acpica/source/components/executer/exnames.c

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/******************************************************************************
*
* Module Name: isnames - interpreter/scanner name load/execute
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
* reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (without the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#define __ISNAMES_C__
#include <acpi.h>
#include <interpreter.h>
#include <amlcode.h>
#include <namespace.h>
#define _THIS_MODULE "isnames.c"
#define _COMPONENT INTERPRETER
#define PKG_Type1 64 /* or 0x40 Max encoding size = 0x3F */
#define PKG_Type2 16384 /* or 0x4000 Max encoding size = 0xFFF */
#define PKG_Type3 4194304 /* or 0x400000 Max encoding size = 0xFFFFF */
#define PKG_Type4 1073741824 /* or 0x40000000 Max encoding size = 0xFFFFFFF */
/*****************************************************************************
*
* FUNCTION: AmlAllocateNameString
*
* PARAMETERS: PrefixCount - Count of parent levels. Special cases:
* -1 => root
* 0 => none
* NumNameSegs - count of 4-character name segments
*
* DESCRIPTION: Ensure allocated name string is long enough,
* and set up prefix if any.
*
****************************************************************************/
char *
AmlAllocateNameString (
INT32 PrefixCount,
INT32 NumNameSegs)
{
char *TempPtr;
char *NameString;
INT32 SizeNeeded;
FUNCTION_TRACE ("AmlAllocateNameString");
/*
* Allow room for all \ and ^ prefixes, all segments, and a MultiNamePrefix.
* This may actually be somewhat longer than needed.
*/
if (PrefixCount < 0)
{
SizeNeeded = 1 /* root */ + 4 * NumNameSegs + 2;
}
else
{
SizeNeeded = PrefixCount + 4 * NumNameSegs + 2;
}
if (SizeNeeded < INITIAL_NAME_BUF_SIZE)
{
SizeNeeded = INITIAL_NAME_BUF_SIZE;
}
NameString = CmAllocate ((ACPI_SIZE) SizeNeeded);
if (!NameString)
{
/* Allocation failure */
REPORT_ERROR ("AmlAllocateNameString: name allocation failure");
FUNCTION_EXIT;
return NULL;
}
TempPtr = NameString;
/* Set up Root or Parent prefixes if needed */
if (PrefixCount < 0)
{
*TempPtr++ = AML_RootPrefix;
}
else
{
while (PrefixCount--)
{
*TempPtr++ = AML_ParentPrefix;
}
}
/* Set up Dual or Multi prefixes if needed */
if (NumNameSegs > 2)
{
/* Set up multi prefixes */
*TempPtr++ = AML_MultiNamePrefixOp;
*TempPtr++ = (char) NumNameSegs;
}
else if (2 == NumNameSegs)
{
/* Set up dual prefixes */
*TempPtr++ = AML_DualNamePrefix;
}
/* Terminate string following prefixes. AmlDoSeg() will append the segment(s) */
*TempPtr = 0;
FUNCTION_EXIT;
return NameString;
}
/*****************************************************************************
*
* FUNCTION: AmlGoodChar
*
* PARAMETERS: Character - The character to be examined
*
* RETURN: 1 if Character may appear in a name, else 0
*
* DESCRIPTION: Check for a printable character
*
****************************************************************************/
INT32
AmlGoodChar (
INT32 Character)
{
return ((Character == '_') || (Character >= 'A' && Character <= 'Z') ||
(Character >= '0' && Character <= '9'));
}
/*****************************************************************************
*
* FUNCTION: AmlDecodePackageLength
*
* PARAMETERS: LastPkgLen - latest value decoded by DoPkgLength() for
* most recently examined package or field
*
* RETURN: Number of bytes contained in package length encoding
*
* DESCRIPTION: Decodes the Package Length. Upper 2 bits are are used to
* tell if type 1, 2, 3, or 4.
* 0x3F = Max 1 byte encoding,
* 0xFFF = Max 2 byte encoding,
* 0xFFFFF = Max 3 Byte encoding,
* 0xFFFFFFFFF = Max 4 Byte encoding.
