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

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>
(cherry picked from commit 0822d41b6d54132df96c02cc6f6fa9b179378351)

diff --git a/crypto/aes/asm/bsaes-armv7.pl b/crypto/aes/asm/bsaes-armv7.pl
index 83343e2de1af7bd19b574aaa69e626428b273e51..70b3f9656f4fa734196896b942a1fbf0a02a6a66 100644 (file)
--- a/crypto/aes/asm/bsaes-armv7.pl
+++ b/crypto/aes/asm/bsaes-armv7.pl
@@ -1333,7 +1333,7 @@ bsaes_cbc_encrypt:
        vmov    @XMM[4],@XMM[15]                @ just in case ensure that IV
        vmov    @XMM[5],@XMM[0]                 @ and input are preserved
        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
        vmov    @XMM[15], @XMM[5]               @ @XMM[5] holds input
        vst1.8  {@XMM[0]}, [$rounds]            @ write output