/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 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.
*/
+/*
+ * 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.
+ */
/*
*/
* Task and thread related IPC functions.
*/
+#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>
+
+#if CONFIG_EMBEDDED && !SECURE_KERNEL
+extern int cs_relax_platform_task_ports;
+#endif
+
+/* forward declarations */
+task_t convert_port_to_locked_task(ipc_port_t port);
+task_inspect_t convert_port_to_locked_task_inspect(ipc_port_t port);
+static void ipc_port_bind_special_reply_port_locked(ipc_port_t port);
+static kern_return_t ipc_port_unbind_special_reply_port(thread_t thread, boolean_t unbind_active_port);
+kern_return_t task_conversion_eval(task_t caller, task_t victim);
/*
* Routine: ipc_task_init
void
ipc_task_init(
- task_t task,
- task_t parent)
+ task_t task,
+ task_t parent)
{
ipc_space_t space;
ipc_port_t kport;
+ ipc_port_t nport;
kern_return_t kr;
int i;
kr = ipc_space_create(&ipc_table_entries[0], &space);
- if (kr != KERN_SUCCESS)
+ if (kr != KERN_SUCCESS) {
panic("ipc_task_init");
+ }
+ space->is_task = task;
kport = ipc_port_alloc_kernel();
- if (kport == IP_NULL)
+ 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_sself = ipc_port_make_send(kport);
+ task->itk_nself = nport;
+ task->itk_resume = IP_NULL; /* Lazily allocated on-demand */
+ if (task_is_a_corpse_fork(task)) {
+ /*
+ * No sender's notification for corpse would not
+ * work with a naked send right in kernel.
+ */
+ task->itk_sself = IP_NULL;
+ } else {
+ 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 CONFIG_MACF
+ task->exc_actions[0].label = NULL;
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ mac_exc_associate_action_label(&task->exc_actions[i], mac_exc_create_label());
+ }
+#endif
+
+ /* always zero-out the first (unused) array element */
+ bzero(&task->exc_actions[0], sizeof(task->exc_actions[0]));
if (parent == TASK_NULL) {
+ ipc_port_t port;
for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
task->exc_actions[i].port = IP_NULL;
+ task->exc_actions[i].flavor = 0;
+ task->exc_actions[i].behavior = 0;
+ task->exc_actions[i].privileged = FALSE;
}/* 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;
- for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
+ 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 {
itk_lock(parent);
assert(parent->itk_self != IP_NULL);
/* inherit registered ports */
- for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
+ for (i = 0; i < TASK_PORT_REGISTER_MAX; i++) {
task->itk_registered[i] =
- ipc_port_copy_send(parent->itk_registered[i]);
+ ipc_port_copy_send(parent->itk_registered[i]);
+ }
/* inherit exception and bootstrap ports */
for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
- task->exc_actions[i].port =
- ipc_port_copy_send(parent->exc_actions[i].port);
- task->exc_actions[i].flavor =
- parent->exc_actions[i].flavor;
- task->exc_actions[i].behavior =
- parent->exc_actions[i].behavior;
+ task->exc_actions[i].port =
+ ipc_port_copy_send(parent->exc_actions[i].port);
+ task->exc_actions[i].flavor =
+ 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;
+#if CONFIG_MACF
+ mac_exc_inherit_action_label(parent->exc_actions + i, task->exc_actions + i);
+#endif
}/* for */
task->itk_host =
- ipc_port_copy_send(parent->itk_host);
+ ipc_port_copy_send(parent->itk_host);
task->itk_bootstrap =
- ipc_port_copy_send(parent->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);
}
void
ipc_task_enable(
- task_t task)
+ task_t task)
{
ipc_port_t kport;
+ ipc_port_t nport;
itk_lock(task);
kport = task->itk_self;
- if (kport != IP_NULL)
+ 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);
}
void
ipc_task_disable(
- task_t 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)
+ 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);
}
void
ipc_task_terminate(
- task_t 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->itk_sself))
+ if (IP_VALID(task->itk_sself)) {
ipc_port_release_send(task->itk_sself);
+ }
for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
if (IP_VALID(task->exc_actions[i].port)) {
ipc_port_release_send(task->exc_actions[i].port);
}
- }/* for */
- if (IP_VALID(task->itk_host))
+#if CONFIG_MACF
+ mac_exc_free_action_label(task->exc_actions + i);
+#endif
+ }
+
+ if (IP_VALID(task->itk_host)) {
ipc_port_release_send(task->itk_host);
+ }
- if (IP_VALID(task->itk_bootstrap))
+ 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);
+ }
- for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
- if (IP_VALID(task->itk_registered[i]))
+ 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]);
+ }
+ }
+
+ /* 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;
+
+#if CONFIG_MACF
+ /* Fresh label to unset credentials in existing labels. */
+ struct label *unset_label = mac_exc_create_label();
+#endif
+
+ new_kport = ipc_kobject_alloc_port((ipc_kobject_t)task, IKOT_TASK,
+ IPC_KOBJECT_ALLOC_MAKE_SEND);
+
+ 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_release_send(new_kport);
+ ipc_port_dealloc_kernel(new_kport);
+#if CONFIG_MACF
+ mac_exc_free_label(unset_label);
+#endif
+ return;
+ }
+
+ old_sself = task->itk_sself;
+ task->itk_sself = task->itk_self = new_kport;
- ipc_port_release_send(task->wired_ledger_port);
- ipc_port_release_send(task->paged_ledger_port);
+ /* Set the old kport to IKOT_NONE and update the exec token while under the port lock */
+ ip_lock(old_kport);
+ ipc_kobject_set_atomically(old_kport, IKO_NULL, IKOT_NONE);
+ task->exec_token += 1;
+ ip_unlock(old_kport);
+
+ for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
+ old_exc_actions[i] = IP_NULL;
+
+ if (i == EXC_CORPSE_NOTIFY && task_corpse_pending_report(task)) {
+ continue;
+ }
+
+ if (!task->exc_actions[i].privileged) {
+#if CONFIG_MACF
+ mac_exc_update_action_label(task->exc_actions + i, unset_label);
+#endif
+ old_exc_actions[i] = task->exc_actions[i].port;
+ task->exc_actions[i].port = 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);
+
+#if CONFIG_MACF
+ mac_exc_free_label(unset_label);
+#endif
+
+ /* 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);
}
/*
void
ipc_thread_init(
- thread_t thread)
+ thread_t thread)
{
+ ipc_port_t kport;
+
+ kport = ipc_kobject_alloc_port((ipc_kobject_t)thread, IKOT_THREAD,
+ IPC_KOBJECT_ALLOC_MAKE_SEND);
+
+ thread->ith_sself = thread->ith_self = kport;
+ thread->ith_special_reply_port = NULL;
+ thread->exc_actions = NULL;
+
+#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;
}
-/*
- * 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.)
