kernel.git/arch/arm64/lib/memcmp.S, branch linux-4.19.y

arm64: lib: use C string functions with KASAN enabled

2019-12-01T08:17:01Z

[ Upstream commit 19a2ca0fb560fd7be7b5293c6b652c6d6078dcde ] ARM64 has asm implementation of memchr(), memcmp(), str[r]chr(), str[n]cmp(), str[n]len(). KASAN don't see memory accesses in asm code, thus it can potentially miss many bugs. Ifdef out __HAVE_ARCH_* defines of these functions when KASAN is enabled, so the generic implementations from lib/string.c will be used. We can't just remove the asm functions because efistub uses them. And we can't have two non-weak functions either, so declare the asm functions as weak. Link: http://lkml.kernel.org/r/20180920135631.23833-2-aryabinin@virtuozzo.com Signed-off-by: Andrey Ryabinin Reported-by: Kyeongdon Kim Cc: Alexander Potapenko Cc: Ard Biesheuvel Cc: Dmitry Vyukov Cc: Mark Rutland Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin

arm64: Fix misspellings in comments.

2016-03-04T18:19:17Z

Signed-off-by: Adam Buchbinder Signed-off-by: Catalin Marinas

arm64: use ENDPIPROC() to annotate position independent assembler routines

2015-10-12T15:19:45Z

For more control over which functions are called with the MMU off or with the UEFI 1:1 mapping active, annotate some assembler routines as position independent. This is done by introducing ENDPIPROC(), which replaces the ENDPROC() declaration of those routines. Signed-off-by: Ard Biesheuvel Signed-off-by: Catalin Marinas

arm64: lib: Implement optimized memcmp routine

2014-05-23T14:07:57Z

This patch, based on Linaro's Cortex Strings library, adds an assembly optimized memcmp() function. Signed-off-by: Zhichang Yuan Signed-off-by: Deepak Saxena Signed-off-by: Catalin Marinas