/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*
* User-exported virtual memory functions.
*/
-#ifdef MACH_BSD
-/* remove after component interface available */
-extern int vnode_pager_workaround;
-#endif
+
+/*
+ * 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/mach_types.h> /* to get vm_address_t */
#include <mach/memory_object.h>
#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/vm_map_server.h>
#include <mach/mach_syscalls.h>
-#include <mach/shared_memory_server.h>
+
+#include <mach/host_priv_server.h>
+#include <mach/mach_vm_server.h>
+#include <mach/vm_map_server.h>
#include <kern/host.h>
+#include <kern/kalloc.h>
#include <kern/task.h>
#include <kern/misc_protos.h>
+#include <vm/vm_fault.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/memory_object.h>
#include <vm/vm_pageout.h>
-
-
+#include <vm/vm_protos.h>
+#include <vm/vm_purgeable_internal.h>
vm_size_t upl_offset_to_pagelist = 0;
ipc_port_t dynamic_pager_control_port=NULL;
/*
- * vm_allocate allocates "zero fill" memory in the specfied
+ * mach_vm_allocate allocates "zero fill" memory in the specfied
* map.
*/
kern_return_t
-vm_allocate(
- register vm_map_t map,
- register vm_offset_t *addr,
- register vm_size_t size,
+mach_vm_allocate(
+ vm_map_t map,
+ mach_vm_offset_t *addr,
+ mach_vm_size_t size,
int flags)
{
+ vm_map_offset_t map_addr;
+ vm_map_size_t map_size;
kern_return_t result;
- boolean_t anywhere = VM_FLAGS_ANYWHERE & flags;
+ 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);
return(KERN_SUCCESS);
}
- if (anywhere)
- *addr = vm_map_min(map);
- else
- *addr = trunc_page(*addr);
- size = round_page(size);
+ anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
+ if (anywhere) {
+ /*
+ * No specific address requested, so start candidate address
+ * search at the minimum address in the map. However, if that
+ * minimum is 0, bump it up by PAGE_SIZE. We want to limit
+ * allocations of PAGEZERO to explicit requests since its
+ * normal use is to catch dereferences of NULL and many
+ * applications also treat pointers with a value of 0 as
+ * special and suddenly having address 0 contain useable
+ * memory would tend to confuse those applications.
+ */
+ map_addr = vm_map_min(map);
+ 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);
+ }
+
+ 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);
+
+ *addr = map_addr;
+ return(result);
+}
+
+/*
+ * 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_map_offset_t map_addr;
+ 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 (size == 0) {
+ *addr = 0;
+ return(KERN_SUCCESS);
+ }
+
+ anywhere = ((VM_FLAGS_ANYWHERE & flags) != 0);
+ if (anywhere) {
+ /*
+ * No specific address requested, so start candidate address
+ * search at the minimum address in the map. However, if that
+ * minimum is 0, bump it up by PAGE_SIZE. We want to limit
+ * allocations of PAGEZERO to explicit requests since its
+ * normal use is to catch dereferences of NULL and many
+ * applications also treat pointers with a value of 0 as
+ * special and suddenly having address 0 contain useable
+ * memory would tend to confuse those applications.
+ */
+ map_addr = vm_map_min(map);
+ 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);
}
result = vm_map_enter(
map,
- addr,
- size,
- (vm_offset_t)0,
+ &map_addr,
+ map_size,
+ (vm_map_offset_t)0,
flags,
VM_OBJECT_NULL,
(vm_object_offset_t)0,
VM_PROT_ALL,
VM_INHERIT_DEFAULT);
+ *addr = CAST_DOWN(vm_offset_t, map_addr);
return(result);
}
/*
- * vm_deallocate deallocates the specified range of addresses in the
+ * mach_vm_deallocate -
+ * deallocates the specified range of addresses in the
* specified address map.
*/
kern_return_t
+mach_vm_deallocate(
+ 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 (size == (mach_vm_offset_t) 0)
+ return(KERN_SUCCESS);
+
+ 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_NO_FLAGS));
+}
+
+/*
+ * vm_deallocate -
+ * deallocates the specified range of addresses in the
+ * specified address map (limited to addresses the same
+ * size as the kernel).
+ */
+kern_return_t
vm_deallocate(
register vm_map_t map,
vm_offset_t start,
vm_size_t size)
{
- if (map == VM_MAP_NULL)
+ if ((map == VM_MAP_NULL) || (start + size < start))
return(KERN_INVALID_ARGUMENT);
if (size == (vm_offset_t) 0)
return(KERN_SUCCESS);
- return(vm_map_remove(map, trunc_page(start),
- 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_NO_FLAGS));
}
/*
- * vm_inherit sets the inheritance of the specified range in the
+ * mach_vm_inherit -
+ * Sets the inheritance of the specified range in the
* specified map.
*/
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)
+{
+ if ((map == VM_MAP_NULL) || (start + size < start) ||
+ (new_inheritance > VM_INHERIT_LAST_VALID))
+ return(KERN_INVALID_ARGUMENT);
+
+ if (size == 0)
+ return KERN_SUCCESS;
+
+ 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));
+}
+
+/*
+ * vm_inherit -
+ * Sets the inheritance of the specified range in the
+ * specified map (range limited to addresses
+ */
+kern_return_t
vm_inherit(
register vm_map_t map,
vm_offset_t start,
vm_size_t size,
vm_inherit_t new_inheritance)
{
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
-
- if (new_inheritance > VM_INHERIT_LAST_VALID)
+ if ((map == VM_MAP_NULL) || (start + size < start) ||
+ (new_inheritance > VM_INHERIT_LAST_VALID))
return(KERN_INVALID_ARGUMENT);
+ if (size == 0)
+ return KERN_SUCCESS;
+
return(vm_map_inherit(map,
- trunc_page(start),
- round_page(start+size),
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start+size,
+ VM_MAP_PAGE_MASK(map)),
new_inheritance));
}
/*
- * vm_protect sets the protection of the specified range in the
+ * mach_vm_protect -
+ * Sets the protection of the specified range in the
* specified map.
*/
+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)
+{
+ if ((map == VM_MAP_NULL) || (start + size < start) ||
+ (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY)))
+ return(KERN_INVALID_ARGUMENT);
+
+ if (size == 0)
+ return KERN_SUCCESS;
+
+ 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));
+}
+
+/*
+ * vm_protect -
+ * Sets the protection of the specified range in the
+ * specified map. Addressability of the range limited
+ * to the same size as the kernel.
+ */
+
kern_return_t
vm_protect(
- register vm_map_t map,
+ 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) ||
- (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY)))
+ if ((map == VM_MAP_NULL) || (start + size < start) ||
+ (new_protection & ~(VM_PROT_ALL | VM_PROT_COPY)))
return(KERN_INVALID_ARGUMENT);
+ if (size == 0)
+ return KERN_SUCCESS;
+
return(vm_map_protect(map,
- trunc_page(start),
- round_page(start+size),
+ 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));
}
/*
+ * mach_vm_machine_attributes -
* Handle machine-specific attributes for a mapping, such
* as cachability, migrability, etc.
*/
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 */
+{
+ if ((map == VM_MAP_NULL) || (addr + size < addr))
+ return(KERN_INVALID_ARGUMENT);
+
+ if (size == 0)
+ return KERN_SUCCESS;
+
+ 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);
+}
+
+/*
+ * vm_machine_attribute -
+ * Handle machine-specific attributes for a mapping, such
+ * as cachability, migrability, etc. Limited addressability
+ * (same range limits as for the native kernel map).
+ */
+kern_return_t
vm_machine_attribute(
vm_map_t map,
- vm_address_t address,
+ 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 (size == 0)
+ return KERN_SUCCESS;
+
+ 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);
+}
+
+/*
+ * mach_vm_read -
+ * Read/copy a range from one address space and return it to the caller.
+ *
+ * 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
+ * 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)
+{
+ kern_return_t error;
+ vm_map_copy_t ipc_address;
+
if (map == VM_MAP_NULL)
return(KERN_INVALID_ARGUMENT);
- return vm_map_machine_attribute(map, address, size, attribute, value);
+ 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);
+
+ if (KERN_SUCCESS == error) {
+ *data = (pointer_t) ipc_address;
+ *data_size = (mach_msg_type_number_t) size;
+ assert(*data_size == size);
+ }
+ 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
+ * that gets returned.
+ */
kern_return_t
vm_read(
vm_map_t map,
- vm_address_t address,
+ vm_address_t addr,
vm_size_t size,
pointer_t *data,
mach_msg_type_number_t *data_size)
if (map == VM_MAP_NULL)
return(KERN_INVALID_ARGUMENT);
- if ((error = vm_map_copyin(map,
- address,
- size,
- FALSE, /* src_destroy */
- &ipc_address)) == KERN_SUCCESS) {
+ if (size > (unsigned)(mach_msg_type_number_t) -1) {
+ /*
+ * 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);
+
+ 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);
}
+/*
+ * mach_vm_read_list -
+ * Read/copy a list of address ranges from specified map.
+ *
+ * MIG does not know how to deal with a returned array of
+ * vm_map_copy_t structures, so we have to do the copyout
+ * manually here.
+ */
kern_return_t
-vm_read_list(
- vm_map_t map,
- vm_read_entry_t data_list,
- mach_msg_type_number_t count)
+mach_vm_read_list(
+ 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 ipc_address;
+ vm_map_copy_t copy;
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL ||
+ count > VM_MAP_ENTRY_MAX)
return(KERN_INVALID_ARGUMENT);
+ error = KERN_SUCCESS;
for(i=0; i<count; i++) {
- error = vm_map_copyin(map,
- data_list[i].address,
- data_list[i].size,
- FALSE, /* src_destroy */
- &ipc_address);
- if(error != KERN_SUCCESS) {
- data_list[i].address = (vm_address_t)0;
- data_list[i].size = (vm_size_t)0;
- break;
- }
- if(data_list[i].size != 0) {
- error = vm_map_copyout(current_task()->map,
- &(data_list[i].address),
- (vm_map_copy_t) ipc_address);
- if(error != KERN_SUCCESS) {
- data_list[i].address = (vm_address_t)0;
- data_list[i].size = (vm_size_t)0;
- break;
+ 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) {
+ error = vm_map_copyin(map,
+ map_addr,
+ map_size,
+ FALSE, /* src_destroy */
+ ©);
+ if (KERN_SUCCESS == error) {
+ error = vm_map_copyout(
+ current_task()->map,
+ &map_addr,
+ copy);
+ if (KERN_SUCCESS == error) {
+ data_list[i].address = 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);
}
-/*
- * This routine reads from the specified map and overwrites part of the current
- * activation's map. 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).
+/*
+ * vm_read_list -
+ * Read/copy a list of address ranges from specified map.
+ *
+ * MIG does not know how to deal with a returned array of
+ * vm_map_copy_t structures, so we have to do the copyout
+ * manually here.
+ *
+ * The source and destination ranges are limited to those
+ * that can be described with a vm_address_t (i.e. same
+ * size map as the kernel).
+ *
+ * JMM - If the result of the copyout is an address range
+ * that cannot be described with a vm_address_t (i.e. the
+ * caller had a larger address space but used this call
+ * anyway), it will result in a truncated address being
+ * returned (and a likely confused caller).
*/
-#define VM_OVERWRITE_SMALL 512
-
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)
-{
- struct {
- long align;
- char buf[VM_OVERWRITE_SMALL];
- } inbuf;
- vm_map_t oldmap;
- kern_return_t error = KERN_SUCCESS;
+vm_read_list(
+ 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;
- if (map == VM_MAP_NULL)
+ if (map == VM_MAP_NULL ||
+ count > VM_MAP_ENTRY_MAX)
return(KERN_INVALID_ARGUMENT);
- if (size <= VM_OVERWRITE_SMALL) {
- if(vm_map_read_user(map, (vm_offset_t)address,
- (vm_offset_t)&inbuf, size)) {
- error = KERN_INVALID_ADDRESS;
- } else {
- if(vm_map_write_user(current_map(),
- (vm_offset_t)&inbuf, (vm_offset_t)data, size))
- error = KERN_INVALID_ADDRESS;
- }
- }
- else {
- if ((error = vm_map_copyin(map,
- address,
- size,
+ error = KERN_SUCCESS;
+ 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) {
+ error = vm_map_copyin(map,
+ map_addr,
+ map_size,
FALSE, /* src_destroy */
- ©)) == KERN_SUCCESS) {
- if ((error = vm_map_copy_overwrite(
- current_act()->map,
- data,
- copy,
- FALSE)) == KERN_SUCCESS) {
- }
- else {
+ ©);
+ if (KERN_SUCCESS == error) {
+ 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);
+ continue;
+ }
vm_map_copy_discard(copy);
}
}
+ data_list[i].address = (mach_vm_address_t)0;
+ data_list[i].size = (mach_vm_size_t)0;
}
- *data_size = size;
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).
+ */
-
-
-/*ARGSUSED*/
kern_return_t
-vm_write(
+mach_vm_read_overwrite(
vm_map_t map,
- vm_address_t address,
- vm_offset_t data,
- mach_msg_type_number_t size)
+ 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;
+
if (map == VM_MAP_NULL)
- return KERN_INVALID_ARGUMENT;
+ return(KERN_INVALID_ARGUMENT);
- return vm_map_copy_overwrite(map, address, (vm_map_copy_t) data,
- FALSE /* interruptible XXX */);
+ error = vm_map_copyin(map, (vm_map_address_t)address,
+ (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);
+ if (KERN_SUCCESS == error) {
+ *data_size = size;
+ return error;
+ }
+ vm_map_copy_discard(copy);
+ }
+ 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
+ * the ranges are in that first portion of the respective address
+ * spaces).
