xnu-792.24.17.tar.gz

[apple/xnu.git] / osfmk / i386 / read_fault.c

diff --git a/osfmk/i386/read_fault.c b/osfmk/i386/read_fault.c
index 17adc5879867d4a218feee8f169ced91dfeec580..67dc983589cf5f35648182dddf173c776b7707a7 100644 (file)
--- a/osfmk/i386/read_fault.c
+++ b/osfmk/i386/read_fault.c
@@ -1,24 +1,21 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
  * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
  * 
  * @APPLE_LICENSE_HEADER_END@
  */
@@ -87,20 +84,19 @@ intel_read_fault(
        vm_object_offset_t      offset;         /* Top-level offset */
        vm_prot_t               prot;           /* Protection for mapping */
        vm_behavior_t           behavior;       /* Expected paging behavior */
-       vm_object_offset_t      lo_offset, hi_offset;
+       vm_map_offset_t         lo_offset, hi_offset;
        vm_page_t               result_page;    /* Result of vm_fault_page */
        vm_page_t               top_page;       /* Placeholder page */
        boolean_t               wired;          /* Is map region wired? */
        kern_return_t           result;
        register vm_page_t      m;
-       vm_map_t                pmap_map;
+       vm_map_t                map_pmap;
        vm_map_t                original_map = map;
        thread_t                cur_thread;
        boolean_t               funnel_set;
-       funnel_t                *curflock;
+       funnel_t                *curflock = NULL;
 
        cur_thread = current_thread();
-
        if ((cur_thread->funnel_state & TH_FN_OWNED) == TH_FN_OWNED) {
                funnel_set = TRUE;
                curflock = cur_thread->funnel_lock;
@@ -121,7 +117,7 @@ intel_read_fault(
        result = vm_map_lookup_locked(&map, vaddr, VM_PROT_READ, &version,
                                      &object, &offset, &prot, &wired,
                                      &behavior, &lo_offset, 
-                                     &hi_offset, &pmap_map);
+                                     &hi_offset, &map_pmap);
        
        vm_map_unlock_read(map);
 
@@ -131,9 +127,9 @@ intel_read_fault(
                return (result);
        }
 
-       if(pmap_map != map) {
-               vm_map_reference(pmap_map);
-               vm_map_unlock_read(pmap_map);
+       if(map_pmap != map) {
+               vm_map_reference(map_pmap);
+               vm_map_unlock_read(map_pmap);
        }
 
        /*
@@ -153,8 +149,8 @@ intel_read_fault(
 
        if (result != VM_FAULT_SUCCESS) {
            vm_object_deallocate(object);
-           if(pmap_map != map) {
-                       vm_map_deallocate(pmap_map);
+           if(map_pmap != map) {
+                       vm_map_deallocate(map_pmap);
           }
 
            switch (result) {
@@ -212,8 +208,8 @@ intel_read_fault(
            vm_object_offset_t  retry_offset;
            vm_prot_t           retry_prot;
 
-               if (map != pmap_map) {
-                       vm_map_deallocate(pmap_map);
+               if (map != map_pmap) {
+                       vm_map_deallocate(map_pmap);
                }
            
                map = original_map;
@@ -222,7 +218,7 @@ intel_read_fault(
            result = vm_map_lookup_locked(&map, vaddr, VM_PROT_READ, &version,
                                &retry_object, &retry_offset, &retry_prot,
                                &wired, &behavior, &lo_offset, 
-                               &hi_offset, &pmap_map);
+                               &hi_offset, &map_pmap);
 
            if (result != KERN_SUCCESS) {
                vm_map_unlock_read(map);
@@ -234,8 +230,8 @@ intel_read_fault(
                        return (result);
            }
 
-               if (map != pmap_map) {
-                       vm_map_reference(pmap_map);
+               if (map != map_pmap) {
+                       vm_map_reference(map_pmap);
                }
 
            vm_object_unlock(retry_object);
@@ -244,9 +240,9 @@ intel_read_fault(
                        vm_object_lock(m->object);
                        RELEASE_PAGE(m);
                vm_map_unlock_read(map);
-               if(pmap_map != map) {
-                               vm_map_unlock_read(pmap_map);
-                               vm_map_deallocate(pmap_map);
+               if(map_pmap != map) {
+                               vm_map_unlock_read(map_pmap);
+                               vm_map_deallocate(map_pmap);
                        }
                        UNLOCK_AND_DEALLOCATE;
                        goto RetryFault;
@@ -257,11 +253,11 @@ intel_read_fault(
         *      Put the page in the physical map.
         */
 
-       PMAP_ENTER(pmap_map->pmap, vaddr, m, VM_PROT_READ, PMAP_DEFAULT_CACHE, wired);
+       PMAP_ENTER(map_pmap->pmap, vaddr, m, VM_PROT_READ, PMAP_DEFAULT_CACHE, wired);
 
-       if(pmap_map != map) {
-               vm_map_unlock_read(pmap_map);
-               vm_map_deallocate(pmap_map);
+       if(map_pmap != map) {
+               vm_map_unlock_read(map_pmap);
+               vm_map_deallocate(map_pmap);
        }
        
        vm_object_lock(m->object);