hardening: remove pointless ARM __get_pc() function

Useful if you're trying to defeat ASLR, otherwise not
so much ...

Change-Id: I17ebb50bb490a3967db9c3038f049adafe2b8ea7
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@gmail.com>
diff --git a/libc/Android.mk b/libc/Android.mk
index 8085ac5..04301ef 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -362,7 +362,6 @@
 # =========================================================
 ifeq ($(TARGET_ARCH),arm)
 libc_common_src_files += \
-	arch-arm/bionic/__get_pc.S \
 	arch-arm/bionic/__get_sp.S \
 	arch-arm/bionic/_exit_with_stack_teardown.S \
 	arch-arm/bionic/_setjmp.S \
diff --git a/libc/arch-arm/bionic/__get_pc.S b/libc/arch-arm/bionic/__get_pc.S
deleted file mode 100644
index 4fc8929..0000000
--- a/libc/arch-arm/bionic/__get_pc.S
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-.global __get_pc
-.type __get_pc, %function
-
-__get_pc:
-	mov r0, pc
-	bx lr
-