+ */
+
kern_return_t
-vm_copy(
+vm_read_overwrite(
vm_map_t map,
- vm_address_t source_address,
+ vm_address_t address,
vm_size_t size,
- vm_address_t dest_address)
+ vm_address_t data,
+ vm_size_t *data_size)
{
- vm_map_copy_t copy;
- kern_return_t kr;
+ kern_return_t error;
+ vm_map_copy_t copy;
if (map == VM_MAP_NULL)
- return KERN_INVALID_ARGUMENT;
+ return(KERN_INVALID_ARGUMENT);
- kr = vm_map_copyin(map, source_address, size,
- FALSE, ©);
- if (kr != KERN_SUCCESS)
- return kr;
+ error = vm_map_copyin(map, (vm_map_address_t)address,
+ (vm_map_size_t)size, FALSE, ©);
- kr = vm_map_copy_overwrite(map, dest_address, copy,
- FALSE /* interruptible XXX */);
- if (kr != KERN_SUCCESS) {
+ if (KERN_SUCCESS == error) {
+ error = vm_map_copy_overwrite(current_thread()->map,
+ (vm_map_address_t)data,
+ copy, FALSE);
+ if (KERN_SUCCESS == error) {
+ *data_size = size;
+ return error;
+ }
vm_map_copy_discard(copy);
- return kr;
}
-
- return KERN_SUCCESS;
+ return(error);
}
+
/*
- * Routine: vm_map
+ * mach_vm_write -
+ * Overwrite the specified address range with the data provided
+ * (from the current map).
*/
kern_return_t
-vm_map_64(
- vm_map_t target_map,
- vm_offset_t *address,
- vm_size_t initial_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)
+mach_vm_write(
+ vm_map_t map,
+ mach_vm_address_t address,
+ pointer_t data,
+ __unused mach_msg_type_number_t size)
{
- register
- vm_object_t object;
- vm_prot_t prot;
- vm_object_size_t size = (vm_object_size_t)initial_size;
- kern_return_t result;
+ if (map == VM_MAP_NULL)
+ return KERN_INVALID_ARGUMENT;
- /*
- * 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) ||
- size == 0)
- return(KERN_INVALID_ARGUMENT);
+ return vm_map_copy_overwrite(map, (vm_map_address_t)address,
+ (vm_map_copy_t) data, FALSE /* interruptible XXX */);
+}
- /*
- * 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);
+/*
+ * vm_write -
+ * Overwrite the specified address range with the data provided
+ * (from the current map).
+ *
+ * The addressability of the range of addresses to overwrite is
+ * limited bu the use of a vm_address_t (same size as kernel map).
+ * Either the target map is also small, or the range is in the
+ * low addresses within it.
+ */
+kern_return_t
+vm_write(
+ vm_map_t map,
+ vm_address_t address,
+ pointer_t data,
+ __unused mach_msg_type_number_t size)
+{
+ if (map == VM_MAP_NULL)
+ 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;
+ return vm_map_copy_overwrite(map, (vm_map_address_t)address,
+ (vm_map_copy_t) data, FALSE /* interruptible XXX */);
+}
- named_entry_unlock(named_entry);
- *address = trunc_page(*address);
- size = round_page(size);
- vm_object_reference(vm_submap_object);
- if ((result = vm_map_enter(target_map,
- address, size, 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, *address,
- (*address) + size,
- named_entry->backing.map,
- (vm_offset_t)offset, TRUE);
- } else {
- vm_map_submap(target_map, *address,
- (*address) + size,
- named_entry->backing.map,
- (vm_offset_t)offset, FALSE);
- }
- if(copy) {
- if(vm_map_lookup_entry(
- target_map, *address, &map_entry)) {
- map_entry->needs_copy = TRUE;
- }
- }
- }
- return(result);
-
- } else if(named_entry->object) {
- /* 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. */
- named_entry_unlock(named_entry);
- vm_object_reference(named_entry->object);
- object = named_entry->object;
- } else {
- 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);
- }
- named_entry->object = object;
- named_entry_unlock(named_entry);
- /* create an extra reference for the named entry */
- vm_object_reference(named_entry->object);
- /* wait for object (if any) to be ready */
- if (object != VM_OBJECT_NULL) {
- 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 {
- if ((object = vm_object_enter(port, size, FALSE, FALSE, FALSE))
- == VM_OBJECT_NULL)
- return(KERN_INVALID_OBJECT);
+/*
+ * mach_vm_copy -
+ * Overwrite one range of the specified map with the contents of
+ * another range within that same map (i.e. both address ranges
+ * are "over there").
+ */
+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_copy_t copy;
+ kern_return_t kr;
- /* wait for object (if any) to be ready */
- if (object != VM_OBJECT_NULL) {
- 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);
- }
+ 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, ©);
+
+ if (KERN_SUCCESS == kr) {
+ kr = vm_map_copy_overwrite(map,
+ (vm_map_address_t)dest_address,
+ copy, FALSE /* interruptible XXX */);
+
+ if (KERN_SUCCESS != kr)
+ vm_map_copy_discard(copy);
}
+ return kr;
+}
- *address = trunc_page(*address);
- size = round_page(size);
+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_copy_t copy;
+ kern_return_t kr;
- /*
- * Perform the copy if requested
- */
+ if (map == VM_MAP_NULL)
+ return KERN_INVALID_ARGUMENT;
- if (copy) {
- vm_object_t new_object;
- vm_object_offset_t new_offset;
+ kr = vm_map_copyin(map, (vm_map_address_t)source_address,
+ (vm_map_size_t)size, FALSE, ©);
- result = vm_object_copy_strategically(object, offset, size,
- &new_object, &new_offset,
- ©);
+ if (KERN_SUCCESS == kr) {
+ kr = vm_map_copy_overwrite(map,
+ (vm_map_address_t)dest_address,
+ copy, FALSE /* interruptible XXX */);
+ if (KERN_SUCCESS != kr)
+ vm_map_copy_discard(copy);
+ }
+ return kr;
+}
- if (result == KERN_MEMORY_RESTART_COPY) {
- boolean_t success;
- boolean_t src_needs_copy;
+/*
+ * mach_vm_map -
+ * Map some range of an object into an address space.
+ *
+ * The object can be one of several types of objects:
+ * NULL - anonymous memory
+ * a named entry - a range within another address space
+ * or a range within a memory object
+ * a whole memory object
+ *
+ */
+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 kr;
+ vm_map_offset_t vmmaddr;
- /*
- * 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.
- */
+ vmmaddr = (vm_map_offset_t) *address;
- vm_object_deallocate(object);
+ /* filter out any kernel-only flags */
+ if (flags & ~VM_FLAGS_USER_MAP)
+ return KERN_INVALID_ARGUMENT;
- if (result != KERN_SUCCESS)
- return (result);
+ kr = vm_map_enter_mem_object(target_map,
+ &vmmaddr,
+ initial_size,
+ mask,
+ flags,
+ port,
+ offset,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
+
+ *address = vmmaddr;
+ return kr;
+}
- object = new_object;
- offset = new_offset;
- }
- if ((result = vm_map_enter(target_map,
- address, size, mask, flags,
- object, offset,
- copy,
- cur_protection, max_protection, inheritance
- )) != KERN_SUCCESS)
- vm_object_deallocate(object);
- return(result);
+/* 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)
+{
+ mach_vm_address_t map_addr;
+ mach_vm_size_t map_size;
+ mach_vm_offset_t map_mask;
+ kern_return_t kr;
+
+ map_addr = (mach_vm_address_t)*address;
+ 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_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_prot_t max_protection,
vm_inherit_t inheritance)
{
- vm_map_64(target_map, address, size, mask, flags,
- port, (vm_object_offset_t)offset, copy,
- cur_protection, max_protection, inheritance);
+ mach_vm_address_t map_addr;
+ mach_vm_size_t map_size;
+ mach_vm_offset_t map_mask;
+ vm_object_offset_t obj_offset;
+ kern_return_t kr;
+
+ map_addr = (mach_vm_address_t)*address;
+ map_size = (mach_vm_size_t)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_offset_t, map_addr);
+ return kr;
+}
+
+/*
+ * mach_vm_remap -
+ * Remap a range of memory from one task into another,
+ * to another address range within the same task, or
+ * over top of itself (with altered permissions and/or
+ * as an in-place copy of itself).
+ */
+
+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)
+{
+ 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;
+
+ /* 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,
+ flags,
+ src_map,
+ memory_address,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
+ *address = map_addr;
+ return kr;
}
+/*
+ * vm_remap -
+ * Remap a range of memory from one task into another,
+ * to another address range within the same task, or
+ * over top of itself (with altered permissions and/or
+ * as an in-place copy of itself).
+ *
+ * The addressability of the source and target address
+ * range is limited by the size of vm_address_t (in the
+ * kernel context).
+ */
+kern_return_t
+vm_remap(
+ 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_map_offset_t map_addr;
+ kern_return_t kr;
+
+ 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,
+ flags,
+ src_map,
+ memory_address,
+ copy,
+ cur_protection,
+ max_protection,
+ inheritance);
+ *address = CAST_DOWN(vm_offset_t, map_addr);
+ return kr;
+}
/*
- * NOTE: this routine (and this file) will no longer require mach_host_server.h
- * when vm_wire is changed to use ledgers.
+ * NOTE: these routine (and this file) will no longer require mach_host_server.h
+ * when mach_vm_wire and vm_wire are changed to use ledgers.
*/
#include <mach/mach_host_server.h>
/*
+ * mach_vm_wire
+ * Specify that the range of the virtual address space
+ * of the target task must not cause page faults for
+ * the indicated accesses.
+ *
+ * [ 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)
+{
+ kern_return_t rc;
+
+ if (host_priv == HOST_PRIV_NULL)
+ return KERN_INVALID_HOST;
+
+ assert(host_priv == &realhost);
+
+ if (map == VM_MAP_NULL)
+ return KERN_INVALID_TASK;
+
+ 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_PAGE_MASK(map)),
+ vm_map_round_page(start+size,
+ VM_MAP_PAGE_MASK(map)),
+ access,
+ TRUE);
+ } else {
+ 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;
+}
+
+/*
+ * vm_wire -
* Specify that the range of the virtual address space
* of the target task must not cause page faults for
* the indicated accesses.
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, trunc_page(start),
- round_page(start+size), access, TRUE);
+ if (size == 0) {
+ rc = KERN_SUCCESS;
+ } else if (access != VM_PROT_NONE) {
+ rc = vm_map_wire(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start+size,
+ VM_MAP_PAGE_MASK(map)),
+ access,
+ TRUE);
} else {
- rc = vm_map_unwire(map, trunc_page(start),
- 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;
}
*
* Synchronises the memory range specified with its backing store
* image by either flushing or cleaning the contents to the appropriate
- * memory manager engaging in a memory object synchronize dialog with
- * the manager. The client doesn't return until the manager issues
- * m_o_s_completed message. MIG Magically converts user task parameter
- * to the task's address map.
+ * memory manager.
+ *
+ * interpretation of sync_flags
+ * VM_SYNC_INVALIDATE - discard pages, only return precious
+ * pages to manager.
+ *
+ * VM_SYNC_INVALIDATE & (VM_SYNC_SYNCHRONOUS | VM_SYNC_ASYNCHRONOUS)
+ * - discard pages, write dirty or precious
+ * pages back to memory manager.
+ *
+ * VM_SYNC_SYNCHRONOUS | VM_SYNC_ASYNCHRONOUS
+ * - write dirty or precious pages back to
+ * the memory manager.
+ *
+ * VM_SYNC_CONTIGUOUS - does everything normally, but if there
+ * is a hole in the region, and we would
+ * have returned KERN_SUCCESS, return
+ * KERN_INVALID_ADDRESS instead.
+ *
+ * RETURNS
+ * KERN_INVALID_TASK Bad task parameter
+ * KERN_INVALID_ARGUMENT both sync and async were specified.
+ * KERN_SUCCESS The usual.
+ * KERN_INVALID_ADDRESS There was a hole in the region.
+ */
+
+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)
+{
+
+ 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_msync
+ *
+ * Synchronises the memory range specified with its backing store
+ * image by either flushing or cleaning the contents to the appropriate
+ * memory manager.
*
* interpretation of sync_flags
* VM_SYNC_INVALIDATE - discard pages, only return precious
* - write dirty or precious pages back to
* the memory manager.
*
- * NOTE
- * The memory object attributes have not yet been implemented, this
- * function will have to deal with the invalidate attribute
+ * VM_SYNC_CONTIGUOUS - does everything normally, but if there
+ * is a hole in the region, and we would
+ * have returned KERN_SUCCESS, return
+ * KERN_INVALID_ADDRESS instead.
+ *
+ * The addressability of the range is limited to that which can
+ * be described by a vm_address_t.
*
* RETURNS
* KERN_INVALID_TASK Bad task parameter
* KERN_INVALID_ARGUMENT both sync and async were specified.
* KERN_SUCCESS The usual.
+ * KERN_INVALID_ADDRESS There was a hole in the region.
*/
kern_return_t
vm_size_t size,
vm_sync_t sync_flags)
{
- msync_req_t msr;
- msync_req_t new_msr;
- queue_chain_t req_q; /* queue of requests for this msync */
- vm_map_entry_t entry;
- vm_size_t amount_left;
- vm_object_offset_t offset;
- boolean_t do_sync_req;
- boolean_t modifiable;
-
-
- if ((sync_flags & VM_SYNC_ASYNCHRONOUS) &&
- (sync_flags & VM_SYNC_SYNCHRONOUS))
- return(KERN_INVALID_ARGUMENT);
- /*
- * align address and size on page boundaries
- */
- size = round_page(address + size) - trunc_page(address);
- address = trunc_page(address);
-
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_TASK);
-
- if (size == 0)
- return(KERN_SUCCESS);
+ if (map == VM_MAP_NULL)
+ return(KERN_INVALID_TASK);
- queue_init(&req_q);
- amount_left = size;
+ return vm_map_msync(map, (vm_map_address_t)address,
+ (vm_map_size_t)size, sync_flags);
+}
- while (amount_left > 0) {
- vm_size_t flush_size;
- vm_object_t object;
+int
+vm_toggle_entry_reuse(int toggle, int *old_value)
+{
+ vm_map_t map = current_map();
+
+ if(toggle == VM_TOGGLE_GETVALUE && old_value != NULL){
+ *old_value = map->disable_vmentry_reuse;
+ } else if(toggle == VM_TOGGLE_SET){
+ vm_map_lock(map);
+ map->disable_vmentry_reuse = TRUE;
+ if (map->first_free == vm_map_to_entry(map)) {
+ 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);
- if (!vm_map_lookup_entry(map, address, &entry)) {
- vm_size_t skip;
+ map->disable_vmentry_reuse = FALSE;
+ vm_map_unlock(map);
+ } else
+ return KERN_INVALID_ARGUMENT;
- /*
- * hole in the address map.
- */
+ return KERN_SUCCESS;
+}
- /*
- * Check for empty map.
- */
- if (entry == vm_map_to_entry(map) &&
- entry->vme_next == entry) {
- vm_map_unlock(map);
- break;
- }
- /*
- * Check that we don't wrap and that
- * we have at least one real map entry.
