/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* 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@
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
+/*
+ * NOTICE: This file was modified by McAfee Research in 2004 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
/*
*/
#include <mach/mach_types.h>
#include <mach/boolean.h>
-#include <mach_rt.h>
#include <mach/kern_return.h>
#include <mach/mach_param.h>
#include <mach/task_special_ports.h>
#include <mach/thread_special_ports.h>
#include <mach/thread_status.h>
#include <mach/exception_types.h>
+#include <mach/memory_object_types.h>
#include <mach/mach_traps.h>
#include <mach/task_server.h>
#include <mach/thread_act_server.h>
#include <mach/mach_host_server.h>
+#include <mach/host_priv_server.h>
#include <mach/vm_map_server.h>
+
+#include <kern/kern_types.h>
#include <kern/host.h>
+#include <kern/ipc_kobject.h>
#include <kern/ipc_tt.h>
-#include <kern/thread_act.h>
+#include <kern/kalloc.h>
+#include <kern/thread.h>
#include <kern/misc_protos.h>
+
+#include <vm/vm_map.h>
#include <vm/vm_pageout.h>
+#include <vm/vm_protos.h>
+
+#include <security/mac_mach_internal.h>
+
+/* forward declarations */
+task_t convert_port_to_locked_task(ipc_port_t port);
+
/*
* Routine: ipc_task_init
{
ipc_space_t space;
ipc_port_t kport;
+ ipc_port_t nport;
kern_return_t kr;
int i;
if (kr != KERN_SUCCESS)
panic("ipc_task_init");
+ space->is_task = task;
kport = ipc_port_alloc_kernel();
if (kport == IP_NULL)
panic("ipc_task_init");
+ nport = ipc_port_alloc_kernel();
+ if (nport == IP_NULL)
+ panic("ipc_task_init");
+
itk_lock_init(task);
task->itk_self = kport;
+ task->itk_nself = nport;
+ task->itk_resume = IP_NULL; /* Lazily allocated on-demand */
task->itk_sself = ipc_port_make_send(kport);
+ task->itk_debug_control = IP_NULL;
task->itk_space = space;
- space->is_fast = task->kernel_loaded;
if (parent == TASK_NULL) {
+ ipc_port_t port;
+
for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
task->exc_actions[i].port = IP_NULL;
}/* for */
- task->itk_host = ipc_port_make_send(realhost.host_self);
+
+ kr = host_get_host_port(host_priv_self(), &port);
+ assert(kr == KERN_SUCCESS);
+ task->itk_host = port;
+
task->itk_bootstrap = IP_NULL;
+ task->itk_seatbelt = IP_NULL;
+ task->itk_gssd = IP_NULL;
+ task->itk_task_access = IP_NULL;
+
for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
task->itk_registered[i] = IP_NULL;
} else {
parent->exc_actions[i].flavor;
task->exc_actions[i].behavior =
parent->exc_actions[i].behavior;
+ task->exc_actions[i].privileged =
+ parent->exc_actions[i].privileged;
}/* for */
task->itk_host =
ipc_port_copy_send(parent->itk_host);
task->itk_bootstrap =
ipc_port_copy_send(parent->itk_bootstrap);
+ task->itk_seatbelt =
+ ipc_port_copy_send(parent->itk_seatbelt);
+
+ task->itk_gssd =
+ ipc_port_copy_send(parent->itk_gssd);
+
+ task->itk_task_access =
+ ipc_port_copy_send(parent->itk_task_access);
+
itk_unlock(parent);
}
}
task_t task)
{
ipc_port_t kport;
+ ipc_port_t nport;
itk_lock(task);
kport = task->itk_self;
if (kport != IP_NULL)
ipc_kobject_set(kport, (ipc_kobject_t) task, IKOT_TASK);
+ nport = task->itk_nself;
+ if (nport != IP_NULL)
+ ipc_kobject_set(nport, (ipc_kobject_t) task, IKOT_TASK_NAME);
itk_unlock(task);
}
task_t task)
{
ipc_port_t kport;
+ ipc_port_t nport;
+ ipc_port_t rport;
itk_lock(task);
kport = task->itk_self;
if (kport != IP_NULL)
ipc_kobject_set(kport, IKO_NULL, IKOT_NONE);
+ nport = task->itk_nself;
+ if (nport != IP_NULL)
+ ipc_kobject_set(nport, IKO_NULL, IKOT_NONE);
+
+ rport = task->itk_resume;
+ if (rport != IP_NULL) {
+ /*
+ * From this point onwards this task is no longer accepting
+ * resumptions.
+ *
+ * There are still outstanding suspensions on this task,
+ * even as it is being torn down. Disconnect the task
+ * from the rport, thereby "orphaning" the rport. The rport
+ * itself will go away only when the last suspension holder
+ * destroys his SO right to it -- when he either
+ * exits, or tries to actually use that last SO right to
+ * resume this (now non-existent) task.
+ */
+ ipc_kobject_set(rport, IKO_NULL, IKOT_NONE);
+ }
itk_unlock(task);
}
task_t task)
{
ipc_port_t kport;
+ ipc_port_t nport;
+ ipc_port_t rport;
int i;
itk_lock(task);
itk_unlock(task);
return;
}
-
task->itk_self = IP_NULL;
+
+ nport = task->itk_nself;
+ assert(nport != IP_NULL);
+ task->itk_nself = IP_NULL;
+
+ rport = task->itk_resume;
+ task->itk_resume = IP_NULL;
+
itk_unlock(task);
/* release the naked send rights */
if (IP_VALID(task->exc_actions[i].port)) {
ipc_port_release_send(task->exc_actions[i].port);
}
- }/* for */
+ }
+
if (IP_VALID(task->itk_host))
ipc_port_release_send(task->itk_host);
if (IP_VALID(task->itk_bootstrap))
ipc_port_release_send(task->itk_bootstrap);
+ if (IP_VALID(task->itk_seatbelt))
+ ipc_port_release_send(task->itk_seatbelt);
+
+ if (IP_VALID(task->itk_gssd))
+ ipc_port_release_send(task->itk_gssd);
+
+ if (IP_VALID(task->itk_task_access))
+ ipc_port_release_send(task->itk_task_access);
+
+ if (IP_VALID(task->itk_debug_control))
+ ipc_port_release_send(task->itk_debug_control);
+
for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
if (IP_VALID(task->itk_registered[i]))
ipc_port_release_send(task->itk_registered[i]);
- ipc_port_release_send(task->wired_ledger_port);
- ipc_port_release_send(task->paged_ledger_port);
+ /* destroy the kernel ports */
+ ipc_port_dealloc_kernel(kport);
+ ipc_port_dealloc_kernel(nport);
+ if (rport != IP_NULL)
+ ipc_port_dealloc_kernel(rport);
+
+ itk_lock_destroy(task);
+}
+
+/*
+ * Routine: ipc_task_reset
+ * Purpose:
+ * Reset a task's IPC state to protect it when
+ * it enters an elevated security context. The
+ * task name port can remain the same - since
+ * it represents no specific privilege.
+ * Conditions:
+ * Nothing locked. The task must be suspended.
+ * (Or the current thread must be in the task.)
