+++ /dev/null
-/******************************************************************************
- *
- * Module Name: exnames - interpreter/scanner name load/execute
- *
- *****************************************************************************/
-
-/*
- * Copyright (C) 2000 - 2017, 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.
- */
-
-#include "acpi.h"
-#include "accommon.h"
-#include "acinterp.h"
-#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;
- *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) && (AcpiUtValidNameChar (*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)
- {
- 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:
-
- 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);
-}
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