- */
- if ((map->hdr.nentries == 0) ||
- (entry->vme_next->vme_start < address)) {
- vm_map_unlock(map);
- break;
- }
- /*
- * Move up to the next entry if needed
- */
- skip = (entry->vme_next->vme_start - address);
- if (skip >= amount_left)
- amount_left = 0;
- else
- amount_left -= skip;
- address = entry->vme_next->vme_start;
- vm_map_unlock(map);
- continue;
- }
+/*
+ * 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
+mach_vm_behavior_set(
+ 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);
- offset = address - entry->vme_start;
+ if (size == 0)
+ return KERN_SUCCESS;
- /*
- * do we have more to flush than is contained in this
- * entry ?
- */
- if (amount_left + entry->vme_start + offset > entry->vme_end) {
- flush_size = entry->vme_end -
- (entry->vme_start + offset);
- } else {
- flush_size = amount_left;
- }
- amount_left -= flush_size;
- address += flush_size;
+ return(vm_map_behavior_set(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start+size,
+ VM_MAP_PAGE_MASK(map)),
+ new_behavior));
+}
- if (entry->is_sub_map == TRUE) {
- vm_map_t local_map;
- vm_offset_t local_offset;
+/*
+ * 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.
+ *
+ * This routine is potentially limited in addressibility by the
+ * use of vm_offset_t (if the map provided is larger than the
+ * kernel's).
+ */
+kern_return_t
+vm_behavior_set(
+ 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);
- local_map = entry->object.sub_map;
- local_offset = entry->offset;
- vm_map_unlock(map);
- vm_msync(
- local_map,
- local_offset,
- flush_size,
- sync_flags);
- continue;
- }
- object = entry->object.vm_object;
+ if (size == 0)
+ return KERN_SUCCESS;
- /*
- * We can't sync this object if the object has not been
- * created yet
- */
- if (object == VM_OBJECT_NULL) {
- vm_map_unlock(map);
- continue;
- }
- offset += entry->offset;
- modifiable = (entry->protection & VM_PROT_WRITE)
- != VM_PROT_NONE;
+ return(vm_map_behavior_set(map,
+ vm_map_trunc_page(start,
+ VM_MAP_PAGE_MASK(map)),
+ vm_map_round_page(start+size,
+ VM_MAP_PAGE_MASK(map)),
+ new_behavior));
+}
- vm_object_lock(object);
+/*
+ * mach_vm_region:
+ *
+ * User call to obtain information about a region in
+ * a task's address map. Currently, only one flavor is
+ * supported.
+ *
+ * XXX The reserved and behavior fields cannot be filled
+ * in until the vm merge from the IK is completed, and
+ * vm_reserve is implemented.
+ *
+ * XXX Dependency: syscall_vm_region() also supports only one flavor.
+ */
- if (sync_flags & (VM_SYNC_KILLPAGES | VM_SYNC_DEACTIVATE)) {
- boolean_t kill_pages = 0;
+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_offset_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (sync_flags & VM_SYNC_KILLPAGES) {
- if (object->ref_count == 1 && !entry->needs_copy && !object->shadow)
- kill_pages = 1;
- else
- kill_pages = -1;
- }
- if (kill_pages != -1)
- memory_object_deactivate_pages(object, offset,
- (vm_object_size_t)flush_size, kill_pages);
- vm_object_unlock(object);
- vm_map_unlock(map);
- continue;
- }
- /*
- * We can't sync this object if there isn't a pager.
- * Don't bother to sync internal objects, since there can't
- * be any "permanent" storage for these objects anyway.
- */
- if ((object->pager == IP_NULL) || (object->internal) ||
- (object->private)) {
- vm_object_unlock(object);
- vm_map_unlock(map);
- continue;
- }
- /*
- * keep reference on the object until syncing is done
- */
- assert(object->ref_count > 0);
- object->ref_count++;
- vm_object_res_reference(object);
- vm_object_unlock(object);
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- vm_map_unlock(map);
+ map_addr = (vm_map_offset_t)*address;
+ map_size = (vm_map_size_t)*size;
- do_sync_req = memory_object_sync(object,
- offset,
- flush_size,
- sync_flags & VM_SYNC_INVALIDATE,
- (modifiable &&
- (sync_flags & VM_SYNC_SYNCHRONOUS ||
- sync_flags & VM_SYNC_ASYNCHRONOUS)));
+ /* legacy conversion */
+ if (VM_REGION_BASIC_INFO == flavor)
+ flavor = VM_REGION_BASIC_INFO_64;
- /*
- * only send a m_o_s if we returned pages or if the entry
- * is writable (ie dirty pages may have already been sent back)
- */
- if (!do_sync_req && !modifiable) {
- vm_object_deallocate(object);
- continue;
- }
- msync_req_alloc(new_msr);
+ kr = vm_map_region(map,
+ &map_addr, &map_size,
+ flavor, info, count,
+ object_name);
- vm_object_lock(object);
- offset += object->paging_offset;
+ *address = map_addr;
+ *size = map_size;
+ return kr;
+}
- new_msr->offset = offset;
- new_msr->length = flush_size;
- new_msr->object = object;
- new_msr->flag = VM_MSYNC_SYNCHRONIZING;
-re_iterate:
- queue_iterate(&object->msr_q, msr, msync_req_t, msr_q) {
- /*
- * need to check for overlapping entry, if found, wait
- * on overlapping msr to be done, then reiterate
- */
- msr_lock(msr);
- if (msr->flag == VM_MSYNC_SYNCHRONIZING &&
- ((offset >= msr->offset &&
- offset < (msr->offset + msr->length)) ||
- (msr->offset >= offset &&
- msr->offset < (offset + flush_size))))
- {
- assert_wait((event_t) msr,THREAD_INTERRUPTIBLE);
- msr_unlock(msr);
- vm_object_unlock(object);
- thread_block((void (*)(void))0);
- vm_object_lock(object);
- goto re_iterate;
- }
- msr_unlock(msr);
- }/* queue_iterate */
+/*
+ * vm_region_64 and vm_region:
+ *
+ * User call to obtain information about a region in
+ * a task's address map. Currently, only one flavor is
+ * supported.
+ *
+ * XXX The reserved and behavior fields cannot be filled
+ * in until the vm merge from the IK is completed, and
+ * vm_reserve is implemented.
+ *
+ * XXX Dependency: syscall_vm_region() also supports only one flavor.
+ */
- queue_enter(&object->msr_q, new_msr, msync_req_t, msr_q);
- vm_object_unlock(object);
+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_offset_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- queue_enter(&req_q, new_msr, msync_req_t, req_q);
-
-#ifdef MACH_BSD
- if(((rpc_subsystem_t)pager_mux_hash_lookup(object->pager)) ==
- ((rpc_subsystem_t) &vnode_pager_workaround)) {
- (void) vnode_pager_synchronize(
- object->pager,
- object->pager_request,
- offset,
- flush_size,
- sync_flags);
- } else {
- (void) memory_object_synchronize(
- object->pager,
- object->pager_request,
- offset,
- flush_size,
- sync_flags);
- }
-#else
- (void) memory_object_synchronize(
- object->pager,
- object->pager_request,
- offset,
- flush_size,
- sync_flags);
-#endif
- }/* while */
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- /*
- * wait for memory_object_sychronize_completed messages from pager(s)
- */
+ map_addr = (vm_map_offset_t)*address;
+ map_size = (vm_map_size_t)*size;
- while (!queue_empty(&req_q)) {
- msr = (msync_req_t)queue_first(&req_q);
- msr_lock(msr);
- while(msr->flag != VM_MSYNC_DONE) {
- assert_wait((event_t) msr, THREAD_INTERRUPTIBLE);
- msr_unlock(msr);
- thread_block((void (*)(void))0);
- msr_lock(msr);
- }/* while */
- queue_remove(&req_q, msr, msync_req_t, req_q);
- msr_unlock(msr);
- vm_object_deallocate(msr->object);
- msync_req_free(msr);
- }/* queue_iterate */
+ /* legacy conversion */
+ if (VM_REGION_BASIC_INFO == flavor)
+ flavor = VM_REGION_BASIC_INFO_64;
- return(KERN_SUCCESS);
-}/* vm_msync */
+ kr = vm_map_region(map,
+ &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)
+ 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_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
+
+ 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);
+
+ *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)
+ return KERN_INVALID_ADDRESS;
+ return kr;
+}
/*
- * task_wire
+ * vm_region_recurse: A form of vm_region which follows the
+ * submaps in a target map
*
- * 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)
+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)
{
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
- if (must_wire)
- map->wiring_required = TRUE;
- else
- map->wiring_required = FALSE;
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- return(KERN_SUCCESS);
+ 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);
+
+ *address = map_addr;
+ *size = map_size;
+ return kr;
}
/*
- * 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 or reserved memory region.
+ * vm_region_recurse: A form of vm_region which follows the
+ * submaps in a target map
+ *
*/
-kern_return_t
-vm_behavior_set(
+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_address_t map_addr;
+ vm_map_size_t map_size;
+ kern_return_t kr;
+
+ 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);
+
+ *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)
+ 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_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;
+
+ 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);
+
+ 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->is_submap = info64.is_submap;
+ info->behavior = info64.behavior;
+ info->object_id = info64.object_id;
+ 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)
+ return KERN_INVALID_ADDRESS;
+ return kr;
+}
+
+kern_return_t
+mach_vm_purgable_control(
vm_map_t map,
- vm_offset_t start,
- vm_size_t size,
- vm_behavior_t new_behavior)
+ mach_vm_offset_t address,
+ vm_purgable_t control,
+ int *state)
{
- if (map == VM_MAP_NULL)
- return(KERN_INVALID_ARGUMENT);
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- return(vm_map_behavior_set(map, trunc_page(start),
- round_page(start+size), new_behavior));
+ return vm_map_purgable_control(map,
+ vm_map_trunc_page(address, PAGE_MASK),
+ control,
+ state);
}
-#if VM_CPM
-/*
- * Control whether the kernel will permit use of
- * vm_allocate_cpm at all.
- */
-unsigned int vm_allocate_cpm_enabled = 1;
+kern_return_t
+vm_purgable_control(
+ vm_map_t map,
+ vm_offset_t address,
+ vm_purgable_t control,
+ int *state)
+{
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
+
+ return vm_map_purgable_control(map,
+ vm_map_trunc_page(address, PAGE_MASK),
+ control,
+ state);
+}
+
/*
* Ordinarily, the right to allocate CPM is restricted
* to privileged applications (those that can gain access
- * to the host port). Set this variable to zero if you
- * want to let any application allocate CPM.
+ * 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;
kern_return_t
vm_allocate_cpm(
host_priv_t host_priv,
- register vm_map_t map,
- register vm_offset_t *addr,
- register vm_size_t size,
+ vm_map_t map,
+ vm_address_t *addr,
+ vm_size_t size,
int flags)
{
- vm_object_t cpm_obj;
- pmap_t pmap;
- vm_page_t m, pages;
+ vm_map_address_t map_addr;
+ vm_map_size_t map_size;
kern_return_t kr;
- vm_offset_t va, start, end, offset;
-#if MACH_ASSERT
- extern vm_offset_t avail_start, avail_end;
- vm_offset_t prev_addr;
-#endif /* MACH_ASSERT */
-
- boolean_t anywhere = VM_FLAGS_ANYWHERE & flags;
-
- if (!vm_allocate_cpm_enabled)
- return KERN_FAILURE;
- if (vm_allocate_cpm_privileged && host_priv == HOST_PRIV_NULL)
+ if (vm_allocate_cpm_privileged && HOST_PRIV_NULL == host_priv)
return KERN_INVALID_HOST;
- if (map == VM_MAP_NULL)
+ if (VM_MAP_NULL == map)
return KERN_INVALID_ARGUMENT;
-
- assert(host_priv == &realhost);
- if (size == 0) {
- *addr = 0;
- return KERN_SUCCESS;
- }
+ map_addr = (vm_map_address_t)*addr;
+ map_size = (vm_map_size_t)size;
- if (anywhere)
- *addr = vm_map_min(map);
- else
- *addr = trunc_page(*addr);
- size = round_page(size);
-
- if ((kr = cpm_allocate(size, &pages, TRUE)) != KERN_SUCCESS)
- return kr;
-
- cpm_obj = vm_object_allocate(size);
- assert(cpm_obj != VM_OBJECT_NULL);
- assert(cpm_obj->internal);
- assert(cpm_obj->size == size);
- assert(cpm_obj->can_persist == FALSE);
- assert(cpm_obj->pager_created == FALSE);
- assert(cpm_obj->pageout == FALSE);
- assert(cpm_obj->shadow == VM_OBJECT_NULL);
-
- /*
- * Insert pages into object.
- */
+ kr = vm_map_enter_cpm(map,
+ &map_addr,
+ map_size,
+ flags);
- vm_object_lock(cpm_obj);
- for (offset = 0; offset < size; offset += PAGE_SIZE) {
- m = pages;
- pages = NEXT_PAGE(m);
+ *addr = CAST_DOWN(vm_address_t, map_addr);
+ return kr;
+}
- assert(!m->gobbled);
- assert(!m->wanted);
- assert(!m->pageout);
- assert(!m->tabled);
- assert(m->busy);
- assert(m->phys_addr>=avail_start && m->phys_addr<=avail_end);
- m->busy = FALSE;
- vm_page_insert(m, cpm_obj, offset);
- }
- assert(cpm_obj->resident_page_count == size / PAGE_SIZE);
- vm_object_unlock(cpm_obj);
-
- /*
- * Hang onto a reference on the object in case a
- * multi-threaded application for some reason decides
- * to deallocate the portion of the address space into
- * which we will insert this object.
- *
- * Unfortunately, we must insert the object now before
- * we can talk to the pmap module about which addresses
- * must be wired down. Hence, the race with a multi-
- * threaded app.
- */
- vm_object_reference(cpm_obj);
+kern_return_t
+mach_vm_page_query(
+ vm_map_t map,
+ mach_vm_offset_t offset,
+ int *disposition,
+ int *ref_count)
+{
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- /*
- * Insert object into map.
