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| author | Steven Rostedt <rostedt@goodmis.org> | 2009-02-11 15:01:18 -0500 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-02-23 10:48:54 +1100 |
| commit | bf528a3a9bd11b6ae39684b18c9c0678f23924fd (patch) | |
| tree | 2d9b872ebb5484c9537e355ae7d0cbc1351afd92 /arch/powerpc/include/asm/ftrace.h | |
| parent | bb7253403f7a4670a128e4c080fd8ea1bd4d5029 (diff) | |
| download | kernel_samsung_aries-bf528a3a9bd11b6ae39684b18c9c0678f23924fd.zip kernel_samsung_aries-bf528a3a9bd11b6ae39684b18c9c0678f23924fd.tar.gz kernel_samsung_aries-bf528a3a9bd11b6ae39684b18c9c0678f23924fd.tar.bz2 | |
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 <benh@kernel.crashing.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include/asm/ftrace.h')
| -rw-r--r-- | arch/powerpc/include/asm/ftrace.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index e5f2ae8..dde1296 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 |