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Support cancellation in librt.
[glibc.git] / sysdeps / ia64 / dl-machine.h
blob7aaf0848e37f1d9689b261975e63a9d38312699e
1 /* Machine-dependent ELF dynamic relocation inline functions. IA-64 version.
2 Copyright (C) 1995-1997, 2000-2002, 2003 Free Software Foundation, Inc.
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
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.
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
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 #ifndef dl_machine_h
21 #define dl_machine_h 1
22
23 #define ELF_MACHINE_NAME "ia64"
24
25 #include <assert.h>
26 #include <string.h>
27 #include <link.h>
28 #include <errno.h>
29 #include <dl-fptr.h>
30 #include <tls.h>
31
32 /* Translate a processor specific dynamic tag to the index
33 in l_info array. */
34 #define DT_IA_64(x) (DT_IA_64_##x - DT_LOPROC + DT_NUM)
35
36 static inline void
37 __ia64_init_bootstrap_fdesc_table (struct link_map *map)
38 {
39 Elf64_Addr *boot_table;
40
41 /* careful: this will be called before got has been relocated... */
42 asm (";; addl %0 = @gprel (_dl_boot_fptr_table), gp" : "=r"(boot_table));
43
44 map->l_mach.fptr_table_len = ELF_MACHINE_BOOT_FPTR_TABLE_LEN;
45 map->l_mach.fptr_table = boot_table;
46 }
47
48 #define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info) \
49 __ia64_init_bootstrap_fdesc_table (&bootstrap_map);
50
51 /* Return nonzero iff ELF header is compatible with the running host. */
52 static inline int
53 elf_machine_matches_host (const Elf64_Ehdr *ehdr)
54 {
55 return ehdr->e_machine == EM_IA_64;
56 }
57
58
59 /* Return the link-time address of _DYNAMIC. */
60 static inline Elf64_Addr
61 elf_machine_dynamic (void)
62 {
63 Elf64_Addr *p;
64
65 __asm__ (
66 ".section .sdata\n"
67 " .type __dynamic_ltv#, @object\n"
68 " .size __dynamic_ltv#, 8\n"
69 "__dynamic_ltv:\n"
70 " data8 @ltv(_DYNAMIC#)\n"
71 ".previous\n"
72 " addl %0 = @gprel(__dynamic_ltv#), gp ;;"
73 : "=r" (p));
74
75 return *p;
76 }
77
78
79 /* Return the run-time load address of the shared object. */
80 static inline Elf64_Addr
81 elf_machine_load_address (void)
82 {
83 Elf64_Addr ip;
84 int *p;
85
86 __asm__ (
87 "1: mov %0 = ip\n"
88 ".section .sdata\n"
89 "2: data4 @ltv(1b)\n"
90 " .align 8\n"
91 ".previous\n"
92 " addl %1 = @gprel(2b), gp ;;"
93 : "=r" (ip), "=r" (p));
94
95 return ip - (Elf64_Addr) *p;
96 }
97
98 /* Set up the loaded object described by L so its unrelocated PLT
99 entries will jump to the on-demand fixup code in dl-runtime.c. */
100
101 static inline int
102 elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
103 {
104 extern void _dl_runtime_resolve (void);
105 extern void _dl_runtime_profile (void);
106
107 if (lazy)
108 {
109 register Elf64_Addr gp __asm__ ("gp");
110 Elf64_Addr *reserve, doit;
111
112 /*
113 * Careful with the typecast here or it will try to add l-l_addr
114 * pointer elements
115 */
116 reserve = ((Elf64_Addr *)
117 (l->l_info[DT_IA_64 (PLT_RESERVE)]->d_un.d_ptr + l->l_addr));
118 /* Identify this shared object. */
119 reserve[0] = (Elf64_Addr) l;
120
121 /* This function will be called to perform the relocation. */
122 if (!profile)
123 doit = (Elf64_Addr) ((struct fdesc *) &_dl_runtime_resolve)->ip;
124 else
125 {
126 if (_dl_name_match_p (GL(dl_profile), l))
127 {
128 /* This is the object we are looking for. Say that we really
129 want profiling and the timers are started. */
130 GL(dl_profile_map) = l;
131 }
132 doit = (Elf64_Addr) ((struct fdesc *) &_dl_runtime_profile)->ip;
133 }
134
135 reserve[1] = doit;
136 reserve[2] = gp;
137 }
138
139 return lazy;
140 }
141
142
143 /*
144 This code is used in dl-runtime.c to call the `fixup' function
145 and then redirect to the address it returns. `fixup()' takes two
146 arguments, however profile_fixup() takes three.
