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Date:      Sun, 14 Apr 2013 18:36:30 +0000 (UTC)
From:      "Cherry G. Mathew" <cherry@FreeBSD.org>
To:        src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject:   svn commit: r249483 - projects/amd64_xen_pv/sys/amd64/xen
Message-ID:  <201304141836.r3EIaUNd084027@svn.freebsd.org>
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Author: cherry
Date: Sun Apr 14 18:36:30 2013
New Revision: 249483
URL: http://svnweb.freebsd.org/changeset/base/249483

Log:
  Fix return to usermode codepath.
  
  Approved by: gibbs(implicit)

Modified:
  projects/amd64_xen_pv/sys/amd64/xen/exception.S
  projects/amd64_xen_pv/sys/amd64/xen/machdep.c

Modified: projects/amd64_xen_pv/sys/amd64/xen/exception.S
==============================================================================
--- projects/amd64_xen_pv/sys/amd64/xen/exception.S	Sun Apr 14 18:12:40 2013	(r249482)
+++ projects/amd64_xen_pv/sys/amd64/xen/exception.S	Sun Apr 14 18:36:30 2013	(r249483)
@@ -517,6 +517,7 @@ ENTRY(fork_trampoline)
 	DO_AST_MAYBE		;
 	RESTORE_GENERAL_REGS	;
 	RESTORE_SEGMENT_REGS	;
+	TRAP_FRAME_EXIT_NOERR   ;
 	INTR_EXIT		;
 
 IDTVEC(hypervisor_callback)	/* Xen only */

Modified: projects/amd64_xen_pv/sys/amd64/xen/machdep.c
==============================================================================
--- projects/amd64_xen_pv/sys/amd64/xen/machdep.c	Sun Apr 14 18:12:40 2013	(r249482)
+++ projects/amd64_xen_pv/sys/amd64/xen/machdep.c	Sun Apr 14 18:36:30 2013	(r249483)
@@ -1,7 +1,7 @@
 /* $FreeBSD$ */
 
 /*-
- * Copyright (c) 2012 Spectra Logic Corporation
+ * Copyright (c) 2012, 2013 Spectra Logic Corporation
  * All rights reserved.
  *
  * Portions of this software were developed by
@@ -175,7 +175,7 @@ setup_gdt(struct user_segment_descriptor
 #endif /* 0 */
 		case GUFS32_SEL:
 		case GUGS32_SEL:
-		case GUDATA_SEL:
+		case GUDATA_SEL: /* XXX: why def32 ? */
 			limit = 0xfffff;
 			type = SDT_MEMRWA;
 			dpl = SEL_UPL;
@@ -184,6 +184,15 @@ setup_gdt(struct user_segment_descriptor
 			gran = 1;
 			break;
 
+		case GUCODE_SEL:
+			limit = 0xfffff;
+			type = SDT_MEMERA;
+			dpl = SEL_UPL;
+			p = 1;
+			l = 1;
+			gran = 1;
+			break;
+
 		case GCODE_SEL:
 			limit = 0xfffff;
 			type = SDT_MEMERA;

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