- */
+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);
+
+#if CONFIG_MACF
+ for (size_t i = 0; i < EXC_TYPES_COUNT; ++i) {
+ mac_exc_associate_action_label(thread->exc_actions + i, mac_exc_create_label());
+ }
+#endif
+}
void
-ipc_thread_terminate(
- thread_t thread)
+ipc_thread_destroy_exc_actions(
+ thread_t thread)
{
- assert(ipc_kmsg_queue_empty(&thread->ith_messages));
+ if (thread->exc_actions != NULL) {
+#if CONFIG_MACF
+ for (size_t i = 0; i < EXC_TYPES_COUNT; ++i) {
+ mac_exc_free_action_label(thread->exc_actions + i);
+ }
+#endif
- if (thread->ith_rpc_reply != IP_NULL)
- ipc_port_dealloc_reply(thread->ith_rpc_reply);
- thread->ith_rpc_reply = IP_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);
+ }
+
+ /* unbind the thread special reply port */
+ if (IP_VALID(thread->ith_special_reply_port)) {
+ ipc_port_unbind_special_reply_port(thread, TRUE);
+ }
}
/*
- * Routine: ipc_thr_act_init
+ * Routine: ipc_thread_terminate
* Purpose:
- * Initialize an thr_act's IPC state.
+ * Clean up and destroy a thread's IPC state.
* Conditions:
* Nothing locked.
*/
void
-ipc_thr_act_init(task_t task, thread_act_t thr_act)
+ipc_thread_terminate(
+ thread_t thread)
{
- ipc_port_t kport; int i;
+ ipc_port_t kport = thread->ith_self;
- kport = ipc_port_alloc_kernel();
- if (kport == IP_NULL)
- panic("ipc_thr_act_init");
+ if (kport != IP_NULL) {
+ int i;
- thr_act->ith_self = kport;
- thr_act->ith_sself = ipc_port_make_send(kport);
+ if (IP_VALID(thread->ith_sself)) {
+ ipc_port_release_send(thread->ith_sself);
+ }
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++)
- thr_act->exc_actions[i].port = IP_NULL;
+ thread->ith_sself = thread->ith_self = IP_NULL;
- ipc_kobject_set(kport, (ipc_kobject_t) thr_act, IKOT_ACT);
-}
+ 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);
+ }
-void
-ipc_thr_act_disable(thread_act_t thr_act)
-{
- int i;
- ipc_port_t kport;
+ ipc_port_dealloc_kernel(kport);
+ }
- kport = thr_act->ith_self;
+#if IMPORTANCE_INHERITANCE
+ assert(thread->ith_assertions == 0);
+#endif
- if (kport != IP_NULL)
- ipc_kobject_set(kport, IKO_NULL, IKOT_NONE);
+ assert(ipc_kmsg_queue_empty(&thread->ith_messages));
+
+ if (thread->ith_rpc_reply != IP_NULL) {
+ ipc_port_dealloc_reply(thread->ith_rpc_reply);
+ }
+
+ thread->ith_rpc_reply = IP_NULL;
}
+/*
+ * Routine: ipc_thread_reset
+ * Purpose:
+ * 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_terminate(thread_act_t thr_act)
+ipc_thread_reset(
+ thread_t thread)
{
- ipc_port_t kport; int i;
+ 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;
+
+#if CONFIG_MACF
+ struct label *new_label = mac_exc_create_label();
+#endif
+
+ new_kport = ipc_kobject_alloc_port((ipc_kobject_t)thread, IKOT_THREAD,
+ IPC_KOBJECT_ALLOC_MAKE_SEND);
+
+ thread_mtx_lock(thread);
+
+ old_kport = thread->ith_self;
+ old_sself = thread->ith_sself;
+
+ if (old_kport == IP_NULL && thread->inspection == FALSE) {
+ /* the is already terminated (can this happen?) */
+ thread_mtx_unlock(thread);
+ ipc_port_release_send(new_kport);
+ ipc_port_dealloc_kernel(new_kport);
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
+ return;
+ }
- kport = thr_act->ith_self;
+ thread->ith_sself = thread->ith_self = new_kport;
+ if (old_kport != IP_NULL) {
+ ipc_kobject_set(old_kport, IKO_NULL, IKOT_NONE);
+ }
- 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 {
+#if CONFIG_MACF
+ mac_exc_update_action_label(thread->exc_actions + i, new_label);
+#endif
+ 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);
+
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
/* 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);
+ if (old_kport != IP_NULL) {
+ ipc_port_dealloc_kernel(old_kport);
+ }
+
+ /* unbind the thread special reply port */
+ if (IP_VALID(thread->ith_special_reply_port)) {
+ ipc_port_unbind_special_reply_port(thread, TRUE);
+ }
}
/*
ipc_port_t
retrieve_task_self_fast(
- register task_t task)
+ task_t task)
{
- register ipc_port_t port;
+ __assert_only ipc_port_t sright;
+ ipc_port_t port;
assert(task == current_task());
if ((port = task->itk_sself) == task->itk_self) {
/* no interposing */
-
- ip_lock(port);
- assert(ip_active(port));
- ip_reference(port);
- port->ip_srights++;
- ip_unlock(port);
- } else
+ sright = ipc_port_copy_send(port);
+ assert(sright == port);
+ } else {
port = ipc_port_copy_send(port);
+ }
itk_unlock(task);
return port;
}
/*
- * 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_only ipc_port_t sright;
+ ipc_port_t port;
- assert(thr_act == current_act());
- act_lock(thr_act);
- assert(thr_act->ith_self != IP_NULL);
+ assert(thread == current_thread());
- if ((port = thr_act->ith_sself) == thr_act->ith_self) {
- /* no interposing */
+ thread_mtx_lock(thread);
- ip_lock(port);
- assert(ip_active(port));
- ip_reference(port);
- port->ip_srights++;
- ip_unlock(port);
- } else
+ assert(thread->ith_self != IP_NULL);
+
+ if ((port = thread->ith_sself) == thread->ith_self) {
+ /* no interposing */
+ sright = ipc_port_copy_send(port);
+ assert(sright == port);
+ } 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_act_self_fast(thr_act);
- return ipc_port_copyout_send(sright, task->itk_space);
+ sright = retrieve_thread_self_fast(thread);
+ name = ipc_port_copyout_send(sright, task->itk_space);
+ return name;
}
/*
*/
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;
kern_return_t kr;
- kr = ipc_port_alloc(current_task()->itk_space, &name, &port);
- if (kr == KERN_SUCCESS)
+ kr = ipc_port_alloc(current_task()->itk_space, IPC_PORT_INIT_MESSAGE_QUEUE,
+ &name, &port);
+ if (kr == KERN_SUCCESS) {
ip_unlock(port);
- else
+ } else {
name = MACH_PORT_NULL;
-
+ }
return name;
}
/*
- * Routine: task_get_special_port [kernel call]
+ * Routine: thread_get_special_reply_port [mach trap]
* Purpose:
- * Clones a send right for one of the task's
- * special ports.
