Hello! On Thu, 7 Jul 2005, Andy Polyakov via RT wrote:
> > >>>>>Sorry, I've forgotten to mention I use 20050627 snapshot and > >>>>>./config -g shared zlib works fine. > > > > > >>Yet I find it a bit too puzzling... After I've replied I came to realize > >>that no-sse2/386 shouldn't actually affect the referred test > >>procedure... Indeed, even though there're SSE2 instructions present in > >>bn_mul_add_words, they operate on mmx registers and therefore don't > >>actually require kernel support. Kernel support required for SSE2 > >>instructions operating on 128-bit xmm registers, but not on 64-bit mmx > >>ones, and therefore if CPUID said SSE2 is available, then > >>bn_mul_add_words should have worked... So if you can have time I'd still > >>appreciate if you could collect and send over disassemble output in the > >>vicinity of segmentation fault, as well as info registers... Once again, > >>this is optional. A. > > > > > > (gdb) bt > > #0 0x281330a1 in bn_mul_add_words () from ./libcrypto.so.0.9.8 > > (gdb) info r > > eax 0x30281d48 807935304 > > (gdb) disassemble > > Dump of assembler code for function bn_mul_add_words: > > 0x28133090 <bn_mul_add_words+32>: call 0x28133095 > > <bn_mul_add_words+37> > > 0x28133095 <bn_mul_add_words+37>: pop %eax > > 0x28133096 <bn_mul_add_words+38>: add $0x163630,%eax > > 0x2813309b <bn_mul_add_words+43>: mov 0x2cc(%eax),%eax > > 0x281330a1 <bn_mul_add_words+49>: btl $0x1a,(%eax) > > btl? This most likely indicates bug in binutils or run-time linker, as > it's ld, which is solely responsible for constants above btl and > run-time linker is responsible for value found at 0x2cc(%eax) location. How can I check it? > So that 386/no-sse2 doesn't really have everyting to do with SSE2 > instruction per se, it simply excludes the above snippet and thus avoid > bug condition. It might be possible to avoid the bug in OpenSSL [is it > really important?]. Binutils upgrade might help [is it an option?]. Or > simply avoid -ggdb... A. It's all possible and bug is not critical for us. But it happens without -ggdb too. Thank you! -- SY, Dmitry Belyavsky (ICQ UIN 11116575) ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List openssl-dev@openssl.org Automated List Manager [EMAIL PROTECTED]
