linux-kernel - [PATCH V2 15/41] objtool: Allow .entry.text function using CLD instruction

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: <20210926150838.197719-16-jiangshanlai@gmail.com>
Date:   Sun, 26 Sep 2021 23:08:12 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Lai Jiangshan <laijs@...ux.alibaba.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH V2 15/41] objtool: Allow .entry.text function using CLD instruction

From: Lai Jiangshan <laijs@...ux.alibaba.com>

The whole error_entry() will be implemented in C which has a CLD
instruction.

Signed-off-by: Lai Jiangshan <laijs@...ux.alibaba.com>
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 84e59a97bab6..2c775317b864 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -3103,7 +3103,7 @@ static int validate_branch(struct objtool_file *file, struct symbol *func,
 			break;
 
 		case INSN_CLD:
-			if (!state.df && func) {
+			if (!state.df && func && strcmp(sec->name, ".entry.text")) {
 				WARN_FUNC("redundant CLD", sec, insn->offset);
 				return 1;
 			}
-- 
2.19.1.6.gb485710b