From: Naohiro Tamura <naohirot@fujitsu.com>
Date: Fri, 24 Sep 2021 07:49:59 +0000 (+0000)
Subject: aarch64: Disable A64FX memcpy/memmove BTI unconditionally
X-Git-Tag: glibc-2.35~492
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=381b29616abb82babc8163bdf516c6da87544b35;p=platform%2Fupstream%2Fglibc.git

aarch64: Disable A64FX memcpy/memmove BTI unconditionally

This patch disables A64FX memcpy/memmove BTI instruction insertion
unconditionally such as A64FX memset patch [1] for performance.

[1] commit 07b427296b8d59f439144029d9a948f6c1ce0a31

Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
---

diff --git a/sysdeps/aarch64/multiarch/memcpy_a64fx.S b/sysdeps/aarch64/multiarch/memcpy_a64fx.S
index 65528405bb..ae7464e09f 100644
--- a/sysdeps/aarch64/multiarch/memcpy_a64fx.S
+++ b/sysdeps/aarch64/multiarch/memcpy_a64fx.S
@@ -19,6 +19,9 @@
 
 #include <sysdep.h>
 
+#undef BTI_C
+#define BTI_C
+
 /* Assumptions:
  *
  * ARMv8.2-a, AArch64, unaligned accesses, sve