diff options
Diffstat (limited to 'elf/dynamic-link.h')
| -rw-r--r-- | elf/dynamic-link.h | 81 |
1 files changed, 69 insertions, 12 deletions
diff --git a/elf/dynamic-link.h b/elf/dynamic-link.h index 4a946f8..64b5f78 100644 --- a/elf/dynamic-link.h +++ b/elf/dynamic-link.h @@ -75,14 +75,75 @@ elf_get_dynamic_info (ElfW(Dyn) *dyn, duplicating their code. It cannot be done in a more general function because we must be able to completely inline. */ +/* 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, lazy) \ + do { \ + ElfW(Addr) r_addr, r_size, p_addr, p_size; \ + if ((map)->l_info[DT_##RELOC]) \ + { \ + r_addr = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \ + r_size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \ + if ((map)->l_info[DT_PLTREL] && \ + (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC) \ + { \ + p_addr = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \ + p_size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \ + if (r_addr <= p_addr && r_addr+r_size > p_addr) \ + { \ + ElfW(Addr) r2_addr, r2_size; \ + r2_addr = p_addr+p_size; \ + if (r2_addr < r_addr+r_size) \ + { \ + r2_size = r_addr+r_size - r2_addr; \ + elf_dynamic_do_##reloc ((map), r2_addr, r2_size, 0); \ + } \ + r_size = p_addr - r_addr; \ + } \ + } \ + \ + elf_dynamic_do_##reloc ((map), r_addr, r_size, 0); \ + if (p_addr) \ + elf_dynamic_do_##reloc ((map), p_addr, p_size, (lazy)); \ + } \ + else if ((map)->l_info[DT_PLTREL] && \ + (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC) \ + { \ + p_addr = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \ + p_size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \ + \ + elf_dynamic_do_##reloc ((map), p_addr, p_size, (lazy)); \ + } \ + } while (0) +#else +#define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, lazy) \ + do { \ + if ((map)->l_info[DT_##RELOC]) \ + { \ + ElfW(Addr) r_addr, r_size; \ + r_addr = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \ + r_size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \ + elf_dynamic_do_##reloc ((map), r_addr, r_size, 0); \ + } \ + if ((map)->l_info[DT_PLTREL] && \ + (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC) \ + { \ + ElfW(Addr) p_addr, p_size; \ + p_addr = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \ + p_size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \ + elf_dynamic_do_##reloc ((map), p_addr, p_size, (lazy)); \ + } \ + } while (0) +#endif + #if ! ELF_MACHINE_NO_REL #include "do-rel.h" -#define ELF_DYNAMIC_DO_REL(map, lazy) \ - if ((map)->l_info[DT_REL]) \ - elf_dynamic_do_rel ((map), DT_REL, DT_RELSZ, 0); \ - if ((map)->l_info[DT_PLTREL] && \ - (map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL) \ - elf_dynamic_do_rel ((map), DT_JMPREL, DT_PLTRELSZ, (lazy)); +#define ELF_DYNAMIC_DO_REL(map, lazy) \ + _ELF_DYNAMIC_DO_RELOC (REL, rel, map, lazy) #else #define ELF_DYNAMIC_DO_REL(map, lazy) /* Nothing to do. */ #endif @@ -90,12 +151,8 @@ elf_get_dynamic_info (ElfW(Dyn) *dyn, #if ! ELF_MACHINE_NO_RELA #define DO_RELA #include "do-rel.h" -#define ELF_DYNAMIC_DO_RELA(map, lazy) \ - if ((map)->l_info[DT_RELA]) \ - elf_dynamic_do_rela ((map), DT_RELA, DT_RELASZ, 0); \ - if ((map)->l_info[DT_PLTREL] && \ - (map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA) \ - elf_dynamic_do_rela ((map), DT_JMPREL, DT_PLTRELSZ, (lazy)); +#define ELF_DYNAMIC_DO_RELA(map, lazy) \ + _ELF_DYNAMIC_DO_RELOC (RELA, rela, map, lazy) #else #define ELF_DYNAMIC_DO_RELA(map, lazy) /* Nothing to do. */ #endif |