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/*******************************************************************************

 *

 * Module Name: dbxface - AML Debugger external interfaces

 *

 ******************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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 (with 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.

 *

 *****************************************************************************/

#include "acpi.h"

#include "accommon.h"

#include "amlcode.h"

#include "acdebug.h"

#include "acdisasm.h"

#ifdef ACPI_DEBUGGER

#define _COMPONENT          ACPI_CA_DEBUGGER

        ACPI_MODULE_NAME    ("dbxface")

/* Local prototypes */

static ACPI_STATUS

AcpiDbStartCommand (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op);

#ifdef ACPI_OBSOLETE_FUNCTIONS

void

AcpiDbMethodEnd (

    ACPI_WALK_STATE         *WalkState);

#endif

/*******************************************************************************

 *

 * FUNCTION:    AcpiDbStartCommand

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - Current executing Op, from AML interpreter

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Enter debugger command loop

 *

 ******************************************************************************/

static ACPI_STATUS

AcpiDbStartCommand (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op)

{

    ACPI_STATUS             Status;

    /* TBD: [Investigate] are there namespace locking issues here? */

    /* AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); */

    /* Go into the command loop and await next user command */

    AcpiGbl_MethodExecuting = TRUE;

    Status = AE_CTRL_TRUE;

    while (Status == AE_CTRL_TRUE)

    {

        if (AcpiGbl_DebuggerConfiguration == DEBUGGER_MULTI_THREADED)

        {

            /* Handshake with the front-end that gets user command lines */

            Status = AcpiUtReleaseMutex (ACPI_MTX_DEBUG_CMD_COMPLETE);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

            Status = AcpiUtAcquireMutex (ACPI_MTX_DEBUG_CMD_READY);

            if (ACPI_FAILURE (Status))

            {

                return (Status);

            }

        }

        else

        {

            /* Single threaded, we must get a command line ourselves */

            /* Force output to console until a command is entered */

            AcpiDbSetOutputDestination (ACPI_DB_CONSOLE_OUTPUT);

            /* Different prompt if method is executing */

            if (!AcpiGbl_MethodExecuting)

            {

                AcpiOsPrintf ("%1c ", ACPI_DEBUGGER_COMMAND_PROMPT);

            }

            else

            {

                AcpiOsPrintf ("%1c ", ACPI_DEBUGGER_EXECUTE_PROMPT);

            }

            /* Get the user input line */

            Status = AcpiOsGetLine (AcpiGbl_DbLineBuf,

                ACPI_DB_LINE_BUFFER_SIZE, NULL);

            if (ACPI_FAILURE (Status))

            {

                ACPI_EXCEPTION ((AE_INFO, Status, "While parsing command line"));

                return (Status);

            }

        }

        Status = AcpiDbCommandDispatch (AcpiGbl_DbLineBuf, WalkState, Op);

    }

    /* AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); */

    return (Status);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDbSingleStep

 *

 * PARAMETERS:  WalkState       - Current walk

 *              Op              - Current executing op (from aml interpreter)

 *              OpcodeClass     - Class of the current AML Opcode

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Called just before execution of an AML opcode.

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDbSingleStep (

    ACPI_WALK_STATE         *WalkState,

    ACPI_PARSE_OBJECT       *Op,

    UINT32                  OpcodeClass)

{

    ACPI_PARSE_OBJECT       *Next;

    ACPI_STATUS             Status = AE_OK;

    UINT32                  OriginalDebugLevel;

    ACPI_PARSE_OBJECT       *DisplayOp;

    ACPI_PARSE_OBJECT       *ParentOp;

    ACPI_FUNCTION_ENTRY ();

    /* Check the abort flag */

    if (AcpiGbl_AbortMethod)

    {

        AcpiGbl_AbortMethod = FALSE;

        return (AE_ABORT_METHOD);

    }

    /* Check for single-step breakpoint */

    if (WalkState->MethodBreakpoint &&

       (WalkState->MethodBreakpoint <= Op->Common.AmlOffset))

    {

        /* Check if the breakpoint has been reached or passed */

        /* Hit the breakpoint, resume single step, reset breakpoint */

        AcpiOsPrintf ("***Break*** at AML offset %X\n", Op->Common.AmlOffset);

        AcpiGbl_CmSingleStep = TRUE;

        AcpiGbl_StepToNextCall = FALSE;

        WalkState->MethodBreakpoint = 0;

    }

    /* Check for user breakpoint (Must be on exact Aml offset) */

    else if (WalkState->UserBreakpoint &&

            (WalkState->UserBreakpoint == Op->Common.AmlOffset))

