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04637865 | 1 | /* Machine-dependent ELF dynamic relocation inline functions. ARM version. |
6d7e8eda | 2 | Copyright (C) 1995-2023 Free Software Foundation, Inc. |
04637865 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
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. | |
04637865 UD |
9 | |
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 | |
3214b89b | 13 | Lesser General Public License for more details. |
04637865 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
04637865 UD |
18 | |
19 | #ifndef dl_machine_h | |
20 | #define dl_machine_h | |
21 | ||
22 | #define ELF_MACHINE_NAME "ARM" | |
23 | ||
4af6982e | 24 | #include <assert.h> |
04637865 | 25 | #include <sys/param.h> |
485a9bb9 | 26 | #include <tls.h> |
3447f0d7 | 27 | #include <dl-tlsdesc.h> |
73da6bac | 28 | #include <dl-irel.h> |
d6d89608 AZ |
29 | #include <dl-static-tls.h> |
30 | #include <dl-machine-rel.h> | |
04637865 | 31 | |
5d9eaeec RM |
32 | #ifndef CLEAR_CACHE |
33 | # error CLEAR_CACHE definition required to handle TEXTREL | |
34 | #endif | |
9d1306dd | 35 | |
f1dba308 | 36 | /* Return nonzero iff ELF header is compatible with the running host. */ |
04637865 | 37 | static inline int __attribute__ ((unused)) |
f1dba308 | 38 | elf_machine_matches_host (const Elf32_Ehdr *ehdr) |
04637865 | 39 | { |
f1dba308 | 40 | return ehdr->e_machine == EM_ARM; |
04637865 UD |
41 | } |
42 | ||
04637865 | 43 | /* Return the run-time load address of the shared object. */ |
bca0f5cb | 44 | static inline ElfW(Addr) __attribute__ ((unused)) |
04637865 UD |
45 | elf_machine_load_address (void) |
46 | { | |
bca0f5cb FS |
47 | extern const ElfW(Ehdr) __ehdr_start attribute_hidden; |
48 | return (ElfW(Addr)) &__ehdr_start; | |
04637865 UD |
49 | } |
50 | ||
bca0f5cb FS |
51 | /* Return the link-time address of _DYNAMIC. */ |
52 | static inline ElfW(Addr) __attribute__ ((unused)) | |
53 | elf_machine_dynamic (void) | |
54 | { | |
55 | extern ElfW(Dyn) _DYNAMIC[] attribute_hidden; | |
56 | return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address (); | |
57 | } | |
04637865 UD |
58 | |
59 | /* Set up the loaded object described by L so its unrelocated PLT | |
60 | entries will jump to the on-demand fixup code in dl-runtime.c. */ | |
61 | ||
62 | static inline int __attribute__ ((unused)) | |
490e6c62 FS |
63 | elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], |
64 | int lazy, int profile) | |
04637865 UD |
65 | { |
66 | Elf32_Addr *got; | |
67 | extern void _dl_runtime_resolve (Elf32_Word); | |
68 | extern void _dl_runtime_profile (Elf32_Word); | |
69 | ||
70 | if (l->l_info[DT_JMPREL] && lazy) | |
71 | { | |
72 | /* patb: this is different than i386 */ | |
73 | /* The GOT entries for functions in the PLT have not yet been filled | |
74 | in. Their initial contents will arrange when called to push an | |
75 | index into the .got section, load ip with &_GLOBAL_OFFSET_TABLE_[3], | |
