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<H1>[Mono-list] P/Invoke on amd64 was :Marshalling problems
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<B>James Fitzsimons
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<A HREF="mailto:james.fitzsimons%40gmail.com"
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TITLE="[Mono-list] P/Invoke on amd64 was :Marshalling problems">james.fitzsimons@gmail.com
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<I>Sun, 13 Feb 2005 10:44:20 +0000</I>
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<PRE>--=-z0W7DHZJCk7V7N1GGWit
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Hi Jonathan, Michal,
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On Sat, 2005-02-12 at 22:52, Jonathan Pryor wrote:
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The question becomes whether or not your programs are 32-bit or 64-bit
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><i> programs, and ditto for your library.
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</I>><i>=20
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</I>><i> Running "file" and "ldd" on your programs and your libraries would help.
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</I>Ok, firstly running file and ldd on the Curses program example in my
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last email:
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ file -k /lib64/libncurses.so.5.4=20
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/lib64/libncurses.so.5.4: ELF 64-bit LSB shared object, AMD x86-64,
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version 1 (SYSV), stripped
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ file -k Curses.exe
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Curses.exe: MS Windows PE 32-bit Intel 80386 console executable\012-
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MS-DOS executable (EXE), OS/2 or MS Windows
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ file /usr/local/bin/mono
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/usr/local/bin/mono: ELF 64-bit LSB executable, AMD x86-64, version 1
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(SYSV), for GNU/Linux 2.4.1, dynamically linked (uses shared libs), not
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stripped
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Now for the actual libraries I am trying to use in my real program:
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ file -k /usr/local/lib/libhighgui-0.9.so.5.0.0=20
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/usr/local/lib/libhighgui-0.9.so.5.0.0: ELF 64-bit LSB shared object,
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AMD x86-64, version 1 (SYSV), not stripped
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ file -k /usr/local/lib/libopencv-0.9.so.5.0.0 =20
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/usr/local/lib/libopencv-0.9.so.5.0.0: ELF 64-bit LSB shared object, AMD
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x86-64, version 1 (SYSV), not stripped
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(this is a C program which uses the above libraries just fine)
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<A HREF="mailto:james@athos">james@athos</A> objRec $ file -k objectRecognition
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objectRecognition: ELF 64-bit LSB executable, AMD x86-64, version 1
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(SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not
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stripped
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Finally, you should try running mono with MONO_LOG_LEVEL=3Dinfo and
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><i> MONO_lOG_MASK=3Ddll.
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</I>When I try to run the curses example with logging on I get the following:
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Mono-INFO: DllImport loading: 'libncurses'.
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Mono-INFO: DllImport error loading library '/usr/lib/libncurses.so:
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invalid ELF header'.
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(Curses.exe:10129): Mono-WARNING **: DllImport unable to load library
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'/usr/lib/libncurses.so: invalid ELF header'.
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And with my open computer vision program:
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Mono-INFO: DllImport loading: 'libopencv'.
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Mono-INFO: DllImport error loading library '/usr/local/lib/libopencv.so:
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undefined symbol: __gxx_personality_v0'.
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(CvImage.exe:16545): Mono-WARNING **: DllImport unable to load library
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'/usr/local/lib/libopencv.so: undefined symbol: __gxx_personality_v0'.
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So, it looks like mono finds the libncurses library, but can't load it
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for some reason, like wise with the opencv library. The error message is
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a bit miss leading in this case. I still don't know how to fix the
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problem though.
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On Sun, 2005-02-13 at 01:03, Michal Moskal wrote:
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><i> The example works for me without any problems, some other info:
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</I>Ok this is strange...I wonder what is different between your environment
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and mine that it doesn't work on mine?
