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psargs.c
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linux-6.19.14/drivers/acpi/acpica/psargs.c
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2/****************************************************************************** 3 * 4 * Module Name: psargs - Parse AML opcode arguments 5 * 6 * Copyright (C) 2000 - 2025, Intel Corp. 7 * 8 *****************************************************************************/ 9 10#include <acpi/acpi.h> 11#include "accommon.h" 12#include "acparser.h" 13#include "amlcode.h" 14#include "acnamesp.h" 15#include "acdispat.h" 16#include "acconvert.h" 17 18#define _COMPONENT ACPI_PARSER 19ACPI_MODULE_NAME("psargs") 20 21/* Local prototypes */ 22static u32 23acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); 24 25static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 26 *parser_state); 27 28static void acpi_ps_free_field_list(union acpi_parse_object *start); 29 30/******************************************************************************* 31 * 32 * FUNCTION: acpi_ps_get_next_package_length 33 * 34 * PARAMETERS: parser_state - Current parser state object 35 * 36 * RETURN: Decoded package length. On completion, the AML pointer points 37 * past the length byte or bytes. 38 * 39 * DESCRIPTION: Decode and return a package length field. 40 * Note: Largest package length is 28 bits, from ACPI specification 41 * 42 ******************************************************************************/ 43 44static u32 45acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state) 46{ 47 u8 *aml = parser_state->aml; 48 u32 package_length = 0; 49 u32 byte_count; 50 u8 byte_zero_mask = 0x3F; /* Default [0:5] */ 51 52 ACPI_FUNCTION_TRACE(ps_get_next_package_length); 53 54 /* 55 * Byte 0 bits [6:7] contain the number of additional bytes 56 * used to encode the package length, either 0,1,2, or 3 57 */ 58 byte_count = (aml[0] >> 6); 59 parser_state->aml += ((acpi_size)byte_count + 1); 60 61 /* Get bytes 3, 2, 1 as needed */ 62 63 while (byte_count) { 64 /* 65 * Final bit positions for the package length bytes: 66 * Byte3->[20:27] 67 * Byte2->[12:19] 68 * Byte1->[04:11] 69 * Byte0->[00:03] 70 */ 71 package_length |= (aml[byte_count] << ((byte_count << 3) - 4)); 72 73 byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */ 74 byte_count--; 75 } 76 77 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ 78 79 package_length |= (aml[0] & byte_zero_mask); 80 return_UINT32(package_length); 81} 82 83/******************************************************************************* 84 * 85 * FUNCTION: acpi_ps_get_next_package_end 86 * 87 * PARAMETERS: parser_state - Current parser state object 88 * 89 * RETURN: Pointer to end-of-package +1 90 * 91 * DESCRIPTION: Get next package length and return a pointer past the end of 92 * the package. Consumes the package length field 93 * 94 ******************************************************************************/ 95 96u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state) 97{ 98 u8 *start = parser_state->aml; 99 u32 package_length; 100 101 ACPI_FUNCTION_TRACE(ps_get_next_package_end); 102 103 /* Function below updates parser_state->Aml */ 104 105 package_length = acpi_ps_get_next_package_length(parser_state); 106 107 return_PTR(start + package_length); /* end of package */ 108} 109 110/******************************************************************************* 111 * 112 * FUNCTION: acpi_ps_get_next_namestring 113 * 114 * PARAMETERS: parser_state - Current parser state object 115 * 116 * RETURN: Pointer to the start of the name string (pointer points into 117 * the AML. 118 * 119 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name 120 * prefix characters. Set parser state to point past the string. 