1 /****************************************************************************** 2 * 3 * Module Name: nsarguments - Validation of args for ACPI predefined methods 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include <contrib/dev/acpica/include/acpi.h> 153 #include <contrib/dev/acpica/include/accommon.h> 154 #include <contrib/dev/acpica/include/acnamesp.h> 155 #include <contrib/dev/acpica/include/acpredef.h> 156 157 158 #define _COMPONENT ACPI_NAMESPACE 159 ACPI_MODULE_NAME ("nsarguments") 160 161 162 /******************************************************************************* 163 * 164 * FUNCTION: AcpiNsCheckArgumentTypes 165 * 166 * PARAMETERS: Info - Method execution information block 167 * 168 * RETURN: None 169 * 170 * DESCRIPTION: Check the incoming argument count and all argument types 171 * against the argument type list for a predefined name. 172 * 173 ******************************************************************************/ 174 175 void 176 AcpiNsCheckArgumentTypes ( 177 ACPI_EVALUATE_INFO *Info) 178 { 179 UINT16 ArgTypeList; 180 UINT8 ArgCount; 181 UINT8 ArgType; 182 UINT8 UserArgType; 183 UINT32 i; 184 185 186 /* 187 * If not a predefined name, cannot typecheck args, because 188 * we have no idea what argument types are expected. 189 * Also, ignore typecheck if warnings/errors if this method 190 * has already been evaluated at least once -- in order 191 * to suppress repetitive messages. 192 */ 193 if (!Info->Predefined || (Info->Node->Flags & ANOBJ_EVALUATED)) 194 { 195 return; 196 } 197 198 ArgTypeList = Info->Predefined->Info.ArgumentList; 199 ArgCount = METHOD_GET_ARG_COUNT (ArgTypeList); 200 201 /* Typecheck all arguments */ 202 203 for (i = 0; ((i < ArgCount) && (i < Info->ParamCount)); i++) 204 { 205 ArgType = METHOD_GET_NEXT_TYPE (ArgTypeList); 206 UserArgType = Info->Parameters[i]->Common.Type; 207 208 /* No typechecking for ACPI_TYPE_ANY */ 209 210 if ((UserArgType != ArgType) && (ArgType != ACPI_TYPE_ANY)) 211 { 212 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS, 213 "Argument #%u type mismatch - " 214 "Found [%s], ACPI requires [%s]", (i + 1), 215 AcpiUtGetTypeName (UserArgType), 216 AcpiUtGetTypeName (ArgType))); 217 218 /* Prevent any additional typechecking for this method */ 219 220 Info->Node->Flags |= ANOBJ_EVALUATED; 221 } 222 } 223 } 224 225 226 /******************************************************************************* 227 * 228 * FUNCTION: AcpiNsCheckAcpiCompliance 229 * 230 * PARAMETERS: Pathname - Full pathname to the node (for error msgs) 231 * Node - Namespace node for the method/object 232 * Predefined - Pointer to entry in predefined name table 233 * 234 * RETURN: None 235 * 236 * DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a 237 * predefined name is what is expected (matches what is defined in 238 * the ACPI specification for this predefined name.) 239 * 240 ******************************************************************************/ 241 242 void 243 AcpiNsCheckAcpiCompliance ( 244 char *Pathname, 245 ACPI_NAMESPACE_NODE *Node, 246 const ACPI_PREDEFINED_INFO *Predefined) 247 { 248 UINT32 AmlParamCount; 249 UINT32 RequiredParamCount; 250 251 252 if (!Predefined || (Node->Flags & ANOBJ_EVALUATED)) 253 { 254 return; 255 } 256 257 /* Get the ACPI-required arg count from the predefined info table */ 258 259 RequiredParamCount = 260 METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList); 261 262 /* 263 * If this object is not a control method, we can check if the ACPI 264 * spec requires that it be a method. 265 */ 266 if (Node->Type != ACPI_TYPE_METHOD) 267 { 268 if (RequiredParamCount > 0) 269 { 270 /* Object requires args, must be implemented as a method */ 271 272 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 273 "Object (%s) must be a control method with %u arguments", 274 AcpiUtGetTypeName (Node->Type), RequiredParamCount)); 275 } 276 else if (!RequiredParamCount && !Predefined->Info.ExpectedBtypes) 277 { 278 /* Object requires no args and no return value, must be a method */ 279 280 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 281 "Object (%s) must be a control method " 282 "with no arguments and no return value", 283 AcpiUtGetTypeName (Node->Type))); 284 } 285 286 return; 287 } 288 289 /* 290 * This is a control method. 