Enable vmspace sharing on SMP. Major changes are,

- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/i386/i386/db_interface.c b/sys/i386/i386/db_interface.c
index 7f01f1d735e6..29985971b51a 100644
--- a/sys/i386/i386/db_interface.c
+++ b/sys/i386/i386/db_interface.c
@@ -23,7 +23,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- *	$Id: db_interface.c,v 1.42 1998/12/14 05:34:33 dillon Exp $
+ *	$Id: db_interface.c,v 1.43 1998/12/28 23:02:56 msmith Exp $
  */
 
 /*
@@ -202,6 +202,7 @@ kdb_trap(type, code, regs)
 	regs->tf_esi    = ddb_regs.tf_esi;
 	regs->tf_edi    = ddb_regs.tf_edi;
 	regs->tf_es     = ddb_regs.tf_es & 0xffff;
+	regs->tf_fs     = ddb_regs.tf_fs & 0xffff;
 	regs->tf_cs     = ddb_regs.tf_cs & 0xffff;
 	regs->tf_ds     = ddb_regs.tf_ds & 0xffff;
 	return (1);