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#define __DSUTILS_C__
118
119#include "acpi.h"
120#include "acparser.h"
121#include "amlcode.h"
122#include "acdispat.h"
123#include "acinterp.h"
124#include "acnamesp.h"
125#include "acdebug.h"
126
127#define _COMPONENT ACPI_DISPATCHER
128 ACPI_MODULE_NAME ("dsutils")
129
130
131#ifndef ACPI_NO_METHOD_EXECUTION
132
133/*******************************************************************************
134 *
135 * FUNCTION: AcpiDsIsResultUsed
136 *
137 * PARAMETERS: Op
138 * ResultObj
139 * WalkState
140 *
141 * RETURN: Status
142 *
143 * DESCRIPTION: Check if a result object will be used by the parent
144 *
145 ******************************************************************************/
146
147BOOLEAN
148AcpiDsIsResultUsed (
149 ACPI_PARSE_OBJECT *Op,
150 ACPI_WALK_STATE *WalkState)
151{
152 const ACPI_OPCODE_INFO *ParentInfo;
153
154
155 ACPI_FUNCTION_TRACE_PTR ("DsIsResultUsed", Op);
156
157
158 /* Must have both an Op and a Result Object */
159
160 if (!Op)
161 {
162 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
163 return_VALUE (TRUE);
164 }
165
166 /*
167 * If there is no parent, the result can't possibly be used!
168 * (An executing method typically has no parent, since each
169 * method is parsed separately) However, a method that is
170 * invoked from another method has a parent.
171 */
172 if (!Op->Common.Parent)
173 {
174 return_VALUE (FALSE);
175 }
176
177 /*
178 * Get info on the parent. The root Op is AML_SCOPE
179 */
180 ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
181 if (ParentInfo->Class == AML_CLASS_UNKNOWN)
182 {
183 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown parent opcode. Op=%p\n", Op));
184 return_VALUE (FALSE);
185 }
186
187 /*
188 * Decide what to do with the result based on the parent. If
189 * the parent opcode will not use the result, delete the object.
190 * Otherwise leave it as is, it will be deleted when it is used
191 * as an operand later.
192 */
193 switch (ParentInfo->Class)
194 {
195 case AML_CLASS_CONTROL:
196
197 switch (Op->Common.Parent->Common.AmlOpcode)
198 {
199 case AML_RETURN_OP:
200
201 /* Never delete the return value associated with a return opcode */
202
203 goto ResultUsed;
204
205 case AML_IF_OP:
206 case AML_WHILE_OP:
207
208 /*
209 * If we are executing the predicate AND this is the predicate op,
210 * we will use the return value
211 */
212 if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
213 (WalkState->ControlState->Control.PredicateOp == Op))
214 {
215 goto ResultUsed;
216 }
217 break;
218
219 default:
220 /* Ignore other control opcodes */
221 break;
222 }
223
224 /* The general control opcode returns no result */
225
226 goto ResultNotUsed;
227
228
229 case AML_CLASS_CREATE:
230
231 /*
232 * These opcodes allow TermArg(s) as operands and therefore
233 * the operands can be method calls. The result is used.
234 */
235 goto ResultUsed;
236
237
238 case AML_CLASS_NAMED_OBJECT:
239
240 if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) ||
241 (Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) ||
242 (Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
243 (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
244 (Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) ||
245 (Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP))
246 {
247 /*
248 * These opcodes allow TermArg(s) as operands and therefore
249 * the operands can be method calls. The result is used.
250 */
251 goto ResultUsed;
252 }
253
254 goto ResultNotUsed;
255
256
257 default:
258
259 /*
260 * In all other cases. the parent will actually use the return
261 * object, so keep it.
262 */
263 goto ResultUsed;
264 }
265
266
267ResultUsed:
268 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n",
269 AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
270 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
271
272 return_VALUE (TRUE);
273
274
275ResultNotUsed:
276 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n",
277 AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
278 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
279
280 return_VALUE (FALSE);
281}
282
283
284/*******************************************************************************
285 *
286 * FUNCTION: AcpiDsDeleteResultIfNotUsed
287 *
288 * PARAMETERS: Op
289 * ResultObj
290 * WalkState
291 *
292 * RETURN: Status
293 *
294 * DESCRIPTION: Used after interpretation of an opcode. If there is an internal
295 * result descriptor, check if the parent opcode will actually use
296 * this result. If not, delete the result now so that it will
297 * not become orphaned.
