676 lines
16 KiB
C
676 lines
16 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: exresop - AML Interpreter operand/object resolution
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "amlcode.h"
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#include "acparser.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("exresop")
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/* Local prototypes */
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static acpi_status
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acpi_ex_check_object_type(acpi_object_type type_needed,
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acpi_object_type this_type, void *object);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_check_object_type
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*
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* PARAMETERS: type_needed Object type needed
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* this_type Actual object type
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* Object Object pointer
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check required type against actual type
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*
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******************************************************************************/
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static acpi_status
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acpi_ex_check_object_type(acpi_object_type type_needed,
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acpi_object_type this_type, void *object)
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{
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ACPI_FUNCTION_ENTRY();
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if (type_needed == ACPI_TYPE_ANY) {
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/* All types OK, so we don't perform any typechecks */
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return (AE_OK);
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}
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if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) {
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/*
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* Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference
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* objects and thus allow them to be targets. (As per the ACPI
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* specification, a store to a constant is a noop.)
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*/
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if ((this_type == ACPI_TYPE_INTEGER) &&
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(((union acpi_operand_object *)object)->common.flags &
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AOPOBJ_AML_CONSTANT)) {
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return (AE_OK);
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}
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}
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if (type_needed != this_type) {
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ACPI_ERROR((AE_INFO,
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"Needed type [%s], found [%s] %p",
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acpi_ut_get_type_name(type_needed),
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acpi_ut_get_type_name(this_type), object));
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return (AE_AML_OPERAND_TYPE);
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_resolve_operands
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*
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* PARAMETERS: opcode - Opcode being interpreted
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* stack_ptr - Pointer to the operand stack to be
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* resolved
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* walk_state - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert multiple input operands to the types required by the
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* target operator.
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*
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* Each 5-bit group in arg_types represents one required
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* operand and indicates the required Type. The corresponding operand
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* will be converted to the required type if possible, otherwise we
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* abort with an exception.
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*
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******************************************************************************/
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acpi_status
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acpi_ex_resolve_operands(u16 opcode,
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union acpi_operand_object **stack_ptr,
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struct acpi_walk_state *walk_state)
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{
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union acpi_operand_object *obj_desc;
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acpi_status status = AE_OK;
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u8 object_type;
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u32 arg_types;
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const struct acpi_opcode_info *op_info;
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u32 this_arg_type;
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acpi_object_type type_needed;
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u16 target_op = 0;
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ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode);
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op_info = acpi_ps_get_opcode_info(opcode);
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if (op_info->class == AML_CLASS_UNKNOWN) {
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return_ACPI_STATUS(AE_AML_BAD_OPCODE);
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}
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arg_types = op_info->runtime_args;
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if (arg_types == ARGI_INVALID_OPCODE) {
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ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode));
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Opcode %X [%s] RequiredOperandTypes=%8.8X\n",
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opcode, op_info->name, arg_types));
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/*
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* Normal exit is with (arg_types == 0) at end of argument list.
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* Function will return an exception from within the loop upon
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* finding an entry which is not (or cannot be converted
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* to) the required type; if stack underflows; or upon
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* finding a NULL stack entry (which should not happen).
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*/
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while (GET_CURRENT_ARG_TYPE(arg_types)) {
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if (!stack_ptr || !*stack_ptr) {
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ACPI_ERROR((AE_INFO, "Null stack entry at %p",
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stack_ptr));
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return_ACPI_STATUS(AE_AML_INTERNAL);
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}
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/* Extract useful items */
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obj_desc = *stack_ptr;
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/* Decode the descriptor type */
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switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
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case ACPI_DESC_TYPE_NAMED:
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/* Namespace Node */
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object_type =
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((struct acpi_namespace_node *)obj_desc)->type;
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/*
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* Resolve an alias object. The construction of these objects
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* guarantees that there is only one level of alias indirection;
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* thus, the attached object is always the aliased namespace node
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*/
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if (object_type == ACPI_TYPE_LOCAL_ALIAS) {
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obj_desc = acpi_ns_get_attached_object((struct
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acpi_namespace_node
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*)
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obj_desc);
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*stack_ptr = obj_desc;
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object_type =
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((struct acpi_namespace_node *)obj_desc)->
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type;
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}
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break;
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case ACPI_DESC_TYPE_OPERAND:
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/* ACPI internal object */
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object_type = obj_desc->common.type;
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/* Check for bad acpi_object_type */
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if (!acpi_ut_valid_object_type(object_type)) {
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ACPI_ERROR((AE_INFO,
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"Bad operand object type [0x%X]",
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object_type));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) {
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/* Validate the Reference */
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switch (obj_desc->reference.class) {
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case ACPI_REFCLASS_DEBUG:
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target_op = AML_DEBUG_OP;
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ACPI_FALLTHROUGH;
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case ACPI_REFCLASS_ARG:
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case ACPI_REFCLASS_LOCAL:
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case ACPI_REFCLASS_INDEX:
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case ACPI_REFCLASS_REFOF:
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case ACPI_REFCLASS_TABLE: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */
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case ACPI_REFCLASS_NAME: /* Reference to a named object */
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
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"Operand is a Reference, Class [%s] %2.2X\n",
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acpi_ut_get_reference_name
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(obj_desc),
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obj_desc->reference.
