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
("\n[AmlDebug] 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! */
}
status = acpi_db_start_command(walk_state, op);
/* User commands complete, continue execution of the interrupted method */
return (status);
}
void
acpi_ds_dump_method_stack(acpi_status status,
struct acpi_walk_state *walk_state,
union acpi_parse_object *op)
{
union acpi_parse_object *next;
struct acpi_thread_state *thread;
struct acpi_walk_state *next_walk_state;
struct acpi_namespace_node *previous_method = NULL;
union acpi_operand_object *method_desc;
ACPI_FUNCTION_TRACE(ds_dump_method_stack);
/* Ignore control codes, they are not errors */
if ((status & AE_CODE_MASK) == AE_CODE_CONTROL) {
return_VOID;
}
/* We may be executing a deferred opcode */
if (walk_state->deferred_node) {
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Executing subtree for Buffer/Package/Region\n"));
return_VOID;
}
/*
* If there is no Thread, we are not actually executing a method.
* This can happen when the iASL compiler calls the interpreter
* to perform constant folding.
*/
thread = walk_state->thread;
if (!thread) {
return_VOID;
}
/* Display exception and method name */
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"\n**** Exception %s during execution of method ",
acpi_format_exception(status)));
acpi_ds_print_node_pathname(walk_state->method_node, NULL);
/* Display stack of executing methods */
ACPI_DEBUG_PRINT_RAW((ACPI_DB_DISPATCH,
"\n\nMethod Execution Stack:\n"));
next_walk_state = thread->walk_state_list;
/* Walk list of linked walk states */
while (next_walk_state) {
method_desc = next_walk_state->method_desc;
if (method_desc) {
acpi_ex_stop_trace_method((struct acpi_namespace_node *)
method_desc->method.node,
method_desc, walk_state);
}
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
" Method [%4.4s] executing: ",
acpi_ut_get_node_name(next_walk_state->
method_node)));
/* First method is the currently executing method */
if (next_walk_state == walk_state) {
if (op) {
/* Display currently executing ASL statement */
next = op->common.next;
op->common.next = NULL;
#ifdef ACPI_DISASSEMBLER
acpi_dm_disassemble(next_walk_state, op,
ACPI_UINT32_MAX);
#endif
op->common.next = next;
}
} else {
/*
* This method has called another method
* NOTE: the method call parse subtree is already deleted at
* this point, so we cannot disassemble the method invocation.
*/
ACPI_DEBUG_PRINT_RAW((ACPI_DB_DISPATCH,
"Call to method "));
acpi_ds_print_node_pathname(previous_method, NULL);
}
previous_method = next_walk_state->method_node;
next_walk_state = next_walk_state->next;
ACPI_DEBUG_PRINT_RAW((ACPI_DB_DISPATCH, "\n"));
}
return_VOID;
}
