1 /******************************************************************************
2 *
3 * Module Name: aslexternal - ASL External opcode compiler support
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2023, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
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
19 * property rights.
20 *
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
27 *
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;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
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.
53 *
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
64 * make.
65 *
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
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
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.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
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
88 * PARTICULAR PURPOSE.
89 *
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
97 * LIMITED REMEDY.
98 *
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.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
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.
133 *
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.
145 *
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.
149 *
150 *****************************************************************************/
151
152 #include "aslcompiler.h"
153 #include "aslcompiler.y.h"
154 #include "acparser.h"
155 #include "amlcode.h"
156 #include "acnamesp.h"
157
158
159 #define _COMPONENT ACPI_COMPILER
160 ACPI_MODULE_NAME ("aslexternal")
161
162
163 /* Local prototypes */
164
165 static void
166 ExInsertArgCount (
167 ACPI_PARSE_OBJECT *Op);
168
169 static void
170 ExMoveExternals (
171 ACPI_PARSE_OBJECT *DefinitionBlockOp);
172
173
174 /*******************************************************************************
175 *
176 * FUNCTION: ExDoExternal
177 *
178 * PARAMETERS: Op - Current Parse node
179 *
180 * RETURN: None
181 *
182 * DESCRIPTION: Add an External() definition to the global list. This list
183 * is used to generate External opcodes.
184 *
185 ******************************************************************************/
186
187 void
ExDoExternal(ACPI_PARSE_OBJECT * Op)188 ExDoExternal (
189 ACPI_PARSE_OBJECT *Op)
190 {
191 ACPI_PARSE_OBJECT *ListOp;
192 ACPI_PARSE_OBJECT *Prev;
193 ACPI_PARSE_OBJECT *Next;
194 ACPI_PARSE_OBJECT *ArgCountOp;
195 ACPI_PARSE_OBJECT *TypeOp;
196 ACPI_PARSE_OBJECT *ExternTypeOp = Op->Asl.Child->Asl.Next;
197 UINT32 ExternType;
198 UINT8 ParamCount = ASL_EXTERNAL_METHOD_UNKNOWN_PARAMS;
199 UINT32 ParamTypes[ACPI_METHOD_NUM_ARGS];
200
201
202 ExternType = AnMapObjTypeToBtype (ExternTypeOp);
203 if (ExternType != ACPI_BTYPE_METHOD)
204 {
205 /*
206 * If this is not a method, it has zero parameters this local variable
207 * is used only for methods
208 */
209 ParamCount = 0;
210 }
211
212 /*
213 * The parser allows optional parameter return types regardless of the
214 * type. Check object type keyword emit error if optional parameter/return
215 * types exist.
216 *
217 * Check the parameter return type
218 */
219 TypeOp = ExternTypeOp->Asl.Next;
220 if (TypeOp->Asl.Child)
221 {
222 /* Ignore the return type for now. */
223
224 (void) MtProcessTypeOp (TypeOp->Asl.Child);
225 if (ExternType != ACPI_BTYPE_METHOD)
226 {
227 sprintf (AslGbl_MsgBuffer, "Found type [%s]", AcpiUtGetTypeName(ExternType));
228 AslError (ASL_ERROR, ASL_MSG_EXTERN_INVALID_RET_TYPE, TypeOp,
229 AslGbl_MsgBuffer);
230 }
231 }
232
233 /* Check the parameter types */
234
235 TypeOp = TypeOp->Asl.Next;
236 if (TypeOp->Asl.Child)
237 {
238 ParamCount = MtProcessParameterTypeList (TypeOp->Asl.Child, ParamTypes);
239 if (ExternType != ACPI_BTYPE_METHOD)
240 {
241 sprintf (AslGbl_MsgBuffer, "Found type [%s]", AcpiUtGetTypeName(ExternType));
242 AslError (ASL_ERROR, ASL_MSG_EXTERN_INVALID_PARAM_TYPE, TypeOp,
243 AslGbl_MsgBuffer);
244 }
245 }
246
247 ArgCountOp = Op->Asl.Child->Asl.Next->Asl.Next;
248 ArgCountOp->Asl.AmlOpcode = AML_RAW_DATA_BYTE;
249 ArgCountOp->Asl.ParseOpcode = PARSEOP_BYTECONST;
250 ArgCountOp->Asl.Value.Integer = ParamCount;
251 UtSetParseOpName (ArgCountOp);
252
253 /* Create new list node of arbitrary type */
254
255 ListOp = TrAllocateOp (PARSEOP_DEFAULT_ARG);
256
257 /* Store External node as child */
258
259 ListOp->Asl.Child = Op;
260 ListOp->Asl.Next = NULL;
261
262 if (AslGbl_ExternalsListHead)
263 {
264 /* Link new External to end of list */
265
266 Prev = AslGbl_ExternalsListHead;
267 Next = Prev;
268 while (Next)
269 {
270 Prev = Next;
271 Next = Next->Asl.Next;
272 }
273
274 Prev->Asl.Next = ListOp;
275 }
276 else
277 {
278 AslGbl_ExternalsListHead = ListOp;
279 }
280 }
281
282
283 /*******************************************************************************
284 *
285 * FUNCTION: ExInsertArgCount
286 *
287 * PARAMETERS: Op - Op for a method invocation
288 *
289 * RETURN: None
290 *
291 * DESCRIPTION: Obtain the number of arguments for a control method -- from
292 * the actual invocation.
