diff options
Diffstat (limited to 'elf/dl-close.c')
| -rw-r--r-- | elf/dl-close.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/elf/dl-close.c b/elf/dl-close.c index 253b073367..f2155031e6 100644 --- a/elf/dl-close.c +++ b/elf/dl-close.c @@ -80,7 +80,8 @@ _dl_close (struct link_map *map) /* That was the last reference, and this was a dlopen-loaded object. We can unmap it. */ const ElfW(Phdr) *ph; - const ElfW(Phdr) *eph; + const ElfW(Phdr) *first, *last; + ElfW(Addr) mapstart, mapend; if (imap->l_info[DT_FINI]) /* Call its termination function. */ @@ -100,24 +101,23 @@ _dl_close (struct link_map *map) _dl_global_scope_end[1] = NULL; } - /* Find the first entry specifying a load command. We have - to determine this now since the table itself is also loaded. */ - for (eph = imap->l_phdr; eph < imap->l_phdr + imap->l_phnum; ++eph) - if (eph->p_type == PT_LOAD) - break; - - /* Unmap the segments. */ - for (ph = imap->l_phdr + (imap->l_phnum - 1); ph >= eph; --ph) + /* We can unmap all the maps at once. We just have to determine + the length and the `munmap' call does the rest. */ + first = last = NULL; + for (ph = imap->l_phdr; ph < imap->l_phdr + imap->l_phnum; ++ph) if (ph->p_type == PT_LOAD) { - ElfW(Addr) mapstart = ph->p_vaddr & ~(ph->p_align - 1); - ElfW(Addr) mapend = ((ph->p_vaddr + ph->p_memsz - + ph->p_align - 1) - & ~(ph->p_align - 1)); - __munmap ((caddr_t) (imap->l_addr + mapstart), - mapend - mapstart); + if (first == NULL) + first = ph; + last = ph; } + /* Now we have all the information we need for the unmapping. + See the method used in `_dl_map_object_from_fd'. */ + mapstart = first->p_vaddr & ~(first->p_align - 1); + mapend = last->p_vaddr + last->p_memsz; + __munmap ((caddr_t) (imap->l_addr + mapstart), mapend - mapstart); + /* Finally, unlink the data structure and free it. */ if (imap->l_prev) imap->l_prev->l_next = imap->l_next; |