195b482a8SLen Brown 295b482a8SLen Brown /****************************************************************************** 395b482a8SLen Brown * 495b482a8SLen Brown * Module Name: exnames - interpreter/scanner name load/execute 595b482a8SLen Brown * 695b482a8SLen Brown *****************************************************************************/ 795b482a8SLen Brown 895b482a8SLen Brown /* 977848130SBob Moore * Copyright (C) 2000 - 2012, Intel Corp. 1095b482a8SLen Brown * All rights reserved. 1195b482a8SLen Brown * 1295b482a8SLen Brown * Redistribution and use in source and binary forms, with or without 1395b482a8SLen Brown * modification, are permitted provided that the following conditions 1495b482a8SLen Brown * are met: 1595b482a8SLen Brown * 1. Redistributions of source code must retain the above copyright 1695b482a8SLen Brown * notice, this list of conditions, and the following disclaimer, 1795b482a8SLen Brown * without modification. 1895b482a8SLen Brown * 2. Redistributions in binary form must reproduce at minimum a disclaimer 1995b482a8SLen Brown * substantially similar to the "NO WARRANTY" disclaimer below 2095b482a8SLen Brown * ("Disclaimer") and any redistribution must be conditioned upon 2195b482a8SLen Brown * including a substantially similar Disclaimer requirement for further 2295b482a8SLen Brown * binary redistribution. 2395b482a8SLen Brown * 3. Neither the names of the above-listed copyright holders nor the names 2495b482a8SLen Brown * of any contributors may be used to endorse or promote products derived 2595b482a8SLen Brown * from this software without specific prior written permission. 2695b482a8SLen Brown * 2795b482a8SLen Brown * Alternatively, this software may be distributed under the terms of the 2895b482a8SLen Brown * GNU General Public License ("GPL") version 2 as published by the Free 2995b482a8SLen Brown * Software Foundation. 3095b482a8SLen Brown * 3195b482a8SLen Brown * NO WARRANTY 3295b482a8SLen Brown * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3395b482a8SLen Brown * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3495b482a8SLen Brown * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 3595b482a8SLen Brown * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3695b482a8SLen Brown * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3795b482a8SLen Brown * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3895b482a8SLen Brown * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3995b482a8SLen Brown * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4095b482a8SLen Brown * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 4195b482a8SLen Brown * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 4295b482a8SLen Brown * POSSIBILITY OF SUCH DAMAGES. 4395b482a8SLen Brown */ 4495b482a8SLen Brown 4595b482a8SLen Brown #include <acpi/acpi.h> 46e2f7a777SLen Brown #include "accommon.h" 47e2f7a777SLen Brown #include "acinterp.h" 48e2f7a777SLen Brown #include "amlcode.h" 4995b482a8SLen Brown 5095b482a8SLen Brown #define _COMPONENT ACPI_EXECUTER 5195b482a8SLen Brown ACPI_MODULE_NAME("exnames") 5295b482a8SLen Brown 5395b482a8SLen Brown /* Local prototypes */ 5495b482a8SLen Brown static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs); 5595b482a8SLen Brown 56*1f86e8c1SLv Zheng static acpi_status acpi_ex_name_segment(u8 **in_aml_address, char *name_string); 5795b482a8SLen Brown 5895b482a8SLen Brown /******************************************************************************* 5995b482a8SLen Brown * 6095b482a8SLen Brown * FUNCTION: acpi_ex_allocate_name_string 6195b482a8SLen Brown * 6295b482a8SLen Brown * PARAMETERS: prefix_count - Count of parent levels. Special cases: 6395b482a8SLen Brown * (-1)==root, 0==none 6495b482a8SLen Brown * num_name_segs - count of 4-character name segments 6595b482a8SLen Brown * 6695b482a8SLen Brown * RETURN: A pointer to the allocated string segment. This segment must 6795b482a8SLen Brown * be deleted by the caller. 6895b482a8SLen Brown * 6995b482a8SLen Brown * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name 7095b482a8SLen Brown * string is long enough, and set up prefix if any. 7195b482a8SLen Brown * 7295b482a8SLen Brown ******************************************************************************/ 7395b482a8SLen Brown 7495b482a8SLen Brown static char *acpi_ex_allocate_name_string(u32 prefix_count, u32 num_name_segs) 7595b482a8SLen Brown { 7695b482a8SLen Brown char *temp_ptr; 7795b482a8SLen Brown char *name_string; 7895b482a8SLen Brown u32 size_needed; 7995b482a8SLen Brown 8095b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_allocate_name_string); 8195b482a8SLen Brown 8295b482a8SLen Brown /* 8395b482a8SLen Brown * Allow room for all \ and ^ prefixes, all segments and a multi_name_prefix. 8495b482a8SLen Brown * Also, one byte for the null terminator. 8595b482a8SLen Brown * This may actually be somewhat longer than needed. 8695b482a8SLen Brown */ 8795b482a8SLen Brown if (prefix_count == ACPI_UINT32_MAX) { 8895b482a8SLen Brown 8995b482a8SLen Brown /* Special case for root */ 9095b482a8SLen Brown 9195b482a8SLen Brown size_needed = 1 + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1; 9295b482a8SLen Brown } else { 9395b482a8SLen Brown size_needed = 9495b482a8SLen Brown prefix_count + (ACPI_NAME_SIZE * num_name_segs) + 2 + 1; 9595b482a8SLen Brown } 9695b482a8SLen Brown 9795b482a8SLen Brown /* 9895b482a8SLen Brown * Allocate a buffer for the name. 9995b482a8SLen Brown * This buffer must be deleted by the caller! 10095b482a8SLen Brown */ 10195b482a8SLen Brown name_string = ACPI_ALLOCATE(size_needed); 10295b482a8SLen Brown if (!name_string) { 10395b482a8SLen Brown ACPI_ERROR((AE_INFO, 104f6a22b0bSBob Moore "Could not allocate size %u", size_needed)); 10595b482a8SLen Brown return_PTR(NULL); 10695b482a8SLen Brown } 10795b482a8SLen Brown 10895b482a8SLen Brown temp_ptr = name_string; 10995b482a8SLen Brown 11095b482a8SLen Brown /* Set up Root or Parent prefixes if needed */ 11195b482a8SLen Brown 11295b482a8SLen Brown if (prefix_count == ACPI_UINT32_MAX) { 11395b482a8SLen Brown *temp_ptr++ = AML_ROOT_PREFIX; 11495b482a8SLen Brown } else { 11595b482a8SLen Brown while (prefix_count--) { 11695b482a8SLen Brown *temp_ptr++ = AML_PARENT_PREFIX; 11795b482a8SLen Brown } 11895b482a8SLen Brown } 11995b482a8SLen Brown 12095b482a8SLen Brown /* Set up Dual or Multi prefixes if needed */ 12195b482a8SLen Brown 12295b482a8SLen Brown if (num_name_segs > 2) { 12395b482a8SLen Brown 12495b482a8SLen Brown /* Set up multi prefixes */ 12595b482a8SLen Brown 12695b482a8SLen Brown *temp_ptr++ = AML_MULTI_NAME_PREFIX_OP; 12795b482a8SLen Brown *temp_ptr++ = (char)num_name_segs; 12895b482a8SLen Brown } else if (2 == num_name_segs) { 12995b482a8SLen Brown 13095b482a8SLen Brown /* Set up dual prefixes */ 13195b482a8SLen Brown 13295b482a8SLen Brown *temp_ptr++ = AML_DUAL_NAME_PREFIX; 13395b482a8SLen Brown } 13495b482a8SLen Brown 13595b482a8SLen Brown /* 13695b482a8SLen Brown * Terminate string following prefixes. acpi_ex_name_segment() will 13795b482a8SLen Brown * append the segment(s) 13895b482a8SLen Brown */ 13995b482a8SLen Brown *temp_ptr = 0; 14095b482a8SLen Brown 14195b482a8SLen Brown return_PTR(name_string); 14295b482a8SLen Brown } 14395b482a8SLen Brown 14495b482a8SLen Brown /******************************************************************************* 14595b482a8SLen Brown * 14695b482a8SLen Brown * FUNCTION: acpi_ex_name_segment 14795b482a8SLen Brown * 14895b482a8SLen Brown * PARAMETERS: in_aml_address - Pointer to the name in the AML code 14995b482a8SLen Brown * name_string - Where to return the name. The name is appended 15095b482a8SLen Brown * to any existing string to form a namepath 15195b482a8SLen Brown * 15295b482a8SLen Brown * RETURN: Status 15395b482a8SLen Brown * 15495b482a8SLen Brown * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream 15595b482a8SLen Brown * 15695b482a8SLen Brown ******************************************************************************/ 15795b482a8SLen Brown 15895b482a8SLen Brown static acpi_status acpi_ex_name_segment(u8 ** in_aml_address, char *name_string) 15995b482a8SLen Brown { 16095b482a8SLen Brown char *aml_address = (void *)*in_aml_address; 16195b482a8SLen Brown acpi_status status = AE_OK; 16295b482a8SLen Brown u32 index; 16395b482a8SLen Brown char char_buf[5]; 16495b482a8SLen Brown 16595b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_name_segment); 16695b482a8SLen Brown 16795b482a8SLen Brown /* 16895b482a8SLen Brown * If first character is a digit, then we know that we aren't looking at a 16995b482a8SLen Brown * valid name segment 17095b482a8SLen Brown */ 17195b482a8SLen Brown char_buf[0] = *aml_address; 17295b482a8SLen Brown 17395b482a8SLen Brown if ('0' <= char_buf[0] && char_buf[0] <= '9') { 17495b482a8SLen Brown ACPI_ERROR((AE_INFO, "Invalid leading digit: %c", char_buf[0])); 17595b482a8SLen Brown return_ACPI_STATUS(AE_CTRL_PENDING); 17695b482a8SLen Brown } 17795b482a8SLen Brown 17895b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Bytes from stream:\n")); 17995b482a8SLen Brown 180*1f86e8c1SLv Zheng for (index = 0; 181*1f86e8c1SLv Zheng (index < ACPI_NAME_SIZE) 18295b482a8SLen Brown && (acpi_ut_valid_acpi_char(*aml_address, 0)); index++) { 18395b482a8SLen Brown char_buf[index] = *aml_address++; 18495b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "%c\n", char_buf[index])); 18595b482a8SLen Brown } 18695b482a8SLen Brown 18795b482a8SLen Brown /* Valid name segment */ 18895b482a8SLen Brown 18995b482a8SLen Brown if (index == 4) { 19095b482a8SLen Brown 19195b482a8SLen Brown /* Found 4 valid characters */ 19295b482a8SLen Brown 19395b482a8SLen Brown char_buf[4] = '\0'; 19495b482a8SLen Brown 19595b482a8SLen Brown if (name_string) { 19695b482a8SLen Brown ACPI_STRCAT(name_string, char_buf); 19795b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_NAMES, 19895b482a8SLen Brown "Appended to - %s\n", name_string)); 19995b482a8SLen Brown } else { 20095b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_NAMES, 20195b482a8SLen Brown "No Name string - %s\n", char_buf)); 20295b482a8SLen Brown } 20395b482a8SLen Brown } else if (index == 0) { 20495b482a8SLen Brown /* 20595b482a8SLen Brown * First character was not a valid name character, 20695b482a8SLen Brown * so we are looking at something other than a name. 20795b482a8SLen Brown */ 20895b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_INFO, 20995b482a8SLen Brown "Leading character is not alpha: %02Xh (not a name)\n", 21095b482a8SLen Brown char_buf[0])); 21195b482a8SLen Brown status = AE_CTRL_PENDING; 21295b482a8SLen Brown } else { 21395b482a8SLen Brown /* 21495b482a8SLen Brown * Segment started with one or more valid characters, but fewer than 21595b482a8SLen Brown * the required 4 21695b482a8SLen Brown */ 21795b482a8SLen Brown status = AE_AML_BAD_NAME; 21895b482a8SLen Brown ACPI_ERROR((AE_INFO, 219f6a22b0bSBob Moore "Bad character 0x%02x in name, at %p", 22095b482a8SLen Brown *aml_address, aml_address)); 22195b482a8SLen Brown } 22295b482a8SLen Brown 22395b482a8SLen Brown *in_aml_address = ACPI_CAST_PTR(u8, aml_address); 22495b482a8SLen Brown return_ACPI_STATUS(status); 22595b482a8SLen Brown } 22695b482a8SLen Brown 22795b482a8SLen Brown /******************************************************************************* 22895b482a8SLen Brown * 22995b482a8SLen Brown * FUNCTION: acpi_ex_get_name_string 23095b482a8SLen Brown * 23195b482a8SLen Brown * PARAMETERS: data_type - Object type to be associated with this 23295b482a8SLen Brown * name 23395b482a8SLen Brown * in_aml_address - Pointer to the namestring in the AML code 23495b482a8SLen Brown * out_name_string - Where the namestring is returned 23595b482a8SLen Brown * out_name_length - Length of the returned string 23695b482a8SLen Brown * 23795b482a8SLen Brown * RETURN: Status, namestring and length 23895b482a8SLen Brown * 23995b482a8SLen Brown * DESCRIPTION: Extract a full namepath from the AML byte stream, 24095b482a8SLen Brown * including any prefixes. 24195b482a8SLen Brown * 24295b482a8SLen Brown ******************************************************************************/ 24395b482a8SLen Brown 24495b482a8SLen Brown acpi_status 24595b482a8SLen Brown acpi_ex_get_name_string(acpi_object_type data_type, 24695b482a8SLen Brown u8 * in_aml_address, 24795b482a8SLen Brown char **out_name_string, u32 * out_name_length) 24895b482a8SLen Brown { 24995b482a8SLen Brown acpi_status status = AE_OK; 25095b482a8SLen Brown u8 *aml_address = in_aml_address; 25195b482a8SLen Brown char *name_string = NULL; 25295b482a8SLen Brown u32 num_segments; 25395b482a8SLen Brown u32 prefix_count = 0; 25495b482a8SLen Brown u8 has_prefix = FALSE; 25595b482a8SLen Brown 25695b482a8SLen Brown ACPI_FUNCTION_TRACE_PTR(ex_get_name_string, aml_address); 25795b482a8SLen Brown 25895b482a8SLen Brown if (ACPI_TYPE_LOCAL_REGION_FIELD == data_type || 25995b482a8SLen Brown ACPI_TYPE_LOCAL_BANK_FIELD == data_type || 26095b482a8SLen Brown ACPI_TYPE_LOCAL_INDEX_FIELD == data_type) { 26195b482a8SLen Brown 26295b482a8SLen Brown /* Disallow prefixes for types associated with field_unit names */ 26395b482a8SLen Brown 26495b482a8SLen Brown name_string = acpi_ex_allocate_name_string(0, 1); 26595b482a8SLen Brown if (!name_string) { 26695b482a8SLen