xnu-6153.121.1.tar.gz

[apple/xnu.git] / osfmk / mach / vm_region.h

diff --git a/osfmk/mach/vm_region.h b/osfmk/mach/vm_region.h
index f77c731daebdbb69b586e5689fbb2971c6a532b8..21abcad6e55e1388a3370a0f5a3927bd13636793 100644 (file)
--- a/osfmk/mach/vm_region.h
+++ b/osfmk/mach/vm_region.h
@@ -1,17 +1,20 @@
 /*
 /*

- * Copyright (c) 2002,2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 

  * 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
  * 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.
- * 
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * 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
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The 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,


@@ -19,8 +22,8 @@
  * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -32,13 +35,27 @@
  *
  */
 
  *
  */
 

-#ifndef        _MACH_VM_REGION_H_
+#ifndef _MACH_VM_REGION_H_

 #define _MACH_VM_REGION_H_
 
 #include <mach/boolean.h>
 #include <mach/vm_prot.h>
 #include <mach/vm_inherit.h>
 #include <mach/vm_behavior.h>
 #define _MACH_VM_REGION_H_
 
 #include <mach/boolean.h>
 #include <mach/vm_prot.h>
 #include <mach/vm_inherit.h>
 #include <mach/vm_behavior.h>

+#include <mach/vm_types.h>
+#include <mach/message.h>
+#include <mach/machine/vm_param.h>
+#include <mach/machine/vm_types.h>
+#include <mach/memory_object_types.h>
+
+#include <sys/cdefs.h>
+
+#pragma pack(push, 4)
+
+// LP64todo: all the current tools are 32bit, obviously never worked for 64b
+// so probably should be a real 32b ID vs. ptr.
+// Current users just check for equality
+typedef uint32_t vm32_object_id_t;

 
 /*
  *     Types defined:
 
 /*
  *     Types defined:


@@ -47,57 +64,58 @@
  */
 
 #define VM_REGION_INFO_MAX      (1024)
  */
 
 #define VM_REGION_INFO_MAX      (1024)

-typedef int    *vm_region_info_t;
-typedef int    *vm_region_info_64_t;
-typedef int    *vm_region_recurse_info_t;
-typedef int    *vm_region_recurse_info_64_t;
-typedef int     vm_region_flavor_t;
-typedef int     vm_region_info_data_t[VM_REGION_INFO_MAX];
-
-#define VM_REGION_BASIC_INFO   10
-
+typedef int     *vm_region_info_t;
+typedef int     *vm_region_info_64_t;
+typedef int     *vm_region_recurse_info_t;
+typedef int     *vm_region_recurse_info_64_t;
+typedef int      vm_region_flavor_t;
+typedef int      vm_region_info_data_t[VM_REGION_INFO_MAX];
+
+#define VM_REGION_BASIC_INFO_64         9

 struct vm_region_basic_info_64 {
 struct vm_region_basic_info_64 {

-       vm_prot_t               protection;
-       vm_prot_t               max_protection;
-       vm_inherit_t            inheritance;
-       boolean_t               shared;
-       boolean_t               reserved;
-       vm_object_offset_t      offset;
-       vm_behavior_t           behavior;
-       unsigned short          user_wired_count;
+       vm_prot_t               protection;
+       vm_prot_t               max_protection;
+       vm_inherit_t            inheritance;
+       boolean_t               shared;
+       boolean_t               reserved;
+       memory_object_offset_t  offset;
+       vm_behavior_t           behavior;
+       unsigned short          user_wired_count;

 };
 };

+typedef struct vm_region_basic_info_64          *vm_region_basic_info_64_t;
+typedef struct vm_region_basic_info_64           vm_region_basic_info_data_64_t;

 
 

-typedef struct vm_region_basic_info_64         *vm_region_basic_info_64_t;
-typedef struct vm_region_basic_info_64          vm_region_basic_info_data_64_t;
-
-#define VM_REGION_BASIC_INFO_COUNT_64          \
-       (sizeof(vm_region_basic_info_data_64_t)/sizeof(int))
+#define VM_REGION_BASIC_INFO_COUNT_64   ((mach_msg_type_number_t) \
+       (sizeof(vm_region_basic_info_data_64_t)/sizeof(int)))

 
 

+/*
+ * Passing VM_REGION_BASIC_INFO to vm_region_64
+ * automatically converts it to a VM_REGION_BASIC_INFO_64.
+ * Please use that explicitly instead.
+ */
+#define VM_REGION_BASIC_INFO            10

 
 

