425 lines
11 KiB
C
425 lines
11 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: dtexpress.c - Support for integer expressions and labels
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2015, 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 "aslcompiler.h"
|
|
#include "dtcompiler.h"
|
|
#include "dtparser.y.h"
|
|
|
|
#define _COMPONENT DT_COMPILER
|
|
ACPI_MODULE_NAME ("dtexpress")
|
|
|
|
|
|
/* Local prototypes */
|
|
|
|
static void
|
|
DtInsertLabelField (
|
|
DT_FIELD *Field);
|
|
|
|
static DT_FIELD *
|
|
DtLookupLabel (
|
|
char *Name);
|
|
|
|
/* Global used for errors during parse and related functions */
|
|
|
|
DT_FIELD *Gbl_CurrentField;
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtResolveIntegerExpression
|
|
*
|
|
* PARAMETERS: Field - Field object with Integer expression
|
|
* ReturnValue - Where the integer is returned
|
|
*
|
|
* RETURN: Status, and the resolved 64-bit integer value
|
|
*
|
|
* DESCRIPTION: Resolve an integer expression to a single value. Supports
|
|
* both integer constants and labels.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
DtResolveIntegerExpression (
|
|
DT_FIELD *Field,
|
|
UINT64 *ReturnValue)
|
|
{
|
|
UINT64 Result;
|
|
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, "Full Integer expression: %s\n",
|
|
Field->Value);
|
|
|
|
Gbl_CurrentField = Field;
|
|
|
|
Result = DtEvaluateExpression (Field->Value);
|
|
*ReturnValue = Result;
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtDoOperator
|
|
*
|
|
* PARAMETERS: LeftValue - First 64-bit operand
|
|
* Operator - Parse token for the operator (EXPOP_*)
|
|
* RightValue - Second 64-bit operand
|
|
*
|
|
* RETURN: 64-bit result of the requested operation
|
|
*
|
|
* DESCRIPTION: Perform the various 64-bit integer math functions
|
|
*
|
|
*****************************************************************************/
|
|
|
|
UINT64
|
|
DtDoOperator (
|
|
UINT64 LeftValue,
|
|
UINT32 Operator,
|
|
UINT64 RightValue)
|
|
{
|
|
UINT64 Result;
|
|
|
|
|
|
/* Perform the requested operation */
|
|
|
|
switch (Operator)
|
|
{
|
|
case EXPOP_ONES_COMPLIMENT:
|
|
|
|
Result = ~RightValue;
|
|
break;
|
|
|
|
case EXPOP_LOGICAL_NOT:
|
|
|
|
Result = !RightValue;
|
|
break;
|
|
|
|
case EXPOP_MULTIPLY:
|
|
|
|
Result = LeftValue * RightValue;
|
|
break;
|
|
|
|
case EXPOP_DIVIDE:
|
|
|
|
if (!RightValue)
|
|
{
|
|
DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
|
|
Gbl_CurrentField, NULL);
|
|
return (0);
|
|
}
|
|
Result = LeftValue / RightValue;
|
|
break;
|
|
|
|
case EXPOP_MODULO:
|
|
|
|
if (!RightValue)
|
|
{
|
|
DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
|
|
Gbl_CurrentField, NULL);
|
|
return (0);
|
|
}
|
|
Result = LeftValue % RightValue;
|
|
break;
|
|
|
|
case EXPOP_ADD:
|
|
Result = LeftValue + RightValue;
|
|
break;
|
|
|
|
case EXPOP_SUBTRACT:
|
|
|
|
Result = LeftValue - RightValue;
|
|
break;
|
|
|
|
case EXPOP_SHIFT_RIGHT:
|
|
|
|
Result = LeftValue >> RightValue;
|
|
break;
|
|
|
|
case EXPOP_SHIFT_LEFT:
|
|
|
|
Result = LeftValue << RightValue;
|
|
break;
|
|
|
|
case EXPOP_LESS:
|
|
|
|
Result = LeftValue < RightValue;
|
|
break;
|
|
|
|
case EXPOP_GREATER:
|
|
|
|
Result = LeftValue > RightValue;
|
|
break;
|
|
|
|
case EXPOP_LESS_EQUAL:
|
|
|
|
Result = LeftValue <= RightValue;
|
|
break;
|
|
|
|
case EXPOP_GREATER_EQUAL:
|
|
|
|
Result = LeftValue >= RightValue;
|
|
break;
|
|
|
|
case EXPOP_EQUAL:
|
|
|
|
Result = LeftValue == RightValue;
|
|
break;
|
|
|
|
case EXPOP_NOT_EQUAL:
|
|
|
|
Result = LeftValue != RightValue;
|
|
break;
|
|
|
|
case EXPOP_AND:
|
|
|
|
Result = LeftValue & RightValue;
|
|
break;
|
|
|
|
case EXPOP_XOR:
|
|
|
|
Result = LeftValue ^ RightValue;
|
|
break;
|
|
|
|
case EXPOP_OR:
|
|
|
|
Result = LeftValue | RightValue;
|
|
break;
|
|
|
|
case EXPOP_LOGICAL_AND:
|
|
|
|
Result = LeftValue && RightValue;
|
|
break;
|
|
|
|
case EXPOP_LOGICAL_OR:
|
|
|
|
Result = LeftValue || RightValue;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Unknown operator */
|
|
|
|
DtFatal (ASL_MSG_INVALID_EXPRESSION,
|
|
