Syscalls Reference

This document provides a complete reference of all syscalls implemented in the Kyronix kernel. It is the child of Reference.

Overview

The kernel implements approximately 140 Linux x86_64 ABI-compatible syscalls plus custom jail syscalls.

Syscall Table

#	Name	#	Name
0	read	1	write
2	open	3	close
4	stat	5	fstat
6	lstat	7	poll
8	lseek	9	mmap
10	mprotect	11	munmap
12	brk	13	rt_sigaction
14	rt_sigprocmask	15	rt_sigreturn
16	ioctl	17	pread64
18	pwrite64	19	readv
20	writev	21	access
22	pipe	23	select
25	mremap	29	shmget
30	shmat	31	shmctl
32	dup	33	dup2
34	pause	35	nanosleep
36	getitimer	37	alarm
38	setitimer	39	getpid
40	sendfile	41	socket
42	connect	43	accept
44	sendto	45	recvfrom
46	sendmsg	47	recvmsg
48	shutdown	49	bind
50	listen	51	getsockname
52	getpeername	53	socketpair
54	setsockopt	55	getsockopt
56	clone	57	fork
58	vfork	59	execve
60	exit	61	wait4
62	kill	63	uname
67	shmdt	72	fcntl
76	truncate	77	ftruncate
78	getdents64	79	getcwd
80	chdir	82	rename
83	mkdir	84	rmdir
86	link	87	unlink
88	symlink	89	readlink
90	chmod	95	umask
96	gettimeofday	97	getrlimit
101	ptrace	102	getuid
104	getgid	105	setuid
106	setgid	107	geteuid
108	getegid	109	setpgid
112	setsid	117	setresuid
119	setresgid	137	statfs
158	arch_prctl	169	reboot
186	gettid	201	time
202	futex	213	epoll_create
218	set_tid_address	228	clock_gettime
229	clock_getres	230	clock_nanosleep
231	exit_group	232	epoll_wait
233	epoll_ctl	234	tgkill
257	openat	262	newfstatat
263	unlinkat	270	pselect6
271	ppoll	280	openat2
283	timerfd_create	284	eventfd
288	accept4	290	eventfd2
291	epoll_create1	292	dup3
293	pipe2	295	preadv
296	pwritev	302	prlimit64
318	getrandom	319	memfd_create
326	copy_file_range	332	statx
334	close_range

Custom Jail Syscalls

#	Name
500	jail_create
501	jail_attach
502	jail_get
503	jail_list
504	jail_remove
505	jail_self
506	jail_set_auto

Last reviewed: 2026-07-22