Brown status = AE_NO_MEMORY; 26795b482a8SLen Brown } else { 26895b482a8SLen Brown status = 26995b482a8SLen Brown acpi_ex_name_segment(&aml_address, name_string); 27095b482a8SLen Brown } 27195b482a8SLen Brown } else { 27295b482a8SLen Brown /* 27395b482a8SLen Brown * data_type is not a field name. 27495b482a8SLen Brown * Examine first character of name for root or parent prefix operators 27595b482a8SLen Brown */ 27695b482a8SLen Brown switch (*aml_address) { 27795b482a8SLen Brown case AML_ROOT_PREFIX: 27895b482a8SLen Brown 27995b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, 28095b482a8SLen Brown "RootPrefix(\\) at %p\n", 28195b482a8SLen Brown aml_address)); 28295b482a8SLen Brown 28395b482a8SLen Brown /* 28495b482a8SLen Brown * Remember that we have a root_prefix -- 28595b482a8SLen Brown * see comment in acpi_ex_allocate_name_string() 28695b482a8SLen Brown */ 28795b482a8SLen Brown aml_address++; 28895b482a8SLen Brown prefix_count = ACPI_UINT32_MAX; 28995b482a8SLen Brown has_prefix = TRUE; 29095b482a8SLen Brown break; 29195b482a8SLen Brown 29295b482a8SLen Brown case AML_PARENT_PREFIX: 29395b482a8SLen Brown 29495b482a8SLen Brown /* Increment past possibly multiple parent prefixes */ 29595b482a8SLen Brown 29695b482a8SLen Brown do { 29795b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, 29895b482a8SLen Brown "ParentPrefix (^) at %p\n", 29995b482a8SLen Brown aml_address)); 30095b482a8SLen Brown 30195b482a8SLen Brown aml_address++; 30295b482a8SLen Brown prefix_count++; 30395b482a8SLen Brown 30495b482a8SLen Brown } while (*aml_address == AML_PARENT_PREFIX); 30595b482a8SLen Brown 30695b482a8SLen Brown has_prefix = TRUE; 30795b482a8SLen Brown break; 30895b482a8SLen Brown 30995b482a8SLen Brown default: 31095b482a8SLen Brown 31195b482a8SLen Brown /* Not a prefix character */ 31295b482a8SLen Brown 31395b482a8SLen Brown break; 31495b482a8SLen Brown } 31595b482a8SLen Brown 31695b482a8SLen Brown /* Examine first character of name for name segment prefix operator */ 31795b482a8SLen Brown 31895b482a8SLen Brown switch (*aml_address) { 31995b482a8SLen Brown case AML_DUAL_NAME_PREFIX: 32095b482a8SLen Brown 32195b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, 32295b482a8SLen Brown "DualNamePrefix at %p\n", 32395b482a8SLen Brown aml_address)); 32495b482a8SLen Brown 32595b482a8SLen Brown aml_address++; 32695b482a8SLen Brown name_string = 32795b482a8SLen Brown acpi_ex_allocate_name_string(prefix_count, 2); 32895b482a8SLen Brown if (!name_string) { 32995b482a8SLen Brown status = AE_NO_MEMORY; 33095b482a8SLen Brown break; 33195b482a8SLen Brown } 33295b482a8SLen Brown 33395b482a8SLen Brown /* Indicate that we processed a prefix */ 33495b482a8SLen Brown 33595b482a8SLen Brown has_prefix = TRUE; 33695b482a8SLen Brown 33795b482a8SLen Brown status = 33895b482a8SLen Brown acpi_ex_name_segment(&aml_address, name_string); 33995b482a8SLen Brown if (ACPI_SUCCESS(status)) { 34095b482a8SLen Brown status = 34195b482a8SLen Brown acpi_ex_name_segment(&aml_address, 34295b482a8SLen Brown name_string); 34395b482a8SLen Brown } 34495b482a8SLen Brown break; 34595b482a8SLen Brown 34695b482a8SLen Brown case AML_MULTI_NAME_PREFIX_OP: 34795b482a8SLen Brown 34895b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_LOAD, 34995b482a8SLen Brown "MultiNamePrefix at %p\n", 35095b482a8SLen