*
****************************************************************************/
INT32
AmlDecodePackageLength (
INT32 LastPkgLen)
{
INT32 NumBytes = 0;
FUNCTION_TRACE ("AmlDecodePackageLength");
if (LastPkgLen < PKG_Type1)
NumBytes = 1;
else if (LastPkgLen < PKG_Type2)
NumBytes = 2;
else if (LastPkgLen < PKG_Type3)
NumBytes = 3;
else if (LastPkgLen < PKG_Type4)
NumBytes = 4;
FUNCTION_EXIT;
return NumBytes;
}
/*****************************************************************************
*
* FUNCTION: AmlDoSeg
*
* PARAMETERS: LoadExecMode - MODE_Load or MODE_Exec
*
* RETURN: Status
*
* DESCRIPTION: Print/exec a name segment (4 bytes)
*
****************************************************************************/
ACPI_STATUS
AmlDoSeg (
char *NameString,
OPERATING_MODE LoadExecMode)
{
ACPI_STATUS Status = AE_OK;
INT32 Index;
char CharBuf[5];
FUNCTION_TRACE ("AmlDoSeg");
/* If first character is a digit, we aren't looking at a valid name segment */
CharBuf[0] = AmlPeek ();
if ('0' <= CharBuf[0] && CharBuf[0] <= '9')
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoSeg: leading digit: %c\n", CharBuf[0]));
Status = AE_PENDING;
}
else
{
DEBUG_PRINT (TRACE_LOAD, ("AmlDoSeg: Bytes from stream:\n"));
for (Index = 4; Index > 0 && AmlGoodChar (AmlPeek ()); --Index)
{
AmlConsumeStreamBytes (1, (UINT8 *) &CharBuf[4 - Index]);
DEBUG_PRINT (TRACE_LOAD, ("%c\n", CharBuf[4 - Index]));
}
}
if (AE_OK == Status)
{
/* Valid name segment */
if (0 == Index)
{
/* Found 4 valid characters */
CharBuf[4] = '\0';
if (NameString)
{
strcat (NameString, CharBuf);
DEBUG_PRINT (TRACE_NAMES, ("AmlDoSeg: Appended to - %s \n", NameString));
}
else
{
DEBUG_PRINT (TRACE_NAMES, ("AmlDoSeg: No Name string - %s \n", CharBuf));
}
}
else if (4 == Index)
{
/*
* First character was not a valid name character,
* so we are looking at something other than a name.
*/
DEBUG_PRINT (ACPI_INFO, ("AmlDoSeg: Leading char not alpha: %02Xh (not a name)\n", CharBuf[0]));
Status = AE_PENDING;
}
else
{
/* Segment started with one or more valid characters, but fewer than 4 */
Status = AE_AML_ERROR;
DEBUG_PRINT (TRACE_LOAD, ("AmlDoSeg: Bad char %02x in name\n", AmlPeek ()));
if (MODE_Load == LoadExecMode)
{
/* Second pass load mode */
REPORT_ERROR ("During LOAD this segment started with one or more valid characters, but fewer than 4");
}
else
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoSeg: Bad char %02x in name\n", AmlPeek ()));
}
}
}
DEBUG_PRINT (TRACE_EXEC, ("Leave AmlDoSeg %s \n", ExceptionNames[Status]));
FUNCTION_STATUS_EXIT (Status);
return Status;
}
/*****************************************************************************
*
* FUNCTION: AmlDoName
*
* PARAMETERS: DataType - Data type to be associated with this name
* LoadExecMode - MODE_Load or MODE_Exec
*
* RETURN: Status
*
* DESCRIPTION: Print a name, including any prefixes, enter it in the
* name space, and put its handle on the stack.
