From bf528a3a9bd11b6ae39684b18c9c0678f23924fd Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 11 Feb 2009 15:01:18 -0500 Subject: powerpc32, ftrace: save and restore mcount regs with macro Impact: clean up Use a macro to save and restore the registers for PowerPC32, since that code is duplicated. This is similar to the work done by Cyrill Gorcunov for the mcount code in x86_64. Acked-by: Benjamin Herrenschmidt Signed-off-by: Steven Rostedt Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/ftrace.h | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include/asm/ftrace.h') diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index e5f2ae8362f7..dde1296b8b41 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -5,7 +5,44 @@ #define MCOUNT_ADDR ((long)(_mcount)) #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ -#ifndef __ASSEMBLY__ +#ifdef __ASSEMBLY__ + +/* Based off of objdump optput from glibc */ + +#define MCOUNT_SAVE_FRAME \ + stwu r1,-48(r1); \ + stw r3, 12(r1); \ + stw r4, 16(r1); \ + stw r5, 20(r1); \ + stw r6, 24(r1); \ + mflr r3; \ + lwz r4, 52(r1); \ + mfcr r5; \ + stw r7, 28(r1); \ + stw r8, 32(r1); \ + stw r9, 36(r1); \ + stw r10,40(r1); \ + stw r3, 44(r1); \ + stw r5, 8(r1) + +#define MCOUNT_RESTORE_FRAME \ + lwz r6, 8(r1); \ + lwz r0, 44(r1); \ + lwz r3, 12(r1); \ + mtctr r0; \ + lwz r4, 16(r1); \ + mtcr r6; \ + lwz r5, 20(r1); \ + lwz r6, 24(r1); \ + lwz r0, 52(r1); \ + lwz r7, 28(r1); \ + lwz r8, 32(r1); \ + mtlr r0; \ + lwz r9, 36(r1); \ + lwz r10,40(r1); \ + addi r1, r1, 48 + +#else /* !__ASSEMBLY__ */ extern void _mcount(void); #ifdef CONFIG_DYNAMIC_FTRACE -- cgit v1.2.1