2022-09-22 13:18:48

by Chen Zhongjin

[permalink] [raw]
Subject: [PATCH -next 0/3] arm64: Mark constants in .S files as data

There are some constant numbers insdide .S files which is mixed with
text sections. When tools are reading the ELF files they cannot
distinguish these constants out of normal instructions.

Mark these constants as data symbols by wrapping then with SYM_DATA
macro.

Chen Zhongjin (3):
arm64: efi-header: Mark efi header as data
arm64: head: Mark constants as data
arm64: crypto: Mark constant as data

arch/arm64/crypto/aes-neonbs-core.S | 14 +++++++-------
arch/arm64/crypto/poly1305-armv8.pl | 4 ++++
arch/arm64/crypto/polyval-ce-core.S | 7 +++----
arch/arm64/crypto/sha512-armv8.pl | 24 ++++++++++++++----------
arch/arm64/kernel/efi-header.S | 2 ++
arch/arm64/kernel/head.S | 6 ++++--
6 files changed, 34 insertions(+), 23 deletions(-)

--
2.17.1


2022-09-22 13:19:22

by Chen Zhongjin

[permalink] [raw]
Subject: [PATCH -next 3/3] arm64: crypto: Mark constant as data

Use SYM_DATA_* macros to annotate data bytes in the middle of .text
sections.

For local symbols, ".L" prefix needs to be dropped as the assembler
may exclude the symbols from the .o symbol table.

Signed-off-by: Julien Thierry <[email protected]>
Signed-off-by: Chen Zhongjin <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
---
arch/arm64/crypto/aes-neonbs-core.S | 14 +++++++-------
arch/arm64/crypto/poly1305-armv8.pl | 4 ++++
arch/arm64/crypto/polyval-ce-core.S | 7 +++----
arch/arm64/crypto/sha512-armv8.pl | 24 ++++++++++++++----------
4 files changed, 28 insertions(+), 21 deletions(-)

diff --git a/arch/arm64/crypto/aes-neonbs-core.S b/arch/arm64/crypto/aes-neonbs-core.S
index d427f4556b6e..fa161d1bf264 100644
--- a/arch/arm64/crypto/aes-neonbs-core.S
+++ b/arch/arm64/crypto/aes-neonbs-core.S
@@ -367,15 +367,15 @@


.align 6
-M0: .octa 0x0004080c0105090d02060a0e03070b0f
+SYM_DATA_LOCAL(M0, .octa 0x0004080c0105090d02060a0e03070b0f)

-M0SR: .octa 0x0004080c05090d010a0e02060f03070b
-SR: .octa 0x0f0e0d0c0a09080b0504070600030201
-SRM0: .octa 0x01060b0c0207080d0304090e00050a0f
+SYM_DATA_LOCAL(M0SR, .octa 0x0004080c05090d010a0e02060f03070b)
+SYM_DATA_LOCAL(SR, .octa 0x0f0e0d0c0a09080b0504070600030201)
+SYM_DATA_LOCAL(SRM0, .octa 0x01060b0c0207080d0304090e00050a0f)

-M0ISR: .octa 0x0004080c0d0105090a0e0206070b0f03
-ISR: .octa 0x0f0e0d0c080b0a090504070602010003
-ISRM0: .octa 0x0306090c00070a0d01040b0e0205080f
+SYM_DATA_LOCAL(M0ISR, .octa 0x0004080c0d0105090a0e0206070b0f03)
+SYM_DATA_LOCAL(ISR, .octa 0x0f0e0d0c080b0a090504070602010003)
+SYM_DATA_LOCAL(ISRM0, .octa 0x0306090c00070a0d01040b0e0205080f)

/*
* void aesbs_convert_key(u8 out[], u32 const rk[], int rounds)
diff --git a/arch/arm64/crypto/poly1305-armv8.pl b/arch/arm64/crypto/poly1305-armv8.pl
index cbc980fb02e3..f460f33c127a 100644
--- a/arch/arm64/crypto/poly1305-armv8.pl
+++ b/arch/arm64/crypto/poly1305-armv8.pl
@@ -47,6 +47,8 @@ my ($mac,$nonce)=($inp,$len);
my ($h0,$h1,$h2,$r0,$r1,$s1,$t0,$t1,$d0,$d1,$d2) = map("x$_",(4..14));

$code.=<<___;
+#include <linux/linkage.h>
+
#ifndef __KERNEL__
# include "arm_arch.h"
.extern OPENSSL_armcap_P
@@ -888,8 +890,10 @@ poly1305_blocks_neon:
.align 5
.Lzeros:
.long 0,0,0,0,0,0,0,0
+SYM_DATA_START_LOCAL(POLY1305_str)
.asciz "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
.align 2
+SYM_DATA_END(POLY1305_str)
#if !defined(__KERNEL__) && !defined(_WIN64)
.comm OPENSSL_armcap_P,4,4
.hidden OPENSSL_armcap_P
diff --git a/arch/arm64/crypto/polyval-ce-core.S b/arch/arm64/crypto/polyval-ce-core.S
index b5326540d2e3..9026a787b0de 100644
--- a/arch/arm64/crypto/polyval-ce-core.S
+++ b/arch/arm64/crypto/polyval-ce-core.S
@@ -65,8 +65,7 @@ GSTAR .req v24
.arch armv8-a+crypto
.align 4