298 *
299 ******************************************************************************/
300
301void
302AcpiDsDeleteResultIfNotUsed (
303 ACPI_PARSE_OBJECT *Op,
304 ACPI_OPERAND_OBJECT *ResultObj,
305 ACPI_WALK_STATE *WalkState)
306{
307 ACPI_OPERAND_OBJECT *ObjDesc;
308 ACPI_STATUS Status;
309
310
311 ACPI_FUNCTION_TRACE_PTR ("DsDeleteResultIfNotUsed", ResultObj);
312
313
314 if (!Op)
315 {
316 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
317 return_VOID;
318 }
319
320 if (!ResultObj)
321 {
322 return_VOID;
323 }
324
325 if (!AcpiDsIsResultUsed (Op, WalkState))
326 {
327 /*
328 * Must pop the result stack (ObjDesc should be equal to ResultObj)
329 */
330 Status = AcpiDsResultPop (&ObjDesc, WalkState);
331 if (ACPI_SUCCESS (Status))
332 {
333 AcpiUtRemoveReference (ResultObj);
334 }
335 }
336
337 return_VOID;
338}
339
340
341/*******************************************************************************
342 *
343 * FUNCTION: AcpiDsResolveOperands
344 *
345 * PARAMETERS: WalkState - Current walk state with operands on stack
346 *
347 * RETURN: Status
348 *
349 * DESCRIPTION: Resolve all operands to their values. Used to prepare
350 * arguments to a control method invocation (a call from one
351 * method to another.)
352 *
353 ******************************************************************************/
354
355ACPI_STATUS
356AcpiDsResolveOperands (
357 ACPI_WALK_STATE *WalkState)
358{
359 UINT32 i;
360 ACPI_STATUS Status = AE_OK;
361
362
363 ACPI_FUNCTION_TRACE_PTR ("DsResolveOperands", WalkState);
364
365
366 /*
367 * Attempt to resolve each of the valid operands
| 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#define __DSUTILS_C__
118
119#include "acpi.h"
120#include "acparser.h"
121#include "amlcode.h"
122#include "acdispat.h"
123#include "acinterp.h"
124#include "acnamesp.h"
125#include "acdebug.h"
126
127#define _COMPONENT ACPI_DISPATCHER
128 ACPI_MODULE_NAME ("dsutils")
129
130
131#ifndef ACPI_NO_METHOD_EXECUTION
132
133/*******************************************************************************
134 *
135 * FUNCTION: AcpiDsIsResultUsed
136 *
137 * PARAMETERS: Op
138 * ResultObj
139 * WalkState
140 *
141 * RETURN: Status
142 *
143 * DESCRIPTION: Check if a result object will be used by the parent
144 *
145 ******************************************************************************/
146
147BOOLEAN
148AcpiDsIsResultUsed (
149 ACPI_PARSE_OBJECT *Op,
150 ACPI_WALK_STATE *WalkState)
151{
152 const ACPI_OPCODE_INFO *ParentInfo;
153
154
155 ACPI_FUNCTION_TRACE_PTR ("DsIsResultUsed", Op);
156
157
158 /* Must have both an Op and a Result Object */
159
160 if (!Op)
161 {
162 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
163 return_VALUE (TRUE);
164 }
165
166 /*
167 * If there is no parent, the result can't possibly be used!
168 * (An executing method typically has no parent, since each
169 * method is parsed separately) However, a method that is
170 * invoked from another method has a parent.
171 */
172 if (!Op->Common.Parent)
173 {
174 return_VALUE (FALSE);
175 }
176
177 /*
178 * Get info on the parent. The root Op is AML_SCOPE
179 */
180 ParentInfo = AcpiPsGetOpcodeInfo (Op->Common.Parent->Common.AmlOpcode);
181 if (ParentInfo->Class == AML_CLASS_UNKNOWN)
182 {
183 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown parent opcode. Op=%p\n", Op));
184 return_VALUE (FALSE);
185 }
186
187 /*
188 * Decide what to do with the result based on the parent. If
189 * the parent opcode will not use the result, delete the object.
190 * Otherwise leave it as is, it will be deleted when it is used
191 * as an operand later.
