1 /******************************************************************************
2 *
3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, 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 #include "acpi.h"
45 #include "accommon.h"
46 #include "acinterp.h"
47 #include "acparser.h"
48 #include "amlcode.h"
49
50
51 #define _COMPONENT ACPI_EXECUTER
52 ACPI_MODULE_NAME ("exoparg3")
53
54
55 /*!
56 * Naming convention for AML interpreter execution routines.
57 *
58 * The routines that begin execution of AML opcodes are named with a common
59 * convention based upon the number of arguments, the number of target operands,
60 * and whether or not a value is returned:
61 *
62 * AcpiExOpcode_xA_yT_zR
63 *
64 * Where:
65 *
66 * xA - ARGUMENTS: The number of arguments (input operands) that are
67 * required for this opcode type (1 through 6 args).
68 * yT - TARGETS: The number of targets (output operands) that are required
69 * for this opcode type (0, 1, or 2 targets).
70 * zR - RETURN VALUE: Indicates whether this opcode type returns a value
71 * as the function return (0 or 1).
72 *
73 * The AcpiExOpcode* functions are called via the Dispatcher component with
74 * fully resolved operands.
75 !*/
76
77
78 /*******************************************************************************
79 *
80 * FUNCTION: AcpiExOpcode_3A_0T_0R
81 *
82 * PARAMETERS: WalkState - Current walk state
83 *
84 * RETURN: Status
85 *
86 * DESCRIPTION: Execute Triadic operator (3 operands)
87 *
88 ******************************************************************************/
89
90 ACPI_STATUS
AcpiExOpcode_3A_0T_0R(ACPI_WALK_STATE * WalkState)91 AcpiExOpcode_3A_0T_0R (
92 ACPI_WALK_STATE *WalkState)
93 {
94 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
95 ACPI_SIGNAL_FATAL_INFO *Fatal;
96 ACPI_STATUS Status = AE_OK;
97
98
99 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_0T_0R,
100 AcpiPsGetOpcodeName (WalkState->Opcode));
101
102
103 switch (WalkState->Opcode)
104 {
105 case AML_FATAL_OP: /* Fatal (FatalType FatalCode FatalArg) */
106
107 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
108 "FatalOp: Type %X Code %X Arg %X <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n",
109 (UINT32) Operand[0]->Integer.Value,
110 (UINT32) Operand[1]->Integer.Value,
111 (UINT32) Operand[2]->Integer.Value));
112
113 Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO));
114 if (Fatal)
115 {
116 Fatal->Type = (UINT32) Operand[0]->Integer.Value;
117 Fatal->Code = (UINT32) Operand[1]->Integer.Value;
118 Fatal->Argument = (UINT32) Operand[2]->Integer.Value;
119 }
120
121 /* Always signal the OS! */
122
123 Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal);
124
125 /* Might return while OS is shutting down, just continue */
126
127 ACPI_FREE (Fatal);
128 break;
129
130 default:
131
132 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
133 WalkState->Opcode));
134 Status = AE_AML_BAD_OPCODE;
135 goto Cleanup;
136 }
137
138
139 Cleanup:
140
141 return_ACPI_STATUS (Status);
142 }
143
144
145 /*******************************************************************************
146 *
147 * FUNCTION: AcpiExOpcode_3A_1T_1R
148 *
149 * PARAMETERS: WalkState - Current walk state
150 *
151 * RETURN: Status
152 *
153 * DESCRIPTION: Execute Triadic operator (3 operands)
154 *
155 ******************************************************************************/
156
157 ACPI_STATUS
AcpiExOpcode_3A_1T_1R(ACPI_WALK_STATE * WalkState)158 AcpiExOpcode_3A_1T_1R (
159 ACPI_WALK_STATE *WalkState)
160 {
161 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
162 ACPI_OPERAND_OBJECT *ReturnDesc = NULL;
163 char *Buffer = NULL;
164 ACPI_STATUS Status = AE_OK;
165 UINT64 Index;
166 ACPI_SIZE Length;
167
168
169 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R,
170 AcpiPsGetOpcodeName (WalkState->Opcode));
171
172
173 switch (WalkState->Opcode)
174 {
175 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */
176 /*
177 * Create the return object. The Source operand is guaranteed to be
178 * either a String or a Buffer, so just use its type.
179 */
180 ReturnDesc = AcpiUtCreateInternalObject (
181 (Operand[0])->Common.Type);
182 if (!ReturnDesc)
183 {
184 Status = AE_NO_MEMORY;
185 goto Cleanup;
186 }
187
188 /* Get the Integer values from the objects */
189
190 Index = Operand[1]->Integer.Value;
191 Length = (ACPI_SIZE) Operand[2]->Integer.Value;
192
193 /*
194 * If the index is beyond the length of the String/Buffer, or if the
195 * requested length is zero, return a zero-length String/Buffer
196 */
197 if (Index >= Operand[0]->String.Length)
198 {
199 Length = 0;
200 }
201
202 /* Truncate request if larger than the actual String/Buffer */
203
204 else if ((Index + Length) > Operand[0]->String.Length)
205 {
206 Length = (ACPI_SIZE) Operand[0]->String.Length -
207 (ACPI_SIZE) Index;
208 }
209
210 /* Strings always have a sub-pointer, not so for buffers */
211
212 switch ((Operand[0])->Common.Type)
213 {
214 case ACPI_TYPE_STRING:
215
216 /* Always allocate a new buffer for the String */
217
218 Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1);
219 if (!Buffer)
220 {
221 Status = AE_NO_MEMORY;
222 goto Cleanup;
223 }
224 break;
225
226 case ACPI_TYPE_BUFFER:
227
228 /* If the requested length is zero, don't allocate a buffer */
229
230 if (Length > 0)
231 {
232 /* Allocate a new buffer for the Buffer */
233
234 Buffer = ACPI_ALLOCATE_ZEROED (Length);
235 if (!Buffer)
236 {
237 Status = AE_NO_MEMORY;
238 goto Cleanup;
239 }
240 }
241 break;
242
243 default: /* Should not happen */
244
245 Status = AE_AML_OPERAND_TYPE;
246 goto Cleanup;
247 }
248
249 if (Buffer)
250 {
251 /* We have a buffer, copy the portion requested */
252
253 ACPI_MEMCPY (Buffer, Operand[0]->String.Pointer + Index,
254 Length);
255 }
256
257 /* Set the length of the new String/Buffer */
258
259 ReturnDesc->String.Pointer = Buffer;
260 ReturnDesc->String.Length = (UINT32) Length;
261
262 /* Mark buffer initialized */
263
264 ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
265 break;
266
267 default:
268
269 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X",
270 WalkState->Opcode));
271 Status = AE_AML_BAD_OPCODE;
272 goto Cleanup;
273 }
274
275 /* Store the result in the target */
276
277 Status = AcpiExStore (ReturnDesc, Operand[3], WalkState);
278
279 Cleanup:
280
281 /* Delete return object on error */
282
283 if (ACPI_FAILURE (Status) || WalkState->ResultObj)
284 {
285 AcpiUtRemoveReference (ReturnDesc);
286 WalkState->ResultObj = NULL;
287 }
288
289 /* Set the return object and exit */
290
291 else
292 {
293 WalkState->ResultObj = ReturnDesc;
294 }
295 return_ACPI_STATUS (Status);
296 }
297