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authorHelge Deller <deller@gmx.de>2009-02-09 00:43:36 +0100
committerKyle McMartin <kyle@mcmartin.ca>2009-03-31 02:51:34 +0000
commitd75f054a2cf0614ff63d534ff21ca8eaab41e713 (patch)
treee1fbea035711abf72099ebd01918f5ba3c3cf9ae /arch/parisc/include
parent803094f480aa5b7dd5187a17e6e60ff24721c212 (diff)
parisc: add ftrace (function and graph tracer) functionality
This patch adds the ftrace debugging functionality to the parisc kernel. It will currently only work with 64bit kernels, because the gcc options -pg and -ffunction-sections can't be enabled at the same time and -ffunction-sections is still needed to be able to link 32bit kernels. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc/include')
-rw-r--r--arch/parisc/include/asm/ftrace.h25
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/ftrace.h b/arch/parisc/include/asm/ftrace.h
new file mode 100644
index 00000000000..2fa05dd6aee
--- /dev/null
+++ b/arch/parisc/include/asm/ftrace.h
@@ -0,0 +1,25 @@
+#ifndef _ASM_PARISC_FTRACE_H
+#define _ASM_PARISC_FTRACE_H
+
+#ifndef __ASSEMBLY__
+extern void mcount(void);
+
+/*
+ * Stack of return addresses for functions of a thread.
+ * Used in struct thread_info
+ */
+struct ftrace_ret_stack {
+ unsigned long ret;
+ unsigned long func;
+ unsigned long long calltime;
+};
+
+/*
+ * Primary handler of a function return.
+ * It relays on ftrace_return_to_handler.
+ * Defined in entry.S
+ */
+extern void return_to_handler(void);
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_PARISC_FTRACE_H */