121 * (Name is consumed from the AML.) 122 * 123 ******************************************************************************/ 124 125char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state) 126{ 127 u8 *start = parser_state->aml; 128 u8 *end = parser_state->aml; 129 130 ACPI_FUNCTION_TRACE(ps_get_next_namestring); 131 132 /* Point past any namestring prefix characters (backslash or carat) */ 133 134 while (ACPI_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*end)) { 135 end++; 136 } 137 138 /* Decode the path prefix character */ 139 140 switch (*end) { 141 case 0: 142 143 /* null_name */ 144 145 if (end == start) { 146 start = NULL; 147 } 148 end++; 149 break; 150 151 case AML_DUAL_NAME_PREFIX: 152 153 /* Two name segments */ 154 155 end += 1 + (2 * ACPI_NAMESEG_SIZE); 156 break; 157 158 case AML_MULTI_NAME_PREFIX: 159 160 /* Multiple name segments, 4 chars each, count in next byte */ 161 162 end += 2 + (*(end + 1) * ACPI_NAMESEG_SIZE); 163 break; 164 165 default: 166 167 /* Single name segment */ 168 169 end += ACPI_NAMESEG_SIZE; 170 break; 171 } 172 173 parser_state->aml = end; 174 return_PTR((char *)start); 175} 176 177/******************************************************************************* 178 * 179 * FUNCTION: acpi_ps_get_next_namepath 180 * 181 * PARAMETERS: parser_state - Current parser state object 182 * arg - Where the namepath will be stored 183 * arg_count - If the namepath points to a control method 184 * the method's argument is returned here. 185 * possible_method_call - Whether the namepath can possibly be the 186 * start of a method call 187 * 188 * RETURN: Status 189 * 190 * DESCRIPTION: Get next name (if method call, return # of required args). 191 * Names are looked up in the internal namespace to determine 192 * if the name represents a control method. If a method 193 * is found, the number of arguments to the method is returned. 194 * This information is critical for parsing to continue correctly. 195 * 196 ******************************************************************************/ 197 198acpi_status 199acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state, 200 struct acpi_parse_state *parser_state, 201 union acpi_parse_object *arg, u8 possible_method_call) 202{ 203 acpi_status status; 204 char *path; 205 union acpi_parse_object *name_op; 206 union acpi_operand_object *method_desc; 207 struct acpi_namespace_node *node; 208 u8 *start = parser_state->aml; 209 210 ACPI_FUNCTION_TRACE(ps_get_next_namepath); 211 212 path = acpi_ps_get_next_namestring(parser_state); 213 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 214 215 /* Null path case is allowed, just exit */ 216 217 if (!path) { 218 arg->common.value.name = path; 219 return_ACPI_STATUS(AE_OK); 220 } 221 222 /* 223 * Lookup the name in the internal namespace, starting with the current 224 * scope. We don't want to add anything new to the namespace here, 225 * however, so we use MODE_EXECUTE. 226 * Allow searching of the parent tree, but don't open a new scope - 227 * we just want to lookup the object (must be mode EXECUTE to perform 228 * the upsearch) 229 */ 230 status = acpi_ns_lookup(walk_state->scope_info, path, 231 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 232 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, 233 NULL, &node); 234 235 /* 236 * If this name is a control method invocation, we must 237 * setup the method call 238 */ 239 if (ACPI_SUCCESS(status) && 240 possible_method_call && (node->type == ACPI_TYPE_METHOD)) { 241 if ((GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 242 ARGP_SUPERNAME) 243 || (GET_CURRENT_ARG_TYPE(walk_state->arg_types) == 244 ARGP_TARGET)) { 245 /* 246 * acpi_ps_get_next_namestring has increased the AML pointer past 247 * the method invocation namestring, so we need to restore the 248 * saved AML pointer back to the original method invocation 249 * namestring. 