76 | and then jump to _GLOBAL_OFFSET_TABLE[2]. */ | |
7189e3b8 | 77 | got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]); |
bcb5a520 UD |
78 | /* If a library is prelinked but we have to relocate anyway, |
79 | we have to be able to undo the prelinking of .got.plt. | |
80 | The prelinker saved us here address of .plt. */ | |
81 | if (got[1]) | |
82 | l->l_mach.plt = got[1] + l->l_addr; | |
04637865 UD |
83 | got[1] = (Elf32_Addr) l; /* Identify this shared object. */ |
84 | ||
85 | /* The got[2] entry contains the address of a function which gets | |
86 | called to get the address of a so far unresolved function and | |
87 | jump to it. The profiling extension of the dynamic linker allows | |
88 | to intercept the calls to collect information. In this case we | |
89 | don't store the address in the GOT so that all future calls also | |
90 | end in this function. */ | |
91 | if (profile) | |
92 | { | |
344b4b4e | 93 | got[2] = (Elf32_Addr) &_dl_runtime_profile; |
17f56d2f | 94 | |
849e84dd PB |
95 | if (GLRO(dl_profile) != NULL |
96 | && _dl_name_match_p (GLRO(dl_profile), l)) | |
17f56d2f UD |
97 | /* Say that we really want profiling and the timers are |
98 | started. */ | |
f71d7f57 | 99 | GL(dl_profile_map) = l; |
04637865 UD |
100 | } |
101 | else | |
102 | /* This function will get called to fix up the GOT entry indicated by | |
103 | the offset on the stack, and then jump to the resolved address. */ | |
104 | got[2] = (Elf32_Addr) &_dl_runtime_resolve; | |
105 | } | |
3447f0d7 | 106 | |
04637865 UD |
107 | return lazy; |
108 | } | |
109 | ||
3377126b | 110 | #if defined(ARCH_HAS_BX) |
12a15026 | 111 | #define BX(x) "bx\t" #x |
04637865 | 112 | #else |
12a15026 | 113 | #define BX(x) "mov\tpc, " #x |
04637865 UD |
114 | #endif |
115 | ||
04637865 UD |
116 | /* Mask identifying addresses reserved for the user program, |
117 | where the dynamic linker should not map anything. */ | |
118 | #define ELF_MACHINE_USER_ADDRESS_MASK 0xf8000000UL | |
119 | ||
120 | /* Initial entry point code for the dynamic linker. | |
121 | The C function `_dl_start' is the real entry point; | |
122 | its return value is the user program's entry point. */ | |
123 | ||
124 | #define RTLD_START asm ("\ | |
bbb3856d UD |
125 | .text\n\ |
126 | .globl _start\n\ | |
5631abde | 127 | .type _start, %function\n\ |
bbb3856d | 128 | .globl _dl_start_user\n\ |
5631abde | 129 | .type _dl_start_user, %function\n\ |
bbb3856d | 130 | _start:\n\ |
08b55be5 RM |
131 | @ we are PIC code, so get global offset table\n\ |
132 | ldr sl, .L_GET_GOT\n\ | |
bbb3856d UD |
133 | @ at start time, all the args are on the stack\n\ |
134 | mov r0, sp\n\ | |
135 | bl _dl_start\n\ | |
136 | @ returns user entry point in r0\n\ | |
137 | _dl_start_user:\n\ | |
5631abde JM |
138 | adr r6, .L_GET_GOT\n\ |
139 | add sl, sl, r6\n\ | |
bbb3856d | 140 | ldr r4, [sl, r4]\n\ |
08b55be5 RM |
141 | @ save the entry point in another register\n\ |
142 | mov r6, r0\n\ | |
f10eff58 DJ |
