1 /* Machine-dependent ELF dynamic relocation inline functions. i386 version.
2 Copyright (C) 1995-2012 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
22 #define ELF_MACHINE_NAME "i386"
24 #include <sys/param.h>
27 #include <dl-tlsdesc.h>
29 /* Return nonzero iff ELF header is compatible with the running host. */
30 static inline int __attribute__ ((unused
))
31 elf_machine_matches_host (const Elf32_Ehdr
*ehdr
)
33 return ehdr
->e_machine
== EM_386
;
37 #ifdef PI_STATIC_AND_HIDDEN
39 /* Return the link-time address of _DYNAMIC. Conveniently, this is the
40 first element of the GOT, a special entry that is never relocated. */
41 static inline Elf32_Addr
__attribute__ ((unused
, const))
42 elf_machine_dynamic (void)
44 /* This produces a GOTOFF reloc that resolves to zero at link time, so in
45 fact just loads from the GOT register directly. By doing it without
46 an asm we can let the compiler choose any register. */
47 extern const Elf32_Addr _GLOBAL_OFFSET_TABLE_
[] attribute_hidden
;
48 return _GLOBAL_OFFSET_TABLE_
[0];
51 /* Return the run-time load address of the shared object. */
52 static inline Elf32_Addr
__attribute__ ((unused
))
53 elf_machine_load_address (void)
55 /* Compute the difference between the runtime address of _DYNAMIC as seen
56 by a GOTOFF reference, and the link-time address found in the special
57 unrelocated first GOT entry. */
58 extern Elf32_Dyn bygotoff
[] asm ("_DYNAMIC") attribute_hidden
;
59 return (Elf32_Addr
) &bygotoff
- elf_machine_dynamic ();
62 #else /* Without .hidden support, we can't compile the code above. */
64 /* Return the link-time address of _DYNAMIC. Conveniently, this is the
65 first element of the GOT. This must be inlined in a function which
67 static inline Elf32_Addr
__attribute__ ((unused
))
68 elf_machine_dynamic (void)
70 register Elf32_Addr
*got
asm ("%ebx");
75 /* Return the run-time load address of the shared object. */
76 static inline Elf32_Addr
__attribute__ ((unused
))
77 elf_machine_load_address (void)
79 /* It doesn't matter what variable this is, the reference never makes
80 it to assembly. We need a dummy reference to some global variable
81 via the GOT to make sure the compiler initialized %ebx in time. */
84 asm ("leal _dl_start@GOTOFF(%%ebx), %0\n"
85 "subl _dl_start@GOT(%%ebx), %0"
86 : "=r" (addr
) : "m" (_dl_argc
) : "cc");
93 /* Set up the loaded object described by L so its unrelocated PLT
94 entries will jump to the on-demand fixup code in dl-runtime.c. */
96 static inline int __attribute__ ((unused
, always_inline
))
97 elf_machine_runtime_setup (struct link_map
*l
, int lazy
, int profile
)
100 extern void _dl_runtime_resolve (Elf32_Word
) attribute_hidden
;
101 extern void _dl_runtime_profile (Elf32_Word
) attribute_hidden
;
103 if (l
->l_info
[DT_JMPREL
] && lazy
)
105 /* The GOT entries for functions in the PLT have not yet been filled
106 in. Their initial contents will arrange when called to push an
107 offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
108 and then jump to _GLOBAL_OFFSET_TABLE[2]. */
109 got
= (Elf32_Addr
*) D_PTR (l
, l_info
[DT_PLTGOT
]);
110 /* If a library is prelinked but we have to relocate anyway,
111 we have to be able to undo the prelinking of .got.plt.
