1 /*
2 * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * @OSF_COPYRIGHT@
30 */
31 /*
32 * Mach Operating System
33 * Copyright (c) 1991,1990 Carnegie Mellon University
34 * All Rights Reserved.
35 *
36 * Permission to use, copy, modify and distribute this software and its
37 * documentation is hereby granted, provided that both the copyright
38 * notice and this permission notice appear in all copies of the
39 * software, derivative works or modified versions, and any portions
40 * thereof, and that both notices appear in supporting documentation.
41 *
42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
45 *
46 * Carnegie Mellon requests users of this software to return to
47 *
48 * Software Distribution Coordinator or [email protected]
49 * School of Computer Science
50 * Carnegie Mellon University
51 * Pittsburgh PA 15213-3890
52 *
53 * any improvements or extensions that they make and grant Carnegie Mellon
54 * the rights to redistribute these changes.
55 */
56
57 #include <kern/task.h>
58 #include <kern/thread.h>
59 #include <arm/misc_protos.h>
60
61 extern zone_t ads_zone;
62
63 kern_return_t
machine_task_set_state(task_t task,int flavor,thread_state_t state,mach_msg_type_number_t state_count)64 machine_task_set_state(
65 task_t task,
66 int flavor,
67 thread_state_t state,
68 mach_msg_type_number_t state_count)
69 {
70 switch (flavor) {
71 case ARM_DEBUG_STATE:
72 {
73 arm_debug_state_t *tstate = (arm_debug_state_t *) state;
74
75 if (state_count != ARM_DEBUG_STATE_COUNT) {
76 return KERN_INVALID_ARGUMENT;
77 }
78
79 if (task->task_debug == NULL) {
80 task->task_debug = zalloc_flags(ads_zone,
81 Z_WAITOK | Z_NOFAIL);
82 }
83
84 copy_debug_state(tstate, (arm_debug_state_t*) task->task_debug, FALSE);
85
86 return KERN_SUCCESS;
87 }
88 case THREAD_STATE_NONE: /* Using this flavor to clear task_debug */
89 {
90 if (task->task_debug != NULL) {
91 zfree(ads_zone, task->task_debug);
92 task->task_debug = NULL;
93
94 return KERN_SUCCESS;
95 }
96 return KERN_FAILURE;
97 }
98 default:
99 {
100 return KERN_INVALID_ARGUMENT;
101 }
102 }
103
104 return KERN_FAILURE;
105 }
106
107 kern_return_t
machine_task_get_state(task_t task,int flavor,thread_state_t state,mach_msg_type_number_t * state_count)108 machine_task_get_state(task_t task,
109 int flavor,
110 thread_state_t state,
111 mach_msg_type_number_t *state_count)
112 {
113 switch (flavor) {
114 case ARM_DEBUG_STATE:
115 {
116 arm_debug_state_t *tstate = (arm_debug_state_t *) state;
117
118 if (*state_count != ARM_DEBUG_STATE_COUNT) {
119 return KERN_INVALID_ARGUMENT;
120 }
121
122 if (task->task_debug == NULL) {
123 bzero(state, sizeof(*tstate));
124 } else {
125 copy_debug_state((arm_debug_state_t*) task->task_debug, tstate, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
126 }
127
128 return KERN_SUCCESS;
129 }
130 default:
131 {
132 return KERN_INVALID_ARGUMENT;
133 }
134 }
135 return KERN_FAILURE;
136 }
137
138 void
machine_task_terminate(task_t task)139 machine_task_terminate(task_t task)
140 {
141 if (task) {
142 void *task_debug;
143
144 task_debug = task->task_debug;
145 if (task_debug != NULL) {
146 task->task_debug = NULL;
147 zfree(ads_zone, task_debug);
148 }
149 }
150 }
151
152
153 kern_return_t
machine_thread_inherit_taskwide(thread_t thread,task_t parent_task)154 machine_thread_inherit_taskwide(
155 thread_t thread,
156 task_t parent_task)
157 {
158 if (parent_task->task_debug) {
159 int flavor;
160 mach_msg_type_number_t count;
161
162 flavor = ARM_DEBUG_STATE;
163 count = ARM_DEBUG_STATE_COUNT;
164
165 return machine_thread_set_state(thread, flavor, parent_task->task_debug, count);
166 }
167
168 return KERN_SUCCESS;
169 }
170
171
172 void
machine_task_init(__unused task_t new_task,__unused task_t parent_task,__unused boolean_t memory_inherit)173 machine_task_init(__unused task_t new_task,
174 __unused task_t parent_task,
175 __unused boolean_t memory_inherit)
176 {
177 }
178