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Re: Savannah task 5878 - port user_gdt

From: Barry deFreese
Subject: Re: Savannah task 5878 - port user_gdt
Date: Sat, 4 Nov 2006 20:14:08 -0500

----- Original Message ----- From: "Barry deFreese" <bddebian@comcast.net>
To: <bug-hurd@gnu.org>
Sent: Tuesday, October 31, 2006 10:55 PM
Subject: Re: Savannah task 5878 - port user_gdt

----- Original Message ----- From: "Samuel Thibault" <samuel.thibault@ens-lyon.org>
To: "Barry deFreese" <bddebian@comcast.net>
Cc: <bug-hurd@gnu.org>
Sent: Monday, October 30, 2006 3:54 AM
Subject: Re: Savannah task 5878 - port user_gdt


Barry deFreese, le Sun 29 Oct 2006 22:30:12 -0500, a écrit :
I finally think I have the i386_{get,set}_gdt stuff from oskit ported into
the gnumach branch.  I haven't tested the gdt functionality but it does
build and boot.

See my comments below.

diff -Nurp gnumach-1-10292006.org/i386/i386/gdt.h gnumach-1-10292006/gnumach/i386/i386/gdt.h --- gnumach-1-10292006.org/i386/i386/gdt.h 2006-10-29 18:26:18.000000000 +0000 +++ gnumach-1-10292006/gnumach/i386/i386/gdt.h 2006-10-29 19:49:34.000000000 +0000
@@ -59,7 +59,9 @@
    to allocate */
#define GDTSZ           0x300           /* size of gdt table */
#else   /* PS2 */
-#define GDTSZ 11
+#define USER_GDT 0x48
+#define GDTSZ (0x80/8)
+#define USER_GDT_SLOTS 2
#endif  /* PS2 */

As I told you on irc, GDTS should be increased to 13, (because it was 11
and we're adding 2 slots), not 0x80/8 (which makes 16).

Else it looks fine.  This of course needs a few tests before committing.


OK, I'm trying to do some testing and not having much luck. However, I also noticed that i386_{get,set}_gdt is not getting in mach_i386.h. What am I missing there? Do I need to do some MiG magic to get it from mach_i386.defs to mach_i386.h?


Barry deFreese (aka bddebian)

OK thanks to Samuels patience and help, I have an improved patch that does work and has been moderately tested.


Barry deFreese (aka bddebian)

Attachment: gnumach_i386_gdt.diff
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