Hello I'm running DOSEMU on Ubuntu 10.10 (AMD64). One of my application I use crashes with an "Invalid Opcode at..." when loaded. DOSEMU and "strace" reports the following:
!!! Illegal op f0 ff 07 ============================================================== CPU exception 0x06 err=0x00000000 cr2=0009ce54 eip=0000c02b ============================================================== SIGILL while in vm86(): 11fe:a04b write(4, "!!! Illegal op f0 ff 07\n", 24) = 24 write(4, "================================"..., 63) = 63 write(4, "CPU exception 0x06 err=0x0000000"..., 60) = 60 write(4, "================================"..., 63) = 63 write(4, "SIGILL while in vm86(): 11fe:a04"..., 34) = 34 DEBUG tells me, that the instruction "f0 ff 07" is "LOCK INC WORD PTR [BX]". If I replace the LOCK prefix with a NOOP (-> "90 ff 07"), the illegal op and SIGILL don't occurs, but the application crashes (which has been foreseeable). I tried every combination with "$_cpu" and "$_cpu_emu". Because I'm on AMD64, I can't disable the CPU emulation. But even with "fullsim", the illegal op occurs. I tried this with the package from Ubuntu and a self compiled version from "1.4.0.1". Why is the LOCK prefix generating an illegal op, even in "fullsim" mode ? Is this op not supported by design ? If someone like to try it out, I can provide more information like download link and install instructions for the application I use. Andreas ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Dosemu-devel mailing list Dosemu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dosemu-devel
