sys/openbsd/ipc.txt

# Copyright 2017 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

include <sys/types.h>
include <sys/fcntl.h>
include <sys/stat.h>
include <sys/ipc.h>
include <sys/shm.h>
include <sys/msg.h>
include <sys/sem.h>

resource ipc[int32]: 0, 0xffffffffffffffff

# TODO: describe ipc syscall

define SYS___semctl50	295

resource ipc_msq[ipc]
msgget(key proc[2039379027, 4], flags flags[msgget_flags]) ipc_msq
msgget$private(key const[IPC_PRIVATE], flags flags[msgget_flags]) ipc_msq
msgsnd(msqid ipc_msq, msgp ptr[in, msgbuf], sz len[msgp], flags flags[msgsnd_flags])
msgrcv(msqid ipc_msq, msgp ptr[out, msgbuf], sz len[msgp], typ flags[msgbuf_type], flags flags[msgrcv_flags])
msgctl$IPC_STAT(msqid ipc_msq, cmd const[IPC_STAT], buf buffer[out])
msgctl$IPC_SET(msqid ipc_msq, cmd const[IPC_SET], buf ptr[in, msqid_ds])
msgctl$IPC_RMID(msqid ipc_msq, cmd const[IPC_RMID])

resource ipc_sem[ipc]
semget(key proc[2039359027, 4], nsems flags[sem_sem_id], flags flags[semget_flags]) ipc_sem
semget$private(key const[IPC_PRIVATE], nsems flags[sem_sem_id], flags flags[semget_flags]) ipc_sem
semop(semid ipc_sem, ops ptr[in, array[sembuf]], nops len[ops])
semctl$IPC_STAT(semid ipc_sem, semnum const[0], cmd const[IPC_STAT], arg buffer[out])
semctl$IPC_SET(semid ipc_sem, semnum const[0], cmd const[IPC_SET], arg ptr[in, semid_ds])
semctl$IPC_RMID(semid ipc_sem, semnum const[0], cmd const[IPC_RMID])
semctl$GETALL(semid ipc_sem, semnum const[0], cmd const[GETALL], arg buffer[out])
semctl$GETNCNT(semid ipc_sem, semnum flags[sem_sem_id], cmd const[GETNCNT], arg buffer[out])
semctl$GETPID(semid ipc_sem, semnum flags[sem_sem_id], cmd const[GETPID], arg buffer[out])
semctl$GETVAL(semid ipc_sem, semnum flags[sem_sem_id], cmd const[GETVAL], arg buffer[out])
semctl$GETZCNT(semid ipc_sem, semnum flags[sem_sem_id], cmd const[GETZCNT], arg buffer[out])
semctl$SETALL(semid ipc_sem, semnum const[0], cmd const[SETALL], arg ptr[in, array[int16]])
semctl$SETVAL(semid ipc_sem, semnum flags[sem_sem_id], cmd const[SETVAL], arg ptr[in, int32])

resource ipc_shm[ipc]
resource shmaddr[intptr]: 0
# The unused arg is unused by syscall (does not exist at all),
# but it helps to generate sane size values.
shmget(key proc[2039339027, 4], size len[unused], flags flags[shmget_flags], unused vma) ipc_shm
shmget$private(key const[IPC_PRIVATE], size len[unused], flags flags[shmget_flags], unused vma) ipc_shm
shmat(shmid ipc_shm, addr vma, flags flags[shmat_flags]) shmaddr
shmctl$IPC_STAT(shmid ipc_shm, cmd const[IPC_STAT], buf buffer[out])
shmctl$IPC_SET(shmid ipc_shm, cmd const[IPC_SET], buf ptr[in, shmid_ds])
shmctl$IPC_RMID(shmid ipc_shm, cmd const[IPC_RMID])
shmctl$SHM_LOCK(shmid ipc_shm, cmd const[SHM_LOCK])
shmctl$SHM_UNLOCK(shmid ipc_shm, cmd const[SHM_UNLOCK])
shmdt(addr shmaddr)

msgget_flags = IPC_CREAT, IPC_EXCL, S_IRUSR, S_IWUSR, S_IXUSR, S_IRGRP, S_IWGRP, S_IXGRP, S_IROTH, S_IWOTH, S_IXOTH
msgbuf_type = 0, 1, 2, 3
msgsnd_flags = IPC_NOWAIT
msgrcv_flags = IPC_NOWAIT, MSG_NOERROR
semget_flags = IPC_CREAT, IPC_EXCL, S_IRUSR, S_IWUSR, S_IXUSR, S_IRGRP, S_IWGRP, S_IXGRP, S_IROTH, S_IWOTH, S_IXOTH
semop_flags = IPC_NOWAIT, SEM_UNDO
sem_sem_id = 0, 1, 2, 3, 4
shmget_flags = IPC_CREAT, IPC_EXCL, S_IRUSR, S_IWUSR, S_IXUSR, S_IRGRP, S_IWGRP, S_IXGRP, S_IROTH, S_IWOTH, S_IXOTH
shmat_flags = SHM_RND, SHM_RDONLY

ipc_perm {
	key	int32
	uid	uid
	gid	gid
	cuid	uid
	cgid	gid
	mode	flags[open_mode, int32]
	seq	int16
	pad0	const[0, int16]
	pad1	const[0, intptr]
	pad2	const[0, intptr]
}

msqid_ds {
	perm	ipc_perm
	qnum	intptr
	qbytes	intptr
	lspid	pid
	lrpid	pid
	stime	intptr
	rtime	intptr
	ctime	intptr
	cbytes	intptr
	pad0	const[0, intptr]
	pad1	const[0, intptr]
}

shmid_ds {
	perm	ipc_perm
	segsz	int32
	nattch	int16
	cpid	pid
	lpid	pid
	atime	intptr
	dtime	intptr
	ctime	intptr
	unused0	const[0, int16]
	unused1	const[0, intptr]
	unused2	const[0, intptr]
}

semid_ds {
	perm	ipc_perm
	otime	intptr
	ctime	intptr
	nsems	intptr
	pad0	const[0, intptr]
	pad1	const[0, intptr]
}

sembuf {
	num	flags[sem_sem_id, int16]
	op	int16
	flg	flags[semop_flags, int16]
}

msgbuf {
	typ	flags[msgbuf_type, intptr]
	data	array[int8]
} [packed]