143 | @ get the original arg count\n\ |
144 | ldr r1, [sp]\n\ | |
bbb3856d UD |
145 | @ get the argv address\n\ |
146 | add r2, sp, #4\n\ | |
bbb3856d UD |
147 | @ compute envp\n\ |
148 | add r3, r2, r1, lsl #2\n\ | |
149 | add r3, r3, #4\n\ | |
bbb3856d UD |
150 | @ now we call _dl_init\n\ |
151 | ldr r0, .L_LOADED\n\ | |
152 | ldr r0, [sl, r0]\n\ | |
bbb3856d | 153 | @ call _dl_init\n\ |
c5684fdb | 154 | bl _dl_init(PLT)\n\ |
bbb3856d UD |
155 | @ load the finalizer function\n\ |
156 | ldr r0, .L_FINI_PROC\n\ | |
08b55be5 | 157 | add r0, sl, r0\n\ |
bbb3856d | 158 | @ jump to the user_s entry point\n\ |
47f0752a | 159 | " BX(r6) "\n\ |
f10eff58 | 160 | \n\ |
bbb3856d | 161 | .L_GET_GOT:\n\ |
5631abde | 162 | .word _GLOBAL_OFFSET_TABLE_ - .L_GET_GOT\n\ |
bbb3856d | 163 | .L_FINI_PROC:\n\ |
08b55be5 | 164 | .word _dl_fini(GOTOFF)\n\ |
f10eff58 | 165 | .L_ARGV:\n\ |
d6dea8c8 | 166 | .word __GI__dl_argv(GOTOFF)\n\ |
bbb3856d | 167 | .L_LOADED:\n\ |
08b55be5 | 168 | .word _rtld_local(GOTOFF)\n\ |
04637865 UD |
169 | .previous\n\ |
170 | "); | |
171 | ||
485a9bb9 DJ |
172 | /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or |
173 | TLS variable, so undefined references should not be allowed to | |
174 | define the value. | |
209826bc | 175 | ELF_RTYPE_CLASS_COPY iff TYPE should not be allowed to resolve to one |
a7629b1c | 176 | of the main executable's symbols, as for a COPY reloc. */ |
6dcecc64 JM |
177 | #ifndef RTLD_BOOTSTRAP |
178 | # define elf_machine_type_class(type) \ | |
485a9bb9 | 179 | ((((type) == R_ARM_JUMP_SLOT || (type) == R_ARM_TLS_DTPMOD32 \ |
3447f0d7 NS |
180 | || (type) == R_ARM_TLS_DTPOFF32 || (type) == R_ARM_TLS_TPOFF32 \ |
181 | || (type) == R_ARM_TLS_DESC) \ | |
485a9bb9 | 182 | * ELF_RTYPE_CLASS_PLT) \ |
a7629b1c | 183 | | (((type) == R_ARM_COPY) * ELF_RTYPE_CLASS_COPY)) |
6dcecc64 JM |
184 | #else |
185 | #define elf_machine_type_class(type) \ | |
186 | ((((type) == R_ARM_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ | |
a7629b1c | 187 | | (((type) == R_ARM_COPY) * ELF_RTYPE_CLASS_COPY)) |
6dcecc64 | 188 | #endif |
04637865 UD |
189 | |
190 | /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ | |
70217455 | 191 | #define ELF_MACHINE_JMP_SLOT R_ARM_JUMP_SLOT |
04637865 | 192 | |
04637865 UD |
193 | /* We define an initialization functions. This is called very early in |
194 | _dl_sysdep_start. */ | |
195 | #define DL_PLATFORM_INIT dl_platform_init () | |
196 | ||
04637865 UD |
197 | static inline void __attribute__ ((unused)) |
198 | dl_platform_init (void) | |
199 | { | |
cebbd6e7 | 200 | if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0') |
9b1eef96 | 201 | /* Avoid an empty string which would disturb us. */ |
cebbd6e7 | 202 | GLRO(dl_platform) = NULL; |
04637865 UD |
203 | } |
204 | ||
408c9db5 UD |
205 | static inline Elf32_Addr |
206 | elf_machine_fixup_plt (struct link_map *map, lookup_t t, | |
0572433b | 207 | const ElfW(Sym) *refsym, const ElfW(Sym) *sym, |
