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Josh Poimboeuf
9a99417acb
Add a new macro, STACK_FRAME_NON_STANDARD(), which is used to denote a function which does something unusual related to its stack frame. Use of the macro prevents objtool from emitting a false positive warning. Signed-off-by: Josh Poimboeuf <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Bernd Petrovitsch <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Chris J Arges <[email protected]> Cc: Jiri Slaby <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Michal Marek <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Pedro Alves <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/34487a17b23dba43c50941599d47054a9584b219.1456719558.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <[email protected]>
24 lines
767 B
C
24 lines
767 B
C
#ifndef _LINUX_FRAME_H
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#define _LINUX_FRAME_H
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#ifdef CONFIG_STACK_VALIDATION
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/*
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* This macro marks the given function's stack frame as "non-standard", which
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* tells objtool to ignore the function when doing stack metadata validation.
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* It should only be used in special cases where you're 100% sure it won't
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* affect the reliability of frame pointers and kernel stack traces.
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*
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* For more information, see tools/objtool/Documentation/stack-validation.txt.
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*/
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#define STACK_FRAME_NON_STANDARD(func) \
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static void __used __section(__func_stack_frame_non_standard) \
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*__func_stack_frame_non_standard_##func = func
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#else /* !CONFIG_STACK_VALIDATION */
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#define STACK_FRAME_NON_STANDARD(func)
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#endif /* CONFIG_STACK_VALIDATION */
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#endif /* _LINUX_FRAME_H */
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