cvs commit: src/sys/vm vm_map.c vm_map.h

[Marcel Moolenaar]

marcel      2003/08/30 14:25:25 PDT

  FreeBSD src repository

  Modified files:
    sys/vm               vm_map.c vm_map.h 
  Log:
  Introduce MAP_ENTRY_GROWS_DOWN and MAP_ENTRY_GROWS_UP to allow for
  growable (stack) entries that not only grow down, but also grow up.
  Have vm_map_growstack() take these flags into account when growing
  an entry.
  
  This is the first step in adding support for upward growable stacks.
  It is a required feature on ia64 to support the register stack (or
  rstack as I like to call it -- it also means reverse stack). We do
  not currently create rstacks, so the upward growing is not exercised
  and the change should be a functional no-op.
  
  Reviewed by: alc
  
  Revision  Changes    Path
  1.307     +147 -83   src/sys/vm/vm_map.c
  1.102     +3 -0      src/sys/vm/vm_map.h