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opnsense-src/sys/contrib/dev/acpica/components/disassembler/dmopcode.c
Jung-uk Kim 284829482e Merge ACPICA 20161222.
2017-01-05 21:28:25 +00:00

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/*******************************************************************************
*
* Module Name: dmopcode - AML disassembler, specific AML opcodes
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2016, 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/acinterp.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <contrib/dev/acpica/include/acdebug.h>
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME ("dmopcode")
/* Local prototypes */
static void
AcpiDmMatchKeyword (
ACPI_PARSE_OBJECT *Op);
static void
AcpiDmConvertToElseIf (
ACPI_PARSE_OBJECT *Op);
static void
AcpiDmPromoteSubtree (
ACPI_PARSE_OBJECT *StartOp);
static BOOLEAN
AcpiDmIsSwitchBlock (
ACPI_PARSE_OBJECT *Op);
static BOOLEAN
AcpiDmIsCaseBlock (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: AcpiDmDisplayTargetPathname
*
* PARAMETERS: Op - Parse object
*
* RETURN: None
*
* DESCRIPTION: For AML opcodes that have a target operand, display the full
* pathname for the target, in a comment field. Handles Return()
* statements also.
*
******************************************************************************/
void
AcpiDmDisplayTargetPathname (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *NextOp;
ACPI_PARSE_OBJECT *PrevOp = NULL;
char *Pathname;
const ACPI_OPCODE_INFO *OpInfo;
if (Op->Common.AmlOpcode == AML_RETURN_OP)
{
PrevOp = Op->Asl.Value.Arg;
}
else
{
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (!(OpInfo->Flags & AML_HAS_TARGET))
{
return;
}
/* Target is the last Op in the arg list */
NextOp = Op->Asl.Value.Arg;
while (NextOp)
{
PrevOp = NextOp;
NextOp = PrevOp->Asl.Next;
}
}
if (!PrevOp)
{
return;
}
/* We must have a namepath AML opcode */
if (PrevOp->Asl.AmlOpcode != AML_INT_NAMEPATH_OP)
{
return;
}
/* A null string is the "no target specified" case */
if (!PrevOp->Asl.Value.String)
{
return;
}
/* No node means "unresolved external reference" */
if (!PrevOp->Asl.Node)
{
AcpiOsPrintf (" /* External reference */");
return;
}
/* Ignore if path is already from the root */
if (*PrevOp->Asl.Value.String == '\\')
{
return;
}
/* Now: we can get the full pathname */
Pathname = AcpiNsGetExternalPathname (PrevOp->Asl.Node);
if (!Pathname)
{
return;
}
AcpiOsPrintf (" /* %s */", Pathname);
ACPI_FREE (Pathname);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmNotifyDescription
*
* PARAMETERS: Op - Name() parse object
*
* RETURN: None
*
* DESCRIPTION: Emit a description comment for the value associated with a
* Notify() operator.
*
******************************************************************************/
void
AcpiDmNotifyDescription (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *NextOp;
ACPI_NAMESPACE_NODE *Node;
UINT8 NotifyValue;
UINT8 Type = ACPI_TYPE_ANY;
/* The notify value is the second argument */
NextOp = Op->Asl.Value.Arg;
NextOp = NextOp->Asl.Next;
switch (NextOp->Common.AmlOpcode)
{
case AML_ZERO_OP:
case AML_ONE_OP:
NotifyValue = (UINT8) NextOp->Common.AmlOpcode;
break;
case AML_BYTE_OP:
NotifyValue = (UINT8) NextOp->Asl.Value.Integer;
break;
default:
return;
}
/*
* Attempt to get the namespace node so we can determine the object type.
* Some notify values are dependent on the object type (Device, Thermal,
* or Processor).
*/
Node = Op->Asl.Node;
if (Node)
{
Type = Node->Type;
}
AcpiOsPrintf (" // %s", AcpiUtGetNotifyName (NotifyValue, Type));
}
/*******************************************************************************
*
* FUNCTION: AcpiDmPredefinedDescription
*
* PARAMETERS: Op - Name() parse object
*
* RETURN: None
*
* DESCRIPTION: Emit a description comment for a predefined ACPI name.
* Used for iASL compiler only.
