12 Apr
2022
12 Apr
'22
1:18 p.m.
>>>> "tombannink" == tombannink
<tombannink(a)gmail.com> writes:
From 0a45e40834eeb8fc42f74645be715ca14432a767 Mon Sep
17 00:00:00 2001
From: Tom Bannink <tombannink(a)gmail.com>
Date: Tue, 12 Apr 2022 11:15:41 +0200
Subject: [PATCH] Fix bug in ARM memset implementation
The ARM implementation of memset has a bug when the
fill-value is negative or outside the
[0, 255] range. To reproduce:
Thanks!
+++ b/libc/string/arm/memset.S
@@ -32,6 +32,7 @@ memset:
cmp r2, #8 @ at least 8 bytes to do?
bcc 2f
+ uxtb r1, r1
uxtb is an ARMv6+ instruction, maybe use and instead for compatibility?
https://developer.arm.com/documentation/dui0489/i/arm-and-thumb-instruction…
--
Bye, Peter Korsgaard