147
148 The ABI specifies that we will never see more than 8 input
149 registers to a function call, thus it is safe to simply allocate
150 those, and simpler than playing stack games.
151 - 12/09/99 Jes
152 */
153 #define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name) \
154 extern void tramp_name (void); \
155 asm ( \
156 " .global " #tramp_name "#\n" \
157 " .proc " #tramp_name "#\n" \
158 #tramp_name ":\n" \
159 " { .mmi\n" \
160 " .prologue\n" \
161 " .save ar.pfs, r40\n" \
162 " alloc loc0 = ar.pfs, 8, 6, 3, 0\n" \
163 " adds r2 = -144, r12\n" \
164 " adds r3 = -128, r12\n" \
165 " }\n" \
166 " { .mii\n" \
167 " .fframe 160\n" \
168 " adds r12 = -160, r12\n" \
169 " .save rp, r41\n" \
170 " mov loc1 = b0\n" \
171 " .body\n" \
172 " mov out2 = b0 /* needed by fixup_profile */\n" \
173 " ;;\n" \
174 " }\n" \
175 " { .mfb\n" \
176 " mov loc2 = r8 /* preserve struct value register */\n" \
177 " nop.f 0\n" \
178 " nop.b 0\n" \
179 " }\n" \
180 " { .mii\n" \
181 " mov loc3 = r9 /* preserve language specific register */\n" \
182 " mov loc4 = r10 /* preserve language specific register */\n" \
183 " mov loc5 = r11 /* preserve language specific register */\n" \
184 " }\n" \
185 " { .mmi\n" \
186 " stf.spill [r2] = f8, 32\n" \
187 " stf.spill [r3] = f9, 32\n" \
188 " mov out0 = r16\n" \
189 " ;;\n" \
190 " }\n" \
191 " { .mmi\n" \
192 " stf.spill [r2] = f10, 32\n" \
193 " stf.spill [r3] = f11, 32\n" \
194 " shl out1 = r15, 4\n" \
195 " ;;\n" \
196 " }\n" \
197 " { .mmi\n" \
198 " stf.spill [r2] = f12, 32\n" \
199 " stf.spill [r3] = f13, 32\n" \
200 " shladd out1 = r15, 3, out1\n" \
201 " ;;\n" \
202 " }\n" \
203 " { .mmb\n" \
204 " stf.spill [r2] = f14\n" \
205 " stf.spill [r3] = f15\n" \
206 " br.call.sptk.many b0 = " #fixup_name "#\n" \
207 " }\n" \
208 " { .mii\n" \
209 " ld8 r9 = [ret0], 8\n" \
210 " adds r2 = 16, r12\n" \
211 " adds r3 = 32, r12\n" \
212 " ;;\n" \
213 " }\n" \
214 " { .mmi\n" \
215 " ldf.fill f8 = [r2], 32\n" \
216 " ldf.fill f9 = [r3], 32\n" \
217 " mov b0 = loc1\n" \
218 " ;;\n" \
219 " }\n" \
220 " { .mmi\n" \
221 " ldf.fill f10 = [r2], 32\n" \
222 " ldf.fill f11 = [r3], 32\n" \
223 " mov b6 = r9\n" \
224 " ;;\n" \
225 " }\n" \
226 " { .mmi\n" \
227 " ldf.fill f12 = [r2], 32\n" \
228 " ldf.fill f13 = [r3], 32\n" \
229 " mov ar.pfs = loc0\n" \
230 " ;;\n" \
231 " }\n" \
232 " { .mmi\n" \
233 " ldf.fill f14 = [r2], 32\n" \
234 " ldf.fill f15 = [r3], 32\n" \
235 " .restore sp /* pop the unwind frame state */\n" \
236 " adds r12 = 160, r12\n" \
237 " ;;\n" \
238 " }\n" \
239 " { .mii\n" \
240 " mov r9 = loc3 /* restore language specific register */\n" \
241 " mov r10 = loc4 /* restore language specific register */\n" \
242 " mov r11 = loc5 /* restore language specific register */\n" \
243 " }\n" \
244 " { .mii\n" \
245 " ld8 gp = [ret0]\n" \
246 " mov r8 = loc2 /* restore struct value register */\n" \
