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Subject[PATCH v12 03/21] x86/asm: Add C versions of frame pointer macros
Date
Add C versions of the frame pointer macros which can be used to create a
stack frame in inline assembly.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
---
arch/x86/include/asm/frame.h | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h
index 8a6cd26..9a30ec7 100644
--- a/arch/x86/include/asm/frame.h
+++ b/arch/x86/include/asm/frame.h
@@ -1,10 +1,10 @@
#ifndef _ASM_X86_FRAME_H
#define _ASM_X86_FRAME_H

-#ifdef __ASSEMBLY__
-
#include <asm/asm.h>

+#ifdef __ASSEMBLY__
+
/*
* These are stack frame creation macros. They should be used by every
* callable non-leaf asm function to make kernel stack traces more reliable.
@@ -22,5 +22,21 @@
#endif
.endm

+#else /* !__ASSEMBLY__ */
+
+#ifdef CONFIG_FRAME_POINTER
+
+#define FRAME_BEGIN \
+ "push %" _ASM_BP "\n" \
+ _ASM_MOV "%" _ASM_SP ", %" _ASM_BP "\n"
+
+#define FRAME_END "pop %" _ASM_BP "\n"
+
+#else /* !CONFIG_FRAME_POINTER */
+
+#define FRAME_BEGIN ""
+#define FRAME_END ""
+
+#endif /* CONFIG_FRAME_POINTER */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_FRAME_H */
--
2.4.3


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