250 */ 251 walk_state->parser_state.aml = start; 252 walk_state->arg_count = 1; 253 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 254 } 255 256 /* This name is actually a control method invocation */ 257 258 method_desc = acpi_ns_get_attached_object(node); 259 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 260 "Control Method invocation %4.4s - %p Desc %p Path=%p\n", 261 node->name.ascii, node, method_desc, path)); 262 263 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, start); 264 if (!name_op) { 265 return_ACPI_STATUS(AE_NO_MEMORY); 266 } 267 268 /* Change Arg into a METHOD CALL and attach name to it */ 269 270 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); 271 name_op->common.value.name = path; 272 273 /* Point METHODCALL/NAME to the METHOD Node */ 274 275 name_op->common.node = node; 276 acpi_ps_append_arg(arg, name_op); 277 278 if (!method_desc) { 279 ACPI_ERROR((AE_INFO, 280 "Control Method %p has no attached object", 281 node)); 282 return_ACPI_STATUS(AE_AML_INTERNAL); 283 } 284 285 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 286 "Control Method - %p Args %X\n", 287 node, method_desc->method.param_count)); 288 289 /* Get the number of arguments to expect */ 290 291 walk_state->arg_count = method_desc->method.param_count; 292 return_ACPI_STATUS(AE_OK); 293 } 294 295 /* 296 * Special handling if the name was not found during the lookup - 297 * some not_found cases are allowed 298 */ 299 if (status == AE_NOT_FOUND) { 300 301 /* 1) not_found is ok during load pass 1/2 (allow forward references) */ 302 303 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) != 304 ACPI_PARSE_EXECUTE) { 305 status = AE_OK; 306 } 307 308 /* 2) not_found during a cond_ref_of(x) is ok by definition */ 309 310 else if (walk_state->op->common.aml_opcode == 311 AML_CONDITIONAL_REF_OF_OP) { 312 status = AE_OK; 313 } 314 315 /* 316 * 3) not_found while building a Package is ok at this point, we 317 * may flag as an error later if slack mode is not enabled. 318 * (Some ASL code depends on allowing this behavior) 319 */ 320 else if ((arg->common.parent) && 321 ((arg->common.parent->common.aml_opcode == 322 AML_PACKAGE_OP) 323 || (arg->common.parent->common.aml_opcode == 324 AML_VARIABLE_PACKAGE_OP))) { 325 status = AE_OK; 326 } 327 } 328 329 /* Final exception check (may have been changed from code above) */ 330 331 if (ACPI_FAILURE(status)) { 332 ACPI_ERROR_NAMESPACE(walk_state->scope_info, path, status); 333 334 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == 335 ACPI_PARSE_EXECUTE) { 336 337 /* Report a control method execution error */ 338 339 status = acpi_ds_method_error(status, walk_state); 340 } 341 } 342 343 /* Save the namepath */ 344 345 arg->common.value.name = path; 346 return_ACPI_STATUS(status); 347} 348 349/******************************************************************************* 350 * 351 * FUNCTION: acpi_ps_get_next_simple_arg 352 * 353 * PARAMETERS: parser_state - Current parser state object 354 * arg_type - The argument type (AML_*_ARG) 355 * arg - Where the argument is returned 356 * 357 * RETURN: None 358 * 359 * DESCRIPTION: Get the next simple argument (constant, string, or namestring) 360 * 361 ******************************************************************************/ 362 363void 364acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, 365 u32 arg_type, union acpi_parse_object *arg) 366{ 367 u32 length; 368 u16 opcode; 369 u8 *aml = parser_state->aml; 370 371 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type); 372 373 switch (arg_type) { 374 case ARGP_BYTEDATA: 375 376 /* Get 1 byte from the AML stream */ 377 378 opcode = AML_BYTE_OP; 379 arg->common.value.integer = (u64) *aml; 380 length = 1; 381 break; 382 383 case ARGP_WORDDATA: 384 385 /* Get 2 bytes from the AML stream */ 386 387 opcode = AML_WORD_OP; 388 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml); 389 length = 2; 390 break; 391 392 case ARGP_DWORDDATA: 393 394 /* Get 4 bytes from the AML stream */ 395 396 opcode = AML_DWORD_OP; 397 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml); 398 length = 4; 399 break; 400 401 case ARGP_QWORDDATA: 402 403 /* Get 8 bytes from the AML stream */ 404 405 opcode = AML_QWORD_OP; 406 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml); 407 length = 8; 408 break; 409 410 case ARGP_CHARLIST: 411 412 /* Get a pointer to the string, point past the string */ 413 414 opcode = AML_STRING_OP; 415 arg->common.value.string = ACPI_CAST_PTR(char, aml); 416 417 /* Find the null terminator */ 418 419 length = 0; 420 while (aml[length]) { 421 length++; 422 } 423 length++; 424 break; 425 426 case ARGP_NAME: 427 case ARGP_NAMESTRING: 428 429 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); 430 arg->common.value.name = 431 acpi_ps_get_next_namestring(parser_state); 432 return_VOID; 433 434 default: 435 436 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type)); 437 return_VOID; 438 } 439 440 acpi_ps_init_op(arg, opcode); 441 parser_state->aml += length; 442 return_VOID; 443} 444 445/******************************************************************************* 446 * 447 * FUNCTION: acpi_ps_get_next_field 448 * 449 * PARAMETERS: parser_state - Current parser state object 450 * 451 * RETURN: A newly allocated FIELD op 452 * 453 * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) 454 * 455 ******************************************************************************/ 456 457static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state 458 *parser_state) 459{ 460 u8 *aml; 461 union acpi_parse_object *field; 462 union acpi_parse_object *arg = NULL; 463 u16 opcode; 464 u32 name; 465 u8 access_type; 466 u8 access_attribute; 467 u8 access_length; 468 u32 pkg_length; 469 u8 *pkg_end; 470 u32 buffer_length; 471 472 ACPI_FUNCTION_TRACE(ps_get_next_field); 473 474 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 475 aml = parser_state->aml; 476 477 /* Determine field type */ 478 479 switch (ACPI_GET8(parser_state->aml)) { 480 case AML_FIELD_OFFSET_OP: 481 482 opcode = AML_INT_RESERVEDFIELD_OP; 483 parser_state->aml++; 484 break; 485 486 case AML_FIELD_ACCESS_OP: 487 488 opcode = AML_INT_ACCESSFIELD_OP; 489 parser_state->aml++; 490 break; 491 492 case AML_FIELD_CONNECTION_OP: 493 494 opcode = AML_INT_CONNECTION_OP; 495 parser_state->aml++; 496 break; 497 498 case AML_FIELD_EXT_ACCESS_OP: 499 500 opcode = AML_INT_EXTACCESSFIELD_OP; 501 parser_state->aml++; 502 break; 503 504 default: 505 506 opcode = AML_INT_NAMEDFIELD_OP; 507 break; 508 } 509 510 /* Allocate a new field op */ 511 512 field = acpi_ps_alloc_op(opcode, aml); 513 if (!field) { 514 return_PTR(NULL); 515 } 516 517 /* Decode the field type */ 518 519 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 520 switch (opcode) { 521 case