lutfisk.net - syscall table

# Linux system call table for AMD64

Be aware that this API can change, and depending on LibC is usually preferred, however much it sucks.

Includes the first 173 out of 335 calls as of 2024-05-02.

Return values are passed in RAX, with values above 0xFFFFFFFFFFFFF000 (unsigned negative 4096) being error codes equivalent to those of LibC's errno after a sign flip by a negq instruction.

Syscall	RAX	RDI	RSI	RDX	R10	R8	R9
read	0	FD	BUF*	SIZE
write	1	FD	BUF*	SIZE
open	2	PATH*	FLAGS	MODE
close	3	FD
stat	4	PATH*	STATBUF*
fstat	5	FD	STATBUF*
lstat	6	PATH*	STATBUF*
poll	7	UFDS	COUNT	TIMEOUT
lseek	8	FD	OFFSET	ORIGIN
mmap	9	ADDR*	SIZE	PERMIT	FLAGS	FD	OFFSET
mprotect	10	ADDR*	SIZE	PERMIT
munmap	11	ADDR*	SIZE
brk	12	SIZE
rt_sigaction	13	SIG	ACT*	OACT*	COUNT
rt_sigprocmask	14	HOW	SET*	OSET*	COUNT
rt_sigreturn	15	UNUSED
ioctl	16	FD	CMD	ARG
pread64	17	FD	BUF*	SIZE	OFFSET
pwrite64	18	FD	BUF*	SIZE	OFFSET
readv	19	FD	IOVEC*	COUNT
writev	20	FD	IOVEC*	COUNT
access	21	PATH*	MODE
pipe	22	FD*	MODE
select	23	COUNT	IFDSET*	OFDSET*	EXPFDSET*	TIMEVAL*
sched_yield	24
mremap	25	ADDR*	SIZE	NEWSIZE	FLAGS	NEWADDR*
msync	26	ADDR*	SIZE	FLAGS
mincore	27	ADDR*	SIZE	CHARVEC*
madvise	28	ADDR*	SIZE	BEHAVIOUR
shmget	29	KEY	SIZE	FLAGS
shmat	30	ID	ADDR*	FLAGS
shmctl	31	ID	CMD	BUF*
dup	32	FD
dup2	33	FD	NEWFD
pause	34
nanosleep	35	RQTP*	RMTP*
getitimer	36	WHICH	VAL*
alarm	37	SEC
setitimer	38	WHICH	VAL*	OVAL*
getpid	39
sendfile	40	OFD	IFD	OFFSET*	SIZE
socket	41	FAMILY	TYPE	PROTO
connect	42	FD	SOCKADDR*	ADDRLEN
accept	43	FD	SOCKADDR*	ADDRLEN*
sendto	44	FD	BUF*	SIZE	FLAGS	SOCKADDR*	ADDRLEN
recvfrom	45	FD	BUF*	SIZE	FLAGS	SOCKADDR*	ADDRLEN
sendmsg	46	FD	MSG*	FLAGS
recvmsg	47	FD	MSG*	FLAGS
shutdown	48	FD	HOW
bind	49	FD	SOCKADDR*	ADDRLEN
listen	50	FD	BACKLOG
getsockname	51	FD	SOCKADDR*	ADDRLEN
getpeername	52	FD	SOCKADDR*	ADDRLEN
socketpair	53	FAMILY	TYPE	PROTO	FD*
setsockopt	54	FD	LEVEL	OPT	VAL*	SIZE
getsockopt	55	FD	LEVEL	OPT	VAL*	SIZE*
clone	56	FLAGS	NEWSP	PARENTID*	CHILDID*	TID
fork	57
vfork	58
execve	59	PATH*	ARGV**	ENV**
exit	60	CODE
wait4	61	PID	STATADDR*	OPT	RUSAGE*
kill	62	PID	SIG
uname	63	NAME*
semget	64	KEY	COUNT	FLAGS
semop	65	ID	SEMOPS*	COUNT
semctl	66	ID	COUNT	CMD	ARG
shmdt	67	ADDR*
msgget	68	KEY	FLAGS
msgsnd	69	ID	BUF*	SIZE	FLAGS
msgrcv	70	ID	BUF*	SIZE	TYPE	FLAGS
msgctl	71	ID	CMD	BUF*
fcntl	72	FD	CMD	ARG
flock	73	FD	CMD
fsync	74	FD
fdatasync	75	FD
truncate	76	PATH*	SIZE
ftruncate	77	FD	SIZE
