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ACPICA: Several fixes for internal method result stack

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fixes STACK_OVERFLOW exception on nested method calls. internal
bugzilla 262 and 275.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2008-04-10 19:06:36 +04:00 committed by Len Brown
parent 4b119e21d0
commit 773069d480
10 changed files with 181 additions and 503 deletions
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9
drivers/acpi/dispatcher/dsopcode.c
View File

@ -808,6 +808,12 @@ acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
/* The first operand (for all of these data objects) is the length */
/*
* Set proper index into operand stack for acpi_ds_obj_stack_push
* invoked inside acpi_ds_create_operand.
*/
walk_state->operand_index = walk_state->num_operands;
status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
@ -1070,8 +1076,7 @@ acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state,
* is set to anything other than zero!
*/
walk_state->return_desc = walk_state->operands[0];
} else if ((walk_state->results) &&
(walk_state->results->results.num_results > 0)) {
} else if (walk_state->result_count) {
/* Since we have a real Return(), delete any implicit return */

52
drivers/acpi/dispatcher/dsutils.c
View File

@ -630,9 +630,7 @@ acpi_ds_create_operand(struct acpi_walk_state *walk_state,
* Use value that was already previously returned
* by the evaluation of this argument
*/
status =
acpi_ds_result_pop_from_bottom(&obj_desc,
walk_state);
status = acpi_ds_result_pop(&obj_desc, walk_state);
if (ACPI_FAILURE(status)) {
/*
* Only error is underflow, and this indicates
@ -698,27 +696,54 @@ acpi_ds_create_operands(struct acpi_walk_state *walk_state,
{
acpi_status status = AE_OK;
union acpi_parse_object *arg;
u32 arg_count = 0;
union acpi_parse_object *arguments[ACPI_OBJ_NUM_OPERANDS];
u8 arg_count = 0;
u8 count = 0;
u8 index = walk_state->num_operands;
u8 i;
ACPI_FUNCTION_TRACE_PTR(ds_create_operands, first_arg);
/* For all arguments in the list... */
/* Get all arguments in the list */
arg = first_arg;
while (arg) {
status = acpi_ds_create_operand(walk_state, arg, arg_count);
if (ACPI_FAILURE(status)) {
goto cleanup;
if (index >= ACPI_OBJ_NUM_OPERANDS) {
return_ACPI_STATUS(AE_BAD_DATA);
}
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Arg #%d (%p) done, Arg1=%p\n", arg_count,
arg, first_arg));
arguments[index] = arg;
walk_state->operands[index] = NULL;
/* Move on to next argument, if any */
arg = arg->common.next;
arg_count++;
index++;
}
index--;
/* It is the appropriate order to get objects from the Result stack */
for (i = 0; i < arg_count; i++) {
arg = arguments[index];
/* Force the filling of the operand stack in inverse order */
walk_state->operand_index = index;
status = acpi_ds_create_operand(walk_state, arg, index);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
count++;
index--;
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
"Arg #%d (%p) done, Arg1=%p\n", index, arg,
first_arg));
}
return_ACPI_STATUS(status);
@ -729,9 +754,8 @@ acpi_ds_create_operands(struct acpi_walk_state *walk_state,
* pop everything off of the operand stack and delete those
* objects
*/
(void)acpi_ds_obj_stack_pop_and_delete(arg_count, walk_state);
acpi_ds_obj_stack_pop_and_delete(arg_count, walk_state);
ACPI_EXCEPTION((AE_INFO, status, "While creating Arg %d",
(arg_count + 1)));
ACPI_EXCEPTION((AE_INFO, status, "While creating Arg %d", index));
return_ACPI_STATUS(status);
}

