1 /* Machine-dependent ELF dynamic relocation inline functions. MIPS version.
2 Copyright (C) 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Kazumoto Kojima <kkojima@info.kanagawa-u.ac.jp>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, write to the Free
19 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 /* FIXME: Profiling of shared libraries is not implemented yet. */
26 #define ELF_MACHINE_NAME "MIPS"
31 #error ENTRY_POINT needs to be defined for MIPS.
38 /* The offset of gp from GOT might be system-dependent. It's set by
39 ld. The same value is also */
40 #define OFFSET_GP_GOT 0x7ff0
42 #ifndef _RTLD_PROLOGUE
43 # define _RTLD_PROLOGUE(entry) \
44 ".globl\t" __STRING(entry) "\n\t" \
45 ".ent\t" __STRING(entry) "\n\t" \
46 ".type\t" __STRING(entry) ", @function\n" \
47 __STRING(entry) ":\n\t"
50 #ifndef _RTLD_EPILOGUE
51 # define _RTLD_EPILOGUE(entry) \
52 ".end\t" __STRING(entry) "\n\t" \
53 ".size\t" __STRING(entry) ", . - " __STRING(entry) "\n\t"
56 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.
57 This only makes sense on MIPS when using PLTs, so choose the
58 PLT relocation (not encountered when not using PLTs). */
59 #define ELF_MACHINE_JMP_SLOT R_MIPS_JUMP_SLOT
60 #define elf_machine_type_class(type) \
61 ((((type) == ELF_MACHINE_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
62 | (((type) == R_MIPS_COPY) * ELF_RTYPE_CLASS_COPY))
64 #define ELF_MACHINE_PLT_REL 1
66 /* Translate a processor specific dynamic tag to the index
68 #define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM)
70 /* If there is a DT_MIPS_RLD_MAP entry in the dynamic section, fill it in
71 with the run-time address of the r_debug structure */
72 #define ELF_MACHINE_DEBUG_SETUP(l,r) \
73 do { if ((l)->l_info[DT_MIPS (RLD_MAP)]) \
74 *(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \
78 /* Return nonzero iff ELF header is compatible with the running host. */
79 static inline int __attribute_used__
80 elf_machine_matches_host (const ElfW(Ehdr) *ehdr)
82 #if _MIPS_SIM == _ABIO32 || _MIPS_SIM == _ABIN32
83 /* Don't link o32 and n32 together. */
84 if (((ehdr->e_flags & EF_MIPS_ABI2) != 0) != (_MIPS_SIM == _ABIN32))
88 switch (ehdr->e_machine)
98 static inline ElfW(Addr) *
99 elf_mips_got_from_gpreg (ElfW(Addr) gpreg)
101 /* FIXME: the offset of gp from GOT may be system-dependent. */
102 return (ElfW(Addr) *) (gpreg - OFFSET_GP_GOT);
105 /* Return the link-time address of _DYNAMIC. Conveniently, this is the
106 first element of the GOT. This must be inlined in a function which
107 uses global data. We assume its $gp points to the primary GOT. */
108 static inline ElfW(Addr)
109 elf_machine_dynamic (void)
111 register ElfW(Addr) gp __asm__ ("$28");
112 return *elf_mips_got_from_gpreg (gp);
115 #define STRINGXP(X) __STRING(X)
116 #define STRINGXV(X) STRINGV_(X)
117 #define STRINGV_(...) # __VA_ARGS__
119 /* Return the run-time load address of the shared object. */
120 static inline ElfW(Addr)
121 elf_machine_load_address (void)
124 asm (" .set noreorder\n"
125 " " STRINGXP (PTR_LA) " %0, 0f\n"
128 "0: " STRINGXP (PTR_SUBU) " %0, $31, %0\n"
136 /* The MSB of got[1] of a gnu object is set to identify gnu objects. */
137 #if _MIPS_SIM == _ABI64
138 # define ELF_MIPS_GNU_GOT1_MASK 0x8000000000000000L
140 # define ELF_MIPS_GNU_GOT1_MASK 0x80000000L
143 /* We can't rely on elf_machine_got_rel because _dl_object_relocation_scope
144 fiddles with global data. */