247 " ;;\n" \
248 " }\n" \
249 " /* An alloc is needed for the break system call to work.\n" \
250 " We don't care about the old value of the pfs register. */\n" \
251 " { .mmb\n" \
252 " .prologue\n" \
253 " .body\n" \
254 " alloc r2 = ar.pfs, 0, 0, 8, 0\n" \
255 " br.sptk.many b6\n" \
256 " ;;\n" \
257 " }\n" \
258 " .endp " #tramp_name "#\n");
259
260 #ifndef PROF
261 #define ELF_MACHINE_RUNTIME_TRAMPOLINE \
262 TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
263 TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
264 #else
265 #define ELF_MACHINE_RUNTIME_TRAMPOLINE \
266 TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup); \
267 strong_alias (_dl_runtime_resolve, _dl_runtime_profile);
268 #endif
269
270
271 /* Initial entry point code for the dynamic linker.
272 The C function `_dl_start' is the real entry point;
273 its return value is the user program's entry point. */
274
275 #define RTLD_START asm ( \
276 ".text\n" \
277 " .global _start#\n" \
278 " .proc _start#\n" \
279 "_start:\n" \
280 "0: { .mii\n" \
281 " .prologue\n" \
282 " .save rp, r0\n" \
283 " .body\n" \
284 " .prologue\n" \
285 " .save ar.pfs, r32\n" \
286 " alloc loc0 = ar.pfs, 0, 3, 4, 0\n" \
287 " .body\n" \
288 " mov r2 = ip\n" \
289 " addl r3 = @gprel(0b), r0\n" \
290 " ;;\n" \
291 " }\n" \
292 " { .mlx\n" \
293 " /* Calculate the GP, and save a copy in loc1. */\n" \
294 " sub gp = r2, r3\n" \
295 " movl r8 = 0x9804c0270033f\n" \
296 " ;;\n" \
297 " }\n" \
298 " { .mii\n" \
299 " mov ar.fpsr = r8\n" \
300 " sub loc1 = r2, r3\n" \
301 " /* _dl_start wants a pointer to the pointer to the arg block and\n" \
302 " the arg block starts with an integer, thus the magic 16. */\n" \
303 " adds out0 = 16, sp\n" \
304 " }\n" \
305 " { .bbb\n" \
306 " br.call.sptk.many b0 = _dl_start#\n" \
307 " ;;\n" \
308 " }\n" \
309 " .endp _start#\n" \
310 " /* FALLTHRU */\n" \
311 " .global _dl_start_user#\n" \
312 " .proc _dl_start_user#\n" \
313 "_dl_start_user:\n" \
314 " .prologue\n" \
315 " .save rp, r0\n" \
316 " .body\n" \
317 " .prologue\n" \
318 " .save ar.pfs, r32\n" \
319 " .body\n" \
320 " { .mii\n" \
321 " /* Save the pointer to the user entry point fptr in loc2. */\n" \
322 " mov loc2 = ret0\n" \
323 " /* Store the highest stack address. */\n" \
324 " addl r2 = @ltoff(__libc_stack_end#), gp\n" \
325 " addl r3 = @gprel(_dl_skip_args), gp\n" \
326 " ;;\n" \
327 " }\n" \
328 " { .mmi\n" \
329 " ld8 r2 = [r2]\n" \
330 " ld4 r3 = [r3]\n" \
331 " adds r11 = 24, sp /* Load the address of argv. */\n" \
332 " ;;\n" \
333 " }\n" \
334 " { .mii\n" \
335 " st8 [r2] = sp\n" \
336 " adds r10 = 16, sp /* Load the address of argc. */\n" \
337 " mov out2 = r11\n" \
338 " ;;\n" \
339 " /* See if we were run as a command with the executable file\n" \
340 " name as an extra leading argument. If so, adjust the argv\n" \
341 " pointer to skip _dl_skip_args words.\n" \
