1 /****************************************************************************** 2 * 3 * Module Name: exoparg3 - AML execution - opcodes with 3 arguments 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 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 " 109 "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n", 110 (UINT32) Operand[0]->Integer.Value, 111 (UINT32) Operand[1]->Integer.Value, 112 (UINT32) Operand[2]->Integer.Value)); 113 114 Fatal = ACPI_ALLOCATE (sizeof (ACPI_SIGNAL_FATAL_INFO)); 115 if (Fatal) 116 { 117 Fatal->Type = (UINT32) Operand[0]->Integer.Value; 118 Fatal->Code = (UINT32) Operand[1]->Integer.Value; 119 Fatal->Argument = (UINT32) Operand[2]->Integer.Value; 120 } 121 122 /* Always signal the OS! */ 123 124 Status = AcpiOsSignal (ACPI_SIGNAL_FATAL, Fatal); 125 126 /* Might return while OS is shutting down, just continue */ 127 128 ACPI_FREE (Fatal); 129 goto Cleanup; 130 131 case AML_EXTERNAL_OP: 132 /* 133 * If the interpreter sees this opcode, just ignore it. The External 134 * op is intended for use by disassemblers in order to properly 135 * disassemble control method invocations. The opcode or group of 136 * opcodes should be surrounded by an "if (0)" clause to ensure that 137 * AML interpreters never see the opcode. 138 */ 139 Status = AE_OK; 140 goto Cleanup; 141 142 default: 143 144 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 145 WalkState->Opcode)); 146 147 Status = AE_AML_BAD_OPCODE; 148 goto Cleanup; 149 } 150 151 152 Cleanup: 153 154 return_ACPI_STATUS (Status); 155 } 156 157 158 /******************************************************************************* 159 * 160 * FUNCTION: AcpiExOpcode_3A_1T_1R 161 * 162 * PARAMETERS: WalkState - Current walk state 163 * 164 * RETURN: Status 165 * 166 * DESCRIPTION: Execute Triadic operator (3 operands) 167 * 168 ******************************************************************************/ 169 170 ACPI_STATUS 171 AcpiExOpcode_3A_1T_1R ( 172 ACPI_WALK_STATE *WalkState) 173 { 174 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 175 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 176 char *Buffer = NULL; 177 ACPI_STATUS Status = AE_OK; 178 UINT64 Index; 179 ACPI_SIZE Length; 180 181 182 ACPI_FUNCTION_TRACE_STR (ExOpcode_3A_1T_1R, 183 AcpiPsGetOpcodeName (WalkState->Opcode)); 184 185 186 switch (WalkState->Opcode) 187 { 188 case AML_MID_OP: /* Mid (Source[0], Index[1], Length[2], Result[3]) */ 189 /* 190 * Create the return object. The Source operand is guaranteed to be 191 * either a String or a Buffer, so just use its type. 192 */ 193 ReturnDesc = AcpiUtCreateInternalObject ( 194 (Operand[0])->Common.Type); 195 if (!ReturnDesc) 196 { 197 Status = AE_NO_MEMORY; 198 goto Cleanup; 199 } 200 201 /* Get the Integer values from the objects */ 202 203 Index = Operand[1]->Integer.Value; 204 Length = (ACPI_SIZE) Operand[2]->Integer.Value; 205 206 /* 207 * If the index is beyond the length of the String/Buffer, or if the 208 * requested length is zero, return a zero-length String/Buffer 209 */ 210 if (Index >= Operand[0]->String.Length) 211 { 212 Length = 0; 213 } 214 215 /* Truncate request if larger than the actual String/Buffer */ 216 217 else if ((Index + Length) > Operand[0]->String.Length) 218 { 219 Length = 220 (ACPI_SIZE) Operand[0]->String.Length - (ACPI_SIZE) Index; 221 } 222 223 /* Strings always have a sub-pointer, not so for buffers */ 224 225 switch ((Operand[0])->Common.Type) 226 { 227 case ACPI_TYPE_STRING: 228 229 /* Always allocate a new buffer for the String */ 230 231 Buffer = ACPI_ALLOCATE_ZEROED ((ACPI_SIZE) Length + 1); 232 if (!Buffer) 233 { 234 Status = AE_NO_MEMORY; 235 goto Cleanup; 236 } 237 break; 238 239 case ACPI_TYPE_BUFFER: 240 241 /* If the requested length is zero, don't allocate a buffer */ 242 243 if (Length > 0) 244 { 245 /* Allocate a new buffer for the Buffer */ 246 247 Buffer = ACPI_ALLOCATE_ZEROED (Length); 248 if (!Buffer) 249 { 250 Status = AE_NO_MEMORY; 251 goto Cleanup; 252 } 253 } 254 break; 255 256 default: /* Should not happen */ 257 258 Status = AE_AML_OPERAND_TYPE; 259 goto Cleanup; 260 } 261 262 if (Buffer) 263 { 264 /* We have a buffer, copy the portion requested */ 265 266 memcpy (Buffer, 267 Operand[0]->String.Pointer + Index, Length); 268 } 269 270 /* Set the length of the new String/Buffer */ 271 272 ReturnDesc->String.Pointer = Buffer; 273 ReturnDesc->String.Length = (UINT32) Length; 274 275 /* Mark buffer initialized */ 276 277 ReturnDesc->Buffer.Flags |= AOPOBJ_DATA_VALID; 278 break; 279 280 default: 281 282 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 283 WalkState->Opcode)); 284 285 Status = AE_AML_BAD_OPCODE; 286 goto Cleanup; 287 } 288 289 /* Store the result in the target */ 290 291 Status = AcpiExStore (ReturnDesc, Operand[3], WalkState); 292 293 Cleanup: 294 295 /* Delete return object on error */ 296 297 if (ACPI_FAILURE (Status) || WalkState->ResultObj) 298 { 299 AcpiUtRemoveReference (ReturnDesc); 300 WalkState->ResultObj = NULL; 301 } 302 else 303 { 304 /* Set the return object and exit */ 305 306 WalkState->ResultObj = ReturnDesc; 307 } 308 309 return_ACPI_STATUS (Status); 310 } 311