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objtool: Consolidate annotation macros

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Consolidate __ASM_ANNOTATE into a single macro which is used by both C
and asm.  This also makes the code generation a bit more palatable by
putting it all on a single line.

Turn this:

	911:
	       .pushsection .discard.annotate_insn,"M", @progbits, 8
	       .long 911b - .
	       .long 1
	       .popsection
	       jmp __x86_return_thunk

Into:

	911: .pushsection ".discard.annotate_insn", "M", @progbits, 8; .long 911b - .; .long 1; .popsection
	jmp __x86_return_thunk

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://patch.msgid.link/c05ff40d3383e85c3b59018ef0b3c7aaf993a60d.1764694625.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf
2025-12-02 09:59:38 -08:00
committed by Ingo Molnar
parent f387d0e102
commit 305c8dc477
1 changed files with 15 additions and 21 deletions
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36
include/linux/annotate.h
View File

@@ -6,41 +6,35 @@
#ifdef CONFIG_OBJTOOL
#define __ASM_ANNOTATE(section, label, type) \
.pushsection section, "M", @progbits, 8; \
.long label - .; \
.long type; \
.popsection
#ifndef __ASSEMBLY__
#define __ASM_ANNOTATE(section, label, type) \
".pushsection " section ",\"M\", @progbits, 8\n\t" \
".long " __stringify(label) " - .\n\t" \
".long " __stringify(type) "\n\t" \
".popsection\n\t"
#define ASM_ANNOTATE_LABEL(label, type) \
__ASM_ANNOTATE(".discard.annotate_insn", label, type)
__stringify(__ASM_ANNOTATE(".discard.annotate_insn", label, type)) "\n\t"
#define ASM_ANNOTATE(type) \
"911:\n\t" \
ASM_ANNOTATE_LABEL(911b, type)
"911: " \
__stringify(__ASM_ANNOTATE(".discard.annotate_insn", 911b, type)) "\n\t"
#define ASM_ANNOTATE_DATA(type) \
"912:\n\t" \
__ASM_ANNOTATE(".discard.annotate_data", 912b, type)
"912: " \
__stringify(__ASM_ANNOTATE(".discard.annotate_data", 912b, type)) "\n\t"
#else /* __ASSEMBLY__ */
.macro __ANNOTATE section, type
.Lhere_\@:
.pushsection \section, "M", @progbits, 8
.long .Lhere_\@ - .
.long \type
.popsection
.endm
.macro ANNOTATE type
__ANNOTATE ".discard.annotate_insn", \type
.Lhere_\@:
__ASM_ANNOTATE(".discard.annotate_insn", .Lhere_\@, \type)
.endm
.macro ANNOTATE_DATA type
__ANNOTATE ".discard.annotate_data", \type
.Lhere_\@:
__ASM_ANNOTATE(".discard.annotate_data", .Lhere_\@, \type)
.endm
#endif /* __ASSEMBLY__ */