Brown aml_address)); 35195b482a8SLen Brown 35295b482a8SLen Brown /* Fetch count of segments remaining in name path */ 35395b482a8SLen Brown 35495b482a8SLen Brown aml_address++; 35595b482a8SLen Brown num_segments = *aml_address; 35695b482a8SLen Brown 35795b482a8SLen Brown name_string = 35895b482a8SLen Brown acpi_ex_allocate_name_string(prefix_count, 35995b482a8SLen Brown num_segments); 36095b482a8SLen Brown if (!name_string) { 36195b482a8SLen Brown status = AE_NO_MEMORY; 36295b482a8SLen Brown break; 36395b482a8SLen Brown } 36495b482a8SLen Brown 36595b482a8SLen Brown /* Indicate that we processed a prefix */ 36695b482a8SLen Brown 36795b482a8SLen Brown aml_address++; 36895b482a8SLen Brown has_prefix = TRUE; 36995b482a8SLen Brown 37095b482a8SLen Brown while (num_segments && 37195b482a8SLen Brown (status = 37295b482a8SLen Brown acpi_ex_name_segment(&aml_address, 37395b482a8SLen Brown name_string)) == AE_OK) { 37495b482a8SLen Brown num_segments--; 37595b482a8SLen Brown } 37695b482a8SLen Brown 37795b482a8SLen Brown break; 37895b482a8SLen Brown 37995b482a8SLen Brown case 0: 38095b482a8SLen Brown 38195b482a8SLen Brown /* null_name valid as of 8-12-98 ASL/AML Grammar Update */ 38295b482a8SLen Brown 38395b482a8SLen Brown if (prefix_count == ACPI_UINT32_MAX) { 38495b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 38595b482a8SLen Brown "NameSeg is \"\\\" followed by NULL\n")); 38695b482a8SLen Brown } 38795b482a8SLen Brown 38895b482a8SLen Brown /* Consume the NULL byte */ 38995b482a8SLen Brown 39095b482a8SLen Brown aml_address++; 39195b482a8SLen Brown name_string = 39295b482a8SLen Brown acpi_ex_allocate_name_string(prefix_count, 0); 39395b482a8SLen Brown if (!name_string) { 39495b482a8SLen Brown status = AE_NO_MEMORY; 39595b482a8SLen Brown break; 39695b482a8SLen Brown } 39795b482a8SLen Brown 39895b482a8SLen Brown break; 39995b482a8SLen Brown 40095b482a8SLen Brown default: 40195b482a8SLen Brown 40295b482a8SLen Brown /* Name segment string */ 40395b482a8SLen Brown 40495b482a8SLen Brown name_string = 40595b482a8SLen Brown acpi_ex_allocate_name_string(prefix_count, 1); 40695b482a8SLen Brown if (!name_string) { 40795b482a8SLen Brown status = AE_NO_MEMORY; 40895b482a8SLen Brown break; 40995b482a8SLen Brown } 41095b482a8SLen Brown 41195b482a8SLen Brown status = 41295b482a8SLen Brown acpi_ex_name_segment(&aml_address, name_string); 41395b482a8SLen Brown break; 41495b482a8SLen Brown } 41595b482a8SLen Brown } 41695b482a8SLen Brown 41795b482a8SLen Brown if (AE_CTRL_PENDING == status && has_prefix) { 41895b482a8SLen Brown 41995b482a8SLen Brown /* Ran out of segments after processing a prefix */ 42095b482a8SLen Brown 42195b482a8SLen Brown ACPI_ERROR((AE_INFO, "Malformed Name at %p", name_string)); 42295b482a8SLen Brown status = AE_AML_BAD_NAME; 42395b482a8SLen Brown } 42495b482a8SLen Brown 42595b482a8SLen Brown if (ACPI_FAILURE(status)) { 42695b482a8SLen Brown if (name_string) { 42795b482a8SLen Brown ACPI_FREE(name_string); 42895b482a8SLen Brown } 42995b482a8SLen Brown return_ACPI_STATUS(status); 43095b482a8SLen Brown } 43195b482a8SLen Brown 43295b482a8SLen Brown *out_name_string = name_string; 43395b482a8SLen Brown *out_name_length = (u32) (aml_address - in_aml_address); 43495b482a8SLen Brown 43595b482a8SLen Brown return_ACPI_STATUS(status); 43695b482a8SLen Brown } 437