342 " Note that _dl_skip_args is an integer, not a long - Jes\n" \
343 "\n" \
344 " The stack pointer has to be 16 byte aligned. We cannot simply\n" \
345 " addjust the stack pointer. We have to move the whole argv and\n" \
346 " envp and adjust _dl_argv by _dl_skip_args. H.J. */\n" \
347 " }\n" \
348 " { .mib\n" \
349 " ld8 out1 = [r10] /* is argc actually stored as a long\n" \
350 " or as an int? */\n" \
351 " addl r2 = @ltoff(_dl_argv), gp\n" \
352 " ;;\n" \
353 " }\n" \
354 " { .mmi\n" \
355 " ld8 r2 = [r2] /* Get the address of _dl_argv. */\n" \
356 " sub out1 = out1, r3 /* Get the new argc. */\n" \
357 " shladd r3 = r3, 3, r0\n" \
358 " ;;\n" \
359 " }\n" \
360 " {\n" \
361 " .mib\n" \
362 " ld8 r17 = [r2] /* Get _dl_argv. */\n" \
363 " add r15 = r11, r3 /* The address of the argv we move */\n" \
364 " ;;\n" \
365 " }\n" \
366 " /* ??? Could probably merge these two loops into 3 bundles.\n" \
367 " using predication to control which set of copies we're on. */\n" \
368 "1: /* Copy argv. */\n" \
369 " { .mfi\n" \
370 " ld8 r16 = [r15], 8 /* Load the value in the old argv. */\n" \
371 " ;;\n" \
372 " }\n" \
373 " { .mib\n" \
374 " st8 [r11] = r16, 8 /* Store it in the new argv. */\n" \
375 " cmp.ne p6, p7 = 0, r16\n" \
376 "(p6) br.cond.dptk.few 1b\n" \
377 " ;;\n" \
378 " }\n" \
379 " { .mmi\n" \
380 " mov out3 = r11\n" \
381 " sub r17 = r17, r3 /* Substract _dl_skip_args. */\n" \
382 " addl out0 = @gprel(_rtld_local), gp\n" \
383 " }\n" \
384 "1: /* Copy env. */\n" \
385 " { .mfi\n" \
386 " ld8 r16 = [r15], 8 /* Load the value in the old env. */\n" \
387 " ;;\n" \
388 " }\n" \
389 " { .mib\n" \
390 " st8 [r11] = r16, 8 /* Store it in the new env. */\n" \
391 " cmp.ne p6, p7 = 0, r16\n" \
392 "(p6) br.cond.dptk.few 1b\n" \
393 " ;;\n" \
394 " }\n" \
395 " { .mmb\n" \
396 " st8 [r10] = out1 /* Record the new argc. */\n" \
397 " ld8 out0 = [out0] /* get the linkmap */\n" \
398 " }\n" \
399 " { .mmb\n" \
400 " st8 [r2] = r17 /* Load the new _dl_argv. */\n" \
401 " br.call.sptk.many b0 = _dl_init_internal#\n" \
402 " ;;\n" \
403 " }\n" \
404 " /* Pass our finializer function to the user,\n" \
405 " and jump to the user's entry point. */\n" \
406 " { .mmi\n" \
407 " ld8 r3 = [loc2], 8\n" \
408 " mov b0 = r0\n" \
409 " }\n" \
410 " { .mmi\n" \
411 " addl ret0 = @ltoff(@fptr(_dl_fini#)), gp\n" \
412 " ;;\n" \
413 " mov b6 = r3\n" \
414 " }\n" \
415 " { .mmi\n" \
416 " ld8 ret0 = [ret0]\n" \
417 " ld8 gp = [loc2]\n" \
418 " mov ar.pfs = loc0\n" \
419 " ;;\n" \
420 " }\n" \
421 " { .mfb\n" \
422 " br.sptk.many b6\n" \
423 " ;;\n" \
424 " }\n" \
425 " .endp _dl_start_user#\n" \
426 ".previous\n");
427
428
429 #ifndef RTLD_START_SPECIAL_INIT
430 #define RTLD_START_SPECIAL_INIT /* nothing */
431 #endif
432
433 /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or TLS
434 variable, so undefined references should not be allowed to define the
435 value.
