/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * 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 Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * 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. 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,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * 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@
+ * 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_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
* All Rights Reserved.
- *
+ *
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
- *
+ *
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ *
* Carnegie Mellon requests users of this software to return to
- *
+ *
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
- *
+ *
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: vm/vm_user.c
* Author: Avadis Tevanian, Jr., Michael Wayne Young
- *
+ *
* User-exported virtual memory functions.
*/
+/*
+ * There are three implementations of the "XXX_allocate" functionality in
+ * the kernel: mach_vm_allocate (for any task on the platform), vm_allocate
+ * (for a task with the same address space size, especially the current task),
+ * and vm32_vm_allocate (for the specific case of a 32-bit task). vm_allocate
+ * in the kernel should only be used on the kernel_task. vm32_vm_allocate only
+ * makes sense on platforms where a user task can either be 32 or 64, or the kernel
+ * task can be 32 or 64. mach_vm_allocate makes sense everywhere, and is preferred
+ * for new code.
+ *
+ * The entrypoints into the kernel are more complex. All platforms support a
+ * mach_vm_allocate-style API (subsystem 4800) which operates with the largest
+ * size types for the platform. On platforms that only support U32/K32,
+ * subsystem 4800 is all you need. On platforms that support both U32 and U64,
+ * subsystem 3800 is used disambiguate the size of parameters, and they will
+ * always be 32-bit and call into the vm32_vm_allocate APIs. On non-U32/K32 platforms,
+ * the MIG glue should never call into vm_allocate directly, because the calling
+ * task and kernel_task are unlikely to use the same size parameters
+ *
+ * New VM call implementations should be added here and to mach_vm.defs
+ * (subsystem 4800), and use mach_vm_* "wide" types.
+ */
+
#include <debug.h>
#include <vm_cpm.h>
#include <mach/boolean.h>
#include <mach/kern_return.h>
-#include <mach/mach_types.h> /* to get vm_address_t */
+#include <mach/mach_types.h> /* to get vm_address_t */
#include <mach/memory_object.h>
-#include <mach/std_types.h> /* to get pointer_t */
+#include <mach/std_types.h> /* to get pointer_t */
#include <mach/upl.h>
#include <mach/vm_attributes.h>
#include <mach/vm_param.h>
#include <mach/vm_statistics.h>
#include <mach/mach_syscalls.h>
+#include <mach/sdt.h>
#include <mach/host_priv_server.h>
#include <mach/mach_vm_server.h>
-#include <mach/shared_memory_server.h>
+#include <mach/memory_entry_server.h>
#include <mach/vm_map_server.h>
-#include <vm/vm_shared_memory_server.h>
#include <kern/host.h>
#include <kern/kalloc.h>
#include <vm/memory_object.h>
#include <vm/vm_pageout.h>
#include <vm/vm_protos.h>
+#include <vm/vm_purgeable_internal.h>
+#include <vm/vm_init.h>
+
+#include <san/kasan.h>
+
+#include <libkern/OSDebug.h>
+#include <IOKit/IOBSD.h>
vm_size_t upl_offset_to_pagelist = 0;
-#if VM_CPM
+#if VM_CPM
#include <vm/cpm.h>
-#endif /* VM_CPM */
-
-ipc_port_t dynamic_pager_control_port=NULL;
+#endif /* VM_CPM */
/*
* mach_vm_allocate allocates "zero fill" memory in the specfied
* map.
*/
kern_return_t
-mach_vm_allocate(
- vm_map_t map,
- mach_vm_offset_t *addr,
- mach_vm_size_t size,
- int flags)
+mach_vm_allocate_external(
+ vm_map_t map,
+ mach_vm_offset_t *addr,
+ mach_vm_size_t size,
+ int flags)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return mach_vm_allocate_kernel(map, addr, size, flags, tag);
+}
+
+kern_return_t
+mach_vm_allocate_kernel(
+ vm_map_t map,
+ mach_vm_offset_t *addr,
+ mach_vm_size_t size,
+ int flags,
+ vm_tag_t tag)
{
vm_map_offset_t map_addr;
- vm_map_size_t map_size;
- kern_return_t result;
- boolean_t anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
+ vm_map_size_t map_size;
+ kern_return_t result;
+ boolean_t anywhere;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_ALLOCATE) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
if (size == 0) {
*addr = 0;
- return(KERN_SUCCESS);
+ return KERN_SUCCESS;
}
+ anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
if (anywhere) {
/*
* No specific address requested, so start candidate address
* memory would tend to confuse those applications.
*/
map_addr = vm_map_min(map);
- if (map_addr == 0)
- map_addr += PAGE_SIZE;
- } else
- map_addr = vm_map_trunc_page(*addr);
- map_size = vm_map_round_page(size);
+ if (map_addr == 0) {
+ map_addr += VM_MAP_PAGE_SIZE(map);
+ }
+ } else {
+ map_addr = vm_map_trunc_page(*addr,
+ VM_MAP_PAGE_MASK(map));
+ }
+ map_size = vm_map_round_page(size,
+ VM_MAP_PAGE_MASK(map));
if (map_size == 0) {
- return(KERN_INVALID_ARGUMENT);
+ return KERN_INVALID_ARGUMENT;
}
result = vm_map_enter(
- map,
- &map_addr,
- map_size,
- (vm_map_offset_t)0,
- flags,
- VM_OBJECT_NULL,
- (vm_object_offset_t)0,
- FALSE,
- VM_PROT_DEFAULT,
- VM_PROT_ALL,
- VM_INHERIT_DEFAULT);
+ map,
+ &map_addr,
+ map_size,
+ (vm_map_offset_t)0,
+ flags,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
+ VM_OBJECT_NULL,
+ (vm_object_offset_t)0,
+ FALSE,
+ VM_PROT_DEFAULT,
+ VM_PROT_ALL,
+ VM_INHERIT_DEFAULT);
*addr = map_addr;
- return(result);
+ return result;
}
/*
- * vm_allocate
+ * vm_allocate
* Legacy routine that allocates "zero fill" memory in the specfied
* map (which is limited to the same size as the kernel).
*/
kern_return_t
-vm_allocate(
- vm_map_t map,
- vm_offset_t *addr,
- vm_size_t size,
- int flags)
+vm_allocate_external(
+ vm_map_t map,
+ vm_offset_t *addr,
+ vm_size_t size,
+ int flags)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return vm_allocate_kernel(map, addr, size, flags, tag);
+}
+
+kern_return_t
+vm_allocate_kernel(
+ vm_map_t map,
+ vm_offset_t *addr,
+ vm_size_t size,
+ int flags,
+ vm_tag_t tag)
{
vm_map_offset_t map_addr;
- vm_map_size_t map_size;
- kern_return_t result;
- boolean_t anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
+ vm_map_size_t map_size;
+ kern_return_t result;
+ boolean_t anywhere;
+
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_ALLOCATE) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
if (size == 0) {
*addr = 0;
- return(KERN_SUCCESS);
+ return KERN_SUCCESS;
}
+ anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
if (anywhere) {
/*
* No specific address requested, so start candidate address
* memory would tend to confuse those applications.
*/
map_addr = vm_map_min(map);
- if (map_addr == 0)
- map_addr += PAGE_SIZE;
- } else
- map_addr = vm_map_trunc_page(*addr);
- map_size = vm_map_round_page(size);
+ if (map_addr == 0) {
+ map_addr += VM_MAP_PAGE_SIZE(map);
+ }
+ } else {
+ map_addr = vm_map_trunc_page(*addr,
+ VM_MAP_PAGE_MASK(map));
+ }
+ map_size = vm_map_round_page(size,
+ VM_MAP_PAGE_MASK(map));
if (map_size == 0) {
- return(KERN_INVALID_ARGUMENT);
+ return KERN_INVALID_ARGUMENT;
}
result = vm_map_enter(
- map,
- &map_addr,
- map_size,
- (vm_map_offset_t)0,
- flags,
- VM_OBJECT_NULL,
- (vm_object_offset_t)0,
- FALSE,
- VM_PROT_DEFAULT,
- VM_PROT_ALL,
- VM_INHERIT_DEFAULT);
+ map,
+ &map_addr,
+ map_size,
+ (vm_map_offset_t)0,
+ flags,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
+ VM_OBJECT_NULL,
+ (vm_object_offset_t)0,
+ FALSE,
+ VM_PROT_DEFAULT,
+ VM_PROT_ALL,
+ VM_INHERIT_DEFAULT);
+
+#if KASAN
+ if (result == KERN_SUCCESS && map->pmap == kernel_pmap) {
+ kasan_notify_address(map_addr, map_size);
+ }
+#endif
*addr = CAST_DOWN(vm_offset_t, map_addr);
- return(result);
+ return result;
}
/*
*/
kern_return_t
mach_vm_deallocate(
- vm_map_t map,
- mach_vm_offset_t start,
- mach_vm_size_t size)
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size)
{
- if ((map == VM_MAP_NULL) || (start + size < start))
- return(KERN_INVALID_ARGUMENT);
+ if ((map == VM_MAP_NULL) || (start + size < start)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == (mach_vm_offset_t) 0)
- return(KERN_SUCCESS);
+ if (size == (mach_vm_offset_t) 0) {
+ return KERN_SUCCESS;
+ }
- return(vm_map_remove(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), VM_MAP_NO_FLAGS));
+ return vm_map_remove(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ VM_MAP_REMOVE_NO_FLAGS);
}
/*
*/
kern_return_t
vm_deallocate(
- register vm_map_t map,
- vm_offset_t start,
- vm_size_t size)
+ vm_map_t map,
+ vm_offset_t start,
+ vm_size_t size)
{
- if ((map == VM_MAP_NULL) || (start + size < start))
- return(KERN_INVALID_ARGUMENT);
+ if ((map == VM_MAP_NULL) || (start + size < start)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == (vm_offset_t) 0)
- return(KERN_SUCCESS);
+ if (size == (vm_offset_t) 0) {
+ return KERN_SUCCESS;
+ }
- return(vm_map_remove(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), VM_MAP_NO_FLAGS));
+ return vm_map_remove(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ VM_MAP_REMOVE_NO_FLAGS);
}
/*
*/
kern_return_t
mach_vm_inherit(
- vm_map_t map,
- mach_vm_offset_t start,
- mach_vm_size_t size,
- vm_inherit_t new_inheritance)
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size,
+ vm_inherit_t new_inheritance)
{
if ((map == VM_MAP_NULL) || (start + size < start) ||
- (new_inheritance > VM_INHERIT_LAST_VALID))
- return(KERN_INVALID_ARGUMENT);
+ (new_inheritance > VM_INHERIT_LAST_VALID)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return(vm_map_inherit(map,
- vm_map_trunc_page(start),
- vm_map_round_page(start+size),
- new_inheritance));
+ return vm_map_inherit(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ new_inheritance);
}
/*
*/
kern_return_t
vm_inherit(
- register vm_map_t map,
- vm_offset_t start,
- vm_size_t size,
- vm_inherit_t new_inheritance)
+ vm_map_t map,
+ vm_offset_t start,
+ vm_size_t size,
+ vm_inherit_t new_inheritance)
{
if ((map == VM_MAP_NULL) || (start + size < start) ||
- (new_inheritance > VM_INHERIT_LAST_VALID))
- return(KERN_INVALID_ARGUMENT);
+ (new_inheritance > VM_INHERIT_LAST_VALID)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return(vm_map_inherit(map,
- vm_map_trunc_page(start),
- vm_map_round_page(start+size),
- new_inheritance));
+ return vm_map_inherit(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ new_inheritance);
}
/*
kern_return_t
mach_vm_protect(
- vm_map_t map,
- mach_vm_offset_t start,
- mach_vm_size_t size,
- boolean_t set_maximum,
- vm_prot_t new_protection)
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size,
+ boolean_t set_maximum,
+ vm_prot_t new_protection)
{
if ((map == VM_MAP_NULL) || (start + size < start) ||
- (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY)))
- return(KERN_INVALID_ARGUMENT);
+ (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY))) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return(vm_map_protect(map,
- vm_map_trunc_page(start),
- vm_map_round_page(start+size),
- new_protection,
- set_maximum));
+ return vm_map_protect(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ new_protection,
+ set_maximum);
}
/*
kern_return_t
vm_protect(
- vm_map_t map,
- vm_offset_t start,
- vm_size_t size,
- boolean_t set_maximum,
- vm_prot_t new_protection)
+ vm_map_t map,
+ vm_offset_t start,
+ vm_size_t size,
+ boolean_t set_maximum,
+ vm_prot_t new_protection)
{
if ((map == VM_MAP_NULL) || (start + size < start) ||
- (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY)))
- return(KERN_INVALID_ARGUMENT);
+ (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY))) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return(vm_map_protect(map,
- vm_map_trunc_page(start),
- vm_map_round_page(start+size),
- new_protection,
- set_maximum));
+ return vm_map_protect(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ new_protection,
+ set_maximum);
}
/*
*/
kern_return_t
mach_vm_machine_attribute(
- vm_map_t map,
- mach_vm_address_t addr,
- mach_vm_size_t size,
- vm_machine_attribute_t attribute,
- vm_machine_attribute_val_t* value) /* IN/OUT */
+ vm_map_t map,
+ mach_vm_address_t addr,
+ mach_vm_size_t size,
+ vm_machine_attribute_t attribute,
+ vm_machine_attribute_val_t* value) /* IN/OUT */
{
- if ((map == VM_MAP_NULL) || (addr + size < addr))
- return(KERN_INVALID_ARGUMENT);
+ if ((map == VM_MAP_NULL) || (addr + size < addr)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return vm_map_machine_attribute(map,
- vm_map_trunc_page(addr),
- vm_map_round_page(addr+size),
- attribute,
- value);
+ return vm_map_machine_attribute(
+ map,
+ vm_map_trunc_page(addr,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(addr + size,
+ VM_MAP_PAGE_MASK(map)),
+ attribute,
+ value);
}
/*
*/
kern_return_t
vm_machine_attribute(
- vm_map_t map,
- vm_address_t addr,
- vm_size_t size,
- vm_machine_attribute_t attribute,
- vm_machine_attribute_val_t* value) /* IN/OUT */
+ vm_map_t map,
+ vm_address_t addr,
+ vm_size_t size,
+ vm_machine_attribute_t attribute,
+ vm_machine_attribute_val_t* value) /* IN/OUT */
{
- if ((map == VM_MAP_NULL) || (addr + size < addr))
- return(KERN_INVALID_ARGUMENT);
+ if ((map == VM_MAP_NULL) || (addr + size < addr)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return vm_map_machine_attribute(map,
- vm_map_trunc_page(addr),
- vm_map_round_page(addr+size),
- attribute,
- value);
+ return vm_map_machine_attribute(
+ map,
+ vm_map_trunc_page(addr,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(addr + size,
+ VM_MAP_PAGE_MASK(map)),
+ attribute,
+ value);
}
/*
* the IPC implementation as part of receiving the reply to this call.
* If IPC isn't used, the caller must deal with the vm_map_copy_t object
* that gets returned.
- *
+ *
* JMM - because of mach_msg_type_number_t, this call is limited to a
* single 4GB region at this time.
*
*/
kern_return_t
mach_vm_read(
- vm_map_t map,
- mach_vm_address_t addr,
- mach_vm_size_t size,
- pointer_t *data,
- mach_msg_type_number_t *data_size)
+ vm_map_t map,
+ mach_vm_address_t addr,
+ mach_vm_size_t size,
+ pointer_t *data,
+ mach_msg_type_number_t *data_size)
{
- kern_return_t error;
- vm_map_copy_t ipc_address;
+ kern_return_t error;
+ vm_map_copy_t ipc_address;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if ((mach_msg_type_number_t) size != size) {
+ return KERN_INVALID_ARGUMENT;
+ }
-
error = vm_map_copyin(map,
- (vm_map_address_t)addr,
- (vm_map_size_t)size,
- FALSE, /* src_destroy */
- &ipc_address);
+ (vm_map_address_t)addr,
+ (vm_map_size_t)size,
+ FALSE, /* src_destroy */
+ &ipc_address);
if (KERN_SUCCESS == error) {
*data = (pointer_t) ipc_address;
- *data_size = size;
+ *data_size = (mach_msg_type_number_t) size;
+ assert(*data_size == size);
}
- return(error);
+ return error;
}
/*
* vm_read -
* Read/copy a range from one address space and return it to the caller.
* Limited addressability (same range limits as for the native kernel map).
- *
+ *
* It is assumed that the address for the returned memory is selected by
* the IPC implementation as part of receiving the reply to this call.
* If IPC isn't used, the caller must deal with the vm_map_copy_t object
*/
kern_return_t
vm_read(
- vm_map_t map,
- vm_address_t addr,
- vm_size_t size,
- pointer_t *data,
- mach_msg_type_number_t *data_size)
+ vm_map_t map,
+ vm_address_t addr,
+ vm_size_t size,
+ pointer_t *data,
+ mach_msg_type_number_t *data_size)
{
- kern_return_t error;
- vm_map_copy_t ipc_address;
+ kern_return_t error;
+ vm_map_copy_t ipc_address;
+
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ mach_msg_type_number_t dsize;
+ if (os_convert_overflow(size, &dsize)) {
+ /*
+ * The kernel could handle a 64-bit "size" value, but
+ * it could not return the size of the data in "*data_size"
+ * without overflowing.
+ * Let's reject this "size" as invalid.
+ */
+ return KERN_INVALID_ARGUMENT;
+ }
error = vm_map_copyin(map,
- (vm_map_address_t)addr,
- (vm_map_size_t)size,
- FALSE, /* src_destroy */
- &ipc_address);
+ (vm_map_address_t)addr,
+ (vm_map_size_t)size,
+ FALSE, /* src_destroy */
+ &ipc_address);
if (KERN_SUCCESS == error) {
*data = (pointer_t) ipc_address;
- *data_size = size;
+ *data_size = dsize;
+ assert(*data_size == size);
}
- return(error);
+ return error;
}
-/*
+/*
* mach_vm_read_list -
* Read/copy a list of address ranges from specified map.
*
*/
kern_return_t
mach_vm_read_list(
- vm_map_t map,
- mach_vm_read_entry_t data_list,
- natural_t count)
+ vm_map_t map,
+ mach_vm_read_entry_t data_list,
+ natural_t count)
{
- mach_msg_type_number_t i;
- kern_return_t error;
- vm_map_copy_t copy;
+ mach_msg_type_number_t i;
+ kern_return_t error;
+ vm_map_copy_t copy;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL ||
+ count > VM_MAP_ENTRY_MAX) {
+ return KERN_INVALID_ARGUMENT;
+ }
error = KERN_SUCCESS;
- for(i=0; i<count; i++) {
+ for (i = 0; i < count; i++) {
vm_map_address_t map_addr;
vm_map_size_t map_size;
map_addr = (vm_map_address_t)(data_list[i].address);
map_size = (vm_map_size_t)(data_list[i].size);
- if(map_size != 0) {
+ if (map_size != 0) {
error = vm_map_copyin(map,
- map_addr,
- map_size,
- FALSE, /* src_destroy */
- ©);
+ map_addr,
+ map_size,
+ FALSE, /* src_destroy */
+ ©);
if (KERN_SUCCESS == error) {
error = vm_map_copyout(
- current_task()->map,
- &map_addr,
- copy);
+ current_task()->map,
+ &map_addr,
+ copy);
if (KERN_SUCCESS == error) {
data_list[i].address = map_addr;
continue;
data_list[i].address = (mach_vm_address_t)0;
data_list[i].size = (mach_vm_size_t)0;
}
- return(error);
+ return error;
}
-/*
+/*
* vm_read_list -
* Read/copy a list of address ranges from specified map.
