From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 21 Jan 1999 09:46:07 +0000 (+0000)
Subject: Linux/Arm vfork implementation.
X-Git-Tag: glibc-2.16-ports-before-merge~2953
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5149854edff9d449a052b9615922b6d820328682;p=thirdparty%2Fglibc.git

Linux/Arm vfork implementation.
---

diff --git a/sysdeps/unix/sysv/linux/arm/vfork.S b/sysdeps/unix/sysv/linux/arm/vfork.S
new file mode 100644
index 00000000000..4c2f1a29820
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/vfork.S
@@ -0,0 +1,46 @@
+/* Copyright (C) 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Philip Blundell <philb@gnu.org>
+
+   The GNU C Library 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.
+
+   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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+#define _ERRNO_H	1
+#include <bits/errno.h>
+#define _SIGNAL_H
+#include <bits/signum.h>
+
+#define CLONE_VM      0x00000100 /* Set if VM shared between processes.  */
+#define CLONE_VFORK   0x00004000 /* Set if the parent wants the child to
+				     wake it up on mm_release.  */
+	
+/* 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)
+	mov	a1, $SIGCLD
+	orr	a1, a1, $(CLONE_VM | CLONE_VFORK)
+	mov	a2, $0
+	swi	SYS_ify(clone)
+	cmn	a1, $4096
+	bhs	PLTJMP(C_SYMBOL_NAME(__syscall_error))
+	RETINSTR(mov, pc, lr)
+	
+PSEUDO_END (__vfork)
+
+weak_alias (__vfork, vfork)