- */
+ return vm_map_page_query_internal(
+ map,
+ vm_map_trunc_page(offset, PAGE_MASK),
+ disposition, ref_count);
+}
- kr = vm_map_enter(
- map,
- addr,
- size,
- (vm_offset_t)0,
- flags,
- cpm_obj,
- (vm_object_offset_t)0,
- FALSE,
- VM_PROT_ALL,
- VM_PROT_ALL,
- VM_INHERIT_DEFAULT);
-
- if (kr != KERN_SUCCESS) {
- /*
- * A CPM object doesn't have can_persist set,
- * so all we have to do is deallocate it to
- * free up these pages.
- */
- assert(cpm_obj->pager_created == FALSE);
- assert(cpm_obj->can_persist == FALSE);
- assert(cpm_obj->pageout == FALSE);
- assert(cpm_obj->shadow == VM_OBJECT_NULL);
- vm_object_deallocate(cpm_obj); /* kill acquired ref */
- vm_object_deallocate(cpm_obj); /* kill creation ref */
- }
+kern_return_t
+vm_map_page_query(
+ vm_map_t map,
+ vm_offset_t offset,
+ int *disposition,
+ int *ref_count)
+{
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
- /*
- * Inform the physical mapping system that the
- * range of addresses may not fault, so that
- * page tables and such can be locked down as well.
- */
- start = *addr;
- end = start + size;
- pmap = vm_map_pmap(map);
- pmap_pageable(pmap, start, end, FALSE);
-
- /*
- * Enter each page into the pmap, to avoid faults.
- * Note that this loop could be coded more efficiently,
- * if the need arose, rather than looking up each page
- * again.
- */
- for (offset = 0, va = start; offset < size;
- va += PAGE_SIZE, offset += PAGE_SIZE) {
- vm_object_lock(cpm_obj);
- m = vm_page_lookup(cpm_obj, (vm_object_offset_t)offset);
- vm_object_unlock(cpm_obj);
- assert(m != VM_PAGE_NULL);
- PMAP_ENTER(pmap, va, m, VM_PROT_ALL, TRUE);
- }
+ return vm_map_page_query_internal(
+ map,
+ vm_map_trunc_page(offset, PAGE_MASK),
+ disposition, ref_count);
+}
-#if MACH_ASSERT
- /*
- * Verify ordering in address space.
- */
- for (offset = 0; offset < size; offset += PAGE_SIZE) {
- vm_object_lock(cpm_obj);
- m = vm_page_lookup(cpm_obj, (vm_object_offset_t)offset);
- vm_object_unlock(cpm_obj);
- if (m == VM_PAGE_NULL)
- panic("vm_allocate_cpm: obj 0x%x off 0x%x no page",
- cpm_obj, offset);
- assert(m->tabled);
- assert(!m->busy);
- assert(!m->wanted);
- assert(!m->fictitious);
- assert(!m->private);
- assert(!m->absent);
- assert(!m->error);
- assert(!m->cleaning);
- assert(!m->precious);
- assert(!m->clustered);
- if (offset != 0) {
- if (m->phys_addr != prev_addr + PAGE_SIZE) {
- printf("start 0x%x end 0x%x va 0x%x\n",
- start, end, va);
- printf("obj 0x%x off 0x%x\n", cpm_obj, offset);
- printf("m 0x%x prev_address 0x%x\n", m,
- prev_addr);
- panic("vm_allocate_cpm: pages not contig!");
- }
- }
- prev_addr = m->phys_addr;
+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)
+{
+ kern_return_t kr;
+
+ if (map == VM_MAP_NULL) {
+ return KERN_INVALID_ARGUMENT;
}
-#endif /* MACH_ASSERT */
- vm_object_deallocate(cpm_obj); /* kill extra ref */
+ 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_address_t *dst_addr)
+{
+ vm_map_offset_t map_addr;
+ kern_return_t kr;
+
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
+
+ kr = vm_map_enter_upl(map, upl, &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)
+{
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
-#else /* VM_CPM */
+ return (vm_map_remove_upl(map, upl));
+}
-/*
- * Interface is defined in all cases, but unless the kernel
- * is built explicitly for this option, the interface does
- * nothing.
- */
+/* Retrieve a upl for an object underlying an address range in a map */
kern_return_t
-vm_allocate_cpm(
- host_priv_t host_priv,
- register vm_map_t map,
- register vm_offset_t *addr,
- register vm_size_t size,
- int flags)
+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)
{
- return KERN_FAILURE;
+ int map_flags;
+ kern_return_t kr;
+
+ if (VM_MAP_NULL == map)
+ return KERN_INVALID_ARGUMENT;
+
+ map_flags = *flags & ~UPL_NOZEROFILL;
+ 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);
+
+ *flags = (map_flags & ~UPL_FORCE_DATA_SYNC);
+ return kr;
}
/*
+ * mach_make_memory_entry_64
+ *
+ * Think of it as a two-stage vm_remap() operation. First
+ * you get a handle. Second, you get map that handle in
+ * somewhere else. Rather than doing it all at once (and
+ * without needing access to the other whole map).
*/
+
kern_return_t
-mach_memory_object_memory_entry_64(
- host_t host,
- boolean_t internal,
- vm_object_offset_t size,
+mach_make_memory_entry_64(
+ vm_map_t target_map,
+ memory_object_size_t *size,
+ memory_object_offset_t offset,
vm_prot_t permission,
- ipc_port_t pager,
- ipc_port_t *entry_handle)
+ ipc_port_t *object_handle,
+ ipc_port_t parent_handle)
{
- vm_named_entry_t user_object;
+ vm_map_version_t version;
+ vm_named_entry_t parent_entry;
+ vm_named_entry_t user_entry;
ipc_port_t user_handle;
- ipc_port_t previous;
kern_return_t kr;
+ vm_map_t real_map;
- if (host == HOST_NULL)
- return(KERN_INVALID_HOST);
+ /* needed for call to vm_map_lookup_locked */
+ boolean_t wired;
+ 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;
- user_object = (vm_named_entry_t)
- kalloc(sizeof (struct vm_named_entry));
- if(user_object == NULL)
- return KERN_FAILURE;
- named_entry_lock_init(user_object);
- user_handle = ipc_port_alloc_kernel();
- ip_lock(user_handle);
+ /* 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;
- /* make a sonce right */
- user_handle->ip_sorights++;
- ip_reference(user_handle);
+ /*
+ * 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;
+
+ if (((permission & 0x00FF0000) &
+ ~(MAP_MEM_ONLY |
+ MAP_MEM_NAMED_CREATE |
+ MAP_MEM_PURGABLE |
+ MAP_MEM_NAMED_REUSE |
+ MAP_MEM_USE_DATA_ADDR |
+ MAP_MEM_VM_COPY |
+ MAP_MEM_VM_SHARE))) {
+ /*
+ * Unknown flag: reject for forward compatibility.
+ */
+ return KERN_INVALID_VALUE;
+ }
- user_handle->ip_destination = IP_NULL;
- user_handle->ip_receiver_name = MACH_PORT_NULL;
- user_handle->ip_receiver = ipc_space_kernel;
+ if (parent_handle != IP_NULL &&
+ ip_kotype(parent_handle) == IKOT_NAMED_ENTRY) {
+ parent_entry = (vm_named_entry_t) parent_handle->ip_kobject;
+ } else {
+ parent_entry = NULL;
+ }
+
+ 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);
+
+ user_handle = IP_NULL;
+ user_entry = NULL;
+
+ map_offset = vm_map_trunc_page(offset, PAGE_MASK);
+
+ if (permission & MAP_MEM_ONLY) {
+ boolean_t parent_is_object;
+
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+
+ if (use_data_addr || parent_entry == NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ parent_is_object = !(parent_entry->is_sub_map ||
+ parent_entry->is_pager);
+ object = parent_entry->backing.object;
+ if(parent_is_object && object != VM_OBJECT_NULL)
+ wimg_mode = object->wimg_bits;
+ 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_USE_DEFAULT;
+ } else if (access == MAP_MEM_INNERWBACK) {
+ SET_MAP_MEM(access, parent_entry->protection);
+ wimg_mode = VM_WIMG_INNERWBACK;
+ } 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_object_lock(object);
+ vm_object_change_wimg_mode(object, wimg_mode);
+ vm_object_unlock(object);
+ }
+ }
+ if (object_handle)
+ *object_handle = IP_NULL;
+ return KERN_SUCCESS;
+ } else if (permission & MAP_MEM_NAMED_CREATE) {
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+
+ if (use_data_addr) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ 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) ANON_MAX_SIZE) {
+ /*
+ * 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.
+ */
+ kr = KERN_FAILURE;
+ goto make_mem_done;
+ }
+
+ 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 */
+ vm_object_deallocate(object);
+ kr = KERN_INVALID_ARGUMENT;
+ goto make_mem_done;
+ }
+ object->purgable = VM_PURGABLE_NONVOLATILE;
+ assert(object->vo_purgeable_owner == NULL);
+ assert(object->resident_page_count == 0);
+ assert(object->wired_page_count == 0);
+ vm_object_lock(object);
+ vm_purgeable_nonvolatile_enqueue(object,
+ current_task());
+ vm_object_unlock(object);
+ }
+
+ /*
+ * 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_USE_DEFAULT;
+ } else if (access == MAP_MEM_INNERWBACK) {
+ wimg_mode = VM_WIMG_INNERWBACK;
+ } else if (access == MAP_MEM_WTHRU) {
+ wimg_mode = VM_WIMG_WTHRU;
+ } else if (access == MAP_MEM_WCOMB) {
+ wimg_mode = VM_WIMG_WCOMB;
+ }
+ 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;
+ object->true_share = TRUE;
+
+ 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. */
- /* make a send right */
- user_handle->ip_mscount++;
- user_handle->ip_srights++;
- ip_reference(user_handle);
+ *size = CAST_DOWN(vm_size_t, map_size);
+ *object_handle = user_handle;
+ return KERN_SUCCESS;
+ }
- ipc_port_nsrequest(user_handle, 1, user_handle, &previous);
- /* nsrequest unlocks user_handle */
+ if (permission & MAP_MEM_VM_COPY) {
+ vm_map_copy_t copy;
- user_object->object = NULL;
- user_object->size = size;
- user_object->offset = 0;
- user_object->backing.pager = pager;
- user_object->protection = permission;
- user_object->internal = internal;
- user_object->is_sub_map = FALSE;
- user_object->ref_count = 1;
-
- ipc_kobject_set(user_handle, (ipc_kobject_t) user_object,
- IKOT_NAMED_ENTRY);
- *entry_handle = user_handle;
- return KERN_SUCCESS;
-}
+ if (target_map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
-kern_return_t
-mach_memory_object_memory_entry(
- host_t host,
- boolean_t internal,
- vm_size_t size,
- vm_prot_t permission,
- ipc_port_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);
-}
+ if (use_data_addr) {
+ map_size = (vm_map_round_page(offset + *size,
+ PAGE_MASK) -
+ map_offset);
+ offset_in_page = offset - map_offset;
+ } else {
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+ offset_in_page = 0;
+ }
+ kr = vm_map_copyin(target_map,
+ map_offset,
+ map_size,
+ FALSE,
+ ©);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
+
+ 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_pager = 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, map_size);
+ *object_handle = user_handle;
+ return KERN_SUCCESS;
+ }
-/*
- */
+ if (permission & MAP_MEM_VM_SHARE) {
+ vm_map_copy_t copy;
+ vm_prot_t cur_prot, max_prot;
-kern_return_t
-mach_make_memory_entry_64(
- vm_map_t target_map,
- vm_object_size_t *size,
- vm_object_offset_t offset,
- vm_prot_t permission,
- ipc_port_t *object_handle,
- ipc_port_t parent_entry)
-{
- vm_map_version_t version;
- vm_named_entry_t user_object;
- ipc_port_t user_handle;
- ipc_port_t previous;
- kern_return_t kr;
- vm_map_t pmap_map;
+ if (target_map == VM_MAP_NULL) {
+ return KERN_INVALID_TASK;
+ }
- /* needed for call to vm_map_lookup_locked */
- boolean_t wired;
- vm_object_offset_t obj_off;
- vm_prot_t prot;
- vm_object_offset_t lo_offset, hi_offset;
- vm_behavior_t behavior;
- vm_object_t object;
+ if (use_data_addr) {
+ map_size = (vm_map_round_page(offset + *size,
+ PAGE_MASK) -
+ map_offset);
+ offset_in_page = offset - map_offset;
+ } else {
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+ offset_in_page = 0;
+ }
- /* needed for direct map entry manipulation */
- vm_map_entry_t map_entry;
- vm_map_t local_map;
- vm_object_size_t mappable_size;
+ kr = vm_map_copy_extract(target_map,
+ map_offset,
+ map_size,
+ ©,
+ &cur_prot,
+ &max_prot);
+ if (kr != KERN_SUCCESS) {
+ return kr;
+ }
-
- user_object = (vm_named_entry_t)
- kalloc(sizeof (struct vm_named_entry));
- if(user_object == NULL)
- return KERN_FAILURE;
- named_entry_lock_init(user_object);
- user_handle = ipc_port_alloc_kernel();
- ip_lock(user_handle);
+ 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;
+ }
+ }
- /* make a sonce right */
- user_handle->ip_sorights++;
- ip_reference(user_handle);
+ kr = mach_memory_entry_allocate(&user_entry, &user_handle);
+ if (kr != KERN_SUCCESS) {
+ vm_map_copy_discard(copy);
+ return KERN_FAILURE;
+ }
- user_handle->ip_destination = IP_NULL;
- user_handle->ip_receiver_name = MACH_PORT_NULL;
- user_handle->ip_receiver = ipc_space_kernel;
+ user_entry->backing.copy = copy;
+ user_entry->internal = FALSE;
+ user_entry->is_sub_map = FALSE;
+ user_entry->is_pager = 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, map_size);
+ *object_handle = user_handle;
+ return KERN_SUCCESS;
+ }
- /* make a send right */
- user_handle->ip_mscount++;
- user_handle->ip_srights++;
- ip_reference(user_handle);
+ if (parent_entry == NULL ||
+ (permission & MAP_MEM_NAMED_REUSE)) {
- ipc_port_nsrequest(user_handle, 1, user_handle, &previous);
- /* nsrequest unlocks user_handle */
+ if (use_data_addr) {
+ map_size = vm_map_round_page(offset + *size, PAGE_MASK) - map_offset;
+ offset_in_page = offset - map_offset;
+ } else {
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+ offset_in_page = 0;
+ }
- user_object->backing.pager = NULL;
- user_object->ref_count = 1;
+ /* Create a named object based on address range within the task map */
+ /* Go find the object at given address */
- if(parent_entry == NULL) {
- /* 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;
+ }
- permission &= VM_PROT_ALL;
+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, offset,
- permission, &version,
- &object, &obj_off, &prot, &wired, &behavior,
- &lo_offset, &hi_offset, &pmap_map);
+ kr = vm_map_lookup_locked(&target_map, map_offset,
+ 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 ((prot & permission) != permission) {
+ 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 (((prot & protections) != protections)
+ || (object == kernel_object)) {
kr = KERN_INVALID_RIGHT;
vm_object_unlock(object);
vm_map_unlock_read(target_map);
- if(pmap_map != target_map)
- vm_map_unlock_read(pmap_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 */
-
- local_map = target_map;
-redo_lookup:
+
+ /*
+ * 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_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;
+ }
while(TRUE) {
- if(!vm_map_lookup_entry(local_map, offset, &map_entry)) {
+ if(!vm_map_lookup_entry(local_map,
+ local_offset, &map_entry)) {
kr = KERN_INVALID_ARGUMENT;
- vm_object_unlock(object);
vm_map_unlock_read(target_map);
- if(pmap_map != target_map)
- vm_map_unlock_read(pmap_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_object_unlock(object);
vm_map_unlock_read(target_map);
- if(pmap_map != target_map)
- vm_map_unlock_read(pmap_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(target_map);
- if(pmap_map != target_map)
- vm_map_unlock_read(pmap_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;
}
}
- if(((map_entry->max_protection) & permission) != permission) {
+
+ /*
+ * 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 (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(pmap_map != target_map)
- vm_map_unlock_read(pmap_map);
+ if(real_map != target_map)
+ vm_map_unlock_read(real_map);
+ vm_object_deallocate(object);
+ object = VM_OBJECT_NULL;
goto make_mem_done;
}
- if(object->internal) {
+
+ mappable_size = fault_info.hi_offset - obj_off;
+ total_size = map_entry->vme_end - map_entry->vme_start;
+ 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 (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)
+ break;
+ mappable_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;
+ } else {
+ break;
+ }
+
+ }
+ }
+
+ if (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(offset,
+ VM_MAP_PAGE_MASK(target_map)));
+ vm_map_clip_end(target_map,
+ map_entry,
+ (vm_map_round_page(offset + map_size,
+ VM_MAP_PAGE_MASK(target_map))));
+ force_shadow = TRUE;
+
+ if ((map_entry->vme_end - offset) < map_size) {
+ map_size = map_entry->vme_end - offset;
+ }
+ 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 >
- ((vm_object_size_t)map_entry->vme_end -
- map_entry->vme_start))) {
+ if (force_shadow ||
+ ((map_entry->needs_copy ||
+ object->shadowed ||
+ (object->vo_size > total_size &&
+ (map_entry->offset != 0 ||
+ object->vo_size >
+ vm_map_round_page(total_size,
+ VM_MAP_PAGE_MASK(target_map)))))
+ && !object->true_share)) {
+ /*
+ * We have to unlock the VM object before
+ * trying to upgrade the VM map lock, to
+ * honor lock ordering (map then object).