*
kern_return_t
vm_read_list(
- vm_map_t map,
- vm_read_entry_t data_list,
- natural_t count)
+ vm_map_t map,
+ vm_read_entry_t data_list,
+ natural_t count)
{
- mach_msg_type_number_t i;
- kern_return_t error;
- vm_map_copy_t copy;
+ mach_msg_type_number_t i;
+ kern_return_t error;
+ vm_map_copy_t copy;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL ||
+ count > VM_MAP_ENTRY_MAX) {
+ return KERN_INVALID_ARGUMENT;
+ }
error = KERN_SUCCESS;
- for(i=0; i<count; i++) {
+ for (i = 0; i < count; i++) {
vm_map_address_t map_addr;
vm_map_size_t map_size;
map_addr = (vm_map_address_t)(data_list[i].address);
map_size = (vm_map_size_t)(data_list[i].size);
- if(map_size != 0) {
+ if (map_size != 0) {
error = vm_map_copyin(map,
- map_addr,
- map_size,
- FALSE, /* src_destroy */
- ©);
+ map_addr,
+ map_size,
+ FALSE, /* src_destroy */
+ ©);
if (KERN_SUCCESS == error) {
- error = vm_map_copyout(current_task()->map,
- &map_addr,
- copy);
+ error = vm_map_copyout(current_task()->map,
+ &map_addr,
+ copy);
if (KERN_SUCCESS == error) {
data_list[i].address =
- CAST_DOWN(vm_offset_t, map_addr);
+ CAST_DOWN(vm_offset_t, map_addr);
continue;
}
vm_map_copy_discard(copy);
data_list[i].address = (mach_vm_address_t)0;
data_list[i].size = (mach_vm_size_t)0;
}
- return(error);
+ return error;
}
/*
* mach_vm_read_overwrite -
* Overwrite a range of the current map with data from the specified
* map/address range.
- *
+ *
* In making an assumption that the current thread is local, it is
* no longer cluster-safe without a fully supportive local proxy
* thread/task (but we don't support cluster's anymore so this is moot).
kern_return_t
mach_vm_read_overwrite(
- vm_map_t map,
- mach_vm_address_t address,
- mach_vm_size_t size,
- mach_vm_address_t data,
- mach_vm_size_t *data_size)
+ vm_map_t map,
+ mach_vm_address_t address,
+ mach_vm_size_t size,
+ mach_vm_address_t data,
+ mach_vm_size_t *data_size)
{
- kern_return_t error;
- vm_map_copy_t copy;
+ kern_return_t error;
+ vm_map_copy_t copy;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
error = vm_map_copyin(map, (vm_map_address_t)address,
- (vm_map_size_t)size, FALSE, ©);
+ (vm_map_size_t)size, FALSE, ©);
if (KERN_SUCCESS == error) {
error = vm_map_copy_overwrite(current_thread()->map,
- (vm_map_address_t)data,
- copy, FALSE);
+ (vm_map_address_t)data,
+ copy, FALSE);
if (KERN_SUCCESS == error) {
*data_size = size;
return error;
}
vm_map_copy_discard(copy);
}
- return(error);
+ return error;
}
/*
* vm_read_overwrite -
* Overwrite a range of the current map with data from the specified
* map/address range.
- *
+ *
* This routine adds the additional limitation that the source and
* destination ranges must be describable with vm_address_t values
* (i.e. the same size address spaces as the kernel, or at least the
kern_return_t
vm_read_overwrite(
- vm_map_t map,
- vm_address_t address,
- vm_size_t size,
- vm_address_t data,
- vm_size_t *data_size)
+ vm_map_t map,
+ vm_address_t address,
+ vm_size_t size,
+ vm_address_t data,
+ vm_size_t *data_size)
{
- kern_return_t error;
- vm_map_copy_t copy;
+ kern_return_t error;
+ vm_map_copy_t copy;
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
error = vm_map_copyin(map, (vm_map_address_t)address,
- (vm_map_size_t)size, FALSE, ©);
+ (vm_map_size_t)size, FALSE, ©);
if (KERN_SUCCESS == error) {
error = vm_map_copy_overwrite(current_thread()->map,
- (vm_map_address_t)data,
- copy, FALSE);
+ (vm_map_address_t)data,
+ copy, FALSE);
if (KERN_SUCCESS == error) {
*data_size = size;
return error;
}
vm_map_copy_discard(copy);
}
- return(error);
+ return error;
}
*/
kern_return_t
mach_vm_write(
- vm_map_t map,
- mach_vm_address_t address,
- pointer_t data,
- __unused mach_msg_type_number_t size)
+ vm_map_t map,
+ mach_vm_address_t address,
+ pointer_t data,
+ __unused mach_msg_type_number_t size)
{
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
return vm_map_copy_overwrite(map, (vm_map_address_t)address,
- (vm_map_copy_t) data, FALSE /* interruptible XXX */);
+ (vm_map_copy_t) data, FALSE /* interruptible XXX */);
}
/*
*/
kern_return_t
vm_write(
- vm_map_t map,
- vm_address_t address,
- pointer_t data,
- __unused mach_msg_type_number_t size)
+ vm_map_t map,
+ vm_address_t address,
+ pointer_t data,
+ __unused mach_msg_type_number_t size)
{
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
return vm_map_copy_overwrite(map, (vm_map_address_t)address,
- (vm_map_copy_t) data, FALSE /* interruptible XXX */);
+ (vm_map_copy_t) data, FALSE /* interruptible XXX */);
}
/*
*/
kern_return_t
mach_vm_copy(
- vm_map_t map,
- mach_vm_address_t source_address,
- mach_vm_size_t size,
- mach_vm_address_t dest_address)
+ vm_map_t map,
+ mach_vm_address_t source_address,
+ mach_vm_size_t size,
+ mach_vm_address_t dest_address)
{
vm_map_copy_t copy;
kern_return_t kr;
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
kr = vm_map_copyin(map, (vm_map_address_t)source_address,
- (vm_map_size_t)size, FALSE, ©);
+ (vm_map_size_t)size, FALSE, ©);
if (KERN_SUCCESS == kr) {
kr = vm_map_copy_overwrite(map,
- (vm_map_address_t)dest_address,
- copy, FALSE /* interruptible XXX */);
+ (vm_map_address_t)dest_address,
+ copy, FALSE /* interruptible XXX */);
- if (KERN_SUCCESS != kr)
+ if (KERN_SUCCESS != kr) {
vm_map_copy_discard(copy);
+ }
}
return kr;
}
kern_return_t
vm_copy(
- vm_map_t map,
- vm_address_t source_address,
- vm_size_t size,
- vm_address_t dest_address)
+ vm_map_t map,
+ vm_address_t source_address,
+ vm_size_t size,
+ vm_address_t dest_address)
{
vm_map_copy_t copy;
kern_return_t kr;
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
kr = vm_map_copyin(map, (vm_map_address_t)source_address,
- (vm_map_size_t)size, FALSE, ©);
+ (vm_map_size_t)size, FALSE, ©);
if (KERN_SUCCESS == kr) {
kr = vm_map_copy_overwrite(map,
- (vm_map_address_t)dest_address,
- copy, FALSE /* interruptible XXX */);
+ (vm_map_address_t)dest_address,
+ copy, FALSE /* interruptible XXX */);
- if (KERN_SUCCESS != kr)
+ if (KERN_SUCCESS != kr) {
vm_map_copy_discard(copy);
+ }
}
return kr;
}
*
*/
kern_return_t
-mach_vm_map(
- vm_map_t target_map,
- mach_vm_offset_t *address,
- mach_vm_size_t initial_size,
- mach_vm_offset_t mask,
- int flags,
- ipc_port_t port,
- vm_object_offset_t offset,
- boolean_t copy,
- vm_prot_t cur_protection,
- vm_prot_t max_protection,
- vm_inherit_t inheritance)
-{
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- vm_object_t object;
- vm_object_size_t size;
- kern_return_t result;
-
- /*
- * Check arguments for validity
- */
- if ((target_map == VM_MAP_NULL) ||
- (cur_protection & ~VM_PROT_ALL) ||
- (max_protection & ~VM_PROT_ALL) ||
- (inheritance > VM_INHERIT_LAST_VALID) ||
- initial_size == 0)
- return(KERN_INVALID_ARGUMENT);
-
- map_addr = vm_map_trunc_page(*address);
- map_size = vm_map_round_page(initial_size);
- size = vm_object_round_page(initial_size);
-
- /*
- * Find the vm object (if any) corresponding to this port.
- */
- if (!IP_VALID(port)) {
- object = VM_OBJECT_NULL;
- offset = 0;
- copy = FALSE;
- } else if (ip_kotype(port) == IKOT_NAMED_ENTRY) {
- vm_named_entry_t named_entry;
-
- named_entry = (vm_named_entry_t)port->ip_kobject;
- /* a few checks to make sure user is obeying rules */
- if(size == 0) {
- if(offset >= named_entry->size)
- return(KERN_INVALID_RIGHT);
- size = named_entry->size - offset;
- }
- if((named_entry->protection & max_protection) != max_protection)
- return(KERN_INVALID_RIGHT);
- if((named_entry->protection & cur_protection) != cur_protection)
- return(KERN_INVALID_RIGHT);
- if(named_entry->size < (offset + size))
- return(KERN_INVALID_ARGUMENT);
-
- /* the callers parameter offset is defined to be the */
- /* offset from beginning of named entry offset in object */
- offset = offset + named_entry->offset;
-
- named_entry_lock(named_entry);
- if(named_entry->is_sub_map) {
- vm_map_entry_t map_entry;
-
- named_entry_unlock(named_entry);
- vm_object_reference(vm_submap_object);
- if ((result = vm_map_enter(target_map,
- &map_addr, map_size,
- (vm_map_offset_t)mask, flags,
- vm_submap_object, 0,
- FALSE,
- cur_protection, max_protection, inheritance
- )) != KERN_SUCCESS) {
- vm_object_deallocate(vm_submap_object);
- } else {
- char alias;
-
- VM_GET_FLAGS_ALIAS(flags, alias);
- if ((alias == VM_MEMORY_SHARED_PMAP) &&
- !copy) {
- vm_map_submap(target_map, map_addr,
- map_addr + map_size,
- named_entry->backing.map,
- (vm_map_offset_t)offset, TRUE);
- } else {
- vm_map_submap(target_map, map_addr,
- map_addr + map_size,
- named_entry->backing.map,
- (vm_map_offset_t)offset, FALSE);
- }
- if(copy) {
- if(vm_map_lookup_entry(
- target_map, map_addr, &map_entry)) {
- map_entry->needs_copy = TRUE;
- }
- }
- *address = map_addr;
- }
- return(result);
-
- } else if (named_entry->is_pager) {
- unsigned int access;
- vm_prot_t protections;
- unsigned int wimg_mode;
- boolean_t cache_attr;
-
- protections = named_entry->protection
- & VM_PROT_ALL;
- access = GET_MAP_MEM(named_entry->protection);
-
- object = vm_object_enter(
- named_entry->backing.pager,
- named_entry->size,
- named_entry->internal,
- FALSE,
- FALSE);
- if (object == VM_OBJECT_NULL) {
- named_entry_unlock(named_entry);
- return(KERN_INVALID_OBJECT);
- }
-
- /* JMM - drop reference on pager here */
-
- /* create an extra ref for the named entry */
- vm_object_lock(object);
- vm_object_reference_locked(object);
- named_entry->backing.object = object;
- named_entry->is_pager = FALSE;
- named_entry_unlock(named_entry);
-
- wimg_mode = object->wimg_bits;
- if(access == MAP_MEM_IO) {
- wimg_mode = VM_WIMG_IO;
- } else if (access == MAP_MEM_COPYBACK) {
- wimg_mode = VM_WIMG_USE_DEFAULT;
- } else if (access == MAP_MEM_WTHRU) {
- wimg_mode = VM_WIMG_WTHRU;
- } else if (access == MAP_MEM_WCOMB) {
- wimg_mode = VM_WIMG_WCOMB;
- }
- if ((wimg_mode == VM_WIMG_IO)
- || (wimg_mode == VM_WIMG_WCOMB))
- cache_attr = TRUE;
- else
- cache_attr = FALSE;
-
- /* wait for object (if any) to be ready */
- if (!named_entry->internal) {
- while (!object->pager_ready) {
- vm_object_wait(object,
- VM_OBJECT_EVENT_PAGER_READY,
- THREAD_UNINT);
- vm_object_lock(object);
- }
- }
-
- if(object->wimg_bits != wimg_mode) {
- vm_page_t p;
+mach_vm_map_external(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t initial_size,
+ mach_vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return mach_vm_map_kernel(target_map, address, initial_size, mask,
+ flags, VM_MAP_KERNEL_FLAGS_NONE, tag,
+ port, offset, copy,
+ cur_protection, max_protection,
+ inheritance);
+}
- vm_object_paging_wait(object, THREAD_UNINT);
+kern_return_t
+mach_vm_map_kernel(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t initial_size,
+ mach_vm_offset_t mask,
+ int flags,
+ vm_map_kernel_flags_t vmk_flags,
+ vm_tag_t tag,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ kern_return_t kr;
+ vm_map_offset_t vmmaddr;
- object->wimg_bits = wimg_mode;
- queue_iterate(&object->memq, p, vm_page_t, listq) {
- if (!p->fictitious) {
- pmap_disconnect(p->phys_page);
- if (cache_attr)
- pmap_sync_page_attributes_phys(p->phys_page);
- }
- }
- }
- object->true_share = TRUE;
- if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC)
- object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
- vm_object_unlock(object);
- } else {
- /* This is the case where we are going to map */
- /* an already mapped object. If the object is */
- /* not ready it is internal. An external */
- /* object cannot be mapped until it is ready */
- /* we can therefore avoid the ready check */
- /* in this case. */
- object = named_entry->backing.object;
- assert(object != VM_OBJECT_NULL);
- named_entry_unlock(named_entry);
- vm_object_reference(object);
- }
- } else if (ip_kotype(port) == IKOT_MEMORY_OBJECT) {
- /*
- * JMM - This is temporary until we unify named entries
- * and raw memory objects.
- *
- * Detected fake ip_kotype for a memory object. In
- * this case, the port isn't really a port at all, but
- * instead is just a raw memory object.
- */
-
- if ((object = vm_object_enter((memory_object_t)port,
- size, FALSE, FALSE, FALSE))
- == VM_OBJECT_NULL)
- return(KERN_INVALID_OBJECT);
+ vmmaddr = (vm_map_offset_t) *address;
- /* wait for object (if any) to be ready */
- if (object != VM_OBJECT_NULL) {
- if(object == kernel_object) {
- printf("Warning: Attempt to map kernel object"
- " by a non-private kernel entity\n");
- return(KERN_INVALID_OBJECT);
- }
- vm_object_lock(object);
- while (!object->pager_ready) {
- vm_object_wait(object,
- VM_OBJECT_EVENT_PAGER_READY,
- THREAD_UNINT);
- vm_object_lock(object);
- }
- vm_object_unlock(object);
- }
- } else {
- return (KERN_INVALID_OBJECT);
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_MAP) {
+ return KERN_INVALID_ARGUMENT;
}
- /*
- * Perform the copy if requested
- */
-
- if (copy) {
- vm_object_t new_object;
- vm_object_offset_t new_offset;
-
- result = vm_object_copy_strategically(object, offset, size,
- &new_object, &new_offset,
- ©);
-
-
- if (result == KERN_MEMORY_RESTART_COPY) {
- boolean_t success;
- boolean_t src_needs_copy;
-
- /*
- * XXX
- * We currently ignore src_needs_copy.
- * This really is the issue of how to make
- * MEMORY_OBJECT_COPY_SYMMETRIC safe for
- * non-kernel users to use. Solution forthcoming.
- * In the meantime, since we don't allow non-kernel
- * memory managers to specify symmetric copy,
- * we won't run into problems here.
- */
- new_object = object;
- new_offset = offset;
- success = vm_object_copy_quickly(&new_object,
- new_offset, size,
- &src_needs_copy,
- ©);
- assert(success);
- result = KERN_SUCCESS;
- }
- /*
- * Throw away the reference to the
- * original object, as it won't be mapped.
- */
-
- vm_object_deallocate(object);
-
- if (result != KERN_SUCCESS)
- return (result);
-
- object = new_object;
- offset = new_offset;
+ kr = vm_map_enter_mem_object(target_map,
+ &vmmaddr,
+ initial_size,
+ mask,
+ flags,
+ vmk_flags,
+ tag,
+ port,
+ offset,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
+
+#if KASAN
+ if (kr == KERN_SUCCESS && target_map->pmap == kernel_pmap) {
+ kasan_notify_address(vmmaddr, initial_size);
}
+#endif
- if ((result = vm_map_enter(target_map,
- &map_addr, map_size,
- (vm_map_offset_t)mask,
- flags,
- object, offset,
- copy,
- cur_protection, max_protection, inheritance
- )) != KERN_SUCCESS)
- vm_object_deallocate(object);
- *address = map_addr;
- return(result);
+ *address = vmmaddr;
+ return kr;
}
/* legacy interface */
kern_return_t
-vm_map_64(
- vm_map_t target_map,
- vm_offset_t *address,
- vm_size_t size,
- vm_offset_t mask,
- int flags,
- ipc_port_t port,
- vm_object_offset_t offset,
- boolean_t copy,
- vm_prot_t cur_protection,
- vm_prot_t max_protection,
- vm_inherit_t inheritance)
+vm_map_64_external(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return vm_map_64_kernel(target_map, address, size, mask,
+ flags, VM_MAP_KERNEL_FLAGS_NONE,
+ tag, port, offset, copy,
+ cur_protection, max_protection,
+ inheritance);
+}
+
+kern_return_t
+vm_map_64_kernel(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ vm_map_kernel_flags_t vmk_flags,
+ vm_tag_t tag,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
{
mach_vm_address_t map_addr;
mach_vm_size_t map_size;
map_size = (mach_vm_size_t)size;
map_mask = (mach_vm_offset_t)mask;
- kr = mach_vm_map(target_map, &map_addr, map_size, map_mask, flags,
- port, offset, copy,
- cur_protection, max_protection, inheritance);
- *address = CAST_DOWN(vm_address_t, map_addr);
+ kr = mach_vm_map_kernel(target_map, &map_addr, map_size, map_mask,
+ flags, vmk_flags, tag,
+ port, offset, copy,
+ cur_protection, max_protection, inheritance);
+ *address = CAST_DOWN(vm_offset_t, map_addr);
return kr;
}
/* temporary, until world build */
kern_return_t
-vm_map(
- vm_map_t target_map,
- vm_offset_t *address,
- vm_size_t size,
- vm_offset_t mask,
- int flags,
- ipc_port_t port,
- vm_offset_t offset,
- boolean_t copy,
- vm_prot_t cur_protection,
- vm_prot_t max_protection,
- vm_inherit_t inheritance)
+vm_map_external(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return vm_map_kernel(target_map, address, size, mask,
+ flags, VM_MAP_KERNEL_FLAGS_NONE, tag,
+ port, offset, copy,
+ cur_protection, max_protection, inheritance);
+}
+
+kern_return_t
+vm_map_kernel(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ vm_map_kernel_flags_t vmk_flags,
+ vm_tag_t tag,
+ ipc_port_t port,
+ vm_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
{
mach_vm_address_t map_addr;
mach_vm_size_t map_size;
map_mask = (mach_vm_offset_t)mask;
obj_offset = (vm_object_offset_t)offset;
- kr = mach_vm_map(target_map, &map_addr, map_size, map_mask, flags,
- port, obj_offset, copy,
- cur_protection, max_protection, inheritance);
- *address = CAST_DOWN(vm_address_t, map_addr);
+ kr = mach_vm_map_kernel(target_map, &map_addr, map_size, map_mask,
+ flags, vmk_flags, tag,
+ port, obj_offset, copy,
+ cur_protection, max_protection, inheritance);
+ *address = CAST_DOWN(vm_offset_t, map_addr);
return kr;
}
* over top of itself (with altered permissions and/or
* as an in-place copy of itself).
