1 /******************************************************************************
3 * Module Name: dtexpress.c - Support for integer expressions and labels
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
12 * All rights reserved.
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
37 * The above copyright and patent license is granted only if the following
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
72 * 3.4. Intel retains all right, title, and interest in and to the Original
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
80 * 4. Disclaimer and Export Compliance
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
114 *****************************************************************************/
116 #define __DTEXPRESS_C__
118 #include "aslcompiler.h"
119 #include "dtcompiler.h"
120 #include "dtparser.y.h"
122 #define _COMPONENT DT_COMPILER
123 ACPI_MODULE_NAME ("dtexpress")
126 /* Local prototypes */
136 /* Global used for errors during parse and related functions */
138 DT_FIELD *Gbl_CurrentField;
141 /******************************************************************************
143 * FUNCTION: DtResolveIntegerExpression
145 * PARAMETERS: Field - Field object with Integer expression
146 * ReturnValue - Where the integer is returned
148 * RETURN: Status, and the resolved 64-bit integer value
150 * DESCRIPTION: Resolve an integer expression to a single value. Supports
151 * both integer constants and labels.
153 *****************************************************************************/
156 DtResolveIntegerExpression (
163 DbgPrint (ASL_DEBUG_OUTPUT, "Full Integer expression: %s\n",
166 Gbl_CurrentField = Field;
168 Result = DtEvaluateExpression (Field->Value);
169 *ReturnValue = Result;
174 /******************************************************************************
176 * FUNCTION: DtDoOperator
178 * PARAMETERS: LeftValue - First 64-bit operand
179 * Operator - Parse token for the operator (EXPOP_*)
180 * RightValue - Second 64-bit operand
182 * RETURN: 64-bit result of the requested operation
184 * DESCRIPTION: Perform the various 64-bit integer math functions
186 *****************************************************************************/
197 /* Perform the requested operation */
201 case EXPOP_ONES_COMPLIMENT:
202 Result = ~RightValue;
205 case EXPOP_LOGICAL_NOT:
206 Result = !RightValue;
210 Result = LeftValue * RightValue;
216 DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
217 Gbl_CurrentField, Gbl_CurrentField->Value);
220 Result = LeftValue / RightValue;
226 DtError (ASL_ERROR, ASL_MSG_DIVIDE_BY_ZERO,
227 Gbl_CurrentField, Gbl_CurrentField->Value);
230 Result = LeftValue % RightValue;
234 Result = LeftValue + RightValue;
238 Result = LeftValue - RightValue;
241 case EXPOP_SHIFT_RIGHT:
242 Result = LeftValue >> RightValue;
245 case EXPOP_SHIFT_LEFT:
246 Result = LeftValue << RightValue;
250 Result = LeftValue < RightValue;
254 Result = LeftValue > RightValue;
257 case EXPOP_LESS_EQUAL:
258 Result = LeftValue <= RightValue;
261 case EXPOP_GREATER_EQUAL:
262 Result = LeftValue >= RightValue;
266 Result = LeftValue = RightValue;
269 case EXPOP_NOT_EQUAL:
270 Result = LeftValue != RightValue;
274 Result = LeftValue & RightValue;
278 Result = LeftValue ^ RightValue;
282 Result = LeftValue | RightValue;
285 case EXPOP_LOGICAL_AND:
286 Result = LeftValue && RightValue;
289 case EXPOP_LOGICAL_OR:
290 Result = LeftValue || RightValue;
295 /* Unknown operator */
297 DtFatal (ASL_MSG_INVALID_EXPRESSION,
298 Gbl_CurrentField, Gbl_CurrentField->Value);
302 DbgPrint (ASL_DEBUG_OUTPUT,
303 "IntegerEval: %s (%8.8X%8.8X %s %8.8X%8.8X) = %8.8X%8.8X\n",
304 Gbl_CurrentField->Value,
305 ACPI_FORMAT_UINT64 (LeftValue),
306 DtGetOpName (Operator),
307 ACPI_FORMAT_UINT64 (RightValue),
308 ACPI_FORMAT_UINT64 (Result));
314 /******************************************************************************
316 * FUNCTION: DtResolveLabel
318 * PARAMETERS: LabelString - Contains the label
320 * RETURN: Table offset associated with the label
322 * DESCRIPTION: Lookup a lable and return its value.
324 *****************************************************************************/
330 DT_FIELD *LabelField;
333 DbgPrint (ASL_DEBUG_OUTPUT, "Resolve Label: %s\n", LabelString);
335 /* Resolve a label reference to an integer (table offset) */
337 if (*LabelString != '$')
342 LabelField = DtLookupLabel (LabelString);
345 DtError (ASL_ERROR, ASL_MSG_UNKNOWN_LABEL,
346 Gbl_CurrentField, LabelString);
350 /* All we need from the label is the offset in the table */
352 DbgPrint (ASL_DEBUG_OUTPUT, "Resolved Label: 0x%8.8X\n",
353 LabelField->TableOffset);
355 return (LabelField->TableOffset);
359 /******************************************************************************
361 * FUNCTION: DtDetectAllLabels
363 * PARAMETERS: FieldList - Field object at start of generic list
367 * DESCRIPTION: Detect all labels in a list of "generic" opcodes (such as
368 * a UEFI table.) and insert them into the global label list.
370 *****************************************************************************/
376 ACPI_DMTABLE_INFO *Info;
377 DT_FIELD *GenericField;
381 TableOffset = Gbl_CurrentTableOffset;
382 GenericField = FieldList;
385 * Process all "Label:" fields within the parse tree. We need
386 * to know the offsets for all labels before we can compile
387 * the parse tree in order to handle forward references. Traverse
388 * tree and get/set all field lengths of all operators in order to
389 * determine the label offsets.
393 Info = DtGetGenericTableInfo (GenericField->Name);
396 /* Maintain table offsets */
398 GenericField->TableOffset = TableOffset;
399 TableOffset += DtGetFieldLength (GenericField, Info);
401 /* Insert all labels in the global label list */
403 if (Info->Opcode == ACPI_DMT_LABEL)
405 DtInsertLabelField (GenericField);
409 GenericField = GenericField->Next;
414 /******************************************************************************
416 * FUNCTION: DtInsertLabelField
418 * PARAMETERS: Field - Field object with Label to be inserted
422 * DESCRIPTION: Insert a label field into the global label list
424 *****************************************************************************/
431 DbgPrint (ASL_DEBUG_OUTPUT,
432 "DtInsertLabelField: Found Label : %s at output table offset %X\n",
433 Field->Value, Field->TableOffset);
435 Field->NextLabel = Gbl_LabelList;
436 Gbl_LabelList = Field;
440 /******************************************************************************
442 * FUNCTION: DtLookupLabel
444 * PARAMETERS: Name - Label to be resolved
446 * RETURN: Field object associated with the label
448 * DESCRIPTION: Lookup a label in the global label list. Used during the
449 * resolution of integer expressions.
451 *****************************************************************************/
457 DT_FIELD *LabelField;
460 /* Skip a leading $ */
467 /* Search global list */
469 LabelField = Gbl_LabelList;
472 if (!ACPI_STRCMP (Name, LabelField->Value))
476 LabelField = LabelField->NextLabel;