112 The prelinker saved us here address of .plt + 0x16. */
115 l
->l_mach
.plt
= got
[1] + l
->l_addr
;
116 l
->l_mach
.gotplt
= (Elf32_Addr
) &got
[3];
118 got
[1] = (Elf32_Addr
) l
; /* Identify this shared object. */
120 /* The got[2] entry contains the address of a function which gets
121 called to get the address of a so far unresolved function and
122 jump to it. The profiling extension of the dynamic linker allows
123 to intercept the calls to collect information. In this case we
124 don't store the address in the GOT so that all future calls also
125 end in this function. */
126 if (__builtin_expect (profile
, 0))
128 got
[2] = (Elf32_Addr
) &_dl_runtime_profile
;
130 if (GLRO(dl_profile
) != NULL
131 && _dl_name_match_p (GLRO(dl_profile
), l
))
132 /* This is the object we are looking for. Say that we really
133 want profiling and the timers are started. */
134 GL(dl_profile_map
) = l
;
137 /* This function will get called to fix up the GOT entry indicated by
138 the offset on the stack, and then jump to the resolved address. */
139 got
[2] = (Elf32_Addr
) &_dl_runtime_resolve
;
147 # if !defined PROF && !__BOUNDED_POINTERS__
148 /* We add a declaration of this function here so that in dl-runtime.c
149 the ELF_MACHINE_RUNTIME_TRAMPOLINE macro really can pass the parameters
152 We cannot use this scheme for profiling because the _mcount call
153 destroys the passed register information. */
154 /* GKM FIXME: Fix trampoline to pass bounds so we can do
155 without the `__unbounded' qualifier. */
156 #define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), stdcall, unused))
158 extern ElfW(Addr
) _dl_fixup (struct link_map
*__unbounded l
,
159 ElfW(Word
) reloc_offset
)
160 ARCH_FIXUP_ATTRIBUTE
;
161 extern ElfW(Addr
) _dl_profile_fixup (struct link_map
*l
,
162 ElfW(Word
) reloc_offset
,
163 ElfW(Addr
) retaddr
, void *regs
,
164 long int *framesizep
)
165 ARCH_FIXUP_ATTRIBUTE
;
170 /* Mask identifying addresses reserved for the user program,
171 where the dynamic linker should not map anything. */
172 #define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL
174 /* Initial entry point code for the dynamic linker.
175 The C function `_dl_start' is the real entry point;
176 its return value is the user program's entry point. */
178 #define RTLD_START asm ("\n\
181 0: movl (%esp), %ebx\n\
185 .globl _dl_start_user\n\
187 # Note that _dl_start gets the parameter in %eax.\n\
191 # Save the user entry point address in %edi.\n\
193 # Point %ebx at the GOT.\n\
195 addl $_GLOBAL_OFFSET_TABLE_, %ebx\n\
196 # See if we were run as a command with the executable file\n\
197 # name as an extra leading argument.\n\
198 movl _dl_skip_args@GOTOFF(%ebx), %eax\n\
199 # Pop the original argument count.\n\
201 # Adjust the stack pointer to skip _dl_skip_args words.\n\
202 leal (%esp,%eax,4), %esp\n\
203 # Subtract _dl_skip_args from argc.\n\
205 # Push argc back on the stack.\n\
207 # The special initializer gets called with the stack just\n\
208 # as the application's entry point will see it; it can\n\
209 # switch stacks if it moves these contents over.\n\
210 " RTLD_START_SPECIAL_INIT "\n\
211 # Load the parameters again.\n\
212 # (eax, edx, ecx, *--esp) = (_dl_loaded, argc, argv, envp)\n\
213 movl _rtld_local@GOTOFF(%ebx), %eax\n\
214 leal 8(%esp,%edx,4), %esi\n\
215 leal 4(%esp), %ecx\n\
217 # Make sure _dl_init is run with 16 byte aligned stack.\n\
223 # Clear %ebp, so that even constructors have terminated backchain.\n\
225 # Call the function to run the initializers.\n\
226 call _dl_init_internal@PLT\n\
227 # Pass our finalizer function to the user in %edx, as per ELF ABI.\n\
228 leal _dl_fini@GOTOFF(%ebx), %edx\n\
229 # Restore %esp _start expects.\n\
231 # Jump to the user's entry point.\n\
236 #ifndef RTLD_START_SPECIAL_INIT
237 # define RTLD_START_SPECIAL_INIT /* nothing */
240 /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
241 TLS variable, so undefined references should not be allowed to
243 ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
244 of the main executable's symbols, as for a COPY reloc. */
245 # define elf_machine_type_class(type) \
246 ((((type) == R_386_JMP_SLOT || (type) == R_386_TLS_DTPMOD32 \
247 || (type) == R_386_TLS_DTPOFF32 || (type) == R_386_TLS_TPOFF32 \
248 || (type) == R_386_TLS_TPOFF || (type) == R_386_TLS_DESC) \
249 * ELF_RTYPE_CLASS_PLT) \
250 | (((type) == R_386_COPY) * ELF_RTYPE_CLASS_COPY))
252 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
253 #define ELF_MACHINE_JMP_SLOT R_386_JMP_SLOT
255 /* The i386 never uses Elf32_Rela relocations for the dynamic linker.