43
drivers/acpi/dispatcher/dswexec.c
View File

@ -285,11 +285,6 @@ acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
switch (opcode_class) {
case AML_CLASS_CONTROL:
status = acpi_ds_result_stack_push(walk_state);
if (ACPI_FAILURE(status)) {
goto error_exit;
}
status = acpi_ds_exec_begin_control_op(walk_state, op);
break;
@ -305,20 +300,11 @@ acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
status = acpi_ds_load2_begin_op(walk_state, NULL);
}
if (op->common.aml_opcode == AML_REGION_OP) {
status = acpi_ds_result_stack_push(walk_state);
}
break;
case AML_CLASS_EXECUTE:
case AML_CLASS_CREATE:
/*
* Most operators with arguments (except create_xxx_field operators)
* Start a new result/operand state
*/
if (walk_state->op_info->object_type != ACPI_TYPE_BUFFER_FIELD) {
status = acpi_ds_result_stack_push(walk_state);
}
break;
default:
@ -374,6 +360,7 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
/* Init the walk state */
walk_state->num_operands = 0;
walk_state->operand_index = 0;
walk_state->return_desc = NULL;
walk_state->result_obj = NULL;
@ -400,13 +387,6 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
goto cleanup;
}
/* Done with this result state (Now that operand stack is built) */
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/*
* All opcodes require operand resolution, with the only exceptions
* being the object_type and size_of operators.
@ -487,16 +467,6 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
status = acpi_ds_exec_end_control_op(walk_state, op);
/* Make sure to properly pop the result stack */
if (ACPI_SUCCESS(status)) {
status = acpi_ds_result_stack_pop(walk_state);
} else if (status == AE_CTRL_PENDING) {
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_SUCCESS(status)) {
status = AE_CTRL_PENDING;
}
}
break;
case AML_TYPE_METHOD_CALL:
@ -632,13 +602,6 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
break;
}
/* Done with result state (Now that operand stack is built) */
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/*
* If a result object was returned from above, push it on the
* current result stack
@ -671,8 +634,6 @@ acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
if (ACPI_FAILURE(status)) {
break;
}
status = acpi_ds_result_stack_pop(walk_state);
}
break;

