1 /* Machine-dependent ELF dynamic relocation inline functions. PA-RISC version.
2 Copyright (C) 1995-2023 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, see
17 <https://www.gnu.org/licenses/>. */
18
19 #ifndef dl_machine_h
20 #define dl_machine_h 1
21
22 #define ELF_MACHINE_NAME "hppa"
23
24 #include <sys/param.h>
25 #include <assert.h>
26 #include <string.h>
27 #include <link.h>
28 #include <errno.h>
29 #include <dl-fptr.h>
30 #include <abort-instr.h>
31 #include <tls.h>
32 #include <dl-static-tls.h>
33 #include <dl-machine-rel.h>
34
35 /* These two definitions must match the definition of the stub in
36 bfd/elf32-hppa.c (see plt_stub[]).
37
38 a. Define the size of the *entire* stub we place at the end of the PLT
39 table (right up against the GOT).
40
41 b. Define the number of bytes back from the GOT to the entry point of
42 the PLT stub. You see the PLT stub must be entered in the middle
43 so it can depwi to find it's own address (long jump stub)
44
45 c. Define the size of a single PLT entry so we can jump over the
46 last entry to get the stub address */
47
48 #define SIZEOF_PLT_STUB (7*4)
49 #define GOT_FROM_PLT_STUB (4*4)
50 #define PLT_ENTRY_SIZE (2*4)
51
52 /* The gp slot in the function descriptor contains the relocation offset
53 before resolution. To distinguish between a resolved gp value and an
54 unresolved relocation offset we set an unused bit in the relocation
55 offset. This would allow us to do a synchronzied two word update
56 using this bit (interlocked update), but instead of waiting for the
57 update we simply recompute the gp value given that we know the ip. */
58 #define PA_GP_RELOC 1
59
60 /* Initialize the function descriptor table before relocations */
61 static inline void
62 __hppa_init_bootstrap_fdesc_table (struct link_map *map)
63 {
64 ElfW(Addr) *boot_table;
65
66 /* Careful: this will be called before got has been relocated... */
67 ELF_MACHINE_LOAD_ADDRESS(boot_table,_dl_boot_fptr_table);
68
69 map->l_mach.fptr_table_len = ELF_MACHINE_BOOT_FPTR_TABLE_LEN;
70 map->l_mach.fptr_table = boot_table;
71 }
72
73 #define ELF_MACHINE_BEFORE_RTLD_RELOC(map, dynamic_info) \
74 __hppa_init_bootstrap_fdesc_table (map); \
75 _dl_fptr_init();
76
77 /* Return nonzero iff ELF header is compatible with the running host. */
78 static inline int
79 elf_machine_matches_host (const Elf32_Ehdr *ehdr)
80 {
81 return ehdr->e_machine == EM_PARISC;
82 }
83
84 /* Return the link-time address of _DYNAMIC. */
85 static inline Elf32_Addr
86 elf_machine_dynamic (void) __attribute__ ((const));
87
88 static inline Elf32_Addr
89 elf_machine_dynamic (void)
90 {
91 Elf32_Addr dynamic;
92
93 asm ("bl 1f,%0\n"
94 " addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 1),%0\n"
95 "1: ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 5)(%%r1),%0\n"
96 : "=r" (dynamic) : : "r1");
97
98 return dynamic;
99 }
100
101 /* Return the run-time load address of the shared object. */
102 static inline Elf32_Addr
103 elf_machine_load_address (void) __attribute__ ((const));
104
105 static inline Elf32_Addr
106 elf_machine_load_address (void)
107 {
108 Elf32_Addr dynamic;
109
110 asm (
111 " bl 1f,%0\n"
112 " addil L'_DYNAMIC - ($PIC_pcrel$0 - 1),%0\n"
113 "1: ldo R'_DYNAMIC - ($PIC_pcrel$0 - 5)(%%r1),%0\n"
114 : "=r" (dynamic) : : "r1");
115
116 return dynamic - elf_machine_dynamic ();
117 }
118
119 /* Fixup a PLT entry to bounce directly to the function at VALUE. */
120 static inline struct fdesc __attribute__ ((always_inline))
121 elf_machine_fixup_plt (struct link_map *map, lookup_t t,
122 const ElfW(Sym) *refsym, const ElfW(Sym) *sym,
123 const Elf32_Rela *reloc,
124 Elf32_Addr *reloc_addr, struct fdesc value)
125 {
126 volatile Elf32_Addr *rfdesc = reloc_addr;
127 /* map is the link_map for the caller, t is the link_map for the object
128 being called */
129
130 /* We would like the function descriptor to be double word aligned. This
131 helps performance (ip and gp then reside on the same cache line) and
132 we can update the pair atomically with a single store. The linker
133 now ensures this alignment but we still have to handle old code. */
134 if ((unsigned int)reloc_addr & 7)
135 {
136 /* Need to ensure that the gp is visible before the code
137 entry point is updated */
138 rfdesc[1] = value.gp;
139 atomic_full_barrier();
140 rfdesc[0] = value.ip;
141 }
142 else
143 {
144 /* Update pair atomically with floating point store. */
145 union { ElfW(Word) v[2]; double d; } u;
146
147 u.v[0] = value.ip;
148 u.v[1] = value.gp;
149 *(volatile double *)rfdesc = u.d;
150 }
151 return value;
152 }
153
154 /* Return the final value of a plt relocation. */