256 Prelinked libraries may use Elf32_Rela though. */
257 #define ELF_MACHINE_PLT_REL 1
259 /* We define an initialization functions. This is called very early in
261 #define DL_PLATFORM_INIT dl_platform_init ()
263 static inline void __attribute__ ((unused
))
264 dl_platform_init (void)
266 if (GLRO(dl_platform
) != NULL
&& *GLRO(dl_platform
) == '\0')
267 /* Avoid an empty string which would disturb us. */
268 GLRO(dl_platform
) = NULL
;
271 static inline Elf32_Addr
272 elf_machine_fixup_plt (struct link_map
*map
, lookup_t t
,
273 const Elf32_Rel
*reloc
,
274 Elf32_Addr
*reloc_addr
, Elf32_Addr value
)
276 return *reloc_addr
= value
;
279 /* Return the final value of a plt relocation. */
280 static inline Elf32_Addr
281 elf_machine_plt_value (struct link_map
*map
, const Elf32_Rel
*reloc
,
288 /* Names of the architecture-specific auditing callback functions. */
289 #define ARCH_LA_PLTENTER i86_gnu_pltenter
290 #define ARCH_LA_PLTEXIT i86_gnu_pltexit
292 #endif /* !dl_machine_h */
294 /* The i386 never uses Elf32_Rela relocations for the dynamic linker.
295 Prelinked libraries may use Elf32_Rela though. */
296 #define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP
300 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
301 MAP is the object containing the reloc. */
304 __attribute ((always_inline
))
305 elf_machine_rel (struct link_map
*map
, const Elf32_Rel
*reloc
,
306 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
307 void *const reloc_addr_arg
, int skip_ifunc
)
309 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
310 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
312 # if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
313 if (__builtin_expect (r_type
== R_386_RELATIVE
, 0))
315 # if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
316 /* This is defined in rtld.c, but nowhere in the static libc.a;
317 make the reference weak so static programs can still link.
318 This declaration cannot be done when compiling rtld.c
319 (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
320 common defn for _dl_rtld_map, which is incompatible with a
321 weak decl in the same file. */
323 weak_extern (_dl_rtld_map
);
325 if (map
!= &GL(dl_rtld_map
)) /* Already done in rtld itself. */
327 *reloc_addr
+= map
->l_addr
;
329 # ifndef RTLD_BOOTSTRAP
330 else if (__builtin_expect (r_type
== R_386_NONE
, 0))
334 # endif /* !RTLD_BOOTSTRAP and have no -z combreloc */
336 # ifndef RTLD_BOOTSTRAP
337 const Elf32_Sym
*const refsym
= sym
;
339 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
340 Elf32_Addr value
= sym_map
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
343 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
,
345 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
346 && __builtin_expect (!skip_ifunc
, 1))
347 value
= ((Elf32_Addr (*) (void)) value
) ();
356 case R_386_TLS_DTPMOD32
:
357 # ifdef RTLD_BOOTSTRAP
358 /* During startup the dynamic linker is always the module
360 XXX If this relocation is necessary move before RESOLVE
364 /* Get the information from the link map returned by the
367 *reloc_addr
= sym_map
->l_tls_modid
;
370 case R_386_TLS_DTPOFF32
:
371 # ifndef RTLD_BOOTSTRAP
372 /* During relocation all TLS symbols are defined and used.
