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title: List of linux syscalls
keywords:linux,syscalls,x86_64,kernel
# List of linux x86_64 syscalls
## Intro
Manually generated list of syscalls. Latest update is for 6.7-rc1
## Syscalls
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| N | Syscall | Params | RAX | RDI | RSI | RDX | R10 | R8 | R9 |
|---|---|---|---|---|---|---|---|---|---|
|0|sys_read|3|0x00|unsigned int fd|char *buf|size_t count||||
|1|sys_write|3|0x01|unsigned int fd|const char *buf|size_t count||||
|2|sys_open|3|0x02|const char *filename|int flags|int mode||||
|3|sys_close|1|0x03|unsigned int fd||||||
|4|sys_stat|2|0x04|const char *filename|struct stat *statbuf|||||
|5|sys_fstat|2|0x05|unsigned int fd|struct stat *statbuf|||||
|6|sys_lstat|2|0x06|const char *filename|struct stat *statbuf|||||
|7|sys_poll|3|0x07|struct poll_fd *ufds|unsigned int nfds|long timeout_msecs||||
|8|sys_lseek|3|0x08|unsigned int fd|off_t offset|unsigned int origin||||
|9|sys_mmap|6|0x09|unsigned long addr|unsigned long len|unsigned long prot|unsigned long flags|unsigned long fd|unsigned long off|
|10|sys_mprotect|3|0x0a|unsigned long start|size_t len|unsigned long prot||||
|11|sys_munmap|2|0x0b|unsigned long addr|size_t len|||||
|12|sys_brk|1|0x0c|unsigned long brk||||||
|13|sys_rt_sigaction|4|0x0d|int sig|const struct sigaction *act|struct sigaction *oact|size_t sigsetsize|||
|14|sys_rt_sigprocmask|4|0x0e|int how|sigset_t *nset|sigset_t *oset|size_t sigsetsize|||
|15|sys_rt_sigreturn|1|0x0f|unsigned long __unused||||||
|16|sys_ioctl|3|0x10|unsigned int fd|unsigned int cmd|unsigned long arg||||
|17|sys_pread64|4|0x11|unsigned int fd|char *buf|size_t count|loff_t pos|||
|18|sys_pwrite64|4|0x12|unsigned int fd|const char *buf|size_t count|loff_t pos|||
|19|sys_readv|3|0x13|unsigned long fd|const struct iovec *vec|unsigned long vlen||||
|20|sys_writev|3|0x14|unsigned long fd|const struct iovec *vec|unsigned long vlen||||
|21|sys_access|2|0x15|const char *filename|int mode|||||
|22|sys_pipe|1|0x16|int *filedes||||||
|23|sys_select|5|0x17|int n|fd_set *inp|fd_set *outp|fd_set *exp|struct timeval *tvp||
|24|sys_sched_yield|0|0x18|||||||
|25|sys_mremap|5|0x19|unsigned long addr|unsigned long old_len|unsigned long new_len|unsigned long flags|unsigned long new_addr||
|26|sys_msync|3|0x1a|unsigned long start|size_t len|int flags||||
|27|sys_mincore|3|0x1b|unsigned long start|size_t len|unsigned char *vec||||
|28|sys_madvise|3|0x1c|unsigned long start|size_t len_in|int behavior||||
|29|sys_shmget|3|0x1d|key_t key|size_t size|int shmflg||||
|30|sys_shmat|3|0x1e|int shmid|char *shmaddr|int shmflg||||
|31|sys_shmctl|3|0x1f|int shmid|int cmd|struct shmid_ds *buf||||
|32|sys_dup|1|0x20|unsigned int fildes||||||
|33|sys_dup2|2|0x21|unsigned int oldfd|unsigned int newfd|||||
|34|sys_pause|0|0x22|||||||
|35|sys_nanosleep|2|0x23|struct timespec *rqtp|struct timespec *rmtp|||||
|36|sys_getitimer|2|0x24|int which|struct itimerval *value|||||
