dmbuffer.c revision 26f3cdf03f1adcc98f6d3d99843ee71e9229a8c0
/*******************************************************************************
*
* Module Name: dmbuffer - AML disassembler, buffer and string support
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2011, 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 "acdisasm.h"
#include "acparser.h"
#include "amlcode.h"
#ifdef ACPI_DISASSEMBLER
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME ("dmbuffer")
/* Local prototypes */
static void
static void
/*******************************************************************************
*
* FUNCTION: AcpiDmDisasmByteList
*
* PARAMETERS: Level - Current source code indentation level
* ByteData - Pointer to the byte list
* ByteCount - Length of the byte list
*
* RETURN: None
*
* DESCRIPTION: Dump an AML "ByteList" in Hex format. 8 bytes per line, prefixed
* with the hex buffer offset.
*
******************************************************************************/
void
{
UINT32 i;
if (!ByteCount)
{
return;
}
/* Dump the byte list */
for (i = 0; i < ByteCount; i++)
{
/* New line every 8 bytes */
if (((i % 8) == 0) && (i < ByteCount))
{
if (i > 0)
{
AcpiOsPrintf ("\n");
}
if (ByteCount > 7)
{
AcpiOsPrintf ("/* %04X */ ", i);
}
}
/* Add comma if there are more bytes to display */
if (i < (ByteCount -1))
{
AcpiOsPrintf (", ");
}
}
if (Level)
{
AcpiOsPrintf ("\n");
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmByteList
*
* PARAMETERS: Info - Parse tree walk info
* Op - Byte list op
*
* RETURN: None
*
* DESCRIPTION: Dump a buffer byte list, handling the various types of buffers.
* Buffer type must be already set in the Op DisasmOpcode.
*
******************************************************************************/
void
{
/*
* The byte list belongs to a buffer, and can be produced by either
* a ResourceTemplate, Unicode, quoted string, or a plain byte list.
*/
{
case ACPI_DASM_RESOURCE:
break;
case ACPI_DASM_STRING:
AcpiOsPrintf ("\n");
break;
case ACPI_DASM_UNICODE:
AcpiDmUnicode (Op);
break;
case ACPI_DASM_BUFFER:
default:
/*
* Not a resource, string, or unicode string.
* Just dump the buffer
*/
break;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsUnicodeBuffer
*
* PARAMETERS: Op - Buffer Object to be examined
*
* RETURN: TRUE if buffer contains a UNICODE string
*
* DESCRIPTION: Determine if a buffer Op contains a Unicode string
*
******************************************************************************/
{
UINT32 i;
/* Buffer size is the buffer argument */
/* Next, the initializer byte list to examine */
if (!NextOp)
{
return (FALSE);
}
/* Extract the byte list info */
/*
* Unicode string must have an even number of bytes and last
* word must be zero
*/
if ((!ByteCount) ||
(ByteCount < 4) ||
(ByteCount & 1) ||
{
return (FALSE);
}
/* For each word, 1st byte must be ascii, 2nd byte must be zero */
{
if ((!ACPI_IS_PRINT (ByteData[i])) ||
{
return (FALSE);
}
}
/* Ignore the Size argument in the disassembly of this buffer op */
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsStringBuffer
*
* PARAMETERS: Op - Buffer Object to be examined
*
* RETURN: TRUE if buffer contains a ASCII string, FALSE otherwise
*
* DESCRIPTION: Determine if a buffer Op contains a ASCII string
*
******************************************************************************/
{
UINT32 i;
/* Buffer size is the buffer argument */
/* Next, the initializer byte list to examine */
if (!NextOp)
{
return (FALSE);
}
/* Extract the byte list info */
/* Last byte must be the null terminator */
if ((!ByteCount) ||
(ByteCount < 2) ||
{
return (FALSE);
}
for (i = 0; i < (ByteCount - 1); i++)
{
/* TBD: allow some escapes (non-ascii chars).
* they will be handled in the string output routine
*/
if (!ACPI_IS_PRINT (ByteData[i]))
{
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmUnicode
*
* PARAMETERS: Op - Byte List op containing Unicode string
*
* RETURN: None
*
* DESCRIPTION: Dump Unicode string as a standard ASCII string. (Remove
* the extra zero bytes).
*
******************************************************************************/
static void
{
UINT32 i;
/* Extract the buffer info as a WORD buffer */
AcpiOsPrintf ("\"");
/* Write every other byte as an ASCII character */
for (i = 0; i < (WordCount - 1); i++)
{
}
AcpiOsPrintf ("\")");
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsEisaIdElement
*
* PARAMETERS: Op - Op to be examined
*
* RETURN: None
*
* DESCRIPTION: Determine if an Op (argument to _HID or _CID) can be converted
* to an EISA ID.
*
******************************************************************************/
static void
{
UINT32 i;
/* The parameter must be either a word or a dword */
{
return;
}
/* Swap from little-endian to big-endian to simplify conversion */
/* Create the 3 leading ASCII letters */
/* Verify that all 3 are ascii and alpha */
for (i = 0; i < 3; i++)
{
if (!ACPI_IS_ASCII (Prefix[i]) ||
!ACPI_IS_ALPHA (Prefix[i]))
{
return;
}
}
/* OK - mark this node as convertable to an EISA ID */
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsEisaId
*
* PARAMETERS: Op - Op to be examined
*
* RETURN: None
*
* DESCRIPTION: Determine if a Name() Op can be converted to an EisaId.
*
******************************************************************************/
void
{
/* Get the NameSegment */
if (!Name)
{
return;
}
if (!NextOp)
{
return;
}
/* Check for _HID - has one argument */
{
return;
}
/* Exit if not _CID */
{
return;
}
/* _CID can contain a single argument or a package */
{
return;
}
/* _CID with Package: get the package length */
/* Don't need to use the length, just walk the peer list */
while (NextOp)
{
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmEisaId
*
* PARAMETERS: EncodedId - Raw encoded EISA ID.
*
* RETURN: None
*
* DESCRIPTION: Convert an encoded EISAID back to the original ASCII String.
*
******************************************************************************/
void
{
/* Swap from little-endian to big-endian to simplify conversion */
/* Split to form "AAANNNN" string */
AcpiOsPrintf ("EisaId (\"%c%c%c%4.4X\")",
/* Three Alpha characters (AAA), 5 bits each */
/* Numeric part (NNNN) is simply the lower 16 bits */
}
#endif