*/
+kern_return_t
+mach_vm_remap_external(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t size,
+ mach_vm_offset_t mask,
+ int flags,
+ vm_map_t src_map,
+ mach_vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+ VM_GET_FLAGS_ALIAS(flags, tag);
+
+ return mach_vm_remap_kernel(target_map, address, size, mask, flags, tag, src_map, memory_address,
+ copy, cur_protection, max_protection, inheritance);
+}
kern_return_t
-mach_vm_remap(
- vm_map_t target_map,
- mach_vm_offset_t *address,
- mach_vm_size_t size,
- mach_vm_offset_t mask,
- boolean_t anywhere,
- vm_map_t src_map,
- mach_vm_offset_t memory_address,
- boolean_t copy,
- vm_prot_t *cur_protection,
- vm_prot_t *max_protection,
- vm_inherit_t inheritance)
+mach_vm_remap_kernel(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t size,
+ mach_vm_offset_t mask,
+ int flags,
+ vm_tag_t tag,
+ vm_map_t src_map,
+ mach_vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance)
{
- vm_map_offset_t map_addr;
- kern_return_t kr;
+ vm_map_offset_t map_addr;
+ kern_return_t kr;
- if (VM_MAP_NULL == target_map || VM_MAP_NULL == src_map)
+ if (VM_MAP_NULL == target_map || VM_MAP_NULL == src_map) {
return KERN_INVALID_ARGUMENT;
+ }
+
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_REMAP) {
+ return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_offset_t)*address;
kr = vm_map_remap(target_map,
- &map_addr,
- size,
- mask,
- anywhere,
- src_map,
- memory_address,
- copy,
- cur_protection,
- max_protection,
- inheritance);
+ &map_addr,
+ size,
+ mask,
+ flags,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
+ src_map,
+ memory_address,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
*address = map_addr;
return kr;
}
* kernel context).
*/
kern_return_t
-vm_remap(
- vm_map_t target_map,
- vm_offset_t *address,
- vm_size_t size,
- vm_offset_t mask,
- boolean_t anywhere,
- vm_map_t src_map,
- vm_offset_t memory_address,
- boolean_t copy,
- vm_prot_t *cur_protection,
- vm_prot_t *max_protection,
- vm_inherit_t inheritance)
+vm_remap_external(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ vm_map_t src_map,
+ vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+ VM_GET_FLAGS_ALIAS(flags, tag);
+
+ return vm_remap_kernel(target_map, address, size, mask, flags, tag, src_map,
+ memory_address, copy, cur_protection, max_protection, inheritance);
+}
+
+kern_return_t
+vm_remap_kernel(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ vm_tag_t tag,
+ vm_map_t src_map,
+ vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance)
{
- vm_map_offset_t map_addr;
- kern_return_t kr;
+ vm_map_offset_t map_addr;
+ kern_return_t kr;
+
+ if (VM_MAP_NULL == target_map || VM_MAP_NULL == src_map) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (VM_MAP_NULL == target_map || VM_MAP_NULL == src_map)
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_REMAP) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_offset_t)*address;
kr = vm_map_remap(target_map,
- &map_addr,
- size,
- mask,
- anywhere,
- src_map,
- memory_address,
- copy,
- cur_protection,
- max_protection,
- inheritance);
+ &map_addr,
+ size,
+ mask,
+ flags,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ tag,
+ src_map,
+ memory_address,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
*address = CAST_DOWN(vm_offset_t, map_addr);
return kr;
}
* [ To unwire the pages, specify VM_PROT_NONE. ]
*/
kern_return_t
-mach_vm_wire(
- host_priv_t host_priv,
- vm_map_t map,
- mach_vm_offset_t start,
- mach_vm_size_t size,
- vm_prot_t access)
+mach_vm_wire_external(
+ host_priv_t host_priv,
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size,
+ vm_prot_t access)
+{
+ return mach_vm_wire_kernel(host_priv, map, start, size, access, VM_KERN_MEMORY_MLOCK);
+}
+
+kern_return_t
+mach_vm_wire_kernel(
+ host_priv_t host_priv,
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size,
+ vm_prot_t access,
+ vm_tag_t tag)
{
- kern_return_t rc;
+ kern_return_t rc;
- if (host_priv == HOST_PRIV_NULL)
+ if (host_priv == HOST_PRIV_NULL) {
return KERN_INVALID_HOST;
+ }
assert(host_priv == &realhost);
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_TASK;
+ }
- if (access & ~VM_PROT_ALL)
+ if (access & ~VM_PROT_ALL || (start + size < start)) {
return KERN_INVALID_ARGUMENT;
+ }
if (access != VM_PROT_NONE) {
- rc = vm_map_wire(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), access, TRUE);
+ rc = vm_map_wire_kernel(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ access, tag,
+ TRUE);
} else {
- rc = vm_map_unwire(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), TRUE);
+ rc = vm_map_unwire(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ TRUE);
}
return rc;
}
*/
kern_return_t
vm_wire(
- host_priv_t host_priv,
- register vm_map_t map,
- vm_offset_t start,
- vm_size_t size,
- vm_prot_t access)
+ host_priv_t host_priv,
+ vm_map_t map,
+ vm_offset_t start,
+ vm_size_t size,
+ vm_prot_t access)
{
- kern_return_t rc;
+ kern_return_t rc;
- if (host_priv == HOST_PRIV_NULL)
+ if (host_priv == HOST_PRIV_NULL) {
return KERN_INVALID_HOST;
+ }
assert(host_priv == &realhost);
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_TASK;
+ }
- if ((access & ~VM_PROT_ALL) || (start + size < start))
+ if ((access & ~VM_PROT_ALL) || (start + size < start)) {
return KERN_INVALID_ARGUMENT;
+ }
if (size == 0) {
rc = KERN_SUCCESS;
} else if (access != VM_PROT_NONE) {
- rc = vm_map_wire(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), access, TRUE);
+ rc = vm_map_wire_kernel(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ access, VM_KERN_MEMORY_OSFMK,
+ TRUE);
} else {
- rc = vm_map_unwire(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), TRUE);
+ rc = vm_map_unwire(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start + size,
+ VM_MAP_PAGE_MASK(map)),
+ TRUE);
}
return rc;
}
kern_return_t
mach_vm_msync(
- vm_map_t map,
- mach_vm_address_t address,
- mach_vm_size_t size,
- vm_sync_t sync_flags)
+ vm_map_t map,
+ mach_vm_address_t address,
+ mach_vm_size_t size,
+ vm_sync_t sync_flags)
{
-
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_TASK);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
return vm_map_msync(map, (vm_map_address_t)address,
- (vm_map_size_t)size, sync_flags);
+ (vm_map_size_t)size, sync_flags);
}
-
+
/*
* vm_msync
*
kern_return_t
vm_msync(
- vm_map_t map,
- vm_address_t address,
- vm_size_t size,
- vm_sync_t sync_flags)
+ vm_map_t map,
+ vm_address_t address,
+ vm_size_t size,
+ vm_sync_t sync_flags)
{
-
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_TASK);
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
return vm_map_msync(map, (vm_map_address_t)address,
- (vm_map_size_t)size, sync_flags);
+ (vm_map_size_t)size, sync_flags);
}
+int
+vm_toggle_entry_reuse(int toggle, int *old_value)
+{
+ vm_map_t map = current_map();
+
+ assert(!map->is_nested_map);
+ if (toggle == VM_TOGGLE_GETVALUE && old_value != NULL) {
+ *old_value = map->disable_vmentry_reuse;
+ } else if (toggle == VM_TOGGLE_SET) {
+ vm_map_entry_t map_to_entry;
+
+ vm_map_lock(map);
+ vm_map_disable_hole_optimization(map);
+ map->disable_vmentry_reuse = TRUE;
+ __IGNORE_WCASTALIGN(map_to_entry = vm_map_to_entry(map));
+ if (map->first_free == map_to_entry) {
+ map->highest_entry_end = vm_map_min(map);
+ } else {
+ map->highest_entry_end = map->first_free->vme_end;
+ }
+ vm_map_unlock(map);
+ } else if (toggle == VM_TOGGLE_CLEAR) {
+ vm_map_lock(map);
+ map->disable_vmentry_reuse = FALSE;
+ vm_map_unlock(map);
+ } else {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ return KERN_SUCCESS;
+}
+
/*
- * mach_vm_behavior_set
+ * mach_vm_behavior_set
*
* Sets the paging behavior attribute for the specified range
* in the specified map.
* This routine will fail with KERN_INVALID_ADDRESS if any address
* in [start,start+size) is not a valid allocated memory region.
*/
-kern_return_t
+kern_return_t
mach_vm_behavior_set(
- vm_map_t map,
- mach_vm_offset_t start,
- mach_vm_size_t size,
- vm_behavior_t new_behavior)
+ vm_map_t map,
+ mach_vm_offset_t start,
+ mach_vm_size_t size,
+ vm_behavior_t new_behavior)
{
- if ((map == VM_MAP_NULL) || (start + size < start))
- return(KERN_INVALID_ARGUMENT);
+ vm_map_offset_t align_mask;
+
+ if ((map == VM_MAP_NULL) || (start + size < start)) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (size == 0)
+ if (size == 0) {
return KERN_SUCCESS;
+ }
- return(vm_map_behavior_set(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), new_behavior));
-}
+ switch (new_behavior) {
+ case VM_BEHAVIOR_REUSABLE:
+ case VM_BEHAVIOR_REUSE:
+ case VM_BEHAVIOR_CAN_REUSE:
+ /*
+ * Align to the hardware page size, to allow
+ * malloc() to maximize the amount of re-usability,
+ * even on systems with larger software page size.
+ */
+ align_mask = PAGE_MASK;
+ break;
+ default:
+ align_mask = VM_MAP_PAGE_MASK(map);
+ break;
+ }
+
+ return vm_map_behavior_set(map,
+ vm_map_trunc_page(start, align_mask),
+ vm_map_round_page(start + size, align_mask),
+ new_behavior);
+}
/*
- * vm_behavior_set
+ * vm_behavior_set
*
* Sets the paging behavior attribute for the specified range
* in the specified map.
* use of vm_offset_t (if the map provided is larger than the
* kernel's).
*/
-kern_return_t
+kern_return_t
vm_behavior_set(
- vm_map_t map,
- vm_offset_t start,
- vm_size_t size,
- vm_behavior_t new_behavior)
+ vm_map_t map,
+ vm_offset_t start,
+ vm_size_t size,
+ vm_behavior_t new_behavior)
{
- if ((map == VM_MAP_NULL) || (start + size < start))
- return(KERN_INVALID_ARGUMENT);
-
- if (size == 0)
- return KERN_SUCCESS;
+ if (start + size < start) {
+ return KERN_INVALID_ARGUMENT;
+ }
- return(vm_map_behavior_set(map, vm_map_trunc_page(start),
- vm_map_round_page(start+size), new_behavior));
+ return mach_vm_behavior_set(map,
+ (mach_vm_offset_t) start,
+ (mach_vm_size_t) size,
+ new_behavior);
}
/*
kern_return_t
mach_vm_region(
- vm_map_t map,
- mach_vm_offset_t *address, /* IN/OUT */
- mach_vm_size_t *size, /* OUT */
- vm_region_flavor_t flavor, /* IN */
- vm_region_info_t info, /* OUT */
- mach_msg_type_number_t *count, /* IN/OUT */
- mach_port_t *object_name) /* OUT */
+ vm_map_t map,
+ mach_vm_offset_t *address, /* IN/OUT */
+ mach_vm_size_t *size, /* OUT */
+ vm_region_flavor_t flavor, /* IN */
+ vm_region_info_t info, /* OUT */
+ mach_msg_type_number_t *count, /* IN/OUT */
+ mach_port_t *object_name) /* OUT */
{
- vm_map_offset_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_offset_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_offset_t)*address;
map_size = (vm_map_size_t)*size;
/* legacy conversion */
- if (VM_REGION_BASIC_INFO == flavor)
+ if (VM_REGION_BASIC_INFO == flavor) {
flavor = VM_REGION_BASIC_INFO_64;
+ }
kr = vm_map_region(map,
- &map_addr, &map_size,
- flavor, info, count,
- object_name);
+ &map_addr, &map_size,
+ flavor, info, count,
+ object_name);
*address = map_addr;
*size = map_size;
kern_return_t
vm_region_64(
- vm_map_t map,
- vm_offset_t *address, /* IN/OUT */
- vm_size_t *size, /* OUT */
- vm_region_flavor_t flavor, /* IN */
- vm_region_info_t info, /* OUT */
- mach_msg_type_number_t *count, /* IN/OUT */
- mach_port_t *object_name) /* OUT */
+ vm_map_t map,
+ vm_offset_t *address, /* IN/OUT */
+ vm_size_t *size, /* OUT */
+ vm_region_flavor_t flavor, /* IN */
+ vm_region_info_t info, /* OUT */
+ mach_msg_type_number_t *count, /* IN/OUT */
+ mach_port_t *object_name) /* OUT */
{
- vm_map_offset_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_offset_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_offset_t)*address;
map_size = (vm_map_size_t)*size;
/* legacy conversion */
- if (VM_REGION_BASIC_INFO == flavor)
+ if (VM_REGION_BASIC_INFO == flavor) {
flavor = VM_REGION_BASIC_INFO_64;
+ }
kr = vm_map_region(map,
- &map_addr, &map_size,
- flavor, info, count,
- object_name);
+ &map_addr, &map_size,
+ flavor, info, count,
+ object_name);
*address = CAST_DOWN(vm_offset_t, map_addr);
*size = CAST_DOWN(vm_size_t, map_size);
- if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS)
+ if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS) {
return KERN_INVALID_ADDRESS;
+ }
return kr;
}
kern_return_t
vm_region(
- vm_map_t map,
- vm_address_t *address, /* IN/OUT */
- vm_size_t *size, /* OUT */
- vm_region_flavor_t flavor, /* IN */
- vm_region_info_t info, /* OUT */
- mach_msg_type_number_t *count, /* IN/OUT */
- mach_port_t *object_name) /* OUT */
+ vm_map_t map,
+ vm_address_t *address, /* IN/OUT */
+ vm_size_t *size, /* OUT */
+ vm_region_flavor_t flavor, /* IN */
+ vm_region_info_t info, /* OUT */
+ mach_msg_type_number_t *count, /* IN/OUT */
+ mach_port_t *object_name) /* OUT */
{
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_address_t)*address;
map_size = (vm_map_size_t)*size;
kr = vm_map_region(map,
- &map_addr, &map_size,
- flavor, info, count,
- object_name);
+ &map_addr, &map_size,
+ flavor, info, count,
+ object_name);
*address = CAST_DOWN(vm_address_t, map_addr);
*size = CAST_DOWN(vm_size_t, map_size);
- if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS)
+ if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS) {
return KERN_INVALID_ADDRESS;
+ }
return kr;
}
*/
kern_return_t
mach_vm_region_recurse(
- vm_map_t map,
- mach_vm_address_t *address,
- mach_vm_size_t *size,
- uint32_t *depth,
- vm_region_recurse_info_t info,
- mach_msg_type_number_t *infoCnt)
+ vm_map_t map,
+ mach_vm_address_t *address,
+ mach_vm_size_t *size,
+ uint32_t *depth,
+ vm_region_recurse_info_t info,
+ mach_msg_type_number_t *infoCnt)
{
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_address_t)*address;
map_size = (vm_map_size_t)*size;
kr = vm_map_region_recurse_64(
- map,
- &map_addr,
- &map_size,
- depth,
- (vm_region_submap_info_64_t)info,
- infoCnt);
+ map,
+ &map_addr,
+ &map_size,
+ depth,
+ (vm_region_submap_info_64_t)info,
+ infoCnt);
*address = map_addr;
*size = map_size;
*/
kern_return_t
vm_region_recurse_64(
- vm_map_t map,
- vm_address_t *address,
- vm_size_t *size,
- uint32_t *depth,
- vm_region_recurse_info_64_t info,
- mach_msg_type_number_t *infoCnt)
+ vm_map_t map,
+ vm_address_t *address,
+ vm_size_t *size,
+ uint32_t *depth,
+ vm_region_recurse_info_64_t info,
+ mach_msg_type_number_t *infoCnt)
{
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_address_t)*address;
map_size = (vm_map_size_t)*size;
kr = vm_map_region_recurse_64(
- map,
- &map_addr,
- &map_size,
- depth,
- (vm_region_submap_info_64_t)info,
- infoCnt);
+ map,
+ &map_addr,
+ &map_size,
+ depth,
+ (vm_region_submap_info_64_t)info,
+ infoCnt);
*address = CAST_DOWN(vm_address_t, map_addr);
*size = CAST_DOWN(vm_size_t, map_size);
- if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS)
+ if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS) {
return KERN_INVALID_ADDRESS;
+ }
return kr;
}
kern_return_t
vm_region_recurse(
- vm_map_t map,
- vm_offset_t *address, /* IN/OUT */
- vm_size_t *size, /* OUT */
- natural_t *depth, /* IN/OUT */
- vm_region_recurse_info_t info32, /* IN/OUT */
- mach_msg_type_number_t *infoCnt) /* IN/OUT */
+ vm_map_t map,
+ vm_offset_t *address, /* IN/OUT */
+ vm_size_t *size, /* OUT */
+ natural_t *depth, /* IN/OUT */
+ vm_region_recurse_info_t info32, /* IN/OUT */
+ mach_msg_type_number_t *infoCnt) /* IN/OUT */
{
vm_region_submap_info_data_64_t info64;
vm_region_submap_info_t info;
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (VM_MAP_NULL == map || *infoCnt < VM_REGION_SUBMAP_INFO_COUNT)
+ if (VM_MAP_NULL == map || *infoCnt < VM_REGION_SUBMAP_INFO_COUNT) {
return KERN_INVALID_ARGUMENT;
+ }
+
-
map_addr = (vm_map_address_t)*address;
map_size = (vm_map_size_t)*size;
info = (vm_region_submap_info_t)info32;
*infoCnt = VM_REGION_SUBMAP_INFO_COUNT_64;
- kr = vm_map_region_recurse_64(map, &map_addr,&map_size,
- depth, &info64, infoCnt);
+ kr = vm_map_region_recurse_64(map, &map_addr, &map_size,
+ depth, &info64, infoCnt);
info->protection = info64.protection;
info->max_protection = info64.max_protection;
info->inheritance = info64.inheritance;
info->offset = (uint32_t)info64.offset; /* trouble-maker */
- info->user_tag = info64.user_tag;
- info->pages_resident = info64.pages_resident;
- info->pages_shared_now_private = info64.pages_shared_now_private;
- info->pages_swapped_out = info64.pages_swapped_out;
- info->pages_dirtied = info64.pages_dirtied;
- info->ref_count = info64.ref_count;
- info->shadow_depth = info64.shadow_depth;
- info->external_pager = info64.external_pager;
- info->share_mode = info64.share_mode;
+ info->user_tag = info64.user_tag;
+ info->pages_resident = info64.pages_resident;
+ info->pages_shared_now_private = info64.pages_shared_now_private;
+ info->pages_swapped_out = info64.pages_swapped_out;
+ info->pages_dirtied = info64.pages_dirtied;
+ info->ref_count = info64.ref_count;
+ info->shadow_depth = info64.shadow_depth;
+ info->external_pager = info64.external_pager;
+ info->share_mode = info64.share_mode;
info->is_submap = info64.is_submap;
info->behavior = info64.behavior;
info->object_id = info64.object_id;
- info->user_wired_count = info64.user_wired_count;
+ info->user_wired_count = info64.user_wired_count;
*address = CAST_DOWN(vm_address_t, map_addr);
*size = CAST_DOWN(vm_size_t, map_size);
*infoCnt = VM_REGION_SUBMAP_INFO_COUNT;
- if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS)
+ if (KERN_SUCCESS == kr && map_addr + map_size > VM_MAX_ADDRESS) {
return KERN_INVALID_ADDRESS;
+ }
return kr;
}
+kern_return_t
+mach_vm_purgable_control(
+ vm_map_t map,
+ mach_vm_offset_t address,
+ vm_purgable_t control,
+ int *state)
+{
+ if (VM_MAP_NULL == map) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (control == VM_PURGABLE_SET_STATE_FROM_KERNEL) {
+ /* not allowed from user-space */
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ return vm_map_purgable_control(map,
+ vm_map_trunc_page(address, PAGE_MASK),
+ control,
+ state);
+}
+
kern_return_t
vm_purgable_control(
- vm_map_t map,
- vm_offset_t address,
- vm_purgable_t control,
- int *state)
+ vm_map_t map,
+ vm_offset_t address,
+ vm_purgable_t control,
+ int *state)
{
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (control == VM_PURGABLE_SET_STATE_FROM_KERNEL) {
+ /* not allowed from user-space */
return KERN_INVALID_ARGUMENT;
+ }
return vm_map_purgable_control(map,
- vm_map_trunc_page(address),
- control,
- state);
+ vm_map_trunc_page(address, PAGE_MASK),
+ control,
+ state);
}
-
+
/*
* Ordinarily, the right to allocate CPM is restricted
* to the host priv port). Set this variable to zero if
* you want to let any application allocate CPM.
