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/* vi: set sw=4 ts=4: */
/* vfork for uClibc
*
* Copyright (C) 2000 by Lineo, inc. and Erik Andersen
* Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>
* Written by Erik Andersen <andersen@uclibc.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
* for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <asm/errno.h>
#include <sys/syscall.h>
.text
.global vfork;
.type vfork,%function
.align 4; \
vfork:
#ifdef __NR_vfork
swi __NR_vfork
cmn r0, #4096
movcc pc, lr
/* Check if vfork even exists. */
ldr r1, =-ENOSYS
teq r0, r1
bne __syscall_error
#endif
/* If we don't have vfork, use fork. */
swi __NR_fork
cmn r0, #4096
/* Syscal worked. Return to child/parent */
movcc pc, lr
__syscall_error:
/* Looks like the syscall choked -- set errno */
ldr r3, .L4
/* Calculate the - of the syscall result, in case we need it */
rsb r2, r0, $0
/* errno = -result */
str r2, [r9,r3]
/* return -1 */
mvn r0, $0
mov pc, lr
.L4: .word errno
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