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/*******************************************************************************
*
* Module Name: dmwalk - AML disassembly tree walk
*
******************************************************************************/
/*
* 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 <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acparser.h>
#include <contrib/dev/acpica/include/amlcode.h>
#include <contrib/dev/acpica/include/acdisasm.h>
#include <contrib/dev/acpica/include/acdebug.h>
#ifdef ACPI_DISASSEMBLER
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME ("dmwalk")
#define DB_FULL_OP_INFO "[%4.4s] @%5.5X #%4.4X: "
/* Stub for non-compiler code */
#ifndef ACPI_ASL_COMPILER
void
AcpiDmEmitExternals (
void)
{
return;
}
#endif
/* Local prototypes */
static ACPI_STATUS
AcpiDmDescendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static ACPI_STATUS
AcpiDmAscendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context);
static UINT32
AcpiDmBlockType (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: AcpiDmDisassemble
*
* PARAMETERS: WalkState - Current state
* Origin - Starting object
* NumOpcodes - Max number of opcodes to be displayed
*
* RETURN: None
*
* DESCRIPTION: Disassemble parser object and its children. This is the
* main entry point of the disassembler.
*
******************************************************************************/
void
AcpiDmDisassemble (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Origin,
UINT32 NumOpcodes)
{
ACPI_PARSE_OBJECT *Op = Origin;
ACPI_OP_WALK_INFO Info;
if (!Op)
{
return;
}
Info.Flags = 0;
Info.Level = 0;
Info.Count = 0;
Info.WalkState = WalkState;
AcpiDmWalkParseTree (Op, AcpiDmDescendingOp, AcpiDmAscendingOp, &Info);
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmWalkParseTree
*
* PARAMETERS: Op - Root Op object
* DescendingCallback - Called during tree descent
* AscendingCallback - Called during tree ascent
* Context - To be passed to the callbacks
*
* RETURN: Status from callback(s)
*
* DESCRIPTION: Walk the entire parse tree.
*
******************************************************************************/
void
AcpiDmWalkParseTree (
ACPI_PARSE_OBJECT *Op,
ASL_WALK_CALLBACK DescendingCallback,
ASL_WALK_CALLBACK AscendingCallback,
void *Context)
{
BOOLEAN NodePreviouslyVisited;
ACPI_PARSE_OBJECT *StartOp = Op;
ACPI_STATUS Status;
ACPI_PARSE_OBJECT *Next;
ACPI_OP_WALK_INFO *Info = Context;
Info->Level = 0;
NodePreviouslyVisited = FALSE;
while (Op)
{
if (NodePreviouslyVisited)
{
if (AscendingCallback)
{
Status = AscendingCallback (Op, Info->Level, Context);
if (ACPI_FAILURE (Status))
{
return;
}
}
}
else
{
/* Let the callback process the node */
Status = DescendingCallback (Op, Info->Level, Context);
if (ACPI_SUCCESS (Status))
{
/* Visit children first, once */
Next = AcpiPsGetArg (Op, 0);
if (Next)
{
Info->Level++;
Op = Next;
continue;
}
}
else if (Status != AE_CTRL_DEPTH)
{
/* Exit immediately on any error */
return;
}
}
/* Terminate walk at start op */
if (Op == StartOp)
{
break;
}
/* No more children, re-visit this node */
if (!NodePreviouslyVisited)
{
NodePreviouslyVisited = TRUE;
continue;
}
/* No more children, visit peers */
if (Op->Common.Next)
{
Op = Op->Common.Next;
NodePreviouslyVisited = FALSE;
}
else
{
/* No peers, re-visit parent */
if (Info->Level != 0 )
{
Info->Level--;
}
Op = Op->Common.Parent;
NodePreviouslyVisited = TRUE;
}
}
/* If we get here, the walk completed with no errors */
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmBlockType
*
* PARAMETERS: Op - Object to be examined
*
* RETURN: BlockType - not a block, parens, braces, or even both.