+ * Allocate a special reply port for the calling thread.
* Conditions:
* Nothing locked.
* Returns:
- * KERN_SUCCESS Extracted a send right.
- * KERN_INVALID_ARGUMENT The task is null.
- * KERN_FAILURE The task/space is dead.
- * KERN_INVALID_ARGUMENT Invalid special port.
+ * mach_port_name_t: send right & receive right for special reply port.
+ * MACH_PORT_NULL if there are any resource failures
+ * or other errors.
*/
-kern_return_t
-task_get_special_port(
- task_t task,
- int which,
- ipc_port_t *portp)
+mach_port_name_t
+thread_get_special_reply_port(
+ __unused struct thread_get_special_reply_port_args *args)
{
- ipc_port_t *whichp;
ipc_port_t port;
+ mach_port_name_t name;
+ kern_return_t kr;
+ thread_t thread = current_thread();
+ ipc_port_init_flags_t flags = IPC_PORT_INIT_MESSAGE_QUEUE |
+ IPC_PORT_INIT_MAKE_SEND_RIGHT | IPC_PORT_INIT_SPECIAL_REPLY;
+
+ /* unbind the thread special reply port */
+ if (IP_VALID(thread->ith_special_reply_port)) {
+ kr = ipc_port_unbind_special_reply_port(thread, TRUE);
+ if (kr != KERN_SUCCESS) {
+ return MACH_PORT_NULL;
+ }
+ }
- if (task == TASK_NULL)
- return KERN_INVALID_ARGUMENT;
+ kr = ipc_port_alloc(current_task()->itk_space, flags, &name, &port);
+ if (kr == KERN_SUCCESS) {
+ ipc_port_bind_special_reply_port_locked(port);
+ ip_unlock(port);
+ } else {
+ name = MACH_PORT_NULL;
+ }
+ return name;
+}
- switch (which) {
- case TASK_KERNEL_PORT:
- whichp = &task->itk_sself;
- break;
+/*
+ * Routine: ipc_port_bind_special_reply_port_locked
+ * Purpose:
+ * Bind the given port to current thread as a special reply port.
+ * Conditions:
+ * Port locked.
+ * Returns:
+ * None.
+ */
- case TASK_HOST_PORT:
- whichp = &task->itk_host;
- break;
+static void
+ipc_port_bind_special_reply_port_locked(
+ ipc_port_t port)
+{
+ thread_t thread = current_thread();
+ assert(thread->ith_special_reply_port == NULL);
+ assert(port->ip_specialreply);
+ assert(port->ip_sync_link_state == PORT_SYNC_LINK_ANY);
- case TASK_BOOTSTRAP_PORT:
- whichp = &task->itk_bootstrap;
+ ip_reference(port);
+ thread->ith_special_reply_port = port;
+ port->ip_messages.imq_srp_owner_thread = thread;
+
+ ipc_special_reply_port_bits_reset(port);
+}
+
+/*
+ * Routine: ipc_port_unbind_special_reply_port
+ * Purpose:
+ * Unbind the thread's special reply port.
+ * If the special port has threads waiting on turnstile,
+ * update it's inheritor.
+ * Condition:
+ * Nothing locked.
+ * Returns:
+ * None.
+ */
+static kern_return_t
+ipc_port_unbind_special_reply_port(
+ thread_t thread,
+ boolean_t unbind_active_port)
+{
+ ipc_port_t special_reply_port = thread->ith_special_reply_port;
+
+ ip_lock(special_reply_port);
+
+ /* Return error if port active and unbind_active_port set to FALSE */
+ if (unbind_active_port == FALSE && ip_active(special_reply_port)) {
+ ip_unlock(special_reply_port);
+ return KERN_FAILURE;
+ }
+
+ thread->ith_special_reply_port = NULL;
+ ipc_port_adjust_special_reply_port_locked(special_reply_port, NULL,
+ IPC_PORT_ADJUST_UNLINK_THREAD, FALSE);
+ /* port unlocked */
+
+ ip_release(special_reply_port);
+ return KERN_SUCCESS;
+}
+
+/*
+ * 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;
- case TASK_WIRED_LEDGER_PORT:
- whichp = &task->wired_ledger_port;
- 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;
+}
- case TASK_PAGED_LEDGER_PORT:
- whichp = &task->paged_ledger_port;
- break;
-
- default:
+/*
+ * Routine: task_get_special_port [kernel call]
+ * Purpose:
+ * Clones a send right for one of the task's
+ * special ports.
+ * Conditions:
+ * Nothing locked.
+ * Returns:
+ * KERN_SUCCESS Extracted a send right.
+ * KERN_INVALID_ARGUMENT The task is null.
+ * KERN_FAILURE The task/space is dead.
+ * KERN_INVALID_ARGUMENT Invalid special port.
+ */
+
+kern_return_t
+task_get_special_port(
+ task_t task,
+ int which,
+ ipc_port_t *portp)
+{
+ ipc_port_t port;
+
+ if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
}
return KERN_FAILURE;
}
- port = ipc_port_copy_send(*whichp);
+ switch (which) {
+ case TASK_KERNEL_PORT:
+ 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:
+ port = ipc_port_copy_send(task->itk_host);
+ break;
+
+ case TASK_BOOTSTRAP_PORT:
+ port = ipc_port_copy_send(task->itk_bootstrap);
+ break;
+
+ case TASK_SEATBELT_PORT:
+ port = ipc_port_copy_send(task->itk_seatbelt);
+ 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;
+
+ default:
+ itk_unlock(task);
+ return KERN_INVALID_ARGUMENT;
+ }
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
task_set_special_port(
- task_t task,
- int which,
- ipc_port_t port)
+ task_t task,
+ int which,
+ ipc_port_t port)
{
ipc_port_t *whichp;
ipc_port_t old;
- if (task == TASK_NULL)
+ if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
+
+ if (task_is_driver(current_task())) {
+ return KERN_NO_ACCESS;
+ }
switch (which) {
- case TASK_KERNEL_PORT:
+ case TASK_KERNEL_PORT:
whichp = &task->itk_sself;
break;
- case TASK_HOST_PORT:
+ case TASK_HOST_PORT:
whichp = &task->itk_host;
break;
- case TASK_BOOTSTRAP_PORT:
+ case TASK_BOOTSTRAP_PORT:
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:
+ 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);
- if (IP_VALID(old))
+ if (IP_VALID(old)) {
ipc_port_release_send(old);
+ }
return KERN_SUCCESS;
}
* 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.
