On Mon, Aug 22, 2016 at 3:04 PM, Jakob Bohm <jb-openssl at wisemo.com> wrote: > On 22/08/2016 20:09, Scott Ware wrote: > >> We use libeay32.dll and ssleay32.dll from https://slproweb.com/products/ >> Win32OpenSSL.htmlin our applications and we recently moved from version >> 1.0.2a to 1.0.2g and now on a few machines running a AMD Geode processor we >> are getting "Unhandled exception at 0x005904dc (libeay32.dll) in Test.exe: >> 0xC000001D: Illegal Instruction". We ended up building OpennSSL so we could >> debug into it and found it is failing on "movsd xmm0,mmword" (see below) >> which the AMD Geode does not seem to support. I have tried "SET >> OPENSSL_ia32cap=~0x1000000", "SET OPENSSL_ia32cap=~0x2000000", and "SET >> OPENSSL_ia32cap=~0x7000000"; and nothing seems to change. I may not be >> using OPENSSL_ia32cap correctly. This happens when calling SSL_CTX_new >> which then calls RAND_add. >> >> Any ideas on the best thing to do? We don't want to have to manage >> different compiled versions of libeay32.dll and ssleay32.dll if we can help >> it. >> >> Your disassembly looks like the C compiler was invoked with > options that caused regular C floating point code (in this > case, the passing of 45.0 as an argument to RAND_add()) to > be compiled into MMX/SSE instructions instead of backwards > compatible 80x87 floating point instructions or (for simple > cases like this) regular integer unit data movement > instructions (such as two pushes of 32 bit constants that > contain the halves of the 64 bit double constant, which > would have been more efficient on every x86 CPU). > > Did the build scripts or other source code contain any > differences from the official source code that can be > downloaded from openssl.org? > > How did you invoke the build scripts (command sequence, > special build environment, special environment variables > etc.)? > > Which compiler and compiler version/edition did you use? > > It would be interesting to know if one of the common Windows > compilers does this unconditionally, making it unsuitable > for use in programs that need to be backwards compatible. > > > I compiled using this process and seem to be getting the same result as the .dll I downloaded from slproweb.com I downloaded the 1.0.2g source from openssl.com and didn't change anything. >From the "Developer Command Promt for VS2013" perl Configure debug-VC-WIN32 no-asm --prefix=C:\OpenSSL-VC-32-dbg ms\do_ms nmake -f ms\ntdll.mak nmake -f ms\ntdll.mak install -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20160822/1e5d5658/attachment.html>