192 */
193 switch (ParentInfo->Class)
194 {
195 case AML_CLASS_CONTROL:
196
197 switch (Op->Common.Parent->Common.AmlOpcode)
198 {
199 case AML_RETURN_OP:
200
201 /* Never delete the return value associated with a return opcode */
202
203 goto ResultUsed;
204
205 case AML_IF_OP:
206 case AML_WHILE_OP:
207
208 /*
209 * If we are executing the predicate AND this is the predicate op,
210 * we will use the return value
211 */
212 if ((WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) &&
213 (WalkState->ControlState->Control.PredicateOp == Op))
214 {
215 goto ResultUsed;
216 }
217 break;
218
219 default:
220 /* Ignore other control opcodes */
221 break;
222 }
223
224 /* The general control opcode returns no result */
225
226 goto ResultNotUsed;
227
228
229 case AML_CLASS_CREATE:
230
231 /*
232 * These opcodes allow TermArg(s) as operands and therefore
233 * the operands can be method calls. The result is used.
234 */
235 goto ResultUsed;
236
237
238 case AML_CLASS_NAMED_OBJECT:
239
240 if ((Op->Common.Parent->Common.AmlOpcode == AML_REGION_OP) ||
241 (Op->Common.Parent->Common.AmlOpcode == AML_DATA_REGION_OP) ||
242 (Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
243 (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) ||
244 (Op->Common.Parent->Common.AmlOpcode == AML_BUFFER_OP) ||
245 (Op->Common.Parent->Common.AmlOpcode == AML_INT_EVAL_SUBTREE_OP))
246 {
247 /*
248 * These opcodes allow TermArg(s) as operands and therefore
249 * the operands can be method calls. The result is used.
250 */
251 goto ResultUsed;
252 }
253
254 goto ResultNotUsed;
255
256
257 default:
258
259 /*
260 * In all other cases. the parent will actually use the return
261 * object, so keep it.
262 */
263 goto ResultUsed;
264 }
265
266
267ResultUsed:
268 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] used by Parent [%s] Op=%p\n",
269 AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
270 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
271
272 return_VALUE (TRUE);
273
274
275ResultNotUsed:
276 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Result of [%s] not used by Parent [%s] Op=%p\n",
277 AcpiPsGetOpcodeName (Op->Common.AmlOpcode),
278 AcpiPsGetOpcodeName (Op->Common.Parent->Common.AmlOpcode), Op));
279
280 return_VALUE (FALSE);
281}
282
283
284/*******************************************************************************
285 *
286 * FUNCTION: AcpiDsDeleteResultIfNotUsed
287 *
288 * PARAMETERS: Op
289 * ResultObj
290 * WalkState
291 *
292 * RETURN: Status
293 *
294 * DESCRIPTION: Used after interpretation of an opcode. If there is an internal
295 * result descriptor, check if the parent opcode will actually use
296 * this result. If not, delete the result now so that it will
297 * not become orphaned.
298 *
299 ******************************************************************************/
300
301void
302AcpiDsDeleteResultIfNotUsed (
303 ACPI_PARSE_OBJECT *Op,
304 ACPI_OPERAND_OBJECT *ResultObj,
305 ACPI_WALK_STATE *WalkState)
306{
307 ACPI_OPERAND_OBJECT *ObjDesc;
308 ACPI_STATUS Status;
309
310
311 ACPI_FUNCTION_TRACE_PTR ("DsDeleteResultIfNotUsed", ResultObj);
312
313
314 if (!Op)
315 {
316 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Op\n"));
317 return_VOID;
318 }
319
320 if (!ResultObj)
321 {
322 return_VOID;
323 }
324
325 if (!AcpiDsIsResultUsed (Op, WalkState))
326 {
327 /*
328 * Must pop the result stack (ObjDesc should be equal to ResultObj)
329 */
330 Status = AcpiDsResultPop (&ObjDesc, WalkState);
331 if (ACPI_SUCCESS (Status))
332 {
333 AcpiUtRemoveReference (ResultObj);
334 }
335 }
336
337 return_VOID;
338}
339
340
341/*******************************************************************************
342 *
343 * FUNCTION: AcpiDsResolveOperands
344 *
345 * PARAMETERS: WalkState - Current walk state with operands on stack
346 *
347 * RETURN: Status
348 *
349 * DESCRIPTION: Resolve all operands to their values. Used to prepare
350 * arguments to a control method invocation (a call from one
351 * method to another.)
