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objtool: Add CONFIG_OBJTOOL

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Now that stack validation is an optional feature of objtool, add
CONFIG_OBJTOOL and replace most usages of CONFIG_STACK_VALIDATION with
it.

CONFIG_STACK_VALIDATION can now be considered to be frame-pointer
specific.  CONFIG_UNWINDER_ORC is already inherently valid for live
patching, so no need to "validate" it.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Link: https://lkml.kernel.org/r/939bf3d85604b2a126412bf11af6e3bd3b872bcb.1650300597.git.jpoimboe@redhat.com
This commit is contained in:
Josh Poimboeuf
2022-04-18 09:50:36 -07:00
committed by Peter Zijlstra
parent c2bdd61c98
commit 03f16cd020
17 changed files with 73 additions and 57 deletions
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6
include/linux/objtool.h
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@@ -38,7 +38,7 @@ struct unwind_hint {
#define UNWIND_HINT_TYPE_REGS_PARTIAL 2
#define UNWIND_HINT_TYPE_FUNC 3
#ifdef CONFIG_STACK_VALIDATION
#ifdef CONFIG_OBJTOOL
#ifndef __ASSEMBLY__
@@ -157,7 +157,7 @@ struct unwind_hint {
#endif /* __ASSEMBLY__ */
#else /* !CONFIG_STACK_VALIDATION */
#else /* !CONFIG_OBJTOOL */
#ifndef __ASSEMBLY__
@@ -179,6 +179,6 @@ struct unwind_hint {
.endm
#endif
#endif /* CONFIG_STACK_VALIDATION */
#endif /* CONFIG_OBJTOOL */
#endif /* _LINUX_OBJTOOL_H */