1 files changed, 94 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S b/libpthread/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S
new file mode 100644
index 000000000..83ad9f3b5
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -0,0 +1,94 @@
+/* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@gnu.org>.
+
+   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-cancel.h>
+#define _ERRNO_H	1
+#include <bits/errno.h>
+#include <bits/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
+
+# ifdef SHARED
+#  if !defined HAVE_HIDDEN || !defined __UCLIBC_HAS_TLS__
+	SETUP_PIC_REG (cx)
+#  else
+	call	__i686.get_pc_thunk.cx
+#  endif
+	addl	$_GLOBAL_OFFSET_TABLE_, %ecx
+	cmpl	$0, __libc_pthread_functions@GOTOFF(%ecx)
+# else
+	.weak	pthread_create
+	movl	$pthread_create, %eax
+	testl	%eax, %eax
+# endif
+	jne	HIDDEN_JUMPTARGET (fork)
+
+	/* Pop the return PC value into ECX.  */
+	popl	%ecx
+
+	/* Stuff the syscall number in EAX and enter into the kernel.  */
+	movl	$SYS_ify (vfork), %eax
+	int	$0x80
+
+	/* Jump to the return PC.  Don't jump directly since this
+	   disturbs the branch target cache.  Instead push the return
+	   address back on the stack.  */
+	pushl	%ecx
+
+	cmpl	$-4095, %eax
+	/* Branch forward if it failed.  */
+# ifdef __ASSUME_VFORK_SYSCALL
+	jae	SYSCALL_ERROR_LABEL
+.Lpseudo_end:
+# else
+	jae	.Lerror
+# endif
+
+	ret
+
+# ifndef __ASSUME_VFORK_SYSCALL
+.Lerror:
+	/* Check if vfork syscall is known at all.  */
+	cmpl	$-ENOSYS, %eax
+	jne	SYSCALL_ERROR_LABEL
+# endif
+#endif
+
+#ifndef __ASSUME_VFORK_SYSCALL
+	/* If we don't have vfork, fork is close enough.  */
+
+	movl	$SYS_ify (fork), %eax
+	int	$0x80
+	cmpl	$-4095, %eax
+	jae	SYSCALL_ERROR_LABEL
+.Lpseudo_end:
+	ret
+#elif !defined __NR_vfork
+# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
+#endif
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)