+/*
+ * This is the legacy basic info structure.  It is
+ * deprecated because it passes only a 32-bit memory object
+ * offset back - too small for many larger objects (e.g. files).
+ */

 struct vm_region_basic_info {
 struct vm_region_basic_info {

-       vm_prot_t               protection;
-       vm_prot_t               max_protection;
-       vm_inherit_t            inheritance;
-       boolean_t               shared;
-       boolean_t               reserved;
-#ifdef soon
-       vm_object_offset_t      offset;
-#else
-       vm_offset_t     offset;
-#endif
-       vm_behavior_t           behavior;
-       unsigned short          user_wired_count;
+       vm_prot_t               protection;
+       vm_prot_t               max_protection;
+       vm_inherit_t            inheritance;
+       boolean_t               shared;
+       boolean_t               reserved;
+       uint32_t                offset; /* too small for a real offset */
+       vm_behavior_t           behavior;
+       unsigned short          user_wired_count;

 };
 
 };
 

-typedef struct vm_region_basic_info            *vm_region_basic_info_t;
-typedef struct vm_region_basic_info             vm_region_basic_info_data_t;
-
-#define VM_REGION_BASIC_INFO_COUNT             \
-       (sizeof(vm_region_basic_info_data_t)/sizeof(int))
-
+typedef struct vm_region_basic_info             *vm_region_basic_info_t;
+typedef struct vm_region_basic_info              vm_region_basic_info_data_t;

 
 

-
-#define VM_REGION_EXTENDED_INFO        11
+#define VM_REGION_BASIC_INFO_COUNT ((mach_msg_type_number_t) \
+       (sizeof(vm_region_basic_info_data_t)/sizeof(int)))

 
 #define SM_COW             1
 #define SM_PRIVATE         2
 
 #define SM_COW             1
 #define SM_PRIVATE         2


@@ -106,8 +124,9 @@ typedef struct vm_region_basic_info          vm_region_basic_info_data_t;
 #define SM_TRUESHARED      5
 #define SM_PRIVATE_ALIASED 6
 #define SM_SHARED_ALIASED  7
 #define SM_TRUESHARED      5
 #define SM_PRIVATE_ALIASED 6
 #define SM_SHARED_ALIASED  7

+#define SM_LARGE_PAGE      8

 
 

-/* 
+/*

  * For submap info,  the SM flags above are overlayed when a submap
  * is encountered.  The field denotes whether or not machine level mapping
  * information is being shared.  PTE's etc.  When such sharing is taking
  * For submap info,  the SM flags above are overlayed when a submap
  * is encountered.  The field denotes whether or not machine level mapping
  * information is being shared.  PTE's etc.  When such sharing is taking


@@ -115,46 +134,77 @@ typedef struct vm_region_basic_info                vm_region_basic_info_data_t;
  * back.
  */
 
  * back.
  */
 

+#ifdef MACH_KERNEL_PRIVATE
+#define VM_REGION_EXTENDED_INFO__legacy 11
+struct vm_region_extended_info__legacy {
+       vm_prot_t               protection;
+       unsigned int            user_tag;
+       unsigned int            pages_resident;
+       unsigned int            pages_shared_now_private;
+       unsigned int            pages_swapped_out;
+       unsigned int            pages_dirtied;
+       unsigned int            ref_count;
+       unsigned short          shadow_depth;
+       unsigned char           external_pager;
+       unsigned char           share_mode;
+       /*
+        * XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX
+        *  DO NOT EXTEND THIS DATA STRUCTURE.
+        *  IT IS NOW ABANDONED AND REPLACED WITH vm_region_extended_info BELOW.
+        * XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX XXX
+        */
+};
+#define VM_REGION_EXTENDED_INFO_COUNT__legacy               \
+       ((mach_msg_type_number_t)                           \
+        (sizeof (struct vm_region_extended_info__legacy) / \
+         sizeof (natural_t)))
+#endif /* MACH_KERNEL_PRIVATE */
+
+

 
 

+#define VM_REGION_EXTENDED_INFO 13

 struct vm_region_extended_info {
 struct vm_region_extended_info {

-       vm_prot_t               protection;
-        unsigned int            user_tag;
-        unsigned int            pages_resident;
-        unsigned int            pages_shared_now_private;
-        unsigned int            pages_swapped_out;
-        unsigned int            pages_dirtied;
-        unsigned int            ref_count;
-        unsigned short          shadow_depth;
-        unsigned char           external_pager;
-        unsigned char           share_mode;
+       vm_prot_t               protection;
+       unsigned int            user_tag;
+       unsigned int            pages_resident;
+       unsigned int            pages_shared_now_private;
+       unsigned int            pages_swapped_out;
+       unsigned int            pages_dirtied;
+       unsigned int            ref_count;
+       unsigned short          shadow_depth;
+       unsigned char           external_pager;
+       unsigned char           share_mode;
+       unsigned int            pages_reusable;