+ */
+
+void
+ipc_task_reset(
+ task_t task)
+{
+ ipc_port_t old_kport, new_kport;
+ ipc_port_t old_sself;
+ ipc_port_t old_exc_actions[EXC_TYPES_COUNT];
+ int i;
+
+ new_kport = ipc_port_alloc_kernel();
+ if (new_kport == IP_NULL)
+ panic("ipc_task_reset");
+
+ itk_lock(task);
+
+ old_kport = task->itk_self;
+
+ if (old_kport == IP_NULL) {
+ /* the task is already terminated (can this happen?) */
+ itk_unlock(task);
+ ipc_port_dealloc_kernel(new_kport);
+ return;
+ }
+
+ task->itk_self = new_kport;
+ old_sself = task->itk_sself;
+ task->itk_sself = ipc_port_make_send(new_kport);
+ ipc_kobject_set(old_kport, IKO_NULL, IKOT_NONE);
+ ipc_kobject_set(new_kport, (ipc_kobject_t) task, IKOT_TASK);
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (!task->exc_actions[i].privileged) {
+ old_exc_actions[i] = task->exc_actions[i].port;
+ task->exc_actions[i].port = IP_NULL;
+ } else {
+ old_exc_actions[i] = IP_NULL;
+ }
+ }/* for */
+
+ if (IP_VALID(task->itk_debug_control)) {
+ ipc_port_release_send(task->itk_debug_control);
+ }
+ task->itk_debug_control = IP_NULL;
+
+ itk_unlock(task);
+
+ /* release the naked send rights */
+
+ if (IP_VALID(old_sself))
+ ipc_port_release_send(old_sself);
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (IP_VALID(old_exc_actions[i])) {
+ ipc_port_release_send(old_exc_actions[i]);
+ }
+ }/* for */
/* destroy the kernel port */
- ipc_port_dealloc_kernel(kport);
+ ipc_port_dealloc_kernel(old_kport);
}
/*
ipc_thread_init(
thread_t thread)
{
+ ipc_port_t kport;
+
+ kport = ipc_port_alloc_kernel();
+ if (kport == IP_NULL)
+ panic("ipc_thread_init");
+
+ thread->ith_self = kport;
+ thread->ith_sself = ipc_port_make_send(kport);
+ thread->exc_actions = NULL;
+
+ ipc_kobject_set(kport, (ipc_kobject_t)thread, IKOT_THREAD);
+
+#if IMPORTANCE_INHERITANCE
+ thread->ith_assertions = 0;
+#endif
+
ipc_kmsg_queue_init(&thread->ith_messages);
- thread->ith_mig_reply = MACH_PORT_NULL;
+
thread->ith_rpc_reply = IP_NULL;
}
+void
+ipc_thread_init_exc_actions(
+ thread_t thread)
+{
+ assert(thread->exc_actions == NULL);
+
+ thread->exc_actions = kalloc(sizeof(struct exception_action) * EXC_TYPES_COUNT);
+ bzero(thread->exc_actions, sizeof(struct exception_action) * EXC_TYPES_COUNT);
+}
+
+void
+ipc_thread_destroy_exc_actions(
+ thread_t thread)
+{
+ if (thread->exc_actions != NULL) {
+ kfree(thread->exc_actions,
+ sizeof(struct exception_action) * EXC_TYPES_COUNT);
+ thread->exc_actions = NULL;
+ }
+}
+
+void
+ipc_thread_disable(
+ thread_t thread)
+{
+ ipc_port_t kport = thread->ith_self;
+
+ if (kport != IP_NULL)
+ ipc_kobject_set(kport, IKO_NULL, IKOT_NONE);
+}
+
/*
* Routine: ipc_thread_terminate
* Purpose:
* Clean up and destroy a thread's IPC state.
* Conditions:
- * Nothing locked. The thread must be suspended.
- * (Or be the current thread.)
+ * Nothing locked.
*/
void
ipc_thread_terminate(
thread_t thread)
{
+ ipc_port_t kport = thread->ith_self;
+
+ if (kport != IP_NULL) {
+ int i;
+
+ if (IP_VALID(thread->ith_sself))
+ ipc_port_release_send(thread->ith_sself);
+
+ thread->ith_sself = thread->ith_self = IP_NULL;
+
+ if (thread->exc_actions != NULL) {
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i) {
+ if (IP_VALID(thread->exc_actions[i].port))
+ ipc_port_release_send(thread->exc_actions[i].port);
+ }
+ ipc_thread_destroy_exc_actions(thread);
+ }
+
+ ipc_port_dealloc_kernel(kport);
+ }
+
+#if IMPORTANCE_INHERITANCE
+ assert(thread->ith_assertions == 0);
+#endif
+
assert(ipc_kmsg_queue_empty(&thread->ith_messages));
- if (thread->ith_rpc_reply != IP_NULL)
- ipc_port_dealloc_reply(thread->ith_rpc_reply);
+ if (thread->ith_rpc_reply != IP_NULL)
+ ipc_port_dealloc_reply(thread->ith_rpc_reply);
+
thread->ith_rpc_reply = IP_NULL;
}
/*
- * Routine: ipc_thr_act_init
+ * Routine: ipc_thread_reset
* Purpose:
- * Initialize an thr_act's IPC state.
+ * Reset the IPC state for a given Mach thread when
+ * its task enters an elevated security context.
+ * Both the thread port and its exception ports have
+ * to be reset. Its RPC reply port cannot have any
+ * rights outstanding, so it should be fine.
* Conditions:
* Nothing locked.
*/
void
-ipc_thr_act_init(task_t task, thread_act_t thr_act)
+ipc_thread_reset(
+ thread_t thread)
{
- ipc_port_t kport; int i;
-
- kport = ipc_port_alloc_kernel();
- if (kport == IP_NULL)
- panic("ipc_thr_act_init");
-
- thr_act->ith_self = kport;
- thr_act->ith_sself = ipc_port_make_send(kport);
+ ipc_port_t old_kport, new_kport;
+ ipc_port_t old_sself;
+ ipc_port_t old_exc_actions[EXC_TYPES_COUNT];
+ boolean_t has_old_exc_actions = FALSE;
+ int i;
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
- thr_act->exc_actions[i].port = IP_NULL;
+ new_kport = ipc_port_alloc_kernel();
+ if (new_kport == IP_NULL)
+ panic("ipc_task_reset");
- ipc_kobject_set(kport, (ipc_kobject_t) thr_act, IKOT_ACT);
-}
-
-void
-ipc_thr_act_disable(thread_act_t thr_act)
-{
- int i;
- ipc_port_t kport;
+ thread_mtx_lock(thread);
- kport = thr_act->ith_self;
-
- if (kport != IP_NULL)
- ipc_kobject_set(kport, IKO_NULL, IKOT_NONE);
-}
+ old_kport = thread->ith_self;
-void
-ipc_thr_act_terminate(thread_act_t thr_act)
-{
- ipc_port_t kport; int i;
+ if (old_kport == IP_NULL) {
+ /* the is already terminated (can this happen?) */
+ thread_mtx_unlock(thread);
+ ipc_port_dealloc_kernel(new_kport);
+ return;
+ }
- kport = thr_act->ith_self;
+ thread->ith_self = new_kport;
+ old_sself = thread->ith_sself;
+ thread->ith_sself = ipc_port_make_send(new_kport);
+ ipc_kobject_set(old_kport, IKO_NULL, IKOT_NONE);
+ ipc_kobject_set(new_kport, (ipc_kobject_t) thread, IKOT_THREAD);
- if (kport == IP_NULL) {
- /* the thread is already terminated (can this happen?) */
- return;
+ /*
+ * Only ports that were set by root-owned processes
+ * (privileged ports) should survive
+ */
+ if (thread->exc_actions != NULL) {
+ has_old_exc_actions = TRUE;
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (thread->exc_actions[i].privileged) {
+ old_exc_actions[i] = IP_NULL;
+ } else {
+ old_exc_actions[i] = thread->exc_actions[i].port;
+ thread->exc_actions[i].port = IP_NULL;
+ }
+ }
}
- thr_act->ith_self = IP_NULL;
+ thread_mtx_unlock(thread);
/* release the naked send rights */
- if (IP_VALID(thr_act->ith_sself))
- ipc_port_release_send(thr_act->ith_sself);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
- if (IP_VALID(thr_act->exc_actions[i].port))
- ipc_port_release_send(thr_act->exc_actions[i].port);
- }
+ if (IP_VALID(old_sself))
+ ipc_port_release_send(old_sself);
+
+ if (has_old_exc_actions) {
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ ipc_port_release_send(old_exc_actions[i]);
+ }
+ }
/* destroy the kernel port */
- ipc_port_dealloc_kernel(kport);
+ ipc_port_dealloc_kernel(old_kport);
}
/*
}
/*
- * Routine: retrieve_act_self_fast
+ * Routine: retrieve_thread_self_fast
* Purpose:
- * Optimized version of retrieve_thread_self,
- * that only works for the current thread.