AML_INT_NAMEDFIELD_OP: 522 523 /* Get the 4-character name */ 524 525 ACPI_MOVE_32_TO_32(&name, parser_state->aml); 526 acpi_ps_set_name(field, name); 527 parser_state->aml += ACPI_NAMESEG_SIZE; 528 529 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 530 531#ifdef ACPI_ASL_COMPILER 532 /* 533 * Because the package length isn't represented as a parse tree object, 534 * take comments surrounding this and add to the previously created 535 * parse node. 536 */ 537 if (field->common.inline_comment) { 538 field->common.name_comment = 539 field->common.inline_comment; 540 } 541 field->common.inline_comment = acpi_gbl_current_inline_comment; 542 acpi_gbl_current_inline_comment = NULL; 543#endif 544 545 /* Get the length which is encoded as a package length */ 546 547 field->common.value.size = 548 acpi_ps_get_next_package_length(parser_state); 549 break; 550 551 case AML_INT_RESERVEDFIELD_OP: 552 553 /* Get the length which is encoded as a package length */ 554 555 field->common.value.size = 556 acpi_ps_get_next_package_length(parser_state); 557 break; 558 559 case AML_INT_ACCESSFIELD_OP: 560 case AML_INT_EXTACCESSFIELD_OP: 561 562 /* 563 * Get access_type and access_attrib and merge into the field Op 564 * access_type is first operand, access_attribute is second. stuff 565 * these bytes into the node integer value for convenience. 566 */ 567 568 /* Get the two bytes (Type/Attribute) */ 569 570 access_type = ACPI_GET8(parser_state->aml); 571 parser_state->aml++; 572 access_attribute = ACPI_GET8(parser_state->aml); 573 parser_state->aml++; 574 575 field->common.value.integer = (u8)access_type; 576 field->common.value.integer |= (u16)(access_attribute << 8); 577 578 /* This opcode has a third byte, access_length */ 579 580 if (opcode == AML_INT_EXTACCESSFIELD_OP) { 581 access_length = ACPI_GET8(parser_state->aml); 582 parser_state->aml++; 583 584 field->common.value.integer |= 585 (u32)(access_length << 16); 586 } 587 break; 588 589 case AML_INT_CONNECTION_OP: 590 591 /* 592 * Argument for Connection operator can be either a Buffer 593 * (resource descriptor), or a name_string. 594 */ 595 aml = parser_state->aml; 596 if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) { 597 parser_state->aml++; 598 599 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 600 pkg_end = parser_state->aml; 601 pkg_length = 602 acpi_ps_get_next_package_length(parser_state); 603 pkg_end += pkg_length; 604 605 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 606 if (parser_state->aml < pkg_end) { 607 608 /* Non-empty list */ 609 610 arg = 611 acpi_ps_alloc_op(AML_INT_BYTELIST_OP, aml); 612 if (!arg) { 613 acpi_ps_free_op(field); 614 return_PTR(NULL); 615 } 616 617 /* Get the actual buffer length argument */ 618 619 opcode = ACPI_GET8(parser_state->aml); 620 parser_state->aml++; 621 622 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 623 switch (opcode) { 624 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */ 625 626 buffer_length = 627 ACPI_GET8(parser_state->aml); 628 parser_state->aml += 1; 629 break; 630 631 case AML_WORD_OP: /* AML_WORDDATA_ARG */ 632 633 buffer_length = 634 ACPI_GET16(parser_state->aml); 635 parser_state->aml += 2; 636 break; 637 638 case AML_DWORD_OP: /* AML_DWORDATA_ARG */ 639 640 buffer_length = 641 ACPI_GET32(parser_state->aml); 642 parser_state->aml += 4; 643 break; 644 645 default: 646 647 buffer_length = 0; 648 break; 649 } 650 651 /* Fill in bytelist data */ 652 653 ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state); 654 arg->named.value.size = buffer_length; 655 arg->named.data = parser_state->aml; 656 } 657 658 /* Skip to End