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/*
* This file is subject to the terms and conditions of the LGPL V2.1
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2018 Kalray Inc.
*/
#include <sys/syscall.h>
#include <sysdep.h>
/* We do not want COMPAT to be enabled in our kernel, hence vfork
* is not available. Use clone to do the same job with appropriate flags */
#define _SIGNAL_H
#include <bits/signum.h> /* For SIGCHLD */
#define CLONE_VM 0x00000100
#define CLONE_VFORK 0x00004000
#define CLONE_FLAGS_FOR_VFORK (CLONE_VM|CLONE_VFORK|SIGCHLD)
ENTRY(__vfork)
make $r0 = CLONE_FLAGS_FOR_VFORK
/* Not sure if needed to zero-out other parameters but better
* be safe than sorry */
make $r1 = 0
make $r2 = 0
;;
make $r3 = 0
make $r4 = 0
;;
scall SYS_ify(clone)
;;
/* If PID < 0 then it's an error, else, simply return */
cb.dltz $r0 ? err
;;
ret
;;
L(err):
goto __syscall_error
;;
/* Never return */
errop
;;
END(__vfork)
weak_alias(__vfork,vfork)
libc_hidden_def(vfork)
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