- *
* Return a send right (possibly null/dead)
* for the thread's user-visible self port.
+ *
+ * Only works for the current thread.
+ *
* Conditions:
* Nothing locked.
*/
ipc_port_t
-retrieve_act_self_fast(thread_act_t thr_act)
+retrieve_thread_self_fast(
+ thread_t thread)
{
register ipc_port_t port;
- assert(thr_act == current_act());
- act_lock(thr_act);
- assert(thr_act->ith_self != IP_NULL);
+ assert(thread == current_thread());
+
+ thread_mtx_lock(thread);
+
+ assert(thread->ith_self != IP_NULL);
- if ((port = thr_act->ith_sself) == thr_act->ith_self) {
+ if ((port = thread->ith_sself) == thread->ith_self) {
/* no interposing */
ip_lock(port);
ip_reference(port);
port->ip_srights++;
ip_unlock(port);
- } else
+ }
+ else
port = ipc_port_copy_send(port);
- act_unlock(thr_act);
+
+ thread_mtx_unlock(thread);
return port;
}
*/
mach_port_name_t
-task_self_trap(void)
+task_self_trap(
+ __unused struct task_self_trap_args *args)
{
task_t task = current_task();
ipc_port_t sright;
+ mach_port_name_t name;
sright = retrieve_task_self_fast(task);
- return ipc_port_copyout_send(sright, task->itk_space);
+ name = ipc_port_copyout_send(sright, task->itk_space);
+ return name;
}
/*
*/
mach_port_name_t
-thread_self_trap(void)
+thread_self_trap(
+ __unused struct thread_self_trap_args *args)
{
- thread_act_t thr_act = current_act();
- task_t task = thr_act->task;
+ thread_t thread = current_thread();
+ task_t task = thread->task;
ipc_port_t sright;
+ mach_port_name_t name;
+
+ sright = retrieve_thread_self_fast(thread);
+ name = ipc_port_copyout_send(sright, task->itk_space);
+ return name;
- sright = retrieve_act_self_fast(thr_act);
- return ipc_port_copyout_send(sright, task->itk_space);
}
/*
*/
mach_port_name_t
-mach_reply_port(void)
+mach_reply_port(
+ __unused struct mach_reply_port_args *args)
{
ipc_port_t port;
mach_port_name_t name;
ip_unlock(port);
else
name = MACH_PORT_NULL;
-
return name;
}
+/*
+ * Routine: thread_get_special_port [kernel call]
+ * Purpose:
+ * Clones a send right for one of the thread's
+ * special ports.
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS Extracted a send right.
+ * KERN_INVALID_ARGUMENT The thread is null.
+ * KERN_FAILURE The thread is dead.
+ * KERN_INVALID_ARGUMENT Invalid special port.
+ */
+
+kern_return_t
+thread_get_special_port(
+ thread_t thread,
+ int which,
+ ipc_port_t *portp)
+{
+ kern_return_t result = KERN_SUCCESS;
+ ipc_port_t *whichp;
+
+ if (thread == THREAD_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ switch (which) {
+
+ case THREAD_KERNEL_PORT:
+ whichp = &thread->ith_sself;
+ break;
+
+ default:
+ return (KERN_INVALID_ARGUMENT);
+ }
+
+ thread_mtx_lock(thread);
+
+ if (thread->active)
+ *portp = ipc_port_copy_send(*whichp);
+ else
+ result = KERN_FAILURE;
+
+ thread_mtx_unlock(thread);
+
+ return (result);
+}
+
+/*
+ * Routine: thread_set_special_port [kernel call]
+ * Purpose:
+ * Changes one of the thread's special ports,
+ * setting it to the supplied send right.
+ * Conditions:
+ * Nothing locked. If successful, consumes
+ * the supplied send right.
+ * Returns:
+ * KERN_SUCCESS Changed the special port.
+ * KERN_INVALID_ARGUMENT The thread is null.
+ * KERN_FAILURE The thread is dead.
+ * KERN_INVALID_ARGUMENT Invalid special port.
+ */
+
+kern_return_t
+thread_set_special_port(
+ thread_t thread,
+ int which,
+ ipc_port_t port)
+{
+ kern_return_t result = KERN_SUCCESS;
+ ipc_port_t *whichp, old = IP_NULL;
+
+ if (thread == THREAD_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ switch (which) {
+
+ case THREAD_KERNEL_PORT:
+ whichp = &thread->ith_sself;
+ break;
+
+ default:
+ return (KERN_INVALID_ARGUMENT);
+ }
+
+ thread_mtx_lock(thread);
+
+ if (thread->active) {
+ old = *whichp;
+ *whichp = port;
+ }
+ else
+ result = KERN_FAILURE;
+
+ thread_mtx_unlock(thread);
+
+ if (IP_VALID(old))
+ ipc_port_release_send(old);
+
+ return (result);
+}
+
/*
* Routine: task_get_special_port [kernel call]
* Purpose:
int which,
ipc_port_t *portp)
{
- ipc_port_t *whichp;
ipc_port_t port;
if (task == TASK_NULL)
return KERN_INVALID_ARGUMENT;
+ itk_lock(task);
+ if (task->itk_self == IP_NULL) {
+ itk_unlock(task);
+ return KERN_FAILURE;
+ }
+
switch (which) {
case TASK_KERNEL_PORT:
- whichp = &task->itk_sself;
+ port = ipc_port_copy_send(task->itk_sself);
+ break;
+
+ case TASK_NAME_PORT:
+ port = ipc_port_make_send(task->itk_nself);
break;
case TASK_HOST_PORT:
- whichp = &task->itk_host;
+ port = ipc_port_copy_send(task->itk_host);
break;
case TASK_BOOTSTRAP_PORT:
- whichp = &task->itk_bootstrap;
+ port = ipc_port_copy_send(task->itk_bootstrap);
+ break;
+
+ case TASK_SEATBELT_PORT:
+ port = ipc_port_copy_send(task->itk_seatbelt);
break;
- case TASK_WIRED_LEDGER_PORT:
- whichp = &task->wired_ledger_port;
- break;
+ case TASK_ACCESS_PORT:
+ port = ipc_port_copy_send(task->itk_task_access);
+ break;
+
+ case TASK_DEBUG_CONTROL_PORT:
+ port = ipc_port_copy_send(task->itk_debug_control);
+ break;
- case TASK_PAGED_LEDGER_PORT:
- whichp = &task->paged_ledger_port;
- break;
-
default:
+ itk_unlock(task);
return KERN_INVALID_ARGUMENT;
}
-
- itk_lock(task);
- if (task->itk_self == IP_NULL) {
- itk_unlock(task);
- return KERN_FAILURE;
- }
-
- port = ipc_port_copy_send(*whichp);
itk_unlock(task);
*portp = port;
* KERN_INVALID_ARGUMENT The task is null.
