1 /******************************************************************************
2 *
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #define __EXOPARG3_C__
45
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acinterp.h"
49 #include "acparser.h"
50 #include "amlcode.h"
51
52
53 #define _COMPONENT ACPI_EXECUTER
54 ACPI_MODULE_NAME ("exoparg3")
55
56
57 /*!
58 * Naming convention for AML interpreter execution routines.
59 *
60 * The routines that begin execution of AML opcodes are named with a common
61 * convention based upon the number of arguments, the number of target operands,
62 * and whether or not a value is returned:
63 *
64 * AcpiExOpcode_xA_yT_zR
65 *
66 * Where:
67 *
68 * xA - ARGUMENTS: The number of arguments (input operands) that are
69 * required for this opcode type (1 through 6 args).
70 * yT - TARGETS: The number of targets (output operands) that are required
71 * for this opcode type (0, 1, or 2 targets).
72 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
73 * as the function return (0 or 1).
74 *
75 * The AcpiExOpcode* functions are called via the Dispatcher component with
76 * fully resolved operands.
77 !*/
78
79
80 /*******************************************************************************
81 *
82 * FUNCTION: AcpiExOpcode_3A_0T_0R
83 *
84 * PARAMETERS: WalkState - Current walk state
85 *
86 * RETURN: Status
87 *
88 * DESCRIPTION: Execute Triadic operator (3 operands)
89 *
90 ******************************************************************************/
91
92 ACPI_STATUS
93 AcpiExOpcode_3A_0T_0R (
94 ACPI_WALK_STATE *WalkState)
95 {
96 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
97 ACPI_SIGNAL_FATAL_INFO *Fatal;
98 ACPI_STATUS Status = AE_OK;
99
100
101 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
102 AcpiPsGetOpcodeName (WalkState->Opcode));
103
104
105 switch (WalkState->Opcode)
106 {
107 case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
108
109 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
110 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
111 (UINT32) Operand[0]->Integer.Value,
112 (UINT32) Operand[1]->Integer.Value,
113 (UINT32) Operand[2]->Integer.Value));
114
115 Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
116 if (Fatal)
117 {
118 Fatal->Type = (UINT32) Operand[0]->Integer.Value;
119 Fatal->Code = (UINT32) Operand[1]->Integer.Value;
120 Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
121 }
122
123 /* Always signal the OS! */
124
125 Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
126
127 /* Might return while OS is shutting down, just continue */
128
129 ACPI_FREE (Fatal);
130 break;
131
132 default:
133
134 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
135 WalkState->Opcode));
136 Status = AE_AML_BAD_OPCODE;
137 goto Cleanup;
138 }
139
140
141 Cleanup:
142
143 return_ACPI_STATUS (Status);
144 }
145
146
147 /*******************************************************************************
148 *
149 * FUNCTION: AcpiExOpcode_3A_1T_1R
150 *
151 * PARAMETERS: WalkState - Current walk state
152 *
153 * RETURN: Status
154 *
155 * DESCRIPTION: Execute Triadic operator (3 operands)
156 *
157 ******************************************************************************/
158
159 ACPI_STATUS
160 AcpiExOpcode_3A_1T_1R (
161 ACPI_WALK_STATE *WalkState)
162 {
163 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
164 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
165 char *Buffer = NULL;
166 ACPI_STATUS Status = AE_OK;
167 UINT64 Index;
168 ACPI_SIZE Length;
169
170
171 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
172 AcpiPsGetOpcodeName (WalkState->Opcode));
173
174
175 switch (WalkState->Opcode)
176 {
177 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
178 /*
179 * Create the return object. The Source operand is guaranteed to be
180 * either a String or a Buffer, so just use its type.
181 */
182 ReturnDesc = AcpiUtCreateInternalObject (
183 (Operand[0])->Common.Type);
184 if (!ReturnDesc)
185 {
186 Status = AE_NO_MEMORY;
187 goto Cleanup;
188 }
189
190 /* Get the Integer values from the objects */
191
192 Index = Operand[1]->Integer.Value;
193 Length = (ACPI_SIZE) Operand[2]->Integer.Value;
194
195 /*
196 * If the index is beyond the length of the String/Buffer, or if the
197 * requested length is zero, return a zero-length String/Buffer
198 */
199 if (Index >= Operand[0]->String.Length)
200 {
201 Length = 0;
202 }
203
204 /* Truncate request if larger than the actual String/Buffer */
205
206 else if ((Index + Length) > Operand[0]->String.Length)
207 {
208 Length = (ACPI_SIZE) Operand[0]->String.Length -
209 (ACPI_SIZE) Index;
210 }
211
212 /* Strings always have a sub-pointer, not so for buffers */
213
214 switch ((Operand[0])->Common.Type)
215 {
216 case ACPI_TYPE_STRING:
217
218 /* Always allocate a new buffer for the String */
219
220 Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
221 if (!Buffer)
222 {
223 Status = AE_NO_MEMORY;
224 goto Cleanup;
225 }
226 break;
227
228 case ACPI_TYPE_BUFFER:
229
230 /* If the requested length is zero, don't allocate a buffer */
231
232 if (Length > 0)
233 {
234 /* Allocate a new buffer for the Buffer */
235
236 Buffer = ACPI_ALLOCATE_ZEROED (Length);
237 if (!Buffer)
238 {
239 Status = AE_NO_MEMORY;
240 goto Cleanup;
241 }
242 }
243 break;
244
245 default: /* Should not happen */
246
247 Status = AE_AML_OPERAND_TYPE;
248 goto Cleanup;
249 }
250
251 if (Buffer)
252 {
253 /* We have a buffer, copy the portion requested */
254
255 ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
256 Length);
257 }
258
259 /* Set the length of the new String/Buffer */
260
261 ReturnDesc->String.Pointer = Buffer;
262 ReturnDesc->String.Length = (UINT32) Length;
263
264 /* Mark buffer initialized */
265
266 ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
267 break;
268
269 default:
270
271 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
272 WalkState->Opcode));
273 Status = AE_AML_BAD_OPCODE;
274 goto Cleanup;
275 }
276
277 /* Store the result in the target */
278
279 Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
280
281 Cleanup:
282
283 /* Delete return object on error */
284
285 if (ACPI_FAILURE (Status) || WalkState->ResultObj)
286 {
287 AcpiUtRemoveReference (ReturnDesc);
288 WalkState->ResultObj = NULL;
289 }
290
291 /* Set the return object and exit */
292
293 else
294 {
295 WalkState->ResultObj = ReturnDesc;
296 }
297 return_ACPI_STATUS (Status);
298 }