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Don't issue an error if DT_PLTRELSZ is missing

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A shared object doesn't need PLT if there are no PLT relocations.  It
shouldn't be an error if DT_PLTRELSZ is missing.

	[BZ #18410]
	* elf/dl-reloc.c (_dl_relocate_object): Don't issue an error
	for missing DT_PLTRELSZ.
This commit is contained in:
H.J. Lu
2015-05-22 17:46:42 -07:00
parent 333e1ba4e5
commit 3e058c9d7e
3 changed files with 11 additions and 13 deletions
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14
elf/dl-reloc.c
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@@ -258,21 +258,13 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
ELF_DYNAMIC_RELOCATE (l, lazy, consider_profiling, skip_ifunc);
#ifndef PROF
if (__glibc_unlikely (consider_profiling))
if (__glibc_unlikely (consider_profiling)
&& l->l_info[DT_PLTRELSZ] != NULL)
{
/* Allocate the array which will contain the already found
relocations. If the shared object lacks a PLT (for example
if it only contains lead function) the l_info[DT_PLTRELSZ]
will be NULL. */
if (l->l_info[DT_PLTRELSZ] == NULL)
{
errstring = N_("%s: no PLTREL found in object %s\n");
fatal:
_dl_fatal_printf (errstring,
RTLD_PROGNAME,
l->l_name);
}
size_t sizeofrel = l->l_info[DT_PLTREL]->d_un.d_val == DT_RELA
? sizeof (ElfW(Rela))
: sizeof (ElfW(Rel));
@@ -283,7 +275,7 @@ _dl_relocate_object (struct link_map *l, struct r_scope_elem *scope[],
{
errstring = N_("\
%s: out of memory to store relocation results for %s\n");
goto fatal;
_dl_fatal_printf (errstring, RTLD_PROGNAME, l->l_name);
}
}
#endif