+ * Otherwise, we would deadlock if another
+ * thread holds a read lock on the VM map and
+ * is trying to acquire the VM object's lock.
+ * We still hold an extra reference on the
+ * VM object, guaranteeing that it won't
+ * disappear.
+ */
+ vm_object_unlock(object);
+
if (vm_map_lock_read_to_write(target_map)) {
- vm_map_lock_read(target_map);
+ /*
+ * We couldn't upgrade our VM map lock
+ * from "read" to "write" and we lost
+ * our "read" lock.
+ * Start all over again...
+ */
+ vm_object_deallocate(object); /* extra ref */
+ target_map = original_map;
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;
+#if 00
+ vm_object_unlock(object);
+#endif
+
+ prot = map_entry->protection & ~VM_PROT_WRITE;
+
+ if (override_nx(target_map, map_entry->alias) && prot)
+ prot |= VM_PROT_EXECUTE;
+
+ vm_object_pmap_protect(
+ object, map_entry->offset,
+ total_size,
+ ((map_entry->is_shared
+ || target_map->mapped_in_other_pmaps)
+ ? PMAP_NULL :
+ target_map->pmap),
+ 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) {
+ assert((next_entry->wired_count == 0) ||
+ (map_entry->wired_count));
+
+ if(next_entry->object.vm_object == object) {
+ vm_object_reference_locked(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);
+ next_entry->needs_copy = FALSE;
+ } else {
+ panic("mach_make_memory_entry_64:"
+ " map entries out of sync\n");
+ }
+ total_size -=
+ next_entry->vme_end
+ - next_entry->vme_start;
+ next_entry = next_entry->vme_next;
+ }
- vm_object_shadow(&map_entry->object.vm_object,
- &map_entry->offset,
- (map_entry->vme_end
- - map_entry->vme_start));
- map_entry->needs_copy = FALSE;
- vm_object_unlock(object);
- object = map_entry->object.vm_object;
- vm_object_lock(object);
- object->size = map_entry->vme_end
- - map_entry->vme_start;
- obj_off = (offset - map_entry->vme_start) +
- map_entry->offset;
- lo_offset = map_entry->offset;
- hi_offset = (map_entry->vme_end -
- map_entry->vme_start) +
- map_entry->offset;
-
- vm_map_lock_write_to_read(target_map);
+ /*
+ * Transfer our extra reference to the
+ * shadow object.
+ */
+ vm_object_reference_locked(shadow_object);
+ vm_object_deallocate(object); /* extra ref */
+ object = shadow_object;
+ obj_off = (local_offset - map_entry->vme_start)
+ + map_entry->offset;
+
+ vm_map_lock_write_to_read(target_map);
}
}
/* target of ipc's, etc. The code above, protecting */
/* 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_INNERWBACK) {
+ wimg_mode = VM_WIMG_INNERWBACK;
+ } else if (access == MAP_MEM_WTHRU) {
+ wimg_mode = VM_WIMG_WTHRU;
+ } else if (access == MAP_MEM_WCOMB) {
+ wimg_mode = VM_WIMG_WCOMB;
+ }
+ }
+#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;
- user_object->object = object;
- user_object->internal = object->internal;
- user_object->is_sub_map = FALSE;
- user_object->offset = obj_off;
- user_object->protection = permission;
+ 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
+ * need to hold a reference on the VM object. Use the extra
+ * reference we took earlier to keep the object alive when we
+ * had to unlock it.
+ */
+
+ vm_map_unlock_read(target_map);
+ if(real_map != target_map)
+ vm_map_unlock_read(real_map);
+
+ if (object->wimg_bits != wimg_mode)
+ vm_object_change_wimg_mode(object, wimg_mode);
/* the size of mapped entry that overlaps with our region */
/* which is targeted for share. */
/* offset of our beg addr within entry */
/* it corresponds to this: */
- mappable_size = hi_offset - obj_off;
- if(*size > mappable_size)
- *size = mappable_size;
+ if(map_size > mappable_size)
+ map_size = mappable_size;
+
+ if (permission & MAP_MEM_NAMED_REUSE) {
+ /*
+ * Compare what we got with the "parent_entry".
+ * If they match, re-use the "parent_entry" instead
+ * of creating a new one.
+ */
+ if (parent_entry != NULL &&
+ 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 &&
+ ((!use_data_addr && (parent_entry->data_offset == 0)) ||
+ (use_data_addr && (parent_entry->data_offset == offset_in_page)))) {
+ /*
+ * We have a match: re-use "parent_entry".
+ */
+ /* release our extra reference on object */
+ vm_object_unlock(object);
+ vm_object_deallocate(object);
+ /* parent_entry->ref_count++; XXX ? */
+ /* Get an extra send-right on handle */
+ ipc_port_copy_send(parent_handle);
+
+ *size = CAST_DOWN(vm_size_t, map_size);
+ *object_handle = parent_handle;
+ return KERN_SUCCESS;
+ } else {
+ /*
+ * No match: we need to create a new entry.
+ * fall through...
+ */
+ }
+ }
+
+ vm_object_unlock(object);
+ if (mach_memory_entry_allocate(&user_entry, &user_handle)
+ != KERN_SUCCESS) {
+ /* release our unused reference on the object */
+ vm_object_deallocate(object);
+ return KERN_FAILURE;
+ }
- user_object->size = *size;
+ 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->data_offset = offset_in_page;
+ user_entry->protection = protections;
+ SET_MAP_MEM(GET_MAP_MEM(permission), user_entry->protection);
+ user_entry->size = map_size;
/* user_object pager and internal fields are not used */
/* when the object field is filled in. */
- object->ref_count++; /* we now point to this object, hold on */
- vm_object_res_reference(object);
- vm_object_unlock(object);
- ipc_kobject_set(user_handle, (ipc_kobject_t) user_object,
- IKOT_NAMED_ENTRY);
- *size = user_object->size;
+ *size = CAST_DOWN(vm_size_t, map_size);
*object_handle = user_handle;
- vm_map_unlock_read(target_map);
- if(pmap_map != target_map)
- vm_map_unlock_read(pmap_map);
return KERN_SUCCESS;
- } else {
-
- vm_named_entry_t parent_object;
+ } else {
/* The new object will be base on an existing named object */
- if(ip_kotype(parent_entry) != IKOT_NAMED_ENTRY) {
+ if (parent_entry == NULL) {
kr = KERN_INVALID_ARGUMENT;
goto make_mem_done;
}
- parent_object = (vm_named_entry_t)parent_entry->ip_kobject;
- if(permission & parent_object->protection != permission) {
- kr = KERN_INVALID_ARGUMENT;
+
+ if (use_data_addr) {
+ /*
+ * 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_pager || parent_entry->is_sub_map) {
+ panic("Shouldn't be using data address with a parent entry that is a submap or pager.");
+ }
+ /*
+ * 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_offset = vm_map_trunc_page(offset + parent_entry->data_offset, PAGE_MASK);
+ offset_in_page = (offset + parent_entry->data_offset) - map_offset;
+ map_size = vm_map_round_page(offset + parent_entry->data_offset + *size, PAGE_MASK) - map_offset;
+ } else {
+ map_size = vm_map_round_page(*size, PAGE_MASK);
+ offset_in_page = 0;
+
+ if((offset + map_size) > parent_entry->size) {
+ kr = KERN_INVALID_ARGUMENT;
+ 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 &= parent_entry->protection;
+ }
+ if((protections & parent_entry->protection) != protections) {
+ kr = KERN_PROTECTION_FAILURE;
goto make_mem_done;
}
- if((offset + *size) > parent_object->size) {
- kr = KERN_INVALID_ARGUMENT;
+
+ if (mach_memory_entry_allocate(&user_entry, &user_handle)
+ != KERN_SUCCESS) {
+ kr = KERN_FAILURE;
goto make_mem_done;
}
- user_object->object = parent_object->object;
- user_object->size = *size;
- user_object->offset = parent_object->offset + offset;
- user_object->protection = permission;
- if(parent_object->is_sub_map) {
- user_object->backing.map = parent_object->backing.map;
- vm_map_lock(user_object->backing.map);
- user_object->backing.map->ref_count++;
- vm_map_unlock(user_object->backing.map);
+ user_entry->size = map_size;
+ user_entry->offset = parent_entry->offset + map_offset;
+ 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);
}
- else {
- user_object->backing.pager = parent_object->backing.pager;
+
+ 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? */
+ } 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);
+#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);
}
- user_object->internal = parent_object->internal;
- user_object->is_sub_map = parent_object->is_sub_map;
-
- if(parent_object->object != NULL) {
- /* we now point to this object, hold on */
- vm_object_reference(parent_object->object);
- vm_object_lock(parent_object->object);
- parent_object->object->true_share = TRUE;
- vm_object_unlock(parent_object->object);
+#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);
}
- ipc_kobject_set(user_handle, (ipc_kobject_t) user_object,
- IKOT_NAMED_ENTRY);
+ *size = CAST_DOWN(vm_size_t, map_size);
*object_handle = user_handle;
return KERN_SUCCESS;
}
-
-
make_mem_done:
- ipc_port_dealloc_kernel(user_handle);
- kfree((vm_offset_t)user_object, sizeof (struct vm_named_entry));
+ if (user_handle != IP_NULL) {
+ /*
+ * 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_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;
}
vm_prot_t permission,
ipc_port_t *object_handle,
ipc_port_t parent_entry)
-{
- vm_object_offset_t size_64;
+{
+ memory_object_size_t mo_size;
kern_return_t kr;
- size_64 = (vm_object_offset_t)*size;
- kr = mach_make_memory_entry_64(target_map, &size_64,
- (vm_object_offset_t)offset, permission, object_handle,
+ 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 = (vm_size_t)size_64;
+ *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
-vm_region_object_create(
- vm_map_t target_map,
- vm_size_t size,
- ipc_port_t *object_handle)
+task_wire(
+ vm_map_t map,
+ boolean_t must_wire)
+{
+ if (map == VM_MAP_NULL)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (must_wire)
+ map->wiring_required = TRUE;
+ else
+ map->wiring_required = FALSE;
+
+ return(KERN_SUCCESS);
+}
+
+__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_object;
+ vm_named_entry_t user_entry;
ipc_port_t user_handle;
- kern_return_t kr;
+ ipc_port_t previous;
- pmap_t new_pmap = pmap_create((vm_size_t) 0);
- ipc_port_t previous;
- vm_map_t new_map;
-
- if(new_pmap == PMAP_NULL)
+ user_entry = (vm_named_entry_t) kalloc(sizeof *user_entry);
+ if (user_entry == NULL)
return KERN_FAILURE;
- user_object = (vm_named_entry_t)
- kalloc(sizeof (struct vm_named_entry));
- if(user_object == NULL) {
- pmap_destroy(new_pmap);
- return KERN_FAILURE;
- }
- named_entry_lock_init(user_object);
- user_handle = ipc_port_alloc_kernel();
+ named_entry_lock_init(user_entry);
+ user_handle = ipc_port_alloc_kernel();
+ if (user_handle == IP_NULL) {
+ kfree(user_entry, sizeof *user_entry);
+ return KERN_FAILURE;
+ }
ip_lock(user_handle);
/* make a sonce right */
ipc_port_nsrequest(user_handle, 1, user_handle, &previous);
/* nsrequest unlocks user_handle */
- /* Create a named object based on a submap of specified size */
-
- new_map = vm_map_create(new_pmap, 0, size, TRUE);
- user_object->backing.map = new_map;
+ user_entry->backing.pager = NULL;
+ user_entry->is_sub_map = FALSE;
+ user_entry->is_pager = 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;
+ ipc_kobject_set(user_handle, (ipc_kobject_t) user_entry,
+ IKOT_NAMED_ENTRY);
- user_object->object = VM_OBJECT_NULL;
- user_object->internal = TRUE;
- user_object->is_sub_map = TRUE;
- user_object->offset = 0;
- user_object->protection = VM_PROT_ALL;
- user_object->size = size;
- user_object->ref_count = 1;
+ *user_entry_p = user_entry;
+ *user_handle_p = user_handle;
- ipc_kobject_set(user_handle, (ipc_kobject_t) user_object,
- IKOT_NAMED_ENTRY);
- *object_handle = user_handle;
return KERN_SUCCESS;
-
}
-/* For a given range, check all map entries. If the entry coresponds to */
-/* the old vm_region/map provided on the call, replace it with the */
-/* corresponding range in the new vm_region/map */
-kern_return_t vm_map_region_replace(
- vm_map_t target_map,
- ipc_port_t old_region,
- ipc_port_t new_region,
- vm_offset_t start,
- vm_offset_t end)
+/*
+ * 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)
{
- vm_named_entry_t old_object;
- vm_named_entry_t new_object;
- vm_map_t old_submap;
- vm_map_t new_submap;
- vm_offset_t addr;
- vm_map_entry_t entry;
- int nested_pmap = 0;
+ unsigned int access;
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
+ if (host == HOST_NULL)
+ return(KERN_INVALID_HOST);
- vm_map_lock(target_map);
- old_object = (vm_named_entry_t)old_region->ip_kobject;
