root/drivers/acpi/acpica/dbmethod.c

DEFINITIONS

1. ACPI_MODULE_NAME
2. acpi_db_set_method_call_breakpoint
3. acpi_db_set_method_data
4. acpi_db_disassemble_aml
5. acpi_db_disassemble_method
6. acpi_db_walk_for_execute
7. acpi_db_evaluate_predefined_names

   1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
   2 /*******************************************************************************
   3  *
   4  * Module Name: dbmethod - Debug commands for control methods
   5  *
   6  ******************************************************************************/
   7 
   8 #include <acpi/acpi.h>
   9 #include "accommon.h"
  10 #include "acdispat.h"
  11 #include "acnamesp.h"
  12 #include "acdebug.h"
  13 #include "acparser.h"
  14 #include "acpredef.h"
  15 
  16 #define _COMPONENT          ACPI_CA_DEBUGGER
  17 ACPI_MODULE_NAME("dbmethod")
  18 
  19 /* Local prototypes */
  20 static acpi_status
  21 acpi_db_walk_for_execute(acpi_handle obj_handle,
  22                          u32 nesting_level, void *context, void **return_value);
  23 
  24 /*******************************************************************************
  25  *
  26  * FUNCTION:    acpi_db_set_method_breakpoint
  27  *
  28  * PARAMETERS:  location            - AML offset of breakpoint
  29  *              walk_state          - Current walk info
  30  *              op                  - Current Op (from parse walk)
  31  *
  32  * RETURN:      None
  33  *
  34  * DESCRIPTION: Set a breakpoint in a control method at the specified
  35  *              AML offset
  36  *
  37  ******************************************************************************/
  38 
  39 void
  40 acpi_db_set_method_breakpoint(char *location,
  41                               struct acpi_walk_state *walk_state,
  42                               union acpi_parse_object *op)
  43 {
  44         u32 address;
  45         u32 aml_offset;
  46 
  47         if (!op) {
  48                 acpi_os_printf("There is no method currently executing\n");
  49                 return;
  50         }
  51 
  52         /* Get and verify the breakpoint address */
  53 
  54         address = strtoul(location, NULL, 16);
  55         aml_offset = (u32)ACPI_PTR_DIFF(op->common.aml,
  56                                         walk_state->parser_state.aml_start);
  57         if (address <= aml_offset) {
  58                 acpi_os_printf("Breakpoint %X is beyond current address %X\n",
  59                                address, aml_offset);
  60         }
  61 
  62         /* Save breakpoint in current walk */
  63 
  64         walk_state->user_breakpoint = address;
  65         acpi_os_printf("Breakpoint set at AML offset %X\n", address);
  66 }
  67 
  68 /*******************************************************************************
  69  *
  70  * FUNCTION:    acpi_db_set_method_call_breakpoint
  71  *
  72  * PARAMETERS:  op                  - Current Op (from parse walk)
  73  *
  74  * RETURN:      None
  75  *
  76  * DESCRIPTION: Set a breakpoint in a control method at the specified
  77  *              AML offset
  78  *
  79  ******************************************************************************/
  80 
  81 void acpi_db_set_method_call_breakpoint(union acpi_parse_object *op)
  82 {
  83 
  84         if (!op) {
  85                 acpi_os_printf("There is no method currently executing\n");
  86                 return;
  87         }
  88 
  89         acpi_gbl_step_to_next_call = TRUE;
  90 }
  91 
  92 /*******************************************************************************
  93  *
  94  * FUNCTION:    acpi_db_set_method_data
  95  *
  96  * PARAMETERS:  type_arg        - L for local, A for argument
  97  *              index_arg       - which one
  98  *              value_arg       - Value to set.
  99  *
 100  * RETURN:      None
 101  *
 102  * DESCRIPTION: Set a local or argument for the running control method.
 103  *              NOTE: only object supported is Number.
