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aes/asm/bsaes-armv7.pl: relax stack alignment requirement.

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Even though Apple refers to Procedure Call Standard for ARM Architecture
(AAPCS), they apparently adhere to custom version that doesn't follow
stack alignment constraints in the said standard. [Why or why? If it's
vendor lock-in thing, then it would be like worst spot ever.] And since
bsaes-armv7 relied on standard alignment, it became problematic to
execute the code on iOS.

Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Andy Polyakov 2017-03-25 10:58:57 +01:00
parent e08b444ac0
commit 0822d41b6d
1 changed files with 1 additions and 1 deletions
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crypto/aes/asm/bsaes-armv7.pl
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@ -1365,7 +1365,7 @@ bsaes_cbc_encrypt:
vmov @XMM[4],@XMM[15] @ just in case ensure that IV vmov @XMM[4],@XMM[15] @ just in case ensure that IV
vmov @XMM[5],@XMM[0] @ and input are preserved vmov @XMM[5],@XMM[0] @ and input are preserved
bl AES_decrypt bl AES_decrypt
vld1.8 {@XMM[0]}, [$fp,:64] @ load result vld1.8 {@XMM[0]}, [$fp] @ load result
veor @XMM[0], @XMM[0], @XMM[4] @ ^= IV veor @XMM[0], @XMM[0], @XMM[4] @ ^= IV
vmov @XMM[15], @XMM[5] @ @XMM[5] holds input vmov @XMM[15], @XMM[5] @ @XMM[5] holds input
vst1.8 {@XMM[0]}, [$rounds] @ write output vst1.8 {@XMM[0]}, [$rounds] @ write output