[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / powerpc / powerpc32 / vfork.S

/* Copyright (C) 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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, see
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>
#define _ERRNO_H	1
#include <bits/errno.h>
#include <kernel-features.h>

/* Clone the calling process, but without copying the whole address space.
   The calling process is suspended until the new process exits or is
   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
   and the process ID of the new process to the old process.  */

ENTRY (__vfork)

#ifdef __NR_vfork

	DO_CALL (SYS_ify (vfork))

# ifdef __ASSUME_VFORK_SYSCALL
	PSEUDO_RET
# else
	bnslr+
	/* Check if vfork syscall is known at all.  */
	cmpwi	r3,ENOSYS
	bne-	.Lsyscall_error

# endif
#endif

#ifndef __ASSUME_VFORK_SYSCALL
	/* If we don't have vfork, fork is close enough.  */

	DO_CALL (SYS_ify (fork))
	bnslr+

.Lsyscall_error:
	b	__syscall_error@local
#endif

PSEUDO_END (__vfork)
libc_hidden_def (__vfork)

weak_alias (__vfork, vfork)
Commit	Line	Data
b398ae3c UD	1	/* Copyright (C) 2003 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
59ba27a6 PE	15	License along with the GNU C Library; if not, see
59ba27a6 PE	16	<http://www.gnu.org/licenses/>. */
b398ae3c UD	17
	18	#include <sysdep.h>
	19	#define _ERRNO_H 1
	20	#include <bits/errno.h>
	21	#include <kernel-features.h>
	22
	23	/* Clone the calling process, but without copying the whole address space.
	24	The calling process is suspended until the new process exits or is
	25	replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
	26	and the process ID of the new process to the old process. */
	27
	28	ENTRY (__vfork)
	29
	30	#ifdef __NR_vfork
	31
	32	DO_CALL (SYS_ify (vfork))
	33
	34	# ifdef __ASSUME_VFORK_SYSCALL
	35	PSEUDO_RET
	36	# else
	37	bnslr+
	38	/* Check if vfork syscall is known at all. */
	39	cmpwi r3,ENOSYS
05856976	40	bne- .Lsyscall_error
b398ae3c UD	41
	42	# endif
	43	#endif
	44
	45	#ifndef __ASSUME_VFORK_SYSCALL
	46	/* If we don't have vfork, fork is close enough. */
	47
	48	DO_CALL (SYS_ify (fork))
05856976 UD	49	bnslr+
	50
	51	.Lsyscall_error:
b0e196a4	52	b __syscall_error@local
b398ae3c UD	53	#endif
	54
	55	PSEUDO_END (__vfork)
	56	libc_hidden_def (__vfork)
	57
	58	weak_alias (__vfork, vfork)