diff options
| author | Helge Deller <deller@gmx.de> | 2009-02-09 00:43:36 +0100 |
|---|---|---|
| committer | Kyle McMartin <kyle@mcmartin.ca> | 2009-03-31 02:51:34 +0000 |
| commit | d75f054a2cf0614ff63d534ff21ca8eaab41e713 (patch) | |
| tree | e1fbea035711abf72099ebd01918f5ba3c3cf9ae /arch/parisc/kernel/entry.S | |
| parent | 803094f480aa5b7dd5187a17e6e60ff24721c212 (diff) | |
| download | blackbird-op-linux-d75f054a2cf0614ff63d534ff21ca8eaab41e713.tar.gz blackbird-op-linux-d75f054a2cf0614ff63d534ff21ca8eaab41e713.zip | |
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/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 4e9dd15e076c..ae3e70cd1e14 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -2185,6 +2185,33 @@ syscall_do_resched: ENDPROC(syscall_exit) +#ifdef CONFIG_FUNCTION_TRACER + .import ftrace_function_trampoline,code +ENTRY(_mcount) + copy %r3, %arg2 + b ftrace_function_trampoline + nop +ENDPROC(_mcount) + +ENTRY(return_to_handler) + load32 return_trampoline, %rp + copy %ret0, %arg0 + copy %ret1, %arg1 + b ftrace_return_to_handler + nop +return_trampoline: + copy %ret0, %rp + copy %r23, %ret0 + copy %r24, %ret1 + +.globl ftrace_stub +ftrace_stub: + bv %r0(%rp) + nop +ENDPROC(return_to_handler) +#endif /* CONFIG_FUNCTION_TRACER */ + + get_register: /* * get_register is used by the non access tlb miss handlers to |