517
drivers/acpi/dispatcher/dswstate.c
View File

@ -49,85 +49,9 @@
#define _COMPONENT ACPI_DISPATCHER
ACPI_MODULE_NAME("dswstate")
/* Local prototypes */
#ifdef ACPI_OBSOLETE_FUNCTIONS
acpi_status
acpi_ds_result_insert(void *object,
u32 index, struct acpi_walk_state *walk_state);
acpi_status acpi_ds_obj_stack_delete_all(struct acpi_walk_state *walk_state);
acpi_status
acpi_ds_obj_stack_pop_object(union acpi_operand_object **object,
struct acpi_walk_state *walk_state);
void *acpi_ds_obj_stack_get_value(u32 index,
struct acpi_walk_state *walk_state);
#endif
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_remove
*
* PARAMETERS: Object - Where to return the popped object
* Index - Where to extract the object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_remove(union acpi_operand_object **object,
u32 index, struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME(ds_result_remove);
state = walk_state->results;
if (!state) {
ACPI_ERROR((AE_INFO, "No result object pushed! State=%p",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= ACPI_OBJ_MAX_OPERAND) {
ACPI_ERROR((AE_INFO,
"Index out of range: %X State=%p Num=%X",
index, walk_state, state->results.num_results));
}
/* Check for a valid result object */
if (!state->results.obj_desc[index]) {
ACPI_ERROR((AE_INFO,
"Null operand! State=%p #Ops=%X, Index=%X",
walk_state, state->results.num_results, index));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove the object */
state->results.num_results--;
*object = state->results.obj_desc[index];
state->results.obj_desc[index] = NULL;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object,
(*object) ? acpi_ut_get_object_type_name(*object) :
"NULL", index, walk_state,
state->results.num_results));
return (AE_OK);
}
#endif /* ACPI_FUTURE_USAGE */
/* Local prototypes */
static acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *ws);
static acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state *ws);
/*******************************************************************************
*
@ -138,122 +62,67 @@ acpi_ds_result_remove(union acpi_operand_object **object,
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
* DESCRIPTION: Pop an object off the top of this walk's result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_pop(union acpi_operand_object ** object,
struct acpi_walk_state * walk_state)
acpi_ds_result_pop(union acpi_operand_object **object,
struct acpi_walk_state *walk_state)
{
acpi_native_uint index;
union acpi_generic_state *state;
acpi_status status;
ACPI_FUNCTION_NAME(ds_result_pop);
state = walk_state->results;
if (!state) {
return (AE_OK);
/* Incorrect state of result stack */
if (state && !walk_state->result_count) {
ACPI_ERROR((AE_INFO, "No results on result stack"));
return (AE_AML_INTERNAL);
}
if (!state->results.num_results) {
if (!state && walk_state->result_count) {
ACPI_ERROR((AE_INFO, "No result state for result stack"));
return (AE_AML_INTERNAL);
}
/* Empty result stack */
if (!state) {
ACPI_ERROR((AE_INFO, "Result stack is empty! State=%p",
walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove top element */
/* Return object of the top element and clean that top element result stack */
state->results.num_results--;
walk_state->result_count--;
index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
for (index = ACPI_OBJ_NUM_OPERANDS; index; index--) {
/* Check for a valid result object */
if (state->results.obj_desc[index - 1]) {
*object = state->results.obj_desc[index - 1];
state->results.obj_desc[index - 1] = NULL;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object,
(*object) ?
acpi_ut_get_object_type_name(*object)
: "NULL", (u32) index - 1, walk_state,
state->results.num_results));
return (AE_OK);
}
}
ACPI_ERROR((AE_INFO, "No result objects! State=%p", walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_pop_from_bottom
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_pop_from_bottom(union acpi_operand_object ** object,
struct acpi_walk_state * walk_state)
{
acpi_native_uint index;
union acpi_generic_state *state;
ACPI_FUNCTION_NAME(ds_result_pop_from_bottom);
state = walk_state->results;
if (!state) {
*object = state->results.obj_desc[index];
if (!*object) {
ACPI_ERROR((AE_INFO,
"No result object pushed! State=%p", walk_state));
return (AE_NOT_EXIST);
}
if (!state->results.num_results) {
ACPI_ERROR((AE_INFO, "No result objects! State=%p",
"No result objects on result stack, State=%p",
walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove Bottom element */
*object = state->results.obj_desc[0];
/* Push entire stack down one element */
for (index = 0; index < state->results.num_results; index++) {
state->results.obj_desc[index] =
state->results.obj_desc[index + 1];
state->results.obj_desc[index] = NULL;
if (index == 0) {
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_FAILURE(status)) {
return (status);
}
}
state->results.num_results--;
/* Check for a valid result object */
if (!*object) {
ACPI_ERROR((AE_INFO,
"Null operand! State=%p #Ops=%X Index=%X",
walk_state, state->results.num_results,
(u32) index));
return (AE_AML_NO_RETURN_VALUE);
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] Results=%p State=%p\n",
*object,
(*object) ? acpi_ut_get_object_type_name(*object) :
"NULL", state, walk_state));
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n", *object,
acpi_ut_get_object_type_name(*object),
(u32) index, walk_state, walk_state->result_count));
return (AE_OK);
}
@ -276,39 +145,56 @@ acpi_ds_result_push(union acpi_operand_object * object,
struct acpi_walk_state * walk_state)
