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675 lines
16 KiB
675 lines
16 KiB
// 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 - 2021, Intel Corp. |
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* |
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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) { |
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acpi_ut_remove_reference(obj_desc); |
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} |
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goto next_operand; |
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case ARGI_BUFFER: |
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/* |
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* Need an operand of type ACPI_TYPE_BUFFER, |
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* But we can implicitly convert from a STRING or INTEGER |
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* aka - "Implicit Source Operand Conversion" |
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*/ |
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status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr); |
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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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|
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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) { |
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acpi_ut_remove_reference(obj_desc); |
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} |
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goto next_operand; |
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|
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case ARGI_STRING: |
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/* |
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* Need an operand of type ACPI_TYPE_STRING, |
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* But we can implicitly convert from a BUFFER or INTEGER |
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* aka - "Implicit Source Operand Conversion" |
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*/ |
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status = |
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acpi_ex_convert_to_string(obj_desc, stack_ptr, |
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ACPI_IMPLICIT_CONVERT_HEX); |
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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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|
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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) { |
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acpi_ut_remove_reference(obj_desc); |
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} |
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goto next_operand; |
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|
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case ARGI_COMPUTEDATA: |
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|
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/* Need an operand of type INTEGER, STRING or BUFFER */ |
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_INTEGER: |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
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|
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/* Valid operand */ |
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break; |
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|
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default: |
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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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|
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
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goto next_operand; |
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|
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case ARGI_BUFFER_OR_STRING: |
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|
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/* Need an operand of type STRING or BUFFER */ |
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
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|
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/* Valid operand */ |
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break; |
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|
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case ACPI_TYPE_INTEGER: |
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|
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/* Highest priority conversion is to type Buffer */ |
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status = |
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acpi_ex_convert_to_buffer(obj_desc, |
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stack_ptr); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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|
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if (obj_desc != *stack_ptr) { |
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acpi_ut_remove_reference(obj_desc); |
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} |
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break; |
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|
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default: |
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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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|
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
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goto next_operand; |
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|
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case ARGI_DATAOBJECT: |
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/* |
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* ARGI_DATAOBJECT is only used by the size_of operator. |
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* Need a buffer, string, package, or ref_of reference. |
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* |
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* The only reference allowed here is a direct reference to |
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* a namespace node. |
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*/ |
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_PACKAGE: |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
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case ACPI_TYPE_LOCAL_REFERENCE: |
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|
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/* Valid operand */ |
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break; |
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|
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default: |
|
|
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ACPI_ERROR((AE_INFO, |
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"Needed [Buffer/String/Package/Reference], 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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|
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
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goto next_operand; |
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|
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case ARGI_COMPLEXOBJ: |
|
|
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/* Need a buffer or package or (ACPI 2.0) String */ |
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|
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_PACKAGE: |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
|
|
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/* Valid operand */ |
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break; |
|
|
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default: |
|
|
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ACPI_ERROR((AE_INFO, |
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"Needed [Buffer/String/Package], 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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goto next_operand; |
|
|
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case ARGI_REGION_OR_BUFFER: /* Used by Load() only */ |
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|
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/* |
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* Need an operand of type REGION or a BUFFER |
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* (which could be a resolved region field) |
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*/ |
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_BUFFER: |
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case ACPI_TYPE_REGION: |
|
|
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/* Valid operand */ |
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break; |
|
|
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default: |
|
|
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ACPI_ERROR((AE_INFO, |
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"Needed [Region/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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|
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
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goto next_operand; |
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|
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case ARGI_DATAREFOBJ: |
|
|
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/* Used by the Store() operator only */ |
|
|
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switch (obj_desc->common.type) { |
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case ACPI_TYPE_INTEGER: |
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case ACPI_TYPE_PACKAGE: |
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case ACPI_TYPE_STRING: |
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case ACPI_TYPE_BUFFER: |
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case ACPI_TYPE_BUFFER_FIELD: |
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case ACPI_TYPE_LOCAL_REFERENCE: |
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case ACPI_TYPE_LOCAL_REGION_FIELD: |
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case ACPI_TYPE_LOCAL_BANK_FIELD: |
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case ACPI_TYPE_LOCAL_INDEX_FIELD: |
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case ACPI_TYPE_DDB_HANDLE: |
|
|
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/* Valid operand */ |
|
break; |
|
|
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default: |
|
|
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if (acpi_gbl_enable_interpreter_slack) { |
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/* |
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* Enable original behavior of Store(), allowing any |
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* and all objects as the source operand. The ACPI |
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* spec does not allow this, however. |
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*/ |
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break; |
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} |
|
|
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if (target_op == AML_DEBUG_OP) { |
|
|
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/* Allow store of any object to the Debug object */ |
|
|
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break; |
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} |
|
|
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ACPI_ERROR((AE_INFO, |
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"Needed Integer/Buffer/String/Package/Ref/Ddb]" |
|
", found [%s] %p", |
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acpi_ut_get_object_type_name |
|
(obj_desc), obj_desc)); |
|
|
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return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
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} |
|
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); |
|
}
|
|
|