linux-kernel - [PATCH v5 12/16] objtool: Read special sections with alts only when specific options are selected

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Date:   Fri, 28 Oct 2022 20:03:42 +0530
From:   Sathvika Vasireddy <sv@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org
Cc:     jpoimboe@...hat.com, peterz@...radead.org,
        linux-kernel@...r.kernel.org, aik@...abs.ru, mpe@...erman.id.au,
        mingo@...hat.com, christophe.leroy@...roup.eu, rostedt@...dmis.org,
        mbenes@...e.cz, npiggin@...il.com, chenzhongjin@...wei.com,
        naveen.n.rao@...ux.vnet.ibm.com, sv@...ux.ibm.com
Subject: [PATCH v5 12/16] objtool: Read special sections with alts only when specific options are selected

Call add_special_section_alts() only when stackval or orc or uaccess or
noinstr options are passed to objtool.

Tested-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@...ux.vnet.ibm.com>
Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
Acked-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Sathvika Vasireddy <sv@...ux.ibm.com>
---
 tools/objtool/check.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 71cf4b4ba1da..752a6ffd5c4c 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2392,9 +2392,11 @@ static int decode_sections(struct objtool_file *file)
 	 * Must be before add_jump_destinations(), which depends on 'func'
 	 * being set for alternatives, to enable proper sibling call detection.
 	 */
-	ret = add_special_section_alts(file);
-	if (ret)
-		return ret;
+	if (opts.stackval || opts.orc || opts.uaccess || opts.noinstr) {
+		ret = add_special_section_alts(file);
+		if (ret)
+			return ret;
+	}
 
 	ret = add_jump_destinations(file);
 	if (ret)
-- 
2.31.1