{
union acpi_generic_state *state;
acpi_status status;
acpi_native_uint index;
ACPI_FUNCTION_NAME(ds_result_push);
if (walk_state->result_count > walk_state->result_size) {
ACPI_ERROR((AE_INFO, "Result stack is full"));
return (AE_AML_INTERNAL);
} else if (walk_state->result_count == walk_state->result_size) {
/* Extend the result stack */
status = acpi_ds_result_stack_push(walk_state);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO,
"Failed to extend the result stack"));
return (status);
}
}
if (!(walk_state->result_count < walk_state->result_size)) {
ACPI_ERROR((AE_INFO, "No free elements in result stack"));
return (AE_AML_INTERNAL);
}
state = walk_state->results;
if (!state) {
ACPI_ERROR((AE_INFO, "No result stack frame during push"));
return (AE_AML_INTERNAL);
}
if (state->results.num_results == ACPI_OBJ_NUM_OPERANDS) {
ACPI_ERROR((AE_INFO,
"Result stack overflow: Obj=%p State=%p Num=%X",
object, walk_state, state->results.num_results));
return (AE_STACK_OVERFLOW);
}
if (!object) {
ACPI_ERROR((AE_INFO,
"Null Object! Obj=%p State=%p Num=%X",
object, walk_state, state->results.num_results));
object, walk_state, walk_state->result_count));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc[state->results.num_results] = object;
state->results.num_results++;
/* Assign the address of object to the top free element of result stack */
index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM;
state->results.obj_desc[index] = object;
walk_state->result_count++;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object,
object ?
acpi_ut_get_object_type_name((union
acpi_operand_object *)
object) : "NULL",
walk_state, state->results.num_results,
object), walk_state,
walk_state->result_count,
walk_state->current_result));
return (AE_OK);
@ -322,16 +208,25 @@ acpi_ds_result_push(union acpi_operand_object * object,
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto the walk_state result stack.
* DESCRIPTION: Push an object onto the walk_state result stack
*
******************************************************************************/
acpi_status acpi_ds_result_stack_push(struct acpi_walk_state * walk_state)
static acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME(ds_result_stack_push);
/* Check for stack overflow */
if ((walk_state->result_size + ACPI_RESULTS_FRAME_OBJ_NUM) >
ACPI_RESULTS_OBJ_NUM_MAX) {
ACPI_ERROR((AE_INFO, "Result stack overflow: State=%p Num=%X",
walk_state, walk_state->result_size));
return (AE_STACK_OVERFLOW);
}
state = acpi_ut_create_generic_state();
if (!state) {
return (AE_NO_MEMORY);
@ -340,6 +235,10 @@ acpi_status acpi_ds_result_stack_push(struct acpi_walk_state * walk_state)
state->common.descriptor_type = ACPI_DESC_TYPE_STATE_RESULT;
acpi_ut_push_generic_state(&walk_state->results, state);
/* Increase the length of the result stack by the length of frame */
walk_state->result_size += ACPI_RESULTS_FRAME_OBJ_NUM;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Results=%p State=%p\n",
state, walk_state));
@ -354,11 +253,11 @@ acpi_status acpi_ds_result_stack_push(struct acpi_walk_state * walk_state)
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off of the walk_state result stack.
* DESCRIPTION: Pop an object off of the walk_state result stack
*
******************************************************************************/
acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state * walk_state)
static acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
@ -367,18 +266,27 @@ acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state * walk_state)
/* Check for stack underflow */
if (walk_state->results == NULL) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Underflow - State=%p\n",
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Result stack underflow - State=%p\n",
walk_state));
return (AE_AML_NO_OPERAND);
}
if (walk_state->result_size < ACPI_RESULTS_FRAME_OBJ_NUM) {
ACPI_ERROR((AE_INFO, "Insufficient result stack size"));
return (AE_AML_INTERNAL);
}
state = acpi_ut_pop_generic_state(&walk_state->results);
acpi_ut_delete_generic_state(state);
/* Decrease the length of result stack by the length of frame */
walk_state->result_size -= ACPI_RESULTS_FRAME_OBJ_NUM;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Result=%p RemainingResults=%X State=%p\n",
state, state->results.num_results, walk_state));
acpi_ut_delete_generic_state(state);
state, walk_state->result_count, walk_state));
return (AE_OK);
}
@ -412,9 +320,13 @@ acpi_ds_obj_stack_push(void *object, struct acpi_walk_state * walk_state)
/* Put the object onto the stack */
walk_state->operands[walk_state->num_operands] = object;
walk_state->operands[walk_state->operand_index] = object;
walk_state->num_operands++;
/* For the usual order of filling the operand stack */
walk_state->operand_index++;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
object,
acpi_ut_get_object_type_name((union
@ -484,43 +396,36 @@ acpi_ds_obj_stack_pop(u32 pop_count, struct acpi_walk_state * walk_state)
*
******************************************************************************/
acpi_status
void
acpi_ds_obj_stack_pop_and_delete(u32 pop_count,
struct acpi_walk_state * walk_state)
struct acpi_walk_state *walk_state)
{
u32 i;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_NAME(ds_obj_stack_pop_and_delete);
for (i = 0; i < pop_count; i++) {
/* Check for stack underflow */
if (pop_count == 0) {
return;
}
for (i = (pop_count - 1); i >= 0; i--) {
if (walk_state->num_operands == 0) {
ACPI_ERROR((AE_INFO,
"Object stack underflow! Count=%X State=%p #Ops=%X",
