1 /* Machine-dependent ELF dynamic relocation inline functions. i386 version.
2 Copyright (C) 1995-2014 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 (__glibc_unlikely (profile
))
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
295 #define ELF_MACHINE_NO_REL 0
299 /* Perform the relocation specified by RELOC and SYM (which is fully resolved).
300 MAP is the object containing the reloc. */
303 __attribute ((always_inline
))
304 elf_machine_rel (struct link_map
*map
, const Elf32_Rel
*reloc
,
305 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
306 void *const reloc_addr_arg
, int skip_ifunc
)
308 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
309 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
311 # if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
312 if (__glibc_unlikely (r_type
== R_386_RELATIVE
))
314 # if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
315 /* This is defined in rtld.c, but nowhere in the static libc.a;
316 make the reference weak so static programs can still link.
317 This declaration cannot be done when compiling rtld.c
318 (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
319 common defn for _dl_rtld_map, which is incompatible with a
320 weak decl in the same file. */
322 weak_extern (_dl_rtld_map
);
324 if (map
!= &GL(dl_rtld_map
)) /* Already done in rtld itself. */
326 *reloc_addr
+= map
->l_addr
;
328 # ifndef RTLD_BOOTSTRAP
329 else if (__glibc_unlikely (r_type
== R_386_NONE
))
333 # endif /* !RTLD_BOOTSTRAP and have no -z combreloc */
335 # ifndef RTLD_BOOTSTRAP
336 const Elf32_Sym
*const refsym
= sym
;
338 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
339 Elf32_Addr value
= sym_map
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
342 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
,
344 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
345 && __builtin_expect (!skip_ifunc
, 1))
346 value
= ((Elf32_Addr (*) (void)) value
) ();
350 # ifndef RTLD_BOOTSTRAP
352 /* Set to symbol size plus addend. */
353 *reloc_addr
+= sym
->st_size
;
361 case R_386_TLS_DTPMOD32
:
362 # ifdef RTLD_BOOTSTRAP
363 /* During startup the dynamic linker is always the module
365 XXX If this relocation is necessary move before RESOLVE
369 /* Get the information from the link map returned by the
372 *reloc_addr
= sym_map
->l_tls_modid
;
375 case R_386_TLS_DTPOFF32
:
376 # ifndef RTLD_BOOTSTRAP
377 /* During relocation all TLS symbols are defined and used.
378 Therefore the offset is already correct. */
380 *reloc_addr
= sym
->st_value
;
385 struct tlsdesc
volatile *td
=
386 (struct tlsdesc
volatile *)reloc_addr
;
388 # ifndef RTLD_BOOTSTRAP
390 td
->entry
= _dl_tlsdesc_undefweak
;
394 # ifndef RTLD_BOOTSTRAP
396 CHECK_STATIC_TLS (map
, sym_map
);
398 if (!TRY_STATIC_TLS (map
, sym_map
))
400 td
->arg
= _dl_make_tlsdesc_dynamic
401 (sym_map
, sym
->st_value
+ (ElfW(Word
))td
->arg
);
402 td
->entry
= _dl_tlsdesc_dynamic
;
408 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
409 + (ElfW(Word
))td
->arg
);
410 td
->entry
= _dl_tlsdesc_return
;
415 case R_386_TLS_TPOFF32
:
416 /* The offset is positive, backward from the thread pointer. */
417 # ifdef RTLD_BOOTSTRAP
418 *reloc_addr
+= map
->l_tls_offset
- sym
->st_value
;
420 /* We know the offset of object the symbol is contained in.
421 It is a positive value which will be subtracted from the
422 thread pointer. To get the variable position in the TLS
423 block we subtract the offset from that of the TLS block. */
426 CHECK_STATIC_TLS (map
, sym_map
);
427 *reloc_addr
+= sym_map
->l_tls_offset
- sym
->st_value
;
431 case R_386_TLS_TPOFF
:
432 /* The offset is negative, forward from the thread pointer. */
433 # ifdef RTLD_BOOTSTRAP
434 *reloc_addr
+= sym
->st_value
- map
->l_tls_offset
;
436 /* We know the offset of object the symbol is contained in.
