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732 lines
22 KiB
C
732 lines
22 KiB
C
/******************************************************************************
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*
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* Module Name: exresop - AML Interpreter operand/object resolution
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2021, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "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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AcpiExCheckObjectType (
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ACPI_OBJECT_TYPE TypeNeeded,
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ACPI_OBJECT_TYPE ThisType,
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void *Object);
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/*******************************************************************************
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*
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* FUNCTION: AcpiExCheckObjectType
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*
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* PARAMETERS: TypeNeeded Object type needed
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* ThisType 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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AcpiExCheckObjectType (
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ACPI_OBJECT_TYPE TypeNeeded,
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ACPI_OBJECT_TYPE ThisType,
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void *Object)
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{
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ACPI_FUNCTION_ENTRY ();
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if (TypeNeeded == ACPI_TYPE_ANY)
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{
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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 (TypeNeeded == ACPI_TYPE_LOCAL_REFERENCE)
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{
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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 ((ThisType == ACPI_TYPE_INTEGER) &&
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(((ACPI_OPERAND_OBJECT *) Object)->Common.Flags &
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AOPOBJ_AML_CONSTANT))
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{
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return (AE_OK);
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}
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}
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if (TypeNeeded != ThisType)
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{
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ACPI_ERROR ((AE_INFO,
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"Needed type [%s], found [%s] %p",
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AcpiUtGetTypeName (TypeNeeded),
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AcpiUtGetTypeName (ThisType), 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: AcpiExResolveOperands
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*
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* PARAMETERS: Opcode - Opcode being interpreted
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* StackPtr - Pointer to the operand stack to be
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* resolved
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* WalkState - 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 ArgTypes 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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AcpiExResolveOperands (
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UINT16 Opcode,
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ACPI_OPERAND_OBJECT **StackPtr,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_STATUS Status = AE_OK;
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UINT8 ObjectType;
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UINT32 ArgTypes;
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const ACPI_OPCODE_INFO *OpInfo;
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UINT32 ThisArgType;
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ACPI_OBJECT_TYPE TypeNeeded;
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UINT16 TargetOp = 0;
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ACPI_FUNCTION_TRACE_U32 (ExResolveOperands, Opcode);
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OpInfo = AcpiPsGetOpcodeInfo (Opcode);
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if (OpInfo->Class == AML_CLASS_UNKNOWN)
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{
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return_ACPI_STATUS (AE_AML_BAD_OPCODE);
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}
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ArgTypes = OpInfo->RuntimeArgs;
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if (ArgTypes == ARGI_INVALID_OPCODE)
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{
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ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
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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, OpInfo->Name, ArgTypes));
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/*
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* Normal exit is with (ArgTypes == 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 (ArgTypes))
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{
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if (!StackPtr || !*StackPtr)
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{
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ACPI_ERROR ((AE_INFO, "Null stack entry at %p",
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StackPtr));
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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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ObjDesc = *StackPtr;
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/* Decode the descriptor type */
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switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
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{
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case ACPI_DESC_TYPE_NAMED:
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/* Namespace Node */
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ObjectType = ((ACPI_NAMESPACE_NODE *) ObjDesc)->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 (ObjectType == ACPI_TYPE_LOCAL_ALIAS)
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{
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ObjDesc = AcpiNsGetAttachedObject (
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(ACPI_NAMESPACE_NODE *) ObjDesc);
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*StackPtr = ObjDesc;
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ObjectType = ((ACPI_NAMESPACE_NODE *) ObjDesc)->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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ObjectType = ObjDesc->Common.Type;
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/* Check for bad ACPI_OBJECT_TYPE */
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if (!AcpiUtValidObjectType (ObjectType))
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{
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ACPI_ERROR ((AE_INFO,
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"Bad operand object type [0x%X]", ObjectType));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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if (ObjectType == (UINT8) ACPI_TYPE_LOCAL_REFERENCE)
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{
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/* Validate the Reference */
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switch (ObjDesc->Reference.Class)
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{
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case ACPI_REFCLASS_DEBUG:
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TargetOp = 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: /* DdbHandle 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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AcpiUtGetReferenceName (ObjDesc),
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ObjDesc->Reference.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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ObjDesc->Reference.Class, ObjDesc));
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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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ObjDesc, AcpiUtGetDescriptorName (ObjDesc)));
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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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ThisArgType = GET_CURRENT_ARG_TYPE (ArgTypes);
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INCREMENT_ARG_LIST (ArgTypes);
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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 (ThisArgType)
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{
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case ARGI_REF_OR_STRING: /* Can be a String or Reference */
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if ((ACPI_GET_DESCRIPTOR_TYPE (ObjDesc) ==
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ACPI_DESC_TYPE_OPERAND) &&
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(ObjDesc->Common.Type == ACPI_TYPE_STRING))
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{
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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 NextOperand;
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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 (ObjDesc) == ACPI_DESC_TYPE_NAMED)
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{
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goto NextOperand;
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}
