+  aarch64_sys_capset = 91,
+  aarch64_sys_personality = 92,
+  aarch64_sys_exit = 93,
+  aarch64_sys_exit_group = 94,
+  aarch64_sys_waitid = 95,
+  aarch64_sys_set_tid_address = 96,
+  aarch64_sys_unshare = 97,
+  aarch64_sys_futex = 98,
+  aarch64_sys_set_robust_list = 99,
+  aarch64_sys_get_robust_list = 100,
+  aarch64_sys_nanosleep = 101,
+  aarch64_sys_getitimer = 102,
+  aarch64_sys_setitimer = 103,
+  aarch64_sys_kexec_load = 104,
+  aarch64_sys_init_module = 105,
+  aarch64_sys_delete_module = 106,
+  aarch64_sys_timer_create = 107,
+  aarch64_sys_timer_gettime = 108,
+  aarch64_sys_timer_getoverrun = 109,
+  aarch64_sys_timer_settime = 110,
+  aarch64_sys_timer_delete = 111,
+  aarch64_sys_clock_settime = 112,
+  aarch64_sys_clock_gettime = 113,
+  aarch64_sys_clock_getres = 114,
+  aarch64_sys_clock_nanosleep = 115,
+  aarch64_sys_syslog = 116,
+  aarch64_sys_ptrace = 117,
+  aarch64_sys_sched_setparam = 118,
+  aarch64_sys_sched_setscheduler = 119,
+  aarch64_sys_sched_getscheduler = 120,
+  aarch64_sys_sched_getparam = 121,
+  aarch64_sys_sched_setaffinity = 122,
+  aarch64_sys_sched_getaffinity = 123,
+  aarch64_sys_sched_yield = 124,
+  aarch64_sys_sched_get_priority_max = 125,
+  aarch64_sys_sched_get_priority_min = 126,
+  aarch64_sys_sched_rr_get_interval = 127,
+  aarch64_sys_kill = 129,
+  aarch64_sys_tkill = 130,
+  aarch64_sys_tgkill = 131,
+  aarch64_sys_sigaltstack = 132,
+  aarch64_sys_rt_sigsuspend = 133,
+  aarch64_sys_rt_sigaction = 134,
+  aarch64_sys_rt_sigprocmask = 135,
+  aarch64_sys_rt_sigpending = 136,
+  aarch64_sys_rt_sigtimedwait = 137,
+  aarch64_sys_rt_sigqueueinfo = 138,
+  aarch64_sys_rt_sigreturn = 139,
+  aarch64_sys_setpriority = 140,
+  aarch64_sys_getpriority = 141,
+  aarch64_sys_reboot = 142,
+  aarch64_sys_setregid = 143,
+  aarch64_sys_setgid = 144,
+  aarch64_sys_setreuid = 145,
+  aarch64_sys_setuid = 146,
+  aarch64_sys_setresuid = 147,
+  aarch64_sys_getresuid = 148,
+  aarch64_sys_setresgid = 149,
+  aarch64_sys_getresgid = 150,
+  aarch64_sys_setfsuid = 151,
+  aarch64_sys_setfsgid = 152,
+  aarch64_sys_times = 153,
+  aarch64_sys_setpgid = 154,
+  aarch64_sys_getpgid = 155,
+  aarch64_sys_getsid = 156,
+  aarch64_sys_setsid = 157,
+  aarch64_sys_getgroups = 158,
+  aarch64_sys_setgroups = 159,
+  aarch64_sys_uname = 160,
+  aarch64_sys_sethostname = 161,
+  aarch64_sys_setdomainname = 162,
+  aarch64_sys_getrlimit = 163,
+  aarch64_sys_setrlimit = 164,
+  aarch64_sys_getrusage = 165,
+  aarch64_sys_umask = 166,
+  aarch64_sys_prctl = 167,
+  aarch64_sys_getcpu = 168,
+  aarch64_sys_gettimeofday = 169,
+  aarch64_sys_settimeofday = 170,
+  aarch64_sys_adjtimex = 171,
+  aarch64_sys_getpid = 172,
+  aarch64_sys_getppid = 173,
+  aarch64_sys_getuid = 174,
+  aarch64_sys_geteuid = 175,
+  aarch64_sys_getgid = 176,
+  aarch64_sys_getegid = 177,
+  aarch64_sys_gettid = 178,
+  aarch64_sys_sysinfo = 179,
+  aarch64_sys_mq_open = 180,
+  aarch64_sys_mq_unlink = 181,
+  aarch64_sys_mq_timedsend = 182,
+  aarch64_sys_mq_timedreceive = 183,
+  aarch64_sys_mq_notify = 184,
+  aarch64_sys_mq_getsetattr = 185,
+  aarch64_sys_msgget = 186,
+  aarch64_sys_msgctl = 187,
+  aarch64_sys_msgrcv = 188,
+  aarch64_sys_msgsnd = 189,
+  aarch64_sys_semget = 190,
+  aarch64_sys_semctl = 191,
+  aarch64_sys_semtimedop = 192,
+  aarch64_sys_semop = 193,
+  aarch64_sys_shmget = 194,
+  aarch64_sys_shmctl = 195,
+  aarch64_sys_shmat = 196,
+  aarch64_sys_shmdt = 197,
+  aarch64_sys_socket = 198,
+  aarch64_sys_socketpair = 199,
+  aarch64_sys_bind = 200,
+  aarch64_sys_listen = 201,
+  aarch64_sys_accept = 202,
+  aarch64_sys_connect = 203,
+  aarch64_sys_getsockname = 204,
+  aarch64_sys_getpeername = 205,
+  aarch64_sys_sendto = 206,
+  aarch64_sys_recvfrom = 207,
+  aarch64_sys_setsockopt = 208,
+  aarch64_sys_getsockopt = 209,
+  aarch64_sys_shutdown = 210,
+  aarch64_sys_sendmsg = 211,
+  aarch64_sys_recvmsg = 212,
+  aarch64_sys_readahead = 213,
+  aarch64_sys_brk = 214,
+  aarch64_sys_munmap = 215,
+  aarch64_sys_mremap = 216,
+  aarch64_sys_add_key = 217,
+  aarch64_sys_request_key = 218,
+  aarch64_sys_keyctl = 219,
+  aarch64_sys_clone = 220,
+  aarch64_sys_execve = 221,
+  aarch64_sys_mmap = 222,
+  aarch64_sys_fadvise64 = 223,
+  aarch64_sys_swapon = 224,
+  aarch64_sys_swapoff = 225,
+  aarch64_sys_mprotect = 226,
+  aarch64_sys_msync = 227,
+  aarch64_sys_mlock = 228,
+  aarch64_sys_munlock = 229,
+  aarch64_sys_mlockall = 230,
+  aarch64_sys_munlockall = 231,
+  aarch64_sys_mincore = 232,
+  aarch64_sys_madvise = 233,
+  aarch64_sys_remap_file_pages = 234,
+  aarch64_sys_mbind = 235,
+  aarch64_sys_get_mempolicy = 236,
+  aarch64_sys_set_mempolicy = 237,
+  aarch64_sys_migrate_pages = 238,
+  aarch64_sys_move_pages = 239,
+  aarch64_sys_rt_tgsigqueueinfo = 240,
+  aarch64_sys_perf_event_open = 241,
+  aarch64_sys_accept4 = 242,
+  aarch64_sys_recvmmsg = 243,
+  aarch64_sys_wait4 = 260,
+  aarch64_sys_prlimit64 = 261,
+  aarch64_sys_fanotify_init = 262,
+  aarch64_sys_fanotify_mark = 263,
+  aarch64_sys_name_to_handle_at = 264,
+  aarch64_sys_open_by_handle_at = 265,
+  aarch64_sys_clock_adjtime = 266,
+  aarch64_sys_syncfs = 267,
+  aarch64_sys_setns = 268,
+  aarch64_sys_sendmmsg = 269,
+  aarch64_sys_process_vm_readv = 270,
+  aarch64_sys_process_vm_writev = 271,
+  aarch64_sys_kcmp = 272,
+  aarch64_sys_finit_module = 273,
+  aarch64_sys_sched_setattr = 274,
+  aarch64_sys_sched_getattr = 275,
+};
+
+/* aarch64_canonicalize_syscall maps syscall ids from the native AArch64
+   linux set of syscall ids into a canonical set of syscall ids used by
+   process record.  */
+
+static enum gdb_syscall
+aarch64_canonicalize_syscall (enum aarch64_syscall syscall_number)
+{
+#define SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
+  return gdb_sys_##SYSCALL
+
+  switch (syscall_number)
+    {
+      SYSCALL_MAP (io_setup);
+      SYSCALL_MAP (io_destroy);
+      SYSCALL_MAP (io_submit);
+      SYSCALL_MAP (io_cancel);
+      SYSCALL_MAP (io_getevents);
+
+      SYSCALL_MAP (setxattr);
+      SYSCALL_MAP (lsetxattr);
+      SYSCALL_MAP (fsetxattr);
+      SYSCALL_MAP (getxattr);
+      SYSCALL_MAP (lgetxattr);