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class));
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break;
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default:
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ACPI_ERROR((AE_INFO,
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"Unknown Reference Class 0x%2.2X in %p",
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obj_desc->reference.class,
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obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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}
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break;
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default:
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/* Invalid descriptor */
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ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]",
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obj_desc,
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acpi_ut_get_descriptor_name(obj_desc)));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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/* Get one argument type, point to the next */
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this_arg_type = GET_CURRENT_ARG_TYPE(arg_types);
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INCREMENT_ARG_LIST(arg_types);
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/*
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* Handle cases where the object does not need to be
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* resolved to a value
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*/
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switch (this_arg_type) {
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case ARGI_REF_OR_STRING: /* Can be a String or Reference */
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if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
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ACPI_DESC_TYPE_OPERAND) &&
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(obj_desc->common.type == ACPI_TYPE_STRING)) {
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/*
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* String found - the string references a named object and
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* must be resolved to a node
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*/
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goto next_operand;
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}
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/*
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* Else not a string - fall through to the normal Reference
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* case below
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*/
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ACPI_FALLTHROUGH;
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case ARGI_REFERENCE: /* References: */
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case ARGI_INTEGER_REF:
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case ARGI_OBJECT_REF:
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case ARGI_DEVICE_REF:
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case ARGI_TARGETREF: /* Allows implicit conversion rules before store */
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case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */
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case ARGI_SIMPLE_TARGET: /* Name, Local, or arg - no implicit conversion */
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case ARGI_STORE_TARGET:
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/*
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* Need an operand of type ACPI_TYPE_LOCAL_REFERENCE
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* A Namespace Node is OK as-is
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*/
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if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) ==
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ACPI_DESC_TYPE_NAMED) {
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goto next_operand;
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}
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status =
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acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE,
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object_type, obj_desc);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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goto next_operand;
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case ARGI_DATAREFOBJ: /* Store operator only */
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/*
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* We don't want to resolve index_op reference objects during
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* a store because this would be an implicit de_ref_of operation.
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* Instead, we just want to store the reference object.
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* -- All others must be resolved below.
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*/
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if ((opcode == AML_STORE_OP) &&
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((*stack_ptr)->common.type ==
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ACPI_TYPE_LOCAL_REFERENCE)
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&& ((*stack_ptr)->reference.class ==
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ACPI_REFCLASS_INDEX)) {
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goto next_operand;
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}
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break;
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default:
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/* All cases covered above */
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break;
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}
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/*
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* Resolve this object to a value
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*/
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status = acpi_ex_resolve_to_value(stack_ptr, walk_state);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Get the resolved object */
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obj_desc = *stack_ptr;
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/*
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* Check the resulting object (value) type
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*/
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switch (this_arg_type) {
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/*
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* For the simple cases, only one type of resolved object
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* is allowed
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*/
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case ARGI_MUTEX:
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/* Need an operand of type ACPI_TYPE_MUTEX */
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type_needed = ACPI_TYPE_MUTEX;
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break;
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case ARGI_EVENT:
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/* Need an operand of type ACPI_TYPE_EVENT */
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type_needed = ACPI_TYPE_EVENT;
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break;
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case ARGI_PACKAGE: /* Package */
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/* Need an operand of type ACPI_TYPE_PACKAGE */
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type_needed = ACPI_TYPE_PACKAGE;
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break;
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case ARGI_ANYTYPE:
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/* Any operand type will do */
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type_needed = ACPI_TYPE_ANY;
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break;
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case ARGI_DDBHANDLE:
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/* Need an operand of type ACPI_TYPE_DDB_HANDLE */
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type_needed = ACPI_TYPE_LOCAL_REFERENCE;
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break;
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/*
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* The more complex cases allow multiple resolved object types
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*/
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case ARGI_INTEGER:
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/*
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* Need an operand of type ACPI_TYPE_INTEGER, but we can
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* implicitly convert from a STRING or BUFFER.
