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| author | Julien Thierry <jthierry@redhat.com> | 2020-09-04 16:30:25 +0100 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2020-09-10 10:43:13 -0500 |
| commit | 00089c048eb4a8250325efb32a2724fd0da68cce (patch) | |
| tree | 95bcd52651d909d2d8af2e39a99f4352fd6875c1 /include/linux/objtool.h | |
| parent | d871f7b5a6a2a30f4eba577fd56941fa3657e394 (diff) | |
| download | lwn-00089c048eb4a8250325efb32a2724fd0da68cce.tar.gz lwn-00089c048eb4a8250325efb32a2724fd0da68cce.zip | |
objtool: Rename frame.h -> objtool.h
Header frame.h is getting more code annotations to help objtool analyze
object files.
Rename the file to objtool.h.
[ jpoimboe: add objtool.h to MAINTAINERS ]
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Diffstat (limited to 'include/linux/objtool.h')
| -rw-r--r-- | include/linux/objtool.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/objtool.h b/include/linux/objtool.h new file mode 100644 index 000000000000..358175c9c2b5 --- /dev/null +++ b/include/linux/objtool.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_OBJTOOL_H +#define _LINUX_OBJTOOL_H + +#ifdef CONFIG_STACK_VALIDATION +/* + * This macro marks the given function's stack frame as "non-standard", which + * tells objtool to ignore the function when doing stack metadata validation. + * It should only be used in special cases where you're 100% sure it won't + * affect the reliability of frame pointers and kernel stack traces. + * + * For more information, see tools/objtool/Documentation/stack-validation.txt. + */ +#define STACK_FRAME_NON_STANDARD(func) \ + static void __used __section(.discard.func_stack_frame_non_standard) \ + *__func_stack_frame_non_standard_##func = func + +/* + * This macro indicates that the following intra-function call is valid. + * Any non-annotated intra-function call will cause objtool to issue a warning. + */ +#define ANNOTATE_INTRA_FUNCTION_CALL \ + 999: \ + .pushsection .discard.intra_function_calls; \ + .long 999b; \ + .popsection; + +#else /* !CONFIG_STACK_VALIDATION */ + +#define STACK_FRAME_NON_STANDARD(func) +#define ANNOTATE_INTRA_FUNCTION_CALL + +#endif /* CONFIG_STACK_VALIDATION */ + +#endif /* _LINUX_OBJTOOL_H */ |