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| author | Ulrich Drepper <drepper@redhat.com> | 2007-06-19 22:59:48 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2007-06-19 22:59:48 +0000 |
| commit | 9be09e060fcb211d3e53fc93098f57b74df2cb67 (patch) | |
| tree | 4abc7be287b872bf34a7a88453e31d5186e88b1a /elf/dl-open.c | |
| parent | ae1ad3aebbc397212b4bb2eec92ff19f8c1f913a (diff) | |
| download | glibc-9be09e060fcb211d3e53fc93098f57b74df2cb67.zip glibc-9be09e060fcb211d3e53fc93098f57b74df2cb67.tar.gz glibc-9be09e060fcb211d3e53fc93098f57b74df2cb67.tar.bz2 | |
* sysdeps/generic/ldsodefs.h (rtld_global): Reorder some elements
to fill in holes
(rtld_global_ro): Likewise.
2007-06-18 Jakub Jelinek <jakub@redhat.com>
* elf/dl-addr.c (_dl_addr): Skip PT_LOAD checking if l_contiguous.
Move PT_LOAD checking to...
(_dl_addr_inside_object): ... here, new function.
* elf/dl-sym.c (do_sym): If not l_contiguous,
call _dl_addr_inside_object.
* elf/dl-iteratephdr.c (__dl_iterate_phdr): Likewise.
* dlfcn/dlinfo.c (dlinfo_doit): Likewise.
* elf/dl-open.c (dl_open_worker): Likewise.
(_dl_addr_inside_object): New function if IS_IN_rtld.
* elf/dl-load.c (_dl_map_object_from_fd): Set l_contiguous if no
holes are present or are PROT_NONE protected.
* include/link.h (struct link_map): Add l_contiguous field.
* sysdeps/generic/ldsodefs.h (_dl_addr_inside_object): New prototype.
Diffstat (limited to 'elf/dl-open.c')
| -rw-r--r-- | elf/dl-open.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/elf/dl-open.c b/elf/dl-open.c index a043cf6..2000f58 100644 --- a/elf/dl-open.c +++ b/elf/dl-open.c @@ -201,10 +201,10 @@ dl_open_worker (void *a) for (Lmid_t ns = 0; ns < DL_NNS; ++ns) for (l = GL(dl_ns)[ns]._ns_loaded; l != NULL; l = l->l_next) if (caller_dlopen >= (const void *) l->l_map_start - && caller_dlopen < (const void *) l->l_map_end) + && caller_dlopen < (const void *) l->l_map_end + && (l->l_contiguous + || _dl_addr_inside_object (l, (ElfW(Addr)) caller_dlopen))) { - /* There must be exactly one DSO for the range of the virtual - memory. Otherwise something is really broken. */ assert (ns == l->l_ns); call_map = l; goto found_caller; @@ -662,3 +662,21 @@ show_scope (struct link_map *new) } } #endif + +#ifdef IS_IN_rtld +/* Return non-zero if ADDR lies within one of L's segments. */ +int +internal_function +_dl_addr_inside_object (struct link_map *l, const ElfW(Addr) addr) +{ + int n = l->l_phnum; + const ElfW(Addr) reladdr = addr - l->l_addr; + + while (--n >= 0) + if (l->l_phdr[n].p_type == PT_LOAD + && reladdr - l->l_phdr[n].p_vaddr >= 0 + && reladdr - l->l_phdr[n].p_vaddr < l->l_phdr[n].p_memsz) + return 1; + return 0; +} +#endif |