    {

        AcpiOsPrintf ("***UserBreakpoint*** at AML offset %X\n",

            Op->Common.AmlOffset);

        AcpiGbl_CmSingleStep = TRUE;

        AcpiGbl_StepToNextCall = FALSE;

        WalkState->MethodBreakpoint = 0;

    }

    /*

     * Check if this is an opcode that we are interested in --

     * namely, opcodes that have arguments

     */

    if (Op->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)

    {

        return (AE_OK);

    }

    switch (OpcodeClass)

    {

    case AML_CLASS_UNKNOWN:

    case AML_CLASS_ARGUMENT:    /* constants, literals, etc.  do nothing */

        return (AE_OK);

    default:

        /* All other opcodes -- continue */

        break;

    }

    /*

     * Under certain debug conditions, display this opcode and its operands

     */

    if ((AcpiGbl_DbOutputToFile)            ||

        (AcpiGbl_CmSingleStep)              ||

        (AcpiDbgLevel & ACPI_LV_PARSE))

    {

        if ((AcpiGbl_DbOutputToFile)        ||

            (AcpiDbgLevel & ACPI_LV_PARSE))

        {

            AcpiOsPrintf ("\n[AmlDebug] Next AML Opcode to execute:\n");

        }

        /*

         * Display this op (and only this op - zero out the NEXT field

         * temporarily, and disable parser trace output for the duration of

         * the display because we don't want the extraneous debug output)

         */

        OriginalDebugLevel = AcpiDbgLevel;

        AcpiDbgLevel &= ~(ACPI_LV_PARSE | ACPI_LV_FUNCTIONS);

        Next = Op->Common.Next;

        Op->Common.Next = NULL;

        DisplayOp = Op;

        ParentOp = Op->Common.Parent;

        if (ParentOp)

        {

            if ((WalkState->ControlState) &&

                (WalkState->ControlState->Common.State ==

                    ACPI_CONTROL_PREDICATE_EXECUTING))

            {

                /*

                 * We are executing the predicate of an IF or WHILE statement

                 * Search upwards for the containing IF or WHILE so that the

                 * entire predicate can be displayed.

                 */

                while (ParentOp)

                {

                    if ((ParentOp->Common.AmlOpcode == AML_IF_OP) ||

                        (ParentOp->Common.AmlOpcode == AML_WHILE_OP))

                    {

                        DisplayOp = ParentOp;

                        break;

                    }

                    ParentOp = ParentOp->Common.Parent;

                }

            }

            else

            {

                while (ParentOp)

                {

                    if ((ParentOp->Common.AmlOpcode == AML_IF_OP)     ||

                        (ParentOp->Common.AmlOpcode == AML_ELSE_OP)   ||

                        (ParentOp->Common.AmlOpcode == AML_SCOPE_OP)  ||

                        (ParentOp->Common.AmlOpcode == AML_METHOD_OP) ||

                        (ParentOp->Common.AmlOpcode == AML_WHILE_OP))

                    {

                        break;

                    }

                    DisplayOp = ParentOp;

                    ParentOp = ParentOp->Common.Parent;

                }

            }

        }

        /* Now we can display it */

        AcpiDmDisassemble (WalkState, DisplayOp, ACPI_UINT32_MAX);

        if ((Op->Common.AmlOpcode == AML_IF_OP) ||

            (Op->Common.AmlOpcode == AML_WHILE_OP))

        {

            if (WalkState->ControlState->Common.Value)

            {

                AcpiOsPrintf ("Predicate = [True], IF block was executed\n");

            }

            else

            {

                AcpiOsPrintf ("Predicate = [False], Skipping IF block\n");

            }

        }

        else if (Op->Common.AmlOpcode == AML_ELSE_OP)

        {

            AcpiOsPrintf ("Predicate = [False], ELSE block was executed\n");

        }

        /* Restore everything */

        Op->Common.Next = Next;

        AcpiOsPrintf ("\n");

        if ((AcpiGbl_DbOutputToFile)        ||

            (AcpiDbgLevel & ACPI_LV_PARSE))

        {

            AcpiOsPrintf ("\n");

        }

        AcpiDbgLevel = OriginalDebugLevel;

    }

    /* If we are not single stepping, just continue executing the method */

    if (!AcpiGbl_CmSingleStep)

    {

        return (AE_OK);

    }

    /*

     * If we are executing a step-to-call command,

     * Check if this is a method call.

     */

    if (AcpiGbl_StepToNextCall)

    {

        if (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP)

        {

            /* Not a method call, just keep executing */

            return (AE_OK);

        }

        /* Found a method call, stop executing */

        AcpiGbl_StepToNextCall = FALSE;

    }

    /*

     * If the next opcode is a method call, we will "step over" it

     * by default.

