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 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 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