145 #define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info) \
147 struct link_map *map = &bootstrap_map; \
152 got = (ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]); \
154 if (__builtin_expect (map->l_addr == 0, 1)) \
157 /* got[0] is reserved. got[1] is also reserved for the dynamic object \
158 generated by gnu ld. Skip these reserved entries from \
160 i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2 : 1; \
161 n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val; \
163 /* Add the run-time displacement to all local got entries. */ \
165 got[i++] += map->l_addr; \
167 /* Handle global got entries. */ \
169 sym = (ElfW(Sym) *) D_PTR(map, l_info[DT_SYMTAB]) \
170 + map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val; \
171 i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val \
172 - map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val); \
176 if (sym->st_shndx == SHN_UNDEF || sym->st_shndx == SHN_COMMON) \
177 *got = map->l_addr + sym->st_value; \
178 else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC \
179 && *got != sym->st_value) \
180 *got += map->l_addr; \
181 else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION) \
183 if (sym->st_other == 0) \
184 *got += map->l_addr; \
187 *got = map->l_addr + sym->st_value; \
195 /* Mask identifying addresses reserved for the user program,
196 where the dynamic linker should not map anything. */
197 #define ELF_MACHINE_USER_ADDRESS_MASK 0x80000000UL
200 /* Initial entry point code for the dynamic linker.
201 The C function `_dl_start' is the real entry point;
202 its return value is the user program's entry point.
203 Note how we have to be careful about two things:
205 1) That we allocate a minimal stack of 24 bytes for
206 every function call, the MIPS ABI states that even
207 if all arguments are passed in registers the procedure
208 called can use the 16 byte area pointed to by $sp
209 when it is called to store away the arguments passed
212 2) That under Linux the entry is named __start
213 and not just plain _start. */
215 #define RTLD_START asm (\
217 " _RTLD_PROLOGUE(ENTRY_POINT) "\
218 " STRINGXV(SETUP_GPX($25)) "\n\
219 " STRINGXV(SETUP_GPX64($18,$25)) "\n\
220 # i386 ABI book says that the first entry of GOT holds\n\
221 # the address of the dynamic structure. Though MIPS ABI\n\
222 # doesn't say nothing about this, I emulate this here.\n\
223 " STRINGXP(PTR_LA) " $4, _DYNAMIC\n\
224 # Subtract OFFSET_GP_GOT\n\
225 " STRINGXP(PTR_S) " $4, -0x7ff0($28)\n\
227 " STRINGXP(PTR_SUBIU) " $29, 16\n\
229 " STRINGXP(PTR_LA) " $8, .Lcoff\n\
231 .Lcoff: " STRINGXP(PTR_SUBU) " $8, $31, $8\n\
233 " STRINGXP(PTR_LA) " $25, _dl_start\n\
234 " STRINGXP(PTR_ADDU) " $25, $8\n\
237 " STRINGXP(PTR_ADDIU) " $29, 16\n\
238 # Get the value of label '_dl_start_user' in t9 ($25).\n\
239 " STRINGXP(PTR_LA) " $25, _dl_start_user\n\
240 " _RTLD_EPILOGUE(ENTRY_POINT) "\
243 " _RTLD_PROLOGUE(_dl_start_user) "\
244 " STRINGXP(SETUP_GP) "\n\
245 " STRINGXV(SETUP_GP64($18,_dl_start_user)) "\n\
247 # Save the user entry point address in a saved register.\n\
249 # See if we were run as a command with the executable file\n\
250 # name as an extra leading argument.\n\
251 lw $2, _dl_skip_args\n\
253 # Load the original argument count.\n\
254 " STRINGXP(PTR_L) " $4, 0($29)\n\
255 # Subtract _dl_skip_args from it.\n\
257 # Adjust the stack pointer to skip _dl_skip_args words.\n\
258 sll $2, " STRINGXP (PTRLOG) "\n\
259 " STRINGXP(PTR_ADDU) " $29, $2\n\
