1 /******************************************************************************
3 * Module Name: aslanalyze.c - Support functions for parse tree walks
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 *****************************************************************************/
117 #include "aslcompiler.h"
118 #include "aslcompiler.y.h"
122 #define _COMPONENT ACPI_COMPILER
123 ACPI_MODULE_NAME ("aslanalyze")
126 /*******************************************************************************
128 * FUNCTION: AnIsInternalMethod
130 * PARAMETERS: Op - Current op
134 * DESCRIPTION: Check for an internal control method.
136 ******************************************************************************/
140 ACPI_PARSE_OBJECT *Op)
143 if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
144 (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
153 /*******************************************************************************
155 * FUNCTION: AnGetInternalMethodReturnType
157 * PARAMETERS: Op - Current op
161 * DESCRIPTION: Get the return type of an internal method
163 ******************************************************************************/
166 AnGetInternalMethodReturnType (
167 ACPI_PARSE_OBJECT *Op)
170 if ((!ACPI_STRCMP (Op->Asl.ExternalName, "\\_OSI")) ||
171 (!ACPI_STRCMP (Op->Asl.ExternalName, "_OSI")))
173 return (ACPI_BTYPE_STRING);
180 /*******************************************************************************
182 * FUNCTION: AnCheckId
184 * PARAMETERS: Op - Current parse op
189 * DESCRIPTION: Perform various checks on _HID and _CID strings. Only limited
190 * checks can be performed on _CID strings.
192 ******************************************************************************/
196 ACPI_PARSE_OBJECT *Op,
201 UINT32 AlphaPrefixLength;
204 /* Only care about string versions of _HID/_CID (integers are legal) */
206 if (Op->Asl.ParseOpcode != PARSEOP_STRING_LITERAL)
211 /* For both _HID and _CID, the string must be non-null */
213 Length = strlen (Op->Asl.Value.String);
216 AslError (ASL_ERROR, ASL_MSG_NULL_STRING,
222 * One of the things we want to catch here is the use of a leading
223 * asterisk in the string -- an odd construct that certain platform
224 * manufacturers are fond of. Technically, a leading asterisk is OK
225 * for _CID, but a valid use of this has not been seen.
227 if (*Op->Asl.Value.String == '*')
229 AslError (ASL_ERROR, ASL_MSG_LEADING_ASTERISK,
230 Op, Op->Asl.Value.String);
234 /* _CID strings are bus-specific, no more checks can be performed */
236 if (Type == ASL_TYPE_CID)
241 /* For _HID, all characters must be alphanumeric */
243 for (i = 0; Op->Asl.Value.String[i]; i++)
245 if (!isalnum ((int) Op->Asl.Value.String[i]))
247 AslError (ASL_ERROR, ASL_MSG_ALPHANUMERIC_STRING,
248 Op, Op->Asl.Value.String);
253 /* _HID String must be of the form "XXX####" or "ACPI####" */
255 if ((Length < 7) || (Length > 8))
257 AslError (ASL_ERROR, ASL_MSG_HID_LENGTH,
258 Op, Op->Asl.Value.String);
262 /* _HID Length is valid, now check for uppercase (first 3 or 4 chars) */
264 AlphaPrefixLength = 3;
267 AlphaPrefixLength = 4;
270 /* Ensure the alphabetic prefix is all uppercase */
272 for (i = 0; (i < AlphaPrefixLength) && Op->Asl.Value.String[i]; i++)
274 if (!isupper ((int) Op->Asl.Value.String[i]))
276 AslError (ASL_ERROR, ASL_MSG_UPPER_CASE,
277 Op, &Op->Asl.Value.String[i]);
284 /*******************************************************************************
286 * FUNCTION: AnLastStatementIsReturn
288 * PARAMETERS: Op - A method parse node
290 * RETURN: TRUE if last statement is an ASL RETURN. False otherwise
292 * DESCRIPTION: Walk down the list of top level statements within a method
293 * to find the last one. Check if that last statement is in
294 * fact a RETURN statement.
296 ******************************************************************************/
299 AnLastStatementIsReturn (
300 ACPI_PARSE_OBJECT *Op)
302 ACPI_PARSE_OBJECT *Next;
305 /* Check if last statement is a return */
307 Next = ASL_GET_CHILD_NODE (Op);
310 if ((!Next->Asl.Next) &&
311 (Next->Asl.ParseOpcode == PARSEOP_RETURN))
316 Next = ASL_GET_PEER_NODE (Next);
323 /*******************************************************************************
325 * FUNCTION: AnCheckMethodReturnValue
327 * PARAMETERS: Op - Parent
328 * OpInfo - Parent info
329 * ArgOp - Method invocation op
330 * RequiredBtypes - What caller requires
331 * ThisNodeBtype - What this node returns (if anything)
335 * DESCRIPTION: Check a method invocation for 1) A return value and if it does
336 * in fact return a value, 2) check the type of the return value.