373 Therefore the offset is already correct. */
375 *reloc_addr
= sym
->st_value
;
380 struct tlsdesc
volatile *td
=
381 (struct tlsdesc
volatile *)reloc_addr
;
383 # ifndef RTLD_BOOTSTRAP
385 td
->entry
= _dl_tlsdesc_undefweak
;
389 # ifndef RTLD_BOOTSTRAP
391 CHECK_STATIC_TLS (map
, sym_map
);
393 if (!TRY_STATIC_TLS (map
, sym_map
))
395 td
->arg
= _dl_make_tlsdesc_dynamic
396 (sym_map
, sym
->st_value
+ (ElfW(Word
))td
->arg
);
397 td
->entry
= _dl_tlsdesc_dynamic
;
403 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
404 + (ElfW(Word
))td
->arg
);
405 td
->entry
= _dl_tlsdesc_return
;
410 case R_386_TLS_TPOFF32
:
411 /* The offset is positive, backward from the thread pointer. */
412 # ifdef RTLD_BOOTSTRAP
413 *reloc_addr
+= map
->l_tls_offset
- sym
->st_value
;
415 /* We know the offset of object the symbol is contained in.
416 It is a positive value which will be subtracted from the
417 thread pointer. To get the variable position in the TLS
418 block we subtract the offset from that of the TLS block. */
421 CHECK_STATIC_TLS (map
, sym_map
);
422 *reloc_addr
+= sym_map
->l_tls_offset
- sym
->st_value
;
426 case R_386_TLS_TPOFF
:
427 /* The offset is negative, forward from the thread pointer. */
428 # ifdef RTLD_BOOTSTRAP
429 *reloc_addr
+= sym
->st_value
- map
->l_tls_offset
;
431 /* We know the offset of object the symbol is contained in.
432 It is a negative value which will be added to the
436 CHECK_STATIC_TLS (map
, sym_map
);
437 *reloc_addr
+= sym
->st_value
- sym_map
->l_tls_offset
;
442 # ifndef RTLD_BOOTSTRAP
444 *reloc_addr
+= value
;
447 *reloc_addr
+= (value
- (Elf32_Addr
) reloc_addr
);
451 /* This can happen in trace mode if an object could not be
454 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
455 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
456 && GLRO(dl_verbose
)))
460 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
462 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
463 rtld_progname
?: "<program name unknown>",
464 strtab
+ refsym
->st_name
);
466 memcpy (reloc_addr_arg
, (void *) value
,
467 MIN (sym
->st_size
, refsym
->st_size
));
469 case R_386_IRELATIVE
:
470 value
= map
->l_addr
+ *reloc_addr
;
471 value
= ((Elf32_Addr (*) (void)) value
) ();
475 _dl_reloc_bad_type (map
, r_type
, 0);
477 # endif /* !RTLD_BOOTSTRAP */
482 # ifndef RTLD_BOOTSTRAP
484 __attribute__ ((always_inline
))
485 elf_machine_rela (struct link_map
*map
, const Elf32_Rela
*reloc
,
486 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
487 void *const reloc_addr_arg
, int skip_ifunc
)
489 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
490 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
492 if (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
)
493 *reloc_addr
= map
->l_addr
+ reloc
->r_addend
;
494 else if (r_type
!= R_386_NONE
)
496 # ifndef RESOLVE_CONFLICT_FIND_MAP
497 const Elf32_Sym
*const refsym
= sym
;
499 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
500 Elf32_Addr value
= sym
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
503 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
504 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
, 0)
505 && __builtin_expect (!skip_ifunc
, 1))
506 value
= ((Elf32_Addr (*) (void)) value
) ();
508 switch (ELF32_R_TYPE (reloc
->r_info
))
513 *reloc_addr
= value
+ reloc
->r_addend
;
515 # ifndef RESOLVE_CONFLICT_FIND_MAP
516 /* Not needed for dl-conflict.c. */
518 *reloc_addr
= (value
+ reloc
->r_addend
- (Elf32_Addr
) reloc_addr
);
521 case R_386_TLS_DTPMOD32
:
522 /* Get the information from the link map returned by the
525 *reloc_addr
= sym_map
->l_tls_modid
;
527 case R_386_TLS_DTPOFF32
:
528 /* During relocation all TLS symbols are defined and used.
