Path: utzoo!attcan!uunet!lll-winken!uwm.edu!cs.utexas.edu!execu!sequoia!uudell!loft386!dsuvax!ghelmer
From: ghelmer@dsuvax.uucp (Guy Helmer)
Newsgroups: comp.os.minix
Subject: Receiving General Protection panic from 386 Minix
Keywords: general protection 386
Message-ID: <1990Sep22.055445.15470@dsuvax.uucp>
Date: 22 Sep 90 05:54:45 GMT
Organization: Dakota State University
Lines: 27

I just built the 386 version of MINIX, and I've been searching for
the source of this error for several hours now.  I receive a
general protection from process number 1, pc = 0x0007:0x00000385
and the friendly "Kernel panic: exception in kernel, mm, or fs"
message immediately after pressing the '=' key at the boot menu.
I'm trying to run this without shoelace or db.

I've tried this on two very different 386 boxes with identical
results from both, so I must have done something wrong while
building the system.  I've re-built the kernel several times,
as well as the various tools (build, init, bootblok).  bootblok
has the patches to copy itself very high in memory before loading
the rest of the o/s, so I don't believe it's related to the tools.

For the gurus that have built 386 kernels that work, am I right
in believing that the code segment of the above address (0x0007)
is the segment descriptor for the BIOS code segment that the
BIOS uses in INT 0x15 function 0x89?  Right now I think perhaps
a GDT entry isn't being set up correctly, but that's an
uneducated guess :-(

Thanks for any help!
-- 
Guy Helmer
work: DSU Computing Services, Business & Education Institute    (605) 256-5315
play: MidIX System Support Services                             (605) 256-2788
helmer@sdnet.bitnet, ghelmer@dsuvax.uucp, uunet!loft386!dsuvax!ghelmer