acpica/executer/exnames.c

db2bae30SDana Myers/******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * Module Name: exnames - interpreter/scanner name load/execute
db2bae30SDana Myers *
db2bae30SDana Myers *****************************************************************************/
db2bae30SDana Myers
26f3cdf0SGordon Ross/*
*385cc6b4SJerry Jelinek * Copyright (C) 2000 - 2016, Intel Corp.
db2bae30SDana Myers * All rights reserved.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Redistribution and use in source and binary forms, with or without
26f3cdf0SGordon Ross * modification, are permitted provided that the following conditions
26f3cdf0SGordon Ross * are met:
26f3cdf0SGordon Ross * 1. Redistributions of source code must retain the above copyright
26f3cdf0SGordon Ross *    notice, this list of conditions, and the following disclaimer,
26f3cdf0SGordon Ross *    without modification.
26f3cdf0SGordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
26f3cdf0SGordon Ross *    substantially similar to the "NO WARRANTY" disclaimer below
26f3cdf0SGordon Ross *    ("Disclaimer") and any redistribution must be conditioned upon
26f3cdf0SGordon Ross *    including a substantially similar Disclaimer requirement for further
26f3cdf0SGordon Ross *    binary redistribution.
26f3cdf0SGordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
26f3cdf0SGordon Ross *    of any contributors may be used to endorse or promote products derived
26f3cdf0SGordon Ross *    from this software without specific prior written permission.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * Alternatively, this software may be distributed under the terms of the
26f3cdf0SGordon Ross * GNU General Public License ("GPL") version 2 as published by the Free
26f3cdf0SGordon Ross * Software Foundation.
db2bae30SDana Myers *
26f3cdf0SGordon Ross * NO WARRANTY
26f3cdf0SGordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26f3cdf0SGordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26f3cdf0SGordon Ross * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26f3cdf0SGordon Ross * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
26f3cdf0SGordon Ross * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26f3cdf0SGordon Ross * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26f3cdf0SGordon Ross * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26f3cdf0SGordon Ross * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
26f3cdf0SGordon Ross * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26f3cdf0SGordon Ross * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26f3cdf0SGordon Ross * POSSIBILITY OF SUCH DAMAGES.
26f3cdf0SGordon Ross */
db2bae30SDana Myers
db2bae30SDana Myers#include "acpi.h"
aa2aa9a6SDana Myers#include "accommon.h"
db2bae30SDana Myers#include "acinterp.h"
db2bae30SDana Myers#include "amlcode.h"
db2bae30SDana Myers
db2bae30SDana Myers#define _COMPONENT          ACPI_EXECUTER
db2bae30SDana Myers        ACPI_MODULE_NAME    ("exnames")
db2bae30SDana Myers
db2bae30SDana Myers/* Local prototypes */
db2bae30SDana Myers
db2bae30SDana Myersstatic char *
db2bae30SDana MyersAcpiExAllocateNameString (
db2bae30SDana Myers    UINT32                  PrefixCount,
db2bae30SDana Myers    UINT32                  NumNameSegs);
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_STATUS
db2bae30SDana MyersAcpiExNameSegment (
db2bae30SDana Myers    UINT8                   **InAmlAddress,
db2bae30SDana Myers    char                    *NameString);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExAllocateNameString
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  PrefixCount         - Count of parent levels. Special cases:
db2bae30SDana Myers *                                    (-1)==root,  0==none
db2bae30SDana Myers *              NumNameSegs         - count of 4-character name segments
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      A pointer to the allocated string segment. This segment must
db2bae30SDana Myers *              be deleted by the caller.
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Allocate a buffer for a name string. Ensure allocated name
db2bae30SDana Myers *              string is long enough, and set up prefix if any.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic char *
db2bae30SDana MyersAcpiExAllocateNameString (
db2bae30SDana Myers    UINT32                  PrefixCount,
db2bae30SDana Myers    UINT32                  NumNameSegs)
db2bae30SDana Myers{
db2bae30SDana Myers    char                    *TempPtr;
db2bae30SDana Myers    char                    *NameString;
db2bae30SDana Myers    UINT32                   SizeNeeded;
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExAllocateNameString);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Allow room for all \ and ^ prefixes, all segments and a MultiNamePrefix.
