Add the __cerror asm bits for per-thread errno support for powerpc.

ok guenther@

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/librthread/arch/powerpc/cerror.S b/lib/librthread/arch/powerpc/cerror.S
new file mode 100644
index 00000000000..d34ea9d6398
--- /dev/null
+++ b/lib/librthread/arch/powerpc/cerror.S
@@ -0,0 +1,41 @@
+/* $OpenBSD: cerror.S,v 1.1 2011/11/09 15:36:23 kettenis Exp $ */
+
+/*
+ * Copyright (c) 1996 Dale Rahn
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "SYS.h"
+#include <machine/asm.h>
+
+#define ERRNOPTR_OFFSET	16
+
+	.text
+ASENTRY(__cerror)
+	lwz  5, 4(2)
+	lwz  5, ERRNOPTR_OFFSET(5)
+
+	stw 0, 0(5)
+	addi 3, 0, -1
+	addi 4, 0, -1
+	blr