|37|sys_alarm|1|0x25|unsigned int seconds||||||
|38|sys_setitimer|3|0x26|int which|struct itimerval *value|struct itimerval *ovalue||||
|39|sys_getpid|0|0x27|||||||
|40|sys_sendfile64|4|0x28|int out_fd|int in_fd|off_t *offset|size_t count|||
|41|sys_socket|3|0x29|int family|int type|int protocol||||
|42|sys_connect|3|0x2a|int fd|struct sockaddr *uservaddr| int addrlen||||
|43|sys_accept|3|0x2b|int fd|struct sockaddr *upeer_sockaddr|int *upeer_addrlen||||
|44|sys_sendto|6|0x2c|int fd|void *buff|size_t len|unsigned flags|struct sockaddr *addr|int addr_len|
|45|sys_recvfrom|6|0x2d|int fd|void *ubuf|size_t size|unsigned flags|struct sockaddr *addr|int *addr_len|
|46|sys_sendmsg|3|0x2e|int fd|struct msghdr *msg|unsigned flags||||
|47|sys_recvmsg|3|0x2f|int fd|struct msghdr *msg|unsigned flags||||
|48|sys_shutdown|2|0x30|int fd|int how|||||
|49|sys_bind|3|0x31|int fd|struct sockaddr *umyaddr|int addrlen||||
|50|sys_listen|2|0x32|int fd|int backlog|||||
|51|sys_getsockname|3|0x33|int fd|struct sockaddr *usockaddr|int *usockaddr_len||||
|52|sys_getpeername|3|0x34|int fd|struct sockaddr *usockaddr|int *usockaddr_len||||
|53|sys_socketpair|4|0x35|int family|int type|int protocol|int *usockvec|||
|54|sys_setsockopt|5|0x36|int fd|int level|int optname|char *optval| int optlen||
|55|sys_getsockopt|5|0x37|int fd|int level|int optname|char *optval|int *optlen||
|56|sys_clone|4|0x38|unsigned long clone_flags|unsigned long newsp|void *parent_tid|void *child_tid|||
|57|sys_fork|0|0x39|||||||
|58|sys_vfork|0|0x3a|||||||
|59|sys_execve|3|0x3b|const char *filename|const char **argv|const char **envp||||
|60|sys_exit|1|0x3c|int error_code||||||
|61|sys_wait4|4|0x3d|pid_t upid|int *stat_addr|int options|struct rusage *ru|||
|62|sys_kill|2|0x3e|pid_t pid|int sig|||||
|63|sys_newuname|1|0x3f|struct new_utsname *name||||||
|64|sys_semget|3|0x40|key_t key|int nsems|int semflg||||
|65|sys_semop|3|0x41|int semid|struct sembuf *tsops|unsigned nsops||||
|66|sys_semctl|4|0x42|int semid|int semnum|int cmd|unsigned long arg|||
|67|sys_shmdt|1|0x43|char *shmaddr||||||
|68|sys_msgget|2|0x44|key_t key|int msgflg|||||
|69|sys_msgsnd|4|0x45|int msqid|struct msgbuf *msgp|size_t msgsz|int msgflg|||
|70|sys_msgrcv|5|0x46|int msqid|struct msgbuf *msgp|size_t msgsz|long msgtyp|int msgflg||
|71|sys_msgctl|3|0x47|int msqid|int cmd|struct msqid_ds *buf||||
|72|sys_fcntl|3|0x48|unsigned int fd|unsigned int cmd|unsigned long arg||||
|73|sys_flock|2|0x49|unsigned int fd|unsigned int cmd|||||
|74|sys_fsync|1|0x4a|unsigned int fd||||||
|75|sys_fdatasync|1|0x4b|unsigned int fd||||||
|76|sys_truncate|2|0x4c|const char *path|long length|||||
|77|sys_ftruncate|2|0x4d|unsigned int fd|unsigned long length|||||
|78|sys_getdents|3|0x4e|unsigned int fd|struct linux_dirent *dirent|unsigned int count||||
|79|sys_getcwd|2|0x4f|char *buf|unsigned long size|||||
|80|sys_chdir|1|0x50|const char *filename||||||
