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Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S38
1 files changed, 38 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S
new file mode 100644
index 000000000..dc7fb2ec4
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -0,0 +1,38 @@
+/* Copyright (C) 1999, 2002, 2004 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <tcb-offsets.h>
+
+/* Save the PID value. */
+#define SAVE_PID \
+ movl %gs:PID, %edx; \
+ movl %edx, %eax; \
+ negl %eax; \
+ jne 1f; \
+ movl $0x80000000, %eax; \
+1: movl %eax, %gs:PID
+
+/* Restore the old PID value in the parent. */
+#define RESTORE_PID \
+ testl %eax, %eax; \
+ je 1f; \
+ movl %edx, %gs:PID; \
+1:
+
+
+#include <libc/sysdeps/linux/i386/vfork.S>