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* [glibc/release/2.37/master] aarch64: correct CFI in rawmemchr (bug 31113)
@ 2024-04-10 13:38 Wilco Dijkstra
0 siblings, 0 replies; only message in thread
From: Wilco Dijkstra @ 2024-04-10 13:38 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=882b7dc2ab90b3c1280b67aed792142a265d7595
commit 882b7dc2ab90b3c1280b67aed792142a265d7595
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 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
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2024-04-10 13:38 [glibc/release/2.37/master] aarch64: correct CFI in rawmemchr (bug 31113) Wilco Dijkstra
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