*/
-unsigned int vm_allocate_cpm_privileged = 0;
+unsigned int vm_allocate_cpm_privileged = 0;
/*
* Allocate memory in the specified map, with the caveat that
*/
kern_return_t
vm_allocate_cpm(
- host_priv_t host_priv,
- vm_map_t map,
- vm_address_t *addr,
- vm_size_t size,
- int flags)
+ host_priv_t host_priv,
+ vm_map_t map,
+ vm_address_t *addr,
+ vm_size_t size,
+ int flags)
{
- vm_map_address_t map_addr;
- vm_map_size_t map_size;
- kern_return_t kr;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (vm_allocate_cpm_privileged && HOST_PRIV_NULL == host_priv)
+ if (vm_allocate_cpm_privileged && HOST_PRIV_NULL == host_priv) {
return KERN_INVALID_HOST;
+ }
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_addr = (vm_map_address_t)*addr;
map_size = (vm_map_size_t)size;
kr = vm_map_enter_cpm(map,
- &map_addr,
- map_size,
- flags);
+ &map_addr,
+ map_size,
+ flags);
*addr = CAST_DOWN(vm_address_t, map_addr);
return kr;
kern_return_t
mach_vm_page_query(
- vm_map_t map,
- mach_vm_offset_t offset,
- int *disposition,
- int *ref_count)
+ vm_map_t map,
+ mach_vm_offset_t offset,
+ int *disposition,
+ int *ref_count)
{
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
- return vm_map_page_info(map,
- vm_map_trunc_page(offset),
- disposition, ref_count);
+ return vm_map_page_query_internal(
+ map,
+ vm_map_trunc_page(offset, PAGE_MASK),
+ disposition, ref_count);
}
kern_return_t
vm_map_page_query(
- vm_map_t map,
- vm_offset_t offset,
- int *disposition,
- int *ref_count)
+ vm_map_t map,
+ vm_offset_t offset,
+ int *disposition,
+ int *ref_count)
+{
+ if (VM_MAP_NULL == map) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ return vm_map_page_query_internal(
+ map,
+ vm_map_trunc_page(offset, PAGE_MASK),
+ disposition, ref_count);
+}
+
+kern_return_t
+mach_vm_page_range_query(
+ vm_map_t map,
+ mach_vm_offset_t address,
+ mach_vm_size_t size,
+ mach_vm_address_t dispositions_addr,
+ mach_vm_size_t *dispositions_count)
+{
+ kern_return_t kr = KERN_SUCCESS;
+ int num_pages = 0, i = 0;
+ mach_vm_size_t curr_sz = 0, copy_sz = 0;
+ mach_vm_size_t disp_buf_req_size = 0, disp_buf_total_size = 0;
+ mach_msg_type_number_t count = 0;
+
+ void *info = NULL;
+ void *local_disp = NULL;;
+ vm_map_size_t info_size = 0, local_disp_size = 0;
+ mach_vm_offset_t start = 0, end = 0;
+
+ if (map == VM_MAP_NULL || dispositions_count == NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ disp_buf_req_size = (*dispositions_count * sizeof(int));
+ start = mach_vm_trunc_page(address);
+ end = mach_vm_round_page(address + size);
+
+ if (end < start) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if ((end - start) < size) {
+ /*
+ * Aligned size is less than unaligned size.
+ */
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (disp_buf_req_size == 0 || (end == start)) {
+ return KERN_SUCCESS;
+ }
+
+ /*
+ * For large requests, we will go through them
+ * MAX_PAGE_RANGE_QUERY chunk at a time.
+ */
+
+ curr_sz = MIN(end - start, MAX_PAGE_RANGE_QUERY);
+ num_pages = (int) (curr_sz >> PAGE_SHIFT);
+
+ info_size = num_pages * sizeof(vm_page_info_basic_data_t);
+ info = kalloc(info_size);
+
+ if (info == NULL) {
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ local_disp_size = num_pages * sizeof(int);
+ local_disp = kalloc(local_disp_size);
+
+ if (local_disp == NULL) {
+ kfree(info, info_size);
+ info = NULL;
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ while (size) {
+ count = VM_PAGE_INFO_BASIC_COUNT;
+ kr = vm_map_page_range_info_internal(
+ map,
+ start,
+ mach_vm_round_page(start + curr_sz),
+ VM_PAGE_INFO_BASIC,
+ (vm_page_info_t) info,
+ &count);
+
+ assert(kr == KERN_SUCCESS);
+
+ for (i = 0; i < num_pages; i++) {
+ ((int*)local_disp)[i] = ((vm_page_info_basic_t)info)[i].disposition;
+ }
+
+ copy_sz = MIN(disp_buf_req_size, num_pages * sizeof(int) /* an int per page */);
+ kr = copyout(local_disp, (mach_vm_address_t)dispositions_addr, copy_sz);
+
+ start += curr_sz;
+ disp_buf_req_size -= copy_sz;
+ disp_buf_total_size += copy_sz;
+
+ if (kr != 0) {
+ break;
+ }
+
+ if ((disp_buf_req_size == 0) || (curr_sz >= size)) {
+ /*
+ * We might have inspected the full range OR
+ * more than it esp. if the user passed in
+ * non-page aligned start/size and/or if we
+ * descended into a submap. We are done here.
+ */
+
+ size = 0;
+ } else {
+ dispositions_addr += copy_sz;
+
+ size -= curr_sz;
+
+ curr_sz = MIN(mach_vm_round_page(size), MAX_PAGE_RANGE_QUERY);
+ num_pages = (int)(curr_sz >> PAGE_SHIFT);
+ }
+ }
+
+ *dispositions_count = disp_buf_total_size / sizeof(int);
+
+ kfree(local_disp, local_disp_size);
+ local_disp = NULL;
+
+ kfree(info, info_size);
+ info = NULL;
+
+ return kr;
+}
+
+kern_return_t
+mach_vm_page_info(
+ vm_map_t map,
+ mach_vm_address_t address,
+ vm_page_info_flavor_t flavor,
+ vm_page_info_t info,
+ mach_msg_type_number_t *count)
{
- if (VM_MAP_NULL == map)
+ kern_return_t kr;
+
+ if (map == VM_MAP_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- return vm_map_page_info(map,
- vm_map_trunc_page(offset),
- disposition, ref_count);
+ kr = vm_map_page_info(map, address, flavor, info, count);
+ return kr;
}
/* map a (whole) upl into an address space */
kern_return_t
vm_upl_map(
- vm_map_t map,
- upl_t upl,
- vm_offset_t *dst_addr)
+ vm_map_t map,
+ upl_t upl,
+ vm_address_t *dst_addr)
{
- vm_map_offset_t map_addr;
- kern_return_t kr;
+ vm_map_offset_t map_addr;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
kr = vm_map_enter_upl(map, upl, &map_addr);
- *dst_addr = CAST_DOWN(vm_offset_t, map_addr);
+ *dst_addr = CAST_DOWN(vm_address_t, map_addr);
return kr;
}
kern_return_t
vm_upl_unmap(
- vm_map_t map,
- upl_t upl)
+ vm_map_t map,
+ upl_t upl)
{
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
- return (vm_map_remove_upl(map, upl));
+ return vm_map_remove_upl(map, upl);
}
/* Retrieve a upl for an object underlying an address range in a map */
kern_return_t
vm_map_get_upl(
- vm_map_t map,
- vm_map_offset_t map_offset,
- upl_size_t *upl_size,
- upl_t *upl,
- upl_page_info_array_t page_list,
- unsigned int *count,
- int *flags,
- int force_data_sync)
+ vm_map_t map,
+ vm_map_offset_t map_offset,
+ upl_size_t *upl_size,
+ upl_t *upl,
+ upl_page_info_array_t page_list,
+ unsigned int *count,
+ upl_control_flags_t *flags,
+ vm_tag_t tag,
+ int force_data_sync)
{
- int map_flags;
- kern_return_t kr;
+ upl_control_flags_t map_flags;
+ kern_return_t kr;
- if (VM_MAP_NULL == map)
+ if (VM_MAP_NULL == map) {
return KERN_INVALID_ARGUMENT;
+ }
map_flags = *flags & ~UPL_NOZEROFILL;
- if (force_data_sync)
+ if (force_data_sync) {
map_flags |= UPL_FORCE_DATA_SYNC;
+ }
kr = vm_map_create_upl(map,
- map_offset,
- upl_size,
- upl,
- page_list,
- count,
- &map_flags);
+ map_offset,
+ upl_size,
+ upl,
+ page_list,
+ count,
+ &map_flags,
+ tag);
*flags = (map_flags & ~UPL_FORCE_DATA_SYNC);
return kr;
}
-
-__private_extern__ kern_return_t
-mach_memory_entry_allocate(
- vm_named_entry_t *user_entry_p,
- ipc_port_t *user_handle_p); /* forward */
+#if CONFIG_EMBEDDED
+extern int proc_selfpid(void);
+extern char *proc_name_address(void *p);
+int cs_executable_mem_entry = 0;
+int log_executable_mem_entry = 0;
+#endif /* CONFIG_EMBEDDED */
/*
* mach_make_memory_entry_64
* somewhere else. Rather than doing it all at once (and
* without needing access to the other whole map).
*/
-
kern_return_t
mach_make_memory_entry_64(
- vm_map_t target_map,
- memory_object_size_t *size,
+ vm_map_t target_map,
+ memory_object_size_t *size,
memory_object_offset_t offset,
- vm_prot_t permission,
- ipc_port_t *object_handle,
- ipc_port_t parent_handle)
+ vm_prot_t permission,
+ ipc_port_t *object_handle,
+ ipc_port_t parent_handle)
+{
+ vm_named_entry_kernel_flags_t vmne_kflags;
+
+ if ((permission & MAP_MEM_FLAGS_MASK) & ~MAP_MEM_FLAGS_USER) {
+ /*
+ * Unknown flag: reject for forward compatibility.
+ */
+ return KERN_INVALID_VALUE;
+ }
+
+ vmne_kflags = VM_NAMED_ENTRY_KERNEL_FLAGS_NONE;
+ if (permission & MAP_MEM_LEDGER_TAGGED) {
+ vmne_kflags.vmnekf_ledger_tag = VM_LEDGER_TAG_DEFAULT;
+ }
+ return mach_make_memory_entry_internal(target_map,
+ size,
+ offset,
+ permission,
+ vmne_kflags,
+ object_handle,
+ parent_handle);
+}
+
+kern_return_t
+mach_make_memory_entry_internal(
+ vm_map_t target_map,
+ memory_object_size_t *size,
+ memory_object_offset_t offset,
+ vm_prot_t permission,
+ vm_named_entry_kernel_flags_t vmne_kflags,
+ ipc_port_t *object_handle,
+ ipc_port_t parent_handle)
{
- vm_map_version_t version;
- vm_named_entry_t parent_entry;
- vm_named_entry_t user_entry;
- ipc_port_t user_handle;
- kern_return_t kr;
- vm_map_t real_map;
+ vm_map_version_t version;
+ vm_named_entry_t parent_entry;
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
+ kern_return_t kr;
+ vm_map_t real_map;
/* needed for call to vm_map_lookup_locked */
- boolean_t wired;
- vm_object_offset_t obj_off;
- vm_prot_t prot;
- vm_map_offset_t lo_offset, hi_offset;
- vm_behavior_t behavior;
- vm_object_t object;
- vm_object_t shadow_object;
+ boolean_t wired;
+ boolean_t iskernel;
+ vm_object_offset_t obj_off;
+ vm_prot_t prot;
+ struct vm_object_fault_info fault_info = {};
+ vm_object_t object;
+ vm_object_t shadow_object;
/* needed for direct map entry manipulation */
- vm_map_entry_t map_entry;
- vm_map_entry_t next_entry;
- vm_map_t local_map;
- vm_map_t original_map = target_map;
- vm_map_size_t total_size;
- vm_map_size_t map_size;
- vm_map_offset_t map_offset;
- vm_map_offset_t local_offset;
- vm_object_size_t mappable_size;
-
- unsigned int access;
- vm_prot_t protections;
- unsigned int wimg_mode;
- boolean_t cache_attr = FALSE;
-
- if (((permission & 0x00FF0000) &
- ~(MAP_MEM_ONLY |
- MAP_MEM_NAMED_CREATE |
- MAP_MEM_PURGABLE |
- MAP_MEM_NAMED_REUSE))) {
+ vm_map_entry_t map_entry;
+ vm_map_entry_t next_entry;
+ vm_map_t local_map;
+ vm_map_t original_map = target_map;
+ vm_map_size_t total_size, map_size;
+ vm_map_offset_t map_start, map_end;
+ vm_map_offset_t local_offset;
+ vm_object_size_t mappable_size;
+
+ /*
+ * Stash the offset in the page for use by vm_map_enter_mem_object()
+ * in the VM_FLAGS_RETURN_DATA_ADDR/MAP_MEM_USE_DATA_ADDR case.
+ */
+ vm_object_offset_t offset_in_page;
+
+ unsigned int access;
+ vm_prot_t protections;
+ vm_prot_t original_protections, mask_protections;
+ unsigned int wimg_mode;
+
+ boolean_t force_shadow = FALSE;
+ boolean_t use_data_addr;
+ boolean_t use_4K_compat;
+#if VM_NAMED_ENTRY_LIST
+ int alias = -1;
+#endif /* VM_NAMED_ENTRY_LIST */
+
+ if ((permission & MAP_MEM_FLAGS_MASK) & ~MAP_MEM_FLAGS_ALL) {
/*
* Unknown flag: reject for forward compatibility.
*/
return KERN_INVALID_VALUE;
}
- if (parent_handle != IP_NULL &&
+ if (IP_VALID(parent_handle) &&
ip_kotype(parent_handle) == IKOT_NAMED_ENTRY) {
- parent_entry = (vm_named_entry_t) parent_handle->ip_kobject;
+ parent_entry = (vm_named_entry_t) ip_get_kobject(parent_handle);
} else {
parent_entry = NULL;
}
- protections = permission & VM_PROT_ALL;
+ if (parent_entry && parent_entry->is_copy) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ original_protections = permission & VM_PROT_ALL;
+ protections = original_protections;
+ mask_protections = permission & VM_PROT_IS_MASK;
access = GET_MAP_MEM(permission);
+ use_data_addr = ((permission & MAP_MEM_USE_DATA_ADDR) != 0);
+ use_4K_compat = ((permission & MAP_MEM_4K_DATA_ADDR) != 0);
user_handle = IP_NULL;
user_entry = NULL;
- map_offset = vm_map_trunc_page(offset);
- map_size = vm_map_round_page(*size);
+ map_start = vm_map_trunc_page(offset, PAGE_MASK);
if (permission & MAP_MEM_ONLY) {
- boolean_t parent_is_object;
+ boolean_t parent_is_object;
- if (parent_entry == NULL) {
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+
+ if (use_data_addr || use_4K_compat || parent_entry == NULL) {
return KERN_INVALID_ARGUMENT;
}
- parent_is_object = !(parent_entry->is_sub_map || parent_entry->is_pager);
+ parent_is_object = !parent_entry->is_sub_map;
object = parent_entry->backing.object;
- if(parent_is_object && object != VM_OBJECT_NULL)
+ if (parent_is_object && object != VM_OBJECT_NULL) {
wimg_mode = object->wimg_bits;
- else
- wimg_mode = VM_WIMG_DEFAULT;
- if((access != GET_MAP_MEM(parent_entry->protection)) &&
- !(parent_entry->protection & VM_PROT_WRITE)) {
+ } else {
+ wimg_mode = VM_WIMG_USE_DEFAULT;
+ }
+ if ((access != GET_MAP_MEM(parent_entry->protection)) &&
+ !(parent_entry->protection & VM_PROT_WRITE)) {
return KERN_INVALID_RIGHT;
}
- if(access == MAP_MEM_IO) {
- SET_MAP_MEM(access, parent_entry->protection);
- wimg_mode = VM_WIMG_IO;
- } else if (access == MAP_MEM_COPYBACK) {
- SET_MAP_MEM(access, parent_entry->protection);
- wimg_mode = VM_WIMG_DEFAULT;
- } else if (access == MAP_MEM_WTHRU) {
- SET_MAP_MEM(access, parent_entry->protection);
- wimg_mode = VM_WIMG_WTHRU;
- } else if (access == MAP_MEM_WCOMB) {
- SET_MAP_MEM(access, parent_entry->protection);
- wimg_mode = VM_WIMG_WCOMB;
- }
- if(parent_is_object && object &&
- (access != MAP_MEM_NOOP) &&
- (!(object->nophyscache))) {
- if(object->wimg_bits != wimg_mode) {
- vm_page_t p;
- if ((wimg_mode == VM_WIMG_IO)
- || (wimg_mode == VM_WIMG_WCOMB))
- cache_attr = TRUE;
- else
- cache_attr = FALSE;
- vm_object_lock(object);
- vm_object_paging_wait(object, THREAD_UNINT);
- object->wimg_bits = wimg_mode;
- queue_iterate(&object->memq,
- p, vm_page_t, listq) {
- if (!p->fictitious) {
- pmap_disconnect(p->phys_page);
- if (cache_attr)
- pmap_sync_page_attributes_phys(p->phys_page);
- }
- }
- vm_object_unlock(object);
+ vm_prot_to_wimg(access, &wimg_mode);
+ if (access != MAP_MEM_NOOP) {
+ SET_MAP_MEM(access, parent_entry->protection);
+ }
+ if (parent_is_object && object &&
+ (access != MAP_MEM_NOOP) &&
+ (!(object->nophyscache))) {
+ if (object->wimg_bits != wimg_mode) {
+ vm_object_lock(object);
+ vm_object_change_wimg_mode(object, wimg_mode);
+ vm_object_unlock(object);
}
}
- if (object_handle)
+ if (object_handle) {
*object_handle = IP_NULL;
+ }
return KERN_SUCCESS;
- }
+ } else if (permission & MAP_MEM_NAMED_CREATE) {
+ int ledger_flags = 0;
+ task_t owner;
+
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+
+ if (use_data_addr || use_4K_compat) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if(permission & MAP_MEM_NAMED_CREATE) {
kr = mach_memory_entry_allocate(&user_entry, &user_handle);
if (kr != KERN_SUCCESS) {
return KERN_FAILURE;
/*
* Force the creation of the VM object now.
