osfmk/arm64/machine_task.c

   1 /*
   2  * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
   3  *
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   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
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   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  *
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  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  23  * Please see the License for the specific language governing rights and
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  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
  61
  62 extern zone_t ads_zone;
  63
  64 kern_return_t
  65 machine_task_set_state(
  66         task_t task,
  67         int flavor,
  68         thread_state_t state,
  69         mach_msg_type_number_t state_count)
  70 {
  71         switch (flavor) {
  72         case ARM_DEBUG_STATE:
  73         {
  74                 arm_legacy_debug_state_t *tstate = (arm_legacy_debug_state_t *) state;
  75                 if (task_has_64Bit_data(task) ||
  76                     (state_count != ARM_LEGACY_DEBUG_STATE_COUNT) ||
  77                     (!debug_legacy_state_is_valid(tstate))) {
  78                         return KERN_INVALID_ARGUMENT;
  79                 }
  80
  81                 if (task->task_debug == NULL) {
  82                         task->task_debug = zalloc(ads_zone);
  83                         if (task->task_debug == NULL) {
  84                                 return KERN_FAILURE;
  85                         }
  86                 }
  87
  88                 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 */
  89
  90                 return KERN_SUCCESS;
  91         }
  92         case ARM_DEBUG_STATE32:
  93         {
  94                 arm_debug_state32_t *tstate = (arm_debug_state32_t *) state;
  95                 if (task_has_64Bit_data(task) ||
  96                     (state_count != ARM_DEBUG_STATE32_COUNT) ||
  97                     (!debug_state_is_valid32(tstate))) {
  98                         return KERN_INVALID_ARGUMENT;
  99                 }
 100
 101                 if (task->task_debug == NULL) {
 102                         task->task_debug = zalloc(ads_zone);
 103                         if (task->task_debug == NULL) {
 104                                 return KERN_FAILURE;
 105                         }
 106                 }
 107
 108                 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 */
 109
 110                 return KERN_SUCCESS;
 111         }
 112         case ARM_DEBUG_STATE64:
 113         {
 114                 arm_debug_state64_t *tstate = (arm_debug_state64_t *) state;
 115
 116                 if ((!task_has_64Bit_data(task)) ||
 117                     (state_count != ARM_DEBUG_STATE64_COUNT) ||
 118                     (!debug_state_is_valid64(tstate))) {
 119                         return KERN_INVALID_ARGUMENT;
 120                 }
 121
 122                 if (task->task_debug == NULL) {
 123                         task->task_debug = zalloc(ads_zone);
 124                         if (task->task_debug == NULL) {
 125                                 return KERN_FAILURE;
 126                         }
 127                 }
 128
 129                 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 */
 130
 131                 return KERN_SUCCESS;
 132         }
 133         case THREAD_STATE_NONE:         /* Using this flavor to clear task_debug */
 134         {
 135                 if (task->task_debug != NULL) {
 136                         zfree(ads_zone, task->task_debug);
 137                         task->task_debug = NULL;
 138
 139                         return KERN_SUCCESS;
 140                 }
 141                 return KERN_FAILURE;
 142         }
 143         default:
 144         {
 145                 return KERN_INVALID_ARGUMENT;
 146         }
 147         }
 148
 149         return KERN_FAILURE;
 150 }
 151
 152 kern_return_t
 153 machine_task_get_state(task_t task,
 154     int flavor,
 155     thread_state_t state,
 156     mach_msg_type_number_t *state_count)
 157 {
 158         switch (flavor) {
 159         case ARM_DEBUG_STATE:
 160         {
 161                 arm_legacy_debug_state_t *tstate = (arm_legacy_debug_state_t *) state;
 162
 163                 if (task_has_64Bit_data(task) || (*state_count != ARM_LEGACY_DEBUG_STATE_COUNT)) {
 164                         return KERN_INVALID_ARGUMENT;
 165                 }
 166
 167                 if (task->task_debug == NULL) {
 168                         bzero(state, sizeof(*tstate));
 169                 } else {
 170                         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 */
 171                 }
 172
 173                 return KERN_SUCCESS;
 174         }
 175         case ARM_DEBUG_STATE32:
 176         {
 177                 arm_debug_state32_t *tstate = (arm_debug_state32_t *) state;
 178
 179                 if (task_has_64Bit_data(task) || (*state_count != ARM_DEBUG_STATE32_COUNT)) {
 180                         return KERN_INVALID_ARGUMENT;
 181                 }
 182
 183                 if (task->task_debug == NULL) {
 184                         bzero(state, sizeof(*tstate));
 185                 } else {
 186                         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 */
 187                 }
 188
 189                 return KERN_SUCCESS;
 190         }
 191         case ARM_DEBUG_STATE64:
 192         {
 193                 arm_debug_state64_t *tstate = (arm_debug_state64_t *) state;
 194
 195                 if ((!task_has_64Bit_data(task)) || (*state_count != ARM_DEBUG_STATE64_COUNT)) {
 196                         return KERN_INVALID_ARGUMENT;
 197                 }
 198
 199                 if (task->task_debug == NULL) {
 200                         bzero(state, sizeof(*tstate));
 201                 } else {
 202                         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 */
 203                 }
 204
 205                 return KERN_SUCCESS;
 206         }
 207         default:
 208         {
 209                 return KERN_INVALID_ARGUMENT;
 210         }
 211         }
 212         return KERN_FAILURE;
 213 }
 214
 215 void
 216 machine_task_terminate(task_t task)
 217 {
 218         if (task) {
 219                 void *task_debug;
 220                 task_debug = task->task_debug;
 221                 if (task_debug != NULL) {
 222                         task->task_debug = NULL;
 223                         zfree(ads_zone, task_debug);
 224                 }
 225         }
 226 }
 227
 228
 229 kern_return_t
 230 machine_thread_inherit_taskwide(
 231         thread_t thread,
 232         task_t parent_task)
 233 {
 234         if (parent_task->task_debug) {
 235                 int flavor;
 236                 mach_msg_type_number_t count;
 237
 238                 flavor = task_has_64Bit_data(parent_task) ? ARM_DEBUG_STATE64 : ARM_DEBUG_STATE32;
 239                 count = task_has_64Bit_data(parent_task) ? ARM_DEBUG_STATE64_COUNT : ARM_DEBUG_STATE32_COUNT;
 240
 241                 return machine_thread_set_state(thread, flavor, parent_task->task_debug, count);
 242         }
 243
 244         return KERN_SUCCESS;
 245 }
 246
 247
 248 void
 249 machine_task_init(__unused task_t new_task,
 250     __unused task_t parent_task,
 251     __unused boolean_t memory_inherit)
 252 {
 253 }