*
* DESCRIPTION: Type of block for this op (parens or braces)
*
******************************************************************************/
static UINT32
AcpiDmBlockType (
ACPI_PARSE_OBJECT *Op)
{
const ACPI_OPCODE_INFO *OpInfo;
if (!Op)
{
return (BLOCK_NONE);
}
switch (Op->Common.AmlOpcode)
{
case AML_ELSE_OP:
return (BLOCK_BRACE);
case AML_METHOD_OP:
case AML_DEVICE_OP:
case AML_SCOPE_OP:
case AML_PROCESSOR_OP:
case AML_POWER_RES_OP:
case AML_THERMAL_ZONE_OP:
case AML_IF_OP:
case AML_WHILE_OP:
case AML_FIELD_OP:
case AML_INDEX_FIELD_OP:
case AML_BANK_FIELD_OP:
return (BLOCK_PAREN | BLOCK_BRACE);
case AML_BUFFER_OP:
if (Op->Common.DisasmOpcode == ACPI_DASM_UNICODE)
{
return (BLOCK_NONE);
}
/*lint -fallthrough */
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
return (BLOCK_PAREN | BLOCK_BRACE);
case AML_EVENT_OP:
return (BLOCK_PAREN);
default:
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (OpInfo->Flags & AML_HAS_ARGS)
{
return (BLOCK_PAREN);
}
return (BLOCK_NONE);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmListType
*
* PARAMETERS: Op - Object to be examined
*
* RETURN: ListType - has commas or not.
*
* DESCRIPTION: Type of block for this op (parens or braces)
*
******************************************************************************/
UINT32
AcpiDmListType (
ACPI_PARSE_OBJECT *Op)
{
const ACPI_OPCODE_INFO *OpInfo;
if (!Op)
{
return (BLOCK_NONE);
}
switch (Op->Common.AmlOpcode)
{
case AML_ELSE_OP:
case AML_METHOD_OP:
case AML_DEVICE_OP:
case AML_SCOPE_OP:
case AML_POWER_RES_OP:
case AML_PROCESSOR_OP:
case AML_THERMAL_ZONE_OP:
case AML_IF_OP:
case AML_WHILE_OP:
case AML_FIELD_OP:
case AML_INDEX_FIELD_OP:
case AML_BANK_FIELD_OP:
return (BLOCK_NONE);
case AML_BUFFER_OP:
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
return (BLOCK_COMMA_LIST);
default:
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (OpInfo->Flags & AML_HAS_ARGS)
{
return (BLOCK_COMMA_LIST);
}
return (BLOCK_NONE);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmDescendingOp
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: First visitation of a parse object during tree descent.
* Decode opcode name and begin parameter list(s), if any.
*
******************************************************************************/
static ACPI_STATUS
AcpiDmDescendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
const ACPI_OPCODE_INFO *OpInfo;
UINT32 Name;
ACPI_PARSE_OBJECT *NextOp;
if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)
{
/* Ignore this op -- it was handled elsewhere */
return (AE_CTRL_DEPTH);
}
/* Level 0 is at the Definition Block level */
if (Level == 0)
{
/* In verbose mode, print the AML offset, opcode and depth count */
if (Info->WalkState)
{
VERBOSE_PRINT ((DB_FULL_OP_INFO,
(Info->WalkState->MethodNode ?
Info->WalkState->MethodNode->Name.Ascii : " "),
Op->Common.AmlOffset, (UINT32) Op->Common.AmlOpcode));
}
if (Op->Common.AmlOpcode == AML_SCOPE_OP)
{
/* This is the beginning of the Definition Block */
AcpiOsPrintf ("{\n");
/* Emit all External() declarations here */
AcpiDmEmitExternals ();
return (AE_OK);
}
}
else if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
(!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
(Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
{
/*
* This is a first-level element of a term list,
* indent a new line
*/
AcpiDmIndent (Level);
Info->LastLevel = Level;
Info->Count = 0;
}
/*
* This is an inexpensive mechanism to try and keep lines from getting
* too long. When the limit is hit, start a new line at the previous
* indent plus one. A better but more expensive mechanism would be to
* keep track of the current column.