436 ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
437 of the main executable's symbols, as for a COPY reloc, which we don't
438 use. */
439 /* ??? Ignore *MSB for now. */
440 #if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD)
441 #define elf_machine_type_class(type) \
442 (((type) == R_IA64_IPLTLSB || (type) == R_IA64_DTPMOD64LSB \
443 || (type) == R_IA64_DTPREL64LSB || (type) == R_IA64_TPREL64LSB) \
444 * ELF_RTYPE_CLASS_PLT)
445 #else
446 #define elf_machine_type_class(type) \
447 (((type) == R_IA64_IPLTLSB) * ELF_RTYPE_CLASS_PLT)
448 #endif
449
450 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
451 #define ELF_MACHINE_JMP_SLOT R_IA64_IPLTLSB
452
453 /* According to the IA-64 specific documentation, Rela is always used. */
454 #define ELF_MACHINE_NO_REL 1
455
456 /* Return the address of the entry point. */
457 #define ELF_MACHINE_START_ADDRESS(map, start) \
458 DL_STATIC_FUNCTION_ADDRESS (map, start)
459
460 #define elf_machine_profile_fixup_plt(l, reloc, rel_addr, value) \
461 elf_machine_fixup_plt (l, reloc, rel_addr, value)
462
463 #define elf_machine_profile_plt(reloc_addr) ((Elf64_Addr) (reloc_addr))
464
465 /* Fixup a PLT entry to bounce directly to the function at VALUE. */
466 static inline Elf64_Addr
467 elf_machine_fixup_plt (struct link_map *l, lookup_t t,
468 const Elf64_Rela *reloc,
469 Elf64_Addr *reloc_addr, Elf64_Addr value)
470 {
471 /* l is the link_map for the caller, t is the link_map for the object
472 * being called */
473 /* got has already been relocated in elf_get_dynamic_info() */
474 reloc_addr[1] = t->l_info[DT_PLTGOT]->d_un.d_ptr;
475 /* we need a "release" here to ensure that the gp is visible before
476 the code entry point is updated: */
477 ((volatile Elf64_Addr *) reloc_addr)[0] = value;
478 return (Elf64_Addr) reloc_addr;
479 }
480
481 /* Return the final value of a plt relocation. */
482 static inline Elf64_Addr
483 elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
484 Elf64_Addr value)
485 {
486 /* No need to handle rel vs rela since IA64 is rela only */
487 return value + reloc->r_addend;
488 }
489
490 #endif /* !dl_machine_h */
491
492 #ifdef RESOLVE_MAP
493
494 #define R_IA64_TYPE(R) ((R) & -8)
495 #define R_IA64_FORMAT(R) ((R) & 7)
496
497 #define R_IA64_FORMAT_32MSB 4
498 #define R_IA64_FORMAT_32LSB 5
499 #define R_IA64_FORMAT_64MSB 6
500 #define R_IA64_FORMAT_64LSB 7
501
502
503 /* Perform the relocation specified by RELOC and SYM (which is fully
504 resolved). MAP is the object containing the reloc. */
505 static inline void
506 elf_machine_rela (struct link_map *map,
507 const Elf64_Rela *reloc,
508 const Elf64_Sym *sym,
509 const struct r_found_version *version,
510 Elf64_Addr *const reloc_addr)
511 {
512 const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
513 Elf64_Addr value;
514
515 #if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC && !defined SHARED
516 /* This is defined in rtld.c, but nowhere in the static libc.a; make the
517 reference weak so static programs can still link. This declaration
518 cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP)
519 because rtld.c contains the common defn for _dl_rtld_map, which is
520 incompatible with a weak decl in the same file. */
521 weak_extern (_dl_rtld_map);
522 #endif
523
524 /* We cannot use a switch here because we cannot locate the switch
525 jump table until we've self-relocated. */
526
527 #if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
