[RFC v4 12/18] arm64: assembler: Add macro to annotate asm function having non standard stack-frame.
From: Raphael Gault <hidden>
Date: 2019-08-16 12:25:01
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Some functions don't have standard stack-frames but are intended this way. In order for objtool to ignore those particular cases we add a macro that enables us to annotate the cases we chose to mark as particular. Signed-off-by: Raphael Gault <redacted> --- include/linux/frame.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/linux/frame.h b/include/linux/frame.h
index 02d3ca2d9598..1e35e58ab259 100644
--- a/include/linux/frame.h
+++ b/include/linux/frame.h@@ -11,14 +11,31 @@ * * For more information, see tools/objtool/Documentation/stack-validation.txt. */ +#ifndef __ASSEMBLY__ #define STACK_FRAME_NON_STANDARD(func) \ static void __used __section(.discard.func_stack_frame_non_standard) \ *__func_stack_frame_non_standard_##func = func +#else + /* + * This macro is the arm64 assembler equivalent of the + * macro STACK_FRAME_NON_STANDARD define at + * ~/include/linux/frame.h + */ + .macro asm_stack_frame_non_standard func + .pushsection ".discard.func_stack_frame_non_standard" + .quad \func + .popsection + .endm +#endif /* __ASSEMBLY__ */ #else /* !CONFIG_STACK_VALIDATION */ +#ifndef __ASSEMBLY__ #define STACK_FRAME_NON_STANDARD(func) - +#else + .macro asm_stack_frame_non_standard func + .endm +#endif /* __ASSEMBLY__ */ #endif /* CONFIG_STACK_VALIDATION */ #endif /* _LINUX_FRAME_H */
--
2.17.1
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