 104  *
 105  ******************************************************************************/
 106 
 107 void acpi_db_set_method_data(char *type_arg, char *index_arg, char *value_arg)
 108 {
 109         char type;
 110         u32 index;
 111         u32 value;
 112         struct acpi_walk_state *walk_state;
 113         union acpi_operand_object *obj_desc;
 114         acpi_status status;
 115         struct acpi_namespace_node *node;
 116 
 117         /* Validate type_arg */
 118 
 119         acpi_ut_strupr(type_arg);
 120         type = type_arg[0];
 121         if ((type != 'L') && (type != 'A') && (type != 'N')) {
 122                 acpi_os_printf("Invalid SET operand: %s\n", type_arg);
 123                 return;
 124         }
 125 
 126         value = strtoul(value_arg, NULL, 16);
 127 
 128         if (type == 'N') {
 129                 node = acpi_db_convert_to_node(index_arg);
 130                 if (!node) {
 131                         return;
 132                 }
 133 
 134                 if (node->type != ACPI_TYPE_INTEGER) {
 135                         acpi_os_printf("Can only set Integer nodes\n");
 136                         return;
 137                 }
 138                 obj_desc = node->object;
 139                 obj_desc->integer.value = value;
 140                 return;
 141         }
 142 
 143         /* Get the index and value */
 144 
 145         index = strtoul(index_arg, NULL, 16);
 146 
 147         walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
 148         if (!walk_state) {
 149                 acpi_os_printf("There is no method currently executing\n");
 150                 return;
 151         }
 152 
 153         /* Create and initialize the new object */
 154 
 155         obj_desc = acpi_ut_create_integer_object((u64)value);
 156         if (!obj_desc) {
 157                 acpi_os_printf("Could not create an internal object\n");
 158                 return;
 159         }
 160 
 161         /* Store the new object into the target */
 162 
 163         switch (type) {
 164         case 'A':
 165 
 166                 /* Set a method argument */
 167 
 168                 if (index > ACPI_METHOD_MAX_ARG) {
 169                         acpi_os_printf("Arg%u - Invalid argument name\n",
 170                                        index);
 171                         goto cleanup;
 172                 }
 173 
 174                 status = acpi_ds_store_object_to_local(ACPI_REFCLASS_ARG,
 175                                                        index, obj_desc,
 176                                                        walk_state);
 177                 if (ACPI_FAILURE(status)) {
 178                         goto cleanup;
 179                 }
 180 
 181                 obj_desc = walk_state->arguments[index].object;
 182 
 183                 acpi_os_printf("Arg%u: ", index);
 184                 acpi_db_display_internal_object(obj_desc, walk_state);
 185                 break;
 186 
 187         case 'L':
 188 
 189                 /* Set a method local */
 190 
 191                 if (index > ACPI_METHOD_MAX_LOCAL) {
 192                         acpi_os_printf
 193                             ("Local%u - Invalid local variable name\n", index);
 194                         goto cleanup;
 195                 }
 196 
 197                 status = acpi_ds_store_object_to_local(ACPI_REFCLASS_LOCAL,
 198                                                        index, obj_desc,
 199                                                        walk_state);
 200                 if (ACPI_FAILURE(status)) {
 201                         goto cleanup;
 202                 }
 203 
 204                 obj_desc = walk_state->local_variables[index].object;
 205 
 206                 acpi_os_printf("Local%u: ", index);
 207                 acpi_db_display_internal_object(obj_desc, walk_state);
 208                 break;
 209 
 210         default:
 211 
 212                 break;
 213         }
 214 
 215 cleanup:
 216         acpi_ut_remove_reference(obj_desc);
 217 }
 218 
 219 #ifdef ACPI_DISASSEMBLER
 220 /*******************************************************************************
 221  *
 222  * FUNCTION:    acpi_db_disassemble_aml
 223  *
 224  * PARAMETERS:  statements          - Number of statements to disassemble
 225  *              op                  - Current Op (from parse walk)
 226  *
 227  * RETURN:      None
 228  *
 229  * DESCRIPTION: Display disassembled AML (ASL) starting from Op for the number
 230  *              of statements specified.
