Messages in this thread Patch in this message | | | From | Chen Zhongjin <> | Subject | [PATCH v6 26/33] arm64: crypto: Remove unnecessary stackframe | Date | Thu, 23 Jun 2022 09:49:10 +0800 |
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The way sha256_block_neon restore the stackframe confuses objtool. But it turns out this function is a leaf function and does not use FP nor LR as scratch register.
Do not create a stackframe in this function as it is not necessary.
Signed-off-by: Julien Thierry <jthierry@redhat.com> Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com> --- arch/arm64/crypto/sha512-armv8.pl | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/arm64/crypto/sha512-armv8.pl b/arch/arm64/crypto/sha512-armv8.pl index 1882c4110026..6e2a96e05c5a 100644 --- a/arch/arm64/crypto/sha512-armv8.pl +++ b/arch/arm64/crypto/sha512-armv8.pl @@ -648,8 +648,6 @@ $code.=<<___; .align 4 sha256_block_neon: .Lneon_entry: - stp x29, x30, [sp, #-16]! - mov x29, sp sub sp,sp,#16*4 adr $Ktbl,K256 @@ -736,8 +734,7 @@ $code.=<<___; mov $Xfer,sp b.ne .L_00_48 - ldr x29,[x29] - add sp,sp,#16*4+16 + add sp,sp,#16*4 ret .size sha256_block_neon,.-sha256_block_neon ___ -- 2.17.1
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