293 *
294 ******************************************************************************/
295
296 static void
ExInsertArgCount(ACPI_PARSE_OBJECT * Op)297 ExInsertArgCount (
298 ACPI_PARSE_OBJECT *Op)
299 {
300 ACPI_PARSE_OBJECT *Next;
301 ACPI_PARSE_OBJECT *NameOp;
302 ACPI_PARSE_OBJECT *Child;
303 ACPI_PARSE_OBJECT *ArgCountOp;
304 char * ExternalName;
305 char * CallName;
306 UINT16 ArgCount = 0;
307 ACPI_STATUS Status;
308
309
310 CallName = AcpiNsGetNormalizedPathname (Op->Asl.Node, TRUE);
311
312 Next = AslGbl_ExternalsListHead;
313 while (Next)
314 {
315 ArgCount = 0;
316
317 /* Skip if External node already handled */
318
319 if (Next->Asl.Child->Asl.CompileFlags & OP_VISITED)
320 {
321 Next = Next->Asl.Next;
322 continue;
323 }
324
325 NameOp = Next->Asl.Child->Asl.Child;
326 ExternalName = AcpiNsGetNormalizedPathname (NameOp->Asl.Node, TRUE);
327
328 if (strcmp (CallName, ExternalName))
329 {
330 ACPI_FREE (ExternalName);
331 Next = Next->Asl.Next;
332 continue;
333 }
334
335 Next->Asl.Child->Asl.CompileFlags |= OP_VISITED;
336
337 /*
338 * Since we will reposition Externals to the Root, set Namepath
339 * to the fully qualified name and recalculate the aml length
340 */
341 Status = UtInternalizeName (ExternalName,
342 &NameOp->Asl.Value.String);
343
344 ACPI_FREE (ExternalName);
345 if (ACPI_FAILURE (Status))
346 {
347 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
348 NULL, "- Could not Internalize External");
349 break;
350 }
351
352 NameOp->Asl.AmlLength = strlen (NameOp->Asl.Value.String);
353
354 /* Get argument count */
355
356 Child = Op->Asl.Child;
357 while (Child)
358 {
359 ArgCount++;
360 Child = Child->Asl.Next;
361 }
362
363 /* Setup ArgCount operand */
364
365 ArgCountOp = Next->Asl.Child->Asl.Child->Asl.Next->Asl.Next;
366 ArgCountOp->Asl.Value.Integer = ArgCount;
367 break;
368 }
369
370 ACPI_FREE (CallName);
371 }
372
373
374 /*******************************************************************************
375 *
376 * FUNCTION: ExAmlExternalWalkBegin
377 *
378 * PARAMETERS: ASL_WALK_CALLBACK
379 *
380 * RETURN: None
381 *
382 * DESCRIPTION: Parse tree walk to create external opcode list for methods.
383 *
384 ******************************************************************************/
385
386 ACPI_STATUS
ExAmlExternalWalkBegin(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)387 ExAmlExternalWalkBegin (
388 ACPI_PARSE_OBJECT *Op,
389 UINT32 Level,
390 void *Context)
391 {
392
393 /* External list head saved in the definition block op */
394
395 if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)
396 {
397 AslGbl_ExternalsListHead = Op->Asl.Value.Arg;
398 }
399
400 if (!AslGbl_ExternalsListHead)
401 {
402 return (AE_OK);
403 }
404
405 if (Op->Asl.ParseOpcode != PARSEOP_METHODCALL)
406 {
407 return (AE_OK);
408 }
409
410 /*
411 * The NameOp child under an ExternalOp gets turned into PARSE_METHODCALL
412 * by XfNamespaceLocateBegin(). Ignore these.