352 *
353 ******************************************************************************/
354
355ACPI_STATUS
356AcpiDsResolveOperands (
357 ACPI_WALK_STATE *WalkState)
358{
359 UINT32 i;
360 ACPI_STATUS Status = AE_OK;
361
362
363 ACPI_FUNCTION_TRACE_PTR ("DsResolveOperands", WalkState);
364
365
366 /*
367 * Attempt to resolve each of the valid operands
|
369 */
370 for (i = 0; i < WalkState->NumOperands; i++)
371 {
372 Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState);
373 if (ACPI_FAILURE (Status))
374 {
375 break;
376 }
377 }
378
379 return_ACPI_STATUS (Status);
380}
381
382
383/*******************************************************************************
384 *
385 * FUNCTION: AcpiDsClearOperands
386 *
387 * PARAMETERS: WalkState - Current walk state with operands on stack
388 *
389 * RETURN: None
390 *
391 * DESCRIPTION: Clear all operands on the current walk state operand stack.
392 *
393 ******************************************************************************/
394
395void
396AcpiDsClearOperands (
397 ACPI_WALK_STATE *WalkState)
398{
399 UINT32 i;
400
401
402 ACPI_FUNCTION_TRACE_PTR ("AcpiDsClearOperands", WalkState);
403
404
405 /*
406 * Remove a reference on each operand on the stack
407 */
408 for (i = 0; i < WalkState->NumOperands; i++)
409 {
410 /*
411 * Remove a reference to all operands, including both
412 * "Arguments" and "Targets".
413 */
414 AcpiUtRemoveReference (WalkState->Operands[i]);
415 WalkState->Operands[i] = NULL;
416 }
417
418 WalkState->NumOperands = 0;
419 return_VOID;
420}
421#endif
422
423
424/*******************************************************************************
425 *
426 * FUNCTION: AcpiDsCreateOperand
427 *
428 * PARAMETERS: WalkState
429 * Arg
430 *
431 * RETURN: Status
432 *
433 * DESCRIPTION: Translate a parse tree object that is an argument to an AML
434 * opcode to the equivalent interpreter object. This may include
435 * looking up a name or entering a new name into the internal
436 * namespace.
437 *
438 ******************************************************************************/
439
440ACPI_STATUS
441AcpiDsCreateOperand (
442 ACPI_WALK_STATE *WalkState,
443 ACPI_PARSE_OBJECT *Arg,
444 UINT32 ArgIndex)
445{
446 ACPI_STATUS Status = AE_OK;
447 char *NameString;
448 UINT32 NameLength;
449 ACPI_OPERAND_OBJECT *ObjDesc;
450 ACPI_PARSE_OBJECT *ParentOp;
451 UINT16 Opcode;
452 ACPI_INTERPRETER_MODE InterpreterMode;
453 const ACPI_OPCODE_INFO *OpInfo;
454
455
456 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperand", Arg);
457
458
459 /* A valid name must be looked up in the namespace */
460
461 if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
462 (Arg->Common.Value.String))
463 {
464 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg));
465
466 /* Get the entire name string from the AML stream */
467
468 Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer,
469 &NameString, &NameLength);
470
471 if (ACPI_FAILURE (Status))
472 {
473 return_ACPI_STATUS (Status);
474 }
475
476 /*
477 * All prefixes have been handled, and the name is
478 * in NameString
479 */
480
481
482 /*
483 * Special handling for BufferField declarations. This is a deferred
484 * opcode that unfortunately defines the field name as the last
485 * parameter instead of the first. We get here when we are performing
486 * the deferred execution, so the actual name of the field is already
487 * in the namespace. We don't want to attempt to look it up again
488 * because we may be executing in a different scope than where the
489 * actual opcode exists.
490 */
491 if ((WalkState->DeferredNode) &&
492 (WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) &&
493 (ArgIndex != 0))
494 {
495 ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, WalkState->DeferredNode);
496 Status = AE_OK;
497 }
498 else /* All other opcodes */
499 {
500 /*
501 * Differentiate between a namespace "create" operation
502 * versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
503 * IMODE_EXECUTE) in order to support the creation of
504 * namespace objects during the execution of control methods.
