From: Guillaume Gardet <guillaume.gardet@arm.com>
Date: Mon, 14 Dec 2020 15:38:22 +0000 (+0000)
Subject: aarch64: fix static PIE start code for BTI [BZ #27068]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3cb8f6222a3cb955712b720d7c0c0dba37898f9;p=thirdparty%2Fglibc.git

aarch64: fix static PIE start code for BTI [BZ #27068]

A bti c was missing from rcrt1.o which made all -static-pie
binaries fail at program startup on BTI enabled systems.

Fixes bug 27068.

(cherry picked from commit d4136903a29baabeec8987b53081def8b4a49826)
---

diff --git a/sysdeps/aarch64/start.S b/sysdeps/aarch64/start.S
index 108f602721b..1998ea95d40 100644
--- a/sysdeps/aarch64/start.S
+++ b/sysdeps/aarch64/start.S
@@ -99,6 +99,7 @@ ENTRY(_start)
 	   because crt1.o and rcrt1.o share code and the later must avoid the
 	   use of GOT relocations before __libc_start_main is called.  */
 __wrap_main:
+	BTI_C
 	b	main
 #endif
 END(_start)