1%{
2/******************************************************************************
3 *
4 * Module Name: prparser.y - Bison input file for preprocessor parser
5 *
6 *****************************************************************************/
7
8/******************************************************************************
9 *
10 * 1. Copyright Notice
11 *
12 * Some or all of this work - Copyright (c) 1999 - 2016, Intel Corp.
13 * All rights reserved.
14 *
15 * 2. License
16 *
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
20 * property rights.
21 *
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
28 *
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
37 *
38 * The above copyright and patent license is granted only if the following
39 * conditions are met:
40 *
41 * 3. Conditions
42 *
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
54 *
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
65 * make.
66 *
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3.4. Intel retains all right, title, and interest in and to the Original
74 * Intel Code.
75 *
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
80 *
81 * 4. Disclaimer and Export Compliance
82 *
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89 * PARTICULAR PURPOSE.
90 *
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98 * LIMITED REMEDY.
99 *
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
114 *
115 *****************************************************************************/
116
117#include "aslcompiler.h"
118#include "dtcompiler.h"
119
120#define _COMPONENT          ASL_PREPROCESSOR
121        ACPI_MODULE_NAME    ("prparser")
122
123void *                      AslLocalAllocate (unsigned int Size);
124
125/* Bison/yacc configuration */
126
127#undef alloca
128#define alloca              AslLocalAllocate
129
130int                         PrParserlex (void);
131int                         PrParserparse (void);
132void                        PrParsererror (char const *msg);
133extern char                 *PrParsertext;
134
135UINT64                      PrParserResult; /* Expression return value */
136
137/* Bison/yacc configuration */
138
139#define yytname             PrParsername
140#define YYDEBUG             1               /* Enable debug output */
141#define YYERROR_VERBOSE     1               /* Verbose error messages */
142#define YYFLAG              -32768
143
144/* Define YYMALLOC/YYFREE to prevent redefinition errors  */
145
146#define YYMALLOC            malloc
147#define YYFREE              free
148%}
149
150%union
151{
152     UINT64                 value;
153     UINT32                 op;
154     char                   *str;
155}
156
157/*! [Begin] no source code translation */
158
159%type  <value>  Expression
160
161%token <op>     EXPOP_EOF
162%token <op>     EXPOP_NEW_LINE
163%token <op>     EXPOP_NUMBER
164%token <op>     EXPOP_HEX_NUMBER
165%token <op>     EXPOP_RESERVED1
166%token <op>     EXPOP_RESERVED2
167%token <op>     EXPOP_PAREN_OPEN
168%token <op>     EXPOP_PAREN_CLOSE
169
170%left <op>      EXPOP_LOGICAL_OR
171%left <op>      EXPOP_LOGICAL_AND
172%left <op>      EXPOP_OR
173%left <op>      EXPOP_XOR
174%left <op>      EXPOP_AND
175%left <op>      EXPOP_EQUAL EXPOP_NOT_EQUAL
176%left <op>      EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
177%left <op>      EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
178%left <op>      EXPOP_ADD EXPOP_SUBTRACT
179%left <op>      EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
180%right <op>     EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
181
182/* Tokens above must be kept in synch with dtparser.y */
183
184%token <op>     EXPOP_DEFINE
185%token <op>     EXPOP_IDENTIFIER
186
187%%
188
189/*
190 *  Operator precedence rules (from K&R)
191 *
192 *  1)      ( )
193 *  2)      ! ~ (unary operators that are supported here)
194 *  3)      *   /   %
195 *  4)      +   -
196 *  5)      >>  <<
197 *  6)      <   >   <=  >=
198 *  7)      ==  !=
199 *  8)      &
200 *  9)      ^
201 *  10)     |
202 *  11)     &&
203 *  12)     ||
204 */
205
206/*! [End] no source code translation !*/
207
208Value
209    : Expression EXPOP_NEW_LINE                     { PrParserResult=$1; return 0; } /* End of line (newline) */
210    | Expression EXPOP_EOF                          { PrParserResult=$1; return 0; } /* End of string (0) */
211    ;
212
213Expression
214
215      /* Unary operators */
216
217    : EXPOP_LOGICAL_NOT         Expression          { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT,     $2);}
218    | EXPOP_ONES_COMPLIMENT     Expression          { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
219
220      /* Binary operators */
221
222    | Expression EXPOP_MULTIPLY         Expression  { $$ = DtDoOperator ($1, EXPOP_MULTIPLY,        $3);}
223    | Expression EXPOP_DIVIDE           Expression  { $$ = DtDoOperator ($1, EXPOP_DIVIDE,          $3);}
224    | Expression EXPOP_MODULO           Expression  { $$ = DtDoOperator ($1, EXPOP_MODULO,          $3);}
225    | Expression EXPOP_ADD              Expression  { $$ = DtDoOperator ($1, EXPOP_ADD,             $3);}
226    | Expression EXPOP_SUBTRACT         Expression  { $$ = DtDoOperator ($1, EXPOP_SUBTRACT,        $3);}
227    | Expression EXPOP_SHIFT_RIGHT      Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT,     $3);}