* KERN_FAILURE The task/space is dead.
* KERN_INVALID_ARGUMENT Invalid special port.
+ * KERN_NO_ACCESS Attempted overwrite of seatbelt port.
*/
kern_return_t
whichp = &task->itk_bootstrap;
break;
- case TASK_WIRED_LEDGER_PORT:
- whichp = &task->wired_ledger_port;
- break;
+ case TASK_SEATBELT_PORT:
+ whichp = &task->itk_seatbelt;
+ break;
+
+ case TASK_ACCESS_PORT:
+ whichp = &task->itk_task_access;
+ break;
+
+ case TASK_DEBUG_CONTROL_PORT:
+ whichp = &task->itk_debug_control;
+ break;
+
- case TASK_PAGED_LEDGER_PORT:
- whichp = &task->paged_ledger_port;
- break;
-
default:
return KERN_INVALID_ARGUMENT;
}/* switch */
return KERN_FAILURE;
}
+ /* do not allow overwrite of seatbelt or task access ports */
+ if ((TASK_SEATBELT_PORT == which || TASK_ACCESS_PORT == which)
+ && IP_VALID(*whichp)) {
+ itk_unlock(task);
+ return KERN_NO_ACCESS;
+ }
+
old = *whichp;
*whichp = port;
itk_unlock(task);
* KERN_SUCCESS Stashed the port rights.
* KERN_INVALID_ARGUMENT The task is null.
* KERN_INVALID_ARGUMENT The task is dead.
+ * KERN_INVALID_ARGUMENT The memory param is null.
* KERN_INVALID_ARGUMENT Too many port rights supplied.
*/
mach_msg_type_number_t portsCnt)
{
ipc_port_t ports[TASK_PORT_REGISTER_MAX];
- int i;
+ unsigned int i;
if ((task == TASK_NULL) ||
- (portsCnt > TASK_PORT_REGISTER_MAX))
+ (portsCnt > TASK_PORT_REGISTER_MAX) ||
+ (portsCnt && memory == NULL))
return KERN_INVALID_ARGUMENT;
/*
*/
if (portsCnt != 0)
- kfree((vm_offset_t) memory,
+ kfree(memory,
(vm_size_t) (portsCnt * sizeof(mach_port_t)));
return KERN_SUCCESS;
mach_port_array_t *portsp,
mach_msg_type_number_t *portsCnt)
{
- vm_offset_t memory;
+ void *memory;
vm_size_t size;
ipc_port_t *ports;
int i;
- kern_return_t kr;
-
if (task == TASK_NULL)
return KERN_INVALID_ARGUMENT;
task_t
convert_port_to_locked_task(ipc_port_t port)
{
+ int try_failed_count = 0;
+
while (IP_VALID(port)) {
task_t task;
ip_unlock(port);
return(task);
}
+ try_failed_count++;
ip_unlock(port);
- mutex_pause();
+ mutex_pause(try_failed_count);
}
return TASK_NULL;
}
*/
task_t
convert_port_to_task(
- ipc_port_t port)
+ ipc_port_t port)
{
- task_t task;
+ task_t task = TASK_NULL;
- task = convert_port_to_locked_task(port);
- if (task) {
- task->ref_count++;
- task_unlock(task);
+ if (IP_VALID(port)) {
+ ip_lock(port);
+
+ if ( ip_active(port) &&
+ ip_kotype(port) == IKOT_TASK ) {
+ task = (task_t)port->ip_kobject;
+ assert(task != TASK_NULL);
+
+ task_reference_internal(task);
+ }
+
+ ip_unlock(port);
}
- return task;
+
+ return (task);
}
/*
- * Routine: convert_port_to_space
+ * Routine: convert_port_to_task_name
* Purpose:
- * Convert from a port to a space.
- * Doesn't consume the port ref; produces a space ref,
+ * Convert from a port to a task name.
+ * Doesn't consume the port ref; produces a task name ref,
* which may be null.
* Conditions:
* Nothing locked.
*/
-ipc_space_t
-convert_port_to_space(
- ipc_port_t port)
+task_name_t
+convert_port_to_task_name(
+ ipc_port_t port)
{
- ipc_space_t space;
- task_t task;
-
- task = convert_port_to_locked_task(port);
+ task_name_t task = TASK_NULL;
- if (task == TASK_NULL)
- return IPC_SPACE_NULL;
+ if (IP_VALID(port)) {
+ ip_lock(port);
- if (!task->active) {
- task_unlock(task);
- return IPC_SPACE_NULL;
- }
-
- space = task->itk_space;
- is_reference(space);
- task_unlock(task);
- return (space);
-}
+ if ( ip_active(port) &&
+ (ip_kotype(port) == IKOT_TASK ||
+ ip_kotype(port) == IKOT_TASK_NAME)) {
+ task = (task_name_t)port->ip_kobject;
+ assert(task != TASK_NAME_NULL);
-upl_t
-convert_port_to_upl(
- ipc_port_t port)
-{
- upl_t upl;
+ task_reference_internal(task);
+ }
- ip_lock(port);
- if (!ip_active(port) || (ip_kotype(port) != IKOT_UPL)) {
- ip_unlock(port);
- return (upl_t)NULL;
+ ip_unlock(port);
}
- upl = (upl_t) port->ip_kobject;
- ip_unlock(port);
- upl_lock(upl);
- upl->ref_count+=1;
- upl_unlock(upl);
- return upl;
-}
-
-mach_port_t
-convert_upl_to_port(
- upl_t upl)
-{
- return MACH_PORT_NULL;
-}
-__private_extern__ void
-upl_no_senders(
- upl_t upl,
- mach_port_mscount_t mscount)
-{
- return;
+ return (task);
}
/*
- * Routine: convert_port_entry_to_map
+ * Routine: convert_port_to_task_suspension_token
* Purpose:
- * Convert from a port specifying an entry or a task
- * to a map. Doesn't consume the port ref; produces a map ref,
- * which may be null. Unlike convert_port_to_map, the
- * port may be task or a named entry backed.
+ * Convert from a port to a task suspension token.
+ * Doesn't consume the port ref; produces a suspension token ref,
+ * which may be null.
* Conditions:
* Nothing locked.