+      SYSCALL_MAP (fgetxattr);
+      SYSCALL_MAP (listxattr);
+      SYSCALL_MAP (llistxattr);
+      SYSCALL_MAP (flistxattr);
+      SYSCALL_MAP (removexattr);
+      SYSCALL_MAP (lremovexattr);
+      SYSCALL_MAP (fremovexattr);
+      SYSCALL_MAP (getcwd);
+      SYSCALL_MAP (lookup_dcookie);
+
+    case aarch64_sys_epoll_create1:
+      return gdb_sys_epoll_create;
+
+      SYSCALL_MAP (epoll_ctl);
+      SYSCALL_MAP (epoll_pwait);
+      SYSCALL_MAP (dup);
+      SYSCALL_MAP (fcntl);
+      SYSCALL_MAP (inotify_add_watch);
+      SYSCALL_MAP (inotify_rm_watch);
+      SYSCALL_MAP (ioctl);
+      SYSCALL_MAP (ioprio_set);
+      SYSCALL_MAP (ioprio_get);
+      SYSCALL_MAP (flock);
+      SYSCALL_MAP (mount);
+      SYSCALL_MAP (nfsservctl);
+      SYSCALL_MAP (statfs);
+      SYSCALL_MAP (truncate);
+      SYSCALL_MAP (ftruncate);
+      SYSCALL_MAP (fchdir);
+      SYSCALL_MAP (chroot);
+      SYSCALL_MAP (fchmod);
+      SYSCALL_MAP (fchmodat);
+      SYSCALL_MAP (fchownat);
+      SYSCALL_MAP (fchown);
+      SYSCALL_MAP (close);
+      SYSCALL_MAP (vhangup);
+      SYSCALL_MAP (quotactl);
+      SYSCALL_MAP (getdents64);
+      SYSCALL_MAP (lseek);
+      SYSCALL_MAP (read);
+      SYSCALL_MAP (write);
+      SYSCALL_MAP (readv);
+      SYSCALL_MAP (writev);
+      SYSCALL_MAP (pread64);
+      SYSCALL_MAP (pwrite64);
+      SYSCALL_MAP (sendfile);
+      SYSCALL_MAP (pselect6);
+      SYSCALL_MAP (ppoll);
+      SYSCALL_MAP (vmsplice);
+      SYSCALL_MAP (splice);
+      SYSCALL_MAP (tee);
+      SYSCALL_MAP (fstat);
+      SYSCALL_MAP (sync);
+      SYSCALL_MAP (fsync);
+      SYSCALL_MAP (fdatasync);
+      SYSCALL_MAP (sync_file_range);
+      SYSCALL_MAP (acct);
+      SYSCALL_MAP (capget);
+      SYSCALL_MAP (capset);
+      SYSCALL_MAP (personality);
+      SYSCALL_MAP (exit);
+      SYSCALL_MAP (exit_group);
+      SYSCALL_MAP (waitid);
+      SYSCALL_MAP (set_tid_address);
+      SYSCALL_MAP (unshare);
+      SYSCALL_MAP (futex);
+      SYSCALL_MAP (set_robust_list);
+      SYSCALL_MAP (get_robust_list);
+      SYSCALL_MAP (nanosleep);
+
+      SYSCALL_MAP (getitimer);
+      SYSCALL_MAP (setitimer);
+      SYSCALL_MAP (kexec_load);
+      SYSCALL_MAP (init_module);
+      SYSCALL_MAP (delete_module);
+      SYSCALL_MAP (timer_create);
+      SYSCALL_MAP (timer_settime);
+      SYSCALL_MAP (timer_gettime);
+      SYSCALL_MAP (timer_getoverrun);
+      SYSCALL_MAP (timer_delete);
+      SYSCALL_MAP (clock_settime);
+      SYSCALL_MAP (clock_gettime);
+      SYSCALL_MAP (clock_getres);
+      SYSCALL_MAP (clock_nanosleep);
+      SYSCALL_MAP (syslog);
+      SYSCALL_MAP (ptrace);
+      SYSCALL_MAP (sched_setparam);
+      SYSCALL_MAP (sched_setscheduler);
+      SYSCALL_MAP (sched_getscheduler);
+      SYSCALL_MAP (sched_getparam);
+      SYSCALL_MAP (sched_setaffinity);
+      SYSCALL_MAP (sched_getaffinity);
+      SYSCALL_MAP (sched_yield);
+      SYSCALL_MAP (sched_get_priority_max);
+      SYSCALL_MAP (sched_get_priority_min);
+      SYSCALL_MAP (sched_rr_get_interval);
+      SYSCALL_MAP (kill);
+      SYSCALL_MAP (tkill);
+      SYSCALL_MAP (tgkill);
+      SYSCALL_MAP (sigaltstack);
+      SYSCALL_MAP (rt_sigsuspend);
+      SYSCALL_MAP (rt_sigaction);
+      SYSCALL_MAP (rt_sigprocmask);
+      SYSCALL_MAP (rt_sigpending);
+      SYSCALL_MAP (rt_sigtimedwait);
+      SYSCALL_MAP (rt_sigqueueinfo);
+      SYSCALL_MAP (rt_sigreturn);
+      SYSCALL_MAP (setpriority);
+      SYSCALL_MAP (getpriority);
+      SYSCALL_MAP (reboot);
+      SYSCALL_MAP (setregid);
+      SYSCALL_MAP (setgid);
+      SYSCALL_MAP (setreuid);
+      SYSCALL_MAP (setuid);
+      SYSCALL_MAP (setresuid);
+      SYSCALL_MAP (getresuid);
+      SYSCALL_MAP (setresgid);
+      SYSCALL_MAP (getresgid);
+      SYSCALL_MAP (setfsuid);
+      SYSCALL_MAP (setfsgid);
+      SYSCALL_MAP (times);
+      SYSCALL_MAP (setpgid);
+      SYSCALL_MAP (getpgid);
+      SYSCALL_MAP (getsid);
+      SYSCALL_MAP (setsid);
+      SYSCALL_MAP (getgroups);
+      SYSCALL_MAP (setgroups);
+      SYSCALL_MAP (uname);
+      SYSCALL_MAP (sethostname);
+      SYSCALL_MAP (setdomainname);
+      SYSCALL_MAP (getrlimit);
+      SYSCALL_MAP (setrlimit);
+      SYSCALL_MAP (getrusage);
+      SYSCALL_MAP (umask);
+      SYSCALL_MAP (prctl);
+      SYSCALL_MAP (gettimeofday);
+      SYSCALL_MAP (settimeofday);
+      SYSCALL_MAP (adjtimex);
+      SYSCALL_MAP (getpid);
+      SYSCALL_MAP (getppid);
+      SYSCALL_MAP (getuid);
+      SYSCALL_MAP (geteuid);
+      SYSCALL_MAP (getgid);
+      SYSCALL_MAP (getegid);
+      SYSCALL_MAP (gettid);
+      SYSCALL_MAP (sysinfo);
+      SYSCALL_MAP (mq_open);
+      SYSCALL_MAP (mq_unlink);
+      SYSCALL_MAP (mq_timedsend);
+      SYSCALL_MAP (mq_timedreceive);
+      SYSCALL_MAP (mq_notify);
+      SYSCALL_MAP (mq_getsetattr);
+      SYSCALL_MAP (msgget);
+      SYSCALL_MAP (msgctl);
+      SYSCALL_MAP (msgrcv);
+      SYSCALL_MAP (msgsnd);
+      SYSCALL_MAP (semget);
+      SYSCALL_MAP (semctl);
+      SYSCALL_MAP (semtimedop);
+      SYSCALL_MAP (semop);
+      SYSCALL_MAP (shmget);
+      SYSCALL_MAP (shmctl);
+      SYSCALL_MAP (shmat);
+      SYSCALL_MAP (shmdt);
+      SYSCALL_MAP (socket);
+      SYSCALL_MAP (socketpair);
+      SYSCALL_MAP (bind);
+      SYSCALL_MAP (listen);
+      SYSCALL_MAP (accept);
+      SYSCALL_MAP (connect);
+      SYSCALL_MAP (getsockname);
+      SYSCALL_MAP (getpeername);
+      SYSCALL_MAP (sendto);
+      SYSCALL_MAP (recvfrom);
+      SYSCALL_MAP (setsockopt);
+      SYSCALL_MAP (getsockopt);
+      SYSCALL_MAP (shutdown);
+      SYSCALL_MAP (sendmsg);
+      SYSCALL_MAP (recvmsg);
+      SYSCALL_MAP (readahead);
+      SYSCALL_MAP (brk);
+      SYSCALL_MAP (munmap);
+      SYSCALL_MAP (mremap);
+      SYSCALL_MAP (add_key);
+      SYSCALL_MAP (request_key);
+      SYSCALL_MAP (keyctl);
+      SYSCALL_MAP (clone);
+      SYSCALL_MAP (execve);
+
+    case aarch64_sys_mmap:
+      return gdb_sys_mmap2;
+
+      SYSCALL_MAP (fadvise64);
+      SYSCALL_MAP (swapon);
+      SYSCALL_MAP (swapoff);
+      SYSCALL_MAP (mprotect);
+      SYSCALL_MAP (msync);
+      SYSCALL_MAP (mlock);
+      SYSCALL_MAP (munlock);
+      SYSCALL_MAP (mlockall);