*/
Info->Count++;
if (Info->Count /*+Info->LastLevel*/ > 10)
{
Info->Count = 0;
AcpiOsPrintf ("\n");
AcpiDmIndent (Info->LastLevel + 1);
}
/* Print the opcode name */
AcpiDmDisassembleOneOp (NULL, Info, Op);
if (Op->Common.DisasmOpcode == ACPI_DASM_LNOT_PREFIX)
{
return (AE_OK);
}
if ((Op->Common.AmlOpcode == AML_NAME_OP) ||
(Op->Common.AmlOpcode == AML_RETURN_OP))
{
Info->Level--;
}
/* Start the opcode argument list if necessary */
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if ((OpInfo->Flags & AML_HAS_ARGS) ||
(Op->Common.AmlOpcode == AML_EVENT_OP))
{
/* This opcode has an argument list */
if (AcpiDmBlockType (Op) & BLOCK_PAREN)
{
AcpiOsPrintf (" (");
}
/* If this is a named opcode, print the associated name value */
if (OpInfo->Flags & AML_NAMED)
{
switch (Op->Common.AmlOpcode)
{
case AML_ALIAS_OP:
NextOp = AcpiPsGetDepthNext (NULL, Op);
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiDmNamestring (NextOp->Common.Value.Name);
AcpiOsPrintf (", ");
/*lint -fallthrough */
default:
Name = AcpiPsGetName (Op);
if (Op->Named.Path)
{
AcpiDmNamestring ((char *) Op->Named.Path);
}
else
{
AcpiDmDumpName (Name);
}
if (Op->Common.AmlOpcode != AML_INT_NAMEDFIELD_OP)
{
if (AcpiGbl_DbOpt_verbose)
{
(void) AcpiPsDisplayObjectPathname (NULL, Op);
}
}
break;
}
switch (Op->Common.AmlOpcode)
{
case AML_METHOD_OP:
AcpiDmMethodFlags (Op);
AcpiOsPrintf (")");
break;
case AML_NAME_OP:
/* Check for _HID and related EISAID() */
AcpiDmIsEisaId (Op);
AcpiOsPrintf (", ");
break;
case AML_REGION_OP:
AcpiDmRegionFlags (Op);
break;
case AML_POWER_RES_OP:
/* Mark the next two Ops as part of the parameter list */
AcpiOsPrintf (", ");
NextOp = AcpiPsGetDepthNext (NULL, Op);
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
NextOp = NextOp->Common.Next;
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
return (AE_OK);
case AML_PROCESSOR_OP:
/* Mark the next three Ops as part of the parameter list */
AcpiOsPrintf (", ");
NextOp = AcpiPsGetDepthNext (NULL, Op);
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
NextOp = NextOp->Common.Next;
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
NextOp = NextOp->Common.Next;
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
return (AE_OK);
case AML_MUTEX_OP:
case AML_DATA_REGION_OP:
AcpiOsPrintf (", ");
return (AE_OK);
case AML_EVENT_OP:
case AML_ALIAS_OP:
return (AE_OK);
case AML_SCOPE_OP:
case AML_DEVICE_OP:
case AML_THERMAL_ZONE_OP:
AcpiOsPrintf (")");
break;
default:
AcpiOsPrintf ("*** Unhandled named opcode %X\n", Op->Common.AmlOpcode);
break;
}
}
else switch (Op->Common.AmlOpcode)
{
case AML_FIELD_OP:
case AML_BANK_FIELD_OP:
case AML_INDEX_FIELD_OP:
Info->BitOffset = 0;
/* Name of the parent OperationRegion */
NextOp = AcpiPsGetDepthNext (NULL, Op);
AcpiDmNamestring (NextOp->Common.Value.Name);
AcpiOsPrintf (", ");
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
switch (Op->Common.AmlOpcode)
{
case AML_BANK_FIELD_OP:
/* Namestring - Bank Name */
NextOp = AcpiPsGetDepthNext (NULL, NextOp);
AcpiDmNamestring (NextOp->Common.Value.Name);
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiOsPrintf (", ");
/*
* Bank Value. This is a TermArg in the middle of the parameter
* list, must handle it here.
*
* Disassemble the TermArg parse tree. ACPI_PARSEOP_PARAMLIST
* eliminates newline in the output.
*/
NextOp = NextOp->Common.Next;
Info->Flags = ACPI_PARSEOP_PARAMLIST;
AcpiDmWalkParseTree (NextOp, AcpiDmDescendingOp, AcpiDmAscendingOp, Info);
Info->Flags = 0;
Info->Level = Level;
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiOsPrintf (", ");
break;
case AML_INDEX_FIELD_OP:
/* Namestring - Data Name */
NextOp = AcpiPsGetDepthNext (NULL, NextOp);
AcpiDmNamestring (NextOp->Common.Value.Name);
AcpiOsPrintf (", ");
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
break;
default:
break;
}
AcpiDmFieldFlags (NextOp);
break;
case AML_BUFFER_OP:
/* The next op is the size parameter */
NextOp = AcpiPsGetDepthNext (NULL, Op);
if (!NextOp)
{
/* Single-step support */
return (AE_OK);
}
if (Op->Common.DisasmOpcode == ACPI_DASM_RESOURCE)
{
/*
* We have a resource list. Don't need to output
* the buffer size Op. Open up a new block
*/
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
NextOp = NextOp->Common.Next;
AcpiOsPrintf (")\n");
AcpiDmIndent (Info->Level);
AcpiOsPrintf ("{\n");
return (AE_OK);
}
/* Normal Buffer, mark size as in the parameter list */
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
return (AE_OK);
case AML_VAR_PACKAGE_OP:
case AML_IF_OP:
case AML_WHILE_OP:
/* The next op is the size or predicate parameter */
NextOp = AcpiPsGetDepthNext (NULL, Op);
if (NextOp)
{
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
}
return (AE_OK);
case AML_PACKAGE_OP:
/* The next op is the size or predicate parameter */
NextOp = AcpiPsGetDepthNext (NULL, Op);
if (NextOp)
{
NextOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMLIST;
}
return (AE_OK);
case AML_MATCH_OP:
AcpiDmMatchOp (Op);
break;
default:
break;
}
if (AcpiDmBlockType (Op) & BLOCK_BRACE)
{
AcpiOsPrintf ("\n");
AcpiDmIndent (Level);
AcpiOsPrintf ("{\n");
}
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmAscendingOp
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Second visitation of a parse object, during ascent of parse
* tree. Close out any parameter lists and complete the opcode.
