linux-kernel - [RFC PATCH v1 12/23] LoongArch: bug: Add reachable annotation to warning macros

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1687247415-32057-3-git-send-email-tangyouling@loongson.cn>
Date:   Tue, 20 Jun 2023 15:50:08 +0800
From:   Youling Tang <tangyouling@...ngson.cn>
To:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Huacai Chen <chenhuacai@...nel.org>,
        madvenka@...ux.microsoft.com
Cc:     chenzhongjin@...wei.com, WANG Xuerui <kernel@...0n.name>,
        Xi Ruoyao <xry111@...111.site>, live-patching@...r.kernel.org,
        linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
        tangyouling00@...il.com, youling.tang@...look.com
Subject: [RFC PATCH v1 12/23] LoongArch: bug: Add reachable annotation to warning macros

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@...ngson.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)
 
-- 
2.39.2