crash on priviledged instruction

[Stefan Leichter]

Andreas Mohr Usenet 10/01 wrote:

> Stefan Leichter <Stefan.Leichter at camline.com> wrote:

>> 080689b8:08243b48: exception code=c0000096
>> Unhandled exception: priviledged instruction in 16-bit code (050f:1006).
>> In 16-bit mode.
>> 0x050f:0x1006: lesw  %es:0x0(%si),%si
>> Wine-dbg>quit
> 
> Huh ??
> les si is in no way a privileged instruction !!
> 
> Could it be that a segment register is zeroed out in this case ?
> ("info reg")
> 
Good shot!

080689b8:08244058: exception code=80000003
080689b8:08243f38: exception code=c0000096
Unhandled exception: priviledged instruction in 16-bit code (050f:1006).
In 16-bit mode.
0x050f:0x1006: lesw     %es:0x0(%si),%si
Wine-dbg>info reg
Register dump:
 CS:050f SS:09c7 DS:09c7 ES:0000 FS:0000 GS:0000
 IP:1006 SP:89a4 BP:89bc FLAGS:0246(   - 00  I  Z- -P1 )
 AX:002c BX:0058 CX:0000 DX:0000 SI:0000 DI:89d0
Wine-dbg>quit

The question now is: Where do the SI register become NULL? Is it a good 
choice to extend the relay logging by the register e.g. ES and SI? Or is it 
more likely that the code where the register becomes initialized is skipped?

Tschüß Stefan