*/
-
-
-vm_map_t
-convert_port_entry_to_map(
- ipc_port_t port)
+task_suspension_token_t
+convert_port_to_task_suspension_token(
+ ipc_port_t port)
{
- task_t task;
- vm_map_t map;
- vm_named_entry_t named_entry;
-
- if(IP_VALID(port) && (ip_kotype(port) == IKOT_NAMED_ENTRY)) {
- while(TRUE) {
- ip_lock(port);
- if(ip_active(port) && (ip_kotype(port)
- == IKOT_NAMED_ENTRY)) {
- named_entry =
- (vm_named_entry_t)port->ip_kobject;
- if (!(mutex_try(&(named_entry)->Lock))) {
- ip_unlock(port);
- mutex_pause();
- continue;
- }
- named_entry->ref_count++;
- mutex_unlock(&(named_entry)->Lock);
- ip_unlock(port);
- if ((named_entry->is_sub_map) &&
- (named_entry->protection
- & VM_PROT_WRITE)) {
- map = named_entry->backing.map;
- } else {
- mach_destroy_memory_entry(port);
- return VM_MAP_NULL;
- }
- vm_map_reference_swap(map);
- mach_destroy_memory_entry(port);
- break;
- }
- else
- return VM_MAP_NULL;
- }
- } else {
- task_t task;
+ task_suspension_token_t task = TASK_NULL;
- task = convert_port_to_locked_task(port);
-
- if (task == TASK_NULL)
- return VM_MAP_NULL;
+ if (IP_VALID(port)) {
+ ip_lock(port);
- if (!task->active) {
- task_unlock(task);
- return VM_MAP_NULL;
+ if ( ip_active(port) &&
+ ip_kotype(port) == IKOT_TASK_RESUME) {
+ task = (task_suspension_token_t)port->ip_kobject;
+ assert(task != TASK_NULL);
+
+ task_reference_internal(task);
}
-
- map = task->map;
- vm_map_reference_swap(map);
- task_unlock(task);
+
+ ip_unlock(port);
}
- return map;
+ return (task);
}
/*
- * Routine: convert_port_entry_to_object
+ * Routine: convert_port_to_space
* Purpose:
- * Convert from a port specifying a named entry to an
- * object. Doesn't consume the port ref; produces a map ref,
- * which may be null.
+ * Convert from a port to a space.
+ * Doesn't consume the port ref; produces a space ref,
+ * which may be null.
* Conditions:
* Nothing locked.
*/
-
-
-vm_object_t
-convert_port_entry_to_object(
+ipc_space_t
+convert_port_to_space(
ipc_port_t port)
{
- vm_object_t object;
- vm_named_entry_t named_entry;
-
- if(IP_VALID(port) && (ip_kotype(port) == IKOT_NAMED_ENTRY)) {
- while(TRUE) {
- ip_lock(port);
- if(ip_active(port) && (ip_kotype(port)
- == IKOT_NAMED_ENTRY)) {
- named_entry =
- (vm_named_entry_t)port->ip_kobject;
- if (!(mutex_try(&(named_entry)->Lock))) {
- ip_unlock(port);
- mutex_pause();
- continue;
- }
- named_entry->ref_count++;
- mutex_unlock(&(named_entry)->Lock);
- ip_unlock(port);
- if ((!named_entry->is_sub_map) &&
- (named_entry->protection
- & VM_PROT_WRITE)) {
- object = named_entry->object;
- } else {
- mach_destroy_memory_entry(port);
- return (vm_object_t)NULL;
- }
- vm_object_reference(named_entry->object);
- mach_destroy_memory_entry(port);
- break;
- }
- else
- return (vm_object_t)NULL;
- }
- } else {
- return (vm_object_t)NULL;
- }
+ ipc_space_t space;
+ task_t task;
+
+ task = convert_port_to_locked_task(port);
+
+ if (task == TASK_NULL)
+ return IPC_SPACE_NULL;
- return object;
+ if (!task->active) {
+ task_unlock(task);
+ return IPC_SPACE_NULL;
+ }
+
+ space = task->itk_space;
+ is_reference(space);
+ task_unlock(task);
+ return (space);
}
/*
/*
- * Routine: convert_port_to_act
+ * Routine: convert_port_to_thread
* Purpose:
- * Convert from a port to a thr_act.
- * Doesn't consume the port ref; produces an thr_act ref,
+ * Convert from a port to a thread.
+ * Doesn't consume the port ref; produces an thread ref,
* which may be null.
* Conditions:
* Nothing locked.
*/
-thread_act_t
-convert_port_to_act( ipc_port_t port )
+thread_t
+convert_port_to_thread(
+ ipc_port_t port)
{
- boolean_t r;
- thread_act_t thr_act = 0;
+ thread_t thread = THREAD_NULL;
- r = FALSE;
- while (!r && IP_VALID(port)) {
+ if (IP_VALID(port)) {
ip_lock(port);
- r = ref_act_port_locked(port, &thr_act);
- /* port unlocked */
- }
- return (thr_act);
-}
-boolean_t
-ref_act_port_locked( ipc_port_t port, thread_act_t *pthr_act )
-{
- thread_act_t thr_act;
+ if ( ip_active(port) &&
+ ip_kotype(port) == IKOT_THREAD ) {
+ thread = (thread_t)port->ip_kobject;
+ assert(thread != THREAD_NULL);
- thr_act = 0;
- if (ip_active(port) &&
- (ip_kotype(port) == IKOT_ACT)) {
- thr_act = (thread_act_t) port->ip_kobject;
- assert(thr_act != THR_ACT_NULL);
-
- /*
- * Normal lock ordering is act_lock(), then ip_lock().
- * Allow out-of-order locking here, using
- * act_reference_act_locked() to accomodate it.
- */
- if (!act_lock_try(thr_act)) {
- ip_unlock(port);
- mutex_pause();
- return (FALSE);
+ thread_reference_internal(thread);
}
- act_locked_act_reference(thr_act);
- act_unlock(thr_act);
+
+ ip_unlock(port);
}
- *pthr_act = thr_act;
- ip_unlock(port);
- return (TRUE);
+
+ return (thread);
}
/*
- * Routine: port_name_to_act
+ * Routine: port_name_to_thread
* Purpose:
- * Convert from a port name to an act reference
- * A name of MACH_PORT_NULL is valid for the null act
+ * Convert from a port name to an thread reference
+ * A name of MACH_PORT_NULL is valid for the null thread.
* Conditions:
* Nothing locked.