505 */
506 ParentOp = Arg->Common.Parent;
507 OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
508 if ((OpInfo->Flags & AML_NSNODE) &&
509 (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
510 (ParentOp->Common.AmlOpcode != AML_REGION_OP) &&
511 (ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
512 {
513 /* Enter name into namespace if not found */
514
515 InterpreterMode = ACPI_IMODE_LOAD_PASS2;
516 }
517 else
518 {
519 /* Return a failure if name not found */
520
521 InterpreterMode = ACPI_IMODE_EXECUTE;
522 }
523
524 Status = AcpiNsLookup (WalkState->ScopeInfo, NameString,
525 ACPI_TYPE_ANY, InterpreterMode,
526 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
527 WalkState,
528 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc));
529 /*
530 * The only case where we pass through (ignore) a NOT_FOUND
531 * error is for the CondRefOf opcode.
532 */
533 if (Status == AE_NOT_FOUND)
534 {
535 if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP)
536 {
537 /*
538 * For the Conditional Reference op, it's OK if
539 * the name is not found; We just need a way to
540 * indicate this to the interpreter, set the
541 * object to the root
542 */
543 ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, AcpiGbl_RootNode);
544 Status = AE_OK;
545 }
546 else
547 {
548 /*
549 * We just plain didn't find it -- which is a
550 * very serious error at this point
551 */
552 Status = AE_AML_NAME_NOT_FOUND;
553 }
554 }
555
556 if (ACPI_FAILURE (Status))
557 {
558 ACPI_REPORT_NSERROR (NameString, Status);
559 }
560 }
561
562 /* Free the namestring created above */
563
564 ACPI_MEM_FREE (NameString);
565
566 /* Check status from the lookup */
567
568 if (ACPI_FAILURE (Status))
569 {
570 return_ACPI_STATUS (Status);
571 }
572
573 /* Put the resulting object onto the current object stack */
574
575 Status = AcpiDsObjStackPush (ObjDesc, WalkState);
576 if (ACPI_FAILURE (Status))
577 {
578 return_ACPI_STATUS (Status);
579 }
580 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
581 }
582 else
583 {
584 /* Check for null name case */
585
586 if (Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
587 {
588 /*
589 * If the name is null, this means that this is an
590 * optional result parameter that was not specified
591 * in the original ASL. Create a Zero Constant for a
592 * placeholder. (Store to a constant is a Noop.)
593 */
594 Opcode = AML_ZERO_OP; /* Has no arguments! */
595
596 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", Arg));
597 }
598 else
599 {
600 Opcode = Arg->Common.AmlOpcode;
601 }
602
603 /* Get the object type of the argument */
604
605 OpInfo = AcpiPsGetOpcodeInfo (Opcode);
606 if (OpInfo->ObjectType == ACPI_TYPE_INVALID)
607 {
608 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
609 }
610
611 if (OpInfo->Flags & AML_HAS_RETVAL)
612 {
613 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
614 "Argument previously created, already stacked \n"));
615
616 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (
617 WalkState->Operands [WalkState->NumOperands - 1], WalkState));
618
619 /*
620 * Use value that was already previously returned
621 * by the evaluation of this argument
622 */
623 Status = AcpiDsResultPopFromBottom (&ObjDesc, WalkState);
624 if (ACPI_FAILURE (Status))
625 {
626 /*
627 * Only error is underflow, and this indicates
628 * a missing or null operand!
629 */
630 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Missing or null operand, %s\n",
631 AcpiFormatException (Status)));
632 return_ACPI_STATUS (Status);
633 }
634 }
635 else
636 {
637 /* Create an ACPI_INTERNAL_OBJECT for the argument */
638
639 ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType);
640 if (!ObjDesc)
641 {
642 return_ACPI_STATUS (AE_NO_MEMORY);
643 }
644
645 /* Initialize the new object */
646
647 Status = AcpiDsInitObjectFromOp (WalkState, Arg,
648 Opcode, &ObjDesc);
649 if (ACPI_FAILURE (Status))
650 {
651 AcpiUtDeleteObjectDesc (ObjDesc);
652 return_ACPI_STATUS (Status);
653 }
654 }
655
656 /* Put the operand object on the object stack */
657
658 Status = AcpiDsObjStackPush (ObjDesc, WalkState);
659 if (ACPI_FAILURE (Status))
660 {
661 return_ACPI_STATUS (Status);
662 }
663
664 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
665 }
666
667 return_ACPI_STATUS (AE_OK);
668}
669
670
671/*******************************************************************************
672 *
673 * FUNCTION: AcpiDsCreateOperands
674 *
675 * PARAMETERS: FirstArg - First argument of a parser argument tree
676 *
677 * RETURN: Status
678 *
679 * DESCRIPTION: Convert an operator's arguments from a parse tree format to
680 * namespace objects and place those argument object on the object
681 * stack in preparation for evaluation by the interpreter.
