gentoo-overlay/dev-libs/openssl/files/openssl-1.0.0d-alpha-fix-unalign.patch

fix unaligned access in alpha specific 'OPENSSL_cleanse' function

Debugged with the following simple program:
    // gcc cleanse_test.c -o ct -lcrypto
    #include <openssl/crypto.h>
    int main(void)
    {
        char buffer [128];
        int off;
        int sz;
        for (off = 0; off < sizeof (buffer); ++off)
            for (sz = 0; sz < sizeof (buffer) - off; ++sz)
                OPENSSL_cleanse (buffer + off, sz);
        return 0;
    }
    $ prctl --unaligned=signal ./cleanse_test
    Bus error

https://bugs.gentoo.org/show_bug.cgi?id=371561
http://cvs.openssl.org/chngview?cn=21233
Reported by Tobias Klausmann <klausman@gentoo.org>
Fixed by Andy Polyakov <appro@openssl.org>
diff --git a/crypto/alphacpuid.pl b/crypto/alphacpuid.pl
index 11f2e30..5b0e21b 100644
--- a/crypto/alphacpuid.pl
+++ b/crypto/alphacpuid.pl
@@ -99,19 +99,19 @@ OPENSSL_cleanse:
 	beq	$0,.Laligned
 
 .Little:
+	subq	$0,8,$0
 	ldq_u	$1,0($16)
 	mov	$16,$2
 .Lalign:
 	mskbl	$1,$16,$1
 	lda	$16,1($16)
 	subq	$17,1,$17
-	subq	$0,1,$0
+	addq	$0,1,$0
 	beq	$17,.Lout
 	bne	$0,.Lalign
 .Lout:	stq_u	$1,0($2)
 	beq	$17,.Ldone
 	bic	$17,7,$at
-	mov	$17,$0
 	beq	$at,.Little
 
 .Laligned:
@@ -120,9 +120,7 @@ OPENSSL_cleanse:
 	lda	$16,8($16)
 	bic	$17,7,$at
 	bne	$at,.Laligned
-	beq	$17,.Ldone
-	mov	$17,$0
-	br	.Little
+	bne	$17,.Little
 .Ldone: ret	($26)
 .end	OPENSSL_cleanse
 ___