summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/dbxface.c
blob: 4647aa8efecbb79772102ace42ecc1aed73bd198 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/*******************************************************************************
 *
 * Module Name: dbxface - AML Debugger external interfaces
 *
 ******************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "amlcode.h"
#include "acdebug.h"
#include "acinterp.h"

#define _COMPONENT          ACPI_CA_DEBUGGER
ACPI_MODULE_NAME("dbxface")

/* Local prototypes */
static acpi_status
acpi_db_start_command(struct acpi_walk_state *walk_state,
		      union acpi_parse_object *op);

#ifdef ACPI_OBSOLETE_FUNCTIONS
void acpi_db_method_end(struct acpi_walk_state *walk_state);
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_start_command
 *
 * PARAMETERS:  walk_state      - Current walk
 *              op              - Current executing Op, from AML interpreter
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enter debugger command loop
 *
 ******************************************************************************/

static acpi_status
acpi_db_start_command(struct acpi_walk_state *walk_state,
		      union acpi_parse_object *op)
{
	acpi_status status;

	/* TBD: [Investigate] are there namespace locking issues here? */

	/* acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); */

	/* Go into the command loop and await next user command */

	acpi_gbl_method_executing = TRUE;
	status = AE_CTRL_TRUE;

	while (status == AE_CTRL_TRUE) {

		/* Notify the completion of the command */

		status = acpi_os_notify_command_complete();
		if (ACPI_FAILURE(status)) {
			goto error_exit;
		}

		/* Wait the readiness of the command */

		status = acpi_os_wait_command_ready();
		if (ACPI_FAILURE(status)) {
			goto error_exit;
		}

		status =
		    acpi_db_command_dispatch(acpi_gbl_db_line_buf, walk_state,
					     op);
	}

	/* acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); */

error_exit:
	if (ACPI_FAILURE(status) && status != AE_CTRL_TERMINATE) {
		ACPI_EXCEPTION((AE_INFO, status,
				"While parsing/handling command line"));
	}
	return (status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_signal_break_point
 *
 * PARAMETERS:  walk_state      - Current walk
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Called for AML_BREAKPOINT_OP
 *
 ******************************************************************************/

void acpi_db_signal_break_point(struct acpi_walk_state *walk_state)
{

#ifndef ACPI_APPLICATION
	if (acpi_gbl_db_thread_id != acpi_os_get_thread_id()) {
		return;
	}
#endif

	/*
	 * Set the single-step flag. This will cause the debugger (if present)
	 * to break to the console within the AML debugger at the start of the
	 * next AML instruction.
	 */
	acpi_gbl_cm_single_step = TRUE;
	acpi_os_printf("**break** Executed AML BreakPoint opcode\n");
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_db_single_step
 *
 * PARAMETERS:  walk_state      - Current walk
 *              op              - Current executing op (from aml interpreter)
 *              opcode_class    - Class of the current AML Opcode
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Called just before execution of an AML opcode.
 *
 ******************************************************************************/

acpi_status
acpi_db_single_step(struct acpi_walk_state *walk_state,
		    union acpi_parse_object *op, u32 opcode_class)
{
	union acpi_parse_object *next;
	acpi_status status = AE_OK;
	u32 original_debug_level;
	union acpi_parse_object *display_op;
	union acpi_parse_object *parent_op;
	u32 aml_offset;

	ACPI_FUNCTION_ENTRY();

#ifndef ACPI_APPLICATION
	if (acpi_gbl_db_thread_id != acpi_os_get_thread_id()) {
		return (AE_OK);
	}
#endif

	/* Check the abort flag */

	if (acpi_gbl_abort_method) {
		acpi_gbl_abort_method = FALSE;
		return (AE_ABORT_METHOD);
	}

	aml_offset = (u32)ACPI_PTR_DIFF(op->common.aml,
					walk_state->parser_state.aml_start);

	/* Check for single-step breakpoint */

	if (walk_state->method_breakpoint &&
	    (walk_state->method_breakpoint <= aml_offset)) {

		/* Check if the breakpoint has been reached or passed */
		/* Hit the breakpoint, resume single step, reset breakpoint */

		acpi_os_printf("***Break*** at AML offset %X\n", aml_offset);
		acpi_gbl_cm_single_step = TRUE;
		acpi_gbl_step_to_next_call = FALSE;
		walk_state->method_breakpoint = 0;
	}