|81|sys_fchdir|1|0x51|unsigned int fd||||||
|82|sys_rename|2|0x52|const char *oldname|const char *newname|||||
|83|sys_mkdir|2|0x53|const char *pathname|int mode|||||
|84|sys_rmdir|1|0x54|const char *pathname||||||
|85|sys_creat|2|0x55|const char *pathname|int mode|||||
|86|sys_link|2|0x56|const char *oldname|const char *newname|||||
|87|sys_unlink|1|0x57|const char *pathname||||||
|88|sys_symlink|2|0x58|const char *oldname|const char *newname|||||
|89|sys_readlink|3|0x59|const char *path|char *buf|int bufsiz||||
|90|sys_chmod|2|0x5a|const char *filename|mode_t mode|||||
|91|sys_fchmod|2|0x5b|unsigned int fd|mode_t mode|||||
|92|sys_chown|3|0x5c|const char *filename|uid_t user|gid_t group||||
|93|sys_fchown|3|0x5d|unsigned int fd|uid_t user|gid_t group||||
|94|sys_lchown|3|0x5e|const char *filename|uid_t user|gid_t group||||
|95|sys_umask|1|0x5f|int mask||||||
|96|sys_gettimeofday|2|0x60|struct timeval *tv|struct timezone *tz|||||
|97|sys_getrlimit|1|0x61|unsigned int resource|struct rlimit *rlim|||||
|98|sys_getrusage|2|0x62|int who|struct rusage *ru|||||
|99|sys_sysinfo|1|0x63|struct sysinfo *info||||||
|100|sys_times|1|0x64|struct sysinfo *info||||||
|101|sys_ptrace|4|0x65|long request|long pid|unsigned long addr|unsigned long data|||
|102|sys_getuid|0|0x66|||||||
|103|sys_syslog|3|0x67|int type|char *buf|int len||||
|104|sys_getgid|0|0x68|||||||
|105|sys_setuid|1|0x69|uid_t uid||||||
|106|sys_setgid|1|0x6a|gid_t gid||||||
|107|sys_geteuid|0|0x6b|||||||
|108|sys_getegid|0|0x6c|||||||
|109|sys_setpgid|2|0x6d|pid_t pid|pid_t pgid|||||
|110|sys_getppid|0|0x6e|||||||
|111|sys_getpgrp|0|0x6f|||||||
|112|sys_setsid|0|0x70|||||||
|113|sys_setreuid|2|0x71|uid_t ruid|uid_t euid|||||
|114|sys_setregid|2|0x72|gid_t rgid|gid_t egid|||||
|115|sys_getgroups|2|0x73|int gidsetsize|gid_t *grouplist|||||
|116|sys_setgroups|2|0x74|int gidsetsize|gid_t *grouplist|||||
|117|sys_setresuid|3|0x75|uid_t *ruid|uid_t *euid|uid_t *suid||||
|118|sys_getresuid|3|0x76|uid_t *ruid|uid_t *euid|uid_t *suid||||
|119|sys_setresgid|3|0x77|gid_t rgid|gid_t egid|gid_t sgid||||
|120|sys_getresgid|3|0x78|gid_t *rgid|gid_t *egid|gid_t *sgid||||
|121|sys_getpgid|1|0x79|pid_t pid||||||
|122|sys_setfsuid|1|0x7a|uid_t uid||||||
|123|sys_setfsgid|1|0x7b|gid_t gid||||||
|124|sys_getsid|1|0x7c|pid_t pid||||||
|125|sys_capget|2|0x7d|cap_user_header_t header|cap_user_data_t dataptr|||||
|126|sys_capset|2|0x7e|cap_user_header_t header|const cap_user_data_t data|||||
|127|sys_rt_sigpending|2|0x7f|sigset_t *set|size_t sigsetsize|||||
|128|sys_rt_sigtimedwait|4|0x80|const sigset_t *uthese|siginfo_t *uinfo|const struct timespec *uts|size_t sigsetsize|||
|129|sys_rt_sigqueueinfo|3|0x81|pid_t pid|int sig|siginfo_t *uinfo||||
|130|sys_rt_sigsuspend|2|0x82|sigset_t *unewset|size_t sigsetsize|||||
|131|sys_sigaltstack|2|0x83|const stack_t *uss|stack_t *uoss|||||
|132|sys_utime|2|0x84|char *filename|struct utimbuf *times|||||
|133|sys_mknod|3|0x85|const char *filename|int mode|unsigned dev||||