*/
- if (map_size > (vm_map_size_t) VM_MAX_ADDRESS) {
+ if (map_size > (vm_map_size_t) ANON_MAX_SIZE) {
/*
- * LP64todo - for now, we can only allocate 4GB
+ * LP64todo - for now, we can only allocate 4GB-4096
* internal objects because the default pager can't
* page bigger ones. Remove this when it can.
*/
object = vm_object_allocate(map_size);
assert(object != VM_OBJECT_NULL);
- if (permission & MAP_MEM_PURGABLE) {
- if (! (permission & VM_PROT_WRITE)) {
- /* if we can't write, we can't purge */
+ /*
+ * XXX
+ * We use this path when we want to make sure that
+ * nobody messes with the object (coalesce, for
+ * example) before we map it.
+ * We might want to use these objects for transposition via
+ * vm_object_transpose() too, so we don't want any copy or
+ * shadow objects either...
+ */
+ object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
+ object->true_share = TRUE;
+
+ owner = current_task();
+ if ((permission & MAP_MEM_PURGABLE) ||
+ vmne_kflags.vmnekf_ledger_tag) {
+ assert(object->vo_owner == NULL);
+ assert(object->resident_page_count == 0);
+ assert(object->wired_page_count == 0);
+ assert(owner != TASK_NULL);
+ if (vmne_kflags.vmnekf_ledger_no_footprint) {
+ ledger_flags |= VM_LEDGER_FLAG_NO_FOOTPRINT;
+ object->vo_no_footprint = TRUE;
+ }
+ if (permission & MAP_MEM_PURGABLE) {
+ if (!(permission & VM_PROT_WRITE)) {
+ /* if we can't write, we can't purge */
+ vm_object_deallocate(object);
+ kr = KERN_INVALID_ARGUMENT;
+ goto make_mem_done;
+ }
+ object->purgable = VM_PURGABLE_NONVOLATILE;
+ if (permission & MAP_MEM_PURGABLE_KERNEL_ONLY) {
+ object->purgeable_only_by_kernel = TRUE;
+ }
+#if __arm64__
+ if (owner->task_legacy_footprint) {
+ /*
+ * For ios11, we failed to account for
+ * this memory. Keep doing that for
+ * legacy apps (built before ios12),
+ * for backwards compatibility's sake...
+ */
+ owner = kernel_task;
+ }
+#endif /* __arm64__ */
+ vm_object_lock(object);
+ vm_purgeable_nonvolatile_enqueue(object, owner);
+ vm_object_unlock(object);
+ }
+ }
+
+ if (vmne_kflags.vmnekf_ledger_tag) {
+ /*
+ * Bill this object to the current task's
+ * ledgers for the given tag.
+ */
+ if (vmne_kflags.vmnekf_ledger_no_footprint) {
+ ledger_flags |= VM_LEDGER_FLAG_NO_FOOTPRINT;
+ }
+ vm_object_lock(object);
+ object->vo_ledger_tag = vmne_kflags.vmnekf_ledger_tag;
+ kr = vm_object_ownership_change(
+ object,
+ vmne_kflags.vmnekf_ledger_tag,
+ owner, /* new owner */
+ ledger_flags,
+ FALSE); /* task_objq locked? */
+ vm_object_unlock(object);
+ if (kr != KERN_SUCCESS) {
vm_object_deallocate(object);
- kr = KERN_INVALID_ARGUMENT;
goto make_mem_done;
}
- object->purgable = VM_OBJECT_PURGABLE_NONVOLATILE;
}
+#if CONFIG_SECLUDED_MEMORY
+ if (secluded_for_iokit && /* global boot-arg */
+ ((permission & MAP_MEM_GRAB_SECLUDED)
+#if 11
+ /* XXX FBDP for my testing only */
+ || (secluded_for_fbdp && map_size == 97550336)
+#endif
+ )) {
+#if 11
+ if (!(permission & MAP_MEM_GRAB_SECLUDED) &&
+ secluded_for_fbdp) {
+ printf("FBDP: object %p size %lld can grab secluded\n", object, (uint64_t) map_size);
+ }
+#endif
+ object->can_grab_secluded = TRUE;
+ assert(!object->eligible_for_secluded);
+ }
+#endif /* CONFIG_SECLUDED_MEMORY */
+
/*
* The VM object is brand new and nobody else knows about it,
* so we don't need to lock it.
*/
wimg_mode = object->wimg_bits;
- if (access == MAP_MEM_IO) {
- wimg_mode = VM_WIMG_IO;
- } else if (access == MAP_MEM_COPYBACK) {
- wimg_mode = VM_WIMG_DEFAULT;
- } else if (access == MAP_MEM_WTHRU) {
- wimg_mode = VM_WIMG_WTHRU;
- } else if (access == MAP_MEM_WCOMB) {
- wimg_mode = VM_WIMG_WCOMB;
- }
+ vm_prot_to_wimg(access, &wimg_mode);
if (access != MAP_MEM_NOOP) {
object->wimg_bits = wimg_mode;
}
- /* the object has no pages, so no WIMG bits to update here */
- /*
- * XXX
- * We use this path when we want to make sure that
- * nobody messes with the object (coalesce, for
- * example) before we map it.
- * We might want to use these objects for transposition via
- * vm_object_transpose() too, so we don't want any copy or
- * shadow objects either...
- */
- object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
+ /* the object has no pages, so no WIMG bits to update here */
user_entry->backing.object = object;
user_entry->internal = TRUE;
user_entry->is_sub_map = FALSE;
- user_entry->is_pager = FALSE;
user_entry->offset = 0;
+ user_entry->data_offset = 0;
user_entry->protection = protections;
SET_MAP_MEM(access, user_entry->protection);
user_entry->size = map_size;
/* user_object pager and internal fields are not used */
/* when the object field is filled in. */
- *size = CAST_DOWN(vm_size_t, map_size);
+ *size = CAST_DOWN(vm_size_t, (user_entry->size -
+ user_entry->data_offset));
*object_handle = user_handle;
return KERN_SUCCESS;
}
- if (parent_entry == NULL ||
- (permission & MAP_MEM_NAMED_REUSE)) {
-
- /* Create a named object based on address range within the task map */
- /* Go find the object at given address */
+ if (permission & MAP_MEM_VM_COPY) {
+ vm_map_copy_t copy;
-redo_lookup:
- vm_map_lock_read(target_map);
+ if (target_map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
- /* get the object associated with the target address */
- /* note we check the permission of the range against */
- /* that requested by the caller */
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+ if (use_data_addr || use_4K_compat) {
+ offset_in_page = offset - map_start;
+ if (use_4K_compat) {
+ offset_in_page &= ~((signed)(0xFFF));
+ }
+ } else {
+ offset_in_page = 0;
+ }
- kr = vm_map_lookup_locked(&target_map, map_offset,
- protections, &version,
- &object, &obj_off, &prot, &wired, &behavior,
- &lo_offset, &hi_offset, &real_map);
+ kr = vm_map_copyin_internal(target_map,
+ map_start,
+ map_size,
+ VM_MAP_COPYIN_ENTRY_LIST,
+ ©);
if (kr != KERN_SUCCESS) {
- vm_map_unlock_read(target_map);
- goto make_mem_done;
+ return kr;
}
- if (((prot & protections) != protections)
- || (object == kernel_object)) {
- kr = KERN_INVALID_RIGHT;
- vm_object_unlock(object);
- vm_map_unlock_read(target_map);
- if(real_map != target_map)
- vm_map_unlock_read(real_map);
- if(object == kernel_object) {
- printf("Warning: Attempt to create a named"
- " entry from the kernel_object\n");
- }
- goto make_mem_done;
+
+ kr = mach_memory_entry_allocate(&user_entry, &user_handle);
+ if (kr != KERN_SUCCESS) {
+ vm_map_copy_discard(copy);
+ return KERN_FAILURE;
}
- /* We have an object, now check to see if this object */
- /* is suitable. If not, create a shadow and share that */
+ user_entry->backing.copy = copy;
+ user_entry->internal = FALSE;
+ user_entry->is_sub_map = FALSE;
+ user_entry->is_copy = TRUE;
+ user_entry->offset = 0;
+ user_entry->protection = protections;
+ user_entry->size = map_size;
+ user_entry->data_offset = offset_in_page;
- /*
- * We have to unlock the VM object to avoid deadlocking with
- * a VM map lock (the lock ordering is map, the object), if we
- * need to modify the VM map to create a shadow object. Since
- * we might release the VM map lock below anyway, we have
- * to release the VM map lock now.
- * XXX FBDP There must be a way to avoid this double lookup...
- *
- * Take an extra reference on the VM object to make sure it's
- * not going to disappear.
- */
- vm_object_reference_locked(object); /* extra ref to hold obj */
- vm_object_unlock(object);
+ *size = CAST_DOWN(vm_size_t, (user_entry->size -
+ user_entry->data_offset));
+ *object_handle = user_handle;
+ return KERN_SUCCESS;
+ }
- local_map = original_map;
- local_offset = map_offset;
- if(target_map != local_map) {
- vm_map_unlock_read(target_map);
- if(real_map != target_map)
- vm_map_unlock_read(real_map);
- vm_map_lock_read(local_map);
- target_map = local_map;
- real_map = local_map;
+ if (permission & MAP_MEM_VM_SHARE) {
+ vm_map_copy_t copy;
+ vm_prot_t cur_prot, max_prot;
+
+ if (target_map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
}
- while(TRUE) {
- if(!vm_map_lookup_entry(local_map,
- local_offset, &map_entry)) {
- kr = KERN_INVALID_ARGUMENT;
- vm_map_unlock_read(target_map);
- if(real_map != target_map)
+
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+ if (use_data_addr || use_4K_compat) {
+ offset_in_page = offset - map_start;
+ if (use_4K_compat) {
+ offset_in_page &= ~((signed)(0xFFF));
+ }
+ } else {
+ offset_in_page = 0;
+ }
+
+ cur_prot = VM_PROT_ALL;
+ kr = vm_map_copy_extract(target_map,
+ map_start,
+ map_size,
+ ©,
+ &cur_prot,
+ &max_prot);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ if (mask_protections) {
+ /*
+ * We just want as much of "original_protections"
+ * as we can get out of the actual "cur_prot".
+ */
+ protections &= cur_prot;
+ if (protections == VM_PROT_NONE) {
+ /* no access at all: fail */
+ vm_map_copy_discard(copy);
+ return KERN_PROTECTION_FAILURE;
+ }
+ } else {
+ /*
+ * We want exactly "original_protections"
+ * out of "cur_prot".
+ */
+ if ((cur_prot & protections) != protections) {
+ vm_map_copy_discard(copy);
+ return KERN_PROTECTION_FAILURE;
+ }
+ }
+
+ kr = mach_memory_entry_allocate(&user_entry, &user_handle);
+ if (kr != KERN_SUCCESS) {
+ vm_map_copy_discard(copy);
+ return KERN_FAILURE;
+ }
+
+ user_entry->backing.copy = copy;
+ user_entry->internal = FALSE;
+ user_entry->is_sub_map = FALSE;
+ user_entry->is_copy = TRUE;
+ user_entry->offset = 0;
+ user_entry->protection = protections;
+ user_entry->size = map_size;
+ user_entry->data_offset = offset_in_page;
+
+ *size = CAST_DOWN(vm_size_t, (user_entry->size -
+ user_entry->data_offset));
+ *object_handle = user_handle;
+ return KERN_SUCCESS;
+ }
+
+ if (parent_entry == NULL ||
+ (permission & MAP_MEM_NAMED_REUSE)) {
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+ if (use_data_addr || use_4K_compat) {
+ offset_in_page = offset - map_start;
+ if (use_4K_compat) {
+ offset_in_page &= ~((signed)(0xFFF));
+ }
+ } else {
+ offset_in_page = 0;
+ }
+
+ /* Create a named object based on address range within the task map */
+ /* Go find the object at given address */
+
+ if (target_map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
+
+redo_lookup:
+ protections = original_protections;
+ vm_map_lock_read(target_map);
+
+ /* get the object associated with the target address */
+ /* note we check the permission of the range against */
+ /* that requested by the caller */
+
+ kr = vm_map_lookup_locked(&target_map, map_start,
+ protections | mask_protections,
+ OBJECT_LOCK_EXCLUSIVE, &version,
+ &object, &obj_off, &prot, &wired,
+ &fault_info,
+ &real_map);
+ if (kr != KERN_SUCCESS) {
+ vm_map_unlock_read(target_map);
+ goto make_mem_done;
+ }
+ if (mask_protections) {
+ /*
+ * The caller asked us to use the "protections" as
+ * a mask, so restrict "protections" to what this
+ * mapping actually allows.
+ */
+ protections &= prot;
+ }
+#if CONFIG_EMBEDDED
+ /*
+ * Wiring would copy the pages to a shadow object.
+ * The shadow object would not be code-signed so
+ * attempting to execute code from these copied pages
+ * would trigger a code-signing violation.
+ */
+ if (prot & VM_PROT_EXECUTE) {
+ if (log_executable_mem_entry) {
+ void *bsd_info;
+ bsd_info = current_task()->bsd_info;
+ printf("pid %d[%s] making memory entry out of "
+ "executable range from 0x%llx to 0x%llx:"
+ "might cause code-signing issues "
+ "later\n",
+ proc_selfpid(),
+ (bsd_info != NULL
+ ? proc_name_address(bsd_info)
+ : "?"),
+ (uint64_t) map_start,
+ (uint64_t) map_end);
+ }
+ DTRACE_VM2(cs_executable_mem_entry,
+ uint64_t, (uint64_t)map_start,
+ uint64_t, (uint64_t)map_end);
+ cs_executable_mem_entry++;
+
+#if 11
+ /*
+ * We don't know how the memory entry will be used.
+ * It might never get wired and might not cause any
+ * trouble, so let's not reject this request...
+ */
+#else /* 11 */
+ kr = KERN_PROTECTION_FAILURE;
+ vm_object_unlock(object);
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
vm_map_unlock_read(real_map);
- vm_object_deallocate(object); /* release extra ref */
- object = VM_OBJECT_NULL;
- goto make_mem_done;
- }
- if(!(map_entry->is_sub_map)) {
- if(map_entry->object.vm_object != object) {
- kr = KERN_INVALID_ARGUMENT;
- vm_map_unlock_read(target_map);
- if(real_map != target_map)
+ }
+ goto make_mem_done;
+#endif /* 11 */
+ }
+#endif /* CONFIG_EMBEDDED */
+
+ if (((prot & protections) != protections)
+ || (object == kernel_object)) {
+ kr = KERN_INVALID_RIGHT;
+ vm_object_unlock(object);
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
+ vm_map_unlock_read(real_map);
+ }
+ if (object == kernel_object) {
+ printf("Warning: Attempt to create a named"
+ " entry from the kernel_object\n");
+ }
+ goto make_mem_done;
+ }
+
+ /* We have an object, now check to see if this object */
+ /* is suitable. If not, create a shadow and share that */
+
+ /*
+ * We have to unlock the VM object to avoid deadlocking with
+ * a VM map lock (the lock ordering is map, the object), if we
+ * need to modify the VM map to create a shadow object. Since
+ * we might release the VM map lock below anyway, we have
+ * to release the VM map lock now.
+ * XXX FBDP There must be a way to avoid this double lookup...
+ *
+ * Take an extra reference on the VM object to make sure it's
+ * not going to disappear.
+ */
+ vm_object_reference_locked(object); /* extra ref to hold obj */
+ vm_object_unlock(object);
+
+ local_map = original_map;
+ local_offset = map_start;
+ if (target_map != local_map) {
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
vm_map_unlock_read(real_map);
- vm_object_deallocate(object); /* release extra ref */
- object = VM_OBJECT_NULL;
- goto make_mem_done;
- }
- break;
- } else {
- vm_map_t tmap;
- tmap = local_map;
- local_map = map_entry->object.sub_map;
-
+ }
vm_map_lock_read(local_map);
- vm_map_unlock_read(tmap);
target_map = local_map;
real_map = local_map;
- local_offset = local_offset - map_entry->vme_start;
- local_offset += map_entry->offset;
- }
+ }
+ while (TRUE) {
+ if (!vm_map_lookup_entry(local_map,
+ local_offset, &map_entry)) {
+ kr = KERN_INVALID_ARGUMENT;
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
+ vm_map_unlock_read(real_map);
+ }
+ vm_object_deallocate(object); /* release extra ref */
+ object = VM_OBJECT_NULL;
+ goto make_mem_done;
+ }
+ iskernel = (local_map->pmap == kernel_pmap);
+ if (!(map_entry->is_sub_map)) {
+ if (VME_OBJECT(map_entry) != object) {
+ kr = KERN_INVALID_ARGUMENT;
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
+ vm_map_unlock_read(real_map);
+ }
+ vm_object_deallocate(object); /* release extra ref */
+ object = VM_OBJECT_NULL;
+ goto make_mem_done;
+ }
+ break;
+ } else {
+ vm_map_t tmap;
+ tmap = local_map;
+ local_map = VME_SUBMAP(map_entry);
+
+ vm_map_lock_read(local_map);
+ vm_map_unlock_read(tmap);
+ target_map = local_map;
+ real_map = local_map;
+ local_offset = local_offset - map_entry->vme_start;
+ local_offset += VME_OFFSET(map_entry);
+ }
}
+#if VM_NAMED_ENTRY_LIST
+ alias = VME_ALIAS(map_entry);
+#endif /* VM_NAMED_ENTRY_LIST */
+
/*
* We found the VM map entry, lock the VM object again.