 };
 };

+typedef struct vm_region_extended_info          *vm_region_extended_info_t;
+typedef struct vm_region_extended_info           vm_region_extended_info_data_t;
+#define VM_REGION_EXTENDED_INFO_COUNT                   \
+       ((mach_msg_type_number_t)                       \
+        (sizeof (vm_region_extended_info_data_t) / sizeof (natural_t)))

 
 

-typedef struct vm_region_extended_info         *vm_region_extended_info_t;
-typedef struct vm_region_extended_info          vm_region_extended_info_data_t;

 
 

-#define VM_REGION_EXTENDED_INFO_COUNT          \
-       (sizeof(vm_region_extended_info_data_t)/sizeof(int))

 
 
 
 

-#define VM_REGION_TOP_INFO     12
+#define VM_REGION_TOP_INFO      12

 
 struct vm_region_top_info {
 
 struct vm_region_top_info {

-        unsigned int            obj_id;
-        unsigned int            ref_count;
-        unsigned int            private_pages_resident;
-        unsigned int            shared_pages_resident;
-        unsigned char           share_mode;
+       unsigned int            obj_id;
+       unsigned int            ref_count;
+       unsigned int            private_pages_resident;
+       unsigned int            shared_pages_resident;
+       unsigned char           share_mode;

 };
 
 };
 

-typedef struct vm_region_top_info              *vm_region_top_info_t;
-typedef struct vm_region_top_info               vm_region_top_info_data_t;
+typedef struct vm_region_top_info               *vm_region_top_info_t;
+typedef struct vm_region_top_info                vm_region_top_info_data_t;

 
 

-#define VM_REGION_TOP_INFO_COUNT               \
-       (sizeof(vm_region_top_info_data_t)/sizeof(int))
+#define VM_REGION_TOP_INFO_COUNT                                        \
+       ((mach_msg_type_number_t)                                       \
+        (sizeof(vm_region_top_info_data_t) / sizeof(natural_t)))

 
 
 
 
 
 

-/* 
+/*

  * vm_region_submap_info will return information on a submap or object.
  * The user supplies a nesting level on the call.  When a walk of the
  * user's map is done and a submap is encountered, the nesting count is
  * vm_region_submap_info will return information on a submap or object.
  * The user supplies a nesting level on the call.  When a walk of the
  * user's map is done and a submap is encountered, the nesting count is


@@ -171,74 +221,154 @@ typedef struct vm_region_top_info                 vm_region_top_info_data_t;
  *
  * Object only fields are filled in through a walking of the object shadow
  * chain (where one is present), and a walking of the resident page queue.
  *
  * Object only fields are filled in through a walking of the object shadow
  * chain (where one is present), and a walking of the resident page queue.

- * 
+ *

  */
  */

+

 struct vm_region_submap_info {
 struct vm_region_submap_info {

-       vm_prot_t               protection;     /* present access protection */
-       vm_prot_t               max_protection; /* max avail through vm_prot */
-       vm_inherit_t            inheritance;/* behavior of map/obj on fork */
-#ifdef soon
-       vm_object_offset_t      offset;         /* offset into object/map */
-#else
-       vm_offset_t     offset;         /* offset into object/map */
-#endif
-        unsigned int            user_tag;      /* user tag on map entry */
-        unsigned int            pages_resident;        /* only valid for objects */
-        unsigned int            pages_shared_now_private; /* only for objects */
-        unsigned int            pages_swapped_out; /* only for objects */
-        unsigned int            pages_dirtied;   /* only for objects */
-        unsigned int            ref_count;      /* obj/map mappers, etc */
-        unsigned short          shadow_depth;  /* only for obj */
-        unsigned char           external_pager;  /* only for obj */
-        unsigned char           share_mode;    /* see enumeration */
-       boolean_t               is_submap;      /* submap vs obj */
-       vm_behavior_t           behavior;       /* access behavior hint */
-       vm_offset_t             object_id;      /* obj/map name, not a handle */
-       unsigned short          user_wired_count; 
+       vm_prot_t               protection;     /* present access protection */
+       vm_prot_t               max_protection; /* max avail through vm_prot */
+       vm_inherit_t            inheritance;/* behavior of map/obj on fork */
+       uint32_t                offset;         /* offset into object/map */
+       unsigned int            user_tag;       /* user tag on map entry */
+       unsigned int            pages_resident; /* only valid for objects */
+       unsigned int            pages_shared_now_private; /* only for objects */
+       unsigned int            pages_swapped_out; /* only for objects */
+       unsigned int            pages_dirtied;   /* only for objects */
+       unsigned int            ref_count;       /* obj/map mappers, etc */
+       unsigned short          shadow_depth;   /* only for obj */
+       unsigned char           external_pager;  /* only for obj */
+       unsigned char           share_mode;     /* see enumeration */
+       boolean_t               is_submap;      /* submap vs obj */
+       vm_behavior_t           behavior;       /* access behavior hint */
+       vm32_object_id_t        object_id;      /* obj/map name, not a handle */
+       unsigned short          user_wired_count;