of byte data */ 659 660 parser_state->aml = pkg_end; 661 } else { 662 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, aml); 663 if (!arg) { 664 acpi_ps_free_op(field); 665 return_PTR(NULL); 666 } 667 668 /* Get the Namestring argument */ 669 670 arg->common.value.name = 671 acpi_ps_get_next_namestring(parser_state); 672 } 673 674 /* Link the buffer/namestring to parent (CONNECTION_OP) */ 675 676 acpi_ps_append_arg(field, arg); 677 break; 678 679 default: 680 681 /* Opcode was set in previous switch */ 682 break; 683 } 684 685 return_PTR(field); 686} 687 688/******************************************************************************* 689 * 690 * FUNCTION: acpi_ps_free_field_list 691 * 692 * PARAMETERS: start - First Op in field list 693 * 694 * RETURN: None. 695 * 696 * DESCRIPTION: Free all Op objects inside a field list. 697 * 698 ******************************************************************************/ 699 700static void acpi_ps_free_field_list(union acpi_parse_object *start) 701{ 702 union acpi_parse_object *cur = start; 703 union acpi_parse_object *next; 704 union acpi_parse_object *arg; 705 706 while (cur) { 707 next = cur->common.next; 708 709 /* AML_INT_CONNECTION_OP can have a single argument */ 710 711 arg = acpi_ps_get_arg(cur, 0); 712 if (arg) { 713 acpi_ps_free_op(arg); 714 } 715 716 acpi_ps_free_op(cur); 717 cur = next; 718 } 719} 720 721/******************************************************************************* 722 * 723 * FUNCTION: acpi_ps_get_next_arg 724 * 725 * PARAMETERS: walk_state - Current state 726 * parser_state - Current parser state object 727 * arg_type - The argument type (AML_*_ARG) 728 * return_arg - Where the next arg is returned 729 * 730 * RETURN: Status, and an op object containing the next argument. 731 * 732 * DESCRIPTION: Get next argument (including complex list arguments that require 733 * pushing the parser stack) 734 * 735 ******************************************************************************/ 736 737acpi_status 738acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, 739 struct acpi_parse_state *parser_state, 740 u32 arg_type, union acpi_parse_object **return_arg) 741{ 742 union acpi_parse_object *arg = NULL; 743 union acpi_parse_object *prev = NULL; 744 union acpi_parse_object *field; 745 u32 subop; 746 acpi_status status = AE_OK; 747 748 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state); 749 750 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 751 "Expected argument type ARGP: %s (%2.2X)\n", 752 acpi_ut_get_argument_type_name(arg_type), arg_type)); 753 754 switch (arg_type) { 755 case ARGP_BYTEDATA: 756 case ARGP_WORDDATA: 757 case ARGP_DWORDDATA: 758 case ARGP_CHARLIST: 759 case ARGP_NAME: 760 case ARGP_NAMESTRING: 761 762 /* Constants, strings, and namestrings are all the same size */ 763 764 arg = acpi_ps_alloc_op(AML_BYTE_OP, parser_state->aml); 765 if (!arg) { 766 return_ACPI_STATUS(AE_NO_MEMORY); 767 } 768 769 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); 770 break; 771 772 case ARGP_PKGLENGTH: 773 774 /* Package length, nothing returned */ 775 776 parser_state->pkg_end = 777 acpi_ps_get_next_package_end(parser_state); 778 break; 779 780 case ARGP_FIELDLIST: 781 782 if (parser_state->aml < parser_state->pkg_end) { 783 784 /* Non-empty list */ 785 786 while (parser_state->aml < parser_state->pkg_end) { 787 field = acpi_ps_get_next_field(parser_state); 788 if (!field) { 789 if (arg) { 790 acpi_ps_free_field_list(arg); 791 } 792 793 return_ACPI_STATUS(AE_NO_MEMORY); 794 } 795 796 if (prev) { 797 prev->common.next = field; 798 } else { 799 arg = field; 800 } 801 