1 /* Machine-dependent ELF dynamic relocation inline functions. i386 version.
2 Copyright (C) 1995-2013 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
;
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 #define ARCH_FIXUP_ATTRIBUTE __attribute__ ((regparm (3), stdcall, unused))
156 extern ElfW(Addr
) _dl_fixup (struct link_map
*l
,
157 ElfW(Word
) reloc_offset
)
158 ARCH_FIXUP_ATTRIBUTE
;
159 extern ElfW(Addr
) _dl_profile_fixup (struct link_map
*l
,
160 ElfW(Word
) reloc_offset
,
161 ElfW(Addr
) retaddr
, void *regs
,
162 long int *framesizep
)
163 ARCH_FIXUP_ATTRIBUTE
;
168 /* Mask identifying addresses reserved for the user program,
169 where the dynamic linker should not map anything. */
170 #define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL
172 /* Initial entry point code for the dynamic linker.
173 The C function `_dl_start' is the real entry point;
174 its return value is the user program's entry point. */
176 #define RTLD_START asm ("\n\
179 0: movl (%esp), %ebx\n\
183 .globl _dl_start_user\n\
185 # Note that _dl_start gets the parameter in %eax.\n\
189 # Save the user entry point address in %edi.\n\
191 # Point %ebx at the GOT.\n\
193 addl $_GLOBAL_OFFSET_TABLE_, %ebx\n\
194 # See if we were run as a command with the executable file\n\
195 # name as an extra leading argument.\n\
196 movl _dl_skip_args@GOTOFF(%ebx), %eax\n\
197 # Pop the original argument count.\n\
199 # Adjust the stack pointer to skip _dl_skip_args words.\n\
200 leal (%esp,%eax,4), %esp\n\
201 # Subtract _dl_skip_args from argc.\n\
203 # Push argc back on the stack.\n\
205 # The special initializer gets called with the stack just\n\
206 # as the application's entry point will see it; it can\n\
207 # switch stacks if it moves these contents over.\n\
208 " RTLD_START_SPECIAL_INIT "\n\
209 # Load the parameters again.\n\
210 # (eax, edx, ecx, *--esp) = (_dl_loaded, argc, argv, envp)\n\
211 movl _rtld_local@GOTOFF(%ebx), %eax\n\
212 leal 8(%esp,%edx,4), %esi\n\
213 leal 4(%esp), %ecx\n\
215 # Make sure _dl_init is run with 16 byte aligned stack.\n\
221 # Clear %ebp, so that even constructors have terminated backchain.\n\
223 # Call the function to run the initializers.\n\
224 call _dl_init_internal@PLT\n\
225 # Pass our finalizer function to the user in %edx, as per ELF ABI.\n\
226 leal _dl_fini@GOTOFF(%ebx), %edx\n\
227 # Restore %esp _start expects.\n\
229 # Jump to the user's entry point.\n\
234 #ifndef RTLD_START_SPECIAL_INIT
235 # define RTLD_START_SPECIAL_INIT /* nothing */
238 /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
239 TLS variable, so undefined references should not be allowed to
241 ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
242 of the main executable's symbols, as for a COPY reloc. */
243 # define elf_machine_type_class(type) \
244 ((((type) == R_386_JMP_SLOT || (type) == R_386_TLS_DTPMOD32 \
245 || (type) == R_386_TLS_DTPOFF32 || (type) == R_386_TLS_TPOFF32 \
246 || (type) == R_386_TLS_TPOFF || (type) == R_386_TLS_DESC) \
247 * ELF_RTYPE_CLASS_PLT) \
248 | (((type) == R_386_COPY) * ELF_RTYPE_CLASS_COPY))
250 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
251 #define ELF_MACHINE_JMP_SLOT R_386_JMP_SLOT
253 /* The i386 never uses Elf32_Rela relocations for the dynamic linker.
254 Prelinked libraries may use Elf32_Rela though. */
255 #define ELF_MACHINE_PLT_REL 1
257 /* We define an initialization functions. This is called very early in
259 #define DL_PLATFORM_INIT dl_platform_init ()
261 static inline void __attribute__ ((unused
))
262 dl_platform_init (void)
264 if (GLRO(dl_platform
) != NULL
&& *GLRO(dl_platform
) == '\0')
265 /* Avoid an empty string which would disturb us. */
266 GLRO(dl_platform
) = NULL
;
269 static inline Elf32_Addr
270 elf_machine_fixup_plt (struct link_map
*map
, lookup_t t
,
271 const Elf32_Rel
*reloc
,
272 Elf32_Addr
*reloc_addr
, Elf32_Addr value
)
274 return *reloc_addr
= value
;
277 /* Return the final value of a plt relocation. */
278 static inline Elf32_Addr
279 elf_machine_plt_value (struct link_map
*map
, const Elf32_Rel
*reloc
,
286 /* Names of the architecture-specific auditing callback functions. */
287 #define ARCH_LA_PLTENTER i86_gnu_pltenter
288 #define ARCH_LA_PLTEXIT i86_gnu_pltexit
290 #endif /* !dl_machine_h */
292 /* The i386 never uses Elf32_Rela relocations for the dynamic linker.
