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From: Youling Tang <tangyouling@loongson.cn>
To: Josh Poimboeuf <jpoimboe@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Huacai Chen <chenhuacai@kernel.org>,
madvenka@linux.microsoft.com
Cc: chenzhongjin@huawei.com, WANG Xuerui <kernel@xen0n.name>,
Xi Ruoyao <xry111@xry111.site>, live-patching@vger.kernel.org,
linux-kernel@vger.kernel.org, loongarch@lists.linux.dev,
tangyouling00@gmail.com, youling.tang@outlook.com
Subject: [RFC PATCH v1 12/23] LoongArch: bug: Add reachable annotation to
warning macros
Date: Tue, 20 Jun 2023 15:50:08 +0800
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| Series |
LoongArch: Add objtool and ORC unwinder support
|
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Commit Message
Youling Tang
June 20, 2023, 7:50 a.m. UTC
WARN* and BUG* both use `break 0x1` opcodes and the distinction is
provided by the contents of the bug table. This table is not accessible
to objtool, so add an annotation to WARN* macros to let objtool know
that break handler will return an resume the execution of the instructions
following the WARN's break.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
---
arch/loongarch/include/asm/bug.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/loongarch/include/asm/bug.h b/arch/loongarch/include/asm/bug.h index d4ca3ba25418..08388876ade4 100644 --- a/arch/loongarch/include/asm/bug.h +++ b/arch/loongarch/include/asm/bug.h @@ -44,6 +44,7 @@ do { \ instrumentation_begin(); \ __BUG_FLAGS(BUGFLAG_WARNING|(flags)); \ + annotate_reachable(); \ instrumentation_end(); \ } while (0)