|134|sys_uselib|1|0x86|const char *library||||||
|135|sys_personality|1|0x87|unsigned int personality||||||
|136|sys_ustat|2|0x88|unsigned dev|struct ustat *ubuf|||||
|137|sys_statfs|2|0x89|const char *pathname|struct statfs *buf|||||
|138|sys_fstatfs|2|0x8a|unsigned int fd|struct statfs *buf|||||
|139|sys_sysfs|3|0x8b|int option|unsigned long arg1|unsigned long arg2||||
|140|sys_getpriority|2|0x8c|int which|int who|||||
|141|sys_setpriority|3|0x8d|int which|int who|int niceval||||
|142|sys_sched_setparam|2|0x8e|pid_t pid|struct sched_param *param|||||
|143|sys_sched_getparam|2|0x8f|pid_t pid|struct sched_param *param|||||
|144|sys_sched_setscheduler|3|0x90|pid_t pid|int policy|struct sched_param *param||||
|145|sys_sched_getscheduler|1|0x91|pid_t pid||||||
|146|sys_sched_get_priority_max|1|0x92|int policy||||||
|147|sys_sched_get_priority_min|1|0x93|int policy||||||
|148|sys_sched_rr_get_interval|2|0x94|pid_t pid|struct timespec *interval|||||
|149|sys_mlock|2|0x95|unsigned long start|size_t len|||||
|150|sys_munlock|2|0x96|unsigned long start|size_t len|||||
|151|sys_mlockall|1|0x97|int flags||||||
|152|sys_munlockall|0|0x98|||||||
|153|sys_vhangup|0|0x99|||||||
|154|sys_modify_ldt|3|0x9a|int func|void *ptr|unsigned long bytecount||||
|155|sys_pivot_root|2|0x9b|const char *new_root|const char *put_old|||||
|1|sys_sysctl|1|0x01|struct __sysctl_args *args||||||
|157|sys_prctl|4|0x9d|int option|unsigned long arg2|unsigned long arg3|unsigned long arg4|||
|158|sys_arch_prctl|3|0x9e|struct task_struct *task|int code|unsigned long *addr||||
|159|sys_adjtimex|1|0x9f|struct timex *txc_p||||||
|160|sys_setrlimit|2|0xa0|unsigned int resource|struct rlimit *rlim|||||
|161|sys_chroot|1|0xa1|const char *filename||||||
|162|sys_sync|0|0xa2|||||||
|163|sys_acct|1|0xa3|const char *name||||||
|164|sys_settimeofday|2|0xa4|struct timeval *tv|struct timezone *tz|||||
|165|sys_mount|5|0xa5|char *dev_name|char *dir_name|char *type|unsigned long flags|void *data||
|166|sys_umount2|2|0xa6|const char *target|int flags|||||
|167|sys_swapon|2|0xa7|const char *specialfile|int swap_flags|||||
|168|sys_swapoff|1|0xa8|const char *specialfile||||||
|169|sys_reboot|4|0xa9|int magic1|int magic2|unsigned int cmd|void *arg|||
|170|sys_sethostname|2|0xaa|char *name|int len|||||
|171|sys_setdomainname|2|0xab|char *name|int len|||||
|172|sys_iopl|2|0xac|unsigned int level|struct pt_regs *regs|||||
|173|sys_ioperm|3|0xad|unsigned long from|unsigned long num| int turn_on||||
|174|sys_create_module|0|0xae|||||||
|175|sys_init_module|3|0xaf|void *umod|unsigned long len|const char *uargs||||
|176|sys_delete_module|2|0xb0|const char *name_user|unsigned int flags|||||
|177|get_kernel_syms|0|0xb1|||||||
|178|query_module|0|0xb2|||||||
|179|sys_quotactl|4|0xb3|unsigned int cmd|const char *special|qid_t id|void *addr|||
|180|nfsservctl|0|0xb4|||||||
|181|getpmsg|0|0xb5|||||||
|182|putpmsg|0|0xb6|||||||