408c9db5 | 208 | const Elf32_Rel *reloc, |
04637865 UD |
209 | Elf32_Addr *reloc_addr, Elf32_Addr value) |
210 | { | |
408c9db5 | 211 | return *reloc_addr = value; |
04637865 UD |
212 | } |
213 | ||
214 | /* Return the final value of a plt relocation. */ | |
215 | static inline Elf32_Addr | |
216 | elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc, | |
217 | Elf32_Addr value) | |
218 | { | |
219 | return value; | |
220 | } | |
221 | ||
222 | #endif /* !dl_machine_h */ | |
223 | ||
04637865 | 224 | |
867700cb DJ |
225 | /* Names of the architecture-specific auditing callback functions. */ |
226 | #define ARCH_LA_PLTENTER arm_gnu_pltenter | |
227 | #define ARCH_LA_PLTEXIT arm_gnu_pltexit | |
228 | ||
849e84dd | 229 | #ifdef RESOLVE_MAP |
453b88ef AZ |
230 | /* Set NEW_VALUE based on V, and return true iff it overflows 24 bits. */ |
231 | static inline bool set_new_value (Elf32_Addr *new_value, Elf32_Addr v, | |
232 | Elf32_Addr *const reloc_addr, | |
233 | Elf32_Sword addend) | |
234 | { | |
235 | *new_value = v + addend - (Elf32_Addr) reloc_addr; | |
236 | Elf32_Addr topbits = *new_value & 0xfe000000; | |
237 | return topbits != 0xfe000000 && topbits != 0x00000000; | |
238 | } | |
239 | ||
fb228a2d | 240 | /* Handle a PC24 reloc, including the out-of-range case. */ |
490e6c62 | 241 | static void |
fb228a2d RM |
242 | relocate_pc24 (struct link_map *map, Elf32_Addr value, |
243 | Elf32_Addr *const reloc_addr, Elf32_Sword addend) | |
a27fd430 | 244 | { |
fb228a2d RM |
245 | Elf32_Addr new_value; |
246 | ||
453b88ef | 247 | if (set_new_value (&new_value, value, reloc_addr, addend)) |
a27fd430 | 248 | { |
fb228a2d RM |
249 | /* The PC-relative address doesn't fit in 24 bits! */ |
250 | ||
251 | static void *fix_page; | |
252 | static size_t fix_offset; | |
253 | if (fix_page == NULL) | |
254 | { | |
255 | void *new_page = __mmap (NULL, GLRO(dl_pagesize), | |
256 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
257 | MAP_PRIVATE | MAP_ANON, -1, 0); | |
258 | if (new_page == MAP_FAILED) | |
259 | _dl_signal_error (0, map->l_name, NULL, | |
260 | "could not map page for fixup"); | |
261 | fix_page = new_page; | |
262 | assert (fix_offset == 0); | |
263 | } | |
264 | ||
265 | Elf32_Word *fix_address = fix_page + fix_offset; | |
266 | fix_address[0] = 0xe51ff004; /* ldr pc, [pc, #-4] */ | |
267 | fix_address[1] = value; | |
268 | ||
269 | fix_offset += sizeof fix_address[0] * 2; | |
270 | if (fix_offset >= GLRO(dl_pagesize)) | |
271 | { | |
272 | fix_page = NULL; | |
273 | fix_offset = 0; | |
274 | } | |
275 | ||
453b88ef AZ |
276 | if (set_new_value (&new_value, (Elf32_Addr) fix_address, reloc_addr, |
277 | addend)) | |
fb228a2d RM |
278 | _dl_signal_error (0, map->l_name, NULL, |
279 | "R_ARM_PC24 relocation out of range"); | |
a27fd430 UD |
280 | } |
281 | ||
fb228a2d | 282 | *reloc_addr = (*reloc_addr & 0xff000000) | ((new_value >> 2) & 0x00ffffff); |
a27fd430 UD |
283 | } |
284 | ||
04637865 UD |