+      SYSCALL_MAP (munlockall);
+      SYSCALL_MAP (mincore);
+      SYSCALL_MAP (madvise);
+      SYSCALL_MAP (remap_file_pages);
+      SYSCALL_MAP (mbind);
+      SYSCALL_MAP (get_mempolicy);
+      SYSCALL_MAP (set_mempolicy);
+      SYSCALL_MAP (migrate_pages);
+      SYSCALL_MAP (move_pages);
+
+  default:
+    return -1;
+  }
+}
+
+/* Record all registers but PC register for process-record.  */
+
+static int
+aarch64_all_but_pc_registers_record (struct regcache *regcache)
+{
+  int i;
+
+  for (i = AARCH64_X0_REGNUM; i < AARCH64_PC_REGNUM; i++)
+    if (record_full_arch_list_add_reg (regcache, i))
+      return -1;
+
+  if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
+    return -1;
+
+  return 0;
+}
+
+/* Handler for aarch64 system call instruction recording.  */
+
+static int
+aarch64_linux_syscall_record (struct regcache *regcache,
+			      unsigned long svc_number)
+{
+  int ret = 0;
+  enum gdb_syscall syscall_gdb;
+
+  syscall_gdb = aarch64_canonicalize_syscall (svc_number);
+
+  if (syscall_gdb < 0)
+    {
+      printf_unfiltered (_("Process record and replay target doesn't "
+			   "support syscall number %s\n"),
+			 plongest (svc_number));
+      return -1;
+    }
+
+  if (syscall_gdb == gdb_sys_sigreturn
+      || syscall_gdb == gdb_sys_rt_sigreturn)
+   {
+     if (aarch64_all_but_pc_registers_record (regcache))
+       return -1;
+     return 0;
+   }
+
+  ret = record_linux_system_call (syscall_gdb, regcache,
+				  &aarch64_linux_record_tdep);
+  if (ret != 0)
+    return ret;
+
+  /* Record the return value of the system call.  */
+  if (record_full_arch_list_add_reg (regcache, AARCH64_X0_REGNUM))
+    return -1;
+  /* Record LR.  */
+  if (record_full_arch_list_add_reg (regcache, AARCH64_LR_REGNUM))
+    return -1;
+  /* Record CPSR.  */
+  if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
+    return -1;
+
+  return 0;
+}
+
 static void
 aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 {
@@ -409,6 +982,172 @@  aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   set_gdbarch_stap_parse_special_token (gdbarch,
 					aarch64_stap_parse_special_token);
 
+  /* Reversible debugging, process record.  */
+  set_gdbarch_process_record (gdbarch, aarch64_process_record);
+  /* Syscall record.  */
+  tdep->aarch64_syscall_record = aarch64_linux_syscall_record;
+
+  /* Initialize the aarch64_linux_record_tdep.  */
+  /* These values are the size of the type that will be used in a system
+     call.  They are obtained from Linux Kernel source.  */
+  aarch64_linux_record_tdep.size_pointer
+    = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
+  aarch64_linux_record_tdep.size__old_kernel_stat = 32;
+  aarch64_linux_record_tdep.size_tms = 32;
+  aarch64_linux_record_tdep.size_loff_t = 8;
+  aarch64_linux_record_tdep.size_flock = 32;
+  aarch64_linux_record_tdep.size_oldold_utsname = 45;
+  aarch64_linux_record_tdep.size_ustat = 32;
+  aarch64_linux_record_tdep.size_old_sigaction = 152;
+  aarch64_linux_record_tdep.size_old_sigset_t = 128;
+  aarch64_linux_record_tdep.size_rlimit = 16;
+  aarch64_linux_record_tdep.size_rusage = 144;
+  aarch64_linux_record_tdep.size_timeval = 16;
+  aarch64_linux_record_tdep.size_timezone = 8;
+  aarch64_linux_record_tdep.size_old_gid_t = 2;
+  aarch64_linux_record_tdep.size_old_uid_t = 2;
+  aarch64_linux_record_tdep.size_fd_set = 128;
+  aarch64_linux_record_tdep.size_dirent = 280;
+  aarch64_linux_record_tdep.size_dirent64 = 280;
+  aarch64_linux_record_tdep.size_statfs = 120;
+  aarch64_linux_record_tdep.size_statfs64 = 120;
+  aarch64_linux_record_tdep.size_sockaddr = 16;
+  aarch64_linux_record_tdep.size_int
+    = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
+  aarch64_linux_record_tdep.size_long
+    = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+  aarch64_linux_record_tdep.size_ulong
+    = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
+  aarch64_linux_record_tdep.size_msghdr = 56;
+  aarch64_linux_record_tdep.size_itimerval = 32;
+  aarch64_linux_record_tdep.size_stat = 144;
+  aarch64_linux_record_tdep.size_old_utsname = 325;
+  aarch64_linux_record_tdep.size_sysinfo = 112;
+  aarch64_linux_record_tdep.size_msqid_ds = 120;
+  aarch64_linux_record_tdep.size_shmid_ds = 112;
+  aarch64_linux_record_tdep.size_new_utsname = 390;
+  aarch64_linux_record_tdep.size_timex = 208;
+  aarch64_linux_record_tdep.size_mem_dqinfo = 24;
+  aarch64_linux_record_tdep.size_if_dqblk = 72;
+  aarch64_linux_record_tdep.size_fs_quota_stat = 80;
+  aarch64_linux_record_tdep.size_timespec = 16;
+  aarch64_linux_record_tdep.size_pollfd = 8;
+  aarch64_linux_record_tdep.size_NFS_FHSIZE = 32;
+  aarch64_linux_record_tdep.size_knfsd_fh = 132;
+  aarch64_linux_record_tdep.size_TASK_COMM_LEN = 16;
+  aarch64_linux_record_tdep.size_sigaction = 152;
+  aarch64_linux_record_tdep.size_sigset_t = 128;
+  aarch64_linux_record_tdep.size_siginfo_t = 128;
+  aarch64_linux_record_tdep.size_cap_user_data_t = 8;
+  aarch64_linux_record_tdep.size_stack_t = 24;
+  aarch64_linux_record_tdep.size_off_t = 8;
+  aarch64_linux_record_tdep.size_stat64 = 144;
+  aarch64_linux_record_tdep.size_gid_t = 4;
+  aarch64_linux_record_tdep.size_uid_t = 4;
+  aarch64_linux_record_tdep.size_PAGE_SIZE = 4096;
+  aarch64_linux_record_tdep.size_flock64 = 32;
+  aarch64_linux_record_tdep.size_user_desc = 16;
+  aarch64_linux_record_tdep.size_io_event = 32;
+  aarch64_linux_record_tdep.size_iocb = 64;
+  aarch64_linux_record_tdep.size_epoll_event = 12;
+  aarch64_linux_record_tdep.size_itimerspec = 32;
+  aarch64_linux_record_tdep.size_mq_attr = 64;
+  aarch64_linux_record_tdep.size_siginfo = 128;
+  aarch64_linux_record_tdep.size_termios = 60;
+  aarch64_linux_record_tdep.size_termios2 = 44;
+  aarch64_linux_record_tdep.size_pid_t = 4;
+  aarch64_linux_record_tdep.size_winsize = 8;
+  aarch64_linux_record_tdep.size_serial_struct = 72;
+  aarch64_linux_record_tdep.size_serial_icounter_struct = 80;
+  aarch64_linux_record_tdep.size_hayes_esp_config = 12;
+  aarch64_linux_record_tdep.size_size_t = 8;
+  aarch64_linux_record_tdep.size_iovec = 16;
+
+  /* These values are the second argument of system call "sys_ioctl".