228    | Expression EXPOP_SHIFT_LEFT       Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT,      $3);}
229    | Expression EXPOP_GREATER          Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER,         $3);}
230    | Expression EXPOP_LESS             Expression  { $$ = DtDoOperator ($1, EXPOP_LESS,            $3);}
231    | Expression EXPOP_GREATER_EQUAL    Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL,   $3);}
232    | Expression EXPOP_LESS_EQUAL       Expression  { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL,      $3);}
233    | Expression EXPOP_EQUAL            Expression  { $$ = DtDoOperator ($1, EXPOP_EQUAL,           $3);}
234    | Expression EXPOP_NOT_EQUAL        Expression  { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL,       $3);}
235    | Expression EXPOP_AND              Expression  { $$ = DtDoOperator ($1, EXPOP_AND,             $3);}
236    | Expression EXPOP_XOR              Expression  { $$ = DtDoOperator ($1, EXPOP_XOR,             $3);}
237    | Expression EXPOP_OR               Expression  { $$ = DtDoOperator ($1, EXPOP_OR,              $3);}
238    | Expression EXPOP_LOGICAL_AND      Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND,     $3);}
239    | Expression EXPOP_LOGICAL_OR       Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR,      $3);}
240
241      /* Parentheses: '(' Expression ')' */
242
243    | EXPOP_PAREN_OPEN          Expression
244        EXPOP_PAREN_CLOSE                           { $$ = $2;}
245
246      /* #if defined (ID) or #if defined ID */
247
248    | EXPOP_DEFINE EXPOP_PAREN_OPEN EXPOP_IDENTIFIER
249        EXPOP_PAREN_CLOSE                           { $$ = PrIsDefined (PrParserlval.str);}
250
251    | EXPOP_DEFINE EXPOP_IDENTIFIER                 { $$ = PrIsDefined (PrParserlval.str);}
252
253    | EXPOP_IDENTIFIER                              { $$ = PrResolveDefine (PrParserlval.str);}
254
255      /* Default base for a non-prefixed integer is 10 */
256
257    | EXPOP_NUMBER                                  { AcpiUtStrtoul64 (PrParsertext, 10, ACPI_MAX64_BYTE_WIDTH, &$$);}
258
259      /* Standard hex number (0x1234) */
260
261    | EXPOP_HEX_NUMBER                              { AcpiUtStrtoul64 (PrParsertext, 16, ACPI_MAX64_BYTE_WIDTH, &$$);}
262    ;
263%%
264
265/*
266 * Local support functions, including parser entry point
267 */
268#define PR_FIRST_PARSE_OPCODE   EXPOP_EOF
269#define PR_YYTNAME_START        3
270
271
272/******************************************************************************
273 *
274 * FUNCTION:    PrParsererror
275 *
276 * PARAMETERS:  Message             - Parser-generated error message
277 *
278 * RETURN:      None
279 *
280 * DESCRIPTION: Handler for parser errors
281 *
282 *****************************************************************************/
283
284void
285PrParsererror (
286    char const              *Message)
287{
288
289    sprintf (StringBuffer, "Preprocessor Parser : %s (near line %u)",
290        Message, Gbl_CurrentLineNumber);
291    DtError (ASL_ERROR, ASL_MSG_SYNTAX,
292        NULL, (char *) StringBuffer);
293}
294
295
296/******************************************************************************
297 *
298 * FUNCTION:    PrGetOpName
299 *
300 * PARAMETERS:  ParseOpcode         - Parser token (EXPOP_*)
301 *
302 * RETURN:      Pointer to the opcode name
303 *
304 * DESCRIPTION: Get the ascii name of the parse opcode for debug output
305 *
306 *****************************************************************************/
307
308char *
309PrGetOpName (
310    UINT32                  ParseOpcode)
311{
312#ifdef ASL_YYTNAME_START
313    /*
314     * First entries (PR_YYTNAME_START) in yytname are special reserved names.
315     * Ignore first 6 characters of name (EXPOP_)
316     */
317    return ((char *) yytname
318        [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
319#else
320    return ("[Unknown parser generator]");
321#endif
322}
323
324
325/******************************************************************************
326 *
327 * FUNCTION:    PrEvaluateExpression
328 *
329 * PARAMETERS:  ExprString          - Expression to be evaluated. Must be
330 *                                    terminated by either a newline or a NUL
331 *                                    string terminator
332 *
333 * RETURN:      64-bit value for the expression
334 *
335 * DESCRIPTION: Main entry point for the DT expression parser
336 *
337 *****************************************************************************/
338
339UINT64
340PrEvaluateExpression (
341    char                    *ExprString)
342{
343
344    DbgPrint (ASL_DEBUG_OUTPUT,
345        "**** Input expression: %s\n", ExprString);
346
347    /* Point lexer to the input string */
348
349    if (PrInitLexer (ExprString))
350    {
351        DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
352            NULL, "Could not initialize lexer");
353        return (0);
354    }
355
356    /* Parse/Evaluate the input string (value returned in PrParserResult) */
357
358    PrParserparse ();
359    PrTerminateLexer ();
360
361    DbgPrint (ASL_DEBUG_OUTPUT,
362        "**** Parser returned value: %u (%8.8X%8.8X)\n",
363        (UINT32) PrParserResult, ACPI_FORMAT_UINT64 (PrParserResult));
364
365    return (PrParserResult);
366}
367