682 *
683 ******************************************************************************/
684
685ACPI_STATUS
686AcpiDsCreateOperands (
687 ACPI_WALK_STATE *WalkState,
688 ACPI_PARSE_OBJECT *FirstArg)
689{
690 ACPI_STATUS Status = AE_OK;
691 ACPI_PARSE_OBJECT *Arg;
692 UINT32 ArgCount = 0;
693
694
695 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperands", FirstArg);
696
697
698 /* For all arguments in the list... */
699
700 Arg = FirstArg;
701 while (Arg)
702 {
703 Status = AcpiDsCreateOperand (WalkState, Arg, ArgCount);
704 if (ACPI_FAILURE (Status))
705 {
706 goto Cleanup;
707 }
708
709 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n",
710 ArgCount, Arg, FirstArg));
711
712 /* Move on to next argument, if any */
713
714 Arg = Arg->Common.Next;
715 ArgCount++;
716 }
717
718 return_ACPI_STATUS (Status);
719
720
721Cleanup:
722 /*
723 * We must undo everything done above; meaning that we must
724 * pop everything off of the operand stack and delete those
725 * objects
726 */
727 (void) AcpiDsObjStackPopAndDelete (ArgCount, WalkState);
728
729 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While creating Arg %d - %s\n",
730 (ArgCount + 1), AcpiFormatException (Status)));
731 return_ACPI_STATUS (Status);
732}
733
734
| 370 */
371 for (i = 0; i < WalkState->NumOperands; i++)
372 {
373 Status = AcpiExResolveToValue (&WalkState->Operands[i], WalkState);
374 if (ACPI_FAILURE (Status))
375 {
376 break;
377 }
378 }
379
380 return_ACPI_STATUS (Status);
381}
382
383
384/*******************************************************************************
385 *
386 * FUNCTION: AcpiDsClearOperands
387 *
388 * PARAMETERS: WalkState - Current walk state with operands on stack
389 *
390 * RETURN: None
391 *
392 * DESCRIPTION: Clear all operands on the current walk state operand stack.
393 *
394 ******************************************************************************/
395
396void
397AcpiDsClearOperands (
398 ACPI_WALK_STATE *WalkState)
399{
400 UINT32 i;
401
402
403 ACPI_FUNCTION_TRACE_PTR ("AcpiDsClearOperands", WalkState);
404
405
406 /*
407 * Remove a reference on each operand on the stack
408 */
409 for (i = 0; i < WalkState->NumOperands; i++)
410 {
411 /*
412 * Remove a reference to all operands, including both
413 * "Arguments" and "Targets".
414 */
415 AcpiUtRemoveReference (WalkState->Operands[i]);
416 WalkState->Operands[i] = NULL;
417 }
418
419 WalkState->NumOperands = 0;
420 return_VOID;
421}
422#endif
423
424
425/*******************************************************************************
426 *
427 * FUNCTION: AcpiDsCreateOperand
428 *
429 * PARAMETERS: WalkState
430 * Arg
431 *
432 * RETURN: Status
433 *
434 * DESCRIPTION: Translate a parse tree object that is an argument to an AML
435 * opcode to the equivalent interpreter object. This may include
436 * looking up a name or entering a new name into the internal
437 * namespace.