*/
vm_object_lock(object);
- if(map_entry->wired_count) {
- /* JMM - The check below should be reworked instead. */
- object->true_share = TRUE;
- }
- if(((map_entry->max_protection) & protections) != protections) {
- kr = KERN_INVALID_RIGHT;
- vm_object_unlock(object);
- vm_map_unlock_read(target_map);
- if(real_map != target_map)
+ if (map_entry->wired_count) {
+ /* JMM - The check below should be reworked instead. */
+ object->true_share = TRUE;
+ }
+ if (mask_protections) {
+ /*
+ * The caller asked us to use the "protections" as
+ * a mask, so restrict "protections" to what this
+ * mapping actually allows.
+ */
+ protections &= map_entry->max_protection;
+ }
+ if (((map_entry->max_protection) & protections) != protections) {
+ kr = KERN_INVALID_RIGHT;
+ vm_object_unlock(object);
+ vm_map_unlock_read(target_map);
+ if (real_map != target_map) {
vm_map_unlock_read(real_map);
- vm_object_deallocate(object);
- object = VM_OBJECT_NULL;
- goto make_mem_done;
+ }
+ vm_object_deallocate(object);
+ object = VM_OBJECT_NULL;
+ goto make_mem_done;
}
- mappable_size = hi_offset - obj_off;
+ mappable_size = fault_info.hi_offset - obj_off;
total_size = map_entry->vme_end - map_entry->vme_start;
- if(map_size > mappable_size) {
+ if (map_size > mappable_size) {
/* try to extend mappable size if the entries */
/* following are from the same object and are */
/* compatible */
next_entry = map_entry->vme_next;
/* lets see if the next map entry is still */
/* pointing at this object and is contiguous */
- while(map_size > mappable_size) {
- if((next_entry->object.vm_object == object) &&
- (next_entry->vme_start ==
- next_entry->vme_prev->vme_end) &&
- (next_entry->offset ==
- next_entry->vme_prev->offset +
- (next_entry->vme_prev->vme_end -
- next_entry->vme_prev->vme_start))) {
- if(((next_entry->max_protection)
- & protections) != protections) {
- break;
+ while (map_size > mappable_size) {
+ if ((VME_OBJECT(next_entry) == object) &&
+ (next_entry->vme_start ==
+ next_entry->vme_prev->vme_end) &&
+ (VME_OFFSET(next_entry) ==
+ (VME_OFFSET(next_entry->vme_prev) +
+ (next_entry->vme_prev->vme_end -
+ next_entry->vme_prev->vme_start)))) {
+ if (mask_protections) {
+ /*
+ * The caller asked us to use
+ * the "protections" as a mask,
+ * so restrict "protections" to
+ * what this mapping actually
+ * allows.
+ */
+ protections &= next_entry->max_protection;
+ }
+ if ((next_entry->wired_count) &&
+ (map_entry->wired_count == 0)) {
+ break;
+ }
+ if (((next_entry->max_protection)
+ & protections) != protections) {
+ break;
}
if (next_entry->needs_copy !=
- map_entry->needs_copy)
+ map_entry->needs_copy) {
break;
+ }
mappable_size += next_entry->vme_end
- - next_entry->vme_start;
+ - next_entry->vme_start;
total_size += next_entry->vme_end
- - next_entry->vme_start;
+ - next_entry->vme_start;
next_entry = next_entry->vme_next;
} else {
break;
}
-
}
}
- if(object->internal) {
- /* vm_map_lookup_locked will create a shadow if */
- /* needs_copy is set but does not check for the */
- /* other two conditions shown. It is important to */
+ /* vm_map_entry_should_cow_for_true_share() checks for malloc tags,
+ * never true in kernel */
+ if (!iskernel && vm_map_entry_should_cow_for_true_share(map_entry) &&
+ object->vo_size > map_size &&
+ map_size != 0) {
+ /*
+ * Set up the targeted range for copy-on-write to
+ * limit the impact of "true_share"/"copy_delay" to
+ * that range instead of the entire VM object...
+ */
+
+ vm_object_unlock(object);
+ if (vm_map_lock_read_to_write(target_map)) {
+ vm_object_deallocate(object);
+ target_map = original_map;
+ goto redo_lookup;
+ }
+
+ vm_map_clip_start(target_map,
+ map_entry,
+ vm_map_trunc_page(map_start,
+ VM_MAP_PAGE_MASK(target_map)));
+ vm_map_clip_end(target_map,
+ map_entry,
+ (vm_map_round_page(map_end,
+ VM_MAP_PAGE_MASK(target_map))));
+ force_shadow = TRUE;
+
+ if ((map_entry->vme_end - offset) < map_size) {
+ map_size = map_entry->vme_end - map_start;
+ }
+ total_size = map_entry->vme_end - map_entry->vme_start;
+
+ vm_map_lock_write_to_read(target_map);
+ vm_object_lock(object);
+ }
+
+ if (object->internal) {
+ /* vm_map_lookup_locked will create a shadow if */
+ /* needs_copy is set but does not check for the */
+ /* other two conditions shown. It is important to */
/* set up an object which will not be pulled from */
/* under us. */
- if ((map_entry->needs_copy || object->shadowed ||
- (object->size > total_size))
- && !object->true_share) {
+ if (force_shadow ||
+ ((map_entry->needs_copy ||
+ object->shadowed ||
+ (object->vo_size > total_size &&
+ (VME_OFFSET(map_entry) != 0 ||
+ object->vo_size >
+ vm_map_round_page(total_size,
+ VM_MAP_PAGE_MASK(target_map)))))
+ && !object->true_share
+ && object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC)) {
/*
* We have to unlock the VM object before
* trying to upgrade the VM map lock, to
*/
vm_object_unlock(object);
- if (vm_map_lock_read_to_write(target_map)) {
+ if (vm_map_lock_read_to_write(target_map)) {
/*
* We couldn't upgrade our VM map lock
* from "read" to "write" and we lost
*/
vm_object_deallocate(object); /* extra ref */
target_map = original_map;
- goto redo_lookup;
- }
+ goto redo_lookup;
+ }
+#if 00
vm_object_lock(object);
+#endif
- /*
+ /*
* JMM - We need to avoid coming here when the object
* is wired by anybody, not just the current map. Why
* couldn't we use the standard vm_object_copy_quickly()
* approach here?
*/
-
- /* create a shadow object */
- vm_object_shadow(&map_entry->object.vm_object,
- &map_entry->offset, total_size);
- shadow_object = map_entry->object.vm_object;
+
+ /* create a shadow object */
+ VME_OBJECT_SHADOW(map_entry, total_size);
+ shadow_object = VME_OBJECT(map_entry);
+#if 00
vm_object_unlock(object);
+#endif
+
+ prot = map_entry->protection & ~VM_PROT_WRITE;
+
+ if (override_nx(target_map,
+ VME_ALIAS(map_entry))
+ && prot) {
+ prot |= VM_PROT_EXECUTE;
+ }
vm_object_pmap_protect(
- object, map_entry->offset,
+ object, VME_OFFSET(map_entry),
total_size,
- ((map_entry->is_shared
- || target_map->mapped)
- ? PMAP_NULL :
- target_map->pmap),
+ ((map_entry->is_shared
+ || target_map->mapped_in_other_pmaps)
+ ? PMAP_NULL :
+ target_map->pmap),
map_entry->vme_start,
- map_entry->protection & ~VM_PROT_WRITE);
- total_size -= (map_entry->vme_end
- - map_entry->vme_start);
+ prot);
+ total_size -= (map_entry->vme_end
+ - map_entry->vme_start);
next_entry = map_entry->vme_next;
map_entry->needs_copy = FALSE;
+
+ vm_object_lock(shadow_object);
while (total_size) {
- if(next_entry->object.vm_object == object) {
- shadow_object->ref_count++;
- vm_object_res_reference(shadow_object);
- next_entry->object.vm_object
- = shadow_object;
- vm_object_deallocate(object);
- next_entry->offset
- = next_entry->vme_prev->offset +
- (next_entry->vme_prev->vme_end
- - next_entry->vme_prev->vme_start);
+ assert((next_entry->wired_count == 0) ||
+ (map_entry->wired_count));
+
+ if (VME_OBJECT(next_entry) == object) {
+ vm_object_reference_locked(shadow_object);
+ VME_OBJECT_SET(next_entry,
+ shadow_object);
+ vm_object_deallocate(object);
+ VME_OFFSET_SET(
+ next_entry,
+ (VME_OFFSET(next_entry->vme_prev) +
+ (next_entry->vme_prev->vme_end
+ - next_entry->vme_prev->vme_start)));
+ next_entry->use_pmap = TRUE;
next_entry->needs_copy = FALSE;
} else {
panic("mach_make_memory_entry_64:"
- " map entries out of sync\n");
+ " map entries out of sync\n");
}
- total_size -=
- next_entry->vme_end
- - next_entry->vme_start;
+ total_size -=
+ next_entry->vme_end
+ - next_entry->vme_start;
next_entry = next_entry->vme_next;
}
vm_object_deallocate(object); /* extra ref */
object = shadow_object;
- obj_off = (local_offset - map_entry->vme_start)
- + map_entry->offset;
+ obj_off = ((local_offset - map_entry->vme_start)
+ + VME_OFFSET(map_entry));
vm_map_lock_write_to_read(target_map);
- vm_object_lock(object);
-
- }
- }
+ }
+ }
/* note: in the future we can (if necessary) allow for */
/* memory object lists, this will better support */
/* against delayed copy, etc. is mostly defensive. */
wimg_mode = object->wimg_bits;
- if(!(object->nophyscache)) {
- if(access == MAP_MEM_IO) {
- wimg_mode = VM_WIMG_IO;
- } else if (access == MAP_MEM_COPYBACK) {
- wimg_mode = VM_WIMG_USE_DEFAULT;
- } else if (access == MAP_MEM_WTHRU) {
- wimg_mode = VM_WIMG_WTHRU;
- } else if (access == MAP_MEM_WCOMB) {
- wimg_mode = VM_WIMG_WCOMB;
- }
+ if (!(object->nophyscache)) {
+ vm_prot_to_wimg(access, &wimg_mode);
+ }
+
+#if VM_OBJECT_TRACKING_OP_TRUESHARE
+ if (!object->true_share &&
+ vm_object_tracking_inited) {
+ void *bt[VM_OBJECT_TRACKING_BTDEPTH];
+ int num = 0;
+
+ num = OSBacktrace(bt,
+ VM_OBJECT_TRACKING_BTDEPTH);
+ btlog_add_entry(vm_object_tracking_btlog,
+ object,
+ VM_OBJECT_TRACKING_OP_TRUESHARE,
+ bt,
+ num);
}
+#endif /* VM_OBJECT_TRACKING_OP_TRUESHARE */
+ vm_object_lock_assert_exclusive(object);
object->true_share = TRUE;
- if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC)
+ if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) {
object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
+ }
/*
* The memory entry now points to this VM object and we
*/
vm_map_unlock_read(target_map);
- if(real_map != target_map)
+ if (real_map != target_map) {
vm_map_unlock_read(real_map);
+ }
- if(object->wimg_bits != wimg_mode) {
- vm_page_t p;
-
- vm_object_paging_wait(object, THREAD_UNINT);
-
- if ((wimg_mode == VM_WIMG_IO)
- || (wimg_mode == VM_WIMG_WCOMB))
- cache_attr = TRUE;
- else
- cache_attr = FALSE;
-
- queue_iterate(&object->memq,
- p, vm_page_t, listq) {
- if (!p->fictitious) {
- pmap_disconnect(p->phys_page);
- if (cache_attr)
- pmap_sync_page_attributes_phys(p->phys_page);
- }
- }
- object->wimg_bits = wimg_mode;
+ if (object->wimg_bits != wimg_mode) {
+ vm_object_change_wimg_mode(object, wimg_mode);
}
/* the size of mapped entry that overlaps with our region */
/* offset of our beg addr within entry */
/* it corresponds to this: */
- if(map_size > mappable_size)
+ if (map_size > mappable_size) {
map_size = mappable_size;
+ }
if (permission & MAP_MEM_NAMED_REUSE) {
/*
parent_entry->backing.object == object &&
parent_entry->internal == object->internal &&
parent_entry->is_sub_map == FALSE &&
- parent_entry->is_pager == FALSE &&
parent_entry->offset == obj_off &&
parent_entry->protection == protections &&
- parent_entry->size == map_size) {
+ parent_entry->size == map_size &&
+ ((!(use_data_addr || use_4K_compat) &&
+ (parent_entry->data_offset == 0)) ||
+ ((use_data_addr || use_4K_compat) &&
+ (parent_entry->data_offset == offset_in_page)))) {
/*
* We have a match: re-use "parent_entry".
*/
/* parent_entry->ref_count++; XXX ? */
/* Get an extra send-right on handle */
ipc_port_copy_send(parent_handle);
+
+ *size = CAST_DOWN(vm_size_t,
+ (parent_entry->size -
+ parent_entry->data_offset));
*object_handle = parent_handle;
return KERN_SUCCESS;
} else {
user_entry->backing.object = object;
user_entry->internal = object->internal;
user_entry->is_sub_map = FALSE;
- user_entry->is_pager = FALSE;
user_entry->offset = obj_off;
- user_entry->protection = permission;
+ user_entry->data_offset = offset_in_page;
+ user_entry->protection = protections;
+ SET_MAP_MEM(GET_MAP_MEM(permission), user_entry->protection);
user_entry->size = map_size;
+#if VM_NAMED_ENTRY_LIST
+ user_entry->named_entry_alias = alias;
+#endif /* VM_NAMED_ENTRY_LIST */
/* user_object pager and internal fields are not used */
/* when the object field is filled in. */
- *size = CAST_DOWN(vm_size_t, map_size);
+ *size = CAST_DOWN(vm_size_t, (user_entry->size -
+ user_entry->data_offset));
*object_handle = user_handle;
return KERN_SUCCESS;
-
} else {
/* The new object will be base on an existing named object */
-
if (parent_entry == NULL) {
kr = KERN_INVALID_ARGUMENT;
goto make_mem_done;
}
- if((offset + map_size) > parent_entry->size) {
- kr = KERN_INVALID_ARGUMENT;
- goto make_mem_done;
+
+ if (use_data_addr || use_4K_compat) {
+ /*
+ * submaps and pagers should only be accessible from within
+ * the kernel, which shouldn't use the data address flag, so can fail here.
+ */
+ if (parent_entry->is_sub_map) {
+ panic("Shouldn't be using data address with a parent entry that is a submap.");
+ }
+ /*
+ * Account for offset to data in parent entry and
+ * compute our own offset to data.
+ */
+ if ((offset + *size + parent_entry->data_offset) > parent_entry->size) {
+ kr = KERN_INVALID_ARGUMENT;
+ goto make_mem_done;
+ }
+
+ map_start = vm_map_trunc_page(offset + parent_entry->data_offset, PAGE_MASK);
+ offset_in_page = (offset + parent_entry->data_offset) - map_start;
+ if (use_4K_compat) {
+ offset_in_page &= ~((signed)(0xFFF));
+ }
+ map_end = vm_map_round_page(offset + parent_entry->data_offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+ } else {
+ map_end = vm_map_round_page(offset + *size, PAGE_MASK);
+ map_size = map_end - map_start;
+ offset_in_page = 0;
+
+ if ((offset + map_size) > parent_entry->size) {
+ kr = KERN_INVALID_ARGUMENT;
+ goto make_mem_done;
+ }
}
- if((protections & parent_entry->protection) != protections) {
+ if (mask_protections) {
+ /*
+ * The caller asked us to use the "protections" as
+ * a mask, so restrict "protections" to what this
+ * mapping actually allows.
+ */
+ protections &= parent_entry->protection;
+ }
+ if ((protections & parent_entry->protection) != protections) {
kr = KERN_PROTECTION_FAILURE;
goto make_mem_done;
}
}
user_entry->size = map_size;
- user_entry->offset = parent_entry->offset + map_offset;
+ user_entry->offset = parent_entry->offset + map_start;
+ user_entry->data_offset = offset_in_page;
user_entry->is_sub_map = parent_entry->is_sub_map;
- user_entry->is_pager = parent_entry->is_pager;
+ user_entry->is_copy = parent_entry->is_copy;
user_entry->internal = parent_entry->internal;
user_entry->protection = protections;
- if(access != MAP_MEM_NOOP) {
- SET_MAP_MEM(access, user_entry->protection);
+ if (access != MAP_MEM_NOOP) {
+ SET_MAP_MEM(access, user_entry->protection);
}
- if(parent_entry->is_sub_map) {
- user_entry->backing.map = parent_entry->backing.map;
- vm_map_lock(user_entry->backing.map);
- user_entry->backing.map->ref_count++;
- vm_map_unlock(user_entry->backing.map);
- }
- else if (parent_entry->is_pager) {
- user_entry->backing.pager = parent_entry->backing.pager;
- /* JMM - don't we need a reference here? */
+ if (parent_entry->is_sub_map) {
+ vm_map_t map = parent_entry->backing.map;
+ user_entry->backing.map = map;
+ lck_mtx_lock(&map->s_lock);
+ os_ref_retain_locked(&map->map_refcnt);
+ lck_mtx_unlock(&map->s_lock);
} else {
- object = parent_entry->backing.object;
- assert(object != VM_OBJECT_NULL);
- user_entry->backing.object = object;
- /* we now point to this object, hold on */
- vm_object_reference(object);
- vm_object_lock(object);
- object->true_share = TRUE;
- if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC)
- object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
- vm_object_unlock(object);
+ object = parent_entry->backing.object;
+ assert(object != VM_OBJECT_NULL);
+ user_entry->backing.object = object;
+ /* we now point to this object, hold on */
+ vm_object_lock(object);
+ vm_object_reference_locked(object);
+#if VM_OBJECT_TRACKING_OP_TRUESHARE
+ if (!object->true_share &&
+ vm_object_tracking_inited) {
+ void *bt[VM_OBJECT_TRACKING_BTDEPTH];
+ int num = 0;
+
+ num = OSBacktrace(bt,
+ VM_OBJECT_TRACKING_BTDEPTH);
+ btlog_add_entry(vm_object_tracking_btlog,
+ object,
+ VM_OBJECT_TRACKING_OP_TRUESHARE,
+ bt,
+ num);
+ }
+#endif /* VM_OBJECT_TRACKING_OP_TRUESHARE */
+
+ object->true_share = TRUE;
+ if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) {
+ object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
+ }
+ vm_object_unlock(object);
}
- *size = CAST_DOWN(vm_size_t, map_size);
+ *size = CAST_DOWN(vm_size_t, (user_entry->size -
+ user_entry->data_offset));
*object_handle = user_handle;
return KERN_SUCCESS;
}
make_mem_done:
if (user_handle != IP_NULL) {
- ipc_port_dealloc_kernel(user_handle);
- }
- if (user_entry != NULL) {
- kfree(user_entry, sizeof *user_entry);
+ /*
+ * Releasing "user_handle" causes the kernel object
+ * associated with it ("user_entry" here) to also be
+ * released and freed.
