1 files changed, 59 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S
new file mode 100644
index 000000000..46eb76dd6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S
@@ -0,0 +1,59 @@
+/* Copyright (C) 2013 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 <tls.h>
+
+/*
+  Save the PID value, save 0x80000000 if PID was 0.
+  Registers a2 and a3 are available; ar should return the PID and as threadptr
+ */
+
+#define SAVE_PID(pid,tp,ar,as)						\
+	rur	tp, threadptr;						\
+	movi	ar, TLS_PRE_TCB_SIZE;					\
+	sub	tp, tp, ar;						\
+	l32i	pid, tp, PID;						\
+	neg	ar, pid;						\
+	movi	as, 0x80000000;						\
+	moveqz	ar, as, ar;						\
+	s32i	ar, tp, PID;						\
+
+/*
+  Restore the PID value, restore to 0 if saved value was 0x80000000
+  Return value from the syscall is in a2.
+ */
+#define RESTORE_PID(pid,tp,res)						\
+	beqz	res, 1f;						\
+	s32i	pid, tp, PID;						\
+1:
+
+/*
+  Special version for call12, where we don't have enough registers
+  available to preserve the original PID.
+ */
+#define RESTORE_PID12(ar, as, at)					\
+	rur	as, threadptr;						\
+	movi	ar, TLS_PRE_TCB_SIZE;					\
+	sub	as, as, ar;						\
+	l32i	ar, as, PID;						\
+	movi	at, 0x80000000;						\
+	sub	at, at, ar;						\
+	neg	ar, ar;							\
+	moveqz	ar, at, at;						\
+	s32i	ar, as, PID;
+
+#include <libc/sysdeps/linux/xtensa/vfork.S>