db2bae30SDana Myers     * Also, one byte for the null terminator.
db2bae30SDana Myers     * This may actually be somewhat longer than needed.
db2bae30SDana Myers     */
db2bae30SDana Myers    if (PrefixCount == ACPI_UINT32_MAX)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Special case for root */
db2bae30SDana Myers
db2bae30SDana Myers        SizeNeeded = 1 + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
db2bae30SDana Myers    }
db2bae30SDana Myers    else
db2bae30SDana Myers    {
db2bae30SDana Myers        SizeNeeded = PrefixCount + (ACPI_NAME_SIZE * NumNameSegs) + 2 + 1;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Allocate a buffer for the name.
db2bae30SDana Myers     * This buffer must be deleted by the caller!
db2bae30SDana Myers     */
db2bae30SDana Myers    NameString = ACPI_ALLOCATE (SizeNeeded);
db2bae30SDana Myers    if (!NameString)
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO,
26f3cdf0SGordon Ross            "Could not allocate size %u", SizeNeeded));
db2bae30SDana Myers        return_PTR (NULL);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    TempPtr = NameString;
db2bae30SDana Myers
db2bae30SDana Myers    /* Set up Root or Parent prefixes if needed */
db2bae30SDana Myers
db2bae30SDana Myers    if (PrefixCount == ACPI_UINT32_MAX)
db2bae30SDana Myers    {
db2bae30SDana Myers        *TempPtr++ = AML_ROOT_PREFIX;
db2bae30SDana Myers    }
db2bae30SDana Myers    else
db2bae30SDana Myers    {
db2bae30SDana Myers        while (PrefixCount--)
db2bae30SDana Myers        {
db2bae30SDana Myers            *TempPtr++ = AML_PARENT_PREFIX;
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Set up Dual or Multi prefixes if needed */
db2bae30SDana Myers
db2bae30SDana Myers    if (NumNameSegs > 2)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Set up multi prefixes   */
db2bae30SDana Myers
db2bae30SDana Myers        *TempPtr++ = AML_MULTI_NAME_PREFIX_OP;
db2bae30SDana Myers        *TempPtr++ = (char) NumNameSegs;
db2bae30SDana Myers    }
db2bae30SDana Myers    else if (2 == NumNameSegs)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Set up dual prefixes */
db2bae30SDana Myers
db2bae30SDana Myers        *TempPtr++ = AML_DUAL_NAME_PREFIX;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    /*
db2bae30SDana Myers     * Terminate string following prefixes. AcpiExNameSegment() will
db2bae30SDana Myers     * append the segment(s)
db2bae30SDana Myers     */
db2bae30SDana Myers    *TempPtr = 0;
db2bae30SDana Myers
db2bae30SDana Myers    return_PTR (NameString);
db2bae30SDana Myers}
db2bae30SDana Myers
*385cc6b4SJerry Jelinek
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExNameSegment
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  InAmlAddress    - Pointer to the name in the AML code
db2bae30SDana Myers *              NameString      - Where to return the name. The name is appended
db2bae30SDana Myers *                                to any existing string to form a namepath
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Extract an ACPI name (4 bytes) from the AML byte stream
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana Myersstatic ACPI_STATUS
db2bae30SDana MyersAcpiExNameSegment (
db2bae30SDana Myers    UINT8                   **InAmlAddress,
db2bae30SDana Myers    char                    *NameString)
db2bae30SDana Myers{
db2bae30SDana Myers    char                    *AmlAddress = (void *) *InAmlAddress;
db2bae30SDana Myers    ACPI_STATUS             Status = AE_OK;
db2bae30SDana Myers    UINT32                  Index;
db2bae30SDana Myers    char                    CharBuf[5];
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE (ExNameSegment);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /*
*385cc6b4SJerry Jelinek     * If first character is a digit, then we know that we aren't looking
*385cc6b4SJerry Jelinek     * at a valid name segment
db2bae30SDana Myers     */
db2bae30SDana Myers    CharBuf[0] = *AmlAddress;
db2bae30SDana Myers
db2bae30SDana Myers    if ('0' <= CharBuf[0] && CharBuf[0] <= '9')
db2bae30SDana Myers    {
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO, "Invalid leading digit: %c", CharBuf[0]));
db2bae30SDana Myers        return_ACPI_STATUS (AE_CTRL_PENDING);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Bytes from stream:\n"));
db2bae30SDana Myers
db2bae30SDana Myers    for (Index = 0;
*385cc6b4SJerry Jelinek        (Index < ACPI_NAME_SIZE) && (AcpiUtValidNameChar (*AmlAddress, 0));
db2bae30SDana Myers        Index++)
db2bae30SDana Myers    {
db2bae30SDana Myers        CharBuf[Index] = *AmlAddress++;
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "%c\n", CharBuf[Index]));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    /* Valid name segment  */
db2bae30SDana Myers