-.Lgstar:
- .quad 0xc200000000000000, 0xc200000000000000
+SYM_DATA_LOCAL(gstar, .quad 0xc200000000000000, 0xc200000000000000)

/*
* Computes the product of two 128-bit polynomials in X and Y and XORs the
@@ -309,7 +308,7 @@ GSTAR .req v24
* void pmull_polyval_mul(u8 *op1, const u8 *op2);
*/
SYM_FUNC_START(pmull_polyval_mul)
- adr TMP, .Lgstar
+ adr TMP, gstar
ld1 {GSTAR.2d}, [TMP]
ld1 {v0.16b}, [x0]
ld1 {v1.16b}, [x1]
@@ -334,7 +333,7 @@ SYM_FUNC_END(pmull_polyval_mul)
* size_t nblocks, u8 *accumulator);
*/
SYM_FUNC_START(pmull_polyval_update)
- adr TMP, .Lgstar
+ adr TMP, gstar
mov KEY_START, KEY_POWERS
ld1 {GSTAR.2d}, [TMP]
ld1 {SUM.16b}, [ACCUMULATOR]
diff --git a/arch/arm64/crypto/sha512-armv8.pl b/arch/arm64/crypto/sha512-armv8.pl
index 35ec9ae99fe1..1882c4110026 100644
--- a/arch/arm64/crypto/sha512-armv8.pl
+++ b/arch/arm64/crypto/sha512-armv8.pl
@@ -193,6 +193,8 @@ ___
}

$code.=<<___;
+#include <linux/linkage.h>
+
#ifndef __KERNEL__
# include "arm_arch.h"
#endif
@@ -208,11 +210,11 @@ ___
$code.=<<___ if ($SZ==4);
#ifndef __KERNEL__
# ifdef __ILP32__
- ldrsw x16,.LOPENSSL_armcap_P
+ ldrsw x16,OPENSSL_armcap_P_rel
# else
- ldr x16,.LOPENSSL_armcap_P
+ ldr x16,OPENSSL_armcap_P_rel
# endif
- adr x17,.LOPENSSL_armcap_P
+ adr x17,OPENSSL_armcap_P_rel
add x16,x16,x17
ldr w16,[x16]
tst w16,#ARMV8_SHA256
@@ -237,7 +239,7 @@ $code.=<<___;
ldp $E,$F,[$ctx,#4*$SZ]
add $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
ldp $G,$H,[$ctx,#6*$SZ]
- adr $Ktbl,.LK$BITS
+ adr $Ktbl,K$BITS
stp $ctx,$num,[x29,#96]

.Loop:
@@ -287,8 +289,7 @@ $code.=<<___;
.size $func,.-$func

.align 6
-.type .LK$BITS,%object
-.LK$BITS:
+SYM_DATA_START_LOCAL(K$BITS)
___
$code.=<<___ if ($SZ==8);
.quad 0x428a2f98d728ae22,0x7137449123ef65cd
@@ -353,18 +354,21 @@ $code.=<<___ if ($SZ==4);
.long 0 //terminator
___
$code.=<<___;
-.size .LK$BITS,.-.LK$BITS
+SYM_DATA_END(K$BITS)
#ifndef __KERNEL__
.align 3
-.LOPENSSL_armcap_P:
+SYM_DATA_START_LOCAL(OPENSSL_armcap_P_rel)
# ifdef __ILP32__
.long OPENSSL_armcap_P-.
# else
.quad OPENSSL_armcap_P-.
# endif
+SYM_DATA_END(OPENSSL_armcap_P_rel)
#endif
+SYM_DATA_START_LOCAL(OPENSSL_str)
.asciz "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
.align 2
+SYM_DATA_END(OPENSSL_str)
___

if ($SZ==4) {
@@ -385,7 +389,7 @@ sha256_block_armv8:
add x29,sp,#0

ld1.32 {$ABCD,$EFGH},[$ctx]
- adr $Ktbl,.LK256
+ adr $Ktbl,K256

.Loop_hw:
ld1 {@MSG[0][email protected][3]},[$inp],#64
@@ -648,7 +652,7 @@ sha256_block_neon:
mov x29, sp
sub sp,sp,#16*4

- adr $Ktbl,.LK256
+ adr $Ktbl,K256
add $num,$inp,$num,lsl#6 // len to point at the end of inp

ld1.8 {@X[0]},[$inp], #16
--
2.17.1