[v4,3/5] Support for recording syscall on aarch64-linux

Message ID 1422926216-15740-4-git-send-email-omair.javaid@linaro.org
State New
Headers show

Commit Message

Omair Javaid Feb. 3, 2015, 1:16 a.m.
gdb:

2015-02-02  Omair Javaid  <omair.javaid@linaro.org>

	* aarch64-linux-tdep.c (linux-record): Include.
	(record-full.h): Include.
	(struct linux_record_tdep aarch64_linux_record_tdep): Declare.
	(aarch64_canonicalize_syscall): New function to translate syscall
	numbers from aarch64 to canonical.
	(aarch64_all_but_pc_registers_record): New function.
	(aarch64_linux_syscall_record): New function.
	(aarch64_linux_init_abi): Update to handle syscall recording.
	* aarch64-linux-tdep.h (aarch64_syscall): New enum.
	* aarch64-tdep.c (aarch64_record_branch_except_sys): Add code to
	handle recording of syscalls.
	* aarch64-tdep.h
	(struct gdbarch_tdep) <aarch64_syscall_record>: Defined.
	* linux-record.h (struct linux_record_tdep): Add two more syscall
	argument fields.
        * configure.tgt: Add linux-record.o to gdb_target_obs.
---
 gdb/aarch64-linux-tdep.c | 914 +++++++++++++++++++++++++++++++++++++++++++++++
 gdb/aarch64-linux-tdep.h | 266 ++++++++++++++
 gdb/aarch64-tdep.c       |  15 +-
 gdb/aarch64-tdep.h       |   3 +
 gdb/configure.tgt        |   2 +-
 gdb/linux-record.h       |   2 +
 6 files changed, 1200 insertions(+), 2 deletions(-)

Patch hide | download patch | download mbox

diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 10a53d4..597beab 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -41,6 +41,9 @@ 
 #include "user-regs.h"
 #include <ctype.h>
 
+#include "record-full.h"
+#include "linux-record.h"
+
 /* Signal frame handling.
 
       +------------+  ^
@@ -341,6 +344,753 @@  aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
   return 1;
 }
 