- new_object = (vm_named_entry_t)new_region->ip_kobject;
- if((!old_object->is_sub_map) || (!new_object->is_sub_map)) {
- vm_map_unlock(target_map);
- return KERN_INVALID_ARGUMENT;
- }
- old_submap = (vm_map_t)old_object->backing.map;
- new_submap = (vm_map_t)new_object->backing.map;
- vm_map_lock(old_submap);
- if((old_submap->min_offset != new_submap->min_offset) ||
- (old_submap->max_offset != new_submap->max_offset)) {
- vm_map_unlock(old_submap);
- vm_map_unlock(target_map);
- return KERN_INVALID_ARGUMENT;
- }
- if(!vm_map_lookup_entry(target_map, start, &entry)) {
- /* if the src is not contained, the entry preceeds */
- /* our range */
- addr = entry->vme_start;
- if(entry == vm_map_to_entry(target_map)) {
- vm_map_unlock(old_submap);
- vm_map_unlock(target_map);
- return KERN_SUCCESS;
- }
- vm_map_lookup_entry(target_map, addr, &entry);
- }
- addr = entry->vme_start;
- vm_map_reference(old_submap);
- while((entry != vm_map_to_entry(target_map)) &&
- (entry->vme_start < end)) {
- if((entry->is_sub_map) &&
- (entry->object.sub_map == old_submap)) {
- entry->object.sub_map = new_submap;
- if(entry->use_pmap) {
- if((start & 0xfffffff) ||
- ((end - start) != 0x10000000)) {
- vm_map_unlock(old_submap);
- vm_map_unlock(target_map);
- return KERN_INVALID_ARGUMENT;
- }
- nested_pmap = 1;
- }
- vm_map_reference(new_submap);
- vm_map_deallocate(old_submap);
- }
- entry = entry->vme_next;
- addr = entry->vme_start;
- }
- if(nested_pmap) {
-#ifndef i386
- pmap_unnest(target_map->pmap, start, end - start);
- pmap_nest(target_map->pmap, new_submap->pmap,
- start, end - start);
-#endif i386
- } else {
- pmap_remove(target_map->pmap, start, end);
+ if (mach_memory_entry_allocate(&user_entry, &user_handle)
+ != KERN_SUCCESS) {
+ return KERN_FAILURE;
}
- vm_map_unlock(old_submap);
- vm_map_unlock(target_map);
- return KERN_SUCCESS;
-}
+ 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);
-void
-mach_destroy_memory_entry(
- ipc_port_t port)
+ *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)
{
- 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->ref_count-=1;
- if(named_entry->ref_count == 0) {
- if(named_entry->object) {
- /* release the memory object we've been pointing to */
- vm_object_deallocate(named_entry->object);
- }
- if(named_entry->is_sub_map) {
- vm_map_deallocate(named_entry->backing.map);
- }
- kfree((vm_offset_t)port->ip_kobject,
- sizeof (struct vm_named_entry));
- } else
- mutex_unlock(&(named_entry)->Lock);
+ return mach_memory_object_memory_entry_64( host, internal,
+ (vm_object_offset_t)size, permission, pager, entry_handle);
}
kern_return_t
-vm_map_page_query(
- vm_map_t target_map,
- vm_offset_t offset,
- int *disposition,
- int *ref_count)
+mach_memory_entry_purgable_control(
+ ipc_port_t entry_port,
+ vm_purgable_t control,
+ int *state)
{
- vm_map_entry_t map_entry;
- vm_object_t object;
- vm_page_t m;
+ kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
-restart_page_query:
- *disposition = 0;
- *ref_count = 0;
- vm_map_lock(target_map);
- if(!vm_map_lookup_entry(target_map, offset, &map_entry)) {
- vm_map_unlock(target_map);
- return KERN_FAILURE;
- }
- offset -= map_entry->vme_start; /* adjust to offset within entry */
- offset += map_entry->offset; /* adjust to target object offset */
- if(map_entry->object.vm_object != VM_OBJECT_NULL) {
- if(!map_entry->is_sub_map) {
- object = map_entry->object.vm_object;
- } else {
- vm_map_unlock(target_map);
- target_map = map_entry->object.sub_map;
- goto restart_page_query;
- }
- } else {
- vm_map_unlock(target_map);
- return KERN_FAILURE;
- }
- vm_object_lock(object);
- vm_map_unlock(target_map);
- while(TRUE) {
- m = vm_page_lookup(object, offset);
- if (m != VM_PAGE_NULL) {
- *disposition |= VM_PAGE_QUERY_PAGE_PRESENT;
- break;
- } else {
- if(object->shadow) {
- offset += object->shadow_offset;
- vm_object_unlock(object);
- object = object->shadow;
- vm_object_lock(object);
- continue;
- }
- vm_object_unlock(object);
- return KERN_FAILURE;
- }
+ if (entry_port == IP_NULL ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
}
+ if (control != VM_PURGABLE_SET_STATE &&
+ control != VM_PURGABLE_GET_STATE)
+ return(KERN_INVALID_ARGUMENT);
+
+ if (control == VM_PURGABLE_SET_STATE &&
+ (((*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) entry_port->ip_kobject;
- /* The ref_count is not strictly accurate, it measures the number */
- /* of entities holding a ref on the object, they may not be mapping */
- /* the object or may not be mapping the section holding the */
- /* target page but its still a ball park number and though an over- */
- /* count, it picks up the copy-on-write cases */
+ named_entry_lock(mem_entry);
+
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_pager ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
- /* We could also get a picture of page sharing from pmap_attributes */
- /* but this would under count as only faulted-in mappings would */
- /* show up. */
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
- *ref_count = object->ref_count;
+ vm_object_lock(object);
- if (m->fictitious) {
- *disposition |= VM_PAGE_QUERY_PAGE_FICTITIOUS;
+ /* check that named entry covers entire object ? */
+ if (mem_entry->offset != 0 || object->vo_size != mem_entry->size) {
vm_object_unlock(object);
- return KERN_SUCCESS;
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
- if (m->dirty)
- *disposition |= VM_PAGE_QUERY_PAGE_DIRTY;
- else if(pmap_is_modified(m->phys_addr))
- *disposition |= VM_PAGE_QUERY_PAGE_DIRTY;
+ named_entry_unlock(mem_entry);
- if (m->reference)
- *disposition |= VM_PAGE_QUERY_PAGE_REF;
- else if(pmap_is_referenced(m->phys_addr))
- *disposition |= VM_PAGE_QUERY_PAGE_REF;
+ kr = vm_object_purgable_control(object, control, state);
vm_object_unlock(object);
- return KERN_SUCCESS;
-
-}
-kern_return_t
-set_dp_control_port(
- host_priv_t host_priv,
- ipc_port_t control_port)
-{
- if (host_priv == HOST_PRIV_NULL)
- return (KERN_INVALID_HOST);
- dynamic_pager_control_port = control_port;
- return KERN_SUCCESS;
+ return kr;
}
kern_return_t
-get_dp_control_port(
- host_priv_t host_priv,
- ipc_port_t *control_port)
+mach_memory_entry_get_page_counts(
+ ipc_port_t entry_port,
+ unsigned int *resident_page_count,
+ unsigned int *dirty_page_count)
{
- if (host_priv == HOST_PRIV_NULL)
- return (KERN_INVALID_HOST);
- *control_port = dynamic_pager_control_port;
- return KERN_SUCCESS;
-
-}
+ kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ vm_object_offset_t offset;
+ vm_object_size_t size;
-void
-mach_destroy_upl(
- ipc_port_t port)
-{
- upl_t upl;
-#if MACH_ASSERT
- assert(ip_kotype(port) == IKOT_NAMED_ENTRY);
-#endif /* MACH_ASSERT */
- upl = (upl_t)port->ip_kobject;
- mutex_lock(&(upl)->Lock);
- upl->ref_count-=1;
- if(upl->ref_count == 0) {
- mutex_unlock(&(upl)->Lock);
- uc_upl_abort(upl, UPL_ABORT_ERROR);
- } else
- mutex_unlock(&(upl)->Lock);
-}
+ if (entry_port == IP_NULL ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
+ }
-/* Retrieve a upl for an object underlying an address range in a map */
+ mem_entry = (vm_named_entry_t) entry_port->ip_kobject;
-kern_return_t
-vm_map_get_upl(
- vm_map_t map,
- vm_offset_t offset,
- vm_size_t *upl_size,
- upl_t *upl,
- upl_page_info_t **page_list,
- int *count,
- int *flags,
- int force_data_sync)
-{
- vm_map_entry_t entry;
- int caller_flags;
- int sync_cow_data = FALSE;
- vm_object_t local_object;
- vm_offset_t local_offset;
- vm_offset_t local_start;
- kern_return_t ret;
+ named_entry_lock(mem_entry);
- caller_flags = *flags;
- if (!(caller_flags & UPL_COPYOUT_FROM)) {
- sync_cow_data = TRUE;
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_pager ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
- if(upl == NULL)
+
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
return KERN_INVALID_ARGUMENT;
-REDISCOVER_ENTRY:
- vm_map_lock(map);
- if (vm_map_lookup_entry(map, offset, &entry)) {
- if((entry->vme_end - offset) < *upl_size) {
- *upl_size = entry->vme_end - offset;
- }
- /*
- * Create an object if necessary.
- */
- if (entry->object.vm_object == VM_OBJECT_NULL) {
- entry->object.vm_object = vm_object_allocate(
- (vm_size_t)(entry->vme_end - entry->vme_start));
- entry->offset = 0;
- }
- if (!(caller_flags & UPL_COPYOUT_FROM)) {
- if (entry->needs_copy
- || entry->object.vm_object->copy) {
- vm_map_t local_map;
- vm_object_t object;
- vm_object_offset_t offset_hi;
- vm_object_offset_t offset_lo;
- vm_object_offset_t new_offset;
- vm_prot_t prot;
- boolean_t wired;
- vm_behavior_t behavior;
- vm_map_version_t version;
- vm_map_t pmap_map;
-
- local_map = map;
- vm_map_lock_write_to_read(map);
- if(vm_map_lookup_locked(&local_map,
- offset, VM_PROT_WRITE,
- &version, &object,
- &new_offset, &prot, &wired,
- &behavior, &offset_lo,
- &offset_hi, &pmap_map)) {
- vm_map_unlock(local_map);
- return KERN_FAILURE;
- }
- if (pmap_map != map) {
- vm_map_unlock(pmap_map);
- }
- vm_object_unlock(object);
- vm_map_unlock(local_map);
+ }
- goto REDISCOVER_ENTRY;
- }
- }
- if (entry->is_sub_map) {
- vm_map_t submap;
+ vm_object_lock(object);
- submap = entry->object.sub_map;
- local_start = entry->vme_start;
- local_offset = entry->offset;
- vm_map_reference(submap);
- vm_map_unlock(map);
+ offset = mem_entry->offset;
+ size = mem_entry->size;
- ret = (vm_map_get_upl(submap,
- local_offset + (offset - local_start),
- upl_size, upl, page_list, count,
- flags, force_data_sync));
+ named_entry_unlock(mem_entry);
- vm_map_deallocate(submap);
- return ret;
- }
-
- if (sync_cow_data) {
- if (entry->object.vm_object->shadow) {
- int flags;
-
- local_object = entry->object.vm_object;
- local_start = entry->vme_start;
- local_offset = entry->offset;
- vm_object_reference(local_object);
- vm_map_unlock(map);
+ kr = vm_object_get_page_counts(object, offset, size, resident_page_count, dirty_page_count);
- if(local_object->copy == NULL) {
- flags = MEMORY_OBJECT_DATA_SYNC;
- } else {
- flags = MEMORY_OBJECT_COPY_SYNC;
- }
+ vm_object_unlock(object);
- if((local_object->paging_offset) &&
- (local_object->pager == 0)) {
- /*
- * do a little clean-up for our unorthodox
- * entry into a pager call from a non-pager
- * context. Normally the pager code
- * assumes that an object it has been called
- * with has a backing pager and so does
- * not bother to check the pager field
- * before relying on the paging_offset
- */
- vm_object_lock(local_object);
- if (local_object->pager == 0) {
- local_object->paging_offset = 0;
- }
- vm_object_unlock(local_object);
- }
-
- memory_object_lock_request(
- local_object, ((offset - local_start)
- + local_offset) +
- local_object->paging_offset,
- (vm_object_size_t)*upl_size, FALSE,
- flags,
- VM_PROT_NO_CHANGE, NULL, 0);
- sync_cow_data = FALSE;
- goto REDISCOVER_ENTRY;
- }
- }
+ return kr;
+}
- if (force_data_sync) {
-
- local_object = entry->object.vm_object;
- local_start = entry->vme_start;
- local_offset = entry->offset;
- vm_object_reference(local_object);
- vm_map_unlock(map);
-
- if((local_object->paging_offset) &&
- (local_object->pager == 0)) {
- /*
- * do a little clean-up for our unorthodox
- * entry into a pager call from a non-pager
- * context. Normally the pager code
- * assumes that an object it has been called
- * with has a backing pager and so does
- * not bother to check the pager field
- * before relying on the paging_offset
- */
- vm_object_lock(local_object);
- if (local_object->pager == 0) {
- local_object->paging_offset = 0;
- }
- vm_object_unlock(local_object);
- }
-
- memory_object_lock_request(
- local_object, ((offset - local_start)
- + local_offset) +
- local_object->paging_offset,
- (vm_object_size_t)*upl_size, FALSE,
- MEMORY_OBJECT_DATA_SYNC,
- VM_PROT_NO_CHANGE,
- NULL, 0);
- force_data_sync = FALSE;
- goto REDISCOVER_ENTRY;
- }
+/*
+ * mach_memory_entry_port_release:
+ *
+ * Release a send right on a named entry port. This is the correct
+ * way to destroy a named entry. When the last right on the port is
+ * released, ipc_kobject_destroy() will call mach_destroy_memory_entry().