*
****************************************************************************/
ACPI_STATUS
AmlDoName (
ACPI_OBJECT_TYPE DataType,
OPERATING_MODE LoadExecMode)
{
ACPI_STATUS Status = AE_OK;
INT32 NumSegments;
INT32 PrefixCount = 0;
UINT8 Prefix = 0;
ACPI_HANDLE handle;
INT32 MethodFlags;
INT32 ArgCount;
INT32 StackBeforeArgs;
METHOD_INFO *MethodPtr;
char *NameString = NULL;
FUNCTION_TRACE ("AmlDoName");
BREAKPOINT3;
if (TYPE_DefField == DataType ||
TYPE_BankField == DataType ||
TYPE_IndexField == DataType)
{
/* Disallow prefixes for types associated with field names */
NameString = AmlAllocateNameString (0, 1);
if (!NameString)
{
Status = AE_NO_MEMORY;
}
else
{
Status = AmlDoSeg (NameString, LoadExecMode);
}
}
else
{
/* DataType is not a field name */
switch (AmlPeekOp ())
{
/* Examine first character of name for root or parent prefix operators */
case AML_RootPrefix:
AmlConsumeStreamBytes (1, &Prefix);
DEBUG_PRINT (TRACE_LOAD, ("RootPrefix: %x\n", Prefix));
/*
* Remember that we have a RootPrefix --
* see comment in AmlAllocateNameString()
*/
PrefixCount = -1;
break;
case AML_ParentPrefix:
do
{
AmlConsumeStreamBytes (1, &Prefix);
DEBUG_PRINT (TRACE_LOAD, ("ParentPrefix: %x\n", Prefix));
++PrefixCount;
} while (AmlPeekOp () == AML_ParentPrefix);
break;
default:
break;
}
switch (AmlPeekOp ())
{
/* Examine first character of name for name segment prefix operator */
case AML_DualNamePrefix:
AmlConsumeStreamBytes (1, &Prefix);
DEBUG_PRINT (TRACE_LOAD, ("DualNamePrefix: %x\n", Prefix));
NameString = AmlAllocateNameString (PrefixCount, 2);
if (!NameString)
{
Status = AE_NO_MEMORY;
break;
}
/* Ensure PrefixCount != 0 to remember processing a prefix */
PrefixCount += 2;
if ((Status = AmlDoSeg (NameString, LoadExecMode)) == AE_OK)
{
Status = AmlDoSeg (NameString, LoadExecMode);
}
break;
case AML_MultiNamePrefixOp:
AmlConsumeStreamBytes (1, &Prefix);
DEBUG_PRINT (TRACE_LOAD, ("MultiNamePrefix: %x\n", Prefix));
NumSegments = AmlPeek (); /* fetch count of segments */
if (AmlDoByteConst (MODE_Load, 0) != AE_OK)
{
/* Unexpected end of AML */
REPORT_ERROR ("*UNEXPECTED END* [Name]");
Status = AE_AML_ERROR;
break;
}
NameString = AmlAllocateNameString (PrefixCount, NumSegments);
if (!NameString)
{
Status = AE_NO_MEMORY;
break;
}
/* Ensure PrefixCount != 0 to remember processing a prefix */
PrefixCount += 2;
while (NumSegments && (Status = AmlDoSeg (NameString, LoadExecMode)) == AE_OK)
{
--NumSegments;
}
break;
case 0:
/* NullName valid as of 8-12-98 ASL/AML Grammar Update */
if (-1 == PrefixCount)
{
/* RootPrefix followed by NULL */
DEBUG_PRINT (TRACE_EXEC,
("AmlDoName: NameSeg is \"\\\" followed by NULL\n"));
}
AmlConsumeStreamBytes (1, NULL); /* consume NULL byte */
NameString = AmlAllocateNameString (PrefixCount, 0);
if (!NameString)
{
Status = AE_NO_MEMORY;
break;
}
break;
default:
/* Name segment string */
NameString = AmlAllocateNameString (PrefixCount, 1);
if (!NameString)
{
Status = AE_NO_MEMORY;
break;
}
Status = AmlDoSeg (NameString, LoadExecMode);
break;
} /* Switch (PeekOp ()) */
}
if (AE_OK == Status)
{
/* All prefixes have been handled, and the name is in NameString */
LocalDeleteObject ((ACPI_OBJECT_INTERNAL **) &ObjStack[ObjStackTop]);
Status = NsLookup (CurrentScope->Scope, NameString, DataType, LoadExecMode,
NS_SEARCH_PARENT, (NAME_TABLE_ENTRY **) &ObjStack[ObjStackTop]);
/* Help view ObjStack during debugging */
handle = ObjStack[ObjStackTop];
/* TBD: another global to remove!! */
/* Globally set this handle for use later */
if (MODE_Load1 == LoadExecMode)
{
LastMethod = handle;
}
if (MODE_Exec == LoadExecMode && !ObjStack[ObjStackTop])
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoName: Name Lookup Failure\n"));
Status = AE_AML_ERROR;
}
else if (MODE_Load1 != LoadExecMode)
{
/* Not first pass load */
if (TYPE_Any == DataType &&
TYPE_Method == NsGetType (ObjStack[ObjStackTop]))
{
/*
* Method reference call
* The name just looked up is a Method that was already
* defined, so this is a reference (call). Scan the args.
* The arg count is in the MethodFlags, which is the first
* byte of the Method's AML.
