diff options
| author | dyson <dyson@FreeBSD.org> | 1997-04-20 17:12:11 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1997-04-20 17:12:11 +0000 |
| commit | 5cd49302ac6813b96afb2a936fd364fa9723d06c (patch) | |
| tree | 5d7946d6c00fdb1d50c8abb76320b17620649997 /sys/fs/procfs | |
| parent | d5d1e4921512f54c8d72b82faea0ce52a42f6e2e (diff) | |
| download | FreeBSD-src-5cd49302ac6813b96afb2a936fd364fa9723d06c.zip FreeBSD-src-5cd49302ac6813b96afb2a936fd364fa9723d06c.tar.gz | |
Fix both a problem with accessing backing objects, and also release
the process map on nonexistant pages.
PR: kern/3327
Submitted by: Tor Egge <Tor.Egge@idi.ntnu.no>
Diffstat (limited to 'sys/fs/procfs')
| -rw-r--r-- | sys/fs/procfs/procfs_mem.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/fs/procfs/procfs_mem.c b/sys/fs/procfs/procfs_mem.c index a354a66..ef049bd 100644 --- a/sys/fs/procfs/procfs_mem.c +++ b/sys/fs/procfs/procfs_mem.c @@ -37,7 +37,7 @@ * * @(#)procfs_mem.c 8.5 (Berkeley) 6/15/94 * - * $Id: procfs_mem.c,v 1.23 1997/02/22 09:40:28 peter Exp $ + * $Id: procfs_mem.c,v 1.24 1997/04/06 02:29:31 dyson Exp $ */ /* @@ -197,6 +197,17 @@ procfs_rwmem(p, uio) } m = vm_page_lookup(object, pindex); + + /* Allow fallback to backing objects if we are reading */ + + while (m == NULL && !writing && object->backing_object) { + + pindex += OFF_TO_IDX(object->backing_object_offset); + object = object->backing_object; + + m = vm_page_lookup(object, pindex); + } + if (m == NULL) { error = EFAULT; @@ -206,6 +217,8 @@ procfs_rwmem(p, uio) */ object = NULL; + vm_map_lookup_done(tmap, out_entry); + break; } |