*/
-thread_act_t
-port_name_to_act(
+thread_t
+port_name_to_thread(
mach_port_name_t name)
{
- thread_act_t thr_act = THR_ACT_NULL;
- ipc_port_t kern_port;
- kern_return_t kr;
+ thread_t thread = THREAD_NULL;
+ ipc_port_t kport;
if (MACH_PORT_VALID(name)) {
- kr = ipc_object_copyin(current_space(), name,
- MACH_MSG_TYPE_COPY_SEND,
- (ipc_object_t *) &kern_port);
- if (kr != KERN_SUCCESS)
- return THR_ACT_NULL;
+ if (ipc_object_copyin(current_space(), name,
+ MACH_MSG_TYPE_COPY_SEND,
+ (ipc_object_t *)&kport) != KERN_SUCCESS)
+ return (THREAD_NULL);
- thr_act = convert_port_to_act(kern_port);
+ thread = convert_port_to_thread(kport);
- if (IP_VALID(kern_port))
- ipc_port_release_send(kern_port);
+ if (IP_VALID(kport))
+ ipc_port_release_send(kport);
}
- return thr_act;
+
+ return (thread);
}
task_t
itk_lock(task);
if (task->itk_self != IP_NULL)
-#if NORMA_TASK
- if (task->map == VM_MAP_NULL)
- /* norma placeholder task */
- port = ipc_port_copy_send(task->itk_self);
- else
-#endif /* NORMA_TASK */
port = ipc_port_make_send(task->itk_self);
else
port = IP_NULL;
}
/*
- * Routine: convert_act_to_port
+ * Routine: convert_task_suspend_token_to_port
* Purpose:
- * Convert from a thr_act to a port.
- * Consumes an thr_act ref; produces a naked send right
- * which may be invalid.
+ * Convert from a task suspension token to a port.
+ * Consumes a task suspension token ref; produces a naked send-once right
+ * which may be invalid.
+ * Conditions:
+ * Nothing locked.
+ */
+ipc_port_t
+convert_task_suspension_token_to_port(
+ task_suspension_token_t task)
+{
+ ipc_port_t port;
+
+ task_lock(task);
+ if (task->active) {
+ if (task->itk_resume == IP_NULL) {
+ task->itk_resume = ipc_port_alloc_kernel();
+ if (!IP_VALID(task->itk_resume)) {
+ panic("failed to create resume port");
+ }
+
+ ipc_kobject_set(task->itk_resume, (ipc_kobject_t) task, IKOT_TASK_RESUME);
+ }
+
+ /*
+ * Create a send-once right for each instance of a direct user-called
+ * task_suspend2 call. Each time one of these send-once rights is abandoned,
+ * the notification handler will resume the target task.
+ */
+ port = ipc_port_make_sonce(task->itk_resume);
+ assert(IP_VALID(port));
+ } else {
+ port = IP_NULL;
+ }
+
+ task_unlock(task);
+ task_suspension_token_deallocate(task);
+
+ return port;
+}
+
+
+/*
+ * Routine: convert_task_name_to_port
+ * Purpose:
+ * Convert from a task name ref to a port.
+ * Consumes a task name ref; produces a naked send right
+ * which may be invalid.
* Conditions:
* Nothing locked.
*/
ipc_port_t
-convert_act_to_port(thr_act)
- thread_act_t thr_act;
+convert_task_name_to_port(
+ task_name_t task_name)
{
ipc_port_t port;
- act_lock(thr_act);
- if (thr_act->ith_self != IP_NULL)
- port = ipc_port_make_send(thr_act->ith_self);
+ itk_lock(task_name);
+ if (task_name->itk_nself != IP_NULL)
+ port = ipc_port_make_send(task_name->itk_nself);
else
port = IP_NULL;
- act_unlock(thr_act);
+ itk_unlock(task_name);
- act_deallocate(thr_act);
+ task_name_deallocate(task_name);
return port;
}
+/*
+ * Routine: convert_thread_to_port
+ * Purpose:
+ * Convert from a thread to a port.
+ * Consumes an thread ref; produces a naked send right
+ * which may be invalid.
+ * Conditions:
+ * Nothing locked.
+ */
+
+ipc_port_t
+convert_thread_to_port(
+ thread_t thread)
+{
+ ipc_port_t port;
+
+ thread_mtx_lock(thread);
+
+ if (thread->ith_self != IP_NULL)
+ port = ipc_port_make_send(thread->ith_self);
+ else
+ port = IP_NULL;
+
+ thread_mtx_unlock(thread);
+
+ thread_deallocate(thread);
+
+ return (port);
+}
+
/*
* Routine: space_deallocate
* Purpose:
kern_return_t
thread_set_exception_ports(
- thread_act_t thr_act,
+ thread_t thread,
exception_mask_t exception_mask,
- ipc_port_t new_port,
- exception_behavior_t new_behavior,
- thread_state_flavor_t new_flavor)
+ ipc_port_t new_port,
+ exception_behavior_t new_behavior,
+ thread_state_flavor_t new_flavor)
{
+ ipc_port_t old_port[EXC_TYPES_COUNT];
+ boolean_t privileged = current_task()->sec_token.val[0] == 0;
register int i;
- ipc_port_t old_port[EXC_TYPES_COUNT];
- if (!thr_act)
- return KERN_INVALID_ARGUMENT;
+ if (thread == THREAD_NULL)
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL)
- return KERN_INVALID_ARGUMENT;
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_CODES) {
+
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
}
}
* VALID_THREAD_STATE_FLAVOR architecture dependent macro defined in
* osfmk/mach/ARCHITECTURE/thread_status.h
*/
- if (!VALID_THREAD_STATE_FLAVOR(new_flavor)) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (new_flavor != 0 && !VALID_THREAD_STATE_FLAVOR(new_flavor))
+ return (KERN_INVALID_ARGUMENT);
- act_lock(thr_act);
- if (!thr_act->active) {
- act_unlock(thr_act);
- return KERN_FAILURE;
+ thread_mtx_lock(thread);
+
+ if (!thread->active) {
+ thread_mtx_unlock(thread);
+
+ return (KERN_FAILURE);
}
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (thread->exc_actions == NULL) {
+ ipc_thread_init_exc_actions(thread);
+ }
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i) {
if (exception_mask & (1 << i)) {
- old_port[i] = thr_act->exc_actions[i].port;
- thr_act->exc_actions[i].port =
- ipc_port_copy_send(new_port);
- thr_act->exc_actions[i].behavior = new_behavior;
- thr_act->exc_actions[i].flavor = new_flavor;
- } else
+ old_port[i] = thread->exc_actions[i].port;
+ thread->exc_actions[i].port = ipc_port_copy_send(new_port);
+ thread->exc_actions[i].behavior = new_behavior;
+ thread->exc_actions[i].flavor = new_flavor;
+ thread->exc_actions[i].privileged = privileged;
+ }
+ else
old_port[i] = IP_NULL;
- }/* for */
- /*
- * Consume send rights without any lock held.