*
******************************************************************************/
void
AcpiDmPredefinedDescription (
ACPI_PARSE_OBJECT *Op)
{
#ifdef ACPI_ASL_COMPILER
const AH_PREDEFINED_NAME *Info;
char *NameString;
int LastCharIsDigit;
int LastCharsAreHex;
if (!Op)
{
return;
}
/* Ensure that the comment field is emitted only once */
if (Op->Common.DisasmFlags & ACPI_PARSEOP_PREDEFINED_CHECKED)
{
return;
}
Op->Common.DisasmFlags |= ACPI_PARSEOP_PREDEFINED_CHECKED;
/* Predefined name must start with an underscore */
NameString = ACPI_CAST_PTR (char, &Op->Named.Name);
if (NameString[0] != '_')
{
return;
}
/*
* Check for the special ACPI names:
* _ACd, _ALd, _EJd, _Exx, _Lxx, _Qxx, _Wxx, _T_a
* (where d=decimal_digit, x=hex_digit, a=anything)
*
* Convert these to the generic name for table lookup.
* Note: NameString is guaranteed to be upper case here.
*/
LastCharIsDigit =
(isdigit ((int) NameString[3])); /* d */
LastCharsAreHex =
(isxdigit ((int) NameString[2]) && /* xx */
isxdigit ((int) NameString[3]));
switch (NameString[1])
{
case 'A':
if ((NameString[2] == 'C') && (LastCharIsDigit))
{
NameString = "_ACx";
}
else if ((NameString[2] == 'L') && (LastCharIsDigit))
{
NameString = "_ALx";
}
break;
case 'E':
if ((NameString[2] == 'J') && (LastCharIsDigit))
{
NameString = "_EJx";
}
else if (LastCharsAreHex)
{
NameString = "_Exx";
}
break;
case 'L':
if (LastCharsAreHex)
{
NameString = "_Lxx";
}
break;
case 'Q':
if (LastCharsAreHex)
{
NameString = "_Qxx";
}
break;
case 'T':
if (NameString[2] == '_')
{
NameString = "_T_x";
}
break;
case 'W':
if (LastCharsAreHex)
{
NameString = "_Wxx";
}
break;
default:
break;
}
/* Match the name in the info table */
Info = AcpiAhMatchPredefinedName (NameString);
if (Info)
{
AcpiOsPrintf (" // %4.4s: %s",
NameString, ACPI_CAST_PTR (char, Info->Description));
}
#endif
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmFieldPredefinedDescription
*
* PARAMETERS: Op - Parse object
*
* RETURN: None
*
* DESCRIPTION: Emit a description comment for a resource descriptor tag
* (which is a predefined ACPI name.) Used for iASL compiler only.
*
******************************************************************************/
void
AcpiDmFieldPredefinedDescription (
ACPI_PARSE_OBJECT *Op)
{
#ifdef ACPI_ASL_COMPILER
ACPI_PARSE_OBJECT *IndexOp;
char *Tag;
const ACPI_OPCODE_INFO *OpInfo;
const AH_PREDEFINED_NAME *Info;
if (!Op)
{
return;
}
/* Ensure that the comment field is emitted only once */
if (Op->Common.DisasmFlags & ACPI_PARSEOP_PREDEFINED_CHECKED)
{
return;
}
Op->Common.DisasmFlags |= ACPI_PARSEOP_PREDEFINED_CHECKED;
/*
* Op must be one of the Create* operators: CreateField, CreateBitField,
* CreateByteField, CreateWordField, CreateDwordField, CreateQwordField
*/
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
if (!(OpInfo->Flags & AML_CREATE))
{
return;
}
/* Second argument is the Index argument */
IndexOp = Op->Common.Value.Arg;
IndexOp = IndexOp->Common.Next;
/* Index argument must be a namepath */
if (IndexOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP)
{
return;
}
/* Major cheat: We previously put the Tag ptr in the Node field */
Tag = ACPI_CAST_PTR (char, IndexOp->Common.Node);
if (!Tag)
{
return;
}
/* Match the name in the info table */
Info = AcpiAhMatchPredefinedName (Tag);
if (Info)
{
AcpiOsPrintf (" // %4.4s: %s", Tag,
ACPI_CAST_PTR (char, Info->Description));
}
#endif
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmMethodFlags
*
* PARAMETERS: Op - Method Object to be examined
*
* RETURN: None
*
* DESCRIPTION: Decode control method flags
*
