0062-aarch64-correct-CFI-in-rawmemchr-bug-31113.patch

From 168ae58e6e705a53a71850ee63ba5514fd5d7b70 Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@suse.de>
Date: Thu, 23 Nov 2023 18:23:46 +0100
Subject: [PATCH] aarch64: correct CFI in rawmemchr (bug 31113)

The .cfi_return_column directive changes the return column for the whole
FDE range.  But the actual intent is to tell the unwinder that the value
in x30 (lr) now resides in x15 after the move, and that is expressed by
the .cfi_register directive.

(cherry picked from commit 3f798427884fa57770e8e2291cf58d5918254bb5)
---
 sysdeps/aarch64/rawmemchr.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/aarch64/rawmemchr.S b/sysdeps/aarch64/rawmemchr.S
index efc4b7007b..1fff094215 100644
--- a/sysdeps/aarch64/rawmemchr.S
+++ b/sysdeps/aarch64/rawmemchr.S
@@ -31,7 +31,7 @@ ENTRY (__rawmemchr)
 
 L(do_strlen):
 	mov	x15, x30
-	cfi_return_column (x15)
+	cfi_register (x30, x15)
 	mov	x14, x0
 	bl	__strlen
 	add	x0, x14, x0
-- 
2.44.0