kernel/drivers/acpi/acpica/dbmethod.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: dbmethod - Debug commands for control methods
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2015, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acdispat.h"
  47 #include "acnamesp.h"
  48 #include "acdebug.h"
  49 #include "acparser.h"
  50 #include "acpredef.h"
  51
  52 #define _COMPONENT          ACPI_CA_DEBUGGER
  53 ACPI_MODULE_NAME("dbmethod")
  54
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    acpi_db_set_method_breakpoint
  58  *
  59  * PARAMETERS:  location            - AML offset of breakpoint
  60  *              walk_state          - Current walk info
  61  *              op                  - Current Op (from parse walk)
  62  *
  63  * RETURN:      None
  64  *
  65  * DESCRIPTION: Set a breakpoint in a control method at the specified
  66  *              AML offset
  67  *
  68  ******************************************************************************/
  69 void
  70 acpi_db_set_method_breakpoint(char *location,
  71                               struct acpi_walk_state *walk_state,
  72                               union acpi_parse_object *op)
  73 {
  74         u32 address;
  75         u32 aml_offset;
  76
  77         if (!op) {
  78                 acpi_os_printf("There is no method currently executing\n");
  79                 return;
  80         }
  81
  82         /* Get and verify the breakpoint address */
  83
  84         address = strtoul(location, NULL, 16);
  85         aml_offset = (u32)ACPI_PTR_DIFF(op->common.aml,
  86                                         walk_state->parser_state.aml_start);
  87         if (address <= aml_offset) {
  88                 acpi_os_printf("Breakpoint %X is beyond current address %X\n",
  89                                address, aml_offset);
  90         }
  91
  92         /* Save breakpoint in current walk */
  93
  94         walk_state->user_breakpoint = address;
  95         acpi_os_printf("Breakpoint set at AML offset %X\n", address);
  96 }
  97
  98 /*******************************************************************************
  99  *
 100  * FUNCTION:    acpi_db_set_method_call_breakpoint
 101  *
 102  * PARAMETERS:  op                  - Current Op (from parse walk)
 103  *
 104  * RETURN:      None
 105  *
 106  * DESCRIPTION: Set a breakpoint in a control method at the specified
 107  *              AML offset
 108  *
 109  ******************************************************************************/
 110
 111 void acpi_db_set_method_call_breakpoint(union acpi_parse_object *op)
 112 {
 113
 114         if (!op) {
 115                 acpi_os_printf("There is no method currently executing\n");
 116                 return;
 117         }
 118
 119         acpi_gbl_step_to_next_call = TRUE;
 120 }
 121
 122 /*******************************************************************************
 123  *
 124  * FUNCTION:    acpi_db_set_method_data
 125  *
 126  * PARAMETERS:  type_arg        - L for local, A for argument
 127  *              index_arg       - which one
 128  *              value_arg       - Value to set.
 129  *
 130  * RETURN:      None
 131  *
 132  * DESCRIPTION: Set a local or argument for the running control method.
 133  *              NOTE: only object supported is Number.
 134  *
 135  ******************************************************************************/
 136
 137 void acpi_db_set_method_data(char *type_arg, char *index_arg, char *value_arg)
 138 {
 139         char type;
 140         u32 index;
 141         u32 value;
 142         struct acpi_walk_state *walk_state;
 143         union acpi_operand_object *obj_desc;
 144         acpi_status status;
 145         struct acpi_namespace_node *node;
 146
 147         /* Validate type_arg */
 148
 149         acpi_ut_strupr(type_arg);
 150         type = type_arg[0];
 151         if ((type != 'L') && (type != 'A') && (type != 'N')) {
 152                 acpi_os_printf("Invalid SET operand: %s\n", type_arg);
 153                 return;
 154         }
 155
 156         value = strtoul(value_arg, NULL, 16);
 157
 158         if (type == 'N') {
 159                 node = acpi_db_convert_to_node(index_arg);
 160                 if (!node) {
 161                         return;
 162                 }
 163
 164                 if (node->type != ACPI_TYPE_INTEGER) {
 165                         acpi_os_printf("Can only set Integer nodes\n");
 166                         return;
 167                 }
 168                 obj_desc = node->object;
 169                 obj_desc->integer.value = value;
 170                 return;
 171         }
 172
 173         /* Get the index and value */
 174
 175         index = strtoul(index_arg, NULL, 16);
 176
 177         walk_state = acpi_ds_get_current_walk_state(acpi_gbl_current_walk_list);
 178         if (!walk_state) {
 179                 acpi_os_printf("There is no method currently executing\n");
 180                 return;
 181         }
 182
 183         /* Create and initialize the new object */
 184
 185         obj_desc = acpi_ut_create_integer_object((u64)value);
 186         if (!obj_desc) {
 187                 acpi_os_printf("Could not create an internal object\n");
 188                 return;
 189         }
 190
 191         /* Store the new object into the target */
 192
 193         switch (type) {
 194         case 'A':
 195
 196                 /* Set a method argument */
 197
 198                 if (index > ACPI_METHOD_MAX_ARG) {
 199                         acpi_os_printf("Arg%u - Invalid argument name\n",
 200                                        index);
 201                         goto cleanup;
 202                 }
 203
 204                 status = acpi_ds_store_object_to_local(ACPI_REFCLASS_ARG,