437 It is a negative value which will be added to the
441 CHECK_STATIC_TLS (map
, sym_map
);
442 *reloc_addr
+= sym
->st_value
- sym_map
->l_tls_offset
;
447 # ifndef RTLD_BOOTSTRAP
449 *reloc_addr
+= value
;
452 *reloc_addr
+= (value
- (Elf32_Addr
) reloc_addr
);
456 /* This can happen in trace mode if an object could not be
459 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
460 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
461 && GLRO(dl_verbose
)))
465 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
467 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
468 RTLD_PROGNAME
, strtab
+ refsym
->st_name
);
470 memcpy (reloc_addr_arg
, (void *) value
,
471 MIN (sym
->st_size
, refsym
->st_size
));
473 case R_386_IRELATIVE
:
474 value
= map
->l_addr
+ *reloc_addr
;
475 value
= ((Elf32_Addr (*) (void)) value
) ();
479 _dl_reloc_bad_type (map
, r_type
, 0);
481 # endif /* !RTLD_BOOTSTRAP */
486 # ifndef RTLD_BOOTSTRAP
488 __attribute__ ((always_inline
))
489 elf_machine_rela (struct link_map
*map
, const Elf32_Rela
*reloc
,
490 const Elf32_Sym
*sym
, const struct r_found_version
*version
,
491 void *const reloc_addr_arg
, int skip_ifunc
)
493 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
494 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
496 if (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
)
497 *reloc_addr
= map
->l_addr
+ reloc
->r_addend
;
498 else if (r_type
!= R_386_NONE
)
500 # ifndef RESOLVE_CONFLICT_FIND_MAP
501 const Elf32_Sym
*const refsym
= sym
;
503 struct link_map
*sym_map
= RESOLVE_MAP (&sym
, version
, r_type
);
504 Elf32_Addr value
= sym
== NULL
? 0 : sym_map
->l_addr
+ sym
->st_value
;
507 && __builtin_expect (sym
->st_shndx
!= SHN_UNDEF
, 1)
508 && __builtin_expect (ELFW(ST_TYPE
) (sym
->st_info
) == STT_GNU_IFUNC
, 0)
509 && __builtin_expect (!skip_ifunc
, 1))
510 value
= ((Elf32_Addr (*) (void)) value
) ();
512 switch (ELF32_R_TYPE (reloc
->r_info
))
515 /* Set to symbol size plus addend. */
516 value
= sym
->st_size
;
520 *reloc_addr
= value
+ reloc
->r_addend
;
522 # ifndef RESOLVE_CONFLICT_FIND_MAP
523 /* Not needed for dl-conflict.c. */
525 *reloc_addr
= (value
+ reloc
->r_addend
- (Elf32_Addr
) reloc_addr
);
528 case R_386_TLS_DTPMOD32
:
529 /* Get the information from the link map returned by the
532 *reloc_addr
= sym_map
->l_tls_modid
;
534 case R_386_TLS_DTPOFF32
:
535 /* During relocation all TLS symbols are defined and used.
536 Therefore the offset is already correct. */
537 *reloc_addr
= (sym
== NULL
? 0 : sym
->st_value
) + reloc
->r_addend
;
541 struct tlsdesc
volatile *td
=
542 (struct tlsdesc
volatile *)reloc_addr
;
544 # ifndef RTLD_BOOTSTRAP
547 td
->arg
= (void*)reloc
->r_addend
;
548 td
->entry
= _dl_tlsdesc_undefweak
;
553 # ifndef RTLD_BOOTSTRAP
555 CHECK_STATIC_TLS (map
, sym_map
);
557 if (!TRY_STATIC_TLS (map
, sym_map
))
559 td
->arg
= _dl_make_tlsdesc_dynamic
560 (sym_map
, sym
->st_value
+ reloc
->r_addend
);
561 td
->entry
= _dl_tlsdesc_dynamic
;
567 td
->arg
= (void*)(sym
->st_value
- sym_map
->l_tls_offset
569 td
->entry
= _dl_tlsdesc_return
;
574 case R_386_TLS_TPOFF32
:
575 /* The offset is positive, backward from the thread pointer. */
576 /* We know the offset of object the symbol is contained in.
577 It is a positive value which will be subtracted from the
578 thread pointer. To get the variable position in the TLS
579 block we subtract the offset from that of the TLS block. */
582 CHECK_STATIC_TLS (map
, sym_map
);
583 *reloc_addr
= sym_map
->l_tls_offset
- sym
->st_value
587 case R_386_TLS_TPOFF
:
588 /* The offset is negative, forward from the thread pointer. */
589 /* We know the offset of object the symbol is contained in.