Gbl_CurrentField, NULL);
|
|
return (0);
|
|
}
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT,
|
|
"IntegerEval: (%8.8X%8.8X %s %8.8X%8.8X) = %8.8X%8.8X\n",
|
|
ACPI_FORMAT_UINT64 (LeftValue),
|
|
DtGetOpName (Operator),
|
|
ACPI_FORMAT_UINT64 (RightValue),
|
|
ACPI_FORMAT_UINT64 (Result));
|
|
|
|
return (Result);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtResolveLabel
|
|
*
|
|
* PARAMETERS: LabelString - Contains the label
|
|
*
|
|
* RETURN: Table offset associated with the label
|
|
*
|
|
* DESCRIPTION: Lookup a lable and return its value.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
UINT64
|
|
DtResolveLabel (
|
|
char *LabelString)
|
|
{
|
|
DT_FIELD *LabelField;
|
|
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, "Resolve Label: %s\n", LabelString);
|
|
|
|
/* Resolve a label reference to an integer (table offset) */
|
|
|
|
if (*LabelString != '$')
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
LabelField = DtLookupLabel (LabelString);
|
|
if (!LabelField)
|
|
{
|
|
DtError (ASL_ERROR, ASL_MSG_UNKNOWN_LABEL,
|
|
Gbl_CurrentField, LabelString);
|
|
return (0);
|
|
}
|
|
|
|
/* All we need from the label is the offset in the table */
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT, "Resolved Label: 0x%8.8X\n",
|
|
LabelField->TableOffset);
|
|
|
|
return (LabelField->TableOffset);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtDetectAllLabels
|
|
*
|
|
* PARAMETERS: FieldList - Field object at start of generic list
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Detect all labels in a list of "generic" opcodes (such as
|
|
* a UEFI table.) and insert them into the global label list.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
void
|
|
DtDetectAllLabels (
|
|
DT_FIELD *FieldList)
|
|
{
|
|
ACPI_DMTABLE_INFO *Info;
|
|
DT_FIELD *GenericField;
|
|
UINT32 TableOffset;
|
|
|
|
|
|
TableOffset = Gbl_CurrentTableOffset;
|
|
GenericField = FieldList;
|
|
|
|
/*
|
|
* Process all "Label:" fields within the parse tree. We need
|
|
* to know the offsets for all labels before we can compile
|
|
* the parse tree in order to handle forward references. Traverse
|
|
* tree and get/set all field lengths of all operators in order to
|
|
* determine the label offsets.
|
|
*/
|
|
while (GenericField)
|
|
{
|
|
Info = DtGetGenericTableInfo (GenericField->Name);
|
|
if (Info)
|
|
{
|
|
/* Maintain table offsets */
|
|
|
|
GenericField->TableOffset = TableOffset;
|
|
TableOffset += DtGetFieldLength (GenericField, Info);
|
|
|
|
/* Insert all labels in the global label list */
|
|
|
|
if (Info->Opcode == ACPI_DMT_LABEL)
|
|
{
|
|
DtInsertLabelField (GenericField);
|
|
}
|
|
}
|
|
|
|
GenericField = GenericField->Next;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtInsertLabelField
|
|
*
|
|
* PARAMETERS: Field - Field object with Label to be inserted
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Insert a label field into the global label list
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static void
|
|
DtInsertLabelField (
|
|
DT_FIELD *Field)
|
|
{
|
|
|
|
DbgPrint (ASL_DEBUG_OUTPUT,
|
|
"DtInsertLabelField: Found Label : %s at output table offset %X\n",
|
|
Field->Value, Field->TableOffset);
|
|
|
|
Field->NextLabel = Gbl_LabelList;
|
|
Gbl_LabelList = Field;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: DtLookupLabel
|
|
*
|
|
* PARAMETERS: Name - Label to be resolved
|
|
*
|
|
* RETURN: Field object associated with the label
|
|
*
|
|
* DESCRIPTION: Lookup a label in the global label list. Used during the
|
|
* resolution of integer expressions.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
static DT_FIELD *
|
|
DtLookupLabel (
|
|
char *Name)
|
|
{
|
|
DT_FIELD *LabelField;
|
|
|
|
|
|
/* Skip a leading $ */
|
|
|
|
if (*Name == '$')
|
|
{
|
|
Name++;
|
|
}
|
|
|
|
/* Search global list */
|
|
|
|
LabelField = Gbl_LabelList;
|
|
while (LabelField)
|
|
{
|
|
if (!strcmp (Name, LabelField->Value))
|
|
{
|
|
return (LabelField);
|
|
}
|
|
LabelField = LabelField->NextLabel;
|
|
}
|
|
|
|
return (NULL);
|
|
}
|