On Sun, 12 Mar 2000, Ove Kaaven wrote:
>
> On Sun, 12 Mar 2000 [EMAIL PROTECTED] wrote:
>
> > Anybody have handy an op-code/postbyte map for x86?
>
> And debugger/db_disasm.c isn't good enough, you mean?
> Something is probably available from the Intel website too...
I'm sure it's fine. Sometimes I just like to get a machine's-eye look
at things :-).
>
> > If you want
> > to give a lesson on why lcall is a privileged instruction in 16 bit
> > mode, Ulrich, that would be good too, but without an opcode/postbyte
map
> > I am not sure what an lcall is :-).
>
> lcall is "long call" (inter-section call), usually known as a far call.
It
> isn't privileged (unless the code segment called isn't a
ring-3-accessible
> code segment or call gate, of course). Most likely you encountered an
> indirect call using an invalid address. It's probably a bit misleading
for
> Wine to call any GPF a "privileged instruction" even when it's only
> something like a null pointer dereference.
Better than a message box :-).
>
> > I would be glad of a pointer to
> > something like the Principles of Operation fox ix86 if such exists,
too.
>
> Well, I found this a while ago when looking for a "cmpxchg"
description:
> http://webster.cs.ucr.edu/Page_asm/ArtofAssembly/ArtofAsm.html
>
Thanks! I'll send www4mail after it.
Lawson
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