diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2024-11-28 10:38:52 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-12-02 12:01:41 +0100 |
| commit | 2116b349e29a2e9ba17ea2e45b31234e4b350793 (patch) | |
| tree | 6dd85584c3a83a90e0bc469b1fc2854688624044 /include/linux/objtool.h | |
| parent | 40384c840ea1944d7c5a392e8975ed088ecf0b37 (diff) | |
objtool: Generic annotation infrastructure
Avoid endless .discard.foo sections for each annotation, create a
single .discard.annotate_insn section that takes an annotation type along
with the instruction.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/20241128094310.932794537@infradead.org
Diffstat (limited to 'include/linux/objtool.h')
| -rw-r--r-- | include/linux/objtool.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/objtool.h b/include/linux/objtool.h index b3b8d3dab52d..d98531ecc687 100644 --- a/include/linux/objtool.h +++ b/include/linux/objtool.h @@ -57,6 +57,13 @@ ".long 998b\n\t" \ ".popsection\n\t" +#define ASM_ANNOTATE(type) \ + "911:\n\t" \ + ".pushsection .discard.annotate_insn,\"M\",@progbits,8\n\t" \ + ".long 911b - .\n\t" \ + ".long " __stringify(type) "\n\t" \ + ".popsection\n\t" + #else /* __ASSEMBLY__ */ /* @@ -146,6 +153,14 @@ .popsection .endm +.macro ANNOTATE type:req +.Lhere_\@: + .pushsection .discard.annotate_insn,"M",@progbits,8 + .long .Lhere_\@ - . + .long \type + .popsection +.endm + #endif /* __ASSEMBLY__ */ #else /* !CONFIG_OBJTOOL */ @@ -155,6 +170,7 @@ #define UNWIND_HINT(type, sp_reg, sp_offset, signal) "\n\t" #define STACK_FRAME_NON_STANDARD(func) #define STACK_FRAME_NON_STANDARD_FP(func) +#define ASM_ANNOTATE(type) #define ANNOTATE_NOENDBR #define ASM_REACHABLE #else @@ -167,6 +183,8 @@ .endm .macro REACHABLE .endm +.macro ANNOTATE type:req +.endm #endif #endif /* CONFIG_OBJTOOL */ |