 231  *
 232  ******************************************************************************/
 233 
 234 void acpi_db_disassemble_aml(char *statements, union acpi_parse_object *op)
 235 {
 236         u32 num_statements = 8;
 237 
 238         if (!op) {
 239                 acpi_os_printf("There is no method currently executing\n");
 240                 return;
 241         }
 242 
 243         if (statements) {
 244                 num_statements = strtoul(statements, NULL, 0);
 245         }
 246 
 247         acpi_dm_disassemble(NULL, op, num_statements);
 248 }
 249 
 250 /*******************************************************************************
 251  *
 252  * FUNCTION:    acpi_db_disassemble_method
 253  *
 254  * PARAMETERS:  name            - Name of control method
 255  *
 256  * RETURN:      None
 257  *
 258  * DESCRIPTION: Display disassembled AML (ASL) starting from Op for the number
 259  *              of statements specified.
 260  *
 261  ******************************************************************************/
 262 
 263 acpi_status acpi_db_disassemble_method(char *name)
 264 {
 265         acpi_status status;
 266         union acpi_parse_object *op;
 267         struct acpi_walk_state *walk_state;
 268         union acpi_operand_object *obj_desc;
 269         struct acpi_namespace_node *method;
 270 
 271         method = acpi_db_convert_to_node(name);
 272         if (!method) {
 273                 return (AE_BAD_PARAMETER);
 274         }
 275 
 276         if (method->type != ACPI_TYPE_METHOD) {
 277                 ACPI_ERROR((AE_INFO, "%s (%s): Object must be a control method",
 278                             name, acpi_ut_get_type_name(method->type)));
 279                 return (AE_BAD_PARAMETER);
 280         }
 281 
 282         obj_desc = method->object;
 283 
 284         op = acpi_ps_create_scope_op(obj_desc->method.aml_start);
 285         if (!op) {
 286                 return (AE_NO_MEMORY);
 287         }
 288 
 289         /* Create and initialize a new walk state */
 290 
 291         walk_state = acpi_ds_create_walk_state(0, op, NULL, NULL);
 292         if (!walk_state) {
 293                 return (AE_NO_MEMORY);
 294         }
 295 
 296         status = acpi_ds_init_aml_walk(walk_state, op, NULL,
 297                                        obj_desc->method.aml_start,
 298                                        obj_desc->method.aml_length, NULL,
 299                                        ACPI_IMODE_LOAD_PASS1);
 300         if (ACPI_FAILURE(status)) {
 301                 return (status);
 302         }
 303 
 304         status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
 305         if (ACPI_FAILURE(status)) {
 306                 return (status);
 307         }
 308 
 309         walk_state->owner_id = obj_desc->method.owner_id;
 310 
 311         /* Push start scope on scope stack and make it current */
 312 
 313         status = acpi_ds_scope_stack_push(method, method->type, walk_state);
 314         if (ACPI_FAILURE(status)) {
 315                 return (status);
 316         }
 317 
 318         /* Parse the entire method AML including deferred operators */
 319 
 320         walk_state->parse_flags &= ~ACPI_PARSE_DELETE_TREE;
 321         walk_state->parse_flags |= ACPI_PARSE_DISASSEMBLE;
 322 
 323         status = acpi_ps_parse_aml(walk_state);
 324         (void)acpi_dm_parse_deferred_ops(op);
 325 
 326         /* Now we can disassemble the method */
 327 
 328         acpi_gbl_dm_opt_verbose = FALSE;
 329         acpi_dm_disassemble(NULL, op, 0);
 330         acpi_gbl_dm_opt_verbose = TRUE;
 331 
 332         acpi_ps_delete_parse_tree(op);
 333 
 334         /* Method cleanup */
 335 
 336         acpi_ns_delete_namespace_subtree(method);
 337         acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id);
 338         acpi_ut_release_owner_id(&obj_desc->method.owner_id);
 339         return (AE_OK);
 340 }
 341 #endif
 342 
 343 /*******************************************************************************
 344  *
 345  * FUNCTION:    acpi_db_walk_for_execute
 346  *
 347  * PARAMETERS:  Callback from walk_namespace
 348  *
 349  * RETURN:      Status
 350  *
 351  * DESCRIPTION: Batch execution module. Currently only executes predefined
 352  *              ACPI names.
