1/* Copyright (C) 2000-2022 Free Software Foundation, Inc.
2   This file is part of the GNU C Library.
3
4   The GNU C Library is free software; you can redistribute it and/or
5   modify it under the terms of the GNU Lesser General Public
6   License as published by the Free Software Foundation; either
7   version 2.1 of the License, or (at your option) any later version.
8
9   The GNU C Library is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12   Lesser General Public License for more details.
13
14   You should have received a copy of the GNU Lesser General Public
15   License along with the GNU C Library; if not, see
16   <https://www.gnu.org/licenses/>.  */
17
18
19#include <sysdep.h>
20#define _SIGNAL_H
21#include <bits/signum-arch.h>
22#include <tcb-offsets.h>
23
24/* The following are defined in linux/sched.h, which unfortunately	*/
25/* is not safe for inclusion in an assembly file.			*/
26#define CLONE_VM        0x00000100      /* set if VM shared between processes */
27#define CLONE_VFORK     0x00004000      /* set if the parent wants the child to wake it up on mm_release */
28
29/* pid_t vfork(void); */
30/* Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0)	*/
31
32ENTRY (__libc_vfork)
33	.prologue	// work around a GAS bug which triggers if
34	.body		// first .prologue is not at the beginning of proc.
35	alloc r2=ar.pfs,0,0,2,0
36	mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
37	mov out1=0		/* Standard sp value.			*/
38	;;
39	DO_CALL (SYS_ify (clone))
40	cmp.eq p6,p0=0,r8
41(p6)	br.cond.dptk 1f
421:
43	cmp.eq p6,p0=-1,r10
44(p6)	br.cond.spnt.few __syscall_error
45	ret
46PSEUDO_END (__libc_vfork)
47
48strong_alias (__libc_vfork, __vfork)
49libc_hidden_def (__vfork)
50weak_alias (__vfork, vfork)
51