285 | /* Perform the relocation specified by RELOC and SYM (which is fully resolved). |
286 | MAP is the object containing the reloc. */ | |
287 | ||
490e6c62 | 288 | static inline void |
dda081dd | 289 | __attribute__ ((always_inline)) |
490e6c62 FS |
290 | elf_machine_rel (struct link_map *map, struct r_scope_elem *scope[], |
291 | const Elf32_Rel *reloc, const Elf32_Sym *sym, | |
292 | const struct r_found_version *version, | |
0507f293 | 293 | void *const reloc_addr_arg, int skip_ifunc) |
04637865 | 294 | { |
5027ae10 | 295 | Elf32_Addr *const reloc_addr = reloc_addr_arg; |
85bdccdb UD |
296 | const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); |
297 | ||
3ee318c9 | 298 | #if !defined RTLD_BOOTSTRAP |
85bdccdb | 299 | if (__builtin_expect (r_type == R_ARM_RELATIVE, 0)) |
3ee318c9 | 300 | *reloc_addr += map->l_addr; |
ceb7d0bb | 301 | # ifndef RTLD_BOOTSTRAP |
85bdccdb UD |
302 | else if (__builtin_expect (r_type == R_ARM_NONE, 0)) |
303 | return; | |
ceb7d0bb | 304 | # endif |
85bdccdb | 305 | else |
2aac58fc | 306 | #endif |
04637865 UD |
307 | { |
308 | const Elf32_Sym *const refsym = sym; | |
490e6c62 FS |
309 | struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, |
310 | r_type); | |
10a446dd | 311 | Elf32_Addr value = SYMBOL_ADDRESS (sym_map, sym, true); |
04637865 | 312 | |
70063199 | 313 | if (sym != NULL |
0507f293 AS |
314 | && __builtin_expect (ELFW(ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0) |
315 | && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1) | |
316 | && __builtin_expect (!skip_ifunc, 1)) | |
73da6bac | 317 | value = elf_ifunc_invoke (value); |
70063199 | 318 | |
85bdccdb | 319 | switch (r_type) |
04637865 UD |
320 | { |
321 | case R_ARM_COPY: | |
322 | if (sym == NULL) | |
323 | /* This can happen in trace mode if an object could not be | |
324 | found. */ | |
325 | break; | |
326 | if (sym->st_size > refsym->st_size | |
cebbd6e7 | 327 | || (GLRO(dl_verbose) && sym->st_size < refsym->st_size)) |
04637865 UD |
328 | { |
329 | const char *strtab; | |
330 | ||
7189e3b8 | 331 | strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
773b6400 UD |
332 | _dl_error_printf ("\ |
333 | %s: Symbol `%s' has different size in shared object, consider re-linking\n", | |
b9375348 | 334 | RTLD_PROGNAME, strtab + refsym->st_name); |
04637865 | 335 | } |
5027ae10 AO |
336 | memcpy (reloc_addr_arg, (void *) value, |
337 | MIN (sym->st_size, refsym->st_size)); | |
04637865 UD |
338 | break; |
339 | case R_ARM_GLOB_DAT: | |
70217455 | 340 | case R_ARM_JUMP_SLOT: |
ceb7d0bb | 341 | # ifdef RTLD_BOOTSTRAP |
e7782e5e | 342 | /* Fix weak undefined references. */ |
44bff568 | 343 | if (sym != NULL && sym->st_value == 0) |
e7782e5e UD |
344 | *reloc_addr = 0; |
345 | else | |
ceb7d0bb | 346 | # endif |
e7782e5e | 347 | *reloc_addr = value; |
04637865 | 348 | break; |
70217455 | 349 | case R_ARM_ABS32: |
04637865 | 350 | { |
3447612d MF |
351 | struct unaligned |
352 | { | |
353 | Elf32_Addr x; | |
