The FRAME/ENDFRAME asm macros for setting up and restoring the frame pointer aren't currently being used. However, they will be needed soon to help asm functions to comply with stackvalidate.
Make the code more readable and improve the comments. Signed-off-by: Josh Poimboeuf <jpoim...@redhat.com> --- arch/x86/include/asm/frame.h | 37 ++++++++++++++++++++----------------- 1 file changed, 20 insertions(+), 17 deletions(-) diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h index 793179c..a9438cd 100644 --- a/arch/x86/include/asm/frame.h +++ b/arch/x86/include/asm/frame.h @@ -1,23 +1,26 @@ +#ifndef _ASM_X86_FRAME_H +#define _ASM_X86_FRAME_H + #ifdef __ASSEMBLY__ #include <asm/asm.h> -/* The annotation hides the frame from the unwinder and makes it look - like a ordinary ebp save/restore. This avoids some special cases for - frame pointer later */ -#ifdef CONFIG_FRAME_POINTER - .macro FRAME - __ASM_SIZE(push,) %__ASM_REG(bp) - __ASM_SIZE(mov) %__ASM_REG(sp), %__ASM_REG(bp) - .endm - .macro ENDFRAME - __ASM_SIZE(pop,) %__ASM_REG(bp) - .endm -#else - .macro FRAME - .endm - .macro ENDFRAME - .endm -#endif +/* + * These are stack frame creation macros. They should be used by every + * callable non-leaf asm function to make kernel stack traces more reliable. + */ +.macro FRAME + .if CONFIG_FRAME_POINTER + push %_ASM_BP + _ASM_MOV %_ASM_SP, %_ASM_BP + .endif +.endm + +.macro ENDFRAME + .if CONFIG_FRAME_POINTER + pop %_ASM_BP + .endif +.endm #endif /* __ASSEMBLY__ */ +#endif /* _ASM_X86_FRAME_H */ -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
