FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/compiler/asllistsup.c

     /******************************************************************************
      *
      * Module Name: asllistsup - Listing file support utilities
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, 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.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * 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.
    *
    * 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 MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * 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 DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/compiler/aslcompiler.h>
   #include "aslcompiler.y.h"
   
   
   #define _COMPONENT          ACPI_COMPILER
           ACPI_MODULE_NAME    ("aslistsup")
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsDumpAscii
    *
    * PARAMETERS:  FileId          - ID of current listing file
    *              Count           - Number of bytes to convert
    *              Buffer          - Buffer of bytes to convert
    *
    * RETURN:      None
    *
    * DESCRIPTION: Convert hex bytes to ascii
    *
    ******************************************************************************/
   
   void
   LsDumpAscii (
       UINT32                  FileId,
       UINT32                  Count,
       UINT8                   *Buffer)
   {
       UINT8                   BufChar;
       UINT32                  i;
   
   
       FlPrintFile (FileId, "    \"");
       for (i = 0; i < Count; i++)
       {
           BufChar = Buffer[i];
           if (isprint (BufChar))
           {
               FlPrintFile (FileId, "%c", BufChar);
           }
           else
           {
               /* Not a printable character, just put out a dot */
   
               FlPrintFile (FileId, ".");
           }
       }
   
       FlPrintFile (FileId, "\"");
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsDumpAsciiInComment
    *
    * PARAMETERS:  FileId          - ID of current listing file
    *              Count           - Number of bytes to convert
    *              Buffer          - Buffer of bytes to convert
    *
    * RETURN:      None
    *
    * DESCRIPTION: Convert hex bytes to ascii
    *
    ******************************************************************************/
   
   void
   LsDumpAsciiInComment (
       UINT32                  FileId,
       UINT32                  Count,
       UINT8                   *Buffer)
   {
       UINT8                   BufChar = 0;
       UINT8                   LastChar;
       UINT32                  i;
   
   
       FlPrintFile (FileId, "    \"");
       for (i = 0; i < Count; i++)
       {
           LastChar = BufChar;
           BufChar = Buffer[i];
   
           if (isprint (BufChar))
           {
               /* Handle embedded C comment sequences */
   
               if (((LastChar == '*') && (BufChar == '/')) ||
                   ((LastChar == '/') && (BufChar == '*')))
               {
                   /* Insert a space to break the sequence */
   
                   FlPrintFile (FileId, " ");
               }
   
               FlPrintFile (FileId, "%c", BufChar);
           }
           else
           {
               /* Not a printable character, just put out a dot */
   
               FlPrintFile (FileId, ".");
           }
       }
   
       FlPrintFile (FileId, "\"");
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsCheckException
    *
    * PARAMETERS:  LineNumber          - Current logical (cumulative) line #
    *              FileId              - ID of output listing file
    *
    * RETURN:      None
    *
    * DESCRIPTION: Check if there is an exception for this line, and if there is,
    *              put it in the listing immediately. Handles multiple errors
    *              per line. AslGbl_NextError points to the next error in the
    *              sorted (by line #) list of compile errors/warnings.
    *
    ******************************************************************************/
   
   void
   LsCheckException (
       UINT32                  LineNumber,
       UINT32                  FileId)
   {
   
       if ((!AslGbl_NextError) ||
           (LineNumber < AslGbl_NextError->LogicalLineNumber ))
       {
           return;
       }
   
       /* Handle multiple errors per line */
   
       if (FileId == ASL_FILE_LISTING_OUTPUT)
       {
           while (AslGbl_NextError &&
                 (LineNumber >= AslGbl_NextError->LogicalLineNumber))
           {
               AePrintException (FileId, AslGbl_NextError, "\n[****iasl****]\n");
               AslGbl_NextError = AslGbl_NextError->Next;
           }
   
           FlPrintFile (FileId, "\n");
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsWriteListingHexBytes
    *
    * PARAMETERS:  Buffer          - AML code buffer
    *              Length          - Number of AML bytes to write
    *              FileId          - ID of current listing file.
    *
    * RETURN:      None
    *
    * DESCRIPTION: Write the contents of the AML buffer to the listing file via
    *              the listing buffer. The listing buffer is flushed every 16
    *              AML bytes.
    *
    ******************************************************************************/
   
   void
   LsWriteListingHexBytes (
       UINT8                   *Buffer,
       UINT32                  Length,
       UINT32                  FileId)
   {
       UINT32                  i;
   