+     They are obtained from Linux Kernel source.  */
+  aarch64_linux_record_tdep.ioctl_TCGETS = 0x5401;
+  aarch64_linux_record_tdep.ioctl_TCSETS = 0x5402;
+  aarch64_linux_record_tdep.ioctl_TCSETSW = 0x5403;
+  aarch64_linux_record_tdep.ioctl_TCSETSF = 0x5404;
+  aarch64_linux_record_tdep.ioctl_TCGETA = 0x5405;
+  aarch64_linux_record_tdep.ioctl_TCSETA = 0x5406;
+  aarch64_linux_record_tdep.ioctl_TCSETAW = 0x5407;
+  aarch64_linux_record_tdep.ioctl_TCSETAF = 0x5408;
+  aarch64_linux_record_tdep.ioctl_TCSBRK = 0x5409;
+  aarch64_linux_record_tdep.ioctl_TCXONC = 0x540a;
+  aarch64_linux_record_tdep.ioctl_TCFLSH = 0x540b;
+  aarch64_linux_record_tdep.ioctl_TIOCEXCL = 0x540c;
+  aarch64_linux_record_tdep.ioctl_TIOCNXCL = 0x540d;
+  aarch64_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e;
+  aarch64_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f;
+  aarch64_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
+  aarch64_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
+  aarch64_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
+  aarch64_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
+  aarch64_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
+  aarch64_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
+  aarch64_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
+  aarch64_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
+  aarch64_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
+  aarch64_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
+  aarch64_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a;
+  aarch64_linux_record_tdep.ioctl_FIONREAD = 0x541b;
+  aarch64_linux_record_tdep.ioctl_TIOCINQ = 0x541b;
+  aarch64_linux_record_tdep.ioctl_TIOCLINUX = 0x541c;
+  aarch64_linux_record_tdep.ioctl_TIOCCONS = 0x541d;
+  aarch64_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e;
+  aarch64_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f;
+  aarch64_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
+  aarch64_linux_record_tdep.ioctl_FIONBIO = 0x5421;
+  aarch64_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
+  aarch64_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
+  aarch64_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
+  aarch64_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
+  aarch64_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
+  aarch64_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
+  aarch64_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
+  aarch64_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
+  aarch64_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
+  aarch64_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
+  aarch64_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
+  aarch64_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
+  aarch64_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
+  aarch64_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
+  aarch64_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
+  aarch64_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
+  aarch64_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
+  aarch64_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
+  aarch64_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
+  aarch64_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
+  aarch64_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
+  aarch64_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
+  aarch64_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
+  aarch64_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
+  aarch64_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a;
+  aarch64_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b;
+  aarch64_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c;
+  aarch64_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d;
+  aarch64_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e;
+  aarch64_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f;
+  aarch64_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;
+
+  /* These values are the second argument of system call "sys_fcntl"
+     and "sys_fcntl64".  They are obtained from Linux Kernel source.  */
+  aarch64_linux_record_tdep.fcntl_F_GETLK = 5;
+  aarch64_linux_record_tdep.fcntl_F_GETLK64 = 12;
+  aarch64_linux_record_tdep.fcntl_F_SETLK64 = 13;
+  aarch64_linux_record_tdep.fcntl_F_SETLKW64 = 14;
+
+  /* The AArch64 syscall calling convention: reg x0-x6 for arguments,
+     reg x8 for syscall number and return value in reg x0.  */
+  aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 0;
+  aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 1;
+  aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 2;
+  aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;
+  aarch64_linux_record_tdep.arg5 = AARCH64_X0_REGNUM + 4;
+  aarch64_linux_record_tdep.arg6 = AARCH64_X0_REGNUM + 5;
+  aarch64_linux_record_tdep.arg7 = AARCH64_X0_REGNUM + 6;
+
   /* `catch syscall' */
   set_xml_syscall_file_name (gdbarch, "syscalls/aarch64-linux.xml");
   set_gdbarch_get_syscall_number (gdbarch, aarch64_linux_get_syscall_number);
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index ddc9022..8597497 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -50,6 +50,9 @@ 
 
 #include "vec.h"
 
+#include "record.h"
+#include "record-full.h"
+
 #include "features/aarch64.c"
 
 /* Pseudo register base numbers.  */
@@ -2803,3 +2806,967 @@  When on, AArch64 specific debugging is enabled."),
 			    show_aarch64_debug,
 			    &setdebuglist, &showdebuglist);
 }
+
+/* AArch64 process record-replay related structures, defines etc.  */
+
+#define submask(x) ((1L << ((x) + 1)) - 1)
+#define bit(obj,st) (((obj) >> (st)) & 1)
+#define bits(obj,st,fn) (((obj) >> (st)) & submask ((fn) - (st)))
+
+#define REG_ALLOC(REGS, LENGTH, RECORD_BUF) \
+        do  \
+          { \
+            unsigned int reg_len = LENGTH; \
+            if (reg_len) \
+              { \
+                REGS = XNEWVEC (uint32_t, reg_len); \
+                memcpy(&REGS[0], &RECORD_BUF[0], sizeof(uint32_t)*LENGTH); \
+              } \
+          } \
+        while (0)
+
+#define MEM_ALLOC(MEMS, LENGTH, RECORD_BUF) \
+        do  \
+          { \
+            unsigned int mem_len = LENGTH; \
+            if (mem_len) \
+            { \
+              MEMS =  XNEWVEC (struct aarch64_mem_r, mem_len);  \
+              memcpy(&MEMS->len, &RECORD_BUF[0], \
+                     sizeof(struct aarch64_mem_r) * LENGTH); \
+            } \
+          } \
+          while (0)
+
+/* AArch64 record/replay structures and enumerations.  */
+
+struct aarch64_mem_r
+{
+  uint64_t len;    /* Record length.  */
+  uint64_t addr;   /* Memory address.  */
+};
+
+enum aarch64_record_result
+{
+  AARCH64_RECORD_SUCCESS,
+  AARCH64_RECORD_FAILURE,
+  AARCH64_RECORD_UNSUPPORTED,
+  AARCH64_RECORD_UNKNOWN
+};
+
+typedef struct insn_decode_record_t
+{
+  struct gdbarch *gdbarch;
+  struct regcache *regcache;
+  CORE_ADDR this_addr;                 /* Address of insn to be recorded.  */
+  uint32_t aarch64_insn;               /* Insn to be recorded.  */
+  uint32_t mem_rec_count;              /* Count of memory records.  */
+  uint32_t reg_rec_count;              /* Count of register records.  */
+  uint32_t *aarch64_regs;              /* Registers to be recorded.  */
+  struct aarch64_mem_r *aarch64_mems;  /* Memory locations to be recorded.  */
+} insn_decode_record;
+
+/* Record handler for data processing - register instructions.  */
