diff options
Diffstat (limited to 'elf/dynamic-link.h')
| -rw-r--r-- | elf/dynamic-link.h | 54 |
1 files changed, 7 insertions, 47 deletions
diff --git a/elf/dynamic-link.h b/elf/dynamic-link.h index aa71227..310ad5e 100644 --- a/elf/dynamic-link.h +++ b/elf/dynamic-link.h @@ -251,53 +251,12 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp) /* On some machines, notably SPARC, DT_REL* includes DT_JMPREL in its range. Note that according to the ELF spec, this is completely legal! - But conditionally define things so that on machines we know this will - not happen we do something more optimal. */ -# ifdef ELF_MACHINE_PLTREL_OVERLAP -# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \ - do { \ - struct { ElfW(Addr) start, size; \ - __typeof (((ElfW(Dyn) *) 0)->d_un.d_val) nrelative; int lazy; } \ - ranges[3]; \ - int ranges_index; \ - \ - ranges[0].lazy = ranges[2].lazy = 0; \ - ranges[1].lazy = 1; \ - ranges[0].size = ranges[1].size = ranges[2].size = 0; \ - ranges[0].nrelative = ranges[1].nrelative = ranges[2].nrelative = 0; \ - \ - if ((map)->l_info[DT_##RELOC]) \ - { \ - ranges[0].start = D_PTR ((map), l_info[DT_##RELOC]); \ - ranges[0].size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \ - if (map->l_info[VERSYMIDX (DT_##RELOC##COUNT)] != NULL) \ - ranges[0].nrelative \ - = MIN (map->l_info[VERSYMIDX (DT_##RELOC##COUNT)]->d_un.d_val, \ - ranges[0].size / sizeof (ElfW(reloc))); \ - } \ - \ - if ((do_lazy) \ - && (map)->l_info[DT_PLTREL] \ - && (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \ - { \ - ranges[1].start = D_PTR ((map), l_info[DT_JMPREL]); \ - ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \ - ranges[2].start = ranges[1].start + ranges[1].size; \ - ranges[2].size = ranges[0].start + ranges[0].size - ranges[2].start; \ - ranges[0].size = ranges[1].start - ranges[0].start; \ - } \ - \ - for (ranges_index = 0; ranges_index < 3; ++ranges_index) \ - elf_dynamic_do_##reloc ((map), \ - ranges[ranges_index].start, \ - ranges[ranges_index].size, \ - ranges[ranges_index].nrelative, \ - ranges[ranges_index].lazy, \ - skip_ifunc); \ - } while (0) -# else -# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \ + We are guarenteed that we have one of two situations. Either DT_JMPREL + comes immediately after DT_REL*, or there is overlap and DT_JMPREL + consumes precisely the very end of the DT_REL*. */ + +# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, skip_ifunc, test_rel) \ do { \ struct { ElfW(Addr) start, size; \ __typeof (((ElfW(Dyn) *) 0)->d_un.d_val) nrelative; int lazy; } \ @@ -317,6 +276,8 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp) { \ ElfW(Addr) start = D_PTR ((map), l_info[DT_JMPREL]); \ \ + if (__builtin_expect (ranges[0].size, 1)) \ + ranges[0].size = (start - ranges[0].start); \ if (! ELF_DURING_STARTUP \ && ((do_lazy) \ /* This test does not only detect whether the relocation \ @@ -352,7 +313,6 @@ elf_get_dynamic_info (struct link_map *l, ElfW(Dyn) *temp) skip_ifunc); \ } \ } while (0) -# endif # if ELF_MACHINE_NO_REL || ELF_MACHINE_NO_RELA # define _ELF_CHECK_REL 0 |