+ */
+ mach_memory_entry_port_release(user_handle);
}
return kr;
}
-kern_return_t
-_mach_make_memory_entry(
- vm_map_t target_map,
- memory_object_size_t *size,
- memory_object_offset_t offset,
- vm_prot_t permission,
- ipc_port_t *object_handle,
- ipc_port_t parent_entry)
-{
- memory_object_offset_t mo_size;
- kern_return_t kr;
-
- mo_size = (memory_object_offset_t)*size;
- kr = mach_make_memory_entry_64(target_map, &mo_size,
- (memory_object_offset_t)offset, permission, object_handle,
- parent_entry);
- *size = mo_size;
+kern_return_t
+_mach_make_memory_entry(
+ vm_map_t target_map,
+ memory_object_size_t *size,
+ memory_object_offset_t offset,
+ vm_prot_t permission,
+ ipc_port_t *object_handle,
+ ipc_port_t parent_entry)
+{
+ memory_object_size_t mo_size;
+ kern_return_t kr;
+
+ mo_size = (memory_object_size_t)*size;
+ kr = mach_make_memory_entry_64(target_map, &mo_size,
+ (memory_object_offset_t)offset, permission, object_handle,
+ parent_entry);
+ *size = mo_size;
+ return kr;
+}
+
+kern_return_t
+mach_make_memory_entry(
+ vm_map_t target_map,
+ vm_size_t *size,
+ vm_offset_t offset,
+ vm_prot_t permission,
+ ipc_port_t *object_handle,
+ ipc_port_t parent_entry)
+{
+ memory_object_size_t mo_size;
+ kern_return_t kr;
+
+ mo_size = (memory_object_size_t)*size;
+ kr = mach_make_memory_entry_64(target_map, &mo_size,
+ (memory_object_offset_t)offset, permission, object_handle,
+ parent_entry);
+ *size = CAST_DOWN(vm_size_t, mo_size);
+ return kr;
+}
+
+/*
+ * task_wire
+ *
+ * Set or clear the map's wiring_required flag. This flag, if set,
+ * will cause all future virtual memory allocation to allocate
+ * user wired memory. Unwiring pages wired down as a result of
+ * this routine is done with the vm_wire interface.
+ */
+kern_return_t
+task_wire(
+ vm_map_t map,
+ boolean_t must_wire)
+{
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vm_map_lock(map);
+ map->wiring_required = (must_wire == TRUE);
+ vm_map_unlock(map);
+
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+vm_map_exec_lockdown(
+ vm_map_t map)
+{
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vm_map_lock(map);
+ map->map_disallow_new_exec = TRUE;
+ vm_map_unlock(map);
+
+ return KERN_SUCCESS;
+}
+
+#if VM_NAMED_ENTRY_LIST
+queue_head_t vm_named_entry_list;
+int vm_named_entry_count = 0;
+lck_mtx_t vm_named_entry_list_lock_data;
+lck_mtx_ext_t vm_named_entry_list_lock_data_ext;
+#endif /* VM_NAMED_ENTRY_LIST */
+
+void vm_named_entry_init(void);
+void
+vm_named_entry_init(void)
+{
+#if VM_NAMED_ENTRY_LIST
+ queue_init(&vm_named_entry_list);
+ vm_named_entry_count = 0;
+ lck_mtx_init_ext(&vm_named_entry_list_lock_data,
+ &vm_named_entry_list_lock_data_ext,
+ &vm_object_lck_grp,
+ &vm_object_lck_attr);
+#endif /* VM_NAMED_ENTRY_LIST */
+}
+
+__private_extern__ kern_return_t
+mach_memory_entry_allocate(
+ vm_named_entry_t *user_entry_p,
+ ipc_port_t *user_handle_p)
+{
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
+
+ user_entry = (vm_named_entry_t) kalloc(sizeof *user_entry);
+ if (user_entry == NULL) {
+ return KERN_FAILURE;
+ }
+ bzero(user_entry, sizeof(*user_entry));
+
+ named_entry_lock_init(user_entry);
+
+ user_entry->backing.object = NULL;
+ user_entry->is_sub_map = FALSE;
+ user_entry->is_copy = FALSE;
+ user_entry->internal = FALSE;
+ user_entry->size = 0;
+ user_entry->offset = 0;
+ user_entry->data_offset = 0;
+ user_entry->protection = VM_PROT_NONE;
+ user_entry->ref_count = 1;
+
+ user_handle = ipc_kobject_alloc_port((ipc_kobject_t)user_entry,
+ IKOT_NAMED_ENTRY,
+ IPC_KOBJECT_ALLOC_MAKE_SEND | IPC_KOBJECT_ALLOC_NSREQUEST);
+
+ *user_entry_p = user_entry;
+ *user_handle_p = user_handle;
+
+#if VM_NAMED_ENTRY_LIST
+ /* keep a loose (no reference) pointer to the Mach port, for debugging only */
+ user_entry->named_entry_port = user_handle;
+ /* backtrace at allocation time, for debugging only */
+ OSBacktrace(&user_entry->named_entry_bt[0],
+ NAMED_ENTRY_BT_DEPTH);
+
+ /* add this new named entry to the global list */
+ lck_mtx_lock_spin(&vm_named_entry_list_lock_data);
+ queue_enter(&vm_named_entry_list, user_entry,
+ vm_named_entry_t, named_entry_list);
+ vm_named_entry_count++;
+ lck_mtx_unlock(&vm_named_entry_list_lock_data);
+#endif /* VM_NAMED_ENTRY_LIST */
+
+ return KERN_SUCCESS;
+}
+
+/*
+ * mach_memory_object_memory_entry_64
+ *
+ * Create a named entry backed by the provided pager.
+ *
+ */
+kern_return_t
+mach_memory_object_memory_entry_64(
+ host_t host,
+ boolean_t internal,
+ vm_object_offset_t size,
+ vm_prot_t permission,
+ memory_object_t pager,
+ ipc_port_t *entry_handle)
+{
+ unsigned int access;
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
+ vm_object_t object;
+
+ if (host == HOST_NULL) {
+ return KERN_INVALID_HOST;
+ }
+
+ if (pager == MEMORY_OBJECT_NULL && internal) {
+ object = vm_object_allocate(size);
+ if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) {
+ object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
+ }
+ } else {
+ object = memory_object_to_vm_object(pager);
+ if (object != VM_OBJECT_NULL) {
+ vm_object_reference(object);
+ }
+ }
+ if (object == VM_OBJECT_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (mach_memory_entry_allocate(&user_entry, &user_handle)
+ != KERN_SUCCESS) {
+ vm_object_deallocate(object);
+ return KERN_FAILURE;
+ }
+
+ user_entry->size = size;
+ user_entry->offset = 0;
+ user_entry->protection = permission & VM_PROT_ALL;
+ access = GET_MAP_MEM(permission);
+ SET_MAP_MEM(access, user_entry->protection);
+ user_entry->is_sub_map = FALSE;
+ assert(user_entry->ref_count == 1);
+
+ user_entry->backing.object = object;
+ user_entry->internal = object->internal;
+ assert(object->internal == internal);
+
+ *entry_handle = user_handle;
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+mach_memory_object_memory_entry(
+ host_t host,
+ boolean_t internal,
+ vm_size_t size,
+ vm_prot_t permission,
+ memory_object_t pager,
+ ipc_port_t *entry_handle)
+{
+ return mach_memory_object_memory_entry_64( host, internal,
+ (vm_object_offset_t)size, permission, pager, entry_handle);
+}
+
+
+kern_return_t
+mach_memory_entry_purgable_control(
+ ipc_port_t entry_port,
+ vm_purgable_t control,
+ int *state)
+{
+ if (control == VM_PURGABLE_SET_STATE_FROM_KERNEL) {
+ /* not allowed from user-space */
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ return memory_entry_purgeable_control_internal(entry_port, control, state);
+}
+
+kern_return_t
+memory_entry_purgeable_control_internal(
+ ipc_port_t entry_port,
+ vm_purgable_t control,
+ int *state)
+{
+ kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+
+ if (!IP_VALID(entry_port) ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
+ if (control != VM_PURGABLE_SET_STATE &&
+ control != VM_PURGABLE_GET_STATE &&
+ control != VM_PURGABLE_SET_STATE_FROM_KERNEL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if ((control == VM_PURGABLE_SET_STATE ||
+ control == VM_PURGABLE_SET_STATE_FROM_KERNEL) &&
+ (((*state & ~(VM_PURGABLE_ALL_MASKS)) != 0) ||
+ ((*state & VM_PURGABLE_STATE_MASK) > VM_PURGABLE_STATE_MASK))) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
+
+ named_entry_lock(mem_entry);
+
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vm_object_lock(object);
+
+ /* check that named entry covers entire object ? */
+ if (mem_entry->offset != 0 || object->vo_size != mem_entry->size) {
+ vm_object_unlock(object);
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ named_entry_unlock(mem_entry);
+
+ kr = vm_object_purgable_control(object, control, state);
+
+ vm_object_unlock(object);
+
return kr;
}
kern_return_t
-mach_make_memory_entry(
- vm_map_t target_map,
- vm_size_t *size,
- vm_offset_t offset,
- vm_prot_t permission,
- ipc_port_t *object_handle,
- ipc_port_t parent_entry)
-{
- memory_object_offset_t mo_size;
- kern_return_t kr;
-
- mo_size = (memory_object_offset_t)*size;
- kr = mach_make_memory_entry_64(target_map, &mo_size,
- (memory_object_offset_t)offset, permission, object_handle,
- parent_entry);
- *size = CAST_DOWN(vm_size_t, mo_size);
- return kr;
+mach_memory_entry_access_tracking(
+ ipc_port_t entry_port,
+ int *access_tracking,
+ uint32_t *access_tracking_reads,
+ uint32_t *access_tracking_writes)
+{
+ return memory_entry_access_tracking_internal(entry_port,
+ access_tracking,
+ access_tracking_reads,
+ access_tracking_writes);
}
-/*
- * task_wire
- *
- * Set or clear the map's wiring_required flag. This flag, if set,
- * will cause all future virtual memory allocation to allocate
- * user wired memory. Unwiring pages wired down as a result of
- * this routine is done with the vm_wire interface.
- */
kern_return_t
-task_wire(
- vm_map_t map,
- boolean_t must_wire)
+memory_entry_access_tracking_internal(
+ ipc_port_t entry_port,
+ int *access_tracking,
+ uint32_t *access_tracking_reads,
+ uint32_t *access_tracking_writes)
{
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ kern_return_t kr;
- if (must_wire)
- map->wiring_required = TRUE;
- else
- map->wiring_required = FALSE;
-
- return(KERN_SUCCESS);
-}
+ if (!IP_VALID(entry_port) ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
-__private_extern__ kern_return_t
-mach_memory_entry_allocate(
- vm_named_entry_t *user_entry_p,
- ipc_port_t *user_handle_p)
-{
- vm_named_entry_t user_entry;
- ipc_port_t user_handle;
- ipc_port_t previous;
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
- user_entry = (vm_named_entry_t) kalloc(sizeof *user_entry);
- if (user_entry == NULL)
- return KERN_FAILURE;
+ named_entry_lock(mem_entry);
- named_entry_lock_init(user_entry);
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
- user_handle = ipc_port_alloc_kernel();
- if (user_handle == IP_NULL) {
- kfree(user_entry, sizeof *user_entry);
- return KERN_FAILURE;
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
- ip_lock(user_handle);
- /* make a sonce right */
- user_handle->ip_sorights++;
- ip_reference(user_handle);
+#if VM_OBJECT_ACCESS_TRACKING
+ vm_object_access_tracking(object,
+ access_tracking,
+ access_tracking_reads,
+ access_tracking_writes);
+ kr = KERN_SUCCESS;
+#else /* VM_OBJECT_ACCESS_TRACKING */
+ (void) access_tracking;
+ (void) access_tracking_reads;
+ (void) access_tracking_writes;
+ kr = KERN_NOT_SUPPORTED;
+#endif /* VM_OBJECT_ACCESS_TRACKING */
- user_handle->ip_destination = IP_NULL;
- user_handle->ip_receiver_name = MACH_PORT_NULL;
- user_handle->ip_receiver = ipc_space_kernel;
+ named_entry_unlock(mem_entry);
- /* make a send right */
- user_handle->ip_mscount++;
- user_handle->ip_srights++;
- ip_reference(user_handle);
+ return kr;
+}
- ipc_port_nsrequest(user_handle, 1, user_handle, &previous);
- /* nsrequest unlocks user_handle */
+kern_return_t
+mach_memory_entry_ownership(
+ ipc_port_t entry_port,
+ task_t owner,
+ int ledger_tag,
+ int ledger_flags)
+{
+ task_t cur_task;
+ kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+
+ cur_task = current_task();
+ if (cur_task != kernel_task &&
+ (owner != cur_task ||
+ (ledger_flags & VM_LEDGER_FLAG_NO_FOOTPRINT) ||
+ ledger_tag == VM_LEDGER_TAG_NETWORK)) {
+ /*
+ * An entitlement is required to:
+ * + tranfer memory ownership to someone else,
+ * + request that the memory not count against the footprint,
+ * + tag as "network" (since that implies "no footprint")
+ */
+ if (!cur_task->task_can_transfer_memory_ownership &&
+ IOTaskHasEntitlement(cur_task,
+ "com.apple.private.memory.ownership_transfer")) {
+ cur_task->task_can_transfer_memory_ownership = TRUE;
+ }
+ if (!cur_task->task_can_transfer_memory_ownership) {
+ return KERN_NO_ACCESS;
+ }
+ }
- user_entry->backing.pager = NULL;
- user_entry->is_sub_map = FALSE;
- user_entry->is_pager = FALSE;
- user_entry->size = 0;
- user_entry->internal = FALSE;
- user_entry->ref_count = 1;
+ if (ledger_flags & ~VM_LEDGER_FLAGS) {
+ return KERN_INVALID_ARGUMENT;
+ }
+ if (ledger_tag <= 0 ||
+ ledger_tag > VM_LEDGER_TAG_MAX) {
+ return KERN_INVALID_ARGUMENT;
+ }
- ipc_kobject_set(user_handle, (ipc_kobject_t) user_entry,
- IKOT_NAMED_ENTRY);
+ if (!IP_VALID(entry_port) ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
- *user_entry_p = user_entry;
- *user_handle_p = user_handle;
+ named_entry_lock(mem_entry);
- return KERN_SUCCESS;
-}
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
-/*
- * mach_memory_object_memory_entry_64
- *
- * Create a named entry backed by the provided pager.
- *
- * JMM - we need to hold a reference on the pager -
- * and release it when the named entry is destroyed.
- */
-kern_return_t
-mach_memory_object_memory_entry_64(
- host_t host,
- boolean_t internal,
- vm_object_offset_t size,
- vm_prot_t permission,
- memory_object_t pager,
- ipc_port_t *entry_handle)
-{
- unsigned int access;
- vm_named_entry_t user_entry;
- ipc_port_t user_handle;
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
- if (host == HOST_NULL)
- return(KERN_INVALID_HOST);
+ vm_object_lock(object);
- if (mach_memory_entry_allocate(&user_entry, &user_handle)
- != KERN_SUCCESS) {
- return KERN_FAILURE;
+ /* check that named entry covers entire object ? */
+ if (mem_entry->offset != 0 || object->vo_size != mem_entry->size) {
+ vm_object_unlock(object);
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
- user_entry->backing.pager = pager;
- user_entry->size = size;
- user_entry->offset = 0;
- user_entry->protection = permission & VM_PROT_ALL;
- access = GET_MAP_MEM(permission);
- SET_MAP_MEM(access, user_entry->protection);
- user_entry->internal = internal;
- user_entry->is_sub_map = FALSE;
- user_entry->is_pager = TRUE;
- assert(user_entry->ref_count == 1);
+ named_entry_unlock(mem_entry);
- *entry_handle = user_handle;
- return KERN_SUCCESS;
-}
+ kr = vm_object_ownership_change(object,
+ ledger_tag,
+ owner,
+ ledger_flags,
+ FALSE); /* task_objq_locked */
+ vm_object_unlock(object);
-kern_return_t
-mach_memory_object_memory_entry(
- host_t host,
- boolean_t internal,
- vm_size_t size,
- vm_prot_t permission,
- memory_object_t pager,
- ipc_port_t *entry_handle)
-{
- return mach_memory_object_memory_entry_64( host, internal,
- (vm_object_offset_t)size, permission, pager, entry_handle);
+ return kr;
}
-
kern_return_t
-mach_memory_entry_purgable_control(
- ipc_port_t entry_port,
- vm_purgable_t control,
- int *state)
+mach_memory_entry_get_page_counts(
+ ipc_port_t entry_port,
+ unsigned int *resident_page_count,
+ unsigned int *dirty_page_count)
{
- kern_return_t kr;
- vm_named_entry_t mem_entry;
- vm_object_t object;
+ kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ vm_object_offset_t offset;
+ vm_object_size_t size;
- if (entry_port == IP_NULL ||
+ if (!IP_VALID(entry_port) ||
ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
return KERN_INVALID_ARGUMENT;
}
- mem_entry = (vm_named_entry_t) entry_port->ip_kobject;
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
named_entry_lock(mem_entry);
- if (mem_entry->is_sub_map || mem_entry->is_pager) {
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
named_entry_unlock(mem_entry);
return KERN_INVALID_ARGUMENT;
}
vm_object_lock(object);
- /* check that named entry covers entire object ? */
- if (mem_entry->offset != 0 || object->size != mem_entry->size) {
- vm_object_unlock(object);
- named_entry_unlock(mem_entry);
- return KERN_INVALID_ARGUMENT;
- }
+ offset = mem_entry->offset;
+ size = mem_entry->size;
named_entry_unlock(mem_entry);
- kr = vm_object_purgable_control(object, control, state);
+ kr = vm_object_get_page_counts(object, offset, size, resident_page_count, dirty_page_count);
vm_object_unlock(object);
*/
void
mach_memory_entry_port_release(
- ipc_port_t port)
+ ipc_port_t port)
{
assert(ip_kotype(port) == IKOT_NAMED_ENTRY);
ipc_port_release_send(port);
*/
void
mach_destroy_memory_entry(
- ipc_port_t port)
+ ipc_port_t port)
{
- vm_named_entry_t named_entry;
+ vm_named_entry_t named_entry;
#if MACH_ASSERT
assert(ip_kotype(port) == IKOT_NAMED_ENTRY);
#endif /* MACH_ASSERT */
- named_entry = (vm_named_entry_t)port->ip_kobject;
- mutex_lock(&(named_entry)->Lock);
+ named_entry = (vm_named_entry_t) ip_get_kobject(port);
+
+ named_entry_lock(named_entry);
named_entry->ref_count -= 1;
- if(named_entry->ref_count == 0) {
+
+ if (named_entry->ref_count == 0) {
if (named_entry->is_sub_map) {
vm_map_deallocate(named_entry->backing.map);
- } else if (!named_entry->is_pager) {
- /* release the memory object we've been pointing to */
+ } else if (named_entry->is_copy) {
+ vm_map_copy_discard(named_entry->backing.copy);
+ } else {
+ /* release the VM object we've been pointing to */
vm_object_deallocate(named_entry->backing.object);
- } /* else JMM - need to drop reference on pager in that case */
-
- mutex_unlock(&(named_entry)->Lock);
+ }
- kfree((void *) port->ip_kobject,
- sizeof (struct vm_named_entry));
- } else
- mutex_unlock(&(named_entry)->Lock);
+ named_entry_unlock(named_entry);
+ named_entry_lock_destroy(named_entry);
+
+#if VM_NAMED_ENTRY_LIST
+ lck_mtx_lock_spin(&vm_named_entry_list_lock_data);
+ queue_remove(&vm_named_entry_list, named_entry,
+ vm_named_entry_t, named_entry_list);
+ assert(vm_named_entry_count > 0);
+ vm_named_entry_count--;
+ lck_mtx_unlock(&vm_named_entry_list_lock_data);
+#endif /* VM_NAMED_ENTRY_LIST */
+
+ kfree(named_entry, sizeof(struct vm_named_entry));
+ } else {
+ named_entry_unlock(named_entry);
+ }
}
-
+/* Allow manipulation of individual page state. This is actually part of */
+/* the UPL regimen but takes place on the memory entry rather than on a UPL */
kern_return_t
-set_dp_control_port(
- host_priv_t host_priv,
- ipc_port_t control_port)
+mach_memory_entry_page_op(
+ ipc_port_t entry_port,
+ vm_object_offset_t offset,
+ int ops,
+ ppnum_t *phys_entry,
+ int *flags)
{
- if (host_priv == HOST_PRIV_NULL)
- return (KERN_INVALID_HOST);
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ kern_return_t kr;
+
+ if (!IP_VALID(entry_port) ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (IP_VALID(dynamic_pager_control_port))
- ipc_port_release_send(dynamic_pager_control_port);
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
- dynamic_pager_control_port = control_port;
- return KERN_SUCCESS;
+ named_entry_lock(mem_entry);
+
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vm_object_reference(object);
+ named_entry_unlock(mem_entry);
+
+ kr = vm_object_page_op(object, offset, ops, phys_entry, flags);
+
+ vm_object_deallocate(object);
+
+ return kr;
}
+/*
+ * mach_memory_entry_range_op offers performance enhancement over
+ * mach_memory_entry_page_op for page_op functions which do not require page
+ * level state to be returned from the call. Page_op was created to provide
+ * a low-cost alternative to page manipulation via UPLs when only a single
+ * page was involved. The range_op call establishes the ability in the _op
+ * family of functions to work on multiple pages where the lack of page level
+ * state handling allows the caller to avoid the overhead of the upl structures.