291 * Check that the ASL/AML-defined parameter count for this method 292 * matches the ACPI-required parameter count 293 * 294 * Some methods are allowed to have a "minimum" number of args (_SCP) 295 * because their definition in ACPI has changed over time. 296 * 297 * Note: These are BIOS errors in the declaration of the object 298 */ 299 AmlParamCount = Node->Object->Method.ParamCount; 300 301 if (AmlParamCount < RequiredParamCount) 302 { 303 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 304 "Insufficient arguments - " 305 "ASL declared %u, ACPI requires %u", 306 AmlParamCount, RequiredParamCount)); 307 } 308 else if ((AmlParamCount > RequiredParamCount) && 309 !(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM)) 310 { 311 ACPI_BIOS_ERROR_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 312 "Excess arguments - " 313 "ASL declared %u, ACPI requires %u", 314 AmlParamCount, RequiredParamCount)); 315 } 316 } 317 318 319 /******************************************************************************* 320 * 321 * FUNCTION: AcpiNsCheckArgumentCount 322 * 323 * PARAMETERS: Pathname - Full pathname to the node (for error msgs) 324 * Node - Namespace node for the method/object 325 * UserParamCount - Number of args passed in by the caller 326 * Predefined - Pointer to entry in predefined name table 327 * 328 * RETURN: None 329 * 330 * DESCRIPTION: Check that incoming argument count matches the declared 331 * parameter count (in the ASL/AML) for an object. 332 * 333 ******************************************************************************/ 334 335 void 336 AcpiNsCheckArgumentCount ( 337 char *Pathname, 338 ACPI_NAMESPACE_NODE *Node, 339 UINT32 UserParamCount, 340 const ACPI_PREDEFINED_INFO *Predefined) 341 { 342 UINT32 AmlParamCount; 343 UINT32 RequiredParamCount; 344 345 346 if (Node->Flags & ANOBJ_EVALUATED) 347 { 348 return; 349 } 350 351 if (!Predefined) 352 { 353 /* 354 * Not a predefined name. Check the incoming user argument count 355 * against the count that is specified in the method/object. 356 */ 357 if (Node->Type != ACPI_TYPE_METHOD) 358 { 359 if (UserParamCount) 360 { 361 ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 362 "%u arguments were passed to a non-method ACPI object (%s)", 363 UserParamCount, AcpiUtGetTypeName (Node->Type))); 364 } 365 366 return; 367 } 368 369 /* 370 * This is a control method. Check the parameter count. 371 * We can only check the incoming argument count against the 372 * argument count declared for the method in the ASL/AML. 373 * 374 * Emit a message if too few or too many arguments have been passed 375 * by the caller. 376 * 377 * Note: Too many arguments will not cause the method to 378 * fail. However, the method will fail if there are too few 379 * arguments and the method attempts to use one of the missing ones. 380 */ 381 AmlParamCount = Node->Object->Method.ParamCount; 382 383 if (UserParamCount < AmlParamCount) 384 { 385 ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 386 "Insufficient arguments - " 387 "Caller passed %u, method requires %u", 388 UserParamCount, AmlParamCount)); 389 } 390 else if (UserParamCount > AmlParamCount) 391 { 392 ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 393 "Excess arguments - " 394 "Caller passed %u, method requires %u", 395 UserParamCount, AmlParamCount)); 396 } 397 398 return; 399 } 400 401 /* 402 * This is a predefined name. Validate the user-supplied parameter 403 * count against the ACPI specification. We don't validate against 404 * the method itself because what is important here is that the 405 * caller is in conformance with the spec. (The arg count for the 406 * method was checked against the ACPI spec earlier.) 407 * 408 * Some methods are allowed to have a "minimum" number of args (_SCP) 409 * because their definition in ACPI has changed over time. 410 */ 411 RequiredParamCount = 412 METHOD_GET_ARG_COUNT (Predefined->Info.ArgumentList); 413 414 if (UserParamCount < RequiredParamCount) 415 { 416 ACPI_WARN_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 417 "Insufficient arguments - " 418 "Caller passed %u, ACPI requires %u", 419 UserParamCount, RequiredParamCount)); 420 } 421 else if ((UserParamCount > RequiredParamCount) && 422 !(Predefined->Info.ArgumentList & ARG_COUNT_IS_MINIMUM)) 423 { 424 ACPI_INFO_PREDEFINED ((AE_INFO, Pathname, ACPI_WARN_ALWAYS, 425 "Excess arguments - " 426 "Caller passed %u, ACPI requires %u", 427 UserParamCount, RequiredParamCount)); 428 } 429 } 430