+
+static unsigned int
+aarch64_record_data_proc_reg (insn_decode_record *aarch64_insn_r)
+{
+  uint8_t reg_rd, insn_bits24_27, insn_bits21_23;
+  uint32_t record_buf[4];
+
+  reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+  insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
+  insn_bits21_23 = bits (aarch64_insn_r->aarch64_insn, 21, 23);
+
+  if (!bit (aarch64_insn_r->aarch64_insn, 28))
+    {
+      uint8_t setflags;
+
+      /* Logical (shifted register).  */
+      if (insn_bits24_27 == 0x0a)
+	setflags = (bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03);
+      /* Add/subtract.  */
+      else if (insn_bits24_27 == 0x0b)
+	setflags = bit (aarch64_insn_r->aarch64_insn, 29);
+      else
+	return AARCH64_RECORD_UNKNOWN;
+
+      record_buf[0] = reg_rd;
+      aarch64_insn_r->reg_rec_count = 1;
+      if (setflags)
+	record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
+    }
+  else
+    {
+      if (insn_bits24_27 == 0x0b)
+	{
+	  /* Data-processing (3 source).  */
+	  record_buf[0] = reg_rd;
+	  aarch64_insn_r->reg_rec_count = 1;
+	}
+      else if (insn_bits24_27 == 0x0a)
+	{
+	  if (insn_bits21_23 == 0x00)
+	    {
+	      /* Add/subtract (with carry).  */
+	      record_buf[0] = reg_rd;
+	      aarch64_insn_r->reg_rec_count = 1;
+	      if (bit (aarch64_insn_r->aarch64_insn, 29))
+		{
+		  record_buf[1] = AARCH64_CPSR_REGNUM;
+		  aarch64_insn_r->reg_rec_count = 2;
+		}
+	    }
+	  else if (insn_bits21_23 == 0x02)
+	    {
+	      /* Conditional compare (register) and conditional compare
+		 (immediate) instructions.  */
+	      record_buf[0] = AARCH64_CPSR_REGNUM;
+	      aarch64_insn_r->reg_rec_count = 1;
+	    }
+	  else if (insn_bits21_23 == 0x04 || insn_bits21_23 == 0x06)
+	    {
+	      /* CConditional select.  */
+	      /* Data-processing (2 source).  */
+	      /* Data-processing (1 source).  */
+	      record_buf[0] = reg_rd;
+	      aarch64_insn_r->reg_rec_count = 1;
+	    }
+	  else
+	    return AARCH64_RECORD_UNKNOWN;
+	}
+    }
+
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+	     record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Record handler for data processing - immediate instructions.  */
+
+static unsigned int
+aarch64_record_data_proc_imm (insn_decode_record *aarch64_insn_r)
+{
+  uint8_t reg_rd, insn_bit28, insn_bit23, insn_bits24_27, setflags;
+  uint32_t record_buf[4];
+
+  reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+  insn_bit28 = bit (aarch64_insn_r->aarch64_insn, 28);
+  insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23);
+  insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
+
+  if (insn_bits24_27 == 0x00                     /* PC rel addressing.  */
+     || insn_bits24_27 == 0x03                   /* Bitfield and Extract.  */
+     || (insn_bits24_27 == 0x02 && insn_bit23))  /* Move wide (immediate).  */
+    {
+      record_buf[0] = reg_rd;
+      aarch64_insn_r->reg_rec_count = 1;
+    }
+  else if (insn_bits24_27 == 0x01)
+    {
+      /* Add/Subtract (immediate).  */
+      setflags = bit (aarch64_insn_r->aarch64_insn, 29);
+      record_buf[0] = reg_rd;
+      aarch64_insn_r->reg_rec_count = 1;
+      if (setflags)
+	record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
+    }
+  else if (insn_bits24_27 == 0x02 && !insn_bit23)
+    {
+      /* Logical (immediate).  */
+      setflags = bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03;
+      record_buf[0] = reg_rd;
+      aarch64_insn_r->reg_rec_count = 1;
+      if (setflags)
+	record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
+    }
+  else
+    return AARCH64_RECORD_UNKNOWN;
+
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+	     record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Record handler for branch, exception generation and system instructions.  */
+
+static unsigned int
+aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r)
+{
+  struct gdbarch_tdep *tdep = gdbarch_tdep (aarch64_insn_r->gdbarch);
+  uint8_t insn_bits24_27, insn_bits28_31, insn_bits22_23;
+  uint32_t record_buf[4];
+
+  insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
+  insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31);
+  insn_bits22_23 = bits (aarch64_insn_r->aarch64_insn, 22, 23);
+
+  if (insn_bits28_31 == 0x0d)
+    {
+      /* Exception generation instructions. */
+      if (insn_bits24_27 == 0x04)
+	{
+	  if (!bits (aarch64_insn_r->aarch64_insn, 2, 4) &&
+	      !bits (aarch64_insn_r->aarch64_insn, 21, 23) &&
+	      bits (aarch64_insn_r->aarch64_insn, 0, 1) == 0x01)
+	    {
+	      ULONGEST svc_number;
+
+	      regcache_raw_read_unsigned (aarch64_insn_r->regcache, 8,
+					  &svc_number);
+	      return tdep->aarch64_syscall_record (aarch64_insn_r->regcache,
+						   svc_number);
+	    }
+	  else
+	    return AARCH64_RECORD_UNSUPPORTED;
+	}
+      /* System instructions. */
+      else if (insn_bits24_27 == 0x05 && insn_bits22_23 == 0x00)
+	{
+	  uint32_t reg_rt, reg_crn;
+
+	  reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+	  reg_crn = bits (aarch64_insn_r->aarch64_insn, 12, 15);
+
+	  /* Record rt in case of sysl and mrs instructions.  */
+	  if (bit (aarch64_insn_r->aarch64_insn, 21))
+	    {
+	      record_buf[0] = reg_rt;
+	      aarch64_insn_r->reg_rec_count = 1;
+	    }
+	  /* Record cpsr for hint and msr(immediate) instructions.  */
+	  else if (reg_crn == 0x02 || reg_crn == 0x04)
+	    {
+	      record_buf[0] = AARCH64_CPSR_REGNUM;
+	      aarch64_insn_r->reg_rec_count = 1;
+	    }
+	}
+      /* Unconditional branch (register).  */
+      else if((insn_bits24_27 & 0x0e) == 0x06)
+	{
+	  record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
+	  if (bits (aarch64_insn_r->aarch64_insn, 21, 22) == 0x01)
+	    record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM;
+	}
+      else
+	return AARCH64_RECORD_UNKNOWN;
+    }
+  /* Unconditional branch (immediate).  */
+  else if ((insn_bits28_31 & 0x07) == 0x01 && (insn_bits24_27 & 0x0c) == 0x04)
+    {
+      record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
+      if (bit (aarch64_insn_r->aarch64_insn, 31))
+	record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM;
+    }
+  else
+    /* Compare & branch (immediate), Test & branch (immediate) and
+       Conditional branch (immediate).  */
+    record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
+
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+	     record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Record handler for advanced SIMD load and store instructions.  */
+
+static unsigned int
+aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r)
+{
+  CORE_ADDR address;
+  uint64_t addr_offset = 0;
+  uint32_t record_buf[24];
+  uint64_t record_buf_mem[24];
+  uint32_t reg_rn, reg_rt;
+  uint32_t reg_index = 0, mem_index = 0;
+  uint8_t opcode_bits, size_bits;
+
+  reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+  reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9);
+  size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11);
+  opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15);
+  regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address);
+
+  if (record_debug)
+    {
+      fprintf_unfiltered (gdb_stdlog,
+			  "Process record: Advanced SIMD load/store\n");
+    }
+
+  /* Load/store single structure.  */
+  if (bit (aarch64_insn_r->aarch64_insn, 24))
+    {
+      uint8_t sindex, scale, selem, esize, replicate = 0;
+      scale = opcode_bits >> 2;
+      selem = ((opcode_bits & 0x02) |