+ */
+void
+mach_memory_entry_port_release(
+ ipc_port_t port)
+{
+ assert(ip_kotype(port) == IKOT_NAMED_ENTRY);
+ ipc_port_release_send(port);
+}
- if(!(entry->object.vm_object->private)) {
- if(*upl_size > (MAX_UPL_TRANSFER*PAGE_SIZE))
- *upl_size = (MAX_UPL_TRANSFER*PAGE_SIZE);
- if(entry->object.vm_object->phys_contiguous) {
- *flags = UPL_PHYS_CONTIG;
- } else {
- *flags = 0;
- }
+/*
+ * mach_destroy_memory_entry:
+ *
+ * Drops a reference on a memory entry and destroys the memory entry if
+ * there are no more references on it.
+ * NOTE: This routine should not be called to destroy a memory entry from the
+ * kernel, as it will not release the Mach port associated with the memory
+ * entry. The proper way to destroy a memory entry in the kernel is to
+ * call mach_memort_entry_port_release() to release the kernel's send-right on
+ * the memory entry's port. When the last send right is released, the memory
+ * entry will be destroyed via ipc_kobject_destroy().
+ */
+void
+mach_destroy_memory_entry(
+ ipc_port_t port)
+{
+ 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;
+
+ named_entry_lock(named_entry);
+ named_entry->ref_count -= 1;
+
+ 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) {
+ /* JMM - need to drop reference on pager in that case */
+ } else if (named_entry->is_copy) {
+ vm_map_copy_discard(named_entry->backing.copy);
} else {
- *flags = UPL_DEV_MEMORY | UPL_PHYS_CONTIG;
+ /* release the VM object we've been pointing to */
+ vm_object_deallocate(named_entry->backing.object);
}
- local_object = entry->object.vm_object;
- local_offset = entry->offset;
- local_start = entry->vme_start;
- vm_object_reference(local_object);
- vm_map_unlock(map);
- ret = (vm_fault_list_request(local_object,
- ((offset - local_start) + local_offset),
- *upl_size,
- upl,
- page_list,
- *count,
- caller_flags));
- vm_object_deallocate(local_object);
- return(ret);
- }
- vm_map_unlock(map);
- return(KERN_FAILURE);
+ named_entry_unlock(named_entry);
+ named_entry_lock_destroy(named_entry);
+ kfree((void *) port->ip_kobject,
+ 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
-vm_object_upl_request(
- vm_object_t object,
+mach_memory_entry_page_op(
+ ipc_port_t entry_port,
vm_object_offset_t offset,
- vm_size_t size,
- ipc_port_t *upl,
- upl_page_info_t *page_list,
- mach_msg_type_number_t *count,
- int cntrl_flags)
-{
- upl_t upl_object;
- ipc_port_t upl_port;
- ipc_port_t previous;
- upl_page_info_t *pl;
- kern_return_t kr;
-
- pl = page_list;
- kr = vm_fault_list_request(object, offset, size, &upl_object,
- &pl, *count, cntrl_flags);
+ int ops,
+ ppnum_t *phys_entry,
+ int *flags)
+{
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ kern_return_t kr;
-
- if(kr != KERN_SUCCESS) {
- *upl = MACH_PORT_NULL;
- return KERN_FAILURE;
+ if (entry_port == IP_NULL ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
+ return KERN_INVALID_ARGUMENT;
}
- upl_port = ipc_port_alloc_kernel();
-
-
- ip_lock(upl_port);
-
- /* make a sonce right */
- upl_port->ip_sorights++;
- ip_reference(upl_port);
-
- upl_port->ip_destination = IP_NULL;
- upl_port->ip_receiver_name = MACH_PORT_NULL;
- upl_port->ip_receiver = ipc_space_kernel;
-
- /* make a send right */
- upl_port->ip_mscount++;
- upl_port->ip_srights++;
- ip_reference(upl_port);
-
- ipc_port_nsrequest(upl_port, 1, upl_port, &previous);
- /* nsrequest unlocks user_handle */
-
- /* Create a named object based on a submap of specified size */
-
-
- ipc_kobject_set(upl_port, (ipc_kobject_t) upl_object, IKOT_UPL);
- *upl = upl_port;
- return KERN_SUCCESS;
-}
-
-kern_return_t
-vm_pager_upl_request(
- vm_object_t object,
- vm_object_offset_t offset,
- vm_size_t size,
- vm_size_t super_size,
- ipc_port_t *upl,
- upl_page_info_t *page_list,
- mach_msg_type_number_t *count,
- int cntrl_flags)
-{
- upl_t upl_object;
- ipc_port_t upl_port;
- ipc_port_t previous;
- upl_page_info_t *pl;
- kern_return_t kr;
+ mem_entry = (vm_named_entry_t) entry_port->ip_kobject;
- pl = page_list;
- kr = upl_system_list_request(object, offset, size, super_size,
- &upl_object, &pl, *count, cntrl_flags);
+ named_entry_lock(mem_entry);
- if(kr != KERN_SUCCESS) {
- *upl = MACH_PORT_NULL;
- return KERN_FAILURE;
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_pager ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
-
- upl_port = ipc_port_alloc_kernel();
-
-
- ip_lock(upl_port);
-
- /* make a sonce right */
- upl_port->ip_sorights++;
- ip_reference(upl_port);
-
- upl_port->ip_destination = IP_NULL;
- upl_port->ip_receiver_name = MACH_PORT_NULL;
- upl_port->ip_receiver = ipc_space_kernel;
-
- /* make a send right */
- upl_port->ip_mscount++;
- upl_port->ip_srights++;
- ip_reference(upl_port);
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
+ }
- ipc_port_nsrequest(upl_port, 1, upl_port, &previous);
- /* nsrequest unlocks user_handle */
+ vm_object_reference(object);
+ named_entry_unlock(mem_entry);
- /* Create a named object based on a submap of specified size */
+ kr = vm_object_page_op(object, offset, ops, phys_entry, flags);
+ vm_object_deallocate(object);
- ipc_kobject_set(upl_port, (ipc_kobject_t) upl_object, IKOT_UPL);
- *upl = upl_port;
- return KERN_SUCCESS;
+ 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
-vm_upl_map(
- vm_map_t map,
- ipc_port_t upl_port,
- vm_offset_t *dst_addr)
+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)
{
- upl_t upl;
- kern_return_t kr;
+ vm_named_entry_t mem_entry;
+ vm_object_t object;
+ kern_return_t kr;
- if (!IP_VALID(upl_port)) {
+ if (entry_port == IP_NULL ||
+ ip_kotype(entry_port) != IKOT_NAMED_ENTRY) {
return KERN_INVALID_ARGUMENT;
- } else if (ip_kotype(upl_port) == IKOT_UPL) {
- upl_lock(upl);
- upl = (upl_t)upl_port->ip_kobject;
- kr = uc_upl_map(map, upl, dst_addr);
- upl_unlock(upl);
- return kr;
- } else {
- return KERN_FAILURE;
}
-}
+ mem_entry = (vm_named_entry_t) entry_port->ip_kobject;
-kern_return_t
-vm_upl_unmap(
- vm_map_t map,
- ipc_port_t upl_port)
-{
- upl_t upl;
- kern_return_t kr;
+ named_entry_lock(mem_entry);
- if (!IP_VALID(upl_port)) {
+ if (mem_entry->is_sub_map ||
+ mem_entry->is_pager ||
+ mem_entry->is_copy) {
+ named_entry_unlock(mem_entry);
return KERN_INVALID_ARGUMENT;
- } else if (ip_kotype(upl_port) == IKOT_UPL) {
- upl_lock(upl);
- upl = (upl_t)upl_port->ip_kobject;
- kr = uc_upl_un_map(map, upl);
- upl_unlock(upl);
- return kr;
- } else {
- return KERN_FAILURE;
}
-}
-kern_return_t
-vm_upl_commit(
- upl_t upl,
- upl_page_list_ptr_t page_list,
- mach_msg_type_number_t count)
-{
- kern_return_t kr;
- upl_lock(upl);
- if(count) {
- kr = uc_upl_commit(upl, (upl_page_info_t *)page_list);
- } else {
- kr = uc_upl_commit(upl, (upl_page_info_t *) NULL);
+ object = mem_entry->backing.object;
+ if (object == VM_OBJECT_NULL) {
+ named_entry_unlock(mem_entry);
+ return KERN_INVALID_ARGUMENT;
}
- upl_unlock(upl);
- return kr;
-}
-kern_return_t
-vm_upl_commit_range(
- upl_t upl,
- vm_offset_t offset,
- vm_size_t size,
- upl_page_list_ptr_t page_list,
- int flags,
- mach_msg_type_number_t count)
-{
- kern_return_t kr;
- upl_lock(upl);
- if(count) {
- kr = uc_upl_commit_range(upl, offset, size, flags,
- (upl_page_info_t *)page_list);
- } else {
- kr = uc_upl_commit_range(upl, offset, size, flags,
- (upl_page_info_t *) NULL);
- }
- upl_unlock(upl);
+ 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;
}
-
+
+
kern_return_t
-vm_upl_abort_range(
- upl_t upl,
- vm_offset_t offset,
- vm_size_t size,
- int abort_flags)
+set_dp_control_port(
+ host_priv_t host_priv,
+ ipc_port_t control_port)
{
- kern_return_t kr;
- upl_lock(upl);
- kr = uc_upl_abort_range(upl, offset, size, abort_flags);
- upl_unlock(upl);
- return kr;
+ if (host_priv == HOST_PRIV_NULL)
+ return (KERN_INVALID_HOST);
+
+ if (IP_VALID(dynamic_pager_control_port))
+ ipc_port_release_send(dynamic_pager_control_port);
+
+ dynamic_pager_control_port = control_port;
+ return KERN_SUCCESS;
}
kern_return_t
-vm_upl_abort(
- upl_t upl,
- int abort_type)
+get_dp_control_port(
+ host_priv_t host_priv,
+ ipc_port_t *control_port)
{
- kern_return_t kr;
- upl_lock(upl);
- kr = uc_upl_abort(upl, abort_type);
- upl_unlock(upl);
- return kr;
+ if (host_priv == HOST_PRIV_NULL)
+ return (KERN_INVALID_HOST);
+
+ *control_port = ipc_port_copy_send(dynamic_pager_control_port);
+ return KERN_SUCCESS;
+
}
/* ******* Temporary Internal calls to UPL for BSD ***** */
+
+extern int kernel_upl_map(
+ vm_map_t map,
+ upl_t upl,
+ vm_offset_t *dst_addr);
+
+extern int kernel_upl_unmap(
+ vm_map_t map,
+ upl_t upl);
+
+extern int kernel_upl_commit(
+ upl_t upl,
+ upl_page_info_t *pl,
+ 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);
+
+extern int kernel_upl_abort(
+ upl_t upl,
+ int abort_type);
+
+extern int kernel_upl_abort_range(
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int abort_flags);
+
+
kern_return_t
kernel_upl_map(
vm_map_t map,
upl_t upl,
vm_offset_t *dst_addr)
{
- kern_return_t kr;
-
- upl_lock(upl);
- kr = uc_upl_map(map, upl, dst_addr);
- if(kr == KERN_SUCCESS) {
- upl->ref_count += 1;
- }
- upl_unlock(upl);
- return kr;
+ return vm_upl_map(map, upl, dst_addr);
}
kern_return_t
kernel_upl_unmap(
vm_map_t map,
- upl_t upl)
+ upl_t upl)
{
- kern_return_t kr;
-
- upl_lock(upl);
- kr = uc_upl_un_map(map, upl);
- if(kr == KERN_SUCCESS) {
- if(upl->ref_count == 1) {
- upl_dealloc(upl);
- } else {
- upl->ref_count -= 1;
- upl_unlock(upl);
- }
- } else {
- upl_unlock(upl);
- }
- return kr;
+ return vm_upl_unmap(map, upl);
}
kern_return_t
kernel_upl_commit(
- upl_t upl,
- upl_page_list_ptr_t page_list,
- mach_msg_type_number_t count)
+ upl_t upl,
+ upl_page_info_t *pl,
+ mach_msg_type_number_t count)
{
- kern_return_t kr;
- upl_lock(upl);
- upl->ref_count += 1;
- if(count) {
- kr = uc_upl_commit(upl, (upl_page_info_t *)page_list);
- } else {
- kr = uc_upl_commit(upl, (upl_page_info_t *) NULL);
- }
- if(upl->ref_count == 1) {
- upl_dealloc(upl);
- } else {
- upl->ref_count -= 1;
- upl_unlock(upl);
- }
+ kern_return_t kr;
+
+ kr = upl_commit(upl, pl, count);
+ upl_deallocate(upl);
return kr;
}
+
kern_return_t
kernel_upl_commit_range(
upl_t upl,
- vm_offset_t offset,
- vm_size_t size,
+ upl_offset_t offset,
+ upl_size_t size,
int flags,
- upl_page_list_ptr_t page_list,
- mach_msg_type_number_t count)
+ upl_page_info_array_t pl,
+ mach_msg_type_number_t count)
{
- kern_return_t kr;
- upl_lock(upl);
- upl->ref_count += 1;
- if(count) {
- kr = uc_upl_commit_range(upl, offset, size, flags,
- (upl_page_info_t *)page_list);
- } else {
- kr = uc_upl_commit_range(upl, offset, size, flags,
- (upl_page_info_t *) NULL);
- }
- if(upl->ref_count == 1) {
- upl_dealloc(upl);
- } else {
- upl->ref_count -= 1;
- upl_unlock(upl);
+ boolean_t finished = FALSE;
+ kern_return_t kr;
+
+ 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)
+ upl_deallocate(upl);
+
return kr;
}
kern_return_t
kernel_upl_abort_range(
- upl_t upl,
- vm_offset_t offset,
- vm_size_t size,
- int abort_flags)
-{
- kern_return_t kr;
- upl_lock(upl);
- upl->ref_count += 1;
- kr = uc_upl_abort_range(upl, offset, size, abort_flags);
- if(upl->ref_count == 1) {
- upl_dealloc(upl);
- } else {
- upl->ref_count -= 1;
- upl_unlock(upl);
- }
- return kr;
-}
-
-kern_return_t
-kernel_upl_abort(
- upl_t upl,
- int abort_type)
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int abort_flags)
{
- kern_return_t kr;
- upl_lock(upl);
- upl->ref_count += 1;
- kr = uc_upl_abort(upl, abort_type);
- if(upl->ref_count == 1) {
- upl_dealloc(upl);
- } else {
- upl->ref_count -= 1;
- upl_unlock(upl);
- }
- return kr;
-}
+ kern_return_t kr;
+ boolean_t finished = FALSE;
+ if (abort_flags & UPL_COMMIT_FREE_ON_EMPTY)
+ abort_flags |= UPL_COMMIT_NOTIFY_EMPTY;
+ kr = upl_abort_range(upl, offset, size, abort_flags, &finished);
-/* code snippet from vm_map */
-kern_return_t
-vm_object_create_nomap(ipc_port_t port, vm_object_size_t size)
-{
- vm_object_t object_ptr;
- return memory_object_create_named(port, size, &object_ptr);
-}
-
-
-/*
- * Temporary interface to overcome old style ipc artifacts, and allow
- * ubc to call this routine directly. Will disappear with new RPC
- * component architecture.