pop_count, walk_state,
walk_state->num_operands));
return (AE_STACK_UNDERFLOW);
return;
}
/* Pop the stack and delete an object if present in this stack entry */
walk_state->num_operands--;
obj_desc = walk_state->operands[walk_state->num_operands];
obj_desc = walk_state->operands[i];
if (obj_desc) {
acpi_ut_remove_reference(walk_state->
operands[walk_state->
num_operands]);
walk_state->operands[walk_state->num_operands] = NULL;
acpi_ut_remove_reference(walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
@ -560,7 +465,7 @@ struct acpi_walk_state *acpi_ds_get_current_walk_state(struct acpi_thread_state
*
* RETURN: None
*
* DESCRIPTION: Place the Thread state at the head of the state list.
* DESCRIPTION: Place the Thread state at the head of the state list
*
******************************************************************************/
@ -636,7 +541,6 @@ struct acpi_walk_state *acpi_ds_create_walk_state(acpi_owner_id owner_id, union
*thread)
{
struct acpi_walk_state *walk_state;
acpi_status status;
ACPI_FUNCTION_TRACE(ds_create_walk_state);
@ -659,14 +563,6 @@ struct acpi_walk_state *acpi_ds_create_walk_state(acpi_owner_id owner_id, union
acpi_ds_method_data_init(walk_state);
#endif
/* Create an initial result stack entry */
status = acpi_ds_result_stack_push(walk_state);
if (ACPI_FAILURE(status)) {
ACPI_FREE(walk_state);
return_PTR(NULL);
}
/* Put the new state at the head of the walk list */
if (thread) {
@ -860,190 +756,3 @@ void acpi_ds_delete_walk_state(struct acpi_walk_state *walk_state)
ACPI_FREE(walk_state);
return_VOID;
}
#ifdef ACPI_OBSOLETE_FUNCTIONS
/*******************************************************************************
*
* FUNCTION: acpi_ds_result_insert
*
* PARAMETERS: Object - Object to push
* Index - Where to insert the object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Insert an object onto this walk's result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_insert(void *object,
u32 index, struct acpi_walk_state *walk_state)
{
union acpi_generic_state *state;
ACPI_FUNCTION_NAME(ds_result_insert);
state = walk_state->results;
if (!state) {
ACPI_ERROR((AE_INFO, "No result object pushed! State=%p",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= ACPI_OBJ_NUM_OPERANDS) {
ACPI_ERROR((AE_INFO,
"Index out of range: %X Obj=%p State=%p Num=%X",
index, object, walk_state,
state->results.num_results));
return (AE_BAD_PARAMETER);
}
if (!object) {
ACPI_ERROR((AE_INFO,
"Null Object! Index=%X Obj=%p State=%p Num=%X",
index, object, walk_state,
state->results.num_results));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc[index] = object;
state->results.num_results++;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object,
object ?
acpi_ut_get_object_type_name((union
acpi_operand_object *)
object) : "NULL",
walk_state, state->results.num_results,
walk_state->current_result));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_delete_all
*
* PARAMETERS: walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Clear the object stack by deleting all objects that are on it.
* Should be used with great care, if at all!
*
******************************************************************************/
acpi_status acpi_ds_obj_stack_delete_all(struct acpi_walk_state * walk_state)
{
u32 i;
ACPI_FUNCTION_TRACE_PTR(ds_obj_stack_delete_all, walk_state);
/* The stack size is configurable, but fixed */
for (i = 0; i < ACPI_OBJ_NUM_OPERANDS; i++) {
if (walk_state->operands[i]) {
acpi_ut_remove_reference(walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
}
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_pop_object
*
* PARAMETERS: Object - Where to return the popped object
* walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
* deleted by this routine.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop_object(union acpi_operand_object **object,
struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_NAME(ds_obj_stack_pop_object);
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_ERROR((AE_INFO,
"Missing operand/stack empty! State=%p #Ops=%X",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Pop the stack */
walk_state->num_operands--;
/* Check for a valid operand */
if (!walk_state->operands[walk_state->num_operands]) {
ACPI_ERROR((AE_INFO,
"Null operand! State=%p #Ops=%X",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Get operand and set stack entry to null */
*object = walk_state->operands[walk_state->num_operands];
walk_state->operands[walk_state->num_operands] = NULL;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
*object, acpi_ut_get_object_type_name(*object),
walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ds_obj_stack_get_value
*
* PARAMETERS: Index - Stack index whose value is desired. Based
* on the top of the stack (index=0 == top)
* walk_state - Current Walk state
*
* RETURN: Pointer to the requested operand
*
* DESCRIPTION: Retrieve an object from this walk's operand stack. Index must
* be within the range of the current stack pointer.
*
******************************************************************************/
void *acpi_ds_obj_stack_get_value(u32 index, struct acpi_walk_state *walk_state)
{
ACPI_FUNCTION_TRACE_PTR(ds_obj_stack_get_value, walk_state);
/* Can't do it if the stack is empty */
if (walk_state->num_operands == 0) {
return_PTR(NULL);
}
/* or if the index is past the top of the stack */
if (index > (walk_state->num_operands - (u32) 1)) {
return_PTR(NULL);
}
return_PTR(walk_state->
operands[(acpi_native_uint) (walk_state->num_operands - 1) -
index]);
}
#endif