529 Therefore the offset is already correct. */
530 *reloc_addr
= (sym
== NULL
? 0 : sym
->st_value
) + reloc
->r_addend
;
534 struct tlsdesc
volatile *td
=
535 (struct tlsdesc
volatile *)reloc_addr
;
537 # ifndef RTLD_BOOTSTRAP
540 td
->arg
= (void*)reloc
->r_addend
;
541 td
->entry
= _dl_tlsdesc_undefweak
;
546 # ifndef RTLD_BOOTSTRAP
548 CHECK_STATIC_TLS (map
, sym_map
);
550 if (!TRY_STATIC_TLS (map
, sym_map
))
552 td
->arg
= _dl_make_tlsdesc_dynamic
553 (sym_map
, sym
->st_value
+ reloc
->r_addend
);
554 td
->entry
= _dl_tlsdesc_dynamic
;
560 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
562 td
->entry
= _dl_tlsdesc_return
;
567 case R_386_TLS_TPOFF32
:
568 /* The offset is positive, backward from the thread pointer. */
569 /* We know the offset of object the symbol is contained in.
570 It is a positive value which will be subtracted from the
571 thread pointer. To get the variable position in the TLS
572 block we subtract the offset from that of the TLS block. */
575 CHECK_STATIC_TLS (map
, sym_map
);
576 *reloc_addr
= sym_map
->l_tls_offset
- sym
->st_value
580 case R_386_TLS_TPOFF
:
581 /* The offset is negative, forward from the thread pointer. */
582 /* We know the offset of object the symbol is contained in.
583 It is a negative value which will be added to the
587 CHECK_STATIC_TLS (map
, sym_map
);
588 *reloc_addr
= sym
->st_value
- sym_map
->l_tls_offset
594 /* This can happen in trace mode if an object could not be
597 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
598 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
599 && GLRO(dl_verbose
)))
603 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
605 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
606 rtld_progname
?: "<program name unknown>",
607 strtab
+ refsym
->st_name
);
609 memcpy (reloc_addr_arg
, (void *) value
,
610 MIN (sym
->st_size
, refsym
->st_size
));
612 # endif /* !RESOLVE_CONFLICT_FIND_MAP */
613 case R_386_IRELATIVE
:
614 value
= map
->l_addr
+ reloc
->r_addend
;
615 value
= ((Elf32_Addr (*) (void)) value
) ();
619 /* We add these checks in the version to relocate ld.so only
620 if we are still debugging. */
621 _dl_reloc_bad_type (map
, r_type
, 0);
626 # endif /* !RTLD_BOOTSTRAP */
629 __attribute ((always_inline
))
630 elf_machine_rel_relative (Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
631 void *const reloc_addr_arg
)
633 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
634 assert (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
);
635 *reloc_addr
+= l_addr
;
638 # ifndef RTLD_BOOTSTRAP
640 __attribute__ ((always_inline
))
641 elf_machine_rela_relative (Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
642 void *const reloc_addr_arg
)
644 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
645 *reloc_addr
= l_addr
+ reloc
->r_addend
;
647 # endif /* !RTLD_BOOTSTRAP */
650 __attribute__ ((always_inline
))
651 elf_machine_lazy_rel (struct link_map
*map
,
652 Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
655 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