413 */
414 if (Op->Asl.Parent &&
415 Op->Asl.Parent->Asl.ParseOpcode == PARSEOP_EXTERNAL)
416 {
417 return (AE_OK);
418 }
419
420 ExInsertArgCount (Op);
421 return (AE_OK);
422 }
423
424
425 /*******************************************************************************
426 *
427 * FUNCTION: ExAmlExternalWalkEnd
428 *
429 * PARAMETERS: ASL_WALK_CALLBACK
430 *
431 * RETURN: None
432 *
433 * DESCRIPTION: Parse tree walk to create external opcode list for methods.
434 * Here, we just want to catch the case where a definition block
435 * has been completed. Then we move all of the externals into
436 * a single block in the parse tree and thus the AML code.
437 *
438 ******************************************************************************/
439
440 ACPI_STATUS
ExAmlExternalWalkEnd(ACPI_PARSE_OBJECT * Op,UINT32 Level,void * Context)441 ExAmlExternalWalkEnd (
442 ACPI_PARSE_OBJECT *Op,
443 UINT32 Level,
444 void *Context)
445 {
446
447 if (Op->Asl.ParseOpcode == PARSEOP_DEFINITION_BLOCK)
448 {
449 /*
450 * Process any existing external list. (Support for
451 * multiple definition blocks in a single file/compile)
452 */
453 ExMoveExternals (Op);
454 AslGbl_ExternalsListHead = NULL;
455 }
456
457 return (AE_OK);
458 }
459
460
461 /*******************************************************************************
462 *
463 * FUNCTION: ExMoveExternals
464 *
465 * PARAMETERS: DefinitionBlockOp - Op for current definition block
466 *
467 * RETURN: None
468 *
469 * DESCRIPTION: Move all externals present in the source file into a single
470 * block of AML code, surrounded by an "If (0)" to prevent
471 * AML interpreters from attempting to execute the External
472 * opcodes.
473 *
474 ******************************************************************************/
475
476 static void
ExMoveExternals(ACPI_PARSE_OBJECT * DefinitionBlockOp)477 ExMoveExternals (
478 ACPI_PARSE_OBJECT *DefinitionBlockOp)
479 {
480 ACPI_PARSE_OBJECT *ParentOp;
481 ACPI_PARSE_OBJECT *ExternalOp;
482 ACPI_PARSE_OBJECT *PredicateOp;
483 ACPI_PARSE_OBJECT *NextOp;
484 ACPI_PARSE_OBJECT *Prev;
485 ACPI_PARSE_OBJECT *Next;
486 char *ExternalName;
487 ACPI_OBJECT_TYPE ObjType;
488 ACPI_STATUS Status;
489 UINT32 i;
490
491
492 if (!AslGbl_ExternalsListHead)
493 {
494 return;
495 }
496
497 /* Remove the External nodes from the tree */
498
499 NextOp = AslGbl_ExternalsListHead;
500 while (NextOp)
501 {
502 /*
503 * The External is stored in child pointer of each node in the
504 * list
505 */
506 ExternalOp = NextOp->Asl.Child;
507
508 /* Get/set the fully qualified name */
509
510 ExternalName = AcpiNsGetNormalizedPathname (ExternalOp->Asl.Node, TRUE);
511 ExternalOp->Asl.ExternalName = ExternalName;
512 ExternalOp->Asl.Namepath = ExternalName;
513
514 /* Set line numbers (for listings, etc.) */
515
516 ExternalOp->Asl.LineNumber = 0;
517 ExternalOp->Asl.LogicalLineNumber = 0;
518
519 Next = ExternalOp->Asl.Child;
520 Next->Asl.LineNumber = 0;
521 Next->Asl.LogicalLineNumber = 0;
522
523 if (Next->Asl.ParseOpcode == PARSEOP_NAMESEG)
524 {
525 Next->Asl.ParseOpcode = PARSEOP_NAMESTRING;
526 }
527
528 Next->Asl.ExternalName = ExternalName;
529 Status = UtInternalizeName (ExternalName, &Next->Asl.Value.String);
530 if (ACPI_FAILURE (Status))
531 {
532 AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
533 Next, "Could not internalize namestring");
534 return;
535 }
536
537 Next->Asl.AmlLength = strlen (Next->Asl.Value.String);
538
