Fix assembler warnings.
There are a few instructions deprecated on armv8 that result in lots
of warnings. Add an arch directive so that these warnings go away.
This doesn't cause any problems because the instructions still
execute properly.
Bug: 38319728
Test: Built all of these assembler files and verified the warning are gone.
Change-Id: If063defdd16f290c01975233c8d257d1b2005e76
diff --git a/libc/arch-arm/denver/bionic/__strcat_chk.S b/libc/arch-arm/denver/bionic/__strcat_chk.S
index 9f7db59..d4f651c 100644
--- a/libc/arch-arm/denver/bionic/__strcat_chk.S
+++ b/libc/arch-arm/denver/bionic/__strcat_chk.S
@@ -33,6 +33,10 @@
.thumb
.thumb_func
+ // To avoid warning about deprecated instructions, add an explicit
+ // arch. The code generated is exactly the same.
+ .arch armv7-a
+
// Get the length of src string, then get the source of the dst string.
// Check that the two lengths together don't exceed the threshold, then
// do a memcpy of the data.
diff --git a/libc/arch-arm/denver/bionic/__strcpy_chk.S b/libc/arch-arm/denver/bionic/__strcpy_chk.S
index 9b7ea91..9295a00 100644
--- a/libc/arch-arm/denver/bionic/__strcpy_chk.S
+++ b/libc/arch-arm/denver/bionic/__strcpy_chk.S
@@ -33,6 +33,10 @@
.thumb
.thumb_func
+ // To avoid warning about deprecated instructions, add an explicit
+ // arch. The code generated is exactly the same.
+ .arch armv7-a
+
// Get the length of the source string first, then do a memcpy of the data
// instead of a strcpy.
ENTRY(__strcpy_chk)
diff --git a/libc/arch-arm/denver/bionic/memcpy.S b/libc/arch-arm/denver/bionic/memcpy.S
index d4e0fb4..743c74b 100644
--- a/libc/arch-arm/denver/bionic/memcpy.S
+++ b/libc/arch-arm/denver/bionic/memcpy.S
@@ -61,6 +61,10 @@
.syntax unified
.fpu neon
+ // To avoid warning about deprecated instructions, add an explicit
+ // arch. The code generated is exactly the same.
+ .arch armv7-a
+
ENTRY(__memcpy_chk)
cmp r2, r3
bls memcpy