   
       /* Transfer all requested bytes */
   
       for (i = 0; i < Length; i++)
       {
           /* Print line header when buffer is empty */
   
           if (AslGbl_CurrentHexColumn == 0)
           {
               if (AslGbl_HasIncludeFiles)
               {
                   FlPrintFile (FileId, "%*s", 10, " ");
               }
   
               switch (FileId)
               {
               case ASL_FILE_LISTING_OUTPUT:
   
                   FlPrintFile (FileId, "%8.8X%s", AslGbl_CurrentAmlOffset,
                       ASL_LISTING_LINE_PREFIX);
                   break;
   
               case ASL_FILE_ASM_SOURCE_OUTPUT:
   
                   FlPrintFile (FileId, "    db ");
                   break;
   
               case ASL_FILE_C_SOURCE_OUTPUT:
   
                   FlPrintFile (FileId, "        ");
                   break;
   
               default:
   
                   /* No other types supported */
   
                   return;
               }
           }
   
           /* Transfer AML byte and update counts */
   
           AslGbl_AmlBuffer[AslGbl_CurrentHexColumn] = Buffer[i];
   
           AslGbl_CurrentHexColumn++;
           AslGbl_CurrentAmlOffset++;
   
           /* Flush buffer when it is full */
   
           if (AslGbl_CurrentHexColumn >= HEX_LISTING_LINE_SIZE)
           {
               LsFlushListingBuffer (FileId);
           }
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsWriteSourceLines
    *
    * PARAMETERS:  ToLineNumber            -
    *              ToLogicalLineNumber     - Write up to this source line number
    *              FileId                  - ID of current listing file
    *
    * RETURN:      None
    *
    * DESCRIPTION: Read then write source lines to the listing file until we have
    *              reached the specified logical (cumulative) line number. This
    *              automatically echos out comment blocks and other non-AML
    *              generating text until we get to the actual AML-generating line
    *              of ASL code specified by the logical line number.
    *
    ******************************************************************************/
   
   void
   LsWriteSourceLines (
       UINT32                  ToLineNumber,
       UINT32                  ToLogicalLineNumber,
       UINT32                  FileId)
   {
   
       /* Nothing to do for these file types */
   
       if ((FileId == ASL_FILE_ASM_INCLUDE_OUTPUT) ||
           (FileId == ASL_FILE_C_INCLUDE_OUTPUT))
       {
           return;
       }
   
       AslGbl_CurrentLine = ToLogicalLineNumber;
   
       /* Flush any hex bytes remaining from the last opcode */
   
       LsFlushListingBuffer (FileId);
   
       /* Read lines and write them as long as we are not caught up */
   
       if (AslGbl_SourceLine < AslGbl_CurrentLine)
       {
           /*
            * If we just completed writing some AML hex bytes, output a linefeed
            * to add some whitespace for readability.
            */
           if (AslGbl_HexBytesWereWritten)
           {
               FlPrintFile (FileId, "\n");
               AslGbl_HexBytesWereWritten = FALSE;
           }
   
           if (FileId == ASL_FILE_C_SOURCE_OUTPUT)
           {
               FlPrintFile (FileId, "    /*\n");
           }
   
           /* Write one line at a time until we have reached the target line # */
   
           while ((AslGbl_SourceLine < AslGbl_CurrentLine) &&
                   LsWriteOneSourceLine (FileId))
           { ; }
   
           if (FileId == ASL_FILE_C_SOURCE_OUTPUT)
           {
               FlPrintFile (FileId, "     */");
           }
   
           FlPrintFile (FileId, "\n");
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsWriteOneSourceLine
    *
    * PARAMETERS:  FileId          - ID of current listing file
    *
    * RETURN:      FALSE on EOF (input source file), TRUE otherwise
    *
    * DESCRIPTION: Read one line from the input source file and echo it to the
    *              listing file, prefixed with the line number, and if the source
    *              file contains include files, prefixed with the current filename
    *
    ******************************************************************************/
   
   UINT32
   LsWriteOneSourceLine (
       UINT32                  FileId)
   {
       UINT8                   FileByte;
       UINT32                  Column = 0;
       UINT32                  Index = 16;
       BOOLEAN                 StartOfLine = FALSE;
       BOOLEAN                 ProcessLongLine = FALSE;
   
   
       AslGbl_SourceLine++;
       AslGbl_ListingNode->LineNumber++;
   