*
******************************************************************************/
static ACPI_STATUS
AcpiDmAscendingOp (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
ACPI_OP_WALK_INFO *Info = Context;
if (Op->Common.DisasmFlags & ACPI_PARSEOP_IGNORE)
{
/* Ignore this op -- it was handled elsewhere */
return (AE_OK);
}
if ((Level == 0) && (Op->Common.AmlOpcode == AML_SCOPE_OP))
{
/* Indicates the end of the current descriptor block (table) */
AcpiOsPrintf ("}\n\n");
return (AE_OK);
}
switch (AcpiDmBlockType (Op))
{
case BLOCK_PAREN:
/* Completed an op that has arguments, add closing paren */
AcpiOsPrintf (")");
/* Could be a nested operator, check if comma required */
if (!AcpiDmCommaIfListMember (Op))
{
if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
(!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
(Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
{
/*
* This is a first-level element of a term list
* start a new line
*/
if (!(Info->Flags & ACPI_PARSEOP_PARAMLIST))
{
AcpiOsPrintf ("\n");
}
}
}
break;
case BLOCK_BRACE:
case (BLOCK_BRACE | BLOCK_PAREN):
/* Completed an op that has a term list, add closing brace */
if (Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST)
{
AcpiOsPrintf ("}");
}
else
{
AcpiDmIndent (Level);
AcpiOsPrintf ("}");
}
AcpiDmCommaIfListMember (Op);
if (AcpiDmBlockType (Op->Common.Parent) != BLOCK_PAREN)
{
AcpiOsPrintf ("\n");
if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_EMPTY_TERMLIST))
{
if ((Op->Common.AmlOpcode == AML_IF_OP) &&
(Op->Common.Next) &&
(Op->Common.Next->Common.AmlOpcode == AML_ELSE_OP))
{
break;
}
if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
(!Op->Common.Next))
{
break;
}
AcpiOsPrintf ("\n");
}
}
break;
case BLOCK_NONE:
default:
/* Could be a nested operator, check if comma required */
if (!AcpiDmCommaIfListMember (Op))
{
if ((AcpiDmBlockType (Op->Common.Parent) & BLOCK_BRACE) &&
(!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)) &&
(Op->Common.AmlOpcode != AML_INT_BYTELIST_OP))
{
/*
* This is a first-level element of a term list
* start a new line
*/
AcpiOsPrintf ("\n");
}
}
else if (Op->Common.Parent)
{
switch (Op->Common.Parent->Common.AmlOpcode)
{
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
if (!(Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))
{
AcpiOsPrintf ("\n");
}
break;
default:
break;
}
}
break;
}
if (Op->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST)
{
if ((Op->Common.Next) &&
(Op->Common.Next->Common.DisasmFlags & ACPI_PARSEOP_PARAMLIST))
{
return (AE_OK);
}
/*
* Just completed a parameter node for something like "Buffer (param)".
* Close the paren and open up the term list block with a brace
*/
if (Op->Common.Next)
{
AcpiOsPrintf (")\n");
AcpiDmIndent (Level - 1);
AcpiOsPrintf ("{\n");
}
else
{
Op->Common.Parent->Common.DisasmFlags |=
ACPI_PARSEOP_EMPTY_TERMLIST;
AcpiOsPrintf (") {");
}
}
if ((Op->Common.AmlOpcode == AML_NAME_OP) ||
(Op->Common.AmlOpcode == AML_RETURN_OP))
{
Info->Level++;
}
return (AE_OK);
}
#endif /* ACPI_DISASSEMBLER */