9770df4f | 354 | } __attribute__ ((packed, may_alias)); |
ceb7d0bb | 355 | # ifndef RTLD_BOOTSTRAP |
04637865 UD |
356 | /* This is defined in rtld.c, but nowhere in the static |
357 | libc.a; make the reference weak so static programs can | |
358 | still link. This declaration cannot be done when | |
359 | compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP) because | |
360 | rtld.c contains the common defn for _dl_rtld_map, which | |
361 | is incompatible with a weak decl in the same file. */ | |
ceb7d0bb | 362 | # ifndef SHARED |
04637865 | 363 | weak_extern (_dl_rtld_map); |
ceb7d0bb | 364 | # endif |
2aac58fc | 365 | if (map == &GL(dl_rtld_map)) |
04637865 UD |
366 | /* Undo the relocation done here during bootstrapping. |
367 | Now we will relocate it anew, possibly using a | |
368 | binding found in the user program or a loaded library | |
369 | rather than the dynamic linker's built-in definitions | |
370 | used while loading those libraries. */ | |
10a446dd | 371 | value -= SYMBOL_ADDRESS (map, refsym, true); |
ceb7d0bb | 372 | # endif |
3447612d MF |
373 | /* Support relocations on mis-aligned offsets. */ |
374 | ((struct unaligned *) reloc_addr)->x += value; | |
04637865 UD |
375 | break; |
376 | } | |
3447f0d7 NS |
377 | case R_ARM_TLS_DESC: |
378 | { | |
28e1ddf3 | 379 | struct tlsdesc *td = (struct tlsdesc *)reloc_addr; |
3447f0d7 NS |
380 | |
381 | # ifndef RTLD_BOOTSTRAP | |
382 | if (! sym) | |
383 | td->entry = _dl_tlsdesc_undefweak; | |
384 | else | |
385 | # endif | |
386 | { | |
90e5dd48 MR |
387 | if (ELF32_R_SYM (reloc->r_info) == STN_UNDEF) |
388 | value = td->argument.value; | |
389 | else | |
390 | value = sym->st_value; | |
3447f0d7 NS |
391 | |
392 | # ifndef RTLD_BOOTSTRAP | |
393 | # ifndef SHARED | |
394 | CHECK_STATIC_TLS (map, sym_map); | |
395 | # else | |
396 | if (!TRY_STATIC_TLS (map, sym_map)) | |
397 | { | |
398 | td->argument.pointer | |
399 | = _dl_make_tlsdesc_dynamic (sym_map, value); | |
400 | td->entry = _dl_tlsdesc_dynamic; | |
401 | } | |
402 | else | |
403 | # endif | |
404 | # endif | |
0507f293 | 405 | { |
3447f0d7 NS |
406 | td->argument.value = value + sym_map->l_tls_offset; |
407 | td->entry = _dl_tlsdesc_return; | |
0507f293 | 408 | } |
3447f0d7 NS |
409 | } |
410 | } | |
411 | break; | |
d1af493c | 412 | case R_ARM_PC24: |
fb228a2d RM |
413 | relocate_pc24 (map, value, reloc_addr, |
414 | /* Sign-extend the 24-bit addend in the | |
415 | instruction (which counts instructions), and | |
416 | then shift it up two so as to count bytes. */ | |
417 | (((Elf32_Sword) *reloc_addr << 8) >> 8) << 2); | |
485a9bb9 | 418 | break; |
70063199 | 419 | #if !defined RTLD_BOOTSTRAP |
485a9bb9 DJ |
420 | case R_ARM_TLS_DTPMOD32: |
421 | /* Get the information from the link map returned by the | |
422 | resolv function. */ | |
423 | if (sym_map != NULL) | |
424 | *reloc_addr = sym_map->l_tls_modid; | |
425 | break; | |
426 | ||
427 | case R_ARM_TLS_DTPOFF32: | |
56865130 DJ |
428 | if (sym != NULL) |