 353  *
 354  ******************************************************************************/
 355 
 356 static acpi_status
 357 acpi_db_walk_for_execute(acpi_handle obj_handle,
 358                          u32 nesting_level, void *context, void **return_value)
 359 {
 360         struct acpi_namespace_node *node =
 361             (struct acpi_namespace_node *)obj_handle;
 362         struct acpi_db_execute_walk *info =
 363             (struct acpi_db_execute_walk *)context;
 364         struct acpi_buffer return_obj;
 365         acpi_status status;
 366         char *pathname;
 367         u32 i;
 368         struct acpi_device_info *obj_info;
 369         struct acpi_object_list param_objects;
 370         union acpi_object params[ACPI_METHOD_NUM_ARGS];
 371         const union acpi_predefined_info *predefined;
 372 
 373         predefined = acpi_ut_match_predefined_method(node->name.ascii);
 374         if (!predefined) {
 375                 return (AE_OK);
 376         }
 377 
 378         if (node->type == ACPI_TYPE_LOCAL_SCOPE) {
 379                 return (AE_OK);
 380         }
 381 
 382         pathname = acpi_ns_get_external_pathname(node);
 383         if (!pathname) {
 384                 return (AE_OK);
 385         }
 386 
 387         /* Get the object info for number of method parameters */
 388 
 389         status = acpi_get_object_info(obj_handle, &obj_info);
 390         if (ACPI_FAILURE(status)) {
 391                 ACPI_FREE(pathname);
 392                 return (status);
 393         }
 394 
 395         param_objects.pointer = NULL;
 396         param_objects.count = 0;
 397 
 398         if (obj_info->type == ACPI_TYPE_METHOD) {
 399 
 400                 /* Setup default parameters */
 401 
 402                 for (i = 0; i < obj_info->param_count; i++) {
 403                         params[i].type = ACPI_TYPE_INTEGER;
 404                         params[i].integer.value = 1;
 405                 }
 406 
 407                 param_objects.pointer = params;
 408                 param_objects.count = obj_info->param_count;
 409         }
 410 
 411         ACPI_FREE(obj_info);
 412         return_obj.pointer = NULL;
 413         return_obj.length = ACPI_ALLOCATE_BUFFER;
 414 
 415         /* Do the actual method execution */
 416 
 417         acpi_gbl_method_executing = TRUE;
 418 
 419         status = acpi_evaluate_object(node, NULL, &param_objects, &return_obj);
 420 
 421         acpi_os_printf("%-32s returned %s\n", pathname,
 422                        acpi_format_exception(status));
 423         acpi_gbl_method_executing = FALSE;
 424         ACPI_FREE(pathname);
 425 
 426         /* Ignore status from method execution */
 427 
 428         status = AE_OK;
 429 
 430         /* Update count, check if we have executed enough methods */
 431 
 432         info->count++;
 433         if (info->count >= info->max_count) {
 434                 status = AE_CTRL_TERMINATE;
 435         }
 436 
 437         return (status);
 438 }
 439 
 440 /*******************************************************************************
 441  *
 442  * FUNCTION:    acpi_db_evaluate_predefined_names
 443  *
 444  * PARAMETERS:  None
 445  *
 446  * RETURN:      None
 447  *
 448  * DESCRIPTION: Namespace batch execution. Execute predefined names in the
 449  *              namespace, up to the max count, if specified.
 450  *
 451  ******************************************************************************/
 452 
 453 void acpi_db_evaluate_predefined_names(void)
 454 {
 455         struct acpi_db_execute_walk info;
 456 
 457         info.count = 0;
 458         info.max_count = ACPI_UINT32_MAX;
 459 
 460         /* Search all nodes in namespace */
 461 
 462         (void)acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
 463                                   ACPI_UINT32_MAX, acpi_db_walk_for_execute,
 464                                   NULL, (void *)&info, NULL);
 465 
 466         acpi_os_printf("Evaluated %u predefined names in the namespace\n",
 467                        info.count);
 468 }