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Diffstat (limited to 'libc/sysdeps/linux/nds32/bsd-setjmp.S')
-rw-r--r--libc/sysdeps/linux/nds32/bsd-setjmp.S34
1 files changed, 34 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/nds32/bsd-setjmp.S b/libc/sysdeps/linux/nds32/bsd-setjmp.S
new file mode 100644
index 000000000..b00e62da8
--- /dev/null
+++ b/libc/sysdeps/linux/nds32/bsd-setjmp.S
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2016 Andes Technology, Inc.
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+/* This just does a tail-call to `__sigsetjmp (ARG, 1)'.
+ We cannot do it in C because it must be a tail-call, so frame-unwinding
+ in setjmp doesn't clobber the state restored by longjmp. */
+
+#include <sysdep.h>
+
+ENTRY(setjmp)
+ move $r1, #1
+
+/* Make a tail call to __sigsetjmp. */
+#ifdef PIC
+ /* Initialize $r2 as $gp value. */
+ sethi $r2, hi20(_GLOBAL_OFFSET_TABLE_-8)
+ ori $r2, $r2, lo12(_GLOBAL_OFFSET_TABLE_-4)
+ mfusr $r15, $pc
+ add $r2, $r15, $r2
+
+ ! la $r3, __sigsetjmp@PLT
+ sethi $r3, hi20(__sigsetjmp@PLT)
+ ori $r3, $r3, lo12(__sigsetjmp@PLT)
+ add $r3, $r3, $r2
+
+ jr $r3
+#else /* NOT PIC */
+ la $r15, C_SYMBOL_NAME(__sigsetjmp)
+ jr $r15
+#endif
+
+END (setjmp)