 };
 
 };
 

-typedef struct vm_region_submap_info           *vm_region_submap_info_t;
-typedef struct vm_region_submap_info            vm_region_submap_info_data_t;
-
-#define VM_REGION_SUBMAP_INFO_COUNT            \
-       (sizeof(vm_region_submap_info_data_t)/sizeof(int))
-
+typedef struct vm_region_submap_info            *vm_region_submap_info_t;
+typedef struct vm_region_submap_info             vm_region_submap_info_data_t;

 
 

+#define VM_REGION_SUBMAP_INFO_COUNT                                     \
+       ((mach_msg_type_number_t)                                       \
+        (sizeof(vm_region_submap_info_data_t) / sizeof(natural_t)))

 
 struct vm_region_submap_info_64 {
 
 struct vm_region_submap_info_64 {

-       vm_prot_t               protection;     /* present access protection */
-       vm_prot_t               max_protection; /* max avail through vm_prot */
-       vm_inherit_t            inheritance;/* behavior of map/obj on fork */
-       vm_object_offset_t      offset;         /* offset into object/map */
-        unsigned int            user_tag;      /* user tag on map entry */
-        unsigned int            pages_resident;        /* only valid for objects */
-        unsigned int            pages_shared_now_private; /* only for objects */
-        unsigned int            pages_swapped_out; /* only for objects */
-        unsigned int            pages_dirtied;   /* only for objects */
-        unsigned int            ref_count;      /* obj/map mappers, etc */
-        unsigned short          shadow_depth;  /* only for obj */
-        unsigned char           external_pager;  /* only for obj */
-        unsigned char           share_mode;    /* see enumeration */
-       boolean_t               is_submap;      /* submap vs obj */
-       vm_behavior_t           behavior;       /* access behavior hint */
-       vm_offset_t             object_id;      /* obj/map name, not a handle */
-       unsigned short          user_wired_count; 
+       vm_prot_t               protection;     /* present access protection */
+       vm_prot_t               max_protection; /* max avail through vm_prot */
+       vm_inherit_t            inheritance;/* behavior of map/obj on fork */
+       memory_object_offset_t  offset;         /* offset into object/map */
+       unsigned int            user_tag;       /* user tag on map entry */
+       unsigned int            pages_resident; /* only valid for objects */
+       unsigned int            pages_shared_now_private; /* only for objects */
+       unsigned int            pages_swapped_out; /* only for objects */
+       unsigned int            pages_dirtied;   /* only for objects */
+       unsigned int            ref_count;       /* obj/map mappers, etc */
+       unsigned short          shadow_depth;   /* only for obj */
+       unsigned char           external_pager;  /* only for obj */
+       unsigned char           share_mode;     /* see enumeration */
+       boolean_t               is_submap;      /* submap vs obj */
+       vm_behavior_t           behavior;       /* access behavior hint */
+       vm32_object_id_t        object_id;      /* obj/map name, not a handle */
+       unsigned short          user_wired_count;
+       unsigned int            pages_reusable;
+       vm_object_id_t          object_id_full;

 };
 
 };
 