590 It is a negative value which will be added to the
594 CHECK_STATIC_TLS (map
, sym_map
);
595 *reloc_addr
= sym
->st_value
- sym_map
->l_tls_offset
601 /* This can happen in trace mode if an object could not be
604 if (__builtin_expect (sym
->st_size
> refsym
->st_size
, 0)
605 || (__builtin_expect (sym
->st_size
< refsym
->st_size
, 0)
606 && GLRO(dl_verbose
)))
610 strtab
= (const char *) D_PTR (map
, l_info
[DT_STRTAB
]);
612 %s: Symbol `%s' has different size in shared object, consider re-linking\n",
613 RTLD_PROGNAME
, strtab
+ refsym
->st_name
);
615 memcpy (reloc_addr_arg
, (void *) value
,
616 MIN (sym
->st_size
, refsym
->st_size
));
618 # endif /* !RESOLVE_CONFLICT_FIND_MAP */
619 case R_386_IRELATIVE
:
620 value
= map
->l_addr
+ reloc
->r_addend
;
621 value
= ((Elf32_Addr (*) (void)) value
) ();
625 /* We add these checks in the version to relocate ld.so only
626 if we are still debugging. */
627 _dl_reloc_bad_type (map
, r_type
, 0);
632 # endif /* !RTLD_BOOTSTRAP */
635 __attribute ((always_inline
))
636 elf_machine_rel_relative (Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
637 void *const reloc_addr_arg
)
639 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
640 assert (ELF32_R_TYPE (reloc
->r_info
) == R_386_RELATIVE
);
641 *reloc_addr
+= l_addr
;
644 # ifndef RTLD_BOOTSTRAP
646 __attribute__ ((always_inline
))
647 elf_machine_rela_relative (Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
648 void *const reloc_addr_arg
)
650 Elf32_Addr
*const reloc_addr
= reloc_addr_arg
;
651 *reloc_addr
= l_addr
+ reloc
->r_addend
;
653 # endif /* !RTLD_BOOTSTRAP */
656 __attribute__ ((always_inline
))
657 elf_machine_lazy_rel (struct link_map
*map
,
658 Elf32_Addr l_addr
, const Elf32_Rel
*reloc
,
661 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
662 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
663 /* Check for unexpected PLT reloc type. */
664 if (__glibc_likely (r_type
== R_386_JMP_SLOT
))
666 if (__builtin_expect (map
->l_mach
.plt
, 0) == 0)
667 *reloc_addr
+= l_addr
;
669 *reloc_addr
= (map
->l_mach
.plt
670 + (((Elf32_Addr
) reloc_addr
) - map
->l_mach
.gotplt
) * 4);
672 else if (__glibc_likely (r_type
== R_386_TLS_DESC
))
674 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
675 (struct tlsdesc
volatile *)reloc_addr
;
677 /* Handle relocations that reference the local *ABS* in a simple
678 way, so as to preserve a potential addend. */
679 if (ELF32_R_SYM (reloc
->r_info
) == 0)
680 td
->entry
= _dl_tlsdesc_resolve_abs_plus_addend
;
681 /* Given a known-zero addend, we can store a pointer to the
682 reloc in the arg position. */
683 else if (td
->arg
== 0)
685 td
->arg
= (void*)reloc
;
686 td
->entry
= _dl_tlsdesc_resolve_rel
;
690 /* We could handle non-*ABS* relocations with non-zero addends
691 by allocating dynamically an arg to hold a pointer to the
692 reloc, but that sounds pointless. */
693 const Elf32_Rel
*const r
= reloc
;
694 /* The code below was borrowed from elf_dynamic_do_rel(). */
695 const ElfW(Sym
) *const symtab
=
696 (const void *) D_PTR (map
, l_info
[DT_SYMTAB
]);
698 # ifdef RTLD_BOOTSTRAP
699 /* The dynamic linker always uses versioning. */
700 assert (map
->l_info
[VERSYMIDX (DT_VERSYM
)] != NULL
);
702 if (map
->l_info
[VERSYMIDX (DT_VERSYM
)])
705 const ElfW(Half
) *const version
=
706 (const void *) D_PTR (map
, l_info
[VERSYMIDX (DT_VERSYM
)]);
707 ElfW(Half
) ndx
= version
[ELFW(R_SYM
) (r
->r_info
)] & 0x7fff;
708 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)],
709 &map
->l_versions
[ndx
],
710 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
712 # ifndef RTLD_BOOTSTRAP
714 elf_machine_rel (map
, r
, &symtab
[ELFW(R_SYM
) (r
->r_info
)], NULL
,
715 (void *) (l_addr
+ r
->r_offset
), skip_ifunc
);
719 else if (__glibc_unlikely (r_type
== R_386_IRELATIVE
))
721 Elf32_Addr value
= map
->l_addr
+ *reloc_addr
;
722 if (__glibc_likely (!skip_ifunc
))
723 value
= ((Elf32_Addr (*) (void)) value
) ();
727 _dl_reloc_bad_type (map
, r_type
, 1);
730 # ifndef RTLD_BOOTSTRAP
733 __attribute__ ((always_inline
))
734 elf_machine_lazy_rela (struct link_map
*map
,
735 Elf32_Addr l_addr
, const Elf32_Rela
*reloc
,
738 Elf32_Addr
*const reloc_addr
= (void *) (l_addr
+ reloc
->r_offset
);
739 const unsigned int r_type
= ELF32_R_TYPE (reloc
->r_info
);
740 if (__glibc_likely (r_type
== R_386_JMP_SLOT
))
742 else if (__glibc_likely (r_type
== R_386_TLS_DESC
))
744 struct tlsdesc
volatile * __attribute__((__unused__
)) td
=
745 (struct tlsdesc
volatile *)reloc_addr
;
747 td
->arg
= (void*)reloc
;
748 td
->entry
= _dl_tlsdesc_resolve_rela
;
750 else if (__glibc_unlikely (r_type
== R_386_IRELATIVE
))
752 Elf32_Addr value
= map
->l_addr
+ reloc
->r_addend
;
753 if (__glibc_likely (!skip_ifunc
))
754 value
= ((Elf32_Addr (*) (void)) value
) ();
758 _dl_reloc_bad_type (map
, r_type
, 1);
761 # endif /* !RTLD_BOOTSTRAP */
763 #endif /* RESOLVE_MAP */