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objtool: Add frame-pointer-specific function ignore

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[ Upstream commit e028c4f7ac7ca8c96126fe46c54ab3d56ffe6a66 ]

Add a CONFIG_FRAME_POINTER-specific version of
STACK_FRAME_NON_STANDARD() for the case where a function is
intentionally missing frame pointer setup, but otherwise needs
objtool/ORC coverage when frame pointers are disabled.

Link: https://lkml.kernel.org/r/163163047364.489837.17377799909553689661.stgit@devnote2

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Stable-dep-of: c8c301abeae5 ("x86/ibt: Add ANNOTATE_NOENDBR")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Josh Poimboeuf
2021-09-14 23:41:13 +09:00
committed by Greg Kroah-Hartman
parent bd3d12e6fd
commit bbbe1b23c7
2 changed files with 24 additions and 0 deletions
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12
include/linux/objtool.h
View File

@@ -71,6 +71,17 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
/*
* STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
* for the case where a function is intentionally missing frame pointer setup,
* but otherwise needs objtool/ORC coverage when frame pointers are disabled.
*/
#ifdef CONFIG_FRAME_POINTER
#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
#else
#define STACK_FRAME_NON_STANDARD_FP(func)
#endif
#else /* __ASSEMBLY__ */
/*
@@ -126,6 +137,7 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
#define STACK_FRAME_NON_STANDARD_FP(func)
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0

12
tools/include/linux/objtool.h
View File

@@ -71,6 +71,17 @@ struct unwind_hint {
static void __used __section(".discard.func_stack_frame_non_standard") \
*__func_stack_frame_non_standard_##func = func
/*
* STACK_FRAME_NON_STANDARD_FP() is a frame-pointer-specific function ignore
* for the case where a function is intentionally missing frame pointer setup,
* but otherwise needs objtool/ORC coverage when frame pointers are disabled.
*/
#ifdef CONFIG_FRAME_POINTER
#define STACK_FRAME_NON_STANDARD_FP(func) STACK_FRAME_NON_STANDARD(func)
#else
#define STACK_FRAME_NON_STANDARD_FP(func)
#endif
#else /* __ASSEMBLY__ */
/*
@@ -126,6 +137,7 @@ struct unwind_hint {
#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
#define STACK_FRAME_NON_STANDARD_FP(func)
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0