	/* Check for user breakpoint (Must be on exact Aml offset) */

	else if (walk_state->user_breakpoint &&
		 (walk_state->user_breakpoint == aml_offset)) {
		acpi_os_printf("***UserBreakpoint*** at AML offset %X\n",
			       aml_offset);
		acpi_gbl_cm_single_step = TRUE;
		acpi_gbl_step_to_next_call = FALSE;
		walk_state->method_breakpoint = 0;
	}

	/*
	 * Check if this is an opcode that we are interested in --
	 * namely, opcodes that have arguments
	 */
	if (op->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
		return (AE_OK);
	}

	switch (opcode_class) {
	case AML_CLASS_UNKNOWN:
	case AML_CLASS_ARGUMENT:	/* constants, literals, etc. do nothing */

		return (AE_OK);

	default:

		/* All other opcodes -- continue */
		break;
	}

	/*
	 * Under certain debug conditions, display this opcode and its operands
	 */
	if ((acpi_gbl_db_output_to_file) ||
	    (acpi_gbl_cm_single_step) || (acpi_dbg_level & ACPI_LV_PARSE)) {
		if ((acpi_gbl_db_output_to_file) ||
		    (acpi_dbg_level & ACPI_LV_PARSE)) {
			acpi_os_printf
			    ("\nAML Debug: Next AML Opcode to execute:\n");
		}

		/*
		 * Display this op (and only this op - zero out the NEXT field
		 * temporarily, and disable parser trace output for the duration of
		 * the display because we don't want the extraneous debug output)
		 */
		original_debug_level = acpi_dbg_level;
		acpi_dbg_level &= ~(ACPI_LV_PARSE | ACPI_LV_FUNCTIONS);
		next = op->common.next;
		op->common.next = NULL;

		display_op = op;
		parent_op = op->common.parent;
		if (parent_op) {
			if ((walk_state->control_state) &&
			    (walk_state->control_state->common.state ==
			     ACPI_CONTROL_PREDICATE_EXECUTING)) {
				/*
				 * We are executing the predicate of an IF or WHILE statement
				 * Search upwards for the containing IF or WHILE so that the
				 * entire predicate can be displayed.
				 */
				while (parent_op) {
					if ((parent_op->common.aml_opcode ==
					     AML_IF_OP)
					    || (parent_op->common.aml_opcode ==
						AML_WHILE_OP)) {
						display_op = parent_op;
						break;
					}
					parent_op = parent_op->common.parent;
				}
			} else {
				while (parent_op) {
					if ((parent_op->common.aml_opcode ==
					     AML_IF_OP)
					    || (parent_op->common.aml_opcode ==
						AML_ELSE_OP)
					    || (parent_op->common.aml_opcode ==
						AML_SCOPE_OP)
					    || (parent_op->common.aml_opcode ==
						AML_METHOD_OP)
					    || (parent_op->common.aml_opcode ==
						AML_WHILE_OP)) {
						break;
					}
					display_op = parent_op;
					parent_op = parent_op->common.parent;
				}
			}
		}

		/* Now we can display it */

#ifdef ACPI_DISASSEMBLER
		acpi_dm_disassemble(walk_state, display_op, ACPI_UINT32_MAX);
#endif

		if ((op->common.aml_opcode == AML_IF_OP) ||
		    (op->common.aml_opcode == AML_WHILE_OP)) {
			if (walk_state->control_state->common.value) {
				acpi_os_printf
				    ("Predicate = [True], IF block was executed\n");
			} else {
				acpi_os_printf
				    ("Predicate = [False], Skipping IF block\n");
			}
		} else if (op->common.aml_opcode == AML_ELSE_OP) {
			acpi_os_printf
			    ("Predicate = [False], ELSE block was executed\n");
		}

		/* Restore everything */

		op->common.next = next;
		acpi_os_printf("\n");
		if ((acpi_gbl_db_output_to_file) ||
		    (acpi_dbg_level & ACPI_LV_PARSE)) {
			acpi_os_printf("\n");
		}
		acpi_dbg_level = original_debug_level;
	}

	/* If we are not single stepping, just continue executing the method */

	if (!acpi_gbl_cm_single_step) {
		return (AE_OK);
	}

	/*
	 * If we are executing a step-to-call command,
	 * Check if this is a method call.
	 */
	if (acpi_gbl_step_to_next_call) {
		if (op->common.aml_opcode != AML_INT_METHODCALL_OP) {

			/* Not a method call, just keep executing */

			return (AE_OK);
		}

		/* Found a method call, stop executing */

		acpi_gbl_step_to_next_call = FALSE;
	}

	/*
	 * If the next opcode is a method call, we will "step over" it
	 * by default.
	 */
	if (op->common.aml_opcode == AML_INT_METHODCALL_OP) {

