diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/executer/exnames.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/executer/exnames.c | 480 |
1 files changed, 480 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/executer/exnames.c b/sys/contrib/dev/acpica/components/executer/exnames.c new file mode 100644 index 0000000..9c11e7f --- /dev/null +++ b/sys/contrib/dev/acpica/components/executer/exnames.c @@ -0,0 +1,480 @@ +/****************************************************************************** + * + * Module Name: exnames - interpreter/scanner name load/execute + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2013, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#define __EXNAMES_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acinterp.h> +#include <contrib/dev/acpica/include/amlcode.h> + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exnames") + +/* Local prototypes */ + +static char * +AcpiExAllocateNameString ( + UINT32 PrefixCount, + UINT32 NumNameSegs); + +static ACPI_STATUS +AcpiExNameSegment ( + UINT8 **InAmlAddress, + char *NameString); + + +/******************************************************************************* + * + * FUNCTION: AcpiExAllocateNameString + * + * PARAMETERS: PrefixCount - Count of parent levels. Special cases: + * (-1)==root, 0==none + * NumNameSegs - count of 4-character name segments + * + * RETURN: A pointer to the allocated string segment. This segment must + * be deleted by the caller. + * + * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name + * string is long enough, and set up prefix if any. + * + ******************************************************************************/ + +static char * +AcpiExAllocateNameString ( + UINT32 PrefixCount, + UINT32 NumNameSegs) +{ + char *TempPtr; + char *NameString; + UINT32 SizeNeeded; + + ACPI_FUNCTION_TRACE (ExAllocateNameString); + + + /* + * Allow room for all \ and ^ prefixes, all segments and a MultiNamePrefix. + * Also, one byte for the null terminator. + * This may actually be somewhat longer than needed. + */ + if (PrefixCount == ACPI_UINT32_MAX) + { + /* Special case for root */ + + SizeNeeded = 1 + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1; + } + else + { + SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1; + } + + /* + * Allocate a buffer for the name. + * This buffer must be deleted by the caller! + */ + NameString = ACPI_ALLOCATE (SizeNeeded); + if (!NameString) + { + ACPI_ERROR ((AE_INFO, + "Could not allocate size %u", SizeNeeded)); + return_PTR (NULL); + } + + TempPtr = NameString; + + /* Set up Root or Parent prefixes if needed */ + + if (PrefixCount == ACPI_UINT32_MAX) + { + *TempPtr++ = AML_ROOT_PREFIX; + } + else + { + while (PrefixCount--) + { + *TempPtr++ = AML_PARENT_PREFIX; + } + } + + + /* Set up Dual or Multi prefixes if needed */ + + if (NumNameSegs > 2) + { + /* Set up multi prefixes */ + + *TempPtr++ = AML_MULTI_NAME_PREFIX_OP; + *TempPtr++ = (char) NumNameSegs; + } + else if (2 == NumNameSegs) + { + /* Set up dual prefixes */ + + *TempPtr++ = AML_DUAL_NAME_PREFIX; + } + + /* + * Terminate string following prefixes. AcpiExNameSegment() will + * append the segment(s) + */ + *TempPtr = 0; + + return_PTR (NameString); +} + +/******************************************************************************* + * + * FUNCTION: AcpiExNameSegment + * + * PARAMETERS: InAmlAddress - Pointer to the name in the AML code + * NameString - Where to return the name. The name is appended + * to any existing string to form a namepath + * + * RETURN: Status + * + * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream + * + ******************************************************************************/ + +static ACPI_STATUS +AcpiExNameSegment ( + UINT8 **InAmlAddress, + char *NameString) +{ + char *AmlAddress = (void *) *InAmlAddress; + ACPI_STATUS Status = AE_OK; + UINT32 Index; + char CharBuf[5]; + + + ACPI_FUNCTION_TRACE (ExNameSegment); + + + /* + * If first character is a digit, then we know that we aren't looking at a + * valid name segment + */ + CharBuf[0] = *AmlAddress; + + if ('0' <= CharBuf[0] && CharBuf[0] <= '9') + { + ACPI_ERROR ((AE_INFO, "Invalid leading digit: %c", CharBuf[0])); + return_ACPI_STATUS (AE_CTRL_PENDING); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Bytes from stream:\n")); + + for (Index = 0; + (Index < ACPI_NAME_SIZE) && (AcpiUtValidAcpiChar (*AmlAddress, 0)); + Index++) + { + CharBuf[Index] = *AmlAddress++; + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", CharBuf[Index])); + } + + + /* Valid name segment */ + + if (Index == 4) + { + /* Found 4 valid characters */ + + CharBuf[4] = '\0'; + + if (NameString) + { + ACPI_STRCAT (NameString, CharBuf); + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, + "Appended to - %s\n", NameString)); + } + else + { + ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, + "No Name string - %s\n", CharBuf)); + } + } + else if (Index == 0) + { + /* + * First character was not a valid name character, + * so we are looking at something other than a name. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_INFO, + "Leading character is not alpha: %02Xh (not a name)\n", + CharBuf[0])); + Status = AE_CTRL_PENDING; + } + else + { + /* + * Segment started with one or more valid characters, but fewer than + * the required 4 + */ + Status = AE_AML_BAD_NAME; + ACPI_ERROR ((AE_INFO, + "Bad character 0x%02x in name, at %p", + *AmlAddress, AmlAddress)); + } + + *InAmlAddress = ACPI_CAST_PTR (UINT8, AmlAddress); + return_ACPI_STATUS (Status); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiExGetNameString + * + * PARAMETERS: DataType - Object type to be associated with this + * name + * InAmlAddress - Pointer to the namestring in the AML code + * OutNameString - Where the namestring is returned + * OutNameLength - Length of the returned string + * + * RETURN: Status, namestring and length + * + * DESCRIPTION: Extract a full namepath from the AML byte stream, + * including any prefixes. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiExGetNameString ( + ACPI_OBJECT_TYPE DataType, + UINT8 *InAmlAddress, + char **OutNameString, + UINT32 *OutNameLength) +{ + ACPI_STATUS Status = AE_OK; + UINT8 *AmlAddress = InAmlAddress; + char *NameString = NULL; + UINT32 NumSegments; + UINT32 PrefixCount = 0; + BOOLEAN HasPrefix = FALSE; + + + ACPI_FUNCTION_TRACE_PTR (ExGetNameString, AmlAddress); + + + if (ACPI_TYPE_LOCAL_REGION_FIELD == DataType || + ACPI_TYPE_LOCAL_BANK_FIELD == DataType || + ACPI_TYPE_LOCAL_INDEX_FIELD == DataType) + { + /* Disallow prefixes for types associated with FieldUnit names */ + + NameString = AcpiExAllocateNameString (0, 1); + if (!NameString) + { + Status = AE_NO_MEMORY; + } + else + { + Status = AcpiExNameSegment (&AmlAddress, NameString); + } + } + else + { + /* + * DataType is not a field name. + * Examine first character of name for root or parent prefix operators + */ + switch (*AmlAddress) + { + case AML_ROOT_PREFIX: + + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "RootPrefix(\\) at %p\n", + AmlAddress)); + + /* + * Remember that we have a RootPrefix -- + * see comment in AcpiExAllocateNameString() + */ + AmlAddress++; + PrefixCount = ACPI_UINT32_MAX; + HasPrefix = TRUE; + break; + + case AML_PARENT_PREFIX: + + /* Increment past possibly multiple parent prefixes */ + + do + { + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "ParentPrefix (^) at %p\n", + AmlAddress)); + + AmlAddress++; + PrefixCount++; + + } while (*AmlAddress == AML_PARENT_PREFIX); + + HasPrefix = TRUE; + break; + + default: + + /* Not a prefix character */ + + break; + } + + /* Examine first character of name for name segment prefix operator */ + + switch (*AmlAddress) + { + case AML_DUAL_NAME_PREFIX: + + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "DualNamePrefix at %p\n", + AmlAddress)); + + AmlAddress++; + NameString = AcpiExAllocateNameString (PrefixCount, 2); + if (!NameString) + { + Status = AE_NO_MEMORY; + break; + } + + /* Indicate that we processed a prefix */ + + HasPrefix = TRUE; + + Status = AcpiExNameSegment (&AmlAddress, NameString); + if (ACPI_SUCCESS (Status)) + { + Status = AcpiExNameSegment (&AmlAddress, NameString); + } + break; + + case AML_MULTI_NAME_PREFIX_OP: + + ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "MultiNamePrefix at %p\n", + AmlAddress)); + + /* Fetch count of segments remaining in name path */ + + AmlAddress++; + NumSegments = *AmlAddress; + + NameString = AcpiExAllocateNameString (PrefixCount, NumSegments); + if (!NameString) + { + Status = AE_NO_MEMORY; + break; + } + + /* Indicate that we processed a prefix */ + + AmlAddress++; + HasPrefix = TRUE; + + while (NumSegments && + (Status = AcpiExNameSegment (&AmlAddress, NameString)) == + AE_OK) + { + NumSegments--; + } + + break; + + case 0: + + /* NullName valid as of 8-12-98 ASL/AML Grammar Update */ + + if (PrefixCount == ACPI_UINT32_MAX) + { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, + "NameSeg is \"\\\" followed by NULL\n")); + } + + /* Consume the NULL byte */ + + AmlAddress++; + NameString = AcpiExAllocateNameString (PrefixCount, 0); + if (!NameString) + { + Status = AE_NO_MEMORY; + break; + } + + break; + + default: + + /* Name segment string */ + + NameString = AcpiExAllocateNameString (PrefixCount, 1); + if (!NameString) + { + Status = AE_NO_MEMORY; + break; + } + + Status = AcpiExNameSegment (&AmlAddress, NameString); + break; + } + } + + if (AE_CTRL_PENDING == Status && HasPrefix) + { + /* Ran out of segments after processing a prefix */ + + ACPI_ERROR ((AE_INFO, + "Malformed Name at %p", NameString)); + Status = AE_AML_BAD_NAME; + } + + if (ACPI_FAILURE (Status)) + { + if (NameString) + { + ACPI_FREE (NameString); + } + return_ACPI_STATUS (Status); + } + + *OutNameString = NameString; + *OutNameLength = (UINT32) (AmlAddress - InAmlAddress); + + return_ACPI_STATUS (Status); +} |