528 if (__builtin_expect (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_REL64LSB),
529 0))
530 {
531 assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB);
532 value = *reloc_addr;
533 # if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
534 /* Already done in dynamic linker. */
535 if (map != &GL(dl_rtld_map))
536 # endif
537 value += map->l_addr;
538 }
539 else
540 #endif
541 if (__builtin_expect (r_type == R_IA64_NONE, 0))
542 return;
543 else
544 {
545 struct link_map *sym_map;
546
547 /* RESOLVE_MAP() will return NULL if it fail to locate the symbol. */
548 if ((sym_map = RESOLVE_MAP (&sym, version, r_type)))
549 {
550 value = sym_map->l_addr + sym->st_value + reloc->r_addend;
551
552 if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DIR64LSB))
553 ;/* No adjustment. */
554 else if (r_type == R_IA64_IPLTLSB)
555 {
556 elf_machine_fixup_plt (NULL, sym_map, reloc, reloc_addr, value);
557 return;
558 }
559 else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_FPTR64LSB))
560 value = _dl_make_fptr (sym_map, sym, value);
561 else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_PCREL64LSB))
562 value -= (Elf64_Addr) reloc_addr & -16;
563 #if defined USE_TLS && (!defined RTLD_BOOTSTRAP || defined USE___THREAD)
564 else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DTPMOD64LSB))
565 # ifdef RTLD_BOOTSTRAP
566 /* During startup the dynamic linker is always index 1. */
567 value = 1;
568 # else
569 /* Get the information from the link map returned by the
570 resolv function. */
571 value = sym_map->l_tls_modid;
572 else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DTPREL64LSB))
573 value -= sym_map->l_addr;
574 # endif
575 else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_TPREL64LSB))
576 {
577 # ifndef RTLD_BOOTSTRAP
578 CHECK_STATIC_TLS (map, sym_map);
579 # endif
580 value += sym_map->l_tls_offset - sym_map->l_addr;
581 }
582 #endif
583 else
584 assert (! "unexpected dynamic reloc type");
585 }
586 else
587 value = 0;
588 }
589
590 /* ??? Ignore MSB and Instruction format for now. */
591 if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_64LSB)
592 *reloc_addr = value;
593 else if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_32LSB)
594 *(int *) reloc_addr = value;
595 else if (r_type == R_IA64_IPLTLSB)
596 {
597 reloc_addr[0] = 0;
598 reloc_addr[1] = 0;
599 }
600 else
601 assert (! "unexpected dynamic reloc format");
602 }
603
604 /* Let do-rel.h know that on IA-64 if l_addr is 0, all RELATIVE relocs
605 can be skipped. */
606 #define ELF_MACHINE_REL_RELATIVE 1
607
608 static inline void
609 elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
610 Elf64_Addr *const reloc_addr)
611 {
612 /* ??? Ignore MSB and Instruction format for now. */
613 assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB);
614
615 *reloc_addr += l_addr;
616 }
617
618 /* Perform a RELATIVE reloc on the .got entry that transfers to the .plt. */
619 static inline void
620 elf_machine_lazy_rel (struct link_map *map,
621 Elf64_Addr l_addr, const Elf64_Rela *reloc)
622 {
623 Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
624 const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
625
626 if (r_type == R_IA64_IPLTLSB)
627 {
628 reloc_addr[0] += l_addr;
629 reloc_addr[1] += l_addr;
630 }
631 else if (r_type == R_IA64_NONE)
632 return;
633 else
634 assert (! "unexpected PLT reloc type");
635 }
636
637 #endif /* RESOLVE_MAP */
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