uclibc-ng/libc/sysdeps/linux/sparc/vfork.S

/* Copyright (C) 1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Jakub Jelinek <jj@ultra.linux.cz>, 1999.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/* Code taken from glibc2.2.2/sysdeps/unix/sysv/linux/sparc/vfork.S */

#include <sys/syscall.h>

#ifndef __NR_vfork
/* No vfork so use fork instead */
# define __NR_vfork __NR_fork
#endif

.text
.global	__vfork
.hidden	__vfork
.type	__vfork,%function
.align 4

__vfork:
	mov __NR_vfork, %g1
	ta	0x10
	bcc,a	9000f
	nop
	save    %sp,-96,%sp
	call HIDDEN_JUMPTARGET(__errno_location)
	nop
	st	%i0,[%o0]
	jmpl	%i7+8,%g0
	restore	%g0,-1,%o0

9000:
	sub	%o1, 1, %o1
	retl
	and	%o0, %o1, %o0

.size __vfork,.-__vfork

weak_alias(__vfork,vfork)
libc_hidden_weak(vfork)