diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2007-09-10 18:49:46 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2007-09-10 18:49:46 +0000 |
| commit | b3c8c11717dc2654a849620f8f2671da4b4042fd (patch) | |
| tree | 03f29ae358d0dbf5a8ac49aa7b0a310d1b0ad6b1 /sys/arch/sparc/include | |
| parent | f9bdf407d1c2a9694df07c9cf1d03a399b8d3c7e (diff) | |
Introduce a md pmap hook, pmap_remove_holes(), which is supposed to mark
the holes a MMU may have from a given vm_map. This will be automagically
invoked for newly created vmspaces.
On platforms with MMU holes (e.g. sun4, sun4c and vax), this prevents
mmap(2) hints which would end up being in the hole to be accepted as valid,
causing unexpected signals when the process tries to access the hole
(since pmap can not fill the hole anyway).
Unfortunately, the logic mmap() uses to pick a valid address for anonymous
mappings needs work, as it will only try to find an address higher than the
hint, which causes all mmap() with a hint in the hole to fail on vax. This
will be improved later.
Diffstat (limited to 'sys/arch/sparc/include')
| -rw-r--r-- | sys/arch/sparc/include/pmap.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/arch/sparc/include/pmap.h b/sys/arch/sparc/include/pmap.h index 8e0e2a94973..449c5b6eb6e 100644 --- a/sys/arch/sparc/include/pmap.h +++ b/sys/arch/sparc/include/pmap.h @@ -1,4 +1,4 @@ -/* $OpenBSD: pmap.h,v 1.41 2007/06/06 17:15:12 deraadt Exp $ */ +/* $OpenBSD: pmap.h,v 1.42 2007/09/10 18:49:45 miod Exp $ */ /* $NetBSD: pmap.h,v 1.30 1997/08/04 20:00:47 pk Exp $ */ /* @@ -283,6 +283,7 @@ vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); void pmap_reference(pmap_t); void pmap_release(pmap_t); void pmap_remove(pmap_t, vaddr_t, vaddr_t); +void pmap_remove_holes(struct vm_map *); int pmap_page_index(paddr_t); void pmap_virtual_space(vaddr_t *, vaddr_t *); void pmap_redzone(void); |