+ */
+
kern_return_t
-get_dp_control_port(
- host_priv_t host_priv,
- ipc_port_t *control_port)
+mach_memory_entry_range_op(
+ ipc_port_t entry_port,
+ vm_object_offset_t offset_beg,
+ vm_object_offset_t offset_end,
+ int ops,
+ int *range)
{
- if (host_priv == HOST_PRIV_NULL)
- return (KERN_INVALID_HOST);
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ kern_return_t kr;
- *control_port = ipc_port_copy_send(dynamic_pager_control_port);
- return KERN_SUCCESS;
-
+ if (!IP_VALID(entry_port) ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ mem_entry = (vm_named_entry_t) ip_get_kobject(entry_port);
+
+ named_entry_lock(mem_entry);
+
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ vm_object_reference(object);
+ named_entry_unlock(mem_entry);
+
+ kr = vm_object_range_op(object,
+ offset_beg,
+ offset_end,
+ ops,
+ (uint32_t *) range);
+
+ vm_object_deallocate(object);
+
+ return kr;
}
/* ******* Temporary Internal calls to UPL for BSD ***** */
extern int kernel_upl_commit(
upl_t upl,
upl_page_info_t *pl,
- mach_msg_type_number_t count);
+ mach_msg_type_number_t count);
extern int kernel_upl_commit_range(
upl_t upl,
upl_offset_t offset,
- upl_size_t size,
- int flags,
- upl_page_info_array_t pl,
- mach_msg_type_number_t count);
+ upl_size_t size,
+ int flags,
+ upl_page_info_array_t pl,
+ mach_msg_type_number_t count);
extern int kernel_upl_abort(
upl_t upl,
kern_return_t
kernel_upl_map(
- vm_map_t map,
- upl_t upl,
- vm_offset_t *dst_addr)
+ vm_map_t map,
+ upl_t upl,
+ vm_offset_t *dst_addr)
{
return vm_upl_map(map, upl, dst_addr);
}
kern_return_t
kernel_upl_unmap(
- vm_map_t map,
- upl_t upl)
+ vm_map_t map,
+ upl_t upl)
{
return vm_upl_unmap(map, upl);
}
upl_page_info_t *pl,
mach_msg_type_number_t count)
{
- kern_return_t kr;
+ kern_return_t kr;
kr = upl_commit(upl, pl, count);
upl_deallocate(upl);
kern_return_t
kernel_upl_commit_range(
- upl_t upl,
- upl_offset_t offset,
- upl_size_t size,
- int flags,
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int flags,
upl_page_info_array_t pl,
mach_msg_type_number_t count)
{
- boolean_t finished = FALSE;
- kern_return_t kr;
+ boolean_t finished = FALSE;
+ kern_return_t kr;
- if (flags & UPL_COMMIT_FREE_ON_EMPTY)
+ if (flags & UPL_COMMIT_FREE_ON_EMPTY) {
flags |= UPL_COMMIT_NOTIFY_EMPTY;
+ }
+
+ if (flags & UPL_COMMIT_KERNEL_ONLY_FLAGS) {
+ return KERN_INVALID_ARGUMENT;
+ }
kr = upl_commit_range(upl, offset, size, flags, pl, count, &finished);
- if ((flags & UPL_COMMIT_NOTIFY_EMPTY) && finished)
+ if ((flags & UPL_COMMIT_NOTIFY_EMPTY) && finished) {
upl_deallocate(upl);
+ }
return kr;
}
-
+
kern_return_t
kernel_upl_abort_range(
- upl_t upl,
- upl_offset_t offset,
- upl_size_t size,
- int abort_flags)
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int abort_flags)
{
- kern_return_t kr;
- boolean_t finished = FALSE;
+ kern_return_t kr;
+ boolean_t finished = FALSE;
- if (abort_flags & UPL_COMMIT_FREE_ON_EMPTY)
+ if (abort_flags & UPL_COMMIT_FREE_ON_EMPTY) {
abort_flags |= UPL_COMMIT_NOTIFY_EMPTY;
+ }
kr = upl_abort_range(upl, offset, size, abort_flags, &finished);
- if ((abort_flags & UPL_COMMIT_FREE_ON_EMPTY) && finished)
+ if ((abort_flags & UPL_COMMIT_FREE_ON_EMPTY) && finished) {
upl_deallocate(upl);
+ }
return kr;
}
kern_return_t
kernel_upl_abort(
- upl_t upl,
- int abort_type)
+ upl_t upl,
+ int abort_type)
{
- kern_return_t kr;
+ kern_return_t kr;
kr = upl_abort(upl, abort_type);
upl_deallocate(upl);
kern_return_t
vm_region_object_create(
- __unused vm_map_t target_map,
- vm_size_t size,
- ipc_port_t *object_handle)
+ __unused vm_map_t target_map,
+ vm_size_t size,
+ ipc_port_t *object_handle)
{
- vm_named_entry_t user_entry;
- ipc_port_t user_handle;
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
+
+ vm_map_t new_map;
- vm_map_t new_map;
-
if (mach_memory_entry_allocate(&user_entry, &user_handle)
!= KERN_SUCCESS) {
return KERN_FAILURE;
/* Create a named object based on a submap of specified size */
new_map = vm_map_create(PMAP_NULL, VM_MAP_MIN_ADDRESS,
- vm_map_round_page(size), TRUE);
+ vm_map_round_page(size,
+ VM_MAP_PAGE_MASK(target_map)),
+ TRUE);
+ vm_map_set_page_shift(new_map, VM_MAP_PAGE_SHIFT(target_map));
user_entry->backing.map = new_map;
user_entry->internal = TRUE;
*object_handle = user_handle;
return KERN_SUCCESS;
-
}
-ppnum_t vm_map_get_phys_page( /* forward */
- vm_map_t map,
- vm_offset_t offset);
+ppnum_t vm_map_get_phys_page( /* forward */
+ vm_map_t map,
+ vm_offset_t offset);
ppnum_t
vm_map_get_phys_page(
- vm_map_t map,
- vm_offset_t addr)
+ vm_map_t map,
+ vm_offset_t addr)
{
- vm_object_offset_t offset;
- vm_object_t object;
- vm_map_offset_t map_offset;
- vm_map_entry_t entry;
- ppnum_t phys_page = 0;
+ vm_object_offset_t offset;
+ vm_object_t object;
+ vm_map_offset_t map_offset;
+ vm_map_entry_t entry;
+ ppnum_t phys_page = 0;
- map_offset = vm_map_trunc_page(addr);
+ map_offset = vm_map_trunc_page(addr, PAGE_MASK);
vm_map_lock(map);
while (vm_map_lookup_entry(map, map_offset, &entry)) {
-
- if (entry->object.vm_object == VM_OBJECT_NULL) {
+ if (VME_OBJECT(entry) == VM_OBJECT_NULL) {
vm_map_unlock(map);
return (ppnum_t) 0;
}
if (entry->is_sub_map) {
- vm_map_t old_map;
- vm_map_lock(entry->object.sub_map);
+ vm_map_t old_map;
+ vm_map_lock(VME_SUBMAP(entry));
old_map = map;
- map = entry->object.sub_map;
- map_offset = entry->offset + (map_offset - entry->vme_start);
+ map = VME_SUBMAP(entry);
+ map_offset = (VME_OFFSET(entry) +
+ (map_offset - entry->vme_start));
vm_map_unlock(old_map);
continue;
}
- if (entry->object.vm_object->phys_contiguous) {
+ if (VME_OBJECT(entry)->phys_contiguous) {
/* These are not standard pageable memory mappings */
/* If they are not present in the object they will */
/* have to be picked up from the pager through the */
/* fault mechanism. */
- if(entry->object.vm_object->shadow_offset == 0) {
+ if (VME_OBJECT(entry)->vo_shadow_offset == 0) {
/* need to call vm_fault */
vm_map_unlock(map);
- vm_fault(map, map_offset, VM_PROT_NONE,
- FALSE, THREAD_UNINT, NULL, 0);
+ vm_fault(map, map_offset, VM_PROT_NONE,
+ FALSE /* change_wiring */, VM_KERN_MEMORY_NONE,
+ THREAD_UNINT, NULL, 0);
vm_map_lock(map);
continue;
}
- offset = entry->offset + (map_offset - entry->vme_start);
+ offset = (VME_OFFSET(entry) +
+ (map_offset - entry->vme_start));
phys_page = (ppnum_t)
- ((entry->object.vm_object->shadow_offset
- + offset) >> 12);
+ ((VME_OBJECT(entry)->vo_shadow_offset
+ + offset) >> PAGE_SHIFT);
break;
-
}
- offset = entry->offset + (map_offset - entry->vme_start);
- object = entry->object.vm_object;
+ offset = (VME_OFFSET(entry) + (map_offset - entry->vme_start));
+ object = VME_OBJECT(entry);
vm_object_lock(object);
while (TRUE) {
- vm_page_t dst_page = vm_page_lookup(object,offset);
- if(dst_page == VM_PAGE_NULL) {
- if(object->shadow) {
+ vm_page_t dst_page = vm_page_lookup(object, offset);
+ if (dst_page == VM_PAGE_NULL) {
+ if (object->shadow) {
vm_object_t old_object;
vm_object_lock(object->shadow);
old_object = object;
- offset = offset + object->shadow_offset;
+ offset = offset + object->vo_shadow_offset;
object = object->shadow;
vm_object_unlock(old_object);
} else {
break;
}
} else {
- phys_page = (ppnum_t)(dst_page->phys_page);
+ phys_page = (ppnum_t)(VM_PAGE_GET_PHYS_PAGE(dst_page));
vm_object_unlock(object);
break;
}
}
break;
-
- }
+ }
vm_map_unlock(map);
return phys_page;
}
-
-
-kern_return_t kernel_object_iopl_request( /* forward */
- vm_named_entry_t named_entry,
- memory_object_offset_t offset,
- vm_size_t *upl_size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int *flags);
+#if 0
+kern_return_t kernel_object_iopl_request( /* forward */
+ vm_named_entry_t named_entry,
+ memory_object_offset_t offset,
+ upl_size_t *upl_size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ int *flags);
kern_return_t
kernel_object_iopl_request(
- vm_named_entry_t named_entry,
- memory_object_offset_t offset,
- vm_size_t *upl_size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int *flags)
+ vm_named_entry_t named_entry,
+ memory_object_offset_t offset,
+ upl_size_t *upl_size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ int *flags)
{
- vm_object_t object;
- kern_return_t ret;
+ vm_object_t object;
+ kern_return_t ret;
- int caller_flags;
+ int caller_flags;
caller_flags = *flags;
}
/* a few checks to make sure user is obeying rules */
- if(*upl_size == 0) {
- if(offset >= named_entry->size)
- return(KERN_INVALID_RIGHT);
- *upl_size = named_entry->size - offset;
+ if (*upl_size == 0) {
+ if (offset >= named_entry->size) {
+ return KERN_INVALID_RIGHT;
+ }
+ *upl_size = (upl_size_t) (named_entry->size - offset);
+ if (*upl_size != named_entry->size - offset) {
+ return KERN_INVALID_ARGUMENT;
+ }
}
- if(caller_flags & UPL_COPYOUT_FROM) {
- if((named_entry->protection & VM_PROT_READ)
- != VM_PROT_READ) {
- return(KERN_INVALID_RIGHT);
+ if (caller_flags & UPL_COPYOUT_FROM) {
+ if ((named_entry->protection & VM_PROT_READ)
+ != VM_PROT_READ) {
+ return KERN_INVALID_RIGHT;
}
} else {
- if((named_entry->protection &
- (VM_PROT_READ | VM_PROT_WRITE))
- != (VM_PROT_READ | VM_PROT_WRITE)) {
- return(KERN_INVALID_RIGHT);
+ if ((named_entry->protection &
+ (VM_PROT_READ | VM_PROT_WRITE))
+ != (VM_PROT_READ | VM_PROT_WRITE)) {
+ return KERN_INVALID_RIGHT;
}
}
- if(named_entry->size < (offset + *upl_size))
- return(KERN_INVALID_ARGUMENT);
+ if (named_entry->size < (offset + *upl_size)) {
+ return KERN_INVALID_ARGUMENT;
+ }
/* the callers parameter offset is defined to be the */
/* offset from beginning of named entry offset in object */
offset = offset + named_entry->offset;
- if(named_entry->is_sub_map)
- return (KERN_INVALID_ARGUMENT);
-
- named_entry_lock(named_entry);
-
- if (named_entry->is_pager) {
- object = vm_object_enter(named_entry->backing.pager,
- named_entry->offset + named_entry->size,
- named_entry->internal,
- FALSE,
- FALSE);
- if (object == VM_OBJECT_NULL) {
- named_entry_unlock(named_entry);
- return(KERN_INVALID_OBJECT);
- }
-
- /* JMM - drop reference on the pager here? */
-
- /* create an extra reference for the object */
- vm_object_lock(object);
- vm_object_reference_locked(object);
- named_entry->backing.object = object;
- named_entry->is_pager = FALSE;
- named_entry_unlock(named_entry);
+ if (named_entry->is_sub_map ||
+ named_entry->is_copy) {
+ return KERN_INVALID_ARGUMENT;
+ }
- /* wait for object (if any) to be ready */
- if (!named_entry->internal) {
- while (!object->pager_ready) {
- vm_object_wait(object,
- VM_OBJECT_EVENT_PAGER_READY,
- THREAD_UNINT);
- vm_object_lock(object);
- }
- }
- vm_object_unlock(object);
+ named_entry_lock(named_entry);
- } else {
- /* This is the case where we are going to operate */
- /* an an already known object. If the object is */
- /* not ready it is internal. An external */
- /* object cannot be mapped until it is ready */
- /* we can therefore avoid the ready check */
- /* in this case. */
- object = named_entry->backing.object;
- vm_object_reference(object);
- named_entry_unlock(named_entry);
- }
+ /* This is the case where we are going to operate */
+ /* on an already known object. If the object is */
+ /* not ready it is internal. An external */
+ /* object cannot be mapped until it is ready */
+ /* we can therefore avoid the ready check */
+ /* in this case. */
+ object = named_entry->backing.object;
+ vm_object_reference(object);
+ named_entry_unlock(named_entry);
if (!object->private) {
- if (*upl_size > (MAX_UPL_TRANSFER*PAGE_SIZE))
- *upl_size = (MAX_UPL_TRANSFER*PAGE_SIZE);
+ if (*upl_size > MAX_UPL_TRANSFER_BYTES) {
+ *upl_size = MAX_UPL_TRANSFER_BYTES;
+ }
if (object->phys_contiguous) {
*flags = UPL_PHYS_CONTIG;
} else {
}
ret = vm_object_iopl_request(object,
- offset,
- *upl_size,
- upl_ptr,
- user_page_list,
- page_list_count,
- caller_flags);
+ offset,
+ *upl_size,
+ upl_ptr,
+ user_page_list,
+ page_list_count,
+ (upl_control_flags_t)(unsigned int)caller_flags);
vm_object_deallocate(object);
return ret;
}
+#endif
+
+/*
+ * These symbols are looked up at runtime by vmware, VirtualBox,
+ * despite not being exported in the symbol sets.
+ */
+
+#if defined(__x86_64__)
+
+kern_return_t
+mach_vm_map(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t initial_size,
+ mach_vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance);
+
+kern_return_t
+mach_vm_remap(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t size,
+ mach_vm_offset_t mask,
+ int flags,
+ vm_map_t src_map,
+ mach_vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance);
+
+kern_return_t
+mach_vm_map(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t initial_size,
+ mach_vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_object_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ return mach_vm_map_external(target_map, address, initial_size, mask, flags, port,
+ offset, copy, cur_protection, max_protection, inheritance);
+}
+
+kern_return_t
+mach_vm_remap(
+ vm_map_t target_map,
+ mach_vm_offset_t *address,
+ mach_vm_size_t size,
+ mach_vm_offset_t mask,
+ int flags,
+ vm_map_t src_map,
+ mach_vm_offset_t memory_address,
+ boolean_t copy,
+ vm_prot_t *cur_protection,
+ vm_prot_t *max_protection,
+ vm_inherit_t inheritance)
+{
+ return mach_vm_remap_external(target_map, address, size, mask, flags, src_map, memory_address,
+ copy, cur_protection, max_protection, inheritance);
+}
+
+kern_return_t
+vm_map(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance);
+
+kern_return_t
+vm_map(
+ vm_map_t target_map,
+ vm_offset_t *address,
+ vm_size_t size,
+ vm_offset_t mask,
+ int flags,
+ ipc_port_t port,
+ vm_offset_t offset,
+ boolean_t copy,
+ vm_prot_t cur_protection,
+ vm_prot_t max_protection,
+ vm_inherit_t inheritance)
+{
+ vm_tag_t tag;
+
+ VM_GET_FLAGS_ALIAS(flags, tag);
+ return vm_map_kernel(target_map, address, size, mask,
+ flags, VM_MAP_KERNEL_FLAGS_NONE, tag,
+ port, offset, copy,
+ cur_protection, max_protection, inheritance);
+}
+
+#endif /* __x86_64__ */
projects / apple / xnu.git / blobdiff