From 262ea4f670b792d0985090b1187b1f1ce2c2c648 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Sat, 28 Jan 2017 23:25:36 +0000
Subject: [PATCH] crypto: arm64/aes - avoid literals for cross-module symbol
references
Using simple adrp/add pairs to refer to the AES lookup tables exposed by
the generic AES driver (which could be loaded far away from this driver
when KASLR is in effect) was unreliable at module load time before commit
41c066f2c4d4 ("arm64: assembler: make adr_l work in modules under KASLR"),
which is why the AES code used literals instead.
So now we can get rid of the literals, and switch to the adr_l macro.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
arch/arm64/crypto/aes-cipher-core.S | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/crypto/aes-cipher-core.S b/arch/arm64/crypto/aes-cipher-core.S
index 37590ab8121a3..cd58c61e6677d 100644
--- a/arch/arm64/crypto/aes-cipher-core.S
+++ b/arch/arm64/crypto/aes-cipher-core.S
@@ -89,8 +89,8 @@ CPU_BE( rev w8, w8 )
eor w7, w7, w11
eor w8, w8, w12
- ldr tt, =\ttab
- ldr lt, =\ltab
+ adr_l tt, \ttab
+ adr_l lt, \ltab
tbnz rounds, #1, 1f
@@ -111,9 +111,6 @@ CPU_BE( rev w8, w8 )
stp w5, w6, [out]
stp w7, w8, [out, #8]
ret
-
- .align 4
- .ltorg
.endm
.align 5
--
2.30.2