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997963edd9
The 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 stacktool. Rename FRAME/ENDFRAME to FRAME_BEGIN/FRAME_END for more symmetry. Also make the code more readable and improve the comments. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Bernd Petrovitsch <bernd@petrovitsch.priv.at> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Chris J Arges <chris.j.arges@canonical.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Michal Marek <mmarek@suse.cz> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Pedro Alves <palves@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/3f488a8e3bfc8ac7d4d3d350953e664e7182b044.1450442274.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
35 lines
616 B
C
35 lines
616 B
C
#ifndef _ASM_X86_FRAME_H
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#define _ASM_X86_FRAME_H
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#ifdef __ASSEMBLY__
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#include <asm/asm.h>
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/*
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* These are stack frame creation macros. They should be used by every
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* callable non-leaf asm function to make kernel stack traces more reliable.
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*/
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#ifdef CONFIG_FRAME_POINTER
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.macro FRAME_BEGIN
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push %_ASM_BP
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_ASM_MOV %_ASM_SP, %_ASM_BP
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.endm
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.macro FRAME_END
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pop %_ASM_BP
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.endm
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#define FRAME_OFFSET __ASM_SEL(4, 8)
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#else /* !CONFIG_FRAME_POINTER */
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#define FRAME_BEGIN
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#define FRAME_END
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#define FRAME_OFFSET 0
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#endif /* CONFIG_FRAME_POINTER */
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_FRAME_H */
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