+/* AArch64 process record-replay constructs: syscall, signal etc.  */
+
+struct linux_record_tdep aarch64_linux_record_tdep;
+
+/* 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)
+{
+  switch (syscall_number) {
+  case aarch64_sys_read:
+    return gdb_sys_read;
+
+  case aarch64_sys_write:
+    return gdb_sys_write;
+
+  case aarch64_sys_open:
+    return gdb_sys_open;
+
+  case aarch64_sys_close:
+    return gdb_sys_close;
+
+  case aarch64_sys_lseek:
+    return gdb_sys_lseek;
+
+  case aarch64_sys_mprotect:
+    return gdb_sys_mprotect;
+
+  case aarch64_sys_munmap:
+    return gdb_sys_munmap;
+
+  case aarch64_sys_brk:
+    return gdb_sys_brk;
+
+  case aarch64_sys_rt_sigaction:
+    return gdb_sys_rt_sigaction;
+
+  case aarch64_sys_rt_sigprocmask:
+    return gdb_sys_rt_sigprocmask;
+
+  case aarch64_sys_rt_sigreturn:
+    return gdb_sys_rt_sigreturn;
+
+  case aarch64_sys_ioctl:
+    return gdb_sys_ioctl;
+
+  case aarch64_sys_pread64:
+    return gdb_sys_pread64;
+
+  case aarch64_sys_pwrite64:
+    return gdb_sys_pwrite64;
+
+  case aarch64_sys_readv:
+    return gdb_sys_readv;
+
+  case aarch64_sys_writev:
+    return gdb_sys_writev;
+
+  case aarch64_sys_sched_yield:
+    return gdb_sys_sched_yield;
+
+  case aarch64_sys_mremap:
+    return gdb_sys_mremap;
+
+  case aarch64_sys_msync:
+    return gdb_sys_msync;
+
+  case aarch64_sys_mincore:
+    return gdb_sys_mincore;
+
+  case aarch64_sys_madvise:
+    return gdb_sys_madvise;
+
+  case aarch64_sys_shmget:
+    return gdb_sys_shmget;
+
+  case aarch64_sys_shmat:
+    return gdb_sys_shmat;
+
+  case aarch64_sys_shmctl:
+    return gdb_sys_shmctl;
+
+  case aarch64_sys_dup:
+    return gdb_sys_dup;
+
+  case aarch64_sys_nanosleep:
+    return gdb_sys_nanosleep;
+
+  case aarch64_sys_getitimer:
+    return gdb_sys_getitimer;
+
+  case aarch64_sys_setitimer:
+    return gdb_sys_setitimer;
+
+  case aarch64_sys_getpid:
+    return gdb_sys_getpid;
+
+  case aarch64_sys_sendfile:
+    return gdb_sys_sendfile;
+
+  case aarch64_sys_socket:
+    return gdb_sys_socket;
+
+  case aarch64_sys_connect:
+    return gdb_sys_connect;
+
+  case aarch64_sys_accept:
+    return gdb_sys_accept;
+
+  case aarch64_sys_sendto:
+    return gdb_sys_sendto;
+
+  case aarch64_sys_recvfrom:
+    return gdb_sys_recvfrom;
+
+  case aarch64_sys_sendmsg:
+    return gdb_sys_sendmsg;
+
+  case aarch64_sys_recvmsg:
+    return gdb_sys_recvmsg;
+
+  case aarch64_sys_shutdown:
+    return gdb_sys_shutdown;
+
+  case aarch64_sys_bind:
+    return gdb_sys_bind;
+
+  case aarch64_sys_listen:
+    return gdb_sys_listen;
+
+  case aarch64_sys_getsockname:
+    return gdb_sys_getsockname;
+
+  case aarch64_sys_getpeername:
+    return gdb_sys_getpeername;
+
+  case aarch64_sys_socketpair:
+    return gdb_sys_socketpair;
+
+  case aarch64_sys_setsockopt:
+    return gdb_sys_setsockopt;
+
+  case aarch64_sys_getsockopt:
+    return gdb_sys_getsockopt;
+
+  case aarch64_sys_clone:
+    return gdb_sys_clone;
+
+  case aarch64_sys_execve:
+    return gdb_sys_execve;
+
+  case aarch64_sys_exit:
+    return gdb_sys_exit;
+
+  case aarch64_sys_wait4:
+    return gdb_sys_wait4;
+
+  case aarch64_sys_kill:
+    return gdb_sys_kill;
+
+  case aarch64_sys_uname:
+    return gdb_sys_uname;
+
+  case aarch64_sys_semget:
+    return gdb_sys_semget;
+
+  case aarch64_sys_semop:
+    return gdb_sys_semop;
+
+  case aarch64_sys_semctl:
+    return gdb_sys_semctl;
+
+  case aarch64_sys_shmdt:
+    return gdb_sys_shmdt;
+
+  case aarch64_sys_msgget:
+    return gdb_sys_msgget;
+
+  case aarch64_sys_msgsnd:
+    return gdb_sys_msgsnd;
+
+  case aarch64_sys_msgrcv:
+    return gdb_sys_msgrcv;
+
+  case aarch64_sys_msgctl:
+    return gdb_sys_msgctl;
+
+  case aarch64_sys_fcntl:
+    return gdb_sys_fcntl;
+
+  case aarch64_sys_flock:
+    return gdb_sys_flock;
+
+  case aarch64_sys_fsync:
+    return gdb_sys_fsync;
+
+  case aarch64_sys_fdatasync:
+    return gdb_sys_fdatasync;
+
+  case aarch64_sys_truncate:
+    return gdb_sys_truncate;
+
+  case aarch64_sys_ftruncate:
+    return gdb_sys_ftruncate;
+
+  case aarch64_sys_getcwd:
+    return gdb_sys_getcwd;
+
+  case aarch64_sys_chdir:
+    return gdb_sys_chdir;
+
+  case aarch64_sys_fchdir:
+    return gdb_sys_fchdir;
+
+  case aarch64_sys_rename:
+    return gdb_sys_rename;
+
+  case aarch64_sys_mkdir:
+    return gdb_sys_mkdir;
+
+  case aarch64_sys_link:
+    return gdb_sys_link;
+
+  case aarch64_sys_unlink:
+    return gdb_sys_unlink;
+
+  case aarch64_sys_symlink:
+    return gdb_sys_symlink;
+
+  case aarch64_sys_readlink:
+    return gdb_sys_readlink;
+
+  case aarch64_sys_fchmodat:
+    return gdb_sys_fchmodat;
+
+  case aarch64_sys_fchmod:
+    return gdb_sys_fchmod;
+
+  case aarch64_sys_fchownat:
+    return gdb_sys_fchownat;
+
+  case aarch64_sys_fchown:
+    return gdb_sys_fchown;
+
+  case aarch64_sys_umask:
+    return gdb_sys_umask;
+
+  case aarch64_sys_gettimeofday:
+    return gdb_sys_gettimeofday;
+
+  case aarch64_sys_getrlimit:
+    return gdb_sys_getrlimit;
+
+  case aarch64_sys_getrusage:
+    return gdb_sys_getrusage;
+
+  case aarch64_sys_sysinfo:
+    return gdb_sys_sysinfo;
+
+  case aarch64_sys_ptrace:
+    return gdb_sys_ptrace;
+
+  case aarch64_sys_getuid:
+    return gdb_sys_getuid;
+
+  case aarch64_sys_syslog:
+    return gdb_sys_syslog;
+
+  case aarch64_sys_getgid:
+    return gdb_sys_getgid;
+
+  case aarch64_sys_setuid:
+    return gdb_sys_setuid;
+
+  case aarch64_sys_setgid:
+    return gdb_sys_setgid;
+
+  case aarch64_sys_geteuid:
+    return gdb_sys_geteuid;
+
+  case aarch64_sys_getegid:
+    return gdb_sys_getegid;
+
+  case aarch64_sys_setpgid:
+    return gdb_sys_setpgid;
+
+  case aarch64_sys_getppid:
+    return gdb_sys_getppid;
+
+  case aarch64_sys_setsid:
+    return gdb_sys_setsid;
+
+  case aarch64_sys_setreuid:
+    return gdb_sys_setreuid;
+
+  case aarch64_sys_setregid:
+    return gdb_sys_setregid;
+
+  case aarch64_sys_getgroups:
+    return gdb_sys_getgroups;
+
+  case aarch64_sys_setgroups:
+    return gdb_sys_setgroups;
+
+  case aarch64_sys_setresuid:
+    return gdb_sys_setresuid;
+
+  case aarch64_sys_getresuid:
+    return gdb_sys_getresuid;
+
+  case aarch64_sys_setresgid:
+    return gdb_sys_setresgid;
+
+  case aarch64_sys_getresgid:
+    return gdb_sys_getresgid;
+
+  case aarch64_sys_getpgid:
+    return gdb_sys_getpgid;
+
+  case aarch64_sys_setfsuid:
+    return gdb_sys_setfsuid;
+
+  case aarch64_sys_setfsgid:
+    return gdb_sys_setfsgid;
+
+  case aarch64_sys_getsid:
+    return gdb_sys_getsid;
+
+  case aarch64_sys_capget:
+    return gdb_sys_capget;
+
+  case aarch64_sys_capset:
+    return gdb_sys_capset;
+
+  case aarch64_sys_rt_sigpending:
+    return gdb_sys_rt_sigpending;
+
+  case aarch64_sys_rt_sigtimedwait:
+    return gdb_sys_rt_sigtimedwait;
+
+  case aarch64_sys_rt_sigqueueinfo:
+    return gdb_sys_rt_sigqueueinfo;
+
+  case aarch64_sys_rt_sigsuspend:
+    return gdb_sys_rt_sigsuspend;
+
+  case aarch64_sys_sigaltstack:
+    return gdb_sys_sigaltstack;
+
+  case aarch64_sys_mknod:
+    return gdb_sys_mknod;
+
+  case aarch64_sys_personality:
+    return gdb_sys_personality;
+
+  case aarch64_sys_statfs:
+    return gdb_sys_statfs;
+
+  case aarch64_sys_fstat:
+    return gdb_sys_fstat;
+
+  case aarch64_sys_fstatfs:
+    return gdb_sys_fstatfs;
+
+  case aarch64_sys_getpriority:
+    return gdb_sys_getpriority;
+
+  case aarch64_sys_setpriority:
+    return gdb_sys_setpriority;
+
