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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

15
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;
}
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;
}
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;
}
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 */