11
drivers/acpi/parser/psloop.c
View File

@ -603,13 +603,6 @@ acpi_ps_complete_op(struct acpi_walk_state *walk_state,
acpi_ps_pop_scope(&(walk_state->parser_state), op,
&walk_state->arg_types,
&walk_state->arg_count);
if ((*op)->common.aml_opcode != AML_WHILE_OP) {
status2 = acpi_ds_result_stack_pop(walk_state);
if (ACPI_FAILURE(status2)) {
return_ACPI_STATUS(status2);
}
}
}
/* Close this iteration of the While loop */
@ -640,10 +633,6 @@ acpi_ps_complete_op(struct acpi_walk_state *walk_state,
if (ACPI_FAILURE(status2)) {
return_ACPI_STATUS(status2);
}
status2 = acpi_ds_result_stack_pop(walk_state);
if (ACPI_FAILURE(status2)) {
return_ACPI_STATUS(status2);
}
acpi_ut_delete_generic_state
(acpi_ut_pop_generic_state

9
drivers/acpi/parser/psparse.c
View File

@ -349,19 +349,13 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
parser_state->aml = walk_state->aml_last_while;
walk_state->control_state->common.value = FALSE;
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_SUCCESS(status)) {
status = AE_CTRL_BREAK;
}
break;
case AE_CTRL_CONTINUE:
parser_state->aml = walk_state->aml_last_while;
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_SUCCESS(status)) {
status = AE_CTRL_CONTINUE;
}
break;
case AE_CTRL_PENDING:
@ -383,10 +377,7 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state,
* Just close out this package
*/
parser_state->aml = acpi_ps_get_next_package_end(parser_state);
status = acpi_ds_result_stack_pop(walk_state);
if (ACPI_SUCCESS(status)) {
status = AE_CTRL_PENDING;
}
break;
case AE_CTRL_FALSE:

13
include/acpi/acconfig.h
View File

@ -63,7 +63,7 @@
/* Current ACPICA subsystem version in YYYYMMDD format */
#define ACPI_CA_VERSION 0x20070126
#define ACPI_CA_VERSION 0x20070307
/*
* OS name, used for the _OS object. The _OS object is essentially obsolete,
@ -150,6 +150,17 @@
#define ACPI_OBJ_NUM_OPERANDS 8
#define ACPI_OBJ_MAX_OPERAND 7
/* Number of elements in the Result Stack frame, can be an arbitrary value */
#define ACPI_RESULTS_FRAME_OBJ_NUM 8
/*
* Maximal number of elements the Result Stack can contain,
* it may be an arbitray value not exceeding the types of
* result_size and result_count (now u8).
*/
#define ACPI_RESULTS_OBJ_NUM_MAX 255
/* Names within the namespace are 4 bytes long */
#define ACPI_NAME_SIZE 4

16
include/acpi/acdispat.h
View File

@ -303,7 +303,7 @@ acpi_ds_init_aml_walk(struct acpi_walk_state *walk_state,
u32 aml_length,
struct acpi_evaluate_info *info, u8 pass_number);
acpi_status
void
acpi_ds_obj_stack_pop_and_delete(u32 pop_count,
struct acpi_walk_state *walk_state);
@ -316,21 +316,11 @@ void
acpi_ds_push_walk_state(struct acpi_walk_state *walk_state,
struct acpi_thread_state *thread);
acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state *walk_state);
acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *walk_state);
acpi_status acpi_ds_result_stack_clear(struct acpi_walk_state *walk_state);
struct acpi_walk_state *acpi_ds_get_current_walk_state(struct acpi_thread_state
*thread);
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_ds_result_remove(union acpi_operand_object **object,
u32 index, struct acpi_walk_state *walk_state);
#endif
acpi_status
acpi_ds_result_pop(union acpi_operand_object **object,
struct acpi_walk_state *walk_state);
@ -339,8 +329,4 @@ acpi_status
acpi_ds_result_push(union acpi_operand_object *object,
struct acpi_walk_state *walk_state);
acpi_status
acpi_ds_result_pop_from_bottom(union acpi_operand_object **object,
struct acpi_walk_state *walk_state);
#endif /* _ACDISPAT_H_ */

5
include/acpi/aclocal.h
View File

@ -522,9 +522,8 @@ struct acpi_thread_state {
* AML arguments
*/
struct acpi_result_values {
ACPI_STATE_COMMON u8 num_results;
u8 last_insert;
union acpi_operand_object *obj_desc[ACPI_OBJ_NUM_OPERANDS];
ACPI_STATE_COMMON
union acpi_operand_object *obj_desc[ACPI_RESULTS_FRAME_OBJ_NUM];
};
typedef

3
include/acpi/acstruct.h
View File

@ -80,12 +80,15 @@ struct acpi_walk_state {
u16 opcode; /* Current AML opcode */
u8 next_op_info; /* Info about next_op */
u8 num_operands; /* Stack pointer for Operands[] array */
u8 operand_index; /* Index into operand stack, to be used by acpi_ds_obj_stack_push */
acpi_owner_id owner_id; /* Owner of objects created during the walk */
u8 last_predicate; /* Result of last predicate */
u8 current_result;
u8 return_used;
u8 scope_depth;
u8 pass_number; /* Parse pass during table load */
u8 result_size; /* Total elements for the result stack */
u8 result_count; /* Current number of occupied elements of result stack */
u32 aml_offset;
u32 arg_types;
u32 method_breakpoint; /* For single stepping */