+  case aarch64_sys_sched_setparam:
+    return gdb_sys_sched_setparam;
+
+  case aarch64_sys_sched_getparam:
+    return gdb_sys_sched_getparam;
+
+  case aarch64_sys_sched_setscheduler:
+    return gdb_sys_sched_setscheduler;
+
+  case aarch64_sys_sched_getscheduler:
+    return gdb_sys_sched_getscheduler;
+
+  case aarch64_sys_sched_get_priority_max:
+    return gdb_sys_sched_get_priority_max;
+
+  case aarch64_sys_sched_get_priority_min:
+    return gdb_sys_sched_get_priority_min;
+
+  case aarch64_sys_sched_rr_get_interval:
+    return gdb_sys_sched_rr_get_interval;
+
+  case aarch64_sys_mlock:
+    return gdb_sys_mlock;
+
+  case aarch64_sys_munlock:
+    return gdb_sys_munlock;
+
+  case aarch64_sys_mlockall:
+    return gdb_sys_mlockall;
+
+  case aarch64_sys_munlockall:
+    return gdb_sys_munlockall;
+
+  case aarch64_sys_vhangup:
+    return gdb_sys_vhangup;
+
+  case aarch64_sys_prctl:
+    return gdb_sys_prctl;
+
+  case aarch64_sys_adjtimex:
+    return gdb_sys_adjtimex;
+
+  case aarch64_sys_setrlimit:
+    return gdb_sys_setrlimit;
+
+  case aarch64_sys_chroot:
+    return gdb_sys_chroot;
+
+  case aarch64_sys_sync:
+    return gdb_sys_sync;
+
+  case aarch64_sys_acct:
+    return gdb_sys_acct;
+
+  case aarch64_sys_settimeofday:
+    return gdb_sys_settimeofday;
+
+  case aarch64_sys_mount:
+    return gdb_sys_mount;
+
+  case aarch64_sys_swapon:
+    return gdb_sys_swapon;
+
+  case aarch64_sys_swapoff:
+    return gdb_sys_swapoff;
+
+  case aarch64_sys_reboot:
+    return gdb_sys_reboot;
+
+  case aarch64_sys_sethostname:
+    return gdb_sys_sethostname;
+
+  case aarch64_sys_setdomainname:
+    return gdb_sys_setdomainname;
+
+  case aarch64_sys_init_module:
+    return gdb_sys_init_module;
+
+  case aarch64_sys_delete_module:
+    return gdb_sys_delete_module;
+
+  case aarch64_sys_quotactl:
+    return gdb_sys_quotactl;
+
+  case aarch64_sys_nfsservctl:
+    return gdb_sys_nfsservctl;
+
+  case aarch64_sys_gettid:
+    return gdb_sys_gettid;
+
+  case aarch64_sys_readahead:
+    return gdb_sys_readahead;
+
+  case aarch64_sys_setxattr:
+    return gdb_sys_setxattr;
+
+  case aarch64_sys_lsetxattr:
+    return gdb_sys_lsetxattr;
+
+  case aarch64_sys_fsetxattr:
+    return gdb_sys_fsetxattr;
+
+  case aarch64_sys_getxattr:
+    return gdb_sys_getxattr;
+
+  case aarch64_sys_lgetxattr:
+    return gdb_sys_lgetxattr;
+
+  case aarch64_sys_fgetxattr:
+    return gdb_sys_fgetxattr;
+
+  case aarch64_sys_listxattr:
+    return gdb_sys_listxattr;
+
+  case aarch64_sys_llistxattr:
+    return gdb_sys_llistxattr;
+
+  case aarch64_sys_flistxattr:
+    return gdb_sys_flistxattr;
+
+  case aarch64_sys_removexattr:
+    return gdb_sys_removexattr;
+
+  case aarch64_sys_lremovexattr:
+    return gdb_sys_lremovexattr;
+
+  case aarch64_sys_fremovexattr:
+    return gdb_sys_fremovexattr;
+
+  case aarch64_sys_tkill:
+    return gdb_sys_tkill;
+
+  case aarch64_sys_times:
+    return gdb_sys_times;
+
+  case aarch64_sys_futex:
+    return gdb_sys_futex;
+
+  case aarch64_sys_sched_setaffinity:
+    return gdb_sys_sched_setaffinity;
+
+  case aarch64_sys_sched_getaffinity:
+    return gdb_sys_sched_getaffinity;
+
+  case aarch64_sys_io_setup:
+    return gdb_sys_io_setup;
+
+  case aarch64_sys_io_destroy:
+    return gdb_sys_io_destroy;
+
+  case aarch64_sys_io_getevents:
+    return gdb_sys_io_getevents;
+
+  case aarch64_sys_io_submit:
+    return gdb_sys_io_submit;
+
+  case aarch64_sys_io_cancel:
+    return gdb_sys_io_cancel;
+
+  case aarch64_sys_lookup_dcookie:
+    return gdb_sys_lookup_dcookie;
+
+  case aarch64_sys_epoll_create1:
+    return gdb_sys_epoll_create;
+
+  case aarch64_sys_remap_file_pages:
+    return gdb_sys_remap_file_pages;
+
+  case aarch64_sys_getdents64:
+    return gdb_sys_getdents64;
+
+  case aarch64_sys_set_tid_address:
+    return gdb_sys_set_tid_address;
+
+  case aarch64_sys_semtimedop:
+    return gdb_sys_semtimedop;
+
+  case aarch64_sys_fadvise64:
+    return gdb_sys_fadvise64;
+
+  case aarch64_sys_timer_create:
+    return gdb_sys_timer_create;
+
+  case aarch64_sys_timer_settime:
+    return gdb_sys_timer_settime;
+
+  case aarch64_sys_timer_gettime:
+    return gdb_sys_timer_gettime;
+
+  case aarch64_sys_timer_getoverrun:
+    return gdb_sys_timer_getoverrun;
+
+  case aarch64_sys_timer_delete:
+    return gdb_sys_timer_delete;
+
+  case aarch64_sys_clock_settime:
+    return gdb_sys_clock_settime;
+
+  case aarch64_sys_clock_gettime:
+    return gdb_sys_clock_gettime;
+
+  case aarch64_sys_clock_getres:
+    return gdb_sys_clock_getres;
+
+  case aarch64_sys_clock_nanosleep:
+    return gdb_sys_clock_nanosleep;
+
+  case aarch64_sys_exit_group:
+    return gdb_sys_exit_group;
+
+  case aarch64_sys_epoll_pwait:
+    return gdb_sys_epoll_pwait;
+
+  case aarch64_sys_epoll_ctl:
+    return gdb_sys_epoll_ctl;
+
+  case aarch64_sys_tgkill:
+    return gdb_sys_tgkill;
+
+  case aarch64_sys_mbind:
+    return gdb_sys_mbind;
+
+  case aarch64_sys_set_mempolicy:
+    return gdb_sys_set_mempolicy;
+
+  case aarch64_sys_get_mempolicy:
+    return gdb_sys_get_mempolicy;
+
+  case aarch64_sys_mq_open:
+    return gdb_sys_mq_open;
+
+  case aarch64_sys_mq_unlink:
+    return gdb_sys_mq_unlink;
+
+  case aarch64_sys_mq_timedsend:
+    return gdb_sys_mq_timedsend;
+
+  case aarch64_sys_mq_timedreceive:
+    return gdb_sys_mq_timedreceive;
+
+  case aarch64_sys_mq_notify:
+    return gdb_sys_mq_notify;
+
+  case aarch64_sys_mq_getsetattr:
+    return gdb_sys_mq_getsetattr;
+
+  case aarch64_sys_kexec_load:
+    return gdb_sys_kexec_load;
+
+  case aarch64_sys_waitid:
+    return gdb_sys_waitid;
+
+  case aarch64_sys_add_key:
+    return gdb_sys_add_key;
+
+  case aarch64_sys_request_key:
+    return gdb_sys_request_key;
+
+  case aarch64_sys_keyctl:
+    return gdb_sys_keyctl;
+
+  case aarch64_sys_ioprio_set:
+    return gdb_sys_ioprio_set;
+
+  case aarch64_sys_ioprio_get:
+    return gdb_sys_ioprio_get;
+
+  case aarch64_sys_inotify_add_watch:
+    return gdb_sys_inotify_add_watch;
+
+  case aarch64_sys_inotify_rm_watch:
+    return gdb_sys_inotify_rm_watch;
+
+  case aarch64_sys_migrate_pages:
+    return gdb_sys_migrate_pages;
+
+  case aarch64_sys_pselect6:
+    return gdb_sys_pselect6;
+
+  case aarch64_sys_ppoll:
+    return gdb_sys_ppoll;
+
+  case aarch64_sys_unshare:
+    return gdb_sys_unshare;
+
+  case aarch64_sys_set_robust_list:
+    return gdb_sys_set_robust_list;
+
+  case aarch64_sys_get_robust_list:
+    return gdb_sys_get_robust_list;
+
+  case aarch64_sys_splice:
+    return gdb_sys_splice;
+
+  case aarch64_sys_tee:
+    return gdb_sys_tee;
+
+  case aarch64_sys_sync_file_range:
+    return gdb_sys_sync_file_range;
+
+  case aarch64_sys_vmsplice:
+    return gdb_sys_vmsplice;
+
+  case aarch64_sys_move_pages:
+    return gdb_sys_move_pages;
+
+  case aarch64_sys_mmap:
+    return gdb_sys_mmap2;
+
+  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 = 0; i < AARCH64_PC_REGNUM; i++)
+    if (record_full_arch_list_add_reg (regcache, AARCH64_X0_REGNUM + i))
+      return -1;
+
+  if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
+    return -1;
+
+  return 0;
+}
+
+/* Handler for arm 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)
 {
@@ -388,6 +1138,170 @@  aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 
   /* 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-x7 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;
+  aarch64_linux_record_tdep.arg8 = AARCH64_X0_REGNUM + 7;
 }
 
