Getting Started with OpenVMS System Management (HP Technologies)

Overview

By Ruth E. Goldenberg

A place for everything and everything in its place.

Isabella Mary Beeton, The Book of Household Management

This appendix describes those system services that affect process-private virtual address space and several related others:

• $CREATE_REGION_64, which assigns characteristics to an area of a given size

• $CRETVA and $CRETVA_64, which create demand zero pages in P0, P1, and P2 space

• $EXPREG and $EXPREG_64, which create demand zero pages at the next available address within a specified virtual address region

• Various create and map section services that create a process-private or global section that maps the blocks of a file or particular pages of physical address space to a portion of process-private address space

• Various create and map section services that create and map memory-resident or Galaxywide global sections

• $MGBLSC, $MGBLSC_64, and $MGBLSC_GPFN_64, which map to an existing global section

• $DELTVA and $DELTVA_64, which delete P0, P1, or P2 pages

• $CNTREG, which deletes the upper end of P0 space or the lower end of P1 space

• $DGBLSC, which marks a global section for deletion when no more processes are mapped to it

• $DELETE_REGION_64, which deletes a given region

• $CREATE_BUFOBJ and $CREATE_BUFOBJ_64, which create a buffer object

• $DELETE_BUFOBJ, which deletes a buffer object

• Services that return information about address space, such as $GET_REGION_ INFO, $GETSECI, and $FIND_GPAGE_64

• $SETSWM, which enables or disables process swapping

• $SETPRT and $SETPRT_64, which change the protection on pages of virtual address space

• $SETFLT and $SETFLT_64, which set the fault-on-execute bit for a page

• $COPY_FOR_PAGE, which reads data from a page with fault-on-read set