******************************************************************************/
void
AcpiDmMethodFlags (
ACPI_PARSE_OBJECT *Op)
{
UINT32 Flags;
UINT32 Args;
/* The next Op contains the flags */
Op = AcpiPsGetDepthNext (NULL, Op);
Flags = (UINT8) Op->Common.Value.Integer;
Args = Flags & 0x07;
/* Mark the Op as completed */
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
/* 1) Method argument count */
AcpiOsPrintf (", %u, ", Args);
/* 2) Serialize rule */
if (!(Flags & 0x08))
{
AcpiOsPrintf ("Not");
}
AcpiOsPrintf ("Serialized");
/* 3) SyncLevel */
if (Flags & 0xF0)
{
AcpiOsPrintf (", %u", Flags >> 4);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmFieldFlags
*
* PARAMETERS: Op - Field Object to be examined
*
* RETURN: None
*
* DESCRIPTION: Decode Field definition flags
*
******************************************************************************/
void
AcpiDmFieldFlags (
ACPI_PARSE_OBJECT *Op)
{
UINT32 Flags;
Op = Op->Common.Next;
Flags = (UINT8) Op->Common.Value.Integer;
/* Mark the Op as completed */
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiOsPrintf ("%s, ", AcpiGbl_AccessTypes [Flags & 0x07]);
AcpiOsPrintf ("%s, ", AcpiGbl_LockRule [(Flags & 0x10) >> 4]);
AcpiOsPrintf ("%s)", AcpiGbl_UpdateRules [(Flags & 0x60) >> 5]);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmAddressSpace
*
* PARAMETERS: SpaceId - ID to be translated
*
* RETURN: None
*
* DESCRIPTION: Decode a SpaceId to an AddressSpaceKeyword
*
******************************************************************************/
void
AcpiDmAddressSpace (
UINT8 SpaceId)
{
if (SpaceId >= ACPI_NUM_PREDEFINED_REGIONS)
{
if (SpaceId == 0x7F)
{
AcpiOsPrintf ("FFixedHW, ");
}
else
{
AcpiOsPrintf ("0x%.2X, ", SpaceId);
}
}
else
{
AcpiOsPrintf ("%s, ", AcpiGbl_RegionTypes [SpaceId]);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmRegionFlags
*
* PARAMETERS: Op - Object to be examined
*
* RETURN: None
*
* DESCRIPTION: Decode OperationRegion flags
*
******************************************************************************/
void
AcpiDmRegionFlags (
ACPI_PARSE_OBJECT *Op)
{
/* The next Op contains the SpaceId */
Op = AcpiPsGetDepthNext (NULL, Op);
/* Mark the Op as completed */
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiOsPrintf (", ");
AcpiDmAddressSpace ((UINT8) Op->Common.Value.Integer);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmMatchOp
*
* PARAMETERS: Op - Match Object to be examined
*
* RETURN: None
*
* DESCRIPTION: Decode Match opcode operands
*
******************************************************************************/
void
AcpiDmMatchOp (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *NextOp;
NextOp = AcpiPsGetDepthNext (NULL, Op);
NextOp = NextOp->Common.Next;
if (!NextOp)
{
/* Handle partial tree during single-step */
return;
}
/* Mark the two nodes that contain the encoding for the match keywords */
NextOp->Common.DisasmOpcode = ACPI_DASM_MATCHOP;
NextOp = NextOp->Common.Next;
NextOp = NextOp->Common.Next;
NextOp->Common.DisasmOpcode = ACPI_DASM_MATCHOP;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmMatchKeyword
*
* PARAMETERS: Op - Match Object to be examined
*
* RETURN: None
*
* DESCRIPTION: Decode Match opcode operands
*
******************************************************************************/
static void
AcpiDmMatchKeyword (
ACPI_PARSE_OBJECT *Op)
{
if (((UINT32) Op->Common.Value.Integer) > ACPI_MAX_MATCH_OPCODE)
{
AcpiOsPrintf ("/* Unknown Match Keyword encoding */");
}
else
{
AcpiOsPrintf ("%s",
AcpiGbl_MatchOps[(ACPI_SIZE) Op->Common.Value.Integer]);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmDisassembleOneOp
*
* PARAMETERS: WalkState - Current walk info
* Info - Parse tree walk info
* Op - Op that is to be printed
*
* RETURN: None
*
* DESCRIPTION: Disassemble a single AML opcode
*
******************************************************************************/
void
AcpiDmDisassembleOneOp (
ACPI_WALK_STATE *WalkState,
ACPI_OP_WALK_INFO *Info,
ACPI_PARSE_OBJECT *Op)
{
const ACPI_OPCODE_INFO *OpInfo = NULL;
UINT32 Offset;
UINT32 Length;
ACPI_PARSE_OBJECT *Child;
ACPI_STATUS Status;
UINT8 *Aml;
const AH_DEVICE_ID *IdInfo;
if (!Op)
{
AcpiOsPrintf ("<NULL OP PTR>");
return;
}
if (Op->Common.DisasmFlags & ACPI_PARSEOP_ELSEIF)
{
return; /* ElseIf macro was already emitted */
}
switch (Op->Common.DisasmOpcode)
{
case ACPI_DASM_MATCHOP:
AcpiDmMatchKeyword (Op);
return;
case ACPI_DASM_LNOT_SUFFIX:
if (!AcpiGbl_CstyleDisassembly)
{
switch (Op->Common.AmlOpcode)
{
case AML_LEQUAL_OP:
AcpiOsPrintf ("LNotEqual");
break;
case AML_LGREATER_OP:
AcpiOsPrintf ("LLessEqual");
break;
case AML_LLESS_OP:
AcpiOsPrintf ("LGreaterEqual");
break;
default:
break;
}
}
Op->Common.DisasmOpcode = 0;
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
return;
default:
break;
}
OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode);
/* The op and arguments */
switch (Op->Common.AmlOpcode)
{
case AML_LNOT_OP:
Child = Op->Common.Value.Arg;
if ((Child->Common.AmlOpcode == AML_LEQUAL_OP) ||
(Child->Common.AmlOpcode == AML_LGREATER_OP) ||
(Child->Common.AmlOpcode == AML_LLESS_OP))
{
Child->Common.DisasmOpcode = ACPI_DASM_LNOT_SUFFIX;
Op->Common.DisasmOpcode = ACPI_DASM_LNOT_PREFIX;
}
else
{
AcpiOsPrintf ("%s", OpInfo->Name);
}
break;
case AML_BYTE_OP:
AcpiOsPrintf ("0x%2.2X", (UINT32) Op->Common.Value.Integer);
break;
case AML_WORD_OP:
if (Op->Common.DisasmOpcode == ACPI_DASM_EISAID)
{
AcpiDmDecompressEisaId ((UINT32) Op->Common.Value.Integer);
}
else
{
AcpiOsPrintf ("0x%4.4X", (UINT32) Op->Common.Value.Integer);
}
break;
case AML_DWORD_OP:
if (Op->Common.DisasmOpcode == ACPI_DASM_EISAID)
{
AcpiDmDecompressEisaId ((UINT32) Op->Common.Value.Integer);
}
else
{
AcpiOsPrintf ("0x%8.8X", (UINT32) Op->Common.Value.Integer);
}
break;
case AML_QWORD_OP:
AcpiOsPrintf ("0x%8.8X%8.8X",
ACPI_FORMAT_UINT64 (Op->Common.Value.Integer));
break;
case AML_STRING_OP:
AcpiUtPrintString (Op->Common.Value.String, ACPI_UINT16_MAX);
/* For _HID/_CID strings, attempt to output a descriptive comment */
if (Op->Common.DisasmOpcode == ACPI_DASM_HID_STRING)
{
/* If we know about the ID, emit the description */
IdInfo = AcpiAhMatchHardwareId (Op->Common.Value.String);
if (IdInfo)
{
AcpiOsPrintf (" /* %s */", IdInfo->Description);
}
}
break;
case AML_BUFFER_OP:
/*
* Determine the type of buffer. We can have one of the following:
*
* 1) ResourceTemplate containing Resource Descriptors.
* 2) Unicode String buffer
* 3) ASCII String buffer
* 4) Raw data buffer (if none of the above)
*
* Since there are no special AML opcodes to differentiate these
* types of buffers, we have to closely look at the data in the
* buffer to determine the type.
*/
if (!AcpiGbl_NoResourceDisassembly)
{
Status = AcpiDmIsResourceTemplate (WalkState, Op);
if (ACPI_SUCCESS (Status))
{
Op->Common.DisasmOpcode = ACPI_DASM_RESOURCE;
AcpiOsPrintf ("ResourceTemplate");
break;
}
else if (Status == AE_AML_NO_RESOURCE_END_TAG)
{
AcpiOsPrintf (
"/**** Is ResourceTemplate, "
"but EndTag not at buffer end ****/ ");
}
}
if (AcpiDmIsUuidBuffer (Op))
{
Op->Common.DisasmOpcode = ACPI_DASM_UUID;
AcpiOsPrintf ("ToUUID (");
}
else if (AcpiDmIsUnicodeBuffer (Op))
{