293 Prelinked libraries may use Elf32_Rela though. */
294 #define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP
298 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
299 MAP is the object containing the reloc. */
302 __attribute ((always_inline
))
303 elf_machine_rel (struct link_map
*map
, const Elf32_Rel
*reloc
,
304 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
305 void *const reloc_addr_arg
, int skip_ifunc
)
307 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
308 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
310 # if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
311 if (__builtin_expect (r_type
== R_386_RELATIVE
, 0))
313 # if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
314 /* This is defined in rtld.c, but nowhere in the static libc.a;
315 make the reference weak so static programs can still link.
316 This declaration cannot be done when compiling rtld.c
317 (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
318 common defn for _dl_rtld_map, which is incompatible with a
319 weak decl in the same file. */
321 weak_extern (_dl_rtld_map
);
323 if (map
!= &GL(dl_rtld_map
)) /* Already done in rtld itself. */
325 *reloc_addr
+= map
->l_addr
;
327 # ifndef RTLD_BOOTSTRAP
328 else if (__builtin_expect (r_type
== R_386_NONE
, 0))
332 # endif /* !RTLD_BOOTSTRAP and have no -z combreloc */
334 # ifndef RTLD_BOOTSTRAP
335 const Elf32_Sym
*const refsym
= sym
;
337 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
338 Elf32_Addr value
= sym_map
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
341 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
,
343 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
344 && __builtin_expect (!skip_ifunc
, 1))
345 value
= ((Elf32_Addr (*) (void)) value
) ();
349 # ifndef RTLD_BOOTSTRAP
351 /* Set to symbol size plus addend. */
352 *reloc_addr
+= sym
->st_size
;
360 case R_386_TLS_DTPMOD32
:
361 # ifdef RTLD_BOOTSTRAP
362 /* During startup the dynamic linker is always the module
364 XXX If this relocation is necessary move before RESOLVE
368 /* Get the information from the link map returned by the
371 *reloc_addr
= sym_map
->l_tls_modid
;
374 case R_386_TLS_DTPOFF32
:
375 # ifndef RTLD_BOOTSTRAP
376 /* During relocation all TLS symbols are defined and used.
377 Therefore the offset is already correct. */
379 *reloc_addr
= sym
->st_value
;
384 struct tlsdesc
volatile *td
=
385 (struct tlsdesc
volatile *)reloc_addr
;
387 # ifndef RTLD_BOOTSTRAP
389 td
->entry
= _dl_tlsdesc_undefweak
;
393 # ifndef RTLD_BOOTSTRAP
395 CHECK_STATIC_TLS (map
, sym_map
);
397 if (!TRY_STATIC_TLS (map
, sym_map
))
399 td
->arg
= _dl_make_tlsdesc_dynamic
400 (sym_map
, sym
->st_value
+ (ElfW(Word
))td
->arg
);
401 td
->entry
= _dl_tlsdesc_dynamic
;
407 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
408 + (ElfW(Word
))td
->arg
);
409 td
->entry
= _dl_tlsdesc_return
;
414 case R_386_TLS_TPOFF32
:
415 /* The offset is positive, backward from the thread pointer. */
416 # ifdef RTLD_BOOTSTRAP
417 *reloc_addr
+= map
->l_tls_offset
- sym
->st_value
;
419 /* We know the offset of object the symbol is contained in.
420 It is a positive value which will be subtracted from the
421 thread pointer. To get the variable position in the TLS
422 block we subtract the offset from that of the TLS block. */
425 CHECK_STATIC_TLS (map
, sym_map
);
426 *reloc_addr
+= sym_map
->l_tls_offset
- sym
->st_value
;
430 case R_386_TLS_TPOFF
:
431 /* The offset is negative, forward from the thread pointer. */
432 # ifdef RTLD_BOOTSTRAP
433 *reloc_addr
+= sym
->st_value
- map
->l_tls_offset
;
435 /* We know the offset of object the symbol is contained in.
