Extent list (version 1)

Figure 1. Format for contents extent list entries

    Field              Field  Off Leng           Description
    Name               Type   set

   IEWBXTL                              Module Extent List, Version 1
   XTLH_BUFFER_ID      Char     0   8   Buffer identifier "IEWBXTL"
   XTLH_BUFFER_LENG    Binary   8   4   Length of the buffer,
                                           including the header
   XTLH_VERSION        Binary  12   1   Version identifier
   *** RESERVED ***    Binary  13   3   Reserved, must be zeros
   XTLH_ENTRY_LENG     Binary  16   4   Length of each entry
   XTLH_ENTRY_COUNT    Binary  20   4   Number of entries in the list
   *** RESERVED ***    Binary  24   8   Reserved, must be zeros
   XTLH_ENTRY_ORIGIN           32       First extent list entry

1  XTL_ENTRY                            Extent List Entry
   XTL_LOAD_POINT      Binary   0   4   Load point address for extent
2  XTL_EXTENT_LENG     Binary   4   4   Length of extent

Note:

Valid for output only. There is normally only one entry. When the binder is invoked under TSO, however, a second entry is provided for the mini-CESD.
The extent length includes the length of the module text plus other binder-related data.