     */

    if (Op->Common.AmlOpcode == AML_INT_METHODCALL_OP)

    {

        /* Force no more single stepping while executing called method */

        AcpiGbl_CmSingleStep = FALSE;

        /*

         * Set the breakpoint on/before the call, it will stop execution

         * as soon as we return

         */

        WalkState->MethodBreakpoint = 1;  /* Must be non-zero! */

    }

    Status = AcpiDbStartCommand (WalkState, Op);

    /* User commands complete, continue execution of the interrupted method */

    return (Status);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDbInitialize

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Init and start debugger

 *

 ******************************************************************************/

ACPI_STATUS

AcpiDbInitialize (

    void)

{

    ACPI_STATUS             Status;

    /* Init globals */

    AcpiGbl_DbBuffer            = NULL;

    AcpiGbl_DbFilename          = NULL;

    AcpiGbl_DbOutputToFile      = FALSE;

    AcpiGbl_DbDebugLevel        = ACPI_LV_VERBOSITY2;

    AcpiGbl_DbConsoleDebugLevel = ACPI_NORMAL_DEFAULT | ACPI_LV_TABLES;

    AcpiGbl_DbOutputFlags       = ACPI_DB_CONSOLE_OUTPUT;

    AcpiGbl_DbOpt_tables        = FALSE;

    AcpiGbl_DbOpt_disasm        = FALSE;

    AcpiGbl_DbOpt_stats         = FALSE;

    AcpiGbl_DbOpt_verbose       = TRUE;

    AcpiGbl_DbOpt_ini_methods   = TRUE;

    AcpiGbl_DbBuffer = AcpiOsAllocate (ACPI_DEBUG_BUFFER_SIZE);

    if (!AcpiGbl_DbBuffer)

    {

        return (AE_NO_MEMORY);

    }

    ACPI_MEMSET (AcpiGbl_DbBuffer, 0, ACPI_DEBUG_BUFFER_SIZE);

    /* Initial scope is the root */

    AcpiGbl_DbScopeBuf [0] = '\\';

    AcpiGbl_DbScopeBuf [1] =  0;

    AcpiGbl_DbScopeNode = AcpiGbl_RootNode;

    /*

     * If configured for multi-thread support, the debug executor runs in

     * a separate thread so that the front end can be in another address

     * space, environment, or even another machine.

     */

    if (AcpiGbl_DebuggerConfiguration & DEBUGGER_MULTI_THREADED)

    {

        /* These were created with one unit, grab it */

        Status = AcpiUtAcquireMutex (ACPI_MTX_DEBUG_CMD_COMPLETE);

        if (ACPI_FAILURE (Status))

        {

            AcpiOsPrintf ("Could not get debugger mutex\n");

            return (Status);

        }

        Status = AcpiUtAcquireMutex (ACPI_MTX_DEBUG_CMD_READY);

        if (ACPI_FAILURE (Status))

        {

            AcpiOsPrintf ("Could not get debugger mutex\n");

            return (Status);

        }

        /* Create the debug execution thread to execute commands */

        Status = AcpiOsExecute (OSL_DEBUGGER_THREAD, AcpiDbExecuteThread, NULL);

        if (ACPI_FAILURE (Status))

        {

            AcpiOsPrintf ("Could not start debugger thread\n");

            return (Status);

        }

    }

    if (!AcpiGbl_DbOpt_verbose)

    {

        AcpiGbl_DbOpt_disasm = TRUE;

        AcpiGbl_DbOpt_stats = FALSE;

    }

    return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiDbTerminate

 *

 * PARAMETERS:  None

 *

 * RETURN:      None

 *

 * DESCRIPTION: Stop debugger

 *

 ******************************************************************************/

void

AcpiDbTerminate (

    void)

{

    if (AcpiGbl_DbBuffer)

    {

        AcpiOsFree (AcpiGbl_DbBuffer);

    }

}

#ifdef ACPI_OBSOLETE_FUNCTIONS

/*******************************************************************************

 *

 * FUNCTION:    AcpiDbMethodEnd

 *

 * PARAMETERS:  WalkState       - Current walk

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Called at method termination

 *

 ******************************************************************************/

void

AcpiDbMethodEnd (

    ACPI_WALK_STATE         *WalkState)

{

    if (!AcpiGbl_CmSingleStep)

    {

        return;

    }

    AcpiOsPrintf ("\n");

    AcpiDbStartCommand (WalkState, NULL);

}

#endif

#endif /* ACPI_DEBUGGER */