 /* Provide a prototype to silence -Wmissing-prototypes.  */
diff --git a/gdb/aarch64-linux-tdep.h b/gdb/aarch64-linux-tdep.h
index 9d09ae6..4475f2e 100644
--- a/gdb/aarch64-linux-tdep.h
+++ b/gdb/aarch64-linux-tdep.h
@@ -32,3 +32,269 @@ 
 
 extern const struct regset aarch64_linux_gregset;
 extern const struct regset aarch64_linux_fpregset;
+
+/* 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,
+};
diff --git a/gdb/aarch64-tdep.c b/gdb/aarch64-tdep.c
index ab9e83f..faa650a 100644
--- a/gdb/aarch64-tdep.c
+++ b/gdb/aarch64-tdep.c
@@ -3002,7 +3002,20 @@  aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r)
     {
       /* Exception generation instructions. */
       if (insn_bits24_27 == 0x04)
-        return AARCH64_RECORD_UNSUPPORTED;
+        {
+          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)
         {
diff --git a/gdb/aarch64-tdep.h b/gdb/aarch64-tdep.h
index 6f27ec8..63051f9 100644
--- a/gdb/aarch64-tdep.h
+++ b/gdb/aarch64-tdep.h
@@ -88,6 +88,9 @@  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 int aarch64_process_record (struct gdbarch *gdbarch,
diff --git a/gdb/configure.tgt b/gdb/configure.tgt
index 7fdd34e..d018cf9 100644
--- a/gdb/configure.tgt
+++ b/gdb/configure.tgt
@@ -43,7 +43,7 @@  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..34dad52 100644
--- a/gdb/linux-record.h
+++ b/gdb/linux-record.h
@@ -174,6 +174,8 @@  struct linux_record_tdep
   int arg4;
   int arg5;
   int arg6;
+  int arg7;
+  int arg8;
 };
 
 /* Enum that defines the gdb-canonical set of Linux syscall identifiers.