Arguments

 

pagcnt

   OpenVMS usage:longword_unsigned
   type:         longword (unsigned)
   access:       read only
   mechanism:    by value
   Number of pagelets to add to the current end of the program
   or control region. The pagcnt argument is a longword value
   containing this number.

   On Alpha and Integrity server systems, the specified value is
   rounded up to an even multiple of the CPU-specific page size.
 

retadr

   OpenVMS usage:address_range
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference
   Starting and ending process virtual addresses of the pages that
   $EXPREG has actually added. The retadr argument is the address of
   a 2-longword array containing, in order, the starting and ending
   process virtual addresses.
 

acmode

   OpenVMS usage:access_mode
   type:         longword (unsigned)
   access:       read only
   mechanism:    by value
   Access mode to be associated with the newly added pages. The
   acmode argument is a longword containing the access mode.

   The most privileged access mode used is the access mode of the
   caller.

   The newly added pages are given the following protection:
   (1)  read and write access for access modes equal to or more
   privileged than the access mode used in the call, and (2)  no
   access for access modes less privileged than that used in the
   call.
 

region

   OpenVMS usage:longword_unsigned
   type:         longword (unsigned)
   access:       read only
   mechanism:    by value
   Number specifying which program region is to be expanded. The
   region argument is a longword value. A value of 0 (the default)
   specifies that the program region (P0 region) is to be expanded.
   A value of 1 specifies that the control region (P1 region) is to
   be expanded.