+              bit (aarch64_insn_r->aarch64_insn, 21)) + 1;
+      switch (scale)
+        {
+        case 1:
+          if (size_bits & 0x01)
+            return AARCH64_RECORD_UNKNOWN;
+          break;
+        case 2:
+          if ((size_bits >> 1) & 0x01)
+            return AARCH64_RECORD_UNKNOWN;
+          if (size_bits & 0x01)
+            {
+              if (!((opcode_bits >> 1) & 0x01))
+                scale = 3;
+              else
+                return AARCH64_RECORD_UNKNOWN;
+            }
+          break;
+        case 3:
+          if (bit (aarch64_insn_r->aarch64_insn, 22) && !(opcode_bits & 0x01))
+            {
+              scale = size_bits;
+              replicate = 1;
+              break;
+            }
+          else
+            return AARCH64_RECORD_UNKNOWN;
+        default:
+          break;
+        }
+      esize = 8 << scale;
+      if (replicate)
+        for (sindex = 0; sindex < selem; sindex++)
+          {
+            record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
+            reg_rt = (reg_rt + 1) % 32;
+          }
+      else
+        {
+          for (sindex = 0; sindex < selem; sindex++)
+            if (bit (aarch64_insn_r->aarch64_insn, 22))
+              record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
+            else
+              {
+                record_buf_mem[mem_index++] = esize / 8;
+                record_buf_mem[mem_index++] = address + addr_offset;
+              }
+            addr_offset = addr_offset + (esize / 8);
+            reg_rt = (reg_rt + 1) % 32;
+        }
+    }
+  /* Load/store multiple structure.  */
+  else
+    {
+      uint8_t selem, esize, rpt, elements;
+      uint8_t eindex, rindex;
+
+      esize = 8 << size_bits;
+      if (bit (aarch64_insn_r->aarch64_insn, 30))
+        elements = 128 / esize;
+      else
+        elements = 64 / esize;
+
+      switch (opcode_bits)
+        {
+        /*LD/ST4 (4 Registers).  */
+        case 0:
+          rpt = 1;
+          selem = 4;
+          break;
+        /*LD/ST1 (4 Registers).  */
+        case 2:
+          rpt = 4;
+          selem = 1;
+          break;
+        /*LD/ST3 (3 Registers).  */
+        case 4:
+          rpt = 1;
+          selem = 3;
+          break;
+        /*LD/ST1 (3 Registers).  */
+        case 6:
+          rpt = 3;
+          selem = 1;
+          break;
+        /*LD/ST1 (1 Register).  */
+        case 7:
+          rpt = 1;
+          selem = 1;
+          break;
+        /*LD/ST2 (2 Registers).  */
+        case 8:
+          rpt = 1;
+          selem = 2;
+          break;
+        /*LD/ST1 (2 Registers).  */
+        case 10:
+          rpt = 2;
+          selem = 1;
+          break;
+        default:
+          return AARCH64_RECORD_UNSUPPORTED;
+          break;
+        }
+      for (rindex = 0; rindex < rpt; rindex++)
+        for (eindex = 0; eindex < elements; eindex++)
+          {
+            uint8_t reg_tt, sindex;
+            reg_tt = (reg_rt + rindex) % 32;
+            for (sindex = 0; sindex < selem; sindex++)
+              {
+                if (bit (aarch64_insn_r->aarch64_insn, 22))
+                  record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM;
+                else
+                  {
+                    record_buf_mem[mem_index++] = esize / 8;
+                    record_buf_mem[mem_index++] = address + addr_offset;
+                  }
+                addr_offset = addr_offset + (esize / 8);
+                reg_tt = (reg_tt + 1) % 32;
+              }
+          }
+    }
+
+  if (bit (aarch64_insn_r->aarch64_insn, 23))
+    record_buf[reg_index++] = reg_rn;
+
+  aarch64_insn_r->reg_rec_count = reg_index;
+  aarch64_insn_r->mem_rec_count = mem_index / 2;
+  MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count,
+             record_buf_mem);
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+             record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Record handler for load and store instructions.  */
+
+static unsigned int
+aarch64_record_load_store (insn_decode_record *aarch64_insn_r)
+{
+  uint8_t insn_bits24_27, insn_bits28_29, insn_bits10_11;
+  uint8_t insn_bit23, insn_bit21;
+  uint8_t opc, size_bits, ld_flag, vector_flag;
+  uint32_t reg_rn, reg_rt, reg_rt2;
+  uint64_t datasize, offset;
+  uint32_t record_buf[8];
+  uint64_t record_buf_mem[8];
+  CORE_ADDR address;
+
+  insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11);
+  insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
+  insn_bits28_29 = bits (aarch64_insn_r->aarch64_insn, 28, 29);
+  insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21);
+  insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23);
+  ld_flag = bit (aarch64_insn_r->aarch64_insn, 22);
+  vector_flag = bit (aarch64_insn_r->aarch64_insn, 26);
+  reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+  reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9);
+  reg_rt2 = bits (aarch64_insn_r->aarch64_insn, 10, 14);
+  size_bits = bits (aarch64_insn_r->aarch64_insn, 30, 31);
+
+  /* Load/store exclusive.  */
+  if (insn_bits24_27 == 0x08 && insn_bits28_29 == 0x00)
+    {
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load/store exclusive\n");
+	}
+
+      if (ld_flag)
+	{
+	  record_buf[0] = reg_rt;
+	  aarch64_insn_r->reg_rec_count = 1;
+	  if (insn_bit21)
+	    {
+	      record_buf[1] = reg_rt2;
+	      aarch64_insn_r->reg_rec_count = 2;
+	    }
+	}
+      else
+	{
+	  if (insn_bit21)
+	    datasize = (8 << size_bits) * 2;
+	  else
+	    datasize = (8 << size_bits);
+	  regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
+				      &address);
+	  record_buf_mem[0] = datasize / 8;
+	  record_buf_mem[1] = address;
+	  aarch64_insn_r->mem_rec_count = 1;
+	  if (!insn_bit23)
+	    {
+	      /* Save register rs.  */
+	      record_buf[0] = bits (aarch64_insn_r->aarch64_insn, 16, 20);
+	      aarch64_insn_r->reg_rec_count = 1;
+	    }
+	}
+    }
+  /* Load register (literal) instructions decoding.  */
+  else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x01)
+    {
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load register (literal)\n");
+	}
+      if (vector_flag)
+        record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
+      else
+        record_buf[0] = reg_rt;
+      aarch64_insn_r->reg_rec_count = 1;
+    }
+  /* All types of load/store pair instructions decoding.  */
+  else if ((insn_bits24_27 & 0x0a) == 0x08 && insn_bits28_29 == 0x02)
+    {
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load/store pair\n");
+	}
+
+      if (ld_flag)
+        {
+          if (vector_flag)
+            {
+              record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
+              record_buf[1] = reg_rt2 + AARCH64_V0_REGNUM;
+            }
+          else
+            {
+              record_buf[0] = reg_rt;
+              record_buf[1] = reg_rt2;
+            }
+          aarch64_insn_r->reg_rec_count = 2;
+        }
+      else
+        {
+          uint16_t imm7_off;
+          imm7_off = bits (aarch64_insn_r->aarch64_insn, 15, 21);
+          if (!vector_flag)
+            size_bits = size_bits >> 1;
+          datasize = 8 << (2 + size_bits);
+          offset = (imm7_off & 0x40) ? (~imm7_off & 0x007f) + 1 : imm7_off;
+          offset = offset << (2 + size_bits);
+          regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
+                                      &address);
+          if (!((insn_bits24_27 & 0x0b) == 0x08 && insn_bit23))
+            {