 205                                                        index, obj_desc,
 206                                                        walk_state);
 207                 if (ACPI_FAILURE(status)) {
 208                         goto cleanup;
 209                 }
 210
 211                 obj_desc = walk_state->arguments[index].object;
 212
 213                 acpi_os_printf("Arg%u: ", index);
 214                 acpi_db_display_internal_object(obj_desc, walk_state);
 215                 break;
 216
 217         case 'L':
 218
 219                 /* Set a method local */
 220
 221                 if (index > ACPI_METHOD_MAX_LOCAL) {
 222                         acpi_os_printf
 223                             ("Local%u - Invalid local variable name\n", index);
 224                         goto cleanup;
 225                 }
 226
 227                 status = acpi_ds_store_object_to_local(ACPI_REFCLASS_LOCAL,
 228                                                        index, obj_desc,
 229                                                        walk_state);
 230                 if (ACPI_FAILURE(status)) {
 231                         goto cleanup;
 232                 }
 233
 234                 obj_desc = walk_state->local_variables[index].object;
 235
 236                 acpi_os_printf("Local%u: ", index);
 237                 acpi_db_display_internal_object(obj_desc, walk_state);
 238                 break;
 239
 240         default:
 241
 242                 break;
 243         }
 244
 245 cleanup:
 246         acpi_ut_remove_reference(obj_desc);
 247 }
 248
 249 /*******************************************************************************
 250  *
 251  * FUNCTION:    acpi_db_disassemble_aml
 252  *
 253  * PARAMETERS:  statements          - Number of statements to disassemble
 254  *              op                  - Current Op (from parse walk)
 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 void acpi_db_disassemble_aml(char *statements, union acpi_parse_object *op)
 264 {
 265         u32 num_statements = 8;
 266
 267         if (!op) {
 268                 acpi_os_printf("There is no method currently executing\n");
 269                 return;
 270         }
 271
 272         if (statements) {
 273                 num_statements = strtoul(statements, NULL, 0);
 274         }
 275 #ifdef ACPI_DISASSEMBLER
 276         acpi_dm_disassemble(NULL, op, num_statements);
 277 #endif
 278 }
 279
 280 /*******************************************************************************
 281  *
 282  * FUNCTION:    acpi_db_disassemble_method
 283  *
 284  * PARAMETERS:  name            - Name of control method
 285  *
 286  * RETURN:      None
 287  *
 288  * DESCRIPTION: Display disassembled AML (ASL) starting from Op for the number
 289  *              of statements specified.
 290  *
 291  ******************************************************************************/
 292
 293 acpi_status acpi_db_disassemble_method(char *name)
 294 {
 295         acpi_status status;
 296         union acpi_parse_object *op;
 297         struct acpi_walk_state *walk_state;
 298         union acpi_operand_object *obj_desc;
 299         struct acpi_namespace_node *method;
 300
 301         method = acpi_db_convert_to_node(name);
 302         if (!method) {
 303                 return (AE_BAD_PARAMETER);
 304         }
 305
 306         if (method->type != ACPI_TYPE_METHOD) {
 307                 ACPI_ERROR((AE_INFO, "%s (%s): Object must be a control method",
 308                             name, acpi_ut_get_type_name(method->type)));
 309                 return (AE_BAD_PARAMETER);
 310         }
 311
 312         obj_desc = method->object;
 313
 314         op = acpi_ps_create_scope_op(obj_desc->method.aml_start);
 315         if (!op) {
 316                 return (AE_NO_MEMORY);
 317         }
 318
 319         /* Create and initialize a new walk state */
 320
 321         walk_state = acpi_ds_create_walk_state(0, op, NULL, NULL);
 322         if (!walk_state) {
 323                 return (AE_NO_MEMORY);
 324         }
 325
 326         status = acpi_ds_init_aml_walk(walk_state, op, NULL,
 327                                        obj_desc->method.aml_start,
 328                                        obj_desc->method.aml_length, NULL,
 329                                        ACPI_IMODE_LOAD_PASS1);
 330         if (ACPI_FAILURE(status)) {
 331                 return (status);
 332         }
 333
 334         status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
 335         walk_state->owner_id = obj_desc->method.owner_id;
 336
 337         /* Push start scope on scope stack and make it current */
 338
 339         status = acpi_ds_scope_stack_push(method, method->type, walk_state);
 340         if (ACPI_FAILURE(status)) {
 341                 return (status);
 342         }
 343
 344         /* Parse the entire method AML including deferred operators */
 345
 346         walk_state->parse_flags &= ~ACPI_PARSE_DELETE_TREE;
 347         walk_state->parse_flags |= ACPI_PARSE_DISASSEMBLE;
 348
 349         status = acpi_ps_parse_aml(walk_state);
 350
 351 #ifdef ACPI_DISASSEMBLER
 352         (void)acpi_dm_parse_deferred_ops(op);
 353
 354         /* Now we can disassemble the method */
 355
 356         acpi_gbl_dm_opt_verbose = FALSE;
 357         acpi_dm_disassemble(NULL, op, 0);
 358         acpi_gbl_dm_opt_verbose = TRUE;
 359 #endif
 360
 361         acpi_ps_delete_parse_tree(op);
 362
 363         /* Method cleanup */
 364
 365         acpi_ns_delete_namespace_subtree(method);
 366         acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id);
 367         acpi_ut_release_owner_id(&obj_desc->method.owner_id);
 368         return (AE_OK);
 369 }