*/
kern_return_t
mach_ports_register(
- task_t task,
- mach_port_array_t memory,
- mach_msg_type_number_t portsCnt)
+ task_t task,
+ mach_port_array_t memory,
+ 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;
+ }
/*
* Pad the port rights with nulls.
*/
- for (i = 0; i < portsCnt; i++)
+ for (i = 0; i < portsCnt; i++) {
ports[i] = memory[i];
- for (; i < TASK_PORT_REGISTER_MAX; i++)
+ }
+ for (; i < TASK_PORT_REGISTER_MAX; i++) {
ports[i] = IP_NULL;
+ }
itk_lock(task);
if (task->itk_self == IP_NULL) {
itk_unlock(task);
- for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
- if (IP_VALID(ports[i]))
+ for (i = 0; i < TASK_PORT_REGISTER_MAX; i++) {
+ if (IP_VALID(ports[i])) {
ipc_port_release_send(ports[i]);
+ }
+ }
/*
* Now that the operation is known to be successful,
* we can free the memory.
*/
- if (portsCnt != 0)
- kfree((vm_offset_t) memory,
- (vm_size_t) (portsCnt * sizeof(mach_port_t)));
+ if (portsCnt != 0) {
+ kfree(memory,
+ (vm_size_t) (portsCnt * sizeof(mach_port_t)));
+ }
return KERN_SUCCESS;
}
kern_return_t
mach_ports_lookup(
- task_t task,
- mach_port_array_t *portsp,
- mach_msg_type_number_t *portsCnt)
+ task_t task,
+ 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)
+ if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
size = (vm_size_t) (TASK_PORT_REGISTER_MAX * sizeof(ipc_port_t));
memory = kalloc(size);
- if (memory == 0)
+ if (memory == 0) {
return KERN_RESOURCE_SHORTAGE;
+ }
itk_lock(task);
if (task->itk_self == IP_NULL) {
* is wired, we won't fault while holding the task lock.
*/
- for (i = 0; i < TASK_PORT_REGISTER_MAX; i++)
+ for (i = 0; i < TASK_PORT_REGISTER_MAX; i++) {
ports[i] = ipc_port_copy_send(task->itk_registered[i]);
+ }
itk_unlock(task);
return KERN_SUCCESS;
}
+extern zone_t task_zone;
+
+kern_return_t
+task_conversion_eval(task_t caller, task_t victim)
+{
+ /*
+ * Tasks are allowed to resolve their own task ports, and the kernel is
+ * allowed to resolve anyone's task port.
+ */
+ if (caller == kernel_task) {
+ return KERN_SUCCESS;
+ }
+
+ if (caller == victim) {
+ return KERN_SUCCESS;
+ }
+
+ /*
+ * Only the kernel can can resolve the kernel's task port. We've established
+ * by this point that the caller is not kernel_task.
+ */
+ if (victim == TASK_NULL || victim == kernel_task) {
+ return KERN_INVALID_SECURITY;
+ }
+
+ zone_require(victim, task_zone);
+
+#if CONFIG_EMBEDDED
+ /*
+ * On embedded platforms, only a platform binary can resolve the task port
+ * of another platform binary.
+ */
+ if ((victim->t_flags & TF_PLATFORM) && !(caller->t_flags & TF_PLATFORM)) {
+#if SECURE_KERNEL
+ return KERN_INVALID_SECURITY;
+#else
+ if (cs_relax_platform_task_ports) {
+ return KERN_SUCCESS;
+ } else {
+ return KERN_INVALID_SECURITY;
+ }
+#endif /* SECURE_KERNEL */
+ }
+#endif /* CONFIG_EMBEDDED */
+
+ return KERN_SUCCESS;
+}
+
/*
* Routine: convert_port_to_locked_task
* Purpose:
task_t
convert_port_to_locked_task(ipc_port_t port)
{
+ int try_failed_count = 0;
+
while (IP_VALID(port)) {
+ task_t ct = current_task();
task_t task;
ip_lock(port);
task = (task_t) port->ip_kobject;
assert(task != TASK_NULL);
+ if (task_conversion_eval(ct, task)) {
+ ip_unlock(port);
+ return TASK_NULL;
+ }
+
/*
* Normal lock ordering puts task_lock() before ip_lock().
* Attempt out-of-order locking here.
*/
if (task_lock_try(task)) {
ip_unlock(port);
- return(task);
+ return task;
}
+ try_failed_count++;
ip_unlock(port);
- mutex_pause();
+ mutex_pause(try_failed_count);
}
return TASK_NULL;
}
+/*
+ * Routine: convert_port_to_locked_task_inspect
+ * Purpose:
+ * Internal helper routine to convert from a port to a locked
+ * task inspect right. Used by internal routines that try to convert from a
+ * task inspect port to a reference on some task related object.
+ * Conditions:
+ * Nothing locked, blocking OK.
+ */
+task_inspect_t
+convert_port_to_locked_task_inspect(ipc_port_t port)
+{
+ int try_failed_count = 0;
+
+ while (IP_VALID(port)) {
+ task_inspect_t task;
+
+ ip_lock(port);
+ if (!ip_active(port) || (ip_kotype(port) != IKOT_TASK)) {
+ ip_unlock(port);
+ return TASK_INSPECT_NULL;
+ }
+ task = (task_inspect_t)port->ip_kobject;
+ assert(task != TASK_INSPECT_NULL);
+ /*
+ * Normal lock ordering puts task_lock() before ip_lock().
+ * Attempt out-of-order locking here.
