mirror of
https://github.com/reactos/reactos.git
synced 2024-11-20 06:15:26 +00:00
477 lines
13 KiB
C
477 lines
13 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: exnames - interpreter/scanner name load/execute
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2021, 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 MERCHANTABILITY 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_NAMESEG_SIZE * NumNameSegs) + 2 + 1;
|
|
}
|
|
else
|
|
{
|
|
SizeNeeded = PrefixCount + (ACPI_NAMESEG_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);
|
|
}
|
|
|
|
for (Index = 0;
|
|
(Index < ACPI_NAMESEG_SIZE) && (AcpiUtValidNameChar (*AmlAddress, 0));
|
|
Index++)
|
|
{
|
|
CharBuf[Index] = *AmlAddress++;
|
|
}
|
|
|
|
|
|
/* Valid name segment */
|
|
|
|
if (Index == 4)
|
|
{
|
|
/* Found 4 valid characters */
|
|
|
|
CharBuf[4] = '\0';
|
|
|
|
if (NameString)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
|
|
"Appending NameSeg %s\n", CharBuf));
|
|
strcat (NameString, CharBuf);
|
|
}
|
|
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);
|
|
}
|