Hi!
There is a problem in openssl-0.9.7c in asm version of bn_div_words
function for x86_64 cpus (file crypto/bn/asm/x86_64-gcc.c). This could
lead to arithmetic exceptions and incorrect work.
This patch should deal with the problem:
diff -ur openssl-0.9.7c/crypto/bn/asm/x86_64-gcc.c
/tmp/openssl-0.9.7c/crypto/bn/asm/x86_64-gcc.c
--- openssl-0.9.7c/crypto/bn/asm/x86_64-gcc.c 2002-12-14 23:45:35.000000000 +0300
+++ openssl-0.9.7c/crypto/bn/asm/x86_64-gcc.c 2004-02-02 16:06:15.079676792 +0300
@@ -142,7 +142,7 @@
BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
{ BN_ULONG ret,waste;
- asm ("divq %3"
+ asm ("divq %4"
: "=a"(ret),"=d"(waste)
: "a"(l),"d"(h),"g"(d)
: "cc");
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