linux-kernel - [PATCH 1/2] stackleak: Update for arm64

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Date:   Wed,  2 May 2018 13:33:25 -0700
From:   Laura Abbott <labbott@...hat.com>
To:     Alexander Popov <alex.popov@...ux.com>,
        Kees Cook <keescook@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>
Cc:     Laura Abbott <labbott@...hat.com>,
        kernel-hardening@...ts.openwall.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] stackleak: Update for arm64

arm64 has another layer of indirection in the RTL.
Account for this in the plugin.

Signed-off-by: Laura Abbott <labbott@...hat.com>
---
Fixed from previous version to be a vector expression.
---
 scripts/gcc-plugins/stackleak_plugin.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/gcc-plugins/stackleak_plugin.c b/scripts/gcc-plugins/stackleak_plugin.c
index 6ac2a055ec61..0a55ecaf44df 100644
--- a/scripts/gcc-plugins/stackleak_plugin.c
+++ b/scripts/gcc-plugins/stackleak_plugin.c
@@ -253,6 +253,10 @@ static unsigned int stackleak_cleanup_execute(void)
 		 * that insn.
 		 */
 		body = PATTERN(insn);
+		/* arm64 is different */
+		if (GET_CODE(body) == PARALLEL)
+			body = XVECEXP(body, 0, 0);
+
 		if (GET_CODE(body) != CALL)
 			continue;
 
-- 
2.14.3