|183|afs_syscall|0|0xb7|||||||
|184|tuxcall|0|0xb8|||||||
|185|security|0|0xb9|||||||
|186|sys_gettid|0|0xba|||||||
|187|sys_readahead|3|0xbb|int fd|loff_t offset|size_t count||||
|188|sys_setxattr|5|0xbc|const char *pathname|const char *name|const void *value|size_t size|int flags||
|189|sys_lsetxattr|5|0xbd|const char *pathname|const char *name|const void *value|size_t size|int flags||
|190|sys_fsetxattr|5|0xbe|int fd|const char *name|const void *value|size_t size|int flags||
|191|sys_getxattr|4|0xbf|const char *pathname|const char *name|void *value|size_t size|||
|192|sys_lgetxattr|4|0xc0|const char *pathname|const char *name|void *value|size_t size|||
|193|sys_fgetxattr|4|0xc1|int fd|const char *name|void *value|size_t size|||
|194|sys_listxattr|3|0xc2|const char *pathname|char *list|size_t size||||
|195|sys_llistxattr|3|0xc3|const char *pathname|char *list|size_t size||||
|196|sys_flistxattr|3|0xc4|int fd|char *list|size_t size||||
|197|sys_removexattr|2|0xc5|const char *pathname|const char *name|||||
|198|sys_lremovexattr|2|0xc6|const char *pathname|const char *name|||||
|199|sys_fremovexattr|2|0xc7|int fd|const char *name|||||
|200|sys_tkill|2|0xc8|pid_t pid|int sig|||||
|201|sys_time|1|0xc9|time_t *tloc||||||
|202|sys_futex|6|0xca|uint32_t *uaddr|int op|uint32_t val|struct timespec *utime|uint32_t *uaddr2|uint32_t val3|
|203|sys_sched_setaffinity|3|0xcb|pid_t pid|unsigned int len|unsigned long *user_mask_ptr||||
|204|sys_sched_getaffinity|3|0xcc|pid_t pid|unsigned int len|unsigned long *user_mask_ptr||||
|205|sys_set_thread_area|1|0xcd|struct user_desc *u_info||||||
|206|sys_io_setup|2|0xce|unsigned nr_events|aio_context_t *ctxp|||||
|207|sys_io_destroy|1|0xcf|aio_context_t ctx||||||
|208|sys_io_getevents|4|0xd0|aio_context_t ctx_id|long min_nr|long nr|struct io_event *events|||
|209|sys_io_submit|3|0xd1|aio_context_t ctx_id|long nr|struct iocb **iocbpp||||
|210|sys_io_cancel|3|0xd2|aio_context_t ctx_id|struct iocb *iocb|struct io_event *result||||
|211|sys_get_thread_area|1|0xd3|struct user_desc *u_info||||||
|212|sys_lookup_dcookie|3|0xd4|uint64_t cookie64|long buf|long len||||
|213|sys_epoll_create|1|0xd5|int size||||||
|214|sys_epoll_ctl_old|0|0xd6|||||||
|215|sys_epoll_wait_old|0|0xd7|||||||
|216|sys_remap_file_pages|5|0xd8|unsigned long start|unsigned long size|unsigned long prot|unsigned long pgoff|unsigned long flags||
|217|sys_getdents64|3|0xd9|unsigned int fd|struct linux_dirent64 *dirent|unsigned int count||||
|218|sys_set_tid_address|1|0xda|int *tidptr||||||
|219|sys_restart_syscall|0|0xdb|||||||
|220|sys_semtimedop|4|0xdc|int semid|struct sembuf *tsops|unsigned nsops|const struct timespec *timeout|||
|221|sys_fadvise64|4|0xdd|int fd|loff_t offset|size_t len|int advice|||
|222|sys_timer_create|3|0xde|const clockid_t which_clock|struct sigevent *timer_event_spec|timer_t *created_timer_id||||
|223|sys_timer_settime|4|0xdf|timer_t timer_id|int flags|const struct itimerspec *new_setting|struct itimerspec *old_setting|||