prev = field; 802 } 803 804 /* Skip to End of byte data */ 805 806 parser_state->aml = parser_state->pkg_end; 807 } 808 break; 809 810 case ARGP_BYTELIST: 811 812 if (parser_state->aml < parser_state->pkg_end) { 813 814 /* Non-empty list */ 815 816 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP, 817 parser_state->aml); 818 if (!arg) { 819 return_ACPI_STATUS(AE_NO_MEMORY); 820 } 821 822 /* Fill in bytelist data */ 823 824 arg->common.value.size = (u32) 825 ACPI_PTR_DIFF(parser_state->pkg_end, 826 parser_state->aml); 827 arg->named.data = parser_state->aml; 828 829 /* Skip to End of byte data */ 830 831 parser_state->aml = parser_state->pkg_end; 832 } 833 break; 834 835 case ARGP_SIMPLENAME: 836 case ARGP_NAME_OR_REF: 837 838 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 839 "**** SimpleName/NameOrRef: %s (%2.2X)\n", 840 acpi_ut_get_argument_type_name(arg_type), 841 arg_type)); 842 843 subop = acpi_ps_peek_opcode(parser_state); 844 if (subop == 0 || 845 acpi_ps_is_leading_char(subop) || 846 ACPI_IS_ROOT_PREFIX(subop) || 847 ACPI_IS_PARENT_PREFIX(subop)) { 848 849 /* null_name or name_string */ 850 851 arg = 852 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 853 parser_state->aml); 854 if (!arg) { 855 return_ACPI_STATUS(AE_NO_MEMORY); 856 } 857 858 status = 859 acpi_ps_get_next_namepath(walk_state, parser_state, 860 arg, 861 ACPI_NOT_METHOD_CALL); 862 if (ACPI_FAILURE(status)) { 863 acpi_ps_free_op(arg); 864 return_ACPI_STATUS(status); 865 } 866 } else { 867 /* Single complex argument, nothing returned */ 868 869 walk_state->arg_count = 1; 870 } 871 break; 872 873 case ARGP_TARGET: 874 case ARGP_SUPERNAME: 875 876 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 877 "**** Target/Supername: %s (%2.2X)\n", 878 acpi_ut_get_argument_type_name(arg_type), 879 arg_type)); 880 881 subop = acpi_ps_peek_opcode(parser_state); 882 if (subop == 0 || 883 acpi_ps_is_leading_char(subop) || 884 ACPI_IS_ROOT_PREFIX(subop) || 885 ACPI_IS_PARENT_PREFIX(subop)) { 886 887 /* NULL target (zero). Convert to a NULL namepath */ 888 889 arg = 890 acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, 891 parser_state->aml); 892 if (!arg) { 893 return_ACPI_STATUS(AE_NO_MEMORY); 894 } 895 896 status = 897 acpi_ps_get_next_namepath(walk_state, parser_state, 898 arg, 899 ACPI_POSSIBLE_METHOD_CALL); 900 if (ACPI_FAILURE(status)) { 901 acpi_ps_free_op(arg); 902 return_ACPI_STATUS(status); 903 } 904 905 if (arg->common.aml_opcode == AML_INT_METHODCALL_OP) { 906 907 /* Free method call op and corresponding namestring sub-ob */ 908 909 acpi_ps_free_op(arg->common.value.arg); 910 acpi_ps_free_op(arg); 911 arg = NULL; 912 walk_state->arg_count = 1; 913 } 914 } else { 915 /* Single complex argument, nothing returned */ 916 917 walk_state->arg_count = 1; 918 } 919 break; 920 921 case ARGP_DATAOBJ: 922 case ARGP_TERMARG: 923 924 ACPI_DEBUG_PRINT((ACPI_DB_PARSE, 925 "**** TermArg/DataObj: %s (%2.2X)\n", 926 acpi_ut_get_argument_type_name(arg_type), 927 arg_type)); 928 929 /* Single complex argument, nothing returned */ 930 931 walk_state->arg_count = 1; 932 break; 933 934 case ARGP_DATAOBJLIST: 935 case ARGP_TERMLIST: 936 case ARGP_OBJLIST: 937 938 if (parser_state->aml < parser_state->pkg_end) { 939 940 /* Non-empty list of variable arguments, nothing returned */ 941 942 walk_state->arg_count = ACPI_VAR_ARGS; 943 } 944 break; 945 946 default: 947 948 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type)); 949 status = AE_AML_OPERAND_TYPE; 950 break; 951 } 952 953 *return_arg = arg; 954 return_ACPI_STATUS(status); 955}
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