Hi list, just to let you know that this did the trick : install glib on my development machine without the AVX instructions (-mno-avx), and build fluidsynth/fluidXtra against it. Thank you for your help Antoine
Le 23 août 2013 à 18:10, Element Green <jgr...@users.sourceforge.net> a écrit : > Sounds like you're onto something there. I was not aware of VEX-prefixed AVX > instructions. I thought it seemed a little fishy that the LDS instruction > would be used in that disassembly dump and also that it appeared that the > actual instruction was 8 bytes long from your successful single stepping of > the code. From reading the Wikipedia article on the subject, it definitely > sounds like what you are experiencing. If I understood what I read > correctly, 32-bit versus 64-bit mode can have an effect on which instructions > are valid, regardless of whether the processor supports 64 bit or not. So if > you're kernel is running in 32 bit mode, then certain AVX instructions will > be interpreted differently than if the kernel is running 64 bit. > > http://en.wikipedia.org/wiki/VEX_prefix > > Best regards, > > Element > > > On Fri, Aug 23, 2013 at 4:57 AM, a...@gratin.org <a...@gratin.org> wrote: > well, > I installed glib as --universal, meaning that it contains both 32 bits and 64 > bits binaries. And actually, I removed the 64 bit binary (using the lipo > function), because Director is a 32 bits application and all Xtras (plugins) > are also. So we are really running in 32 bit here. Even on MacOSX10.8, which > is a 64 bits kernel, but which can run 32 bits applications. > > And, this instruction does _not_ crash on my MacOSX10.8 machine, and _does_ > crash on another MacOSX10.8 machine. > > I found another possibility : AVX. I found on the net > (http://stackoverflow.com/questions/16389207/llvm-jit-tutorial-code-crashes-with-simple-parameterized-function-why) > a similar SIGILL LDS, which was actually caused by an VEX-prefixed AVX > instruction, which neither the processor nor the disassembler knew about, and > interpreted as an LDS. And AVX is available on my machine, and not on the two > crashing machines… > > I'm investigating this now. Trying to compile glib without AVX. > > Le 23 août 2013 à 00:59, Element Green <jgr...@users.sourceforge.net> a écrit > : > >> From what I can see, that instruction is indeed an LDS instruction, which >> from what I read is invalid when in 64 bit mode. It sounds like Mac OSX can >> be run in either 32 bit or 64 bit mode, so perhaps that is the difference >> between working systems and non-working systems? I didn't bother decoding >> the instruction further than seeing that it was an LDS instruction. If that >> is indeed what is happening, then some sort of compiler setting resulted in >> that instruction. Probably need to make sure the proper compiler switches >> are being used for the intended architectures. >> > > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev > > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev
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