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 Software.Distribution@CS.CMU.EDU
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
61extern zone_t ads_zone;
62
63kern_return_t
64machine_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_legacy_debug_state_t *tstate = (arm_legacy_debug_state_t *) state;
74 if (task_has_64Bit_data(task) ||
75 (state_count != ARM_LEGACY_DEBUG_STATE_COUNT) ||
76 (!debug_legacy_state_is_valid(tstate))) {
77 return KERN_INVALID_ARGUMENT;
78 }
79
80 if (task->task_debug == NULL) {
81 task->task_debug = zalloc(ads_zone);
82 if (task->task_debug == NULL)
83 return KERN_FAILURE;
84 }
85
86 copy_legacy_debug_state(tstate, (arm_legacy_debug_state_t *) task->task_debug, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
87
88 return KERN_SUCCESS;
89 }
90 case ARM_DEBUG_STATE32:
91 {
92 arm_debug_state32_t *tstate = (arm_debug_state32_t *) state;
93 if (task_has_64Bit_data(task) ||
94 (state_count != ARM_DEBUG_STATE32_COUNT) ||
95 (!debug_state_is_valid32(tstate))) {
96 return KERN_INVALID_ARGUMENT;
97 }
98
99 if (task->task_debug == NULL) {
100 task->task_debug = zalloc(ads_zone);
101 if (task->task_debug == NULL)
102 return KERN_FAILURE;
103 }
104
105 copy_debug_state32(tstate, (arm_debug_state32_t *) task->task_debug, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
106
107 return KERN_SUCCESS;
108 }
109 case ARM_DEBUG_STATE64:
110 {
111 arm_debug_state64_t *tstate = (arm_debug_state64_t *) state;
112
113 if ((!task_has_64Bit_data(task)) ||
114 (state_count != ARM_DEBUG_STATE64_COUNT) ||
115 (!debug_state_is_valid64(tstate))) {
116 return KERN_INVALID_ARGUMENT;
117 }
118
119 if (task->task_debug == NULL) {
120 task->task_debug = zalloc(ads_zone);
121 if (task->task_debug == NULL)
122 return KERN_FAILURE;
123 }
124
125 copy_debug_state64(tstate, (arm_debug_state64_t *) task->task_debug, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
126
127 return KERN_SUCCESS;
128 }
129 case THREAD_STATE_NONE: /* Using this flavor to clear task_debug */
130 {
131 if (task->task_debug != NULL) {
132 zfree(ads_zone, task->task_debug);
133 task->task_debug = NULL;
134
135 return KERN_SUCCESS;
136 }
137 return KERN_FAILURE;
138 }
139 default:
140 {
141 return KERN_INVALID_ARGUMENT;
142 }
143 }
144
145 return KERN_FAILURE;
146}
147
148kern_return_t
149machine_task_get_state(task_t task,
150 int flavor,
151 thread_state_t state,
152 mach_msg_type_number_t *state_count)
153{
154 switch (flavor) {
155 case ARM_DEBUG_STATE:
156 {
157 arm_legacy_debug_state_t *tstate = (arm_legacy_debug_state_t *) state;
158
159 if (task_has_64Bit_data(task) || (*state_count != ARM_LEGACY_DEBUG_STATE_COUNT)) {
160 return KERN_INVALID_ARGUMENT;
161 }
162
163 if (task->task_debug == NULL) {
164 bzero(state, sizeof(*tstate));
165 } else {
166 copy_legacy_debug_state((arm_legacy_debug_state_t*) task->task_debug, tstate, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
167 }
168
169 return KERN_SUCCESS;
170 }
171 case ARM_DEBUG_STATE32:
172 {
173 arm_debug_state32_t *tstate = (arm_debug_state32_t *) state;
174
175 if (task_has_64Bit_data(task) || (*state_count != ARM_DEBUG_STATE32_COUNT)) {
176 return KERN_INVALID_ARGUMENT;
177 }
178
179 if (task->task_debug == NULL) {
180 bzero(state, sizeof(*tstate));
181 } else {
182 copy_debug_state32((arm_debug_state32_t*) task->task_debug, tstate, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
183 }
184
185 return KERN_SUCCESS;
186 }
187 case ARM_DEBUG_STATE64:
188 {
189 arm_debug_state64_t *tstate = (arm_debug_state64_t *) state;
190
191 if ((!task_has_64Bit_data(task)) || (*state_count != ARM_DEBUG_STATE64_COUNT)) {
192 return KERN_INVALID_ARGUMENT;
193 }
194
195 if (task->task_debug == NULL) {
196 bzero(state, sizeof(*tstate));
197 } else {
198 copy_debug_state64((arm_debug_state64_t*) task->task_debug, tstate, FALSE); /* FALSE OR TRUE doesn't matter since we are ignoring it for arm */
199 }
200
201 return KERN_SUCCESS;
202 }
203 default:
204 {
205 return KERN_INVALID_ARGUMENT;
206 }
207
208 }
209 return KERN_FAILURE;
210}
211
212void
213machine_task_terminate(task_t task)
214{
215 if (task) {
216 void *task_debug;
217
218 task_debug = task->task_debug;
219 if (task_debug != NULL) {
220 task->task_debug = NULL;
221 zfree(ads_zone, task_debug);
222 }
223 }
224}
225
226
227kern_return_t
228machine_thread_inherit_taskwide(
229 thread_t thread,
230 task_t parent_task)
231{
232 if (parent_task->task_debug) {
233 int flavor;
234 mach_msg_type_number_t count;
235
236 flavor = task_has_64Bit_data(parent_task) ? ARM_DEBUG_STATE64 : ARM_DEBUG_STATE32;
237 count = task_has_64Bit_data(parent_task) ? ARM_DEBUG_STATE64_COUNT : ARM_DEBUG_STATE32_COUNT;
238
239 return machine_thread_set_state(thread, flavor, parent_task->task_debug, count);
240 }
241
242 return KERN_SUCCESS;
243}
244
245
246void
247machine_task_init(__unused task_t new_task,
248 __unused task_t parent_task,
249 __unused boolean_t memory_inherit)
250{
251}
252