db2bae30SDana Myers    if (Index == 4)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Found 4 valid characters */
db2bae30SDana Myers
db2bae30SDana Myers        CharBuf[4] = '\0';
db2bae30SDana Myers
db2bae30SDana Myers        if (NameString)
db2bae30SDana Myers        {
*385cc6b4SJerry Jelinek            strcat (NameString, CharBuf);
db2bae30SDana Myers            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
db2bae30SDana Myers                "Appended to - %s\n", NameString));
db2bae30SDana Myers        }
db2bae30SDana Myers        else
db2bae30SDana Myers        {
db2bae30SDana Myers            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
db2bae30SDana Myers                "No Name string - %s\n", CharBuf));
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers    else if (Index == 0)
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
db2bae30SDana Myers         * First character was not a valid name character,
db2bae30SDana Myers         * so we are looking at something other than a name.
db2bae30SDana Myers         */
db2bae30SDana Myers        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
db2bae30SDana Myers            "Leading character is not alpha: %02Xh (not a name)\n",
db2bae30SDana Myers            CharBuf[0]));
db2bae30SDana Myers        Status = AE_CTRL_PENDING;
db2bae30SDana Myers    }
db2bae30SDana Myers    else
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
db2bae30SDana Myers         * Segment started with one or more valid characters, but fewer than
db2bae30SDana Myers         * the required 4
db2bae30SDana Myers         */
db2bae30SDana Myers        Status = AE_AML_BAD_NAME;
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO,
26f3cdf0SGordon Ross            "Bad character 0x%02x in name, at %p",
db2bae30SDana Myers            *AmlAddress, AmlAddress));
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    *InAmlAddress = ACPI_CAST_PTR (UINT8, AmlAddress);
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers/*******************************************************************************
db2bae30SDana Myers *
db2bae30SDana Myers * FUNCTION:    AcpiExGetNameString
db2bae30SDana Myers *
db2bae30SDana Myers * PARAMETERS:  DataType            - Object type to be associated with this
db2bae30SDana Myers *                                    name
db2bae30SDana Myers *              InAmlAddress        - Pointer to the namestring in the AML code
db2bae30SDana Myers *              OutNameString       - Where the namestring is returned
db2bae30SDana Myers *              OutNameLength       - Length of the returned string
db2bae30SDana Myers *
db2bae30SDana Myers * RETURN:      Status, namestring and length
db2bae30SDana Myers *
db2bae30SDana Myers * DESCRIPTION: Extract a full namepath from the AML byte stream,
db2bae30SDana Myers *              including any prefixes.
db2bae30SDana Myers *
db2bae30SDana Myers ******************************************************************************/
db2bae30SDana Myers
db2bae30SDana MyersACPI_STATUS
db2bae30SDana MyersAcpiExGetNameString (
db2bae30SDana Myers    ACPI_OBJECT_TYPE        DataType,
db2bae30SDana Myers    UINT8                   *InAmlAddress,
db2bae30SDana Myers    char                    **OutNameString,
db2bae30SDana Myers    UINT32                  *OutNameLength)
db2bae30SDana Myers{
db2bae30SDana Myers    ACPI_STATUS             Status = AE_OK;
db2bae30SDana Myers    UINT8                   *AmlAddress = InAmlAddress;
db2bae30SDana Myers    char                    *NameString = NULL;
db2bae30SDana Myers    UINT32                  NumSegments;
db2bae30SDana Myers    UINT32                  PrefixCount = 0;
db2bae30SDana Myers    BOOLEAN                 HasPrefix = FALSE;
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    ACPI_FUNCTION_TRACE_PTR (ExGetNameString, AmlAddress);
db2bae30SDana Myers
db2bae30SDana Myers
db2bae30SDana Myers    if (ACPI_TYPE_LOCAL_REGION_FIELD == DataType   ||
db2bae30SDana Myers        ACPI_TYPE_LOCAL_BANK_FIELD == DataType     ||
db2bae30SDana Myers        ACPI_TYPE_LOCAL_INDEX_FIELD == DataType)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Disallow prefixes for types associated with FieldUnit names */
db2bae30SDana Myers
db2bae30SDana Myers        NameString = AcpiExAllocateNameString (0, 1);
db2bae30SDana Myers        if (!NameString)
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AE_NO_MEMORY;
db2bae30SDana Myers        }
db2bae30SDana Myers        else
db2bae30SDana Myers        {
db2bae30SDana Myers            Status = AcpiExNameSegment (&AmlAddress, NameString);
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers    else
db2bae30SDana Myers    {
db2bae30SDana Myers        /*
db2bae30SDana Myers         * DataType is not a field name.