+ */
+ if (task_lock_try((task_t)task)) {
+ ip_unlock(port);
+ return task;
+ }
+ try_failed_count++;
+
+ ip_unlock(port);
+ mutex_pause(try_failed_count);
+ }
+ return TASK_INSPECT_NULL;
+}
+
+static task_t
+convert_port_to_task_locked(
+ ipc_port_t port,
+ uint32_t *exec_token)
+{
+ task_t task = TASK_NULL;
+
+ ip_lock_held(port);
+ require_ip_active(port);
+
+ if (ip_kotype(port) == IKOT_TASK) {
+ task_t ct = current_task();
+ task = (task_t)port->ip_kobject;
+ assert(task != TASK_NULL);
+
+ if (task_conversion_eval(ct, task)) {
+ return TASK_NULL;
+ }
+
+ if (exec_token) {
+ *exec_token = task->exec_token;
+ }
+ task_reference_internal(task);
+ }
+
+ return task;
+}
+
+/*
+ * Routine: convert_port_to_task_with_exec_token
+ * Purpose:
+ * Convert from a port to a task and return
+ * the exec token stored in the task.
+ * Doesn't consume the port ref; produces a task ref,
+ * which may be null.
+ * Conditions:
+ * Nothing locked.
+ */
+task_t
+convert_port_to_task_with_exec_token(
+ ipc_port_t port,
+ uint32_t *exec_token)
+{
+ task_t task = TASK_NULL;
+
+ if (IP_VALID(port)) {
+ ip_lock(port);
+ if (ip_active(port)) {
+ task = convert_port_to_task_locked(port, exec_token);
+ }
+ ip_unlock(port);
+ }
+
+ return task;
+}
+
/*
* Routine: convert_port_to_task
* Purpose:
*/
task_t
convert_port_to_task(
- ipc_port_t port)
+ ipc_port_t port)
{
- task_t task;
+ return convert_port_to_task_with_exec_token(port, NULL);
+}
- task = convert_port_to_locked_task(port);
- if (task) {
- task->ref_count++;
- task_unlock(task);
+
+/*
+ * Routine: convert_port_to_task_name
+ * Purpose:
+ * 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.
+ */
+task_name_t
+convert_port_to_task_name(
+ ipc_port_t port)
+{
+ task_name_t task = TASK_NULL;
+
+ if (IP_VALID(port)) {
+ ip_lock(port);
+
+ 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);
+
+ task_reference_internal(task);
+ }
+
+ ip_unlock(port);
+ }
+
+ return task;
+}
+
+static task_inspect_t
+convert_port_to_task_inspect_locked(
+ ipc_port_t port)
+{
+ task_inspect_t task = TASK_INSPECT_NULL;
+
+ ip_lock_held(port);
+ require_ip_active(port);
+
+ if (ip_kotype(port) == IKOT_TASK) {
+ task = (task_inspect_t)port->ip_kobject;
+ assert(task != TASK_INSPECT_NULL);
+
+ task_reference_internal(task);
+ }
+
+ return task;
+}
+
+/*
+ * Routine: convert_port_to_task_inspect
+ * Purpose:
+ * Convert from a port to a task inspection right
+ * Doesn't consume the port ref; produces a task ref,
+ * which may be null.
+ * Conditions:
+ * Nothing locked.
+ */
+task_inspect_t
+convert_port_to_task_inspect(
+ ipc_port_t port)
+{
+ task_inspect_t task = TASK_INSPECT_NULL;
+
+ if (IP_VALID(port)) {
+ ip_lock(port);
+ if (ip_active(port)) {
+ task = convert_port_to_task_inspect_locked(port);
+ }
+ ip_unlock(port);
}
+
+ return task;
+}
+
+/*
+ * Routine: convert_port_to_task_suspension_token
+ * Purpose:
+ * 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.
+ */
+task_suspension_token_t
+convert_port_to_task_suspension_token(
+ ipc_port_t port)
+{
+ task_suspension_token_t task = TASK_NULL;
+
+ if (IP_VALID(port)) {
+ ip_lock(port);
+
+ 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);
+ }
+
+ ip_unlock(port);
+ }
+
return task;
}
*/
ipc_space_t
convert_port_to_space(
- ipc_port_t port)
+ ipc_port_t port)
{
ipc_space_t space;
task_t task;
task = convert_port_to_locked_task(port);
- if (task == TASK_NULL)
+ if (task == TASK_NULL) {
return IPC_SPACE_NULL;
+ }
if (!task->active) {
task_unlock(task);
return IPC_SPACE_NULL;
}
-
+
space = task->itk_space;
is_reference(space);
task_unlock(task);
- return (space);
+ return space;
}
-upl_t
-convert_port_to_upl(
- ipc_port_t port)
+/*
+ * Routine: convert_port_to_space_inspect
+ * Purpose:
+ * Convert from a port to a space inspect right.
+ * Doesn't consume the port ref; produces a space inspect ref,
+ * which may be null.
+ * Conditions:
+ * Nothing locked.
+ */
+ipc_space_inspect_t
+convert_port_to_space_inspect(
+ ipc_port_t port)
{
- upl_t upl;
+ ipc_space_inspect_t space;
+ task_inspect_t task;
- ip_lock(port);
- if (!ip_active(port) || (ip_kotype(port) != IKOT_UPL)) {
- ip_unlock(port);
- return (upl_t)NULL;
- }
- upl = (upl_t) port->ip_kobject;
- ip_unlock(port);
- upl_lock(upl);
- upl->ref_count+=1;
- upl_unlock(upl);
- return upl;
-}
+ task = convert_port_to_locked_task_inspect(port);
-mach_port_t
-convert_upl_to_port(
- upl_t upl)
-{
- return MACH_PORT_NULL;
-}
+ if (task == TASK_INSPECT_NULL) {
+ return IPC_SPACE_INSPECT_NULL;
+ }
-__private_extern__ void
-upl_no_senders(
- upl_t upl,
- mach_port_mscount_t mscount)
-{
- return;
+ if (!task->active) {
+ task_unlock(task);
+ return IPC_SPACE_INSPECT_NULL;
+ }
+
+ space = (ipc_space_inspect_t)task->itk_space;
+ is_reference((ipc_space_t)space);
+ task_unlock((task_t)task);
+ return space;
}
/*
- * Routine: convert_port_entry_to_map
+ * Routine: convert_port_to_map
* 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 map.
+ * Doesn't consume the port ref; produces a map ref,
+ * which may be null.
* Conditions:
* Nothing locked.
*/
-
vm_map_t
-convert_port_entry_to_map(
- ipc_port_t port)
+convert_port_to_map(
+ 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 = convert_port_to_locked_task(port);
-
- if (task == TASK_NULL)
- return VM_MAP_NULL;
+ task = convert_port_to_locked_task(port);
+
+ if (task == TASK_NULL) {
+ return VM_MAP_NULL;
+ }
- if (!task->active) {
- task_unlock(task);
- return VM_MAP_NULL;
- }
-
- map = task->map;
- vm_map_reference_swap(map);
+ if (!task->active) {
task_unlock(task);
+ return VM_MAP_NULL;
}
+ map = task->map;
+ vm_map_reference_swap(map);
+ task_unlock(task);
return map;
}
+
/*
- * Routine: convert_port_entry_to_object
+ * Routine: convert_port_to_thread
* 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 thread.