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Status = AcpiExCheckObjectType (
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ACPI_TYPE_LOCAL_REFERENCE, ObjectType, ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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goto NextOperand;
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case ARGI_DATAREFOBJ: /* Store operator only */
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/*
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* We don't want to resolve IndexOp reference objects during
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* a store because this would be an implicit DeRefOf 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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((*StackPtr)->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) &&
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((*StackPtr)->Reference.Class == ACPI_REFCLASS_INDEX))
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{
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goto NextOperand;
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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 = AcpiExResolveToValue (StackPtr, WalkState);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Get the resolved object */
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ObjDesc = *StackPtr;
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/*
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* Check the resulting object (value) type
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*/
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switch (ThisArgType)
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{
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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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TypeNeeded = 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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TypeNeeded = 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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TypeNeeded = 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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TypeNeeded = 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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TypeNeeded = 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 = AcpiExConvertToInteger (ObjDesc, StackPtr,
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ACPI_IMPLICIT_CONVERSION);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_TYPE)
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{
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ACPI_ERROR ((AE_INFO,
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"Needed [Integer/String/Buffer], found [%s] %p",
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AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
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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 (ObjDesc != *StackPtr)
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{
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AcpiUtRemoveReference (ObjDesc);
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}
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goto NextOperand;
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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 = AcpiExConvertToBuffer (ObjDesc, StackPtr);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_TYPE)
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{
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ACPI_ERROR ((AE_INFO,
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"Needed [Integer/String/Buffer], found [%s] %p",
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AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
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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 (ObjDesc != *StackPtr)
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{
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AcpiUtRemoveReference (ObjDesc);
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}
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goto NextOperand;
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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 = AcpiExConvertToString (
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ObjDesc, StackPtr, ACPI_IMPLICIT_CONVERT_HEX);
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if (ACPI_FAILURE (Status))
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{
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if (Status == AE_TYPE)
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{
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ACPI_ERROR ((AE_INFO,
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"Needed [Integer/String/Buffer], found [%s] %p",
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AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
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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 (ObjDesc != *StackPtr)
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{
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AcpiUtRemoveReference (ObjDesc);
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}
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goto NextOperand;
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case ARGI_COMPUTEDATA:
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/* Need an operand of type INTEGER, STRING or BUFFER */
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switch (ObjDesc->Common.Type)
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{
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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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/* 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 [Integer/String/Buffer], found [%s] %p",
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AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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goto NextOperand;
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case ARGI_BUFFER_OR_STRING:
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/* Need an operand of type STRING or BUFFER */
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switch (ObjDesc->Common.Type)
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{
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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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case ACPI_TYPE_INTEGER:
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/* Highest priority conversion is to type Buffer */
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Status = AcpiExConvertToBuffer (ObjDesc, StackPtr);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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if (ObjDesc != *StackPtr)
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{
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AcpiUtRemoveReference (ObjDesc);
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}
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break;
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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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AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
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return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
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}
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goto NextOperand;
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case ARGI_DATAOBJECT:
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/*
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* ARGI_DATAOBJECT is only used by the SizeOf operator.
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* Need a buffer, string, package, or RefOf 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 (ObjDesc->Common.Type)
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{
|
|
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",
|
|
AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto NextOperand;
|
|
|
|
case ARGI_COMPLEXOBJ:
|
|
|
|
/* Need a buffer or package or (ACPI 2.0) String */
|
|
|
|
switch (ObjDesc->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",
|
|
AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto NextOperand;
|
|
|
|
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 (ObjDesc->Common.Type)
|
|
{
|
|
case ACPI_TYPE_BUFFER:
|
|
case ACPI_TYPE_REGION:
|
|
|
|
/* Valid operand */
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Needed [Region/Buffer], found [%s] %p",
|
|
AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto NextOperand;
|
|
|
|
case ARGI_DATAREFOBJ:
|
|
|
|
/* Used by the Store() operator only */
|
|
|
|
switch (ObjDesc->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 (AcpiGbl_EnableInterpreterSlack)
|
|
{
|
|
/*
|
|
* Enable original behavior of Store(), allowing any
|
|
* and all objects as the source operand. The ACPI
|
|
* spec does not allow this, however.
|
|
*/
|
|
break;
|
|
}
|
|
|
|
if (TargetOp == 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",
|
|
AcpiUtGetObjectTypeName (ObjDesc), ObjDesc));
|
|
|
|
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
|
|
}
|
|
goto NextOperand;
|
|
|
|
default:
|
|
|
|
/* Unknown type */
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Internal - Unknown ARGI (required operand) type 0x%X",
|
|
ThisArgType));
|
|
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Make sure that the original object was resolved to the
|
|
* required object type (Simple cases only).
|
|
*/
|
|
Status = AcpiExCheckObjectType (
|
|
TypeNeeded, (*StackPtr)->Common.Type, *StackPtr);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
NextOperand:
|
|
/*
|
|
* If more operands needed, decrement StackPtr to point
|
|
* to next operand on stack
|
|
*/
|
|
if (GET_CURRENT_ARG_TYPE (ArgTypes))
|
|
{
|
|
StackPtr--;
|
|
}
|
|
}
|
|
|
|
ACPI_DUMP_OPERANDS (WalkState->Operands,
|
|
AcpiPsGetOpcodeName (Opcode), WalkState->NumOperands);
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|