260 # Save back the modified argument count.\n\
261 " STRINGXP(PTR_S) " $4, 0($29)\n\
262 1: # Call _dl_init (struct link_map *main_map, int argc, char **argv, char **env) \n\
263 " STRINGXP(PTR_L) " $4, _rtld_local\n\
264 " STRINGXP(PTR_L) /* or lw??? fixme */ " $5, 0($29)\n\
265 " STRINGXP(PTR_LA) " $6, " STRINGXP (PTRSIZE) "($29)\n\
266 sll $7, $5, " STRINGXP (PTRLOG) "\n\
267 " STRINGXP(PTR_ADDU) " $7, $7, $6\n\
268 " STRINGXP(PTR_ADDU) " $7, $7, " STRINGXP (PTRSIZE) " \n\
269 # Make sure the stack pointer is aligned for _dl_init_internal.\n\
270 and $2, $29, -2 * " STRINGXP(SZREG) "\n\
271 " STRINGXP(PTR_S) " $29, -" STRINGXP(SZREG) "($2)\n\
272 " STRINGXP(PTR_SUBIU) " $29, $2, 32\n\
273 " STRINGXP(SAVE_GP(16)) "\n\
274 # Call the function to run the initializers.\n\
275 jal _dl_init_internal\n\
276 # Restore the stack pointer for _start.\n\
277 " STRINGXP(PTR_L) " $29, 32-" STRINGXP(SZREG) "($29)\n\
278 # Pass our finalizer function to the user in $2 as per ELF ABI.\n\
279 " STRINGXP(PTR_LA) " $2, _dl_fini\n\
280 # Jump to the user entry point.\n\
283 _RTLD_EPILOGUE(_dl_start_user)\
287 /* Names of the architecture-specific auditing callback functions. */
288 # if _MIPS_SIM == _ABIO32
289 # define ARCH_LA_PLTENTER mips_o32_gnu_pltenter
290 # define ARCH_LA_PLTEXIT mips_o32_gnu_pltexit
291 # elif _MIPS_SIM == _ABIN32
292 # define ARCH_LA_PLTENTER mips_n32_gnu_pltenter
293 # define ARCH_LA_PLTEXIT mips_n32_gnu_pltexit
295 # define ARCH_LA_PLTENTER mips_n64_gnu_pltenter
296 # define ARCH_LA_PLTEXIT mips_n64_gnu_pltexit
299 /* For a non-writable PLT, rewrite the .got.plt entry at RELOC_ADDR to
300 point at the symbol with address VALUE. For a writable PLT, rewrite
301 the corresponding PLT entry instead. */
302 static inline ElfW(Addr)
303 elf_machine_fixup_plt (struct link_map *map, lookup_t t,
304 const ElfW(Rel) *reloc,
305 ElfW(Addr) *reloc_addr, ElfW(Addr) value)
307 return *reloc_addr = value;
310 static inline ElfW(Addr)
311 elf_machine_plt_value (struct link_map *map, const ElfW(Rel) *reloc,
317 #endif /* !dl_machine_h */
321 /* Perform a relocation described by R_INFO at the location pointed to
322 by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
323 MAP is the object containing the reloc. */
326 __attribute__ ((always_inline))
327 elf_machine_reloc (struct link_map *map, ElfW(Addr) r_info,
328 const ElfW(Sym) *sym, const struct r_found_version *version,
329 void *reloc_addr, ElfW(Addr) r_addend, int inplace_p)
331 const unsigned long int r_type = ELFW(R_TYPE) (r_info);
332 ElfW(Addr) *addr_field = (ElfW(Addr) *) reloc_addr;
334 #if !defined RTLD_BOOTSTRAP && !defined SHARED
335 /* This is defined in rtld.c, but nowhere in the static libc.a;
336 make the reference weak so static programs can still link. This
337 declaration cannot be done when compiling rtld.c (i.e. #ifdef
338 RTLD_BOOTSTRAP) because rtld.c contains the common defn for
339 _dl_rtld_map, which is incompatible with a weak decl in the same
341 weak_extern (GL(dl_rtld_map));
346 #if defined (USE_TLS) && !defined (RTLD_BOOTSTRAP)
347 # if _MIPS_SIM == _ABI64
348 case R_MIPS_TLS_DTPMOD64:
349 case R_MIPS_TLS_DTPREL64:
350 case R_MIPS_TLS_TPREL64:
352 case R_MIPS_TLS_DTPMOD32:
353 case R_MIPS_TLS_DTPREL32:
354 case R_MIPS_TLS_TPREL32:
357 struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
361 case R_MIPS_TLS_DTPMOD64:
362 case R_MIPS_TLS_DTPMOD32:
364 *addr_field = sym_map->l_tls_modid;
367 case R_MIPS_TLS_DTPREL64:
368 case R_MIPS_TLS_DTPREL32:
372 r_addend = *addr_field;
373 *addr_field = r_addend + TLS_DTPREL_VALUE (sym);
377 case R_MIPS_TLS_TPREL32:
378 case R_MIPS_TLS_TPREL64:
381 CHECK_STATIC_TLS (map, sym_map);
383 r_addend = *addr_field;
384 *addr_field = r_addend + TLS_TPREL_VALUE (sym_map, sym);
393 #if _MIPS_SIM == _ABI64
394 case (R_MIPS_64 << 8) | R_MIPS_REL32:
399 int symidx = ELFW(R_SYM) (r_info);
400 ElfW(Addr) reloc_value;
403 /* Support relocations on mis-aligned offsets. */
404 __builtin_memcpy (&reloc_value, reloc_addr, sizeof (reloc_value));
406 reloc_value = r_addend;
410 const ElfW(Word) gotsym
411 = (const ElfW(Word)) map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
413 if ((ElfW(Word))symidx < gotsym)
415 /* This wouldn't work for a symbol imported from other
416 libraries for which there's no GOT entry, but MIPS
417 requires every symbol referenced in a dynamic
418 relocation to have a GOT entry in the primary GOT,
419 so we only get here for locally-defined symbols.
420 For section symbols, we should *NOT* be adding
421 sym->st_value (per the definition of the meaning of
422 S in reloc expressions in the ELF64 MIPS ABI),
423 since it should have already been added to
424 reloc_value by the linker, but older versions of
425 GNU ld didn't add it, and newer versions don't emit
426 useless relocations to section symbols any more, so
427 it is safe to keep on adding sym->st_value, even
428 though it's not ABI compliant. Some day we should
429 bite the bullet and stop doing this. */
430 #ifndef RTLD_BOOTSTRAP
431 if (map != &GL(dl_rtld_map))
433 reloc_value += sym->st_value + map->l_addr;
437 #ifndef RTLD_BOOTSTRAP
438 const ElfW(Addr) *got
439 = (const ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]);
440 const ElfW(Word) local_gotno
442 map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
444 reloc_value += got[symidx + local_gotno - gotsym];
449 #ifndef RTLD_BOOTSTRAP
450 if (map != &GL(dl_rtld_map))
452 reloc_value += map->l_addr;
454 __builtin_memcpy (reloc_addr, &reloc_value, sizeof (reloc_value));
457 #ifndef RTLD_BOOTSTRAP
458 #if _MIPS_SIM == _ABI64
459 case (R_MIPS_64 << 8) | R_MIPS_GLOB_DAT:
461 case R_MIPS_GLOB_DAT:
464 int symidx = ELFW(R_SYM) (r_info);
465 const ElfW(Word) gotsym
466 = (const ElfW(Word)) map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
468 if (__builtin_expect ((ElfW(Word)) symidx >= gotsym, 1))
470 const ElfW(Addr) *got
471 = (const ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]);
472 const ElfW(Word) local_gotno
473 = ((const ElfW(Word))
474 map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val);
476 ElfW(Addr) reloc_value = got[symidx + local_gotno - gotsym];
477 __builtin_memcpy (reloc_addr, &reloc_value, sizeof (reloc_value));
482 case R_MIPS_NONE: /* Alright, Wilbur. */
485 case R_MIPS_JUMP_SLOT:
487 struct link_map *sym_map;
490 /* The addend for a jump slot relocation must always be zero:
491 calls via the PLT always branch to the symbol's address and
492 not to the address plus a non-zero offset. */
494 _dl_signal_error (0, map->l_name, NULL,
495 "found jump slot relocation with non-zero addend");
497 sym_map = RESOLVE_MAP (&sym, version, r_type);
498 value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
506 const ElfW(Sym) *const refsym = sym;
507 struct link_map *sym_map;
510 /* Calculate the address of the symbol. */
511 sym_map = RESOLVE_MAP (&sym, version, r_type);
512 value = sym_map == NULL ? 0 : sym_map->l_addr + sym->st_value;