Op->Common.DisasmOpcode = ACPI_DASM_UNICODE;
AcpiOsPrintf ("Unicode (");
}
else if (AcpiDmIsStringBuffer (Op))
{
Op->Common.DisasmOpcode = ACPI_DASM_STRING;
AcpiOsPrintf ("Buffer");
}
else if (AcpiDmIsPldBuffer (Op))
{
Op->Common.DisasmOpcode = ACPI_DASM_PLD_METHOD;
AcpiOsPrintf ("ToPLD (");
}
else
{
Op->Common.DisasmOpcode = ACPI_DASM_BUFFER;
AcpiOsPrintf ("Buffer");
}
break;
case AML_INT_NAMEPATH_OP:
AcpiDmNamestring (Op->Common.Value.Name);
break;
case AML_INT_NAMEDFIELD_OP:
Length = AcpiDmDumpName (Op->Named.Name);
AcpiOsPrintf (",%*.s %u", (unsigned) (5 - Length), " ",
(UINT32) Op->Common.Value.Integer);
AcpiDmCommaIfFieldMember (Op);
Info->BitOffset += (UINT32) Op->Common.Value.Integer;
break;
case AML_INT_RESERVEDFIELD_OP:
/* Offset() -- Must account for previous offsets */
Offset = (UINT32) Op->Common.Value.Integer;
Info->BitOffset += Offset;
if (Info->BitOffset % 8 == 0)
{
AcpiOsPrintf ("Offset (0x%.2X)", ACPI_DIV_8 (Info->BitOffset));
}
else
{
AcpiOsPrintf (" , %u", Offset);
}
AcpiDmCommaIfFieldMember (Op);
break;
case AML_INT_ACCESSFIELD_OP:
case AML_INT_EXTACCESSFIELD_OP:
AcpiOsPrintf ("AccessAs (%s, ",
AcpiGbl_AccessTypes [(UINT32) (Op->Common.Value.Integer & 0x7)]);
AcpiDmDecodeAttribute ((UINT8) (Op->Common.Value.Integer >> 8));
if (Op->Common.AmlOpcode == AML_INT_EXTACCESSFIELD_OP)
{
AcpiOsPrintf (" (0x%2.2X)", (unsigned)
((Op->Common.Value.Integer >> 16) & 0xFF));
}
AcpiOsPrintf (")");
AcpiDmCommaIfFieldMember (Op);
break;
case AML_INT_CONNECTION_OP:
/*
* Two types of Connection() - one with a buffer object, the
* other with a namestring that points to a buffer object.
*/
AcpiOsPrintf ("Connection (");
Child = Op->Common.Value.Arg;
if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP)
{
AcpiOsPrintf ("\n");
Aml = Child->Named.Data;
Length = (UINT32) Child->Common.Value.Integer;
Info->Level += 1;
Info->MappingOp = Op;
Op->Common.DisasmOpcode = ACPI_DASM_RESOURCE;
AcpiDmResourceTemplate (Info, Op->Common.Parent, Aml, Length);
Info->Level -= 1;
AcpiDmIndent (Info->Level);
}
else
{
AcpiDmNamestring (Child->Common.Value.Name);
}
AcpiOsPrintf (")");
AcpiDmCommaIfFieldMember (Op);
AcpiOsPrintf ("\n");
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE; /* for now, ignore in AcpiDmAscendingOp */
Child->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
break;
case AML_INT_BYTELIST_OP:
AcpiDmByteList (Info, Op);
break;
case AML_INT_METHODCALL_OP:
Op = AcpiPsGetDepthNext (NULL, Op);
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
AcpiDmNamestring (Op->Common.Value.Name);
break;
case AML_WHILE_OP:
if (AcpiDmIsSwitchBlock(Op))
{
AcpiOsPrintf ("%s", "Switch");
break;
}
AcpiOsPrintf ("%s", OpInfo->Name);
break;
case AML_IF_OP:
if (Op->Common.DisasmOpcode == ACPI_DASM_CASE)
{
AcpiOsPrintf ("%s", "Case");
break;
}
AcpiOsPrintf ("%s", OpInfo->Name);
break;
case AML_ELSE_OP:
AcpiDmConvertToElseIf (Op);
break;
case AML_EXTERNAL_OP:
if (AcpiGbl_DmEmitExternalOpcodes)
{
AcpiOsPrintf ("/* Opcode 0x15 */ ");
/* Fallthrough */
}
else
{
break;
}
default:
/* Just get the opcode name and print it */
AcpiOsPrintf ("%s", OpInfo->Name);
#ifdef ACPI_DEBUGGER
if ((Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP) &&
(WalkState) &&
(WalkState->Results) &&
(WalkState->ResultCount))
{
AcpiDbDecodeInternalObject (
WalkState->Results->Results.ObjDesc [
(WalkState->ResultCount - 1) %
ACPI_RESULTS_FRAME_OBJ_NUM]);
}
#endif
break;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmConvertToElseIf
*
* PARAMETERS: OriginalElseOp - ELSE Object to be examined
*
* RETURN: None. Emits either an "Else" or an "ElseIf" ASL operator.
