[openssl-users] Unhandled exception at 0x005904dc (libeay32.dll) (Windows x86)

Scott Ware wsware at gmail.com
Mon Aug 22 18:09:16 UTC 2016

We use libeay32.dll and ssleay32.dll from
https://slproweb.com/products/Win32OpenSSL.html in 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

Scott Ware

Unhandled exception at 0x005904dc (libeay32.dll) in Test.exe: 0xC000001D:
Illegal Instruction.
            if (netstatget(NULL, L"LanmanWorkstation", 0, 0, &outbuf) == 0)
005904B6  lea         edx,[outbuf]
005904BC  push        edx
005904BD  push        0
005904BF  push        0
005904C1  push        offset string L"LanmanWorkstation" (629C8Ch)
005904C6  push        0
005904C8  call        dword ptr [netstatget]
005904CE  test        eax,eax
005904D0  jne         RAND_poll+16Ah (59050Ah)
                RAND_add(outbuf, sizeof(STAT_WORKSTATION_0), 45);
005904D2  mov         eax,8
005904D7  call        _chkstk (611F20h)
=>005904DC  movsd       xmm0,mmword ptr [__real at 4046800000000000 (629E90h)]
005904E4  movsd       mmword ptr [esp],xmm0
005904E9  push        0D8h
005904EE  mov         eax,dword ptr [outbuf]
005904F4  push        eax
005904F5  call        RAND_add (58FF10h)
005904FA  add         esp,10h
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