- * NOTE: call to memory_object_destroy removes the vm_object's association
- * with its abstract memory object and hence the named flag is set to false.
- */
-kern_return_t
-memory_object_destroy_named(
- vm_object_t object,
- kern_return_t reason)
-{
- vm_object_lock(object);
- if(object->named == FALSE) {
- panic("memory_object_destroy_named called by party which doesn't hold right");
- }
- object->ref_count++;
- vm_object_res_reference(object);
- vm_object_unlock(object);
- return (memory_object_destroy(object, reason));
-}
+ if ((abort_flags & UPL_COMMIT_FREE_ON_EMPTY) && finished)
+ upl_deallocate(upl);
-/*
- * Temporary interface to overcome old style ipc artifacts, and allow
- * ubc to call this routine directly. Will disappear with new RPC
- * component architecture.
- * Note: No change is made in the named flag.
- */
-kern_return_t
-memory_object_lock_request_named(
- vm_object_t object,
- vm_object_offset_t offset,
- vm_object_size_t size,
- memory_object_return_t should_return,
- boolean_t should_flush,
- vm_prot_t prot,
- ipc_port_t reply_to)
-{
- vm_object_lock(object);
- if(object->named == FALSE) {
- panic("memory_object_lock_request_named called by party which doesn't hold right");
- }
- object->ref_count++;
- vm_object_res_reference(object);
- vm_object_unlock(object);
- return (memory_object_lock_request(object,
- offset, size, should_return, should_flush, prot,
- reply_to, 0));
+ return kr;
}
kern_return_t
-memory_object_change_attributes_named(
- vm_object_t object,
- memory_object_flavor_t flavor,
- memory_object_info_t attributes,
- mach_msg_type_number_t count,
- ipc_port_t reply_to,
- mach_msg_type_name_t reply_to_type)
+kernel_upl_abort(
+ upl_t upl,
+ int abort_type)
{
- vm_object_lock(object);
- if(object->named == FALSE) {
- panic("memory_object_lock_request_named called by party which doesn't hold right");
- }
- object->ref_count++;
- vm_object_res_reference(object);
- vm_object_unlock(object);
- return (memory_object_change_attributes(object,
- flavor, attributes, count, reply_to, reply_to_type));
-}
+ kern_return_t kr;
-kern_return_t
-vm_get_shared_region(
- task_t task,
- shared_region_mapping_t *shared_region)
-{
- *shared_region = (shared_region_mapping_t) task->system_shared_region;
- return KERN_SUCCESS;
+ kr = upl_abort(upl, abort_type);
+ upl_deallocate(upl);
+ return kr;
}
-kern_return_t
-vm_set_shared_region(
- task_t task,
- shared_region_mapping_t shared_region)
-{
- task->system_shared_region = (vm_offset_t) shared_region;
- return KERN_SUCCESS;
-}
+/*
+ * Now a kernel-private interface (for BootCache
+ * use only). Need a cleaner way to create an
+ * empty vm_map() and return a handle to it.
+ */
kern_return_t
-shared_region_mapping_info(
- shared_region_mapping_t shared_region,
- ipc_port_t *text_region,
- vm_size_t *text_size,
- ipc_port_t *data_region,
- vm_size_t *data_size,
- vm_offset_t *region_mappings,
- vm_offset_t *client_base,
- vm_offset_t *alt_base,
- vm_offset_t *alt_next,
- int *flags,
- shared_region_mapping_t *next)
+vm_region_object_create(
+ __unused vm_map_t target_map,
+ vm_size_t size,
+ ipc_port_t *object_handle)
{
- shared_region_mapping_lock(shared_region);
-
- *text_region = shared_region->text_region;
- *text_size = shared_region->text_size;
- *data_region = shared_region->data_region;
- *data_size = shared_region->data_size;
- *region_mappings = shared_region->region_mappings;
- *client_base = shared_region->client_base;
- *alt_base = shared_region->alternate_base;
- *alt_next = shared_region->alternate_next;
- *flags = shared_region->flags;
- *next = shared_region->next;
-
- shared_region_mapping_unlock(shared_region);
-}
+ vm_named_entry_t user_entry;
+ ipc_port_t user_handle;
-kern_return_t
-shared_region_object_chain_attach(
- shared_region_mapping_t target_region,
- shared_region_mapping_t object_chain_region)
-{
- shared_region_object_chain_t object_ele;
+ vm_map_t new_map;
- if(target_region->object_chain)
- return KERN_FAILURE;
- object_ele = (shared_region_object_chain_t)
- kalloc(sizeof (struct shared_region_object_chain));
- shared_region_mapping_lock(object_chain_region);
- target_region->object_chain = object_ele;
- object_ele->object_chain_region = object_chain_region;
- object_ele->next = object_chain_region->object_chain;
- object_ele->depth = object_chain_region->depth;
- object_chain_region->depth++;
- target_region->alternate_next = object_chain_region->alternate_next;
- shared_region_mapping_unlock(object_chain_region);
- return KERN_SUCCESS;
-}
-
-kern_return_t
-shared_region_mapping_create(
- ipc_port_t text_region,
- vm_size_t text_size,
- ipc_port_t data_region,
- vm_size_t data_size,
- vm_offset_t region_mappings,
- vm_offset_t client_base,
- shared_region_mapping_t *shared_region,
- vm_offset_t alt_base,
- vm_offset_t alt_next)
-{
- *shared_region = (shared_region_mapping_t)
- kalloc(sizeof (struct shared_region_mapping));
- if(*shared_region == NULL)
+ if (mach_memory_entry_allocate(&user_entry, &user_handle)
+ != KERN_SUCCESS) {
return KERN_FAILURE;
- shared_region_mapping_lock_init((*shared_region));
- (*shared_region)->text_region = text_region;
- (*shared_region)->text_size = text_size;
- (*shared_region)->data_region = data_region;
- (*shared_region)->data_size = data_size;
- (*shared_region)->region_mappings = region_mappings;
- (*shared_region)->client_base = client_base;
- (*shared_region)->ref_count = 1;
- (*shared_region)->next = NULL;
- (*shared_region)->object_chain = NULL;
- (*shared_region)->self = *shared_region;
- (*shared_region)->flags = 0;
- (*shared_region)->depth = 0;
- (*shared_region)->alternate_base = alt_base;
- (*shared_region)->alternate_next = alt_next;
- return KERN_SUCCESS;
-}
+ }
-kern_return_t
-shared_region_mapping_set_alt_next(
- shared_region_mapping_t shared_region,
- vm_offset_t alt_next)
-{
- shared_region->alternate_next = alt_next;
- return KERN_SUCCESS;
-}
+ /* Create a named object based on a submap of specified size */
-kern_return_t
-shared_region_mapping_ref(
- shared_region_mapping_t shared_region)
-{
- if(shared_region == NULL)
- return KERN_SUCCESS;
- shared_region_mapping_lock(shared_region);
- shared_region->ref_count++;
- shared_region_mapping_unlock(shared_region);
- return KERN_SUCCESS;
-}
+ new_map = vm_map_create(PMAP_NULL, VM_MAP_MIN_ADDRESS,
+ 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));
-kern_return_t
-shared_region_mapping_dealloc(
- shared_region_mapping_t shared_region)
-{
- struct shared_region_task_mappings sm_info;
- shared_region_mapping_t next;
+ user_entry->backing.map = new_map;
+ user_entry->internal = TRUE;
+ user_entry->is_sub_map = TRUE;
+ user_entry->offset = 0;
+ user_entry->protection = VM_PROT_ALL;
+ user_entry->size = size;
+ assert(user_entry->ref_count == 1);
- if(shared_region == NULL)
- return KERN_SUCCESS;
- shared_region_mapping_lock(shared_region);
-
- if((--shared_region->ref_count) == 0) {
-
- sm_info.text_region = shared_region->text_region;
- sm_info.text_size = shared_region->text_size;
- sm_info.data_region = shared_region->data_region;
- sm_info.data_size = shared_region->data_size;
- sm_info.region_mappings = shared_region->region_mappings;
- sm_info.client_base = shared_region->client_base;
- sm_info.alternate_base = shared_region->alternate_base;
- sm_info.alternate_next = shared_region->alternate_next;
- sm_info.flags = shared_region->flags;
- sm_info.self = (vm_offset_t)shared_region;
-
- lsf_remove_regions_mappings(shared_region, &sm_info);
- pmap_remove(((vm_named_entry_t)
- (shared_region->text_region->ip_kobject))
- ->backing.map->pmap,
- sm_info.client_base,
- sm_info.client_base + sm_info.text_size);
- ipc_port_release_send(shared_region->text_region);
- ipc_port_release_send(shared_region->data_region);
- if(shared_region->object_chain) {
- shared_region_mapping_dealloc(
- shared_region->object_chain->object_chain_region);
- kfree((vm_offset_t)shared_region->object_chain,
- sizeof (struct shared_region_object_chain));
- }
- kfree((vm_offset_t)shared_region,
- sizeof (struct shared_region_mapping));
- return KERN_SUCCESS;
- }
- shared_region_mapping_unlock(shared_region);
+ *object_handle = user_handle;
return KERN_SUCCESS;
+
}
-vm_offset_t
-vm_map_get_phys_page(
+ppnum_t vm_map_get_phys_page( /* forward */
vm_map_t map,
- vm_offset_t offset)
+ vm_offset_t offset);
+
+ppnum_t
+vm_map_get_phys_page(
+ vm_map_t map,
+ vm_offset_t addr)
{
- vm_map_entry_t entry;
- int ops;
- int flags;
- vm_offset_t phys_addr = 0;
- vm_object_t object;
+ 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, PAGE_MASK);
vm_map_lock(map);
- while (vm_map_lookup_entry(map, offset, &entry)) {
+ while (vm_map_lookup_entry(map, map_offset, &entry)) {
if (entry->object.vm_object == VM_OBJECT_NULL) {
vm_map_unlock(map);
- return (vm_offset_t) 0;
+ return (ppnum_t) 0;
}
if (entry->is_sub_map) {
vm_map_t old_map;
vm_map_lock(entry->object.sub_map);
old_map = map;
map = entry->object.sub_map;
- offset = entry->offset + (offset - entry->vme_start);
+ map_offset = entry->offset + (map_offset - entry->vme_start);
vm_map_unlock(old_map);
continue;
}
- offset = entry->offset + (offset - entry->vme_start);
+ if (entry->object.vm_object->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->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_map_lock(map);
+ continue;
+ }
+ offset = entry->offset + (map_offset - entry->vme_start);
+ phys_page = (ppnum_t)
+ ((entry->object.vm_object->vo_shadow_offset
+ + offset) >> PAGE_SHIFT);
+ break;
+
+ }
+ offset = entry->offset + (map_offset - entry->vme_start);
object = entry->object.vm_object;
vm_object_lock(object);
while (TRUE) {
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_addr = dst_page->phys_addr;
+ phys_page = (ppnum_t)(dst_page->phys_page);
vm_object_unlock(object);
break;
}
}
vm_map_unlock(map);
- return phys_addr;
+ return phys_page;
+}
+
+
+
+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,
+ 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;
+
+ int caller_flags;
+
+ caller_flags = *flags;
+
+ if (caller_flags & ~UPL_VALID_FLAGS) {
+ /*
+ * For forward compatibility's sake,
+ * reject any unknown flag.
+ */
+ return KERN_INVALID_VALUE;
+ }
+
+ /* 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 = (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);
+ }
+ } else {
+ 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);
+
+ /* 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 ||
+ named_entry->is_copy)
+ 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);
+
+ /* 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);
+
+ } 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);
+ }
+
+ if (!object->private) {
+ if (*upl_size > MAX_UPL_TRANSFER_BYTES)
+ *upl_size = MAX_UPL_TRANSFER_BYTES;
+ if (object->phys_contiguous) {
+ *flags = UPL_PHYS_CONTIG;
+ } else {
+ *flags = 0;
+ }
+ } else {
+ *flags = UPL_DEV_MEMORY | UPL_PHYS_CONTIG;
+ }
+
+ ret = vm_object_iopl_request(object,
+ offset,
+ *upl_size,
+ upl_ptr,
+ user_page_list,
+ page_list_count,
+ caller_flags);
+ vm_object_deallocate(object);
+ return ret;
}
-#endif /* VM_CPM */
projects / apple / xnu.git / blobdiff