*
* DESCRIPTION: Detect and convert an If..Else..If sequence to If..ElseIf
*
* EXAMPLE:
*
* This If..Else..If nested sequence:
*
* If (Arg0 == 1)
* {
* Local0 = 4
* }
* Else
* {
* If (Arg0 == 2)
* {
* Local0 = 5
* }
* }
*
* Is converted to this simpler If..ElseIf sequence:
*
* If (Arg0 == 1)
* {
* Local0 = 4
* }
* ElseIf (Arg0 == 2)
* {
* Local0 = 5
* }
*
* NOTE: There is no actual ElseIf AML opcode. ElseIf is essentially an ASL
* macro that emits an Else opcode followed by an If opcode. This function
* reverses these AML sequences back to an ElseIf macro where possible. This
* can make the disassembled ASL code simpler and more like the original code.
*
******************************************************************************/
static void
AcpiDmConvertToElseIf (
ACPI_PARSE_OBJECT *OriginalElseOp)
{
ACPI_PARSE_OBJECT *IfOp;
ACPI_PARSE_OBJECT *ElseOp;
/*
* To be able to perform the conversion, two conditions must be satisfied:
* 1) The first child of the Else must be an If statement.
* 2) The If block can only be followed by an Else block and these must
* be the only blocks under the original Else.
*/
IfOp = OriginalElseOp->Common.Value.Arg;
if (!IfOp ||
(IfOp->Common.AmlOpcode != AML_IF_OP) ||
(IfOp->Asl.Next && (IfOp->Asl.Next->Common.AmlOpcode != AML_ELSE_OP)))
{
/* Not a proper Else..If sequence, cannot convert to ElseIf */
if (OriginalElseOp->Common.DisasmOpcode == ACPI_DASM_DEFAULT)
{
AcpiOsPrintf ("%s", "Default");
return;
}
AcpiOsPrintf ("%s", "Else");
return;
}
/* Cannot have anything following the If...Else block */
ElseOp = IfOp->Common.Next;
if (ElseOp && ElseOp->Common.Next)
{
if (OriginalElseOp->Common.DisasmOpcode == ACPI_DASM_DEFAULT)
{
AcpiOsPrintf ("%s", "Default");
return;
}
AcpiOsPrintf ("%s", "Else");
return;
}
if (OriginalElseOp->Common.DisasmOpcode == ACPI_DASM_DEFAULT)
{
/*
* There is an ElseIf but in this case the Else is actually
* a Default block for a Switch/Case statement. No conversion.
*/
AcpiOsPrintf ("%s", "Default");
return;
}
if (OriginalElseOp->Common.DisasmOpcode == ACPI_DASM_CASE)
{
/*
* This ElseIf is actually a Case block for a Switch/Case
* statement. Print Case but do not return so that we can
* promote the subtree and keep the indentation level.
*/
AcpiOsPrintf ("%s", "Case");
}
else
{
/* Emit ElseIf, mark the IF as now an ELSEIF */
AcpiOsPrintf ("%s", "ElseIf");
}
IfOp->Common.DisasmFlags |= ACPI_PARSEOP_ELSEIF;
/* The IF parent will now be the same as the original ELSE parent */
IfOp->Common.Parent = OriginalElseOp->Common.Parent;
/*
* Update the NEXT pointers to restructure the parse tree, essentially
* promoting an If..Else block up to the same level as the original
* Else.
*
* Check if the IF has a corresponding ELSE peer
*/
ElseOp = IfOp->Common.Next;
if (ElseOp &&
(ElseOp->Common.AmlOpcode == AML_ELSE_OP))
{
/* If an ELSE matches the IF, promote it also */
ElseOp->Common.Parent = OriginalElseOp->Common.Parent;
/* Promote the entire block under the ElseIf (All Next OPs) */
AcpiDmPromoteSubtree (OriginalElseOp);
}
else
{
/* Otherwise, set the IF NEXT to the original ELSE NEXT */
IfOp->Common.Next = OriginalElseOp->Common.Next;
}
/* Detach the child IF block from the original ELSE */
OriginalElseOp->Common.Value.Arg = NULL;
/* Ignore the original ELSE from now on */
OriginalElseOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
OriginalElseOp->Common.DisasmOpcode = ACPI_DASM_LNOT_PREFIX;
/* Insert IF (now ELSEIF) as next peer of the original ELSE */
OriginalElseOp->Common.Next = IfOp;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmPromoteSubtree
*
* PARAMETERS: StartOpOp - Original parent of the entire subtree
*
* RETURN: None
*
* DESCRIPTION: Promote an entire parse subtree up one level.