514 if (__builtin_expect (sym == NULL, 0))
515 /* This can happen in trace mode if an object could not be
518 if (__builtin_expect (sym->st_size > refsym->st_size, 0)
519 || (__builtin_expect (sym->st_size < refsym->st_size, 0)
520 && GLRO(dl_verbose)))
524 strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
526 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
527 rtld_progname ?: "<program name unknown>",
528 strtab + refsym->st_name);
530 memcpy (reloc_addr, (void *) value,
531 MIN (sym->st_size, refsym->st_size));
535 #if _MIPS_SIM == _ABI64
537 /* For full compliance with the ELF64 ABI, one must precede the
538 _REL32/_64 pair of relocations with a _64 relocation, such
539 that the in-place addend is read as a 64-bit value. IRIX
540 didn't pick up on this requirement, so we treat the
541 _REL32/_64 relocation as a 64-bit relocation even if it's by
542 itself. For ABI compliance, we ignore such _64 dummy
543 relocations. For RELA, this may be simply removed, since
544 it's totally unnecessary. */
545 if (ELFW(R_SYM) (r_info) == 0)
550 _dl_reloc_bad_type (map, r_type, 0);
555 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
556 MAP is the object containing the reloc. */
559 __attribute__ ((always_inline))
560 elf_machine_rel (struct link_map *map, const ElfW(Rel) *reloc,
561 const ElfW(Sym) *sym, const struct r_found_version *version,
562 void *const reloc_addr)
564 elf_machine_reloc (map, reloc->r_info, sym, version, reloc_addr, 0, 1);
568 __attribute__((always_inline))
569 elf_machine_rel_relative (ElfW(Addr) l_addr, const ElfW(Rel) *reloc,
570 void *const reloc_addr)
572 /* XXX Nothing to do. There is no relative relocation, right? */
576 __attribute__((always_inline))
577 elf_machine_lazy_rel (struct link_map *map,
578 ElfW(Addr) l_addr, const ElfW(Rel) *reloc)
580 ElfW(Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
581 const unsigned int r_type = ELFW(R_TYPE) (reloc->r_info);
582 /* Check for unexpected PLT reloc type. */
583 if (__builtin_expect (r_type == R_MIPS_JUMP_SLOT, 1))
585 if (__builtin_expect (map->l_mach.plt, 0) == 0)
587 /* Nothing is required here since we only support lazy
588 relocation in executables. */
591 *reloc_addr = map->l_mach.plt;
594 _dl_reloc_bad_type (map, r_type, 1);
598 __attribute__ ((always_inline))
599 elf_machine_rela (struct link_map *map, const ElfW(Rela) *reloc,
600 const ElfW(Sym) *sym, const struct r_found_version *version,
601 void *const reloc_addr)
603 elf_machine_reloc (map, reloc->r_info, sym, version, reloc_addr,
608 __attribute__((always_inline))
609 elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc,
610 void *const reloc_addr)
614 #ifndef RTLD_BOOTSTRAP
617 __attribute__((always_inline))
618 elf_machine_got_rel (struct link_map *map, int lazy)
622 const ElfW(Half) *vernum;
625 #define RESOLVE_GOTSYM(sym,vernum,sym_index,reloc) \
627 const ElfW(Sym) *ref = sym; \
628 const struct r_found_version *version \
629 = vernum ? &map->l_versions[vernum[sym_index] & 0x7fff] : NULL; \
630 struct link_map *sym_map; \
631 sym_map = RESOLVE_MAP (&ref, version, reloc); \
632 ref ? sym_map->l_addr + ref->st_value : 0; \
635 if (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL)
636 vernum = (const void *) D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]);
640 got = (ElfW(Addr) *) D_PTR (map, l_info[DT_PLTGOT]);
642 n = map->l_info[DT_MIPS (LOCAL_GOTNO)]->d_un.d_val;
643 /* The dynamic linker's local got entries have already been relocated. */
