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 (file)
index 0000000..3d5bd95
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/vfork.S
@@ -0,0 +1,50 @@
+/* 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>
+
+/* 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
+       swi     __NR_vfork
+       cmn     a1, #4096
+       RETINSTR(movcc, pc, lr)
+
+       /* Check if vfork syscall is known at all.  */
+       ldr     a2, =-ENOSYS
+       teq     a1, a2
+       bne     PLTJMP(C_SYMBOL_NAME(__syscall_error))
+#endif
+
+       /* If we don't have vfork, fork is close enough.  */
+       swi     __NR_fork
+       cmn     a1, #4096
+       RETINSTR(movcc, pc, lr)
+       b       PLTJMP(C_SYMBOL_NAME(__syscall_error))
+       
+PSEUDO_END (__vfork)
+
+weak_alias (__vfork, vfork)