Mercurial > illumos > illumos-gate

diff usr/src/uts/intel/ia32/os/archdep.c @ 1217:f95ffdc997b7

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6219276 need per-process equivalent of device context 6244042 x86 kernels do not need default LDTs 6308413 sysi86(SI86DSCR) rejects the first valid custom descriptor #6 with errno 6308413 contributed by Juergen Keil <jk@tools.de>
author rab
date Fri, 06 Jan 2006 10:19:31 -0800
parents 68f95e015346
children f74a135872bc
line wrap: on
line diff
--- a/usr/src/uts/intel/ia32/os/archdep.c	Fri Jan 06 09:41:00 2006 -0800
+++ b/usr/src/uts/intel/ia32/os/archdep.c	Fri Jan 06 10:19:31 2006 -0800
@@ -20,7 +20,7 @@
  * CDDL HEADER END
  */
 /*
- * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
@@ -633,7 +633,11 @@
 	}
 
 	/*
-	 * Force it into the LDT in ring 3 for 32-bit processes.
+	 * Force it into the LDT in ring 3 for 32-bit processes, which by
+	 * default do not have an LDT, so that any attempt to use an invalid
+	 * selector will reference the (non-existant) LDT, and cause a #gp fault
+	 * for the process.
+	 *
 	 * 64-bit processes get the null gdt selector since they
 	 * are not allowed to have a private LDT.
 	 */