436 It is a negative value which will be added to the
440 CHECK_STATIC_TLS (map
, sym_map
);
441 *reloc_addr
+= sym
->st_value
- sym_map
->l_tls_offset
;
446 # ifndef RTLD_BOOTSTRAP
448 *reloc_addr
+= value
;
451 *reloc_addr
+= (value
- (Elf32_Addr
) reloc_addr
);
455 /* This can happen in trace mode if an object could not be
458 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
459 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
460 && GLRO(dl_verbose
)))
464 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
466 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
467 RTLD_PROGNAME
, strtab
+ refsym
->st_name
);
469 memcpy (reloc_addr_arg
, (void *) value
,
470 MIN (sym
->st_size
, refsym
->st_size
));
472 case R_386_IRELATIVE
:
473 value
= map
->l_addr
+ *reloc_addr
;
474 value
= ((Elf32_Addr (*) (void)) value
) ();
478 _dl_reloc_bad_type (map
, r_type
, 0);
480 # endif /* !RTLD_BOOTSTRAP */
485 # ifndef RTLD_BOOTSTRAP
487 __attribute__ ((always_inline
))
488 elf_machine_rela (struct link_map
*map
, const Elf32_Rela
*reloc
,
489 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
490 void *const reloc_addr_arg
, int skip_ifunc
)
492 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
493 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
495 if (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
)
496 *reloc_addr
= map
->l_addr
+ reloc
->r_addend
;
497 else if (r_type
!= R_386_NONE
)
499 # ifndef RESOLVE_CONFLICT_FIND_MAP
500 const Elf32_Sym
*const refsym
= sym
;
502 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
503 Elf32_Addr value
= sym
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
506 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
507 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
, 0)
508 && __builtin_expect (!skip_ifunc
, 1))
509 value
= ((Elf32_Addr (*) (void)) value
) ();
511 switch (ELF32_R_TYPE (reloc
->r_info
))
514 /* Set to symbol size plus addend. */
515 value
= sym
->st_size
;
519 *reloc_addr
= value
+ reloc
->r_addend
;
521 # ifndef RESOLVE_CONFLICT_FIND_MAP
522 /* Not needed for dl-conflict.c. */
524 *reloc_addr
= (value
+ reloc
->r_addend
- (Elf32_Addr
) reloc_addr
);
527 case R_386_TLS_DTPMOD32
:
528 /* Get the information from the link map returned by the
531 *reloc_addr
= sym_map
->l_tls_modid
;
533 case R_386_TLS_DTPOFF32
:
534 /* During relocation all TLS symbols are defined and used.
535 Therefore the offset is already correct. */
536 *reloc_addr
= (sym
== NULL
? 0 : sym
->st_value
) + reloc
->r_addend
;
540 struct tlsdesc
volatile *td
=
541 (struct tlsdesc
volatile *)reloc_addr
;
543 # ifndef RTLD_BOOTSTRAP
546 td
->arg
= (void*)reloc
->r_addend
;
547 td
->entry
= _dl_tlsdesc_undefweak
;
552 # ifndef RTLD_BOOTSTRAP
554 CHECK_STATIC_TLS (map
, sym_map
);
556 if (!TRY_STATIC_TLS (map
, sym_map
))
558 td
->arg
= _dl_make_tlsdesc_dynamic
559 (sym_map
, sym
->st_value
+ reloc
->r_addend
);
560 td
->entry
= _dl_tlsdesc_dynamic
;
566 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
568 td
->entry
= _dl_tlsdesc_return
;
573 case R_386_TLS_TPOFF32
:
574 /* The offset is positive, backward from the thread pointer. */
575 /* We know the offset of object the symbol is contained in.
576 It is a positive value which will be subtracted from the
577 thread pointer. To get the variable position in the TLS
578 block we subtract the offset from that of the TLS block. */
581 CHECK_STATIC_TLS (map
, sym_map
);
582 *reloc_addr
= sym_map
->l_tls_offset
- sym
->st_value
586 case R_386_TLS_TPOFF
:
587 /* The offset is negative, forward from the thread pointer. */
588 /* We know the offset of object the symbol is contained in.