+              if (imm7_off & 0x40)
+                address = address - offset;
+              else
+                address = address + offset;
+            }
+
+          record_buf_mem[0] = datasize / 8;
+          record_buf_mem[1] = address;
+          record_buf_mem[2] = datasize / 8;
+          record_buf_mem[3] = address + (datasize / 8);
+          aarch64_insn_r->mem_rec_count = 2;
+        }
+      if (bit (aarch64_insn_r->aarch64_insn, 23))
+        record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn;
+    }
+  /* Load/store register (unsigned immediate) instructions.  */
+  else if ((insn_bits24_27 & 0x0b) == 0x09 && insn_bits28_29 == 0x03)
+    {
+      opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
+      if (!(opc >> 1))
+        if (opc & 0x01)
+          ld_flag = 0x01;
+        else
+          ld_flag = 0x0;
+      else
+        if (size_bits != 0x03)
+          ld_flag = 0x01;
+        else
+          return AARCH64_RECORD_UNKNOWN;
+
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load/store (unsigned immediate):"
+			      " size %x V %d opc %x\n", size_bits, vector_flag,
+			      opc);
+	}
+
+      if (!ld_flag)
+        {
+          offset = bits (aarch64_insn_r->aarch64_insn, 10, 21);
+          datasize = 8 << size_bits;
+          regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
+                                      &address);
+          offset = offset << size_bits;
+          address = address + offset;
+
+          record_buf_mem[0] = datasize >> 3;
+          record_buf_mem[1] = address;
+          aarch64_insn_r->mem_rec_count = 1;
+        }
+      else
+        {
+          if (vector_flag)
+            record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
+          else
+            record_buf[0] = reg_rt;
+          aarch64_insn_r->reg_rec_count = 1;
+        }
+    }
+  /* Load/store register (register offset) instructions.  */
+  else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 &&
+	   insn_bits10_11 == 0x02 && insn_bit21)
+    {
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load/store (register offset)\n");
+	}
+      opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
+      if (!(opc >> 1))
+        if (opc & 0x01)
+          ld_flag = 0x01;
+        else
+          ld_flag = 0x0;
+      else
+        if (size_bits != 0x03)
+          ld_flag = 0x01;
+        else
+          return AARCH64_RECORD_UNKNOWN;
+
+      if (!ld_flag)
+        {
+          uint64_t reg_rm_val;
+          regcache_raw_read_unsigned (aarch64_insn_r->regcache,
+                     bits (aarch64_insn_r->aarch64_insn, 16, 20), &reg_rm_val);
+          if (bit (aarch64_insn_r->aarch64_insn, 12))
+            offset = reg_rm_val << size_bits;
+          else
+            offset = reg_rm_val;
+          datasize = 8 << size_bits;
+          regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
+                                      &address);
+          address = address + offset;
+          record_buf_mem[0] = datasize >> 3;
+          record_buf_mem[1] = address;
+          aarch64_insn_r->mem_rec_count = 1;
+        }
+      else
+        {
+          if (vector_flag)
+            record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
+          else
+            record_buf[0] = reg_rt;
+          aarch64_insn_r->reg_rec_count = 1;
+        }
+    }
+  /* Load/store register (immediate and unprivileged) instructions.  */
+  else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 &&
+          !insn_bit21)
+    {
+      if (record_debug)
+	{
+	  fprintf_unfiltered (gdb_stdlog,
+			      "Process record: load/store (immediate and unprivileged)\n");
+	}
+      opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
+      if (!(opc >> 1))
+        if (opc & 0x01)
+          ld_flag = 0x01;
+        else
+          ld_flag = 0x0;
+      else
+        if (size_bits != 0x03)
+          ld_flag = 0x01;
+        else
+          return AARCH64_RECORD_UNKNOWN;
+
+      if (!ld_flag)
+        {
+          uint16_t imm9_off;
+          imm9_off = bits (aarch64_insn_r->aarch64_insn, 12, 20);
+          offset = (imm9_off & 0x0100) ? (((~imm9_off) & 0x01ff) + 1) : imm9_off;
+          datasize = 8 << size_bits;
+          regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
+                                      &address);
+          if (insn_bits10_11 != 0x01)
+            {
+              if (imm9_off & 0x0100)
+                address = address - offset;
+              else
+                address = address + offset;
+            }
+          record_buf_mem[0] = datasize >> 3;
+          record_buf_mem[1] = address;
+          aarch64_insn_r->mem_rec_count = 1;
+        }
+      else
+        {
+          if (vector_flag)
+            record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
+          else
+            record_buf[0] = reg_rt;
+          aarch64_insn_r->reg_rec_count = 1;
+        }
+      if (insn_bits10_11 == 0x01 || insn_bits10_11 == 0x03)
+        record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn;
+    }
+  /* Advanced SIMD load/store instructions.  */
+  else
+    return aarch64_record_asimd_load_store (aarch64_insn_r);
+
+  MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count,
+             record_buf_mem);
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+             record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Record handler for data processing SIMD and floating point instructions.  */
+
+static unsigned int
+aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r)
+{
+  uint8_t insn_bit21, opcode, rmode, reg_rd;
+  uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15;
+  uint8_t insn_bits11_14;
+  uint32_t record_buf[2];
+
+  insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
+  insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31);
+  insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11);
+  insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15);
+  insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14);
+  opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18);
+  rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20);
+  reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
+  insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21);
+
+  if (record_debug)
+    {
+      fprintf_unfiltered (gdb_stdlog,
+			  "Process record: data processing SIMD/FP: ");
+    }
+
+  if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e)
+    {
+      /* Floating point - fixed point conversion instructions.  */
+      if (!insn_bit21)
+	{
+	  if (record_debug)
+	    fprintf_unfiltered (gdb_stdlog, "FP - fixed point conversion");
+
+	  if ((opcode >> 1) == 0x0 && rmode == 0x03)
+	    record_buf[0] = reg_rd;
+	  else
+	    record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+	}
+      /* Floating point - conditional compare instructions.  */
+      else if (insn_bits10_11 == 0x01)
+	{
+	  if (record_debug)
+	    fprintf_unfiltered (gdb_stdlog, "FP - conditional compare");
+
+	  record_buf[0] = AARCH64_CPSR_REGNUM;
+	}
+      /* Floating point - data processing (2-source) and
+         conditional select instructions.  */
+      else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03)
+	{
+	  if (record_debug)
+	    fprintf_unfiltered (gdb_stdlog, "FP - DP (2-source)");
+
+	  record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+	}
+      else if (insn_bits10_11 == 0x00)
+	{
+	  /* Floating point - immediate instructions.  */
