[5/7] Support for recording syscall on aarch64-linux

This patch adds support for recording system call instruction on aarch64-linux
targets.

gdb:

2014-06-04  Omair Javaid  <omair.javaid@linaro.org>

	* aarch64-linux-tdep.c (record.h): Include.
	(record-full.h): Include.
	(struct linux_record_tdep aarch64_linux_record_tdep): Declared.
	(aarch64_canonicalize_syscall): New function.
	(aarch64_all_but_pc_registers_record): New function.
	(aarch64_linux_syscall_record): New function.
	(aarch64_linux_init_abi): Updated.
	* aarch64-linux-tdep.h (aarch64_syscall): New enum.
	* aarch64-tdep.c (aarch64_record_branch_except_sys): Updated.
	* aarch64-tdep.h 
	(struct gdbarch_tdep) <aarch64_syscall_record>: Defined.

---
 gdb/aarch64-linux-tdep.c | 924 +++++++++++++++++++++++++++++++++++++++++++++++
 gdb/aarch64-linux-tdep.h | 266 ++++++++++++++
 gdb/aarch64-tdep.c       |  15 +-
 gdb/aarch64-tdep.h       |   3 +
 4 files changed, 1207 insertions(+), 1 deletion(-)

On 4 June 2014 17:21, Omair Javaid <omair.javaid@linaro.org> wrote:
> This patch adds support for recording system call instruction on aarch64-linux
> targets.
>
> gdb:
>
> 2014-06-04  Omair Javaid  <omair.javaid@linaro.org>
>
>         * aarch64-linux-tdep.c (record.h): Include.
>         (record-full.h): Include.
>         (struct linux_record_tdep aarch64_linux_record_tdep): Declared.
>         (aarch64_canonicalize_syscall): New function.
>         (aarch64_all_but_pc_registers_record): New function.
>         (aarch64_linux_syscall_record): New function.
>         (aarch64_linux_init_abi): Updated.
>         * aarch64-linux-tdep.h (aarch64_syscall): New enum.
>         * aarch64-tdep.c (aarch64_record_branch_except_sys): Updated.
>         * aarch64-tdep.h
>         (struct gdbarch_tdep) <aarch64_syscall_record>: Defined.
>
> ---
>  gdb/aarch64-linux-tdep.c | 924 +++++++++++++++++++++++++++++++++++++++++++++++
>  gdb/aarch64-linux-tdep.h | 266 ++++++++++++++
>  gdb/aarch64-tdep.c       |  15 +-
>  gdb/aarch64-tdep.h       |   3 +
>  4 files changed, 1207 insertions(+), 1 deletion(-)
>
> diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
> index dece0c3..6d9a3bf 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"
> +
>  /* The general-purpose regset consists of 31 X registers, plus SP, PC,
>     and PSTATE registers, as defined in the AArch64 port of the Linux
>     kernel.  */
> @@ -421,6 +424,769 @@ aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
>    return 1;
>  }
>
> +/* Aarch64 process record-replay constructs: syscall, signal etc.  */

To be precise it is "AArch64".

> +
> +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_mmap:
> +    return gdb_sys_mmap2;
> +
> +  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_dup3:
> +    return gdb_sys_dup2;
> +
> +  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_sendfile64;
> +
> +  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_chmod;
> +
> +  case aarch64_sys_fchmod:
> +    return gdb_sys_fchmod;
> +
> +  case aarch64_sys_fchownat:
> +    return gdb_sys_chown;
> +
> +  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_umount2:
> +    return gdb_sys_umount;
> +
> +  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_time;

Should this be 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_wait;
> +
> +  case aarch64_sys_epoll_ctl:
> +    return gdb_sys_epoll_ctl;
> +
> +  case aarch64_sys_tgkill:
> +    return gdb_sys_tgkill;
> +
> +  case aarch64_sys_utimensat:
> +    return gdb_sys_utimes;
> +
> +  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_fanotify_init:
> +    return gdb_sys_inotify_init;
> +
> +  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;
> +
> +  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.  */

Comment needs updating.

> +
> +static int
> +aarch64_linux_syscall_record (struct regcache *regcache, unsigned long svc_number)
> +{
> +  int ret = 0;
> +  enum gdb_syscall syscall_gdb;
> +
> +  printf_unfiltered (_("syscall number %s\n"),
> +                       plongest (svc_number));
> +  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)
>  {
> @@ -471,6 +1237,164 @@ 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;
> +
> +  aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 1;
> +  aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 2;
> +  aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 3;
> +  aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;

Should there be arg5 and arg6 here too?

>  }
>
>  /* Provide a prototype to silence -Wmissing-prototypes.  */
> diff --git a/gdb/aarch64-linux-tdep.h b/gdb/aarch64-linux-tdep.h
> index e3d7ed7..b199726 100644
> --- a/gdb/aarch64-linux-tdep.h
> +++ b/gdb/aarch64-linux-tdep.h
> @@ -38,3 +38,269 @@ extern void aarch64_linux_supply_fpregset (const struct regset *regset,
>  extern void aarch64_linux_collect_fpregset (const struct regset *regset,
>                                      const struct regcache *regcache,
>                                      int regnum, void *fpregs_buf, size_t len);
> +
> +/* 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 bb533b2..2e2dc15 100644
> --- a/gdb/aarch64-tdep.c
> +++ b/gdb/aarch64-tdep.c
> @@ -2943,7 +2943,20 @@ aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r)
>      {
>        /* Exception generation instructions. */
>        if (insn_bits24_27 == 0x04)
> -        return AARCH64_RECORD_USUPPORTED;
> +        {
> +          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_USUPPORTED;
> +        }
>        /* 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 8a193f4..21c3bd3 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);

Should this use ULONGEST instead of unsigned long? On 32bit
architectures they are different sizes.

On Wed, Jun 04 2014, Omair Javaid wrote:

> This patch adds support for recording system call instruction on aarch64-linux
> targets.
>
> [...]
> @@ -471,6 +1237,164 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
> [...]
> +
> +  aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 1;
> +  aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 2;
> +  aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 3;
> +  aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;

Is this a typo?  Otherwise the reason for this specialty should be
documented in a comment here, IMO.

On 6 June 2014 20:58, Andreas Arnez <arnez@linux.vnet.ibm.com> wrote:
> On Wed, Jun 04 2014, Omair Javaid wrote:
>
>> This patch adds support for recording system call instruction on aarch64-linux
>> targets.
>>
>> [...]
>> @@ -471,6 +1237,164 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
>> [...]
>> +
>> +  aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 1;
>> +  aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 2;
>> +  aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 3;
>> +  aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;
>
> Is this a typo?  Otherwise the reason for this specialty should be
> documented in a comment here, IMO.
>
After a bit of digging up found out that AArch64 system calls take
between 0 and 7 arguments in register x1 to x7. I will update this
change with comment in upcoming update to this patch.