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From: Wilco Dijkstra <wilco@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/release/2.35/master] aarch64: correct CFI in rawmemchr (bug 31113)
Date: Wed, 10 Apr 2024 15:08:08 +0000 (GMT) [thread overview]
Message-ID: <20240410150808.4CE2F3846077@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9112cda4c62e8a410be775045d5d307ebb48f0fe
commit 9112cda4c62e8a410be775045d5d307ebb48f0fe
Author: Andreas Schwab <schwab@suse.de>
Date: Thu Nov 23 18:23:46 2023 +0100
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)
Diff:
---
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 55d9e34d4f..f90ce2bf86 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
reply other threads:[~2024-04-10 15:08 UTC|newest]
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