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Date: Mon, 9 Nov 2009 23:31:31 +0800 From: Wu Zhangjin <wuzhangjin@...il.com> To: linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org Cc: zhangfx@...ote.com, zhouqg@...il.com, Wu Zhangjin <wuzhangjin@...il.com>, Ralf Baechle <ralf@...ux-mips.org>, rostedt@...dmis.org, Frederic Weisbecker <fweisbec@...il.com>, Ingo Molnar <mingo@...e.hu>, Nicholas Mc Guire <der.herr@...r.at>, David Daney <ddaney@...iumnetworks.com>, Richard Sandiford <rdsandiford@...glemail.com>, Patrik Kluba <kpajko79@...il.com>, Thomas Gleixner <tglx@...utronix.de>, Michal Simek <monstr@...str.eu> Subject: [PATCH v7 14/17] tracing: make ftrace for MIPS work without -fno-omit-frame-pointer From: Wu Zhangjin <wuzhangjin@...il.com> 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@...il.com> --- 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 98d4690..bdfef2c 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 -- 1.6.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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