db2bae30SDana Myers         * Examine first character of name for root or parent prefix operators
db2bae30SDana Myers         */
db2bae30SDana Myers        switch (*AmlAddress)
db2bae30SDana Myers        {
db2bae30SDana Myers        case AML_ROOT_PREFIX:
db2bae30SDana Myers
db2bae30SDana Myers            ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "RootPrefix(\\) at %p\n",
db2bae30SDana Myers                AmlAddress));
db2bae30SDana Myers
db2bae30SDana Myers            /*
db2bae30SDana Myers             * Remember that we have a RootPrefix --
db2bae30SDana Myers             * see comment in AcpiExAllocateNameString()
db2bae30SDana Myers             */
db2bae30SDana Myers            AmlAddress++;
db2bae30SDana Myers            PrefixCount = ACPI_UINT32_MAX;
db2bae30SDana Myers            HasPrefix = TRUE;
db2bae30SDana Myers            break;
db2bae30SDana Myers
db2bae30SDana Myers        case AML_PARENT_PREFIX:
db2bae30SDana Myers
db2bae30SDana Myers            /* Increment past possibly multiple parent prefixes */
db2bae30SDana Myers
db2bae30SDana Myers            do
db2bae30SDana Myers            {
db2bae30SDana Myers                ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "ParentPrefix (^) at %p\n",
db2bae30SDana Myers                    AmlAddress));
db2bae30SDana Myers
db2bae30SDana Myers                AmlAddress++;
db2bae30SDana Myers                PrefixCount++;
db2bae30SDana Myers
db2bae30SDana Myers            } while (*AmlAddress == AML_PARENT_PREFIX);
db2bae30SDana Myers
db2bae30SDana Myers            HasPrefix = TRUE;
db2bae30SDana Myers            break;
db2bae30SDana Myers
db2bae30SDana Myers        default:
db2bae30SDana Myers
db2bae30SDana Myers            /* Not a prefix character */
db2bae30SDana Myers
db2bae30SDana Myers            break;
db2bae30SDana Myers        }
db2bae30SDana Myers
db2bae30SDana Myers        /* Examine first character of name for name segment prefix operator */
db2bae30SDana Myers
db2bae30SDana Myers        switch (*AmlAddress)
db2bae30SDana Myers        {
db2bae30SDana Myers        case AML_DUAL_NAME_PREFIX:
db2bae30SDana Myers
db2bae30SDana Myers            ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "DualNamePrefix at %p\n",
db2bae30SDana Myers                AmlAddress));
db2bae30SDana Myers
db2bae30SDana Myers            AmlAddress++;
db2bae30SDana Myers            NameString = AcpiExAllocateNameString (PrefixCount, 2);
db2bae30SDana Myers            if (!NameString)
db2bae30SDana Myers            {
db2bae30SDana Myers                Status = AE_NO_MEMORY;
db2bae30SDana Myers                break;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* Indicate that we processed a prefix */
db2bae30SDana Myers
db2bae30SDana Myers            HasPrefix = TRUE;
db2bae30SDana Myers
db2bae30SDana Myers            Status = AcpiExNameSegment (&AmlAddress, NameString);
db2bae30SDana Myers            if (ACPI_SUCCESS (Status))
db2bae30SDana Myers            {
db2bae30SDana Myers                Status = AcpiExNameSegment (&AmlAddress, NameString);
db2bae30SDana Myers            }
db2bae30SDana Myers            break;
db2bae30SDana Myers
db2bae30SDana Myers        case AML_MULTI_NAME_PREFIX_OP:
db2bae30SDana Myers
db2bae30SDana Myers            ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "MultiNamePrefix at %p\n",
db2bae30SDana Myers                AmlAddress));
db2bae30SDana Myers
db2bae30SDana Myers            /* Fetch count of segments remaining in name path */
db2bae30SDana Myers
db2bae30SDana Myers            AmlAddress++;