|224|sys_timer_gettime|2|0xe0|timer_t timer_id|struct itimerspec *setting|||||
|225|sys_timer_getoverrun|1|0xe1|timer_t timer_id||||||
|226|sys_timer_delete|1|0xe2|timer_t timer_id||||||
|227|sys_clock_settime|2|0xe3|const clockid_t which_clock|const struct timespec *tp|||||
|228|sys_clock_gettime|2|0xe4|const clockid_t which_clock|struct timespec *tp|||||
|229|sys_clock_getres|2|0xe5|const clockid_t which_clock|struct timespec *tp|||||
|230|sys_clock_nanosleep|4|0xe6|const clockid_t which_clock|int flags|const struct timespec *rqtp|struct timespec *rmtp|||
|231|sys_exit_group|1|0xe7| int error_code||||||
|232|sys_epoll_wait|4|0xe8|int epfd|struct epoll_event *events|int maxevents|int timeout|||
|233|sys_epoll_ctl|4|0xe9|int epfd|int op|int fd|struct epoll_event *event|||
|234|sys_tgkill|3|0xea|pid_t tgid|pid_t pid|int sig||||
|235|sys_utimes|2|0xeb|char *filename|struct timeval *utimes|||||
|236|vserver|0|0xec|||||||
|237|sys_mbind|6|0xed|unsigned long start|unsigned long len|unsigned long mode|unsigned long *nmask|unsigned long maxnode|unsigned flags|
|238|sys_set_mempolicy|3|0xee|int mode|unsigned long *nmask|unsigned long maxnode||||
|239|sys_get_mempolicy|5|0xef|int *policy|unsigned long *nmask|unsigned long maxnode|unsigned long addr|unsigned long flags||
|240|sys_mq_open|4|0xf0|const char *u_name|int oflag|mode_t mode|struct mq_attr *u_attr|||
|241|sys_mq_unlink|1|0xf1|const char *u_name||||||
|242|sys_mq_timedsend|5|0xf2|mqd_t mqdes|const char *u_msg_ptr|size_t msg_len|unsigned int msg_prio|const struct timespec *u_abs_timeout ||
|243|sys_mq_timedreceive|5|0xf3|mqd_t mqdes|char *u_msg_ptr|size_t msg_len|unsigned int *u_msg_prio|const struct timespec *u_abs_timeout ||
|244|sys_mq_notify|2|0xf4|mqd_t mqdes|const struct sigevent *u_notification|||||
|245|sys_mq_getsetattr|2|0xf5|const struct mq_attr *u_mqstat|struct mq_attr *u_omqstat|||||
|246|sys_kexec_load|4|0xf6|unsigned long entry|unsigned long nr_segments|struct kexec_segment *segments|unsigned long flags|||
|247|sys_waitid|5|0xf7|int which|pid_t upi|struct siginfo *infop|int options|struct rusage *ru||
|248|sys_add_key|4|0xf8|const char *_type|const char *_description|const void *_payload|size_t plen|||
|249|sys_request_key|4|0xf9|const char *_type|const char *_description|const char *_callout_info|key_serial_t destringid|||
|250|sys_keyctl|5|0xfa|int option|unsigned long arg2|unsigned long arg3|unsigned long arg4|unsigned long arg5||
|251|sys_ioprio_set|3|0xfb|int which|int who| int ioprio||||
|252|sys_ioprio_get|2|0xfc|int which|int who|||||
|253|sys_inotify_init|0|0xfd|||||||
|254|sys_inotify_add_watch|3|0xfe|int fd|const char *pathname|uint32_t mask||||
|255|sys_inotify_rm_watch|2|0xff|int fd|__s32 wd|||||
|256|sys_migrate_pages|4|0x100|pid_t pid|unsigned long maxnode|const unsigned long *old_nodes|const unsigned long *new_nodes|||
|257|sys_openat|4|0x101|int dfd|const char *filename|i
|
