Re: Illegal op ff e8 2c in newer dosemu

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On Wed, 6 May 2015 11:16:18 -0400
Martin Hicks <mort@xxxxxxxx> wrote:

> Hello,
> 
> I'm trying to run the NewViews 1.41b accounting program, which has been
> happily working in dosemu / DR DOS v6.0 for years.  Now it gives an Illegal
> Op error and exits when trying to open the accounts books directory.
> 
> The machine is running ubuntu/x86_64, and NewViews works correctly up to
> package version dosemu_1.4.0+svn.1999-1 but the next package release
> does not work (dosemu_1.4.0.7+20130105+b028d3f-1).
> 
> The following excerpt from the boot.log was with the latest git tree from the
> 'devel' branch.  The Illegal Op is always the same, although the CPU exception
> code seems to vary depending on the release of dosemu.  Various parts of the
> application can be navigated through, but as soon as the directory containing
> the accounting books is selected the crash occurs.  I presume it is scanning
> the directory and opening files.
> 
> I tried various cpu emulation options.  I also found one similar crash report in
> the bug system that mentioned setting vm.mmap_min_addr to 0.  Neither
> option helped.
> 
> Excerpt from boot.log follows.
> The full Debug +a log is at http://www.bork.org/~mort/boot.log
> 
> Please let me know if any other info might help.
> Thanks,
> mh
> 
> !!! Illegal op ff e8 2c
> ==============================================================
> CPU exception 0x0d err=0x00000000 cr2=00013aee eip=00472bda
> ==============================================================
> ERROR: unexpected CPU exception 0x0d err=0x00000000 cr2=00013aee while
> in vm86 (DOS)
> 
> Program=sigsegv.c, Line=200
> EIP: 04f5:0000460f ESP: 23a9:000039e2  VFLAGS(b): 00000 00110111 00000110
> EAX: 00008400 EBX: 00000012 ECX: 00006662 EDX: 00000000 VFLAGS(h): 00003706
> ESI: 0000274f EDI: 0000069d EBP: 000039f6 DS: 274f ES: 0288 FS: 0000 GS: 0000
> FLAGS: PF TF IF DF RF VM VIF  IOPL: 3
> STACK: 80 c0 4f 27 9d 06 f6 39 4f 27 -> 00 00 f5 04 88 02 46 32 2c 03
> OPS  : 0e 0a 00 00 89 0e 0c 0a e9 52 -> ff e8 2c 01 c7 06 06 0a 0e 00
>         ffe8                04f5:460f jmp  far ax
> 
> -- 
> Martin Hicks P.Eng.      |         mort@xxxxxxxx
> Bork Consulting Inc.     |   +1 (613) 266-2296
> --
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Hi Martin,
	I think you'll need to report this over at http://sourceforge.net/p/dosemu/bugs/ as this list is very quiet these days, especially for development.

Hope it helps,

Andrew



-- 
Andrew Bird <ajb@xxxxxxxxxxxxxxxxxxx>
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