db2bae30SDana Myers            NumSegments = *AmlAddress;
db2bae30SDana Myers
*385cc6b4SJerry Jelinek            NameString = AcpiExAllocateNameString (
*385cc6b4SJerry Jelinek                PrefixCount, NumSegments);
db2bae30SDana Myers            if (!NameString)
db2bae30SDana Myers            {
db2bae30SDana Myers                Status = AE_NO_MEMORY;
db2bae30SDana Myers                break;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* Indicate that we processed a prefix */
db2bae30SDana Myers
db2bae30SDana Myers            AmlAddress++;
db2bae30SDana Myers            HasPrefix = TRUE;
db2bae30SDana Myers
db2bae30SDana Myers            while (NumSegments &&
db2bae30SDana Myers                    (Status = AcpiExNameSegment (&AmlAddress, NameString)) ==
db2bae30SDana Myers                        AE_OK)
db2bae30SDana Myers            {
db2bae30SDana Myers                NumSegments--;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            break;
db2bae30SDana Myers
db2bae30SDana Myers        case 0:
db2bae30SDana Myers
db2bae30SDana Myers            /* NullName valid as of 8-12-98 ASL/AML Grammar Update */
db2bae30SDana Myers
db2bae30SDana Myers            if (PrefixCount == ACPI_UINT32_MAX)
db2bae30SDana Myers            {
db2bae30SDana Myers                ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
db2bae30SDana Myers                    "NameSeg is \"\\\" followed by NULL\n"));
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            /* Consume the NULL byte */
db2bae30SDana Myers
db2bae30SDana Myers            AmlAddress++;
db2bae30SDana Myers            NameString = AcpiExAllocateNameString (PrefixCount, 0);
db2bae30SDana Myers            if (!NameString)
db2bae30SDana Myers            {
db2bae30SDana Myers                Status = AE_NO_MEMORY;
db2bae30SDana Myers                break;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            break;
db2bae30SDana Myers
db2bae30SDana Myers        default:
db2bae30SDana Myers
db2bae30SDana Myers            /* Name segment string */
db2bae30SDana Myers
db2bae30SDana Myers            NameString = AcpiExAllocateNameString (PrefixCount, 1);
db2bae30SDana Myers            if (!NameString)
db2bae30SDana Myers            {
db2bae30SDana Myers                Status = AE_NO_MEMORY;
db2bae30SDana Myers                break;
db2bae30SDana Myers            }
db2bae30SDana Myers
db2bae30SDana Myers            Status = AcpiExNameSegment (&AmlAddress, NameString);
db2bae30SDana Myers            break;
db2bae30SDana Myers        }
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    if (AE_CTRL_PENDING == Status && HasPrefix)
db2bae30SDana Myers    {
db2bae30SDana Myers        /* Ran out of segments after processing a prefix */
db2bae30SDana Myers
db2bae30SDana Myers        ACPI_ERROR ((AE_INFO,
db2bae30SDana Myers            "Malformed Name at %p", NameString));
db2bae30SDana Myers        Status = AE_AML_BAD_NAME;
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    if (ACPI_FAILURE (Status))
db2bae30SDana Myers    {
db2bae30SDana Myers        if (NameString)
db2bae30SDana Myers        {
db2bae30SDana Myers            ACPI_FREE (NameString);
db2bae30SDana Myers        }
db2bae30SDana Myers        return_ACPI_STATUS (Status);
db2bae30SDana Myers    }
db2bae30SDana Myers
db2bae30SDana Myers    *OutNameString = NameString;
db2bae30SDana Myers    *OutNameLength = (UINT32) (AmlAddress - InAmlAddress);
db2bae30SDana Myers
db2bae30SDana Myers    return_ACPI_STATUS (Status);
db2bae30SDana Myers}