539 Next = Next->Asl.Next;
540 Next->Asl.LineNumber = 0;
541 Next->Asl.LogicalLineNumber = 0;
542
543 Next = Next->Asl.Next;
544 Next->Asl.LineNumber = 0;
545 Next->Asl.LogicalLineNumber = 0;
546
547 Next = Next->Asl.Next;
548 Next->Asl.LineNumber = 0;
549 Next->Asl.LogicalLineNumber = 0;
550
551 ParentOp = ExternalOp->Asl.Parent;
552 Prev = Next = ParentOp->Asl.Child;
553
554 /* Now find the External node's position in parse tree */
555
556 while (Next != ExternalOp)
557 {
558 Prev = Next;
559 Next = Next->Asl.Next;
560 }
561
562 /* Remove the External from the parse tree */
563
564 if (Prev == ExternalOp)
565 {
566 /* External was the first child node */
567
568 ParentOp->Asl.Child = ExternalOp->Asl.Next;
569 }
570
571 Prev->Asl.Next = ExternalOp->Asl.Next;
572 ExternalOp->Asl.Next = NULL;
573 ExternalOp->Asl.Parent = AslGbl_ExternalsListHead;
574
575 /* Point the External to the next in the list */
576
577 if (NextOp->Asl.Next)
578 {
579 ExternalOp->Asl.Next = NextOp->Asl.Next->Asl.Child;
580 }
581
582 NextOp = NextOp->Asl.Next;
583 }
584
585 /*
586 * Loop again to remove MethodObj Externals for which
587 * a MethodCall was not found (dead external reference)
588 */
589 Prev = AslGbl_ExternalsListHead->Asl.Child;
590 Next = Prev;
591 while (Next)
592 {
593 ObjType = (ACPI_OBJECT_TYPE)
594 Next->Asl.Child->Asl.Next->Asl.Value.Integer;
595
596 if (ObjType == ACPI_TYPE_METHOD &&
597 !(Next->Asl.CompileFlags & OP_VISITED))
598 {
599 if (Next == Prev)
600 {
601 AslGbl_ExternalsListHead->Asl.Child = Next->Asl.Next;
602 Next->Asl.Next = NULL;
603 Prev = AslGbl_ExternalsListHead->Asl.Child;
604 Next = Prev;
605 continue;
606 }
607 else
608 {
609 Prev->Asl.Next = Next->Asl.Next;
610 Next->Asl.Next = NULL;
611 Next = Prev->Asl.Next;
612 continue;
613 }
614 }
615
616 Prev = Next;
617 Next = Next->Asl.Next;
618 }
619
620 /* If list is now empty, don't bother to make If (0) block */
621
622 if (!AslGbl_ExternalsListHead->Asl.Child)
623 {
624 return;
625 }
626
627 /* Convert Gbl_ExternalsListHead parent to If(). */
628
629 AslGbl_ExternalsListHead->Asl.ParseOpcode = PARSEOP_IF;
630 AslGbl_ExternalsListHead->Asl.AmlOpcode = AML_IF_OP;
631 AslGbl_ExternalsListHead->Asl.CompileFlags = OP_AML_PACKAGE;
632 UtSetParseOpName (AslGbl_ExternalsListHead);
633
634 /* Create a Zero op for the If predicate */
635
636 PredicateOp = TrAllocateOp (PARSEOP_ZERO);
637 PredicateOp->Asl.AmlOpcode = AML_ZERO_OP;
638
639 PredicateOp->Asl.Parent = AslGbl_ExternalsListHead;
640 PredicateOp->Asl.Child = NULL;
641 PredicateOp->Asl.Next = AslGbl_ExternalsListHead->Asl.Child;
642 AslGbl_ExternalsListHead->Asl.Child = PredicateOp;
643
644 /* Set line numbers (for listings, etc.) */
645
646 AslGbl_ExternalsListHead->Asl.LineNumber = 0;
647 AslGbl_ExternalsListHead->Asl.LogicalLineNumber = 0;
648
649 PredicateOp->Asl.LineNumber = 0;
650 PredicateOp->Asl.LogicalLineNumber = 0;
651
652 /* Insert block back in the list */
653
654 Prev = DefinitionBlockOp->Asl.Child;
655 Next = Prev;
656
657 /* Find last default arg */
658
659 for (i = 0; i < 6; i++)
660 {
661 Prev = Next;
662 Next = Prev->Asl.Next;
663 }
664
665 if (Next)
666 {
667 /* Definition Block is not empty */
668
669 AslGbl_ExternalsListHead->Asl.Next = Next;
670 }
671 else
672 {
673 /* Definition Block is empty. */
674
675 AslGbl_ExternalsListHead->Asl.Next = NULL;
676 }
677
678 Prev->Asl.Next = AslGbl_ExternalsListHead;
679 AslGbl_ExternalsListHead->Asl.Parent = Prev->Asl.Parent;
680 }
681