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*
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* Known as "Implicit Source Operand Conversion"
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*/
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status = acpi_ex_convert_to_integer(obj_desc, stack_ptr,
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ACPI_IMPLICIT_CONVERSION);
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if (ACPI_FAILURE(status)) {
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if (status == AE_TYPE) {
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ACPI_ERROR((AE_INFO,
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"Needed [Integer/String/Buffer], found [%s] %p",
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acpi_ut_get_object_type_name
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(obj_desc), obj_desc));
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
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}
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return_ACPI_STATUS(status);
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}
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if (obj_desc != *stack_ptr) {
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_BUFFER:
|
||
|
|
/*
|
||
|
|
* Need an operand of type ACPI_TYPE_BUFFER,
|
||
|
|
* But we can implicitly convert from a STRING or INTEGER
|
||
|
|
* aka - "Implicit Source Operand Conversion"
|
||
|
|
*/
|
||
|
|
status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
if (status == AE_TYPE) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Integer/String/Buffer], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (obj_desc != *stack_ptr) {
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_STRING:
|
||
|
|
/*
|
||
|
|
* Need an operand of type ACPI_TYPE_STRING,
|
||
|
|
* But we can implicitly convert from a BUFFER or INTEGER
|
||
|
|
* aka - "Implicit Source Operand Conversion"
|
||
|
|
*/
|
||
|
|
status =
|
||
|
|
acpi_ex_convert_to_string(obj_desc, stack_ptr,
|
||
|
|
ACPI_IMPLICIT_CONVERT_HEX);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
if (status == AE_TYPE) {
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Integer/String/Buffer], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (obj_desc != *stack_ptr) {
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_COMPUTEDATA:
|
||
|
|
|
||
|
|
/* Need an operand of type INTEGER, STRING or BUFFER */
|
||
|
|
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_INTEGER:
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Integer/String/Buffer], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_BUFFER_OR_STRING:
|
||
|
|
|
||
|
|
/* Need an operand of type STRING or BUFFER */
|
||
|
|
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_INTEGER:
|
||
|
|
|
||
|
|
/* Highest priority conversion is to type Buffer */
|
||
|
|
|
||
|
|
status =
|
||
|
|
acpi_ex_convert_to_buffer(obj_desc,
|
||
|
|
stack_ptr);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (obj_desc != *stack_ptr) {
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Integer/String/Buffer], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_DATAOBJECT:
|
||
|
|
/*
|
||
|
|
* ARGI_DATAOBJECT is only used by the size_of operator.
|
||
|
|
* Need a buffer, string, package, or ref_of reference.
|
||
|
|
*
|
||
|
|
* The only reference allowed here is a direct reference to
|
||
|
|
* a namespace node.
|
||
|
|
*/
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_PACKAGE:
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Buffer/String/Package/Reference], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_COMPLEXOBJ:
|
||
|
|
|
||
|
|
/* Need a buffer or package or (ACPI 2.0) String */
|
||
|
|
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_PACKAGE:
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Buffer/String/Package], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_REGION_OR_BUFFER: /* Used by Load() only */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Need an operand of type REGION or a BUFFER
|
||
|
|
* (which could be a resolved region field)
|
||
|
|
*/
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
case ACPI_TYPE_REGION:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed [Region/Buffer], found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
case ARGI_DATAREFOBJ:
|
||
|
|
|
||
|
|
/* Used by the Store() operator only */
|
||
|
|
|
||
|
|
switch (obj_desc->common.type) {
|
||
|
|
case ACPI_TYPE_INTEGER:
|
||
|
|
case ACPI_TYPE_PACKAGE:
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
||
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
||
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
||
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
||
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
||
|
|
case ACPI_TYPE_DDB_HANDLE:
|
||
|
|
|
||
|
|
/* Valid operand */
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
if (acpi_gbl_enable_interpreter_slack) {
|
||
|
|
/*
|
||
|
|
* Enable original behavior of Store(), allowing any
|
||
|
|
* and all objects as the source operand. The ACPI
|
||
|
|
* spec does not allow this, however.
|
||
|
|
*/
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (target_op == AML_DEBUG_OP) {
|
||
|
|
|
||
|
|
/* Allow store of any object to the Debug object */
|
||
|
|
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Needed Integer/Buffer/String/Package/Ref/Ddb]"
|
||
|
|
", found [%s] %p",
|
||
|
|
acpi_ut_get_object_type_name
|
||
|
|
(obj_desc), obj_desc));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
|
||
|
|
}
|
||
|
|
goto next_operand;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
/* Unknown type */
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Internal - Unknown ARGI (required operand) type 0x%X",
|
||
|
|
this_arg_type));
|
||
|
|
|
||
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Make sure that the original object was resolved to the
|
||
|
|
* required object type (Simple cases only).
|
||
|
|
*/
|
||
|
|
status =
|
||
|
|
acpi_ex_check_object_type(type_needed,
|
||
|
|
(*stack_ptr)->common.type,
|
||
|
|
*stack_ptr);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
next_operand:
|
||
|
|
/*
|
||
|
|
* If more operands needed, decrement stack_ptr to point
|
||
|
|
* to next operand on stack
|
||
|
|
*/
|
||
|
|
if (GET_CURRENT_ARG_TYPE(arg_types)) {
|
||
|
|
stack_ptr--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_DUMP_OPERANDS(walk_state->operands,
|
||
|
|
acpi_ps_get_opcode_name(opcode),
|
||
|
|
walk_state->num_operands);
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|