+	  if ((insn_bits12_15 & 0x01) == 0x01
+	      || (insn_bits12_15 & 0x07) == 0x04)
+	    {
+	      if (record_debug)
+		fprintf_unfiltered (gdb_stdlog, "FP - immediate");
+	      record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+	    }
+	  /* Floating point - compare instructions.  */
+	  else if ((insn_bits12_15 & 0x03) == 0x02)
+	    {
+	      if (record_debug)
+		fprintf_unfiltered (gdb_stdlog, "FP - immediate");
+	      record_buf[0] = AARCH64_CPSR_REGNUM;
+	    }
+	  /* Floating point - integer conversions instructions.  */
+	  if (insn_bits12_15 == 0x00)
+	    {
+	      /* Convert float to integer instruction.  */
+	      if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode))
+		{
+		  if (record_debug)
+		    fprintf_unfiltered (gdb_stdlog, "float to int conversion");
+
+		  record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
+		}
+	      /* Convert integer to float instruction.  */
+	      else if ((opcode >> 1) == 0x01 && !rmode)
+		{
+		  if (record_debug)
+		    fprintf_unfiltered (gdb_stdlog, "int to float conversion");
+
+		  record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+		}
+	      /* Move float to integer instruction.  */
+	      else if ((opcode >> 1) == 0x03)
+		{
+		  if (record_debug)
+		    fprintf_unfiltered (gdb_stdlog, "move float to int");
+
+		  if (!(opcode & 0x01))
+		    record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
+		  else
+		    record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+		}
+            }
+        }
+    }
+  else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0e)
+    {
+      if (record_debug)
+	fprintf_unfiltered (gdb_stdlog, "SIMD copy");
+
+      /* Advanced SIMD copy instructions.  */
+      if (!bits (aarch64_insn_r->aarch64_insn, 21, 23)
+	  && !bit (aarch64_insn_r->aarch64_insn, 15)
+	  && bit (aarch64_insn_r->aarch64_insn, 10))
+	{
+	  if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07)
+	    record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
+	  else
+	    record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+	}
+      else
+	record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+    }
+  /* All remaining floating point or advanced SIMD instructions.  */
+  else
+    {
+      if (record_debug)
+	fprintf_unfiltered (gdb_stdlog, "all remain");
+
+      record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
+    }
+
+  if (record_debug)
+    fprintf_unfiltered (gdb_stdlog, "\n");
+
+  aarch64_insn_r->reg_rec_count++;
+  gdb_assert (aarch64_insn_r->reg_rec_count == 1);
+  REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
+	     record_buf);
+  return AARCH64_RECORD_SUCCESS;
+}
+
+/* Decodes insns type and invokes its record handler.  */
+
+static unsigned int
+aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r)
+{
+  uint32_t ins_bit25, ins_bit26, ins_bit27, ins_bit28;
+
+  ins_bit25 = bit (aarch64_insn_r->aarch64_insn, 25);
+  ins_bit26 = bit (aarch64_insn_r->aarch64_insn, 26);
+  ins_bit27 = bit (aarch64_insn_r->aarch64_insn, 27);
+  ins_bit28 = bit (aarch64_insn_r->aarch64_insn, 28);
+
+  /* Data processing - immediate instructions.  */
+  if (!ins_bit26 && !ins_bit27 && ins_bit28)
+    return aarch64_record_data_proc_imm (aarch64_insn_r);
+
+  /* Branch, exception generation and system instructions.  */
+  if (ins_bit26 && !ins_bit27 && ins_bit28)
+    return aarch64_record_branch_except_sys (aarch64_insn_r);
+
+  /* Load and store instructions.  */
+  if (!ins_bit25 && ins_bit27)
+    return aarch64_record_load_store (aarch64_insn_r);
+
+  /* Data processing - register instructions.  */
+  if (ins_bit25 && !ins_bit26 && ins_bit27)
+    return aarch64_record_data_proc_reg (aarch64_insn_r);
+
+  /* Data processing - SIMD and floating point instructions.  */
+  if (ins_bit25 && ins_bit26 && ins_bit27)
+    return aarch64_record_data_proc_simd_fp (aarch64_insn_r);
+
+  return AARCH64_RECORD_UNSUPPORTED;
+}
+
+/* Cleans up local record registers and memory allocations.  */
+
+static void
+deallocate_reg_mem (insn_decode_record *record)
+{
+  xfree (record->aarch64_regs);
+  xfree (record->aarch64_mems);
+}
+
+/* Parse the current instruction and record the values of the registers and
+   memory that will be changed in current instruction to record_arch_list
+   return -1 if something is wrong.  */
+
+int
+aarch64_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
+			CORE_ADDR insn_addr)
+{
+  uint32_t rec_no = 0;
+  uint8_t insn_size = 4;
+  uint32_t ret = 0;
+  ULONGEST t_bit = 0, insn_id = 0;
+  gdb_byte buf[insn_size];
+  insn_decode_record aarch64_record;
+
+  memset (&buf[0], 0, insn_size);
+  memset (&aarch64_record, 0, sizeof (insn_decode_record));
+  target_read_memory (insn_addr, &buf[0], insn_size);
+  aarch64_record.aarch64_insn
+    = (uint32_t) extract_unsigned_integer (&buf[0],
+					   insn_size,
+					   gdbarch_byte_order (gdbarch));
+  aarch64_record.regcache = regcache;
+  aarch64_record.this_addr = insn_addr;
+  aarch64_record.gdbarch = gdbarch;
+
+  ret = aarch64_record_decode_insn_handler (&aarch64_record);
+  if (ret == AARCH64_RECORD_UNSUPPORTED)
+    {
+      printf_unfiltered (_("Process record does not support instruction "
+			   "0x%0x at address %s.\n"),
+			 aarch64_record.aarch64_insn,
+			 paddress (gdbarch, insn_addr));
+      ret = -1;
+    }
+
+  if (0 == ret)
+    {
+      /* Record registers.  */
+      record_full_arch_list_add_reg (aarch64_record.regcache,
+				     AARCH64_PC_REGNUM);
+      /* Always record register CPSR.  */
+      record_full_arch_list_add_reg (aarch64_record.regcache,
+				     AARCH64_CPSR_REGNUM);
+      if (aarch64_record.aarch64_regs)
+	for (rec_no = 0; rec_no < aarch64_record.reg_rec_count; rec_no++)
+	  if (record_full_arch_list_add_reg (aarch64_record.regcache,
+					     aarch64_record.aarch64_regs[rec_no]))
+	    ret = -1;
+
+      /* Record memories.  */
+      if (aarch64_record.aarch64_mems)
+	for (rec_no = 0; rec_no < aarch64_record.mem_rec_count; rec_no++)
+	  if (record_full_arch_list_add_mem
+	      ((CORE_ADDR)aarch64_record.aarch64_mems[rec_no].addr,
+	       aarch64_record.aarch64_mems[rec_no].len))
+	    ret = -1;
+
+      if (record_full_arch_list_add_end ())
+	ret = -1;
+    }
+
+  deallocate_reg_mem (&aarch64_record);
+  return ret;
+}
diff --git a/gdb/aarch64-tdep.h b/gdb/aarch64-tdep.h
index 976ad32..af209a9 100644
--- a/gdb/aarch64-tdep.h
+++ b/gdb/aarch64-tdep.h
@@ -88,8 +88,14 @@  struct gdbarch_tdep
   struct type *vns_type;
   struct type *vnh_type;
   struct type *vnb_type;
+
+  /* syscall record.  */
+  int (*aarch64_syscall_record) (struct regcache *regcache, unsigned long svc_number);
 };
 
 extern struct target_desc *tdesc_aarch64;
 
+extern int aarch64_process_record (struct gdbarch *gdbarch,
+                               struct regcache *regcache, CORE_ADDR addr);
+
 #endif /* aarch64-tdep.h */
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index 8feda7c..4e4d6a9 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -45,7 +45,7 @@  aarch64*-*-linux*)
 	# Target: AArch64 linux
 	gdb_target_obs="aarch64-tdep.o aarch64-linux-tdep.o \
 			glibc-tdep.o linux-tdep.o solib-svr4.o \
-			symfile-mem.o"
+			symfile-mem.o linux-record.o"
 	build_gdbserver=yes
 	;;
 
diff --git a/gdb/linux-record.h b/gdb/linux-record.h
index ab39cb9..27bb700 100644
--- a/gdb/linux-record.h
+++ b/gdb/linux-record.h
@@ -174,6 +174,7 @@  struct linux_record_tdep
   int arg4;
   int arg5;
   int arg6;
+  int arg7;
 };
 
 /* Enum that defines the gdb-canonical set of Linux syscall identifiers.