644 if (map != &GL(dl_rtld_map))
646 /* got[0] is reserved. got[1] is also reserved for the dynamic object
647 generated by gnu ld. Skip these reserved entries from relocation. */
648 i = (got[1] & ELF_MIPS_GNU_GOT1_MASK)? 2 : 1;
650 /* Add the run-time displacement to all local got entries if
652 if (__builtin_expect (map->l_addr != 0, 0))
655 got[i++] += map->l_addr;
659 /* Handle global got entries. */
661 /* Keep track of the symbol index. */
662 symidx = map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val;
663 sym = (ElfW(Sym) *) D_PTR (map, l_info[DT_SYMTAB]) + symidx;
664 i = (map->l_info[DT_MIPS (SYMTABNO)]->d_un.d_val
665 - map->l_info[DT_MIPS (GOTSYM)]->d_un.d_val);
667 /* This loop doesn't handle Quickstart. */
670 if (sym->st_shndx == SHN_UNDEF)
672 if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC && sym->st_value
673 && !(sym->st_other & STO_MIPS_PLT))
676 *got = sym->st_value + map->l_addr;
678 /* This is a lazy-binding stub, so we don't need the
679 canonical address. */
680 *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_JUMP_SLOT);
683 *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
685 else if (sym->st_shndx == SHN_COMMON)
686 *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
687 else if (ELFW(ST_TYPE) (sym->st_info) == STT_FUNC
688 && *got != sym->st_value)
693 /* This is a lazy-binding stub, so we don't need the
694 canonical address. */
695 *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_JUMP_SLOT);
697 else if (ELFW(ST_TYPE) (sym->st_info) == STT_SECTION)
699 if (sym->st_other == 0)
703 *got = RESOLVE_GOTSYM (sym, vernum, symidx, R_MIPS_32);
710 #undef RESOLVE_GOTSYM
714 /* Set up the loaded object described by L so its stub function
715 will jump to the on-demand fixup code __dl_runtime_resolve. */
718 __attribute__((always_inline))
719 elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
721 # ifndef RTLD_BOOTSTRAP
723 extern void _dl_runtime_resolve (ElfW(Word));
724 extern void _dl_runtime_pltresolve (void);
725 extern int _dl_mips_gnu_objects;
729 /* The GOT entries for functions have not yet been filled in.
730 Their initial contents will arrange when called to put an
731 offset into the .dynsym section in t8, the return address
732 in t7 and then jump to _GLOBAL_OFFSET_TABLE[0]. */
733 got = (ElfW(Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
735 /* This function will get called to fix up the GOT entry indicated by
736 the register t8, and then jump to the resolved address. */
737 got[0] = (ElfW(Addr)) &_dl_runtime_resolve;
739 /* Store l to _GLOBAL_OFFSET_TABLE[1] for gnu object. The MSB
740 of got[1] of a gnu object is set to identify gnu objects.
741 Where we can store l for non gnu objects? XXX */
742 if ((got[1] & ELF_MIPS_GNU_GOT1_MASK) != 0)
743 got[1] = ((ElfW(Addr)) l | ELF_MIPS_GNU_GOT1_MASK);
745 _dl_mips_gnu_objects = 0;
748 /* Relocate global offset table. */
749 elf_machine_got_rel (l, lazy);
751 /* If using PLTs, fill in the first two entries of .got.plt. */
752 if (l->l_info[DT_JMPREL] && lazy)
755 gotplt = (ElfW(Addr) *) D_PTR (l, l_info[DT_MIPS (PLTGOT)]);
756 /* If a library is prelinked but we have to relocate anyway,
757 we have to be able to undo the prelinking of .got.plt.
758 The prelinker saved the address of .plt for us here. */
760 l->l_mach.plt = gotplt[1] + l->l_addr;
761 gotplt[0] = (ElfW(Addr)) &_dl_runtime_pltresolve;
762 gotplt[1] = (ElfW(Addr)) l;
769 #endif /* RESOLVE_MAP */