       /* Ignore lines that are completely blank (but count the line above) */
   
       if (FlReadFile (ASL_FILE_SOURCE_OUTPUT, &FileByte, 1) != AE_OK)
       {
           return (0);
       }
       if (FileByte == '\n')
       {
           return (1);
       }
   
       /*
        * This is a non-empty line, we will print the entire line with
        * the line number and possibly other prefixes and transforms.
        */
   
       /* Line prefixes for special files, C and ASM output */
   
       if (FileId == ASL_FILE_C_SOURCE_OUTPUT)
       {
           FlPrintFile (FileId, "     *");
       }
       if (FileId == ASL_FILE_ASM_SOURCE_OUTPUT)
       {
           FlPrintFile (FileId, "; ");
       }
   
       if (AslGbl_HasIncludeFiles)
       {
           /*
            * This file contains "include" statements, print the current
            * filename and line number within the current file
            */
           FlPrintFile (FileId, "%12s %5d%s",
               AslGbl_ListingNode->Filename, AslGbl_ListingNode->LineNumber,
               ASL_LISTING_LINE_PREFIX);
       }
       else
       {
           /* No include files, just print the line number */
   
           FlPrintFile (FileId, "%8u%s", AslGbl_SourceLine,
               ASL_LISTING_LINE_PREFIX);
       }
   
       /* Read the rest of this line (up to a newline or EOF) */
   
       do
       {
           if (FileId == ASL_FILE_C_SOURCE_OUTPUT)
           {
               if (FileByte == '/')
               {
                   FileByte = '*';
               }
           }
   
           /* Split long input lines for readability in the listing */
   
           Column++;
           if (Column >= 128)
           {
               if (!ProcessLongLine)
               {
                   if ((FileByte != '}') &&
                       (FileByte != '{'))
                   {
                       goto WriteByte;
                   }
   
                   ProcessLongLine = TRUE;
               }
   
               if (FileByte == '{')
               {
                   FlPrintFile (FileId, "\n%*s{\n", Index, " ");
                   StartOfLine = TRUE;
                   Index += 4;
                   continue;
               }
   
               else if (FileByte == '}')
               {
                   if (!StartOfLine)
                   {
                       FlPrintFile (FileId, "\n");
                   }
   
                   StartOfLine = TRUE;
                   Index -= 4;
                   FlPrintFile (FileId, "%*s}\n", Index, " ");
                   continue;
               }
   
               /* Ignore spaces/tabs at the start of line */
   
               else if ((FileByte == ' ') && StartOfLine)
               {
                   continue;
               }
   
               else if (StartOfLine)
               {
                   StartOfLine = FALSE;
                   FlPrintFile (FileId, "%*s", Index, " ");
               }
   
   WriteByte:
               FlWriteFile (FileId, &FileByte, 1);
               if (FileByte == '\n')
               {
                   /*
                    * This line has been completed.
                    * Check if an error occurred on this source line during the compile.
                    * If so, we print the error message after the source line.
                    */
                   LsCheckException (AslGbl_SourceLine, FileId);
                   return (1);
               }
           }
           else
           {
               FlWriteFile (FileId, &FileByte, 1);
               if (FileByte == '\n')
               {
                   /*
                    * This line has been completed.
                    * Check if an error occurred on this source line during the compile.
                    * If so, we print the error message after the source line.
                    */
                   LsCheckException (AslGbl_SourceLine, FileId);
                   return (1);
               }
           }
   
       } while (FlReadFile (ASL_FILE_SOURCE_OUTPUT, &FileByte, 1) == AE_OK);
   
       /* EOF on the input file was reached */
   
       return (0);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsFlushListingBuffer
    *
    * PARAMETERS:  FileId          - ID of the listing file
    *
    * RETURN:      None
    *
    * DESCRIPTION: Flush out the current contents of the 16-byte hex AML code
    *              buffer. Usually called at the termination of a single line
    *              of source code or when the buffer is full.
    *
    ******************************************************************************/
   
   void
   LsFlushListingBuffer (
       UINT32                  FileId)
   {
       UINT32                  i;
   
   
       if (AslGbl_CurrentHexColumn == 0)
       {
           return;
       }
   
       /* Write the hex bytes */
   
       switch (FileId)
       {
       case ASL_FILE_LISTING_OUTPUT:
   
           for (i = 0; i < AslGbl_CurrentHexColumn; i++)
           {
               FlPrintFile (FileId, "%2.2X ", AslGbl_AmlBuffer[i]);
           }
   
           for (i = 0; i < ((HEX_LISTING_LINE_SIZE - AslGbl_CurrentHexColumn) * 3); i++)
           {
               FlWriteFile (FileId, ".", 1);
           }
   
