[uclibc-ng-devel] Re: Bug in memset on ARM

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"tombannink" == tombannink tombannink@gmail.com writes:

From 0a45e40834eeb8fc42f74645be715ca14432a767 Mon Sep 17 00:00:00 2001 From: Tom Bannink tombannink@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-instructions...