438 *
439 ******************************************************************************/
440
441ACPI_STATUS
442AcpiDsCreateOperand (
443 ACPI_WALK_STATE *WalkState,
444 ACPI_PARSE_OBJECT *Arg,
445 UINT32 ArgIndex)
446{
447 ACPI_STATUS Status = AE_OK;
448 char *NameString;
449 UINT32 NameLength;
450 ACPI_OPERAND_OBJECT *ObjDesc;
451 ACPI_PARSE_OBJECT *ParentOp;
452 UINT16 Opcode;
453 ACPI_INTERPRETER_MODE InterpreterMode;
454 const ACPI_OPCODE_INFO *OpInfo;
455
456
457 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperand", Arg);
458
459
460 /* A valid name must be looked up in the namespace */
461
462 if ((Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP) &&
463 (Arg->Common.Value.String))
464 {
465 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", Arg));
466
467 /* Get the entire name string from the AML stream */
468
469 Status = AcpiExGetNameString (ACPI_TYPE_ANY, Arg->Common.Value.Buffer,
470 &NameString, &NameLength);
471
472 if (ACPI_FAILURE (Status))
473 {
474 return_ACPI_STATUS (Status);
475 }
476
477 /*
478 * All prefixes have been handled, and the name is
479 * in NameString
480 */
481
482
483 /*
484 * Special handling for BufferField declarations. This is a deferred
485 * opcode that unfortunately defines the field name as the last
486 * parameter instead of the first. We get here when we are performing
487 * the deferred execution, so the actual name of the field is already
488 * in the namespace. We don't want to attempt to look it up again
489 * because we may be executing in a different scope than where the
490 * actual opcode exists.
491 */
492 if ((WalkState->DeferredNode) &&
493 (WalkState->DeferredNode->Type == ACPI_TYPE_BUFFER_FIELD) &&
494 (ArgIndex != 0))
495 {
496 ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, WalkState->DeferredNode);
497 Status = AE_OK;
498 }
499 else /* All other opcodes */
500 {
501 /*
502 * Differentiate between a namespace "create" operation
503 * versus a "lookup" operation (IMODE_LOAD_PASS2 vs.
504 * IMODE_EXECUTE) in order to support the creation of
505 * namespace objects during the execution of control methods.
506 */
507 ParentOp = Arg->Common.Parent;
508 OpInfo = AcpiPsGetOpcodeInfo (ParentOp->Common.AmlOpcode);
509 if ((OpInfo->Flags & AML_NSNODE) &&
510 (ParentOp->Common.AmlOpcode != AML_INT_METHODCALL_OP) &&
511 (ParentOp->Common.AmlOpcode != AML_REGION_OP) &&
512 (ParentOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
513 {
514 /* Enter name into namespace if not found */
515
516 InterpreterMode = ACPI_IMODE_LOAD_PASS2;
517 }
518 else
519 {
520 /* Return a failure if name not found */
521
522 InterpreterMode = ACPI_IMODE_EXECUTE;
523 }
524
525 Status = AcpiNsLookup (WalkState->ScopeInfo, NameString,
526 ACPI_TYPE_ANY, InterpreterMode,
527 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
528 WalkState,
529 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &ObjDesc));
530 /*
531 * The only case where we pass through (ignore) a NOT_FOUND
532 * error is for the CondRefOf opcode.
533 */
534 if (Status == AE_NOT_FOUND)
535 {
536 if (ParentOp->Common.AmlOpcode == AML_COND_REF_OF_OP)
537 {
538 /*
539 * For the Conditional Reference op, it's OK if
540 * the name is not found; We just need a way to
541 * indicate this to the interpreter, set the
542 * object to the root
543 */
544 ObjDesc = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, AcpiGbl_RootNode);
545 Status = AE_OK;
546 }
547 else
548 {
549 /*
550 * We just plain didn't find it -- which is a
551 * very serious error at this point
552 */
553 Status = AE_AML_NAME_NOT_FOUND;
554 }
555 }
556
557 if (ACPI_FAILURE (Status))
558 {
559 ACPI_REPORT_NSERROR (NameString, Status);
560 }
561 }
562
563 /* Free the namestring created above */
564
565 ACPI_MEM_FREE (NameString);
566
567 /* Check status from the lookup */
568
569 if (ACPI_FAILURE (Status))
570 {
571 return_ACPI_STATUS (Status);
572 }
573
574 /* Put the resulting object onto the current object stack */
575
576 Status = AcpiDsObjStackPush (ObjDesc, WalkState);
577 if (ACPI_FAILURE (Status))
578 {
579 return_ACPI_STATUS (Status);
580 }
581 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
582 }
583 else
584 {
585 /* Check for null name case */
586
587 if (Arg->Common.AmlOpcode == AML_INT_NAMEPATH_OP)
588 {
589 /*
590 * If the name is null, this means that this is an
591 * optional result parameter that was not specified
592 * in the original ASL. Create a Zero Constant for a
593 * placeholder. (Store to a constant is a Noop.)