           /* Write the ASCII character associated with each of the bytes */
   
           LsDumpAscii (FileId, AslGbl_CurrentHexColumn, AslGbl_AmlBuffer);
           break;
   
   
       case ASL_FILE_ASM_SOURCE_OUTPUT:
   
           for (i = 0; i < AslGbl_CurrentHexColumn; i++)
           {
               if (i > 0)
               {
                   FlPrintFile (FileId, ",");
               }
   
               FlPrintFile (FileId, "0%2.2Xh", AslGbl_AmlBuffer[i]);
           }
   
           for (i = 0; i < ((HEX_LISTING_LINE_SIZE - AslGbl_CurrentHexColumn) * 5); i++)
           {
               FlWriteFile (FileId, " ", 1);
           }
   
           FlPrintFile (FileId, "  ;%8.8X",
               AslGbl_CurrentAmlOffset - HEX_LISTING_LINE_SIZE);
   
           /* Write the ASCII character associated with each of the bytes */
   
           LsDumpAscii (FileId, AslGbl_CurrentHexColumn, AslGbl_AmlBuffer);
           break;
   
   
       case ASL_FILE_C_SOURCE_OUTPUT:
   
           for (i = 0; i < AslGbl_CurrentHexColumn; i++)
           {
               FlPrintFile (FileId, "0x%2.2X,", AslGbl_AmlBuffer[i]);
           }
   
           /* Pad hex output with spaces if line is shorter than max line size */
   
           for (i = 0; i < ((HEX_LISTING_LINE_SIZE - AslGbl_CurrentHexColumn) * 5); i++)
           {
               FlWriteFile (FileId, " ", 1);
           }
   
           /* AML offset for the start of the line */
   
           FlPrintFile (FileId, "    /* %8.8X",
               AslGbl_CurrentAmlOffset - AslGbl_CurrentHexColumn);
   
           /* Write the ASCII character associated with each of the bytes */
   
           LsDumpAsciiInComment (FileId, AslGbl_CurrentHexColumn, AslGbl_AmlBuffer);
           FlPrintFile (FileId, " */");
           break;
   
       default:
   
           /* No other types supported */
   
           return;
       }
   
       FlPrintFile (FileId, "\n");
   
       AslGbl_CurrentHexColumn = 0;
       AslGbl_HexBytesWereWritten = TRUE;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsPushNode
    *
    * PARAMETERS:  Filename        - Pointer to the include filename
    *
    * RETURN:      None
    *
    * DESCRIPTION: Push a listing node on the listing/include file stack. This
    *              stack enables tracking of include files (infinitely nested)
    *              and resumption of the listing of the parent file when the
    *              include file is finished.
    *
    ******************************************************************************/
   
   void
   LsPushNode (
       char                    *Filename)
   {
       ASL_LISTING_NODE        *Lnode;
   
   
       /* Create a new node */
   
       Lnode = UtLocalCalloc (sizeof (ASL_LISTING_NODE));
   
       /* Initialize */
   
       Lnode->Filename = Filename;
       Lnode->LineNumber = 0;
   
       /* Link (push) */
   
       Lnode->Next = AslGbl_ListingNode;
       AslGbl_ListingNode = Lnode;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    LsPopNode
    *
    * PARAMETERS:  None
    *
    * RETURN:      List head after current head is popped off
    *
    * DESCRIPTION: Pop the current head of the list, free it, and return the
    *              next node on the stack (the new current node).
    *
    ******************************************************************************/
   
   ASL_LISTING_NODE *
   LsPopNode (
       void)
   {
       ASL_LISTING_NODE        *Lnode;
   
   
       /* Just grab the node at the head of the list */
   
       Lnode = AslGbl_ListingNode;
       if ((!Lnode) ||
           (!Lnode->Next))
       {
           AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, NULL,
               "Could not pop empty listing stack");
           return (AslGbl_ListingNode);
       }
   
       AslGbl_ListingNode = Lnode->Next;
       ACPI_FREE (Lnode);
   
       /* New "Current" node is the new head */
   
       return (AslGbl_ListingNode);
   }

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