NAME       : FBLOCK
 DESCRIPTION: EXEC File Execution Control Block
 DSECT      : FBLOCK
 FUNCTION   : FBLOCK contains information used by EXEC2 or
              REXX/VM to run an exec. A pointer to the FBLOCK
              is provided in the PLIST when the appropriate
              interpreter is called to run the exec. FBLOCK
              is found in FBLOCK macro.
              NOTES      :  When an EXEC or XEDIT macro has been
              loaded into storage via the EXECLOAD command and
              the EXEC or XEDIT macro is invoked via a CMSCALL
              on which a FBLOCK is supplied, the high-order bit
              of the FBLOCK address (Word 4 of the Extended
              PLIST) must be set on in order for the usage
              count reported by the EXECMAP command to be
              incremented. A high-order bit of 1 in the address
              of the FBLOCK indicates that the EXEC is in
              storage as a result of an EXECLOAD command.

 FBLOCK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      FBLOCK         EXEC File Execution Control Block
0000    0 Signed       4 * (0)
0000    0 Character    8 FBLNAME        Filename
0008    8 Character    8 FBLTYPE        Filetype
0010   16 Character    2 FBLMODE        Filemode
          00000012       FBLLFI         *-FBLNAME Length of fileid
0012   18 Signed       2 FBLEXTL        Extension block length (words)
0014   20 Address      4 FBLDLS         Descriptor list start
0018   24 Signed       4 FBLDLE         Descriptor list length (bytes)
001C   28 Character    8 FBLPREF        Explicit initial prefix
0024   36 Character    8 FBLENAME       Explicit environment name
002C   44 Address      4 FBLSEXIT       System Exit vector address
0030   48 Signed       4 FBLEUSER       System Exit User Word
          00000034       FBLLENL        *-FBLNAME Length of fblock
                                        (bytes)
          00000007       FBLLEND        (FBLLENL+7)/8 Length of fblock
                                        (dwords)

          
*** FBLOCK - EXEC File Execution Control Block
*
*     +-------------------------------------------------------+
*   0 |                       FBLNAME                         |
*     +-------------------------------------------------------+
*   8 |                       FBLTYPE                         |
*     +-------------+-------------+---------------------------+
*  10 |  FBLMODE    |  FBLEXTL    |          FBLDLS           |
*     +-------------+-------------+---------------------------+
*  18 |          FBLDLE           |         FBLPREF-          |
*     +---------------------------+---------------------------+
*  20 |          -(01C)           |        FBLENAME-          |
*     +---------------------------+---------------------------+
*  28 |          -(024)           |         FBLSEXIT          |
*     +---------------------------+---------------------------+
*  30 |         FBLEUSER          | 34
*     +---------------------------+
*
*** FBLOCK - EXEC File Execution Control Block

 
Symbol         Dspl Value
-------------- ---- -----
FBLDLE         0018
FBLDLS         0014
FBLENAME       0024
FBLEUSER       0030
FBLEXTL        0012
FBLLEND        0030 00000007
FBLLENL        0030 00000034
FBLLFI         0010 00000012
FBLMODE        0010
FBLNAME        0000
FBLPREF        001C
FBLSEXIT       002C
FBLTYPE        0008