1 /******************************************************************************
3 * Module Name: dtexpress.c - Support for integer expressions and labels
5 *****************************************************************************/
7 /******************************************************************************
11 * Some or all of this work - Copyright (c) 1999 - 2018, 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 * Alternatively, you may choose to be licensed under the terms of the
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
150 *****************************************************************************/
152 #include "aslcompiler.h"
153 #include "dtparser.y.h"
155 #define _COMPONENT DT_COMPILER
156 ACPI_MODULE_NAME ("dtexpress")
159 /* Local prototypes */
169 /* Global used for errors during parse and related functions */
171 DT_FIELD
*AslGbl_CurrentField
;
174 /******************************************************************************
176 * FUNCTION: DtResolveIntegerExpression
178 * PARAMETERS: Field - Field object with Integer expression
179 * ReturnValue - Where the integer is returned
181 * RETURN: Status, and the resolved 64-bit integer value
183 * DESCRIPTION: Resolve an integer expression to a single value. Supports
184 * both integer constants and labels.
186 *****************************************************************************/
189 DtResolveIntegerExpression (
196 DbgPrint (ASL_DEBUG_OUTPUT
, "Full Integer expression: %s\n",
199 AslGbl_CurrentField
= Field
;
201 Result
= DtEvaluateExpression (Field
->Value
);
202 *ReturnValue
= Result
;
207 /******************************************************************************
209 * FUNCTION: DtDoOperator
211 * PARAMETERS: LeftValue - First 64-bit operand
212 * Operator - Parse token for the operator (OP_EXP_*)
213 * RightValue - Second 64-bit operand
215 * RETURN: 64-bit result of the requested operation
217 * DESCRIPTION: Perform the various 64-bit integer math functions
219 *****************************************************************************/
230 /* Perform the requested operation */
234 case OP_EXP_ONES_COMPLIMENT
:
236 Result
= ~RightValue
;
239 case OP_EXP_LOGICAL_NOT
:
241 Result
= !RightValue
;
244 case OP_EXP_MULTIPLY
:
246 Result
= LeftValue
* RightValue
;
253 DtError (ASL_ERROR
, ASL_MSG_DIVIDE_BY_ZERO
,
254 AslGbl_CurrentField
, NULL
);
258 Result
= LeftValue
/ RightValue
;
265 DtError (ASL_ERROR
, ASL_MSG_DIVIDE_BY_ZERO
,
266 AslGbl_CurrentField
, NULL
);
270 Result
= LeftValue
% RightValue
;
274 Result
= LeftValue
+ RightValue
;
277 case OP_EXP_SUBTRACT
:
279 Result
= LeftValue
- RightValue
;
282 case OP_EXP_SHIFT_RIGHT
:
284 Result
= LeftValue
>> RightValue
;
287 case OP_EXP_SHIFT_LEFT
:
289 Result
= LeftValue
<< RightValue
;
294 Result
= LeftValue
< RightValue
;
299 Result
= LeftValue
> RightValue
;
302 case OP_EXP_LESS_EQUAL
:
304 Result
= LeftValue
<= RightValue
;
307 case OP_EXP_GREATER_EQUAL
:
309 Result
= LeftValue
>= RightValue
;
314 Result
= LeftValue
== RightValue
;
317 case OP_EXP_NOT_EQUAL
:
319 Result
= LeftValue
!= RightValue
;
324 Result
= LeftValue
& RightValue
;
329 Result
= LeftValue
^ RightValue
;
334 Result
= LeftValue
| RightValue
;
337 case OP_EXP_LOGICAL_AND
:
339 Result
= LeftValue
&& RightValue
;
342 case OP_EXP_LOGICAL_OR
:
344 Result
= LeftValue
|| RightValue
;
349 /* Unknown operator */
351 DtFatal (ASL_MSG_INVALID_EXPRESSION
,
352 AslGbl_CurrentField
, NULL
);
356 DbgPrint (ASL_DEBUG_OUTPUT
,
357 "IntegerEval: (%8.8X%8.8X %s %8.8X%8.8X) = %8.8X%8.8X\n",
358 ACPI_FORMAT_UINT64 (LeftValue
),
359 DtGetOpName (Operator
),
360 ACPI_FORMAT_UINT64 (RightValue
),
361 ACPI_FORMAT_UINT64 (Result
));
367 /******************************************************************************
369 * FUNCTION: DtResolveLabel
371 * PARAMETERS: LabelString - Contains the label
373 * RETURN: Table offset associated with the label
375 * DESCRIPTION: Lookup a lable and return its value.
377 *****************************************************************************/
383 DT_FIELD
*LabelField
;
386 DbgPrint (ASL_DEBUG_OUTPUT
, "Resolve Label: %s\n", LabelString
);
388 /* Resolve a label reference to an integer (table offset) */
390 if (*LabelString
!= '$')
395 LabelField
= DtLookupLabel (LabelString
);
398 DtError (ASL_ERROR
, ASL_MSG_UNKNOWN_LABEL
,
399 AslGbl_CurrentField
, LabelString
);
403 /* All we need from the label is the offset in the table */
405 DbgPrint (ASL_DEBUG_OUTPUT
, "Resolved Label: 0x%8.8X\n",
406 LabelField
->TableOffset
);
408 return (LabelField
->TableOffset
);
412 /******************************************************************************
414 * FUNCTION: DtDetectAllLabels
416 * PARAMETERS: FieldList - Field object at start of generic list
420 * DESCRIPTION: Detect all labels in a list of "generic" opcodes (such as
421 * a UEFI table.) and insert them into the global label list.
423 *****************************************************************************/
429 ACPI_DMTABLE_INFO
*Info
;
430 DT_FIELD
*GenericField
;
434 TableOffset
= AslGbl_CurrentTableOffset
;
435 GenericField
= FieldList
;
438 * Process all "Label:" fields within the parse tree. We need
439 * to know the offsets for all labels before we can compile
440 * the parse tree in order to handle forward references. Traverse
441 * tree and get/set all field lengths of all operators in order to
442 * determine the label offsets.
446 Info
= DtGetGenericTableInfo (GenericField
->Name
);
449 /* Maintain table offsets */
451 GenericField
->TableOffset
= TableOffset
;
452 TableOffset
+= DtGetFieldLength (GenericField
, Info
);
454 /* Insert all labels in the global label list */
456 if (Info
->Opcode
== ACPI_DMT_LABEL
)
458 DtInsertLabelField (GenericField
);
462 GenericField
= GenericField
->Next
;
467 /******************************************************************************
469 * FUNCTION: DtInsertLabelField
471 * PARAMETERS: Field - Field object with Label to be inserted
475 * DESCRIPTION: Insert a label field into the global label list
477 *****************************************************************************/
484 DbgPrint (ASL_DEBUG_OUTPUT
,
485 "DtInsertLabelField: Found Label : %s at output table offset %X\n",
486 Field
->Value
, Field
->TableOffset
);
488 Field
->NextLabel
= AslGbl_LabelList
;
489 AslGbl_LabelList
= Field
;
493 /******************************************************************************
495 * FUNCTION: DtLookupLabel
497 * PARAMETERS: Name - Label to be resolved
499 * RETURN: Field object associated with the label
501 * DESCRIPTION: Lookup a label in the global label list. Used during the
502 * resolution of integer expressions.
504 *****************************************************************************/
510 DT_FIELD
*LabelField
;
513 /* Skip a leading $ */
520 /* Search global list */
522 LabelField
= AslGbl_LabelList
;
525 if (!strcmp (Name
, LabelField
->Value
))
530 LabelField
= LabelField
->NextLabel
;