*
******************************************************************************/
static void
AcpiDmPromoteSubtree (
ACPI_PARSE_OBJECT *StartOp)
{
ACPI_PARSE_OBJECT *Op;
ACPI_PARSE_OBJECT *ParentOp;
/* New parent for subtree elements */
ParentOp = StartOp->Common.Parent;
/* First child starts the subtree */
Op = StartOp->Common.Value.Arg;
/* Walk the top-level elements of the subtree */
while (Op)
{
Op->Common.Parent = ParentOp;
if (!Op->Common.Next)
{
/* Last Op in list, update its next field */
Op->Common.Next = StartOp->Common.Next;
break;
}
Op = Op->Common.Next;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsTempName
*
* PARAMETERS: Op - Object to be examined
*
* RETURN: TRUE if object is a temporary (_T_x) name
*
* DESCRIPTION: Determine if an object is a temporary name and ignore it.
* Temporary names are only used for Switch statements. This
* function depends on this restriced usage.
*
******************************************************************************/
BOOLEAN
AcpiDmIsTempName (
ACPI_PARSE_OBJECT *Op)
{
char *Temp;
if (Op->Common.AmlOpcode != AML_NAME_OP)
{
return (FALSE);
}
Temp = (char *)(Op->Common.Aml);
++Temp;
if (strncmp(Temp, "_T_", 3))
{
return (FALSE);
}
/* Ignore Op */
Op->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsSwitchBlock
*
* PARAMETERS: Op - While Object
*
* RETURN: TRUE if While block can be converted to a Switch/Case block
*
* DESCRIPTION: Determines if While block is a Switch/Case statement. Modifies
* parse tree to allow for Switch/Case disassembly during walk.
*
* EXAMPLE: Example of parse tree to be converted
*
* While
* One
* Store
* ByteConst
* -NamePath-
* If
* LEqual
* -NamePath-
* Zero
* Return
* One
* Else
* Return
* WordConst
* Break
*
******************************************************************************/
static BOOLEAN
AcpiDmIsSwitchBlock (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *OneOp;
ACPI_PARSE_OBJECT *StoreOp;
ACPI_PARSE_OBJECT *NamePathOp;
ACPI_PARSE_OBJECT *PredicateOp;
ACPI_PARSE_OBJECT *CurrentOp;
ACPI_PARSE_OBJECT *TempOp;
/* Check for One Op Predicate */
OneOp = AcpiPsGetArg (Op, 0);
if (!OneOp || (OneOp->Common.AmlOpcode != AML_ONE_OP))
{
return (FALSE);
}
/* Check for Store Op */
StoreOp = OneOp->Common.Next;
if (!StoreOp || (StoreOp->Common.AmlOpcode != AML_STORE_OP))
{
return (FALSE);
}
/* Check for Name Op with _T_ string */
NamePathOp = AcpiPsGetArg (StoreOp, 1);
if (!NamePathOp || (NamePathOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP))
{
return (FALSE);
}
if (strncmp((char *)(NamePathOp->Common.Aml), "_T_", 3))
{
return (FALSE);
}
/* This is a Switch/Case control block */
/* Ignore the One Op Predicate */
OneOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
/* Ignore the Store Op, but not the children */
StoreOp->Common.DisasmOpcode = ACPI_DASM_IGNORE_SINGLE;
/*
* First arg of Store Op is the Switch condition.
* Mark it as a Switch predicate and as a parameter list for paren
* closing and correct indentation.
*/
PredicateOp = AcpiPsGetArg (StoreOp, 0);
PredicateOp->Common.DisasmOpcode = ACPI_DASM_SWITCH_PREDICATE;
PredicateOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMETER_LIST;
/* Ignore the Name Op */
NamePathOp->Common.DisasmFlags = ACPI_PARSEOP_IGNORE;
/* Remaining opcodes are the Case statements (If/ElseIf's) */
CurrentOp = StoreOp->Common.Next;
while (AcpiDmIsCaseBlock (CurrentOp))
{
/* Block is a Case structure */
if (CurrentOp->Common.AmlOpcode == AML_ELSE_OP)
{
/* ElseIf */
CurrentOp->Common.DisasmOpcode = ACPI_DASM_CASE;
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
}
/* If */
CurrentOp->Common.DisasmOpcode = ACPI_DASM_CASE;
/*
* Mark the parse tree for Case disassembly. There are two
* types of Case statements. The first type of statement begins with
* an LEqual. The second starts with an LNot and uses a Match statement
* on a Package of constants.
*/
TempOp = AcpiPsGetArg (CurrentOp, 0);
switch (TempOp->Common.AmlOpcode)
{
case (AML_LEQUAL_OP):
/* Ignore just the LEqual Op */
TempOp->Common.DisasmOpcode = ACPI_DASM_IGNORE_SINGLE;
/* Ignore the NamePath Op */
TempOp = AcpiPsGetArg (TempOp, 0);
TempOp->Common.DisasmFlags = ACPI_PARSEOP_IGNORE;
/*
* Second arg of LEqual will be the Case predicate.
