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| author | Wu Zhangjin | 2009-11-20 13:34:36 +0100 |
|---|---|---|
| committer | Ralf Baechle | 2009-12-17 02:57:25 +0100 |
| commit | 046199cae714a7f9e88f5a7940b077f4515f48cb (patch) | |
| tree | 8fb3a93a80fc2f719daa0ac905b610de68cf6693 /arch/mips/kernel/mcount.S | |
| parent | MIPS: Tracing: Add dynamic function graph tracer for MIPS (diff) | |
| download | kernel-qcow2-linux-046199cae714a7f9e88f5a7940b077f4515f48cb.tar.gz kernel-qcow2-linux-046199cae714a7f9e88f5a7940b077f4515f48cb.tar.xz kernel-qcow2-linux-046199cae714a7f9e88f5a7940b077f4515f48cb.zip | |
MIPS: Tracing: Make ftrace for MIPS work without -fno-omit-frame-pointer
When remove the -fno-omit-frame-pointer, gcc will not save the frame
pointer for us, we need to save one ourselves.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nicholas Mc Guire <der.herr@hofr.at>
Cc: zhangfx@lemote.com
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/679/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/mcount.S')
| -rw-r--r-- | arch/mips/kernel/mcount.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/mcount.S b/arch/mips/kernel/mcount.S index 98d469032506..bdfef2c24f16 100644 --- a/arch/mips/kernel/mcount.S +++ b/arch/mips/kernel/mcount.S @@ -139,7 +139,15 @@ NESTED(ftrace_graph_caller, PT_SIZE, ra) #endif PTR_LA a0, PT_R1(sp) /* arg1: &AT -> a0 */ jal prepare_ftrace_return +#ifdef CONFIG_FRAME_POINTER move a2, fp /* arg3: frame pointer */ +#else +#ifdef CONFIG_64BIT + PTR_LA a2, PT_SIZE(sp) +#else + PTR_LA a2, (PT_SIZE+8)(sp) +#endif +#endif MCOUNT_RESTORE_REGS RETURN_BACK |