656 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
657 /* Check for unexpected PLT reloc type. */
658 if (__builtin_expect (r_type
== R_386_JMP_SLOT
, 1))
660 if (__builtin_expect (map
->l_mach
.plt
, 0) == 0)
661 *reloc_addr
+= l_addr
;
663 *reloc_addr
= (map
->l_mach
.plt
664 + (((Elf32_Addr
) reloc_addr
) - map
->l_mach
.gotplt
) * 4);
666 else if (__builtin_expect (r_type
== R_386_TLS_DESC
, 1))
668 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
669 (struct tlsdesc
volatile *)reloc_addr
;
671 /* Handle relocations that reference the local *ABS* in a simple
672 way, so as to preserve a potential addend. */
673 if (ELF32_R_SYM (reloc
->r_info
) == 0)
674 td
->entry
= _dl_tlsdesc_resolve_abs_plus_addend
;
675 /* Given a known-zero addend, we can store a pointer to the
676 reloc in the arg position. */
677 else if (td
->arg
== 0)
679 td
->arg
= (void*)reloc
;
680 td
->entry
= _dl_tlsdesc_resolve_rel
;
684 /* We could handle non-*ABS* relocations with non-zero addends
685 by allocating dynamically an arg to hold a pointer to the
686 reloc, but that sounds pointless. */
687 const Elf32_Rel
*const r
= reloc
;
688 /* The code below was borrowed from elf_dynamic_do_rel(). */
689 const ElfW(Sym
) *const symtab
=
690 (const void *) D_PTR (map
, l_info
[DT_SYMTAB
]);
692 # ifdef RTLD_BOOTSTRAP
693 /* The dynamic linker always uses versioning. */
694 assert (map
->l_info
[VERSYMIDX (DT_VERSYM
)] != NULL
);
696 if (map
->l_info
[VERSYMIDX (DT_VERSYM
)])
699 const ElfW(Half
) *const version
=
700 (const void *) D_PTR (map
, l_info
[VERSYMIDX (DT_VERSYM
)]);
701 ElfW(Half
) ndx
= version
[ELFW(R_SYM
) (r
->r_info
)] & 0x7fff;
702 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)],
703 &map
->l_versions
[ndx
],
704 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
706 # ifndef RTLD_BOOTSTRAP
708 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)], NULL
,
709 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
713 else if (__builtin_expect (r_type
== R_386_IRELATIVE
, 0))
715 Elf32_Addr value
= map
->l_addr
+ *reloc_addr
;
716 if (__builtin_expect (!skip_ifunc
, 1))
717 value
= ((Elf32_Addr (*) (void)) value
) ();
721 _dl_reloc_bad_type (map
, r_type
, 1);
724 # ifndef RTLD_BOOTSTRAP
727 __attribute__ ((always_inline
))
728 elf_machine_lazy_rela (struct link_map
*map
,
729 Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
732 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
733 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
734 if (__builtin_expect (r_type
== R_386_JMP_SLOT
, 1))
736 else if (__builtin_expect (r_type
== R_386_TLS_DESC
, 1))
738 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
739 (struct tlsdesc
volatile *)reloc_addr
;
741 td
->arg
= (void*)reloc
;
742 td
->entry
= _dl_tlsdesc_resolve_rela
;
744 else if (__builtin_expect (r_type
== R_386_IRELATIVE
, 0))
746 Elf32_Addr value
= map
->l_addr
+ reloc
->r_addend
;
747 if (__builtin_expect (!skip_ifunc
, 1))
748 value
= ((Elf32_Addr (*) (void)) value
) ();
752 _dl_reloc_bad_type (map
, r_type
, 1);
755 # endif /* !RTLD_BOOTSTRAP */
757 #endif /* RESOLVE_MAP */