*/
MethodPtr = (METHOD_INFO *) NsGetValue (ObjStack[ObjStackTop]);
if (MethodPtr)
{
/* MethodPtr valid */
MethodFlags = AmlGetPCodeByte (MethodPtr->Offset);
if (AML_END_OF_BLOCK == MethodFlags)
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoName: invoked Method %s has no AML\n",
NameString));
Status = AE_AML_ERROR;
}
else
{
/* MethodPtr points at valid method */
ArgCount = (MethodFlags & METHOD_ARG_COUNT_MASK)
>> METHOD_ARG_COUNT_SHIFT;
StackBeforeArgs = ObjStackTop;
if (((Status = AmlObjPushIfExec (MODE_Exec)) == AE_OK) &&
(ArgCount > 0))
{
/* Get all arguments */
while (ArgCount-- && (AE_OK == Status))
{
/* Get each argument */
if (AE_OK == (Status = AmlDoOpCode (LoadExecMode)))
{
/* Argument is now on the object stack */
/*
* Arguments (e.g., local variables and control
* method arguments) passed to control methods
* are values, not references.
*/
/*
* TBD: RefOf problem with AmlGetRvalue() conversion.
*/
if (MODE_Exec == LoadExecMode)
{
Status = AmlGetRvalue ((ACPI_OBJECT_INTERNAL **)
&ObjStack[ObjStackTop]);
}
if (AE_OK == Status)
{
/* Make room for the next argument */
Status = AmlObjPushIfExec (LoadExecMode);
}
}
}
}
if ((AE_OK == Status) && (MODE_Exec == LoadExecMode))
{
/* Execution mode */
/* Mark end of arg list */
LocalDeleteObject ((ACPI_OBJECT_INTERNAL **) &ObjStack[ObjStackTop]);
ObjStack[ObjStackTop] = NULL;
/* Establish Method's scope as current */
NsPushMethodScope ((ACPI_HANDLE) ObjStack[StackBeforeArgs]);
DEBUG_PRINT (TRACE_LOAD,
("Calling %4.4s, StackBeforeArgs %d ObjStackTop %d\n",
ObjStack[StackBeforeArgs], StackBeforeArgs,
ObjStackTop));
AmlDumpObjStack (LoadExecMode, "AmlDoName", ACPI_INT_MAX, "Method Arguments");
/* Execute the Method, passing the stacked args */
Status = AmlExecuteMethod (
MethodPtr->Offset + 1, MethodPtr->Length - 1,
(ACPI_OBJECT_INTERNAL **) &ObjStack[StackBeforeArgs + 1]);
DEBUG_PRINT (TRACE_LOAD,
("AmlExec Status=%s, StackBeforeArgs %d ObjStackTop %d\n",
ExceptionNames[Status], StackBeforeArgs, ObjStackTop));
if (AE_RETURN_VALUE == Status)
{
/* Recover returned value */
if (StackBeforeArgs < ObjStackTop)
{
LocalDeleteObject ((ACPI_OBJECT_INTERNAL **) &ObjStack[StackBeforeArgs]);
ObjStack[StackBeforeArgs] = ObjStack[ObjStackTop];
ObjStackTop--;
}
Status = AE_OK;
}
/* Pop scope stack */
NsPopCurrent (TYPE_Any);
} /* Execution mode */
/* Clean up object stack */
DEBUG_PRINT (TRACE_LOAD,
("AmlDoName: Cleaning up object stack (%d elements)\n",
ObjStackTop - StackBeforeArgs));
while (ObjStackTop > StackBeforeArgs)
{
LocalDeleteObject ((ACPI_OBJECT_INTERNAL **) &ObjStack[ObjStackTop]);
/* Zero out the slot and move on */
ObjStack[ObjStackTop] = NULL;
ObjStackTop--;
}
}
}
}
}
}
else if (AE_PENDING == Status && PrefixCount != 0)
{
/* Ran out of segments after processing a prefix */
if (MODE_Load1 == LoadExecMode || MODE_Load == LoadExecMode)
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoName: ***Malformed Name***\n"));
REPORT_ERROR ("Ran out of segments after processing a prefix");
}
else
{
DEBUG_PRINT (ACPI_ERROR, ("AmlDoName: Malformed Name\n"));
}
Status = AE_AML_ERROR;
}
if (NameString)
{
CmFree (NameString);
}
FUNCTION_STATUS_EXIT (Status);
return Status;
}