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><i> [<A HREF="mailto:malekith@r64">malekith@r64</A> 07-pinvoke]$ ldd =3Dmono
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</I>><i> libgthread-2.0.so.0 =3D> /usr/lib64/libgthread-2.0.so.0
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</I>><i> (0x0000002a9566c000)
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</I>><i> libgmodule-2.0.so.0 =3D> /usr/lib64/libgmodule-2.0.so.0
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</I>><i> (0x0000002a95770000)
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</I>><i> libdl.so.2 =3D> /lib64/libdl.so.2 (0x0000002a95874000)
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</I>><i> libglib-2.0.so.0 =3D> /usr/lib64/libglib-2.0.so.0 (0x0000002a9597=
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</I>7000)
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><i> libnsl.so.1 =3D> /lib64/libnsl.so.1 (0x0000002a95afc000)
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</I>><i> libpthread.so.0 =3D> /lib64/tls/libpthread.so.0 (0x0000002a95c130=
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</I>00)
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><i> libm.so.6 =3D> /lib64/tls/libm.so.6 (0x0000002a95d28000)
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</I>><i> librt.so.1 =3D> /lib64/tls/librt.so.1 (0x0000002a95eac000)
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</I>><i> libc.so.6 =3D> /lib64/tls/libc.so.6 (0x0000002a95fb6000)
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</I>><i> /lib64/ld-linux-x86-64.so.2 (0x0000002a95556000)
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</I><A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ ldd /usr/local/bin/mono
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libgthread-2.0.so.0 =3D> /usr/lib/libgthread-2.0.so.0
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(0x0000002a9566c000)
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libgmodule-2.0.so.0 =3D> /usr/lib/libgmodule-2.0.so.0
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(0x0000002a95770000)
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libdl.so.2 =3D> /lib/libdl.so.2 (0x0000002a9589b000)
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libglib-2.0.so.0 =3D> /usr/lib/libglib-2.0.so.0
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(0x0000002a9599e000)
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libnsl.so.1 =3D> /lib/libnsl.so.1 (0x0000002a95b22000)
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libpthread.so.0 =3D> /lib/libpthread.so.0 (0x0000002a95c39000)
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libm.so.6 =3D> /lib/libm.so.6 (0x0000002a95dce000)
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librt.so.1 =3D> /lib/librt.so.1 (0x0000002a95f54000)
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libc.so.6 =3D> /lib/libc.so.6 (0x0000002a9606e000)
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/lib64/ld-linux-x86-64.so.2 (0x0000002a95556000)
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $
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(remember on my system /lib, and /usr/lib) are symlinked to /lib64)
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><i> [<A HREF="mailto:malekith@r64">malekith@r64</A> 07-pinvoke]$ mono --version
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</I>><i> Mono JIT compiler version 1.1.4, (C) 2002-2004 Novell, Inc and
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</I>><i> Contributors. www.go-mono.com
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</I>><i> TLS: __thread
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</I>><i> GC: Included Boehm (with typed GC)
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</I>><i> SIGSEGV : normal
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</I>><i> Globalization: none
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</I><A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ mono --version
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Mono JIT compiler version 1.1.4.20050210, (C) 2002-2004 Novell, Inc and
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Contributors. www.go-mono.com
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TLS: __thread
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GC: Included Boehm (with typed GC)
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SIGSEGV : normal
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Globalization: none
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><i> [<A HREF="mailto:malekith@r64">malekith@r64</A> 07-pinvoke]$ uname -a
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</I>><i> Linux roke 2.6.10-0.96 #1 Sun Jan 9 06:11:03 CET 2005 x86_64 0 unknown PL=
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</I>D Linux
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<A HREF="mailto:james@athos">james@athos</A> 07-pinvoke $ uname -a
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Linux athos 2.6.9-gentoo-r14 #8 Sun Jan 30 08:53:55 UTC 2005 x86_64 AMD
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Athlon(tm) 64 Processor 3400+ AuthenticAMD GNU/Linux
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Thanks very much for your patience guys and thanks for any help you can
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provide!
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Cheers,
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James
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--=20
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It's 5.50 a.m.... Do you know where your stack pointer is ?
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