From fcccd51286acbf9c19ac57ab7143e257d58323fd Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Thu, 3 Apr 2014 10:47:14 -0700 Subject: Factor mmap/munmap of PT_LOAD segments out of _dl_map_object_from_fd et al. --- elf/dl-unmap-segments.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 elf/dl-unmap-segments.h (limited to 'elf/dl-unmap-segments.h') diff --git a/elf/dl-unmap-segments.h b/elf/dl-unmap-segments.h new file mode 100644 index 0000000000..ce9c3fecfa --- /dev/null +++ b/elf/dl-unmap-segments.h @@ -0,0 +1,35 @@ +/* Unmap a shared object's segments. Generic version. + Copyright (C) 2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#ifndef _DL_UNMAP_SEGMENTS_H +#define _DL_UNMAP_SEGMENTS_H 1 + +#include +#include + +/* _dl_map_segments ensures that any whole pages in gaps between segments + are filled in with PROT_NONE mappings. So we can just unmap the whole + range in one fell swoop. */ + +static __always_inline void +_dl_unmap_segments (struct link_map *l) +{ + __munmap ((void *) l->l_map_start, l->l_map_end - l->l_map_start); +} + +#endif /* dl-unmap-segments.h */ -- cgit v1.2.3-70-g09d2