+ * Doesn't consume the port ref; produces an thread ref,
+ * which may be null.
* Conditions:
* Nothing locked.
*/
-
-vm_object_t
-convert_port_entry_to_object(
- ipc_port_t port)
+static thread_t
+convert_port_to_thread_locked(
+ ipc_port_t port,
+ port_to_thread_options_t options)
{
- 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;
+ thread_t thread = THREAD_NULL;
+
+ ip_lock_held(port);
+ require_ip_active(port);
+
+ if (ip_kotype(port) == IKOT_THREAD) {
+ thread = (thread_t)port->ip_kobject;
+ assert(thread != THREAD_NULL);
+
+ if (options & PORT_TO_THREAD_NOT_CURRENT_THREAD) {
+ if (thread == current_thread()) {
+ return THREAD_NULL;
}
- else
- return (vm_object_t)NULL;
}
- } else {
- return (vm_object_t)NULL;
+
+ if (options & PORT_TO_THREAD_IN_CURRENT_TASK) {
+ if (thread->task != current_task()) {
+ return THREAD_NULL;
+ }
+ } else {
+ /* Use task conversion rules for thread control conversions */
+ if (task_conversion_eval(current_task(), thread->task) != KERN_SUCCESS) {
+ return THREAD_NULL;
+ }
+ }
+
+ thread_reference_internal(thread);
}
- return object;
+ return thread;
+}
+
+thread_t
+convert_port_to_thread(
+ ipc_port_t port)
+{
+ thread_t thread = THREAD_NULL;
+
+ if (IP_VALID(port)) {
+ ip_lock(port);
+ if (ip_active(port)) {
+ thread = convert_port_to_thread_locked(port, PORT_TO_THREAD_NONE);
+ }
+ ip_unlock(port);
+ }
+
+ return thread;
}
/*
- * Routine: convert_port_to_map
+ * Routine: convert_port_to_thread_inspect
* Purpose:
- * Convert from a port to a map.
- * Doesn't consume the port ref; produces a map ref,
+ * Convert from a port to a thread inspection right
+ * Doesn't consume the port ref; produces a thread ref,
* which may be null.
* Conditions:
* Nothing locked.
*/
+thread_inspect_t
+convert_port_to_thread_inspect(
+ ipc_port_t port)
+{
+ thread_inspect_t thread = THREAD_INSPECT_NULL;
-vm_map_t
-convert_port_to_map(
- ipc_port_t port)
+ if (IP_VALID(port)) {
+ ip_lock(port);
+
+ if (ip_active(port) &&
+ ip_kotype(port) == IKOT_THREAD) {
+ thread = (thread_inspect_t)port->ip_kobject;
+ assert(thread != THREAD_INSPECT_NULL);
+ thread_reference_internal((thread_t)thread);
+ }
+ ip_unlock(port);
+ }
+
+ return thread;
+}
+
+/*
+ * Routine: convert_thread_inspect_to_port
+ * Purpose:
+ * Convert from a thread inspect reference to a port.
+ * Consumes a thread ref;
+ * As we never export thread inspect ports, always
+ * creates a NULL port.
+ * Conditions:
+ * Nothing locked.
+ */
+
+ipc_port_t
+convert_thread_inspect_to_port(thread_inspect_t thread)
{
- task_t task;
- vm_map_t map;
+ thread_deallocate(thread);
+ return IP_NULL;
+}
- task = convert_port_to_locked_task(port);
-
- if (task == TASK_NULL)
- return VM_MAP_NULL;
- if (!task->active) {
- task_unlock(task);
- return VM_MAP_NULL;
+/*
+ * Routine: port_name_to_thread
+ * Purpose:
+ * 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_t
+port_name_to_thread(
+ mach_port_name_t name,
+ port_to_thread_options_t options)
+{
+ thread_t thread = THREAD_NULL;
+ ipc_port_t kport;
+ kern_return_t kr;
+
+ if (MACH_PORT_VALID(name)) {
+ kr = ipc_port_translate_send(current_space(), name, &kport);
+ if (kr == KERN_SUCCESS) {
+ thread = convert_port_to_thread_locked(kport, options);
+ ip_unlock(kport);
+ }
}
-
- map = task->map;
- vm_map_reference_swap(map);
- task_unlock(task);
- return map;
+
+ return thread;
+}
+
+task_t
+port_name_to_task(
+ mach_port_name_t name)
+{
+ ipc_port_t kport;
+ kern_return_t kr;
+ task_t task = TASK_NULL;
+
+ if (MACH_PORT_VALID(name)) {
+ kr = ipc_port_translate_send(current_space(), name, &kport);
+ if (kr == KERN_SUCCESS) {
+ task = convert_port_to_task_locked(kport, NULL);
+ ip_unlock(kport);
+ }
+ }
+ return task;
}
+task_inspect_t
+port_name_to_task_inspect(
+ mach_port_name_t name)
+{
+ ipc_port_t kport;
+ kern_return_t kr;
+ task_inspect_t ti = TASK_INSPECT_NULL;
+
+ if (MACH_PORT_VALID(name)) {
+ kr = ipc_port_translate_send(current_space(), name, &kport);
+ if (kr == KERN_SUCCESS) {
+ ti = convert_port_to_task_inspect_locked(kport);
+ ip_unlock(kport);
+ }
+ }
+ return ti;
+}
/*
- * Routine: convert_port_to_act
+ * Routine: port_name_to_host
* Purpose:
- * Convert from a port to a thr_act.
- * Doesn't consume the port ref; produces an thr_act ref,
- * which may be null.
+ * Convert from a port name to a host pointer.
+ * NOTE: This does _not_ return a +1 reference to the host_t
* Conditions:
* Nothing locked.
*/
-
-thread_act_t
-convert_port_to_act( ipc_port_t port )
+host_t
+port_name_to_host(
+ mach_port_name_t name)
{
- boolean_t r;
- thread_act_t thr_act = 0;
+ host_t host = HOST_NULL;
+ kern_return_t kr;
+ ipc_port_t port;
- r = FALSE;
- while (!r && IP_VALID(port)) {
- ip_lock(port);
- r = ref_act_port_locked(port, &thr_act);
- /* port unlocked */
+ if (MACH_PORT_VALID(name)) {
+ kr = ipc_port_translate_send(current_space(), name, &port);
+ if (kr == KERN_SUCCESS) {
+ host = convert_port_to_host(port);
+ ip_unlock(port);
+ }
}
- return (thr_act);
+ return host;
}
-boolean_t
-ref_act_port_locked( ipc_port_t port, thread_act_t *pthr_act )
+/*
+ * Routine: convert_task_to_port
+ * Purpose:
+ * Convert from a task to a port.
