diff options
Diffstat (limited to 'elf/dl-reloc.c')
| -rw-r--r-- | elf/dl-reloc.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c index e5abba41dd..21d1871c6d 100644 --- a/elf/dl-reloc.c +++ b/elf/dl-reloc.c @@ -1,5 +1,5 @@ /* Relocate a shared object and resolve its references to other loaded objects. - Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc. + Copyright (C) 1995-2002, 2003, 2004 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 @@ -307,6 +307,24 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[], textrels = textrels->next; } + + /* In case we can protect the data now that the relocations are + done, do it. */ + if (l->l_relro_size != 0) + { + ElfW(Addr) start = ((l->l_addr + l->l_relro_addr) + & ~(GL(dl_pagesize) - 1)); + ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size) + & ~(GL(dl_pagesize) - 1)); + + if (start != end + && __mprotect ((void *) start, end - start, PROT_READ) < 0) + { + errstring = N_("\ +cannot apply additional memory protection after relocation"); + goto call_error; + } + } } INTDEF (_dl_relocate_object) |