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* sysdeps/generic/ldsodefs.h (rtld_global): Reorder some elements

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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.
This commit is contained in:
Ulrich Drepper
2007-06-19 22:59:48 +00:00
parent ae1ad3aebb
commit 9be09e060f
9 changed files with 93 additions and 41 deletions
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24
elf/dl-open.c
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@ -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