/******************************************************************************
*
* Module Name: exconcat - Concatenate-type AML operators
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2019, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acinterp.h"
#include "amlresrc.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME ("exconcat")
/* Local Prototypes */
static ACPI_STATUS
AcpiExConvertToObjectTypeString (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ResultDesc);
/*******************************************************************************
*
* FUNCTION: AcpiExDoConcatenate
*
* PARAMETERS: Operand0 - First source object
* Operand1 - Second source object
* ActualReturnDesc - Where to place the return object
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Concatenate two objects with the ACPI-defined conversion
* rules as necessary.
* NOTE:
* Per the ACPI spec (up to 6.1), Concatenate only supports Integer,
* String, and Buffer objects. However, we support all objects here
* as an extension. This improves the usefulness of both Concatenate
* and the Printf/Fprintf macros. The extension returns a string
* describing the object type for the other objects.
* 02/2016.
*
******************************************************************************/
ACPI_STATUS
AcpiExDoConcatenate (
ACPI_OPERAND_OBJECT *Operand0,
ACPI_OPERAND_OBJECT *Operand1,
ACPI_OPERAND_OBJECT **ActualReturnDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT *LocalOperand0 = Operand0;
ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1;
ACPI_OPERAND_OBJECT *TempOperand1 = NULL;
ACPI_OPERAND_OBJECT *ReturnDesc;
char *Buffer;
ACPI_OBJECT_TYPE Operand0Type;
ACPI_OBJECT_TYPE Operand1Type;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (ExDoConcatenate);
/* Operand 0 preprocessing */
switch (Operand0->Common.Type)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
Operand0Type = Operand0->Common.Type;
break;
default:
/* For all other types, get the "object type" string */
Status = AcpiExConvertToObjectTypeString (
Operand0, &LocalOperand0);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Operand0Type = ACPI_TYPE_STRING;
break;
}
/* Operand 1 preprocessing */
switch (Operand1->Common.Type)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
Operand1Type = Operand1->Common.Type;
break;
default:
/* For all other types, get the "object type" string */
Status = AcpiExConvertToObjectTypeString (
Operand1, &LocalOperand1);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
Operand1Type = ACPI_TYPE_STRING;
break;
}
/*
* Convert the second operand if necessary. The first operand (0)
* determines the type of the second operand (1) (See the Data Types
* section of the ACPI specification). Both object types are
* guaranteed to be either Integer/String/Buffer by the operand
* resolution mechanism.
*/
switch (Operand0Type)
{
case ACPI_TYPE_INTEGER:
Status = AcpiExConvertToInteger (LocalOperand1, &TempOperand1,
ACPI_IMPLICIT_CONVERSION);
break;
case ACPI_TYPE_BUFFER:
Status = AcpiExConvertToBuffer (LocalOperand1, &TempOperand1);
break;
case ACPI_TYPE_STRING:
switch (Operand1Type)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/* Other types have already been converted to string */
Status = AcpiExConvertToString (
LocalOperand1, &TempOperand1, ACPI_IMPLICIT_CONVERT_HEX);
break;
default:
Status = AE_OK;
break;
}
break;
default:
ACPI_ERROR ((AE_INFO, "Invalid object type: 0x%X",
Operand0->Common.Type));
Status = AE_AML_INTERNAL;
}
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Take care with any newly created operand objects */
if ((LocalOperand1 != Operand1) &&
(LocalOperand1 != TempOperand1))
{
AcpiUtRemoveReference (LocalOperand1);
}
LocalOperand1 = TempOperand1;
/*
* Both operands are now known to be the same object type
* (Both are Integer, String, or Buffer), and we can now perform
* the concatenation.