- */
- act_unlock(thr_act);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
+ }
+
+ thread_mtx_unlock(thread);
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i)
if (IP_VALID(old_port[i]))
ipc_port_release_send(old_port[i]);
+
if (IP_VALID(new_port)) /* consume send right */
ipc_port_release_send(new_port);
- return KERN_SUCCESS;
-}/* thread_set_exception_port */
+ return (KERN_SUCCESS);
+}
kern_return_t
task_set_exception_ports(
- task_t task,
+ task_t task,
exception_mask_t exception_mask,
- ipc_port_t new_port,
- exception_behavior_t new_behavior,
- thread_state_flavor_t new_flavor)
+ ipc_port_t new_port,
+ exception_behavior_t new_behavior,
+ thread_state_flavor_t new_flavor)
{
+ ipc_port_t old_port[EXC_TYPES_COUNT];
+ boolean_t privileged = current_task()->sec_token.val[0] == 0;
register int i;
- ipc_port_t old_port[EXC_TYPES_COUNT];
- if (task == TASK_NULL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (task == TASK_NULL)
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_CODES) {
+
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
}
}
- /* Cannot easily check "new_flavor", but that just means that
- * the flavor in the generated exception message might be garbage:
- * GIGO */
- itk_lock(task);
- if (task->itk_self == IP_NULL) {
- itk_unlock(task);
- return KERN_FAILURE;
- }
+ /*
+ * Check the validity of the thread_state_flavor by calling the
+ * VALID_THREAD_STATE_FLAVOR architecture dependent macro defined in
+ * osfmk/mach/ARCHITECTURE/thread_status.h
+ */
+ if (new_flavor != 0 && !VALID_THREAD_STATE_FLAVOR(new_flavor))
+ return (KERN_INVALID_ARGUMENT);
+
+ itk_lock(task);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (task->itk_self == IP_NULL) {
+ itk_unlock(task);
+
+ return (KERN_FAILURE);
+ }
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i) {
if (exception_mask & (1 << i)) {
old_port[i] = task->exc_actions[i].port;
task->exc_actions[i].port =
ipc_port_copy_send(new_port);
task->exc_actions[i].behavior = new_behavior;
task->exc_actions[i].flavor = new_flavor;
- } else
+ task->exc_actions[i].privileged = privileged;
+ }
+ else
old_port[i] = IP_NULL;
- }/* for */
+ }
- /*
- * Consume send rights without any lock held.
- */
- itk_unlock(task);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
+ itk_unlock(task);
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i)
if (IP_VALID(old_port[i]))
ipc_port_release_send(old_port[i]);
+
if (IP_VALID(new_port)) /* consume send right */
ipc_port_release_send(new_port);
- return KERN_SUCCESS;
-}/* task_set_exception_port */
+ return (KERN_SUCCESS);
+}
/*
* Routine: thread/task_swap_exception_ports [kernel call]
kern_return_t
thread_swap_exception_ports(
- thread_act_t thr_act,
- exception_mask_t exception_mask,
- ipc_port_t new_port,
+ thread_t thread,
+ exception_mask_t exception_mask,
+ ipc_port_t new_port,
exception_behavior_t new_behavior,
thread_state_flavor_t new_flavor,
exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
+ mach_msg_type_number_t *CountCnt,
exception_port_array_t ports,
- exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ exception_behavior_array_t behaviors,
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
- ipc_port_t old_port[EXC_TYPES_COUNT];
+ ipc_port_t old_port[EXC_TYPES_COUNT];
+ boolean_t privileged = current_task()->sec_token.val[0] == 0;
+ unsigned int i, j, count;
- if (!thr_act)
- return KERN_INVALID_ARGUMENT;
+ if (thread == THREAD_NULL)
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_CODES) {
+
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
}
}
- /* Cannot easily check "new_flavor", but that just means that
- * the flavor in the generated exception message might be garbage:
- * GIGO */
- act_lock(thr_act);
- if (!thr_act->active) {
- act_unlock(thr_act);
- return KERN_FAILURE;
+ if (new_flavor != 0 && !VALID_THREAD_STATE_FLAVOR(new_flavor))
+ return (KERN_INVALID_ARGUMENT);
+
+ thread_mtx_lock(thread);
+
+ if (!thread->active) {
+ thread_mtx_unlock(thread);
+
+ return (KERN_FAILURE);
}
- count = 0;
+ if (thread->exc_actions == NULL) {
+ ipc_thread_init_exc_actions(thread);
+ }
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ assert(EXC_TYPES_COUNT > FIRST_EXCEPTION);
+ for (count = 0, i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT && count < *CountCnt; ++i) {
if (exception_mask & (1 << i)) {
- for (j = 0; j < count; j++) {
-/*
- * search for an identical entry, if found
- * set corresponding mask for this exception.
- */
- if (thr_act->exc_actions[i].port == ports[j] &&
- thr_act->exc_actions[i].behavior ==behaviors[j]
- && thr_act->exc_actions[i].flavor ==flavors[j])
- {
+ for (j = 0; j < count; ++j) {
+ /*
+ * search for an identical entry, if found
+ * set corresponding mask for this exception.
+ */
+ if ( thread->exc_actions[i].port == ports[j] &&
+ thread->exc_actions[i].behavior == behaviors[j] &&
+ thread->exc_actions[i].flavor == flavors[j] ) {
masks[j] |= (1 << i);
break;
}
- }/* for */
+ }
+
if (j == count) {
masks[j] = (1 << i);
- ports[j] =
- ipc_port_copy_send(thr_act->exc_actions[i].port);
+ ports[j] = ipc_port_copy_send(thread->exc_actions[i].port);
- behaviors[j] = thr_act->exc_actions[i].behavior;
- flavors[j] = thr_act->exc_actions[i].flavor;
- count++;
+ behaviors[j] = thread->exc_actions[i].behavior;
+ flavors[j] = thread->exc_actions[i].flavor;
+ ++count;
}
- old_port[i] = thr_act->exc_actions[i].port;
- thr_act->exc_actions[i].port =
- ipc_port_copy_send(new_port);
- thr_act->exc_actions[i].behavior = new_behavior;
- thr_act->exc_actions[i].flavor = new_flavor;
- if (count > *CountCnt) {
- break;
- }
- } else
+ old_port[i] = thread->exc_actions[i].port;
+ thread->exc_actions[i].port = ipc_port_copy_send(new_port);
+ thread->exc_actions[i].behavior = new_behavior;
+ thread->exc_actions[i].flavor = new_flavor;
+ thread->exc_actions[i].privileged = privileged;
+ }
+ else
old_port[i] = IP_NULL;
- }/* for */
+ }
- /*
- * Consume send rights without any lock held.
- */
- act_unlock(thr_act);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
+ thread_mtx_unlock(thread);
+
+ while (--i >= FIRST_EXCEPTION) {
if (IP_VALID(old_port[i]))
ipc_port_release_send(old_port[i]);
+ }
+
if (IP_VALID(new_port)) /* consume send right */
ipc_port_release_send(new_port);
+
*CountCnt = count;
- return KERN_SUCCESS;
-}/* thread_swap_exception_ports */
+
+ return (KERN_SUCCESS);
+}
kern_return_t
task_swap_exception_ports(
- task_t task,
- exception_mask_t exception_mask,
- ipc_port_t new_port,
+ task_t task,
+ exception_mask_t exception_mask,
+ ipc_port_t new_port,
exception_behavior_t new_behavior,
thread_state_flavor_t new_flavor,
exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
+ mach_msg_type_number_t *CountCnt,
exception_port_array_t ports,
- exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ exception_behavior_array_t behaviors,
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
- ipc_port_t old_port[EXC_TYPES_COUNT];
+ ipc_port_t old_port[EXC_TYPES_COUNT];
+ boolean_t privileged = current_task()->sec_token.val[0] == 0;
+ unsigned int i, j, count;
if (task == TASK_NULL)
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_CODES) {
+
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
}
}
- /* Cannot easily check "new_flavor", but that just means that
- * the flavor in the generated exception message might be garbage:
- * GIGO */
+
+ if (new_flavor != 0 && !VALID_THREAD_STATE_FLAVOR(new_flavor))
+ return (KERN_INVALID_ARGUMENT);
itk_lock(task);
+
if (task->itk_self == IP_NULL) {
itk_unlock(task);
- return KERN_FAILURE;
- }
- count = 0;
+ return (KERN_FAILURE);
+ }
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ assert(EXC_TYPES_COUNT > FIRST_EXCEPTION);
+ for (count = 0, i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT && count < *CountCnt; ++i) {
if (exception_mask & (1 << i)) {
for (j = 0; j < count; j++) {
-/*
- * search for an identical entry, if found
- * set corresponding mask for this exception.
