/sys$common/syshlp/helplib.hlb MACRO, /MIGRATION, Compiler Directives, .LINKAGE PSECT, Example  *Conan The Librarian (sorry for the slow response - running on an old VAX)

        .LINKAGE_PSECT LINK_001
        .PSECT LINK_000
  LS_START:
        .PSECT LINK_002
  LS_END:

      This code allows a program to use LS_START and LS_END in
      computations to determine the location and size of the linkage
      section (LINK_001) of the routine.