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/*
* Mach Operating System
* Copyright (c) 1991 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Package to wire current task's memory.
*/
#include <mach.h>
#include <mach_init.h>
#include <mach/machine/vm_param.h>
mach_port_t this_task; /* our task */
mach_port_t priv_host_port = MACH_PORT_NULL;
/* the privileged host port */
void
wire_setup(host_priv)
mach_port_t host_priv;
{
priv_host_port = host_priv;
this_task = mach_task_self();
}
void
wire_memory(start, size, prot)
vm_address_t start;
vm_size_t size;
vm_prot_t prot;
{
kern_return_t kr;
if (priv_host_port == MACH_PORT_NULL)
return;
kr = vm_wire(priv_host_port,
this_task,
start, size, prot);
if (kr != KERN_SUCCESS)
panic("mem_wire: %d", kr);
}
void
wire_thread()
{
kern_return_t kr;
if (priv_host_port == MACH_PORT_NULL)
return;
kr = thread_wire(priv_host_port,
mach_thread_self(),
TRUE);
if (kr != KERN_SUCCESS)
panic("wire_thread: %d", kr);
}
void
wire_all_memory()
{
register kern_return_t kr;
vm_offset_t address;
vm_size_t size;
vm_prot_t protection;
vm_prot_t max_protection;
vm_inherit_t inheritance;
boolean_t is_shared;
memory_object_name_t object;
vm_offset_t offset;
if (priv_host_port == MACH_PORT_NULL)
return;
/* iterate thru all regions, wiring */
address = 0;
while (
(kr = vm_region(this_task, &address,
&size,
&protection,
&max_protection,
&inheritance,
&is_shared,
&object,
&offset))
== KERN_SUCCESS)
{
if (MACH_PORT_VALID(object))
(void) mach_port_deallocate(this_task, object);
if (protection != VM_PROT_NONE)
wire_memory(address, size, protection);
address += size;
}
}
/*
* Alias for vm_allocate to return wired memory.
*/
kern_return_t
vm_allocate(task, address, size, anywhere)
task_t task;
vm_address_t *address;
vm_size_t size;
boolean_t anywhere;
{
kern_return_t kr;
if (anywhere)
*address = VM_MIN_ADDRESS;
kr = vm_map(task,
address, size, (vm_offset_t) 0, anywhere,
MEMORY_OBJECT_NULL, (vm_offset_t)0, FALSE,
VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS)
return kr;
if (task == this_task)
(void) vm_wire(priv_host_port, task, *address, size,
VM_PROT_DEFAULT);
return KERN_SUCCESS;
}
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