On Sat, Jan 30, 2010 at 12:04:29AM +0100, Stefan Weil wrote: > Edgar E. Iglesias schrieb: > > On Fri, Jan 29, 2010 at 09:04:58AM -0800, Richard Henderson wrote: > >> On 01/28/2010 05:55 PM, identifier scorpio wrote: > >>> Your code is more skilled and I learn a lot from it, but I haven't yet > >>> recognized the key difference between your version and mine. In last > >>> mail, you've said that "Mainly, tcg_target_long was used places that > >>> could be holding HOST values, which means that the host values would > >>> have been truncated to 32 bits.", and I can't fully understand it, may > >>> you put it more clearly. > >> It was a mis-statement made while tired. Of course tcg_target_long is > >> defined to int64_t when TCG_TARGET_REG_BITS == 64, so there was no > >> truncation to 32 bits. > >> > >> Have you tested of any of the other embedded targets? You may be able > >> to find the error with one of those easier than finding it emulating > >> full-scale Windows. See the images at the bottom of the QEMU download > >> page. > > > > Hi, > > > > Although I've never hacked on a TCG backend I'd still like to give some > > advice. > > > > >From experience when developing both the CRIS and the MicroBlaze ISA > > translators I very much suggest getting something very stable to work > > in linux-user before going further. > > > > I used GCC's C torture tests and OpenSSL's bignum tests to verify the > > ports. In particular, OpenSSL's bignum tests seem to excersice lot's of > > cornercases. > > > > If you pass those, you've come a long way. In general it's much easier > > to debug a guest testcase (bntest, etc) that fails compared to huge > > propretiary blob that fails (windows). > > > > Just a suggestion, hope it helps. > > > > Cheers, > > Edgar > > > Hi Edgar, > > that was a good suggestion. bntest raises a segmentation fault > (NULL pointer, p == 0, see below) with qemu-x86_64 on a x86_64 host. > > Regards, > Stefan > > obase=16 > ibase=16 > test BN_add > print "test BN_add\n"
Hi Stefan, I didn't expect x86_64 to bug out so fast. But, like I said. The bignum tests are not a game. That testsuite is a serious thing to pass. Both CRIS and MicroBlaze pass them both in linux-user and in system emul. If not let me know. Cheers, Edgar