		/* Force no more single stepping while executing called method */

		acpi_gbl_cm_single_step = FALSE;

		/*
		 * Set the breakpoint on/before the call, it will stop execution
		 * as soon as we return
		 */
		walk_state->method_breakpoint = 1;	/* Must be non-zero! */
	}

	acpi_ex_exit_interpreter();
	status = acpi_db_start_command(walk_state, op);
	acpi_ex_enter_interpreter();

	/* User commands complete, continue execution of the interrupted method */

	return (status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_initialize_debugger
 *
 * PARAMETERS:  None
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Init and start debugger
 *
 ******************************************************************************/

acpi_status acpi_initialize_debugger(void)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_initialize_debugger);

	/* Init globals */

	acpi_gbl_db_buffer = NULL;
	acpi_gbl_db_filename = NULL;
	acpi_gbl_db_output_to_file = FALSE;

	acpi_gbl_db_debug_level = ACPI_LV_VERBOSITY2;
	acpi_gbl_db_console_debug_level = ACPI_NORMAL_DEFAULT | ACPI_LV_TABLES;
	acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;

	acpi_gbl_db_opt_no_ini_methods = FALSE;

	acpi_gbl_db_buffer = acpi_os_allocate(ACPI_DEBUG_BUFFER_SIZE);
	if (!acpi_gbl_db_buffer) {
		return_ACPI_STATUS(AE_NO_MEMORY);
	}
	memset(acpi_gbl_db_buffer, 0, ACPI_DEBUG_BUFFER_SIZE);

	/* Initial scope is the root */

	acpi_gbl_db_scope_buf[0] = AML_ROOT_PREFIX;
	acpi_gbl_db_scope_buf[1] = 0;
	acpi_gbl_db_scope_node = acpi_gbl_root_node;

	/* Initialize user commands loop */

	acpi_gbl_db_terminate_loop = FALSE;

	/*
	 * If configured for multi-thread support, the debug executor runs in
	 * a separate thread so that the front end can be in another address
	 * space, environment, or even another machine.
	 */
	if (acpi_gbl_debugger_configuration & DEBUGGER_MULTI_THREADED) {

		/* These were created with one unit, grab it */

		status = acpi_os_initialize_debugger();
		if (ACPI_FAILURE(status)) {
			acpi_os_printf("Could not get debugger mutex\n");
			return_ACPI_STATUS(status);
		}

		/* Create the debug execution thread to execute commands */

		acpi_gbl_db_threads_terminated = FALSE;
		status = acpi_os_execute(OSL_DEBUGGER_MAIN_THREAD,
					 acpi_db_execute_thread, NULL);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Could not start debugger thread"));
			acpi_gbl_db_threads_terminated = TRUE;
			return_ACPI_STATUS(status);
		}
	} else {
		acpi_gbl_db_thread_id = acpi_os_get_thread_id();
	}

	return_ACPI_STATUS(AE_OK);
}

ACPI_EXPORT_SYMBOL(acpi_initialize_debugger)

/*******************************************************************************
 *
 * FUNCTION:    acpi_terminate_debugger
 *
 * PARAMETERS:  None
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop debugger
 *
 ******************************************************************************/
void acpi_terminate_debugger(void)
{

	/* Terminate the AML Debugger */

	acpi_gbl_db_terminate_loop = TRUE;

	if (acpi_gbl_debugger_configuration & DEBUGGER_MULTI_THREADED) {

		/* Wait the AML Debugger threads */

		while (!acpi_gbl_db_threads_terminated) {
			acpi_os_sleep(100);
		}

		acpi_os_terminate_debugger();
	}

	if (acpi_gbl_db_buffer) {
		acpi_os_free(acpi_gbl_db_buffer);
		acpi_gbl_db_buffer = NULL;
	}

	/* Ensure that debug output is now disabled */

	acpi_gbl_db_output_flags = ACPI_DB_DISABLE_OUTPUT;
}

ACPI_EXPORT_SYMBOL(acpi_terminate_debugger)

/*******************************************************************************
 *
 * FUNCTION:    acpi_set_debugger_thread_id
 *
 * PARAMETERS:  thread_id       - Debugger thread ID
 *
 * RETURN:      None
 *
 * DESCRIPTION: Set debugger thread ID
 *
 ******************************************************************************/
void acpi_set_debugger_thread_id(acpi_thread_id thread_id)
{
	acpi_gbl_db_thread_id = thread_id;
}

ACPI_EXPORT_SYMBOL(acpi_set_debugger_thread_id)