429 | *reloc_addr += sym->st_value; | |
485a9bb9 DJ |
430 | break; |
431 | ||
432 | case R_ARM_TLS_TPOFF32: | |
56865130 DJ |
433 | if (sym != NULL) |
434 | { | |
435 | CHECK_STATIC_TLS (map, sym_map); | |
436 | *reloc_addr += sym->st_value + sym_map->l_tls_offset; | |
437 | } | |
485a9bb9 | 438 | break; |
70063199 RS |
439 | case R_ARM_IRELATIVE: |
440 | value = map->l_addr + *reloc_addr; | |
4db71d2f FW |
441 | if (__glibc_likely (!skip_ifunc)) |
442 | value = ((Elf32_Addr (*) (int)) value) (GLRO(dl_hwcap)); | |
70063199 RS |
443 | *reloc_addr = value; |
444 | break; | |
485a9bb9 | 445 | #endif |
04637865 | 446 | default: |
85bdccdb | 447 | _dl_reloc_bad_type (map, r_type, 0); |
04637865 UD |
448 | break; |
449 | } | |
450 | } | |
451 | } | |
452 | ||
bcb5a520 | 453 | |
490e6c62 | 454 | static inline void |
dda081dd | 455 | __attribute__ ((always_inline)) |
85bdccdb | 456 | elf_machine_rel_relative (Elf32_Addr l_addr, const Elf32_Rel *reloc, |
5027ae10 | 457 | void *const reloc_addr_arg) |
85bdccdb | 458 | { |
5027ae10 | 459 | Elf32_Addr *const reloc_addr = reloc_addr_arg; |
85bdccdb UD |
460 | *reloc_addr += l_addr; |
461 | } | |
462 | ||
bcb5a520 | 463 | |
490e6c62 | 464 | static inline void |
dda081dd | 465 | __attribute__ ((always_inline)) |
490e6c62 | 466 | elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], |
0507f293 AS |
467 | Elf32_Addr l_addr, const Elf32_Rel *reloc, |
468 | int skip_ifunc) | |
04637865 | 469 | { |
68d11b26 | 470 | Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); |
85bdccdb | 471 | const unsigned int r_type = ELF32_R_TYPE (reloc->r_info); |
344b4b4e | 472 | /* Check for unexpected PLT reloc type. */ |
85bdccdb | 473 | if (__builtin_expect (r_type == R_ARM_JUMP_SLOT, 1)) |
bcb5a520 UD |
474 | { |
475 | if (__builtin_expect (map->l_mach.plt, 0) == 0) | |
476 | *reloc_addr += l_addr; | |
477 | else | |
478 | *reloc_addr = map->l_mach.plt; | |
479 | } | |
3447f0d7 NS |
480 | else if (__builtin_expect (r_type == R_ARM_TLS_DESC, 1)) |
481 | { | |
0ca3d1d6 SN |
482 | const Elf_Symndx symndx = ELFW (R_SYM) (reloc->r_info); |
483 | const ElfW (Sym) *symtab = (const void *)D_PTR (map, l_info[DT_SYMTAB]); | |
484 | const ElfW (Sym) *sym = &symtab[symndx]; | |
485 | const struct r_found_version *version = NULL; | |
486 | ||
487 | if (map->l_info[VERSYMIDX (DT_VERSYM)] != NULL) | |
488 | { | |
489 | const ElfW (Half) *vernum = | |
490 | (const void *)D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]); | |
491 | version = &map->l_versions[vernum[symndx] & 0x7fff]; | |
492 | } | |
493 | ||
494 | /* Always initialize TLS descriptors completely, because lazy | |
495 | initialization requires synchronization at every TLS access. */ | |
490e6c62 | 496 | elf_machine_rel (map, scope, reloc, sym, version, reloc_addr, skip_ifunc); |
3447f0d7 | 497 | } |
893f3d10 | 498 | else |
85bdccdb | 499 | _dl_reloc_bad_type (map, r_type, 1); |
04637865 UD |
500 | } |
501 | ||
849e84dd | 502 | #endif /* RESOLVE_MAP */ |