* Mark it as a predicate and also as a parameter list for paren
* closing and correct indentation.
*/
PredicateOp = TempOp->Common.Next;
PredicateOp->Common.DisasmOpcode = ACPI_DASM_SWITCH_PREDICATE;
PredicateOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMETER_LIST;
break;
case (AML_LNOT_OP):
/*
* The Package will be the predicate of the Case statement.
* It's under:
* LNOT
* LEQUAL
* MATCH
* PACKAGE
*/
/* Get the LEqual Op from LNot */
TempOp = AcpiPsGetArg (TempOp, 0);
/* Get the Match Op from LEqual */
TempOp = AcpiPsGetArg (TempOp, 0);
/* Get the Package Op from Match */
PredicateOp = AcpiPsGetArg (TempOp, 0);
/* Mark as parameter list for paren closing */
PredicateOp->Common.DisasmFlags |= ACPI_PARSEOP_PARAMETER_LIST;
/*
* The Package list would be too deeply indented if we
* chose to simply ignore the all the parent opcodes, so
* we rearrange the parse tree instead.
*/
/*
* Save the second arg of the If/Else Op which is the
* block code of code for this Case statement.
*/
TempOp = AcpiPsGetArg (CurrentOp, 1);
/*
* Move the Package Op to the child (predicate) of the
* Case statement.
*/
CurrentOp->Common.Value.Arg = PredicateOp;
PredicateOp->Common.Parent = CurrentOp;
/* Add the block code */
PredicateOp->Common.Next = TempOp;
break;
default:
/* Should never get here */
break;
}
/* Advance to next Case block */
CurrentOp = CurrentOp->Common.Next;
}
/* If CurrentOp is now an Else, then this is a Default block */
if (CurrentOp && CurrentOp->Common.AmlOpcode == AML_ELSE_OP)
{
CurrentOp->Common.DisasmOpcode = ACPI_DASM_DEFAULT;
}
/*
* From the first If advance to the Break op. It's possible to
* have an Else (Default) op here when there is only one Case
* statement, so check for it.
*/
CurrentOp = StoreOp->Common.Next->Common.Next;
if (CurrentOp->Common.AmlOpcode == AML_ELSE_OP)
{
CurrentOp = CurrentOp->Common.Next;
}
/* Ignore the Break Op */
CurrentOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsCaseBlock
*
* PARAMETERS: Op - Object to test
*
* RETURN: TRUE if Object is beginning of a Case block.
*
* DESCRIPTION: Determines if an Object is the beginning of a Case block for a
* Switch/Case statement. Parse tree must be one of the following
* forms:
*
* Else (Optional)
* If
* LEqual
* -NamePath- _T_x
*
* Else (Optional)
* If
* LNot
* LEqual
* Match
* Package
* ByteConst
* -NamePath- _T_x
*
******************************************************************************/
static BOOLEAN
AcpiDmIsCaseBlock (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *CurrentOp;
if (!Op)
{
return (FALSE);
}
/* Look for an If or ElseIf */
CurrentOp = Op;
if (CurrentOp->Common.AmlOpcode == AML_ELSE_OP)
{
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp)
{
return (FALSE);
}
}
if (!CurrentOp || CurrentOp->Common.AmlOpcode != AML_IF_OP)
{
return (FALSE);
}
/* Child must be LEqual or LNot */
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp)
{
return (FALSE);
}
switch (CurrentOp->Common.AmlOpcode)
{
case (AML_LEQUAL_OP):
/* Next child must be NamePath with string _T_ */
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp || !CurrentOp->Common.Value.Name ||
strncmp(CurrentOp->Common.Value.Name, "_T_", 3))
{
return (FALSE);
}
break;
case (AML_LNOT_OP):
/* Child of LNot must be LEqual op */
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp || (CurrentOp->Common.AmlOpcode != AML_LEQUAL_OP))
{
return (FALSE);
}
/* Child of LNot must be Match op */
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp || (CurrentOp->Common.AmlOpcode != AML_MATCH_OP))
{
return (FALSE);
}
/* First child of Match must be Package op */
CurrentOp = AcpiPsGetArg (CurrentOp, 0);
if (!CurrentOp || (CurrentOp->Common.AmlOpcode != AML_PACKAGE_OP))
{
return (FALSE);
}
/* Third child of Match must be NamePath with string _T_ */
CurrentOp = AcpiPsGetArg (CurrentOp->Common.Parent, 2);
if (!CurrentOp || !CurrentOp->Common.Value.Name ||
strncmp(CurrentOp->Common.Value.Name, "_T_", 3))
{
return (FALSE);
}
break;
default:
return (FALSE);
}
return (TRUE);
}
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