+ * Consumes a task ref; produces a naked send right
+ * which may be invalid.
+ * Conditions:
+ * Nothing locked.
+ */
+
+ipc_port_t
+convert_task_to_port(
+ task_t task)
{
- thread_act_t thr_act;
+ ipc_port_t port;
- 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);
+ itk_lock(task);
- /*
- * 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);
- }
- act_locked_act_reference(thr_act);
- act_unlock(thr_act);
+ if (task->itk_self != IP_NULL) {
+ port = ipc_port_make_send(task->itk_self);
+ } else {
+ port = IP_NULL;
}
- *pthr_act = thr_act;
- ip_unlock(port);
- return (TRUE);
+
+ itk_unlock(task);
+
+ task_deallocate(task);
+ return port;
}
/*
- * Routine: port_name_to_act
+ * Routine: convert_task_inspect_to_port
* 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 task inspect reference to a port.
+ * Consumes a task ref;
+ * As we never export task inspect ports, always
+ * creates a NULL port.
* Conditions:
* Nothing locked.
*/
-thread_act_t
-port_name_to_act(
- mach_port_name_t name)
+ipc_port_t
+convert_task_inspect_to_port(
+ task_inspect_t task)
{
- thread_act_t thr_act = THR_ACT_NULL;
- ipc_port_t kern_port;
- kern_return_t kr;
+ task_deallocate(task);
- 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;
-
- thr_act = convert_port_to_act(kern_port);
-
- if (IP_VALID(kern_port))
- ipc_port_release_send(kern_port);
- }
- return thr_act;
+ return IP_NULL;
}
-task_t
-port_name_to_task(
- mach_port_name_t name)
+/*
+ * Routine: convert_task_suspend_token_to_port
+ * Purpose:
+ * 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 kern_port;
- kern_return_t kr;
- task_t task = TASK_NULL;
-
- 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 TASK_NULL;
+ ipc_port_t port;
- task = convert_port_to_task(kern_port);
+ task_lock(task);
+ if (task->active) {
+ if (task->itk_resume == IP_NULL) {
+ task->itk_resume = ipc_kobject_alloc_port((ipc_kobject_t) task,
+ IKOT_TASK_RESUME, IPC_KOBJECT_ALLOC_NONE);
+ }
- if (IP_VALID(kern_port))
- ipc_port_release_send(kern_port);
+ /*
+ * 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;
}
- return task;
+
+ task_unlock(task);
+ task_suspension_token_deallocate(task);
+
+ return port;
}
+
/*
- * Routine: convert_task_to_port
+ * Routine: convert_task_name_to_port
* Purpose:
- * Convert from a task to a port.
- * Consumes a task ref; produces a naked send right
- * which may be invalid.
+ * 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_task_to_port(
- task_t task)
+convert_task_name_to_port(
+ task_name_t task_name)
{
ipc_port_t port;
- 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
+ itk_lock(task_name);
+ if (task_name->itk_nself != IP_NULL) {
+ port = ipc_port_make_send(task_name->itk_nself);
+ } else {
port = IP_NULL;
- itk_unlock(task);
+ }
+ itk_unlock(task_name);
- task_deallocate(task);
+ task_name_deallocate(task_name);
return port;
}
/*
- * Routine: convert_act_to_port
+ * Routine: convert_thread_to_port
* Purpose:
- * Convert from a thr_act to a port.
- * Consumes an thr_act ref; produces a naked send right
+ * 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_act_to_port(thr_act)
- thread_act_t thr_act;
+convert_thread_to_port(
+ thread_t thread)
{
- ipc_port_t port;
+ ipc_port_t port;
- act_lock(thr_act);
- if (thr_act->ith_self != IP_NULL)
- port = ipc_port_make_send(thr_act->ith_self);
- else
+ thread_mtx_lock(thread);
+
+ if (thread->ith_self != IP_NULL) {
+ port = ipc_port_make_send(thread->ith_self);
+ } else {
port = IP_NULL;
- act_unlock(thr_act);
+ }
+
+ thread_mtx_unlock(thread);
+
+ thread_deallocate(thread);
- act_deallocate(thr_act);
return port;
}
void
space_deallocate(
- ipc_space_t space)
+ ipc_space_t space)
{
- if (space != IS_NULL)
+ if (space != IS_NULL) {
is_release(space);
+ }
+}
+
+/*
+ * Routine: space_inspect_deallocate
+ * Purpose:
+ * Deallocate a space inspect ref produced by convert_port_to_space_inspect.
+ * Conditions:
+ * Nothing locked.
