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authorMax Filippov <jcmvbkbc@gmail.com>2013-04-15 09:20:48 +0400
committerChris Zankel <chris@zankel.net>2013-05-09 01:07:10 -0700
commit3e4196a5cc9cff50900f3dc8acc3d41e5963fd50 (patch)
tree149403b0517e402fbf29ce9aac65a49d1119234e /arch/xtensa/include
parent4e96274e2b7a7463de6849c0411d876182ee8889 (diff)
xtensa: add stacktrace support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/include')
-rw-r--r--arch/xtensa/include/asm/stacktrace.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/stacktrace.h b/arch/xtensa/include/asm/stacktrace.h
new file mode 100644
index 000000000000..6a05fcb0a20d
--- /dev/null
+++ b/arch/xtensa/include/asm/stacktrace.h
@@ -0,0 +1,36 @@
+/*
+ * arch/xtensa/include/asm/stacktrace.h
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2013 Tensilica Inc.
+ */
+#ifndef _XTENSA_STACKTRACE_H
+#define _XTENSA_STACKTRACE_H
+
+#include <linux/sched.h>
+
+struct stackframe {
+ unsigned long pc;
+ unsigned long sp;
+};
+
+static __always_inline unsigned long *stack_pointer(struct task_struct *task)
+{
+ unsigned long *sp;
+
+ if (!task || task == current)
+ __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
+ else
+ sp = (unsigned long *)task->thread.sp;
+
+ return sp;
+}
+
+void walk_stackframe(unsigned long *sp,
+ int (*fn)(struct stackframe *frame, void *data),
+ void *data);
+
+#endif /* _XTENSA_STACKTRACE_H */