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crypto: arm64/poly1305 - move data to rodata section

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When objtool gains support for ARM in the future, it may encounter issues
disassembling the following data in the .text section:
> .Lzeros:
> .long   0,0,0,0,0,0,0,0
> .asciz  "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
> .align  2

Move it to .rodata which is a more appropriate section for read-only data.

There is a limit on how far the label can be from the instruction, hence
use "adrp" and low 12bits offset of the label to avoid the compilation
error.

Signed-off-by: Jia He <justin.he@arm.com>
Tested-by: Daniel Gomez <da.gomez@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jia He 2024-08-06 05:54:44 +00:00 committed by Herbert Xu
parent 18e2188c4b
commit 9369693a2c
1 changed files with 5 additions and 1 deletions
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6
arch/arm64/crypto/poly1305-armv8.pl
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@ -473,7 +473,8 @@ poly1305_blocks_neon:
subs $len,$len,#64
ldp x9,x13,[$inp,#48]
add $in2,$inp,#96
adr $zeros,.Lzeros
adrp $zeros,.Lzeros
add $zeros,$zeros,#:lo12:.Lzeros
lsl $padbit,$padbit,#24
add x15,$ctx,#48
@ -885,10 +886,13 @@ poly1305_blocks_neon:
ret
.size poly1305_blocks_neon,.-poly1305_blocks_neon
.pushsection .rodata
.align 5
.Lzeros:
.long 0,0,0,0,0,0,0,0
.asciz "Poly1305 for ARMv8, CRYPTOGAMS by \@dot-asm"
.popsection
.align 2
#if !defined(__KERNEL__) && !defined(_WIN64)
.comm OPENSSL_armcap_P,4,4