+ */
+
+void
+space_inspect_deallocate(
+ ipc_space_inspect_t space)
+{
+ if (space != IS_INSPECT_NULL) {
+ is_release((ipc_space_t)space);
+ }
}
/*
kern_return_t
thread_set_exception_ports(
- thread_act_t thr_act,
- exception_mask_t exception_mask,
- ipc_port_t new_port,
- exception_behavior_t new_behavior,
- thread_state_flavor_t new_flavor)
+ thread_t thread,
+ exception_mask_t exception_mask,
+ ipc_port_t new_port,
+ exception_behavior_t new_behavior,
+ thread_state_flavor_t new_flavor)
{
- register int i;
- 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;
+ register int i;
- if (!thr_act)
+#if CONFIG_MACF
+ struct label *new_label;
+#endif
+
+ if (thread == THREAD_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if (exception_mask & ~EXC_MASK_ALL)
+ if (exception_mask & ~EXC_MASK_VALID) {
return KERN_INVALID_ARGUMENT;
+ }
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_MASK) {
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
return KERN_INVALID_ARGUMENT;
}
}
- /*
+ /*
* 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 (!VALID_THREAD_STATE_FLAVOR(new_flavor)) {
+ 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);
+#if CONFIG_MACF
+ new_label = mac_exc_create_label_for_current_proc();
+#endif
+
+ thread_mtx_lock(thread);
+
+ if (!thread->active) {
+ thread_mtx_unlock(thread);
+
return KERN_FAILURE;
}
- 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
+ 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))
+#if CONFIG_MACF
+ && mac_exc_update_action_label(&thread->exc_actions[i], new_label) == 0
+#endif
+ ) {
+ 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++)
- if (IP_VALID(old_port[i]))
+ }
+ }
+
+ thread_mtx_unlock(thread);
+
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
+
+ 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 */
+ }
+ }
+
+ 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,
- exception_mask_t exception_mask,
- ipc_port_t new_port,
- exception_behavior_t new_behavior,
- thread_state_flavor_t new_flavor)
+ task_t task,
+ exception_mask_t exception_mask,
+ ipc_port_t new_port,
+ exception_behavior_t new_behavior,
+ thread_state_flavor_t new_flavor)
{
- register int i;
- 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;
+ register int i;
+
+#if CONFIG_MACF
+ struct label *new_label;
+#endif
if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
}
- if (exception_mask & ~EXC_MASK_ALL) {
+ if (exception_mask & ~EXC_MASK_VALID) {
return KERN_INVALID_ARGUMENT;
}
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_MASK) {
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
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;
+ }
+
+#if CONFIG_MACF
+ new_label = mac_exc_create_label_for_current_proc();
+#endif
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
- if (exception_mask & (1 << i)) {
+ itk_lock(task);
+
+ 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))
+#if CONFIG_MACF
+ && mac_exc_update_action_label(&task->exc_actions[i], new_label) == 0
+#endif
+ ) {
old_port[i] = task->exc_actions[i].port;
task->exc_actions[i].port =
- ipc_port_copy_send(new_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++)
- if (IP_VALID(old_port[i]))
+ itk_unlock(task);
+
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
+
+ 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 */
+ }
+ }
+
+ 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,
- exception_behavior_t new_behavior,
- thread_state_flavor_t new_flavor,
- exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
- exception_port_array_t ports,
+ 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,
+ exception_port_array_t ports,
exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ 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)
+#if CONFIG_MACF
+ struct label *new_label;
+#endif
+
+ if (thread == THREAD_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if (exception_mask & ~EXC_MASK_ALL) {
+ if (exception_mask & ~EXC_MASK_VALID) {
return KERN_INVALID_ARGUMENT;
}
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_MASK) {
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
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);
+ if (new_flavor != 0 && !VALID_THREAD_STATE_FLAVOR(new_flavor)) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+#if CONFIG_MACF
+ new_label = mac_exc_create_label_for_current_proc();
+#endif
+
+ 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++) {
- 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])
- {
+ assert(EXC_TYPES_COUNT > FIRST_EXCEPTION);
+ for (count = 0, i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT && count < *CountCnt; ++i) {
+ if ((exception_mask & (1 << i))
+#if CONFIG_MACF
+ && mac_exc_update_action_label(&thread->exc_actions[i], new_label) == 0
+#endif
+ ) {
+ 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++)
- if (IP_VALID(old_port[i]))
+ thread_mtx_unlock(thread);
+
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
+
+ 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 */
+ }
+ }
+
+ if (IP_VALID(new_port)) { /* consume send right */
ipc_port_release_send(new_port);
+ }
+
*CountCnt = count;
+
return KERN_SUCCESS;
-}/* thread_swap_exception_ports */
+}
kern_return_t
task_swap_exception_ports(
- 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,
- exception_port_array_t ports,
+ 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,
+ exception_port_array_t ports,
exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ 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 CONFIG_MACF
+ struct label *new_label;
+#endif
- if (task == TASK_NULL)
+ if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if (exception_mask & ~EXC_MASK_ALL) {
+ if (exception_mask & ~EXC_MASK_VALID) {
return KERN_INVALID_ARGUMENT;
}
if (IP_VALID(new_port)) {
- switch (new_behavior) {
+ switch (new_behavior & ~MACH_EXCEPTION_MASK) {
case EXCEPTION_DEFAULT:
case EXCEPTION_STATE:
case EXCEPTION_STATE_IDENTITY:
break;
+
default:
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;
+ }
+
+#if CONFIG_MACF
+ new_label = mac_exc_create_label_for_current_proc();
+#endif
itk_lock(task);
+
if (task->itk_self == IP_NULL) {
itk_unlock(task);
+
return KERN_FAILURE;
}
- count = 0;
-
- for (i = FIRST_EXCEPTION; i < EXC_TYPES_COUNT; i++) {
- if (exception_mask & (1 << 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))
+#if CONFIG_MACF
+ && mac_exc_update_action_label(&task->exc_actions[i], new_label) == 0
+#endif
+ ) {
for (j = 0; j < count; j++) {
-/*
- * search for an identical entry, if found
- * set corresponding mask for this exception.
- */
+ /*
+ * 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])
- {
+ 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++)
- if (IP_VALID(old_port[i]))
+
+#if CONFIG_MACF
+ mac_exc_free_label(new_label);
+#endif
+
+ 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 */
+ }
+ }
+
+ if (IP_VALID(new_port)) { /* consume send right */
ipc_port_release_send(new_port);
+ }
+
*CountCnt = count;
return KERN_SUCCESS;
-}/* task_swap_exception_ports */
+}
/*
* 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,
- exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
- exception_port_array_t ports,
+ thread_t thread,
+ exception_mask_t exception_mask,
+ exception_mask_array_t masks,
+ mach_msg_type_number_t *CountCnt,
+ exception_port_array_t ports,
exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
+ unsigned int i, j, count;
- if (!thr_act)
+ if (thread == THREAD_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if (exception_mask & ~EXC_MASK_ALL) {
+ if (exception_mask & ~EXC_MASK_VALID) {
return KERN_INVALID_ARGUMENT;
}
- act_lock(thr_act);
- if (!thr_act->active) {
- act_unlock(thr_act);
+ 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++;
+ 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 */
+}
kern_return_t
task_get_exception_ports(
- task_t task,
- exception_mask_t exception_mask,
- exception_mask_array_t masks,
- mach_msg_type_number_t * CountCnt,
- exception_port_array_t ports,
+ task_t task,
+ exception_mask_t exception_mask,
+ exception_mask_array_t masks,
+ mach_msg_type_number_t *CountCnt,
+ exception_port_array_t ports,
exception_behavior_array_t behaviors,
- thread_state_flavor_array_t flavors )
+ thread_state_flavor_array_t flavors)
{
- register int i,
- j,
- count;
+ unsigned int i, j, count;
- if (task == TASK_NULL)
+ if (task == TASK_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if (exception_mask & ~EXC_MASK_ALL) {
+ 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;
}
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.
- */
+ 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])
- {
+ 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;
if (count > *CountCnt) {
break;
}
}
}
- }/* for */
+ }
itk_unlock(task);
*CountCnt = count;
+
return KERN_SUCCESS;
-}/* task_get_exception_ports */
+}
projects / apple / xnu.git / blobdiff