getdents	78	FD	DIRENT*	COUNT
getcwd	79	BUF*	SIZE
chdir	80	PATH*
fchdir	81	FD
rename	82	PATH*	NEWPATH*
mkdir	83	PATH*	MODE
rmdir	84	PATH*
creat	85	PATH*	MODE
link	86	PATH*	NEWPATH*
unlink	87	PATH*
symlink	88	PATH*	NEWPATH*
readlink	89	PATH*	BUF*	SIZE
chmod	90	PATH*	MODE
fchmod	91	FD	MODE
chown	92	PATH*	USRID	GRPID
fchmod	93	FD	USRID	GRPID
lchmod	94	PATH*	USRID	GRPID
umask	95	MASK
gettimeofday	96	TIMEVAL*	TIMEZONE*
getrlimit	97	RESOURCE	RLIMIT*
getrusage	98	WHO	RUSAGE*
sysinfo	99	SYSINFO*
times	100	TMS*
ptrace	101	REQUEST	PID	ADDR*	DATA*
getuid	102
syslog	103	TYPE	BUF*	SIZE
getgid	104
setuid	105	USRID
setgid	106	GRPID
geteuid	107
getegid	108
setpgid	109	PID	GRPID
getppid	110
getpgrp	111
setsid	112
setreuid	113	RUSRID	EUSRID
setregid	114	RGRPID	EGRPID
getgroups	115	COUNT	GRPID*
setgroups	116	COUNT	GRPID*
setresuid	117	RUSRID*	EUSRID*	SUSRID*
getresuid	118	RUSRID*	EUSRID*	SUSRID*
setresgid	119	RGRPID	EGRPID	SGRPID
getresgid	120	RGRPID*	EGRPID*	SGRPID*
getpgid	121	PID
setfsuid	122	USRID
setfsgid	123	GRPID
getsid	124	PID
capget	125	CAPHEADER	CAPDATAPTR
capset	126	CAPHEADER	CAPDATAPTR
rt_sigpending	127	SIGSET*	COUNT
rt_sigtimedwait	128	SIGSET*	SIGINFO*	TIMESPEC*	COUNT
rt_sigqueueinfo	129	PID	SIG	SIGINFO*
rt_sigsuspend	130	SIGSET*	COUNT
sigaltstack	131	STACK*	OSTACK*
utime	132	PATH*	UTIMBUF*
mknod	133	PATH*	MODE	DEV
uselib	134	--DEPRECATED--
personality	135	PERSONALITY
ustat	136	DEV	USTATBUF*
statfs	137	PATH*	STATFSBUF*
fstatfs	138	FD	STATFSBUF*
sysfs	139	OPT	ARG1	ARG2
getpriority	140	WHICH	WHO
setpriority	141	WHICH	WHO	NICENESS
sched_setparam	142	PID	SCHEDPARAM*
sched_getparam	143	PID	SCHEDPARAM*
sched_setscheduler	144	PID	POLICY	SCHEDPARAM*
sched_getscheduler	145	PID
sched_get_priority_max	146	POLICY
sched_get_priority_min	147	POLICY
sched_rr_get_interval	148	PID	TIMESPEC*
mlock	149	ADDR*	SIZE
munlock	150	ADDR*	SIZE
mlockall	151	FLAGS
munlockall	152
vhangup	153
modify_ldt	154	FUNC	PTR*	BYTES
pivot_root	155	PATH*	OLDPATH*
_sysctl	156	ARGS*
prctl	157	OPT	ARG2	ARG3	ARG4		ARG5
arch_prctl	158	TASK*	CODE	ADDR*
adjtimex	159	TIMEX*
setrlimit	160	RESOURCE	RLIMIT*
chroot	161	PATH*
sync	162
acct	163	PATH*
settimeofday	164	TIMEVAL*	TIMEZONE*
mount	165	DEVPATH*	DIRPATH*	TYPE*	FLAGS	DATA*
umount2	166	PATH*	FLAGS
swapon	167	PATH*	FLAGS
swapoff	168	PATH*
reboot	169	MAGIC1	MAGIC2	CMD	ARG*
sethostname	170	NAME*	SIZE
setdomainname	171	NAME*	SIZE
iopl	172	LEVEL	PTREGS*
ioperm	173	FROM	COUNT	TURN_ON