diff options
Diffstat (limited to 'sysdeps/mips')
| -rw-r--r-- | sysdeps/mips/dl-machine.h | 120 |
1 files changed, 64 insertions, 56 deletions
diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h index 822d9ab..50e9f64 100644 --- a/sysdeps/mips/dl-machine.h +++ b/sysdeps/mips/dl-machine.h @@ -67,14 +67,13 @@ elf_mips_got_from_gpreg (ElfW(Addr) gpreg) /* FIXME: the offset of gp from GOT may be system-dependent. */ return (ElfW(Addr) *) (gpreg - 0x7ff0); } - /* Return the run-time address of the _GLOBAL_OFFSET_TABLE_. Must be inlined in a function which uses global data. */ static inline ElfW(Addr) * elf_machine_got (void) { - register ElfW(Addr) gpreg asm ("$28"); - return elf_mips_got_from_gpreg (gpreg); + register ElfW(Addr) gp asm ("$28"); + return (ElfW(Addr) *) (gp - 0x7ff0); } @@ -93,56 +92,6 @@ elf_machine_load_address (void) return addr; } -/* Perform the relocation specified by RELOC and SYM (which is fully resolved). - MAP is the object containing the reloc. */ - -static inline void -elf_machine_rel (struct link_map *map, - const ElfW(Rel) *reloc, const ElfW(Sym) *sym, - ElfW(Addr) (*resolve) (const ElfW(Sym) **ref, - ElfW(Addr) reloc_addr, - int noplt)) -{ - ElfW(Addr) *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); - ElfW(Addr) loadbase, undo; - - switch (ELFW(R_TYPE) (reloc->r_info)) - { - case R_MIPS_REL32: - if (ELFW(ST_BIND) (sym->st_info) == STB_LOCAL - && (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION - || ELFW(ST_TYPE) (sym->st_info) == STT_NOTYPE)) - *reloc_addr += map->l_addr; - else - { - 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, (ElfW(Addr)) reloc_addr, 0) : - /* RESOLVE is null during bootstrap relocation. */ - map->l_addr); - *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo; - } - break; - case R_MIPS_NONE: /* Alright, Wilbur. */ - break; - default: - assert (! "unexpected dynamic reloc type"); - break; - } -} - -static inline void -elf_machine_lazy_rel (struct link_map *map, const ElfW(Rel) *reloc) -{ - /* Do nothing. */ -} - /* The MSB of got[1] of a gnu object is set to identify gnu objects. */ #define ELF_MIPS_GNU_GOT1_MASK 0x80000000 @@ -159,7 +108,7 @@ elf_machine_got_rel (struct link_map *map) ElfW(Addr) resolve (const ElfW(Sym) *sym) { - ElfW(Sym) *ref = sym; + const ElfW(Sym) *ref = sym; ElfW(Addr) sym_loadaddr; sym_loadaddr = _dl_lookup_symbol (strtab + sym->st_name, &ref, scope, map->l_name, 0, 1); @@ -304,6 +253,10 @@ elf_machine_runtime_link_map (ElfW(Addr) gpreg) to usual c arguments. */ #define ELF_MACHINE_RUNTIME_TRAMPOLINE \ +/* This is called from assembly stubs below which the compiler can't see. */ \ +static ElfW(Addr) __dl_runtime_resolve (ElfW(Word), ElfW(Word), ElfW(Addr)) \ + __attribute__ ((unused)); \ +\ static ElfW(Addr) \ __dl_runtime_resolve (ElfW(Word) sym_index,\ ElfW(Word) return_address,\ @@ -387,8 +340,6 @@ _dl_runtime_resolve:\n\ where the dynamic linker should not map anything. */ #define ELF_MACHINE_USER_ADDRESS_MASK 0x00000000UL - - /* Initial entry point code for the dynamic linker. The C function `_dl_start' is the real entry point; its return value is the user program's entry point. */ @@ -464,3 +415,60 @@ _dl_start_user:\n\ .end _start\n\ "); +#ifdef RESOLVE + +/* Perform the relocation specified by RELOC and SYM (which is fully resolved). + MAP is the object containing the reloc. */ + +static inline void +elf_machine_rel (struct link_map *map, + const ElfW(Rel) *reloc, const ElfW(Sym) *sym) +{ + ElfW(Addr) *const reloc_addr = (void *) (map->l_addr + reloc->r_offset); + ElfW(Addr) loadbase, undo; + + switch (ELFW(R_TYPE) (reloc->r_info)) + { + case R_MIPS_REL32: + if (ELFW(ST_BIND) (sym->st_info) == STB_LOCAL + && (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION + || ELFW(ST_TYPE) (sym->st_info) == STT_NOTYPE)) + *reloc_addr += map->l_addr; + else + { +#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_extern (_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; + else +#endif + undo = 0; + loadbase = RESOLVE (&sym, (ElfW(Addr)) reloc_addr, 0); + *reloc_addr += (sym ? (loadbase + sym->st_value) : 0) - undo; + } + break; + case R_MIPS_NONE: /* Alright, Wilbur. */ + break; + default: + assert (! "unexpected dynamic reloc type"); + break; + } +} + +static inline void +elf_machine_lazy_rel (struct link_map *map, const ElfW(Rel) *reloc) +{ + /* Do nothing. */ +} + +#endif /* RESOLVE */ |