594 */
595 Opcode = AML_ZERO_OP; /* Has no arguments! */
596
597 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Null namepath: Arg=%p\n", Arg));
598 }
599 else
600 {
601 Opcode = Arg->Common.AmlOpcode;
602 }
603
604 /* Get the object type of the argument */
605
606 OpInfo = AcpiPsGetOpcodeInfo (Opcode);
607 if (OpInfo->ObjectType == ACPI_TYPE_INVALID)
608 {
609 return_ACPI_STATUS (AE_NOT_IMPLEMENTED);
610 }
611
612 if (OpInfo->Flags & AML_HAS_RETVAL)
613 {
614 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
615 "Argument previously created, already stacked \n"));
616
617 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (
618 WalkState->Operands [WalkState->NumOperands - 1], WalkState));
619
620 /*
621 * Use value that was already previously returned
622 * by the evaluation of this argument
623 */
624 Status = AcpiDsResultPopFromBottom (&ObjDesc, WalkState);
625 if (ACPI_FAILURE (Status))
626 {
627 /*
628 * Only error is underflow, and this indicates
629 * a missing or null operand!
630 */
631 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Missing or null operand, %s\n",
632 AcpiFormatException (Status)));
633 return_ACPI_STATUS (Status);
634 }
635 }
636 else
637 {
638 /* Create an ACPI_INTERNAL_OBJECT for the argument */
639
640 ObjDesc = AcpiUtCreateInternalObject (OpInfo->ObjectType);
641 if (!ObjDesc)
642 {
643 return_ACPI_STATUS (AE_NO_MEMORY);
644 }
645
646 /* Initialize the new object */
647
648 Status = AcpiDsInitObjectFromOp (WalkState, Arg,
649 Opcode, &ObjDesc);
650 if (ACPI_FAILURE (Status))
651 {
652 AcpiUtDeleteObjectDesc (ObjDesc);
653 return_ACPI_STATUS (Status);
654 }
655 }
656
657 /* Put the operand object on the object stack */
658
659 Status = AcpiDsObjStackPush (ObjDesc, WalkState);
660 if (ACPI_FAILURE (Status))
661 {
662 return_ACPI_STATUS (Status);
663 }
664
665 ACPI_DEBUGGER_EXEC (AcpiDbDisplayArgumentObject (ObjDesc, WalkState));
666 }
667
668 return_ACPI_STATUS (AE_OK);
669}
670
671
672/*******************************************************************************
673 *
674 * FUNCTION: AcpiDsCreateOperands
675 *
676 * PARAMETERS: FirstArg - First argument of a parser argument tree
677 *
678 * RETURN: Status
679 *
680 * DESCRIPTION: Convert an operator's arguments from a parse tree format to
681 * namespace objects and place those argument object on the object
682 * stack in preparation for evaluation by the interpreter.
683 *
684 ******************************************************************************/
685
686ACPI_STATUS
687AcpiDsCreateOperands (
688 ACPI_WALK_STATE *WalkState,
689 ACPI_PARSE_OBJECT *FirstArg)
690{
691 ACPI_STATUS Status = AE_OK;
692 ACPI_PARSE_OBJECT *Arg;
693 UINT32 ArgCount = 0;
694
695
696 ACPI_FUNCTION_TRACE_PTR ("DsCreateOperands", FirstArg);
697
698
699 /* For all arguments in the list... */
700
701 Arg = FirstArg;
702 while (Arg)
703 {
704 Status = AcpiDsCreateOperand (WalkState, Arg, ArgCount);
705 if (ACPI_FAILURE (Status))
706 {
707 goto Cleanup;
708 }
709
710 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Arg #%d (%p) done, Arg1=%p\n",
711 ArgCount, Arg, FirstArg));
712
713 /* Move on to next argument, if any */
714
715 Arg = Arg->Common.Next;
716 ArgCount++;
717 }
718
719 return_ACPI_STATUS (Status);
720
721
722Cleanup:
723 /*
724 * We must undo everything done above; meaning that we must
725 * pop everything off of the operand stack and delete those
726 * objects
727 */
728 (void) AcpiDsObjStackPopAndDelete (ArgCount, WalkState);
729
730 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "While creating Arg %d - %s\n",
731 (ArgCount + 1), AcpiFormatException (Status)));
732 return_ACPI_STATUS (Status);
733}
734
735
|