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@@ -1 +1,33 @@
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-/* empty */
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+/*
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+ * arch/xtensa/include/asm/ftrace.h
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+ *
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file "COPYING" in the main directory of this archive
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+ * for more details.
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+ *
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+ * Copyright (C) 2013 Tensilica Inc.
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+ */
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+#ifndef _XTENSA_FTRACE_H
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+#define _XTENSA_FTRACE_H
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+
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+#include <asm/processor.h>
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+
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+#define HAVE_ARCH_CALLER_ADDR
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+#define CALLER_ADDR0 ({ unsigned long a0, a1; \
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+ __asm__ __volatile__ ( \
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+ "mov %0, a0\n" \
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+ "mov %1, a1\n" \
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+ : "=r"(a0), "=r"(a1) : : ); \
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+ MAKE_PC_FROM_RA(a0, a1); })
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+#ifdef CONFIG_FRAME_POINTER
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+extern unsigned long return_address(unsigned level);
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+#define CALLER_ADDR1 return_address(1)
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+#define CALLER_ADDR2 return_address(2)
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+#define CALLER_ADDR3 return_address(3)
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+#else
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+#define CALLER_ADDR1 (0)
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+#define CALLER_ADDR2 (0)
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+#define CALLER_ADDR3 (0)
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+#endif
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+
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+#endif /* _XTENSA_FTRACE_H */
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