- */
- if (task->exc_actions[i].port == ports[j] &&
- task->exc_actions[i].behavior == behaviors[j]
- && task->exc_actions[i].flavor == flavors[j])
- {
+ /*
+ * search for an identical entry, if found
+ * set corresponding mask for this exception.
+ */
+ if ( task->exc_actions[i].port == ports[j] &&
+ task->exc_actions[i].behavior == behaviors[j] &&
+ task->exc_actions[i].flavor == flavors[j] ) {
masks[j] |= (1 << i);
break;
}
- }/* for */
+ }
+
if (j == count) {
masks[j] = (1 << i);
- ports[j] =
- ipc_port_copy_send(task->exc_actions[i].port);
+ ports[j] = ipc_port_copy_send(task->exc_actions[i].port);
behaviors[j] = task->exc_actions[i].behavior;
flavors[j] = task->exc_actions[i].flavor;
- count++;
+ ++count;
}
+
old_port[i] = task->exc_actions[i].port;
- task->exc_actions[i].port =
- ipc_port_copy_send(new_port);
+
+ task->exc_actions[i].port = ipc_port_copy_send(new_port);
task->exc_actions[i].behavior = new_behavior;
task->exc_actions[i].flavor = new_flavor;
- if (count > *CountCnt) {
- break;
- }
- } else
+ task->exc_actions[i].privileged = privileged;
+ }
+ else
old_port[i] = IP_NULL;
- }/* for */
-
+ }
- /*
- * Consume send rights without any lock held.
- */
itk_unlock(task);
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
+
+ while (--i >= FIRST_EXCEPTION) {
if (IP_VALID(old_port[i]))
ipc_port_release_send(old_port[i]);
+ }
+
if (IP_VALID(new_port)) /* consume send right */
ipc_port_release_send(new_port);
+
*CountCnt = count;
- return KERN_SUCCESS;
-}/* task_swap_exception_ports */
+ return (KERN_SUCCESS);
+}
/*
* Routine: thread/task_get_exception_ports [kernel call]
kern_return_t
thread_get_exception_ports(
- thread_act_t thr_act,
- exception_mask_t exception_mask,
+ thread_t thread,
+ exception_mask_t exception_mask,
exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
+ mach_msg_type_number_t *CountCnt,
exception_port_array_t ports,
- exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ exception_behavior_array_t behaviors,
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
+ unsigned int i, j, count;
- if (!thr_act)
- return KERN_INVALID_ARGUMENT;
+ if (thread == THREAD_NULL)
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
- act_lock(thr_act);
- if (!thr_act->active) {
- act_unlock(thr_act);
- return KERN_FAILURE;
+ thread_mtx_lock(thread);
+
+ if (!thread->active) {
+ thread_mtx_unlock(thread);
+
+ return (KERN_FAILURE);
}
count = 0;
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ if (thread->exc_actions == NULL) {
+ goto done;
+ }
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i) {
if (exception_mask & (1 << i)) {
- for (j = 0; j < count; j++) {
-/*
- * search for an identical entry, if found
- * set corresponding mask for this exception.
- */
- if (thr_act->exc_actions[i].port == ports[j] &&
- thr_act->exc_actions[i].behavior ==behaviors[j]
- && thr_act->exc_actions[i].flavor == flavors[j])
- {
+ for (j = 0; j < count; ++j) {
+ /*
+ * search for an identical entry, if found
+ * set corresponding mask for this exception.
+ */
+ if ( thread->exc_actions[i].port == ports[j] &&
+ thread->exc_actions[i].behavior ==behaviors[j] &&
+ thread->exc_actions[i].flavor == flavors[j] ) {
masks[j] |= (1 << i);
break;
}
- }/* for */
+ }
+
if (j == count) {
masks[j] = (1 << i);
- ports[j] =
- ipc_port_copy_send(thr_act->exc_actions[i].port);
- behaviors[j] = thr_act->exc_actions[i].behavior;
- flavors[j] = thr_act->exc_actions[i].flavor;
- count++;
- if (count >= *CountCnt) {
+ ports[j] = ipc_port_copy_send(thread->exc_actions[i].port);
+ behaviors[j] = thread->exc_actions[i].behavior;
+ flavors[j] = thread->exc_actions[i].flavor;
+ ++count;
+ if (count >= *CountCnt)
break;
- }
}
}
- }/* for */
+ }
- act_unlock(thr_act);
+done:
+ thread_mtx_unlock(thread);
*CountCnt = count;
- return KERN_SUCCESS;
-}/* thread_get_exception_ports */
+
+ return (KERN_SUCCESS);
+}
kern_return_t
task_get_exception_ports(
- task_t task,
- exception_mask_t exception_mask,
+ task_t task,
+ exception_mask_t exception_mask,
exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
+ mach_msg_type_number_t *CountCnt,
exception_port_array_t ports,
- exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ exception_behavior_array_t behaviors,
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
+ unsigned int i, j, count;
if (task == TASK_NULL)
- return KERN_INVALID_ARGUMENT;
+ return (KERN_INVALID_ARGUMENT);
- if (exception_mask & ~EXC_MASK_ALL) {
- return KERN_INVALID_ARGUMENT;
- }
+ if (exception_mask & ~EXC_MASK_VALID)
+ return (KERN_INVALID_ARGUMENT);
itk_lock(task);
+
if (task->itk_self == IP_NULL) {
itk_unlock(task);
- return KERN_FAILURE;
+
+ return (KERN_FAILURE);
}
count = 0;
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; ++i) {
if (exception_mask & (1 << i)) {
- for (j = 0; j < count; j++) {
-/*
- * search for an identical entry, if found
- * set corresponding mask for this exception.
- */
- if (task->exc_actions[i].port == ports[j] &&
- task->exc_actions[i].behavior == behaviors[j]
- && task->exc_actions[i].flavor == flavors[j])
- {
+ for (j = 0; j < count; ++j) {
+ /*
+ * search for an identical entry, if found
+ * set corresponding mask for this exception.
+ */
+ if ( task->exc_actions[i].port == ports[j] &&
+ task->exc_actions[i].behavior == behaviors[j] &&
+ task->exc_actions[i].flavor == flavors[j] ) {
masks[j] |= (1 << i);
break;
}
- }/* for */
+ }
+
if (j == count) {
masks[j] = (1 << i);
- ports[j] =
- ipc_port_copy_send(task->exc_actions[i].port);
+ ports[j] = ipc_port_copy_send(task->exc_actions[i].port);
behaviors[j] = task->exc_actions[i].behavior;
flavors[j] = task->exc_actions[i].flavor;
- count++;
- if (count > *CountCnt) {
+ ++count;
+ if (count > *CountCnt)
break;
- }
}
}
- }/* for */
+ }
itk_unlock(task);
*CountCnt = count;
- return KERN_SUCCESS;
-}/* task_get_exception_ports */
+
+ return (KERN_SUCCESS);
+}
projects / apple / xnu.git / blobdiff