diff options
Diffstat (limited to 'sysdeps/i386/dl-machine.h')
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 59 |
1 files changed, 34 insertions, 25 deletions
diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index 406133861d..50e928ce3a 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -79,49 +79,56 @@ elf_machine_rel (struct link_map *map, int noplt)) { Elf32_Addr *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); - Elf32_Addr loadbase, undo; - weak_symbol (_dl_rtld_map); /* Defined in rtld.c, but not in libc.a. */ + Elf32_Addr loadbase; + +#ifdef RTLD_BOOTSTRAP +#define RESOLVE(noplt) map->l_addr +#else +#define RESOLVE(noplt) (*resolve) (&sym, (Elf32_Addr) reloc_addr, noplt) +#endif switch (ELF32_R_TYPE (reloc->r_info)) { case R_386_COPY: - loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0); + loadbase = RESOLVE (0); memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size); break; case R_386_GLOB_DAT: - loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) : - /* RESOLVE is null during bootstrap relocation. */ - map->l_addr); + loadbase = RESOLVE (0); *reloc_addr = sym ? (loadbase + sym->st_value) : 0; break; case R_386_JMP_SLOT: - loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 1) : - /* RESOLVE is null during bootstrap relocation. */ - map->l_addr); + loadbase = RESOLVE (1); *reloc_addr = sym ? (loadbase + sym->st_value) : 0; break; case R_386_32: - if (resolve && map == &_dl_rtld_map) - /* Undo the relocation done here during bootstrapping. Now we will - relocate it anew, possibly using a binding found in the user - program or a loaded library rather than the dynamic linker's - built-in definitions used while loading those libraries. */ - undo = map->l_addr + sym->st_value; - else - undo = 0; - loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) : - /* RESOLVE is null during bootstrap relocation. */ - map->l_addr); - *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo; - break; + { + Elf32_Addr undo = 0; +#ifndef RTLD_BOOTSTRAP + /* This is defined in rtld.c, but nowhere in the static libc.a; + make the reference weak so static programs can still link. This + declaration cannot be done when compiling rtld.c (i.e. #ifdef + RTLD_BOOTSTRAP) because rtld.c contains the common defn for + _dl_rtld_map, which is incompatible with a weak decl in the same + file. */ + weak_symbol (_dl_rtld_map); + if (map == &_dl_rtld_map) + /* Undo the relocation done here during bootstrapping. Now we will + relocate it anew, possibly using a binding found in the user + program or a loaded library rather than the dynamic linker's + built-in definitions used while loading those libraries. */ + undo = map->l_addr + sym->st_value; +#endif + loadbase = RESOLVE (0); + *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo; + break; + } case R_386_RELATIVE: if (!resolve || map != &_dl_rtld_map) /* Already done in rtld itself. */ *reloc_addr += map->l_addr; break; case R_386_PC32: - loadbase = (resolve ? (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0) : - /* RESOLVE is null during bootstrap relocation. */ - map->l_addr); + loadbase = RESOLVE (0); *reloc_addr += ((sym ? (loadbase + sym->st_value) : 0) - (Elf32_Addr) reloc_addr); break; @@ -131,6 +138,8 @@ elf_machine_rel (struct link_map *map, assert (! "unexpected dynamic reloc type"); break; } + +#undef RESOLVE } static inline void |