*
* There are three cases to handle, as per the ACPI spec:
*
* 1) Two Integers concatenated to produce a new Buffer
* 2) Two Strings concatenated to produce a new String
* 3) Two Buffers concatenated to produce a new Buffer
*/
switch (Operand0Type)
{
case ACPI_TYPE_INTEGER:
/* Result of two Integers is a Buffer */
/* Need enough buffer space for two integers */
ReturnDesc = AcpiUtCreateBufferObject (
(ACPI_SIZE) ACPI_MUL_2 (AcpiGbl_IntegerByteWidth));
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
Buffer = (char *) ReturnDesc->Buffer.Pointer;
/* Copy the first integer, LSB first */
memcpy (Buffer, &Operand0->Integer.Value,
AcpiGbl_IntegerByteWidth);
/* Copy the second integer (LSB first) after the first */
memcpy (Buffer + AcpiGbl_IntegerByteWidth,
&LocalOperand1->Integer.Value, AcpiGbl_IntegerByteWidth);
break;
case ACPI_TYPE_STRING:
/* Result of two Strings is a String */
ReturnDesc = AcpiUtCreateStringObject (
((ACPI_SIZE) LocalOperand0->String.Length +
LocalOperand1->String.Length));
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
Buffer = ReturnDesc->String.Pointer;
/* Concatenate the strings */
strcpy (Buffer, LocalOperand0->String.Pointer);
strcat (Buffer, LocalOperand1->String.Pointer);
break;
case ACPI_TYPE_BUFFER:
/* Result of two Buffers is a Buffer */
ReturnDesc = AcpiUtCreateBufferObject (
((ACPI_SIZE) Operand0->Buffer.Length +
LocalOperand1->Buffer.Length));
if (!ReturnDesc)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
Buffer = (char *) ReturnDesc->Buffer.Pointer;
/* Concatenate the buffers */
memcpy (Buffer, Operand0->Buffer.Pointer,
Operand0->Buffer.Length);
memcpy (Buffer + Operand0->Buffer.Length,
LocalOperand1->Buffer.Pointer,
LocalOperand1->Buffer.Length);
break;
default:
/* Invalid object type, should not happen here */
ACPI_ERROR ((AE_INFO, "Invalid object type: 0x%X",
Operand0->Common.Type));
Status = AE_AML_INTERNAL;
goto Cleanup;
}
*ActualReturnDesc = ReturnDesc;
Cleanup:
if (LocalOperand0 != Operand0)
{
AcpiUtRemoveReference (LocalOperand0);
}
if (LocalOperand1 != Operand1)
{
AcpiUtRemoveReference (LocalOperand1);
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConvertToObjectTypeString
*
* PARAMETERS: ObjDesc - Object to be converted
* ReturnDesc - Where to place the return object
*
* RETURN: Status
*
* DESCRIPTION: Convert an object of arbitrary type to a string object that
* contains the namestring for the object. Used for the
* concatenate operator.
*
******************************************************************************/
static ACPI_STATUS
AcpiExConvertToObjectTypeString (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT **ResultDesc)
{
ACPI_OPERAND_OBJECT *ReturnDesc;
const char *TypeString;
TypeString = AcpiUtGetTypeName (ObjDesc->Common.Type);
ReturnDesc = AcpiUtCreateStringObject (
((ACPI_SIZE) strlen (TypeString) + 9)); /* 9 For "[ Object]" */
if (!ReturnDesc)
{
return (AE_NO_MEMORY);
}
strcpy (ReturnDesc->String.Pointer, "[");
strcat (ReturnDesc->String.Pointer, TypeString);
strcat (ReturnDesc->String.Pointer, " Object]");
*ResultDesc = ReturnDesc;
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiExConcatTemplate
*
* PARAMETERS: Operand0 - First source object
* Operand1 - Second source object
* ActualReturnDesc - Where to place the return object
* WalkState - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: Concatenate two resource templates
*
******************************************************************************/
ACPI_STATUS
AcpiExConcatTemplate (
ACPI_OPERAND_OBJECT *Operand0,
ACPI_OPERAND_OBJECT *Operand1,
ACPI_OPERAND_OBJECT **ActualReturnDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status;
ACPI_OPERAND_OBJECT *ReturnDesc;
UINT8 *NewBuf;
UINT8 *EndTag;
ACPI_SIZE Length0;
ACPI_SIZE Length1;
ACPI_SIZE NewLength;
ACPI_FUNCTION_TRACE (ExConcatTemplate);
/*
* Find the EndTag descriptor in each resource template.
* Note1: returned pointers point TO the EndTag, not past it.
* Note2: zero-length buffers are allowed; treated like one EndTag
*/
/* Get the length of the first resource template */
Status = AcpiUtGetResourceEndTag (Operand0, &EndTag);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Length0 = ACPI_PTR_DIFF (EndTag, Operand0->Buffer.Pointer);
/* Get the length of the second resource template */
Status = AcpiUtGetResourceEndTag (Operand1, &EndTag);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Length1 = ACPI_PTR_DIFF (EndTag, Operand1->Buffer.Pointer);
/* Combine both lengths, minimum size will be 2 for EndTag */
NewLength = Length0 + Length1 + sizeof (AML_RESOURCE_END_TAG);
/* Create a new buffer object for the result (with one EndTag) */
ReturnDesc = AcpiUtCreateBufferObject (NewLength);
if (!ReturnDesc)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Copy the templates to the new buffer, 0 first, then 1 follows. One
* EndTag descriptor is copied from Operand1.
*/
NewBuf = ReturnDesc->Buffer.Pointer;
memcpy (NewBuf, Operand0->Buffer.Pointer, Length0);
memcpy (NewBuf + Length0, Operand1->Buffer.Pointer, Length1);
/* Insert EndTag and set the checksum to zero, means "ignore checksum" */
NewBuf[NewLength - 1] = 0;
NewBuf[NewLength - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
/* Return the completed resource template */
*ActualReturnDesc = ReturnDesc;
return_ACPI_STATUS (AE_OK);
}