-typedef struct vm_region_submap_info_64                *vm_region_submap_info_64_t;
-typedef struct vm_region_submap_info_64                 vm_region_submap_info_data_64_t;
+typedef struct vm_region_submap_info_64         *vm_region_submap_info_64_t;
+typedef struct vm_region_submap_info_64          vm_region_submap_info_data_64_t;
+
+#define VM_REGION_SUBMAP_INFO_V2_SIZE   \
+       (sizeof (vm_region_submap_info_data_64_t))
+#define VM_REGION_SUBMAP_INFO_V1_SIZE   \
+       (VM_REGION_SUBMAP_INFO_V2_SIZE - \
+        sizeof (vm_object_id_t) /* object_id_full */ )
+#define VM_REGION_SUBMAP_INFO_V0_SIZE   \
+       (VM_REGION_SUBMAP_INFO_V1_SIZE - \
+        sizeof (unsigned int) /* pages_reusable */ )
+
+#define VM_REGION_SUBMAP_INFO_V2_COUNT_64 \
+       ((mach_msg_type_number_t) \
+        (VM_REGION_SUBMAP_INFO_V2_SIZE / sizeof (natural_t)))
+#define VM_REGION_SUBMAP_INFO_V1_COUNT_64 \
+       ((mach_msg_type_number_t) \
+        (VM_REGION_SUBMAP_INFO_V1_SIZE / sizeof (natural_t)))
+#define VM_REGION_SUBMAP_INFO_V0_COUNT_64 \
+       ((mach_msg_type_number_t) \
+        (VM_REGION_SUBMAP_INFO_V0_SIZE / sizeof (natural_t)))
+
+/* set this to the latest version */
+#define VM_REGION_SUBMAP_INFO_COUNT_64          VM_REGION_SUBMAP_INFO_V2_COUNT_64
+
+struct vm_region_submap_short_info_64 {
+       vm_prot_t               protection;     /* present access protection */
+       vm_prot_t               max_protection; /* max avail through vm_prot */
+       vm_inherit_t            inheritance;/* behavior of map/obj on fork */
+       memory_object_offset_t  offset;         /* offset into object/map */
+       unsigned int            user_tag;       /* user tag on map entry */
+       unsigned int            ref_count;       /* obj/map mappers, etc */
+       unsigned short          shadow_depth;   /* only for obj */
+       unsigned char           external_pager;  /* only for obj */
+       unsigned char           share_mode;     /* see enumeration */
+       boolean_t               is_submap;      /* submap vs obj */
+       vm_behavior_t           behavior;       /* access behavior hint */
+       vm32_object_id_t        object_id;      /* obj/map name, not a handle */
+       unsigned short          user_wired_count;
+};
+
+typedef struct vm_region_submap_short_info_64   *vm_region_submap_short_info_64_t;
+typedef struct vm_region_submap_short_info_64    vm_region_submap_short_info_data_64_t;

 
 

-#define VM_REGION_SUBMAP_INFO_COUNT_64         \
-       (sizeof(vm_region_submap_info_data_64_t)/sizeof(int))
+#define VM_REGION_SUBMAP_SHORT_INFO_COUNT_64                            \
+       ((mach_msg_type_number_t)                                       \
+        (sizeof (vm_region_submap_short_info_data_64_t) / sizeof (natural_t)))

 
 

+struct mach_vm_read_entry {
+       mach_vm_address_t address;
+       mach_vm_size_t size;
+};

 
 struct vm_read_entry {
 
 struct vm_read_entry {

-       vm_address_t    address;
-       vm_size_t       size;
+       vm_address_t    address;
+       vm_size_t       size;

 };
 
 };
 

+#ifdef VM32_SUPPORT
+struct vm32_read_entry {
+       vm32_address_t  address;
+       vm32_size_t     size;
+};
+#endif
+
+

 #define VM_MAP_ENTRY_MAX  (256)
 
 #define VM_MAP_ENTRY_MAX  (256)
 

-typedef struct vm_read_entry   vm_read_entry_t[VM_MAP_ENTRY_MAX];
+typedef struct mach_vm_read_entry       mach_vm_read_entry_t[VM_MAP_ENTRY_MAX];
+typedef struct vm_read_entry            vm_read_entry_t[VM_MAP_ENTRY_MAX];
+#ifdef VM32_SUPPORT
+typedef struct vm32_read_entry          vm32_read_entry_t[VM_MAP_ENTRY_MAX];
+#endif
+
+#pragma pack(pop)
+
+
+#define VM_PAGE_INFO_MAX
+typedef int *vm_page_info_t;
+typedef int vm_page_info_data_t[VM_PAGE_INFO_MAX];
+typedef int vm_page_info_flavor_t;
+
+#define VM_PAGE_INFO_BASIC              1
+struct vm_page_info_basic {
+       int                     disposition;
+       int                     ref_count;
+       vm_object_id_t          object_id;
+       memory_object_offset_t  offset;
+       int                     depth;
+       int                     __pad; /* pad to 64-bit boundary */
+};
+typedef struct vm_page_info_basic               *vm_page_info_basic_t;
+typedef struct vm_page_info_basic               vm_page_info_basic_data_t;
+
+#define VM_PAGE_INFO_BASIC_COUNT        ((mach_msg_type_number_t) \
+       (sizeof(vm_page_info_basic_data_t)/sizeof(int)))
+

 
 

-#endif /*_MACH_VM_REGION_H_*/
+#endif  /*_MACH_VM_REGION_H_*/