589 It is a negative value which will be added to the
593 CHECK_STATIC_TLS (map
, sym_map
);
594 *reloc_addr
= sym
->st_value
- sym_map
->l_tls_offset
600 /* This can happen in trace mode if an object could not be
603 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
604 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
605 && GLRO(dl_verbose
)))
609 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
611 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
612 RTLD_PROGNAME
, strtab
+ refsym
->st_name
);
614 memcpy (reloc_addr_arg
, (void *) value
,
615 MIN (sym
->st_size
, refsym
->st_size
));
617 # endif /* !RESOLVE_CONFLICT_FIND_MAP */
618 case R_386_IRELATIVE
:
619 value
= map
->l_addr
+ reloc
->r_addend
;
620 value
= ((Elf32_Addr (*) (void)) value
) ();
624 /* We add these checks in the version to relocate ld.so only
625 if we are still debugging. */
626 _dl_reloc_bad_type (map
, r_type
, 0);
631 # endif /* !RTLD_BOOTSTRAP */
634 __attribute ((always_inline
))
635 elf_machine_rel_relative (Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
636 void *const reloc_addr_arg
)
638 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
639 assert (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
);
640 *reloc_addr
+= l_addr
;
643 # ifndef RTLD_BOOTSTRAP
645 __attribute__ ((always_inline
))
646 elf_machine_rela_relative (Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
647 void *const reloc_addr_arg
)
649 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
650 *reloc_addr
= l_addr
+ reloc
->r_addend
;
652 # endif /* !RTLD_BOOTSTRAP */
655 __attribute__ ((always_inline
))
656 elf_machine_lazy_rel (struct link_map
*map
,
657 Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
660 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
661 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
662 /* Check for unexpected PLT reloc type. */
663 if (__builtin_expect (r_type
== R_386_JMP_SLOT
, 1))
665 if (__builtin_expect (map
->l_mach
.plt
, 0) == 0)
666 *reloc_addr
+= l_addr
;
668 *reloc_addr
= (map
->l_mach
.plt
669 + (((Elf32_Addr
) reloc_addr
) - map
->l_mach
.gotplt
) * 4);
671 else if (__builtin_expect (r_type
== R_386_TLS_DESC
, 1))
673 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
674 (struct tlsdesc
volatile *)reloc_addr
;
676 /* Handle relocations that reference the local *ABS* in a simple
677 way, so as to preserve a potential addend. */
678 if (ELF32_R_SYM (reloc
->r_info
) == 0)
679 td
->entry
= _dl_tlsdesc_resolve_abs_plus_addend
;
680 /* Given a known-zero addend, we can store a pointer to the
681 reloc in the arg position. */
682 else if (td
->arg
== 0)
684 td
->arg
= (void*)reloc
;
685 td
->entry
= _dl_tlsdesc_resolve_rel
;
689 /* We could handle non-*ABS* relocations with non-zero addends
690 by allocating dynamically an arg to hold a pointer to the
691 reloc, but that sounds pointless. */
692 const Elf32_Rel
*const r
= reloc
;
693 /* The code below was borrowed from elf_dynamic_do_rel(). */
694 const ElfW(Sym
) *const symtab
=
695 (const void *) D_PTR (map
, l_info
[DT_SYMTAB
]);
697 # ifdef RTLD_BOOTSTRAP
698 /* The dynamic linker always uses versioning. */
699 assert (map
->l_info
[VERSYMIDX (DT_VERSYM
)] != NULL
);
701 if (map
->l_info
[VERSYMIDX (DT_VERSYM
)])
704 const ElfW(Half
) *const version
=
705 (const void *) D_PTR (map
, l_info
[VERSYMIDX (DT_VERSYM
)]);
706 ElfW(Half
) ndx
= version
[ELFW(R_SYM
) (r
->r_info
)] & 0x7fff;
707 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)],
708 &map
->l_versions
[ndx
],
709 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
711 # ifndef RTLD_BOOTSTRAP
713 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)], NULL
,
714 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
718 else if (__builtin_expect (r_type
== R_386_IRELATIVE
, 0))
720 Elf32_Addr value
= map
->l_addr
+ *reloc_addr
;
721 if (__builtin_expect (!skip_ifunc
, 1))
722 value
= ((Elf32_Addr (*) (void)) value
) ();
726 _dl_reloc_bad_type (map
, r_type
, 1);
729 # ifndef RTLD_BOOTSTRAP
732 __attribute__ ((always_inline
))
733 elf_machine_lazy_rela (struct link_map
*map
,
734 Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
737 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
738 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
739 if (__builtin_expect (r_type
== R_386_JMP_SLOT
, 1))
741 else if (__builtin_expect (r_type
== R_386_TLS_DESC
, 1))
743 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
744 (struct tlsdesc
volatile *)reloc_addr
;
746 td
->arg
= (void*)reloc
;
747 td
->entry
= _dl_tlsdesc_resolve_rela
;
749 else if (__builtin_expect (r_type
== R_386_IRELATIVE
, 0))
751 Elf32_Addr value
= map
->l_addr
+ reloc
->r_addend
;
752 if (__builtin_expect (!skip_ifunc
, 1))
753 value
= ((Elf32_Addr (*) (void)) value
) ();
757 _dl_reloc_bad_type (map
, r_type
, 1);
760 # endif /* !RTLD_BOOTSTRAP */
762 #endif /* RESOLVE_MAP */