338 ******************************************************************************/
341 AnCheckMethodReturnValue (
342 ACPI_PARSE_OBJECT *Op,
343 const ACPI_OPCODE_INFO *OpInfo,
344 ACPI_PARSE_OBJECT *ArgOp,
345 UINT32 RequiredBtypes,
346 UINT32 ThisNodeBtype)
348 ACPI_PARSE_OBJECT *OwningOp;
349 ACPI_NAMESPACE_NODE *Node;
352 Node = ArgOp->Asl.Node;
355 /* Examine the parent op of this method */
358 if (OwningOp->Asl.CompileFlags & NODE_METHOD_NO_RETVAL)
360 /* Method NEVER returns a value */
362 AslError (ASL_ERROR, ASL_MSG_NO_RETVAL, Op, Op->Asl.ExternalName);
364 else if (OwningOp->Asl.CompileFlags & NODE_METHOD_SOME_NO_RETVAL)
366 /* Method SOMETIMES returns a value, SOMETIMES not */
368 AslError (ASL_WARNING, ASL_MSG_SOME_NO_RETVAL, Op, Op->Asl.ExternalName);
370 else if (!(ThisNodeBtype & RequiredBtypes))
372 /* Method returns a value, but the type is wrong */
374 AnFormatBtype (StringBuffer, ThisNodeBtype);
375 AnFormatBtype (StringBuffer2, RequiredBtypes);
378 * The case where the method does not return any value at all
379 * was already handled in the namespace cross reference
380 * -- Only issue an error if the method in fact returns a value,
381 * but it is of the wrong type
383 if (ThisNodeBtype != 0)
386 "Method returns [%s], %s operator requires [%s]",
387 StringBuffer, OpInfo->Name, StringBuffer2);
389 AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer);
395 /*******************************************************************************
397 * FUNCTION: AnIsResultUsed
399 * PARAMETERS: Op - Parent op for the operator
401 * RETURN: TRUE if result from this operation is actually consumed
403 * DESCRIPTION: Determine if the function result value from an operator is
406 ******************************************************************************/
410 ACPI_PARSE_OBJECT *Op)
412 ACPI_PARSE_OBJECT *Parent;
415 switch (Op->Asl.ParseOpcode)
417 case PARSEOP_INCREMENT:
418 case PARSEOP_DECREMENT:
420 /* These are standalone operators, no return value */
428 /* Examine parent to determine if the return value is used */
430 Parent = Op->Asl.Parent;
431 switch (Parent->Asl.ParseOpcode)
433 /* If/While - check if the operator is the predicate */
438 /* First child is the predicate */
440 if (Parent->Asl.Child == Op)
446 /* Not used if one of these is the parent */
449 case PARSEOP_DEFINITIONBLOCK:
455 /* Any other type of parent means that the result is used */
462 /*******************************************************************************
464 * FUNCTION: ApCheckForGpeNameConflict
466 * PARAMETERS: Op - Current parse op
470 * DESCRIPTION: Check for a conflict between GPE names within this scope.
471 * Conflict means two GPE names with the same GPE number, but
472 * different types -- such as _L1C and _E1C.
474 ******************************************************************************/
477 ApCheckForGpeNameConflict (
478 ACPI_PARSE_OBJECT *Op)
480 ACPI_PARSE_OBJECT *NextOp;
482 char Name[ACPI_NAME_SIZE + 1];
483 char Target[ACPI_NAME_SIZE];
486 /* Need a null-terminated string version of NameSeg */
488 ACPI_MOVE_32_TO_32 (Name, &Op->Asl.NameSeg);
489 Name[ACPI_NAME_SIZE] = 0;
493 * 1st char must be underscore
494 * 2nd char must be L or E
495 * 3rd/4th chars must be a hex number
497 if ((Name[0] != '_') ||
498 ((Name[1] != 'L') && (Name[1] != 'E')))
503 /* Verify 3rd/4th chars are a valid hex value */
505 GpeNumber = ACPI_STRTOUL (&Name[2], NULL, 16);
506 if (GpeNumber == ACPI_UINT32_MAX)
512 * We are now sure we have an _Lxx or _Exx.
513 * Create the target name that would cause collision (Flip E/L)
515 ACPI_MOVE_32_TO_32 (Target, Name);
517 /* Inject opposite letter ("L" versus "E") */
523 else /* Name[1] == 'E' */
528 /* Search all peers (objects within this scope) for target match */
530 NextOp = Op->Asl.Next;
534 * We mostly care about methods, but check Name() constructs also,
535 * even though they will get another error for not being a method.
536 * All GPE names must be defined as control methods.
538 if ((NextOp->Asl.ParseOpcode == PARSEOP_METHOD) ||
539 (NextOp->Asl.ParseOpcode == PARSEOP_NAME))
541 if (ACPI_COMPARE_NAME (Target, NextOp->Asl.NameSeg))
543 /* Found both _Exy and _Lxy in the same scope, error */
545 AslError (ASL_ERROR, ASL_MSG_GPE_NAME_CONFLICT, NextOp,
551 NextOp = NextOp->Asl.Next;
554 /* OK, no conflict found */