155 static inline struct fdesc
156 elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc,
157 struct fdesc value)
158 {
159 /* We are rela only, return a function descriptor as a plt entry. */
160 return (struct fdesc) { value.ip + reloc->r_addend, value.gp };
161 }
162
163 /* Set up the loaded object described by L so its unrelocated PLT
164 entries will jump to the on-demand fixup code in dl-runtime.c. */
165
166 static inline int
167 elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
168 int lazy, int profile)
169 {
170 Elf32_Addr *got = NULL;
171 Elf32_Addr l_addr, iplt, jmprel, end_jmprel, r_type, r_sym;
172 const Elf32_Rela *reloc;
173 struct fdesc *fptr;
174 static union {
175 unsigned char c[8];
176 Elf32_Addr i[2];
177 } sig = {{0x00,0xc0,0xff,0xee, 0xde,0xad,0xbe,0xef}};
178
179 /* Initialize dp register for main executable. */
180 if (l->l_main_map)
181 {
182 register Elf32_Addr dp asm ("%r27");
183
184 dp = D_PTR (l, l_info[DT_PLTGOT]);
185 asm volatile ("" : : "r" (dp));
186 }
187
188 /* If we don't have a PLT we can just skip all this... */
189 if (__builtin_expect (l->l_info[DT_JMPREL] == NULL,0))
190 return lazy;
191
192 /* All paths use these values */
193 l_addr = l->l_addr;
194 jmprel = D_PTR(l, l_info[DT_JMPREL]);
195 end_jmprel = jmprel + l->l_info[DT_PLTRELSZ]->d_un.d_val;
196
197 extern void _dl_runtime_resolve (void);
198 extern void _dl_runtime_profile (void);
199
200 /* Linking lazily */
201 if (lazy)
202 {
203 /* FIXME: Search for the got, but backwards through the relocs, technically we should
204 find it on the first try. However, assuming the relocs got out of order the
205 routine is made a bit more robust by searching them all in case of failure. */
206 for (iplt = (end_jmprel - sizeof (Elf32_Rela)); iplt >= jmprel; iplt -= sizeof (Elf32_Rela))
207 {
208
209 reloc = (const Elf32_Rela *) iplt;
210 r_type = ELF32_R_TYPE (reloc->r_info);
211 r_sym = ELF32_R_SYM (reloc->r_info);
212
213 got = (Elf32_Addr *) (reloc->r_offset + l_addr + PLT_ENTRY_SIZE + SIZEOF_PLT_STUB);
214
215 /* If we aren't an IPLT, and we aren't NONE then it's a bad reloc */
216 if (__builtin_expect (r_type != R_PARISC_IPLT, 0))
217 {
218 if (__builtin_expect (r_type != R_PARISC_NONE, 0))
219 _dl_reloc_bad_type (l, r_type, 1);
220 continue;
221 }
222
223 /* Check for the plt_stub that binutils placed here for us
224 to use with _dl_runtime_resolve */
225 if (got[-2] != sig.i[0] || got[-1] != sig.i[1])
226 {
227 got = NULL; /* Not the stub... keep looking */
228 }
229 else
230 {
231 /* Found the GOT! */
232 register Elf32_Addr ltp __asm__ ("%r19");
233
234 /* Identify this shared object. Second entry in the got. */
235 got[1] = (Elf32_Addr) l;
236
237 /* This function will be called to perform the relocation. */
238 if (__builtin_expect (!profile, 1))
239 {
240 /* If a static application called us, then _dl_runtime_resolve is not
241 a function descriptor, but the *real* address of the function... */
242 if((unsigned long) &_dl_runtime_resolve & 3)
243 {
244 got[-2] = (Elf32_Addr) ((struct fdesc *)
245 ((unsigned long) &_dl_runtime_resolve & ~3))->ip;
246 }
247 else
248 {
249 /* Static executable! */
250 got[-2] = (Elf32_Addr) &_dl_runtime_resolve;
251 }
252 }
253 else
254 {
255 if (GLRO(dl_profile) != NULL
256 && _dl_name_match_p (GLRO(dl_profile), l))
257 {
258 /* This is the object we are looking for. Say that
259 we really want profiling and the timers are
260 started. */
261 GL(dl_profile_map) = l;
262 }
263
264 if((unsigned long) &_dl_runtime_profile & 3)
265 {
266 got[-2] = (Elf32_Addr) ((struct fdesc *)
267 ((unsigned long) &_dl_runtime_profile & ~3))->ip;
268 }
269 else
270 {
271 /* Static executable */
272 got[-2] = (Elf32_Addr) &_dl_runtime_profile;
273 }
274 }
275 /* Plunk in the gp of this function descriptor so we
276 can make the call to _dl_runtime_xxxxxx */
277 got[-1] = ltp;
278 break;
279 /* Done looking for the GOT, and stub is setup */
280 } /* else we found the GOT */
281 } /* for, walk the relocs backwards */
282
283 if(!got)
284 return 0; /* No lazy linking for you! */
285
286 /* Process all the relocs, now that we know the GOT... */
287 for (iplt = jmprel; iplt < end_jmprel; iplt += sizeof (Elf32_Rela))
288 {
289 reloc = (const Elf32_Rela *) iplt;
290 r_type = ELF32_R_TYPE (reloc->r_info);
291 r_sym = ELF32_R_SYM (reloc->r_info);
292
293 if (__builtin_expect (r_type == R_PARISC_IPLT, 1))
294 {
295 fptr = (struct fdesc *) (reloc->r_offset + l_addr);
296 if (r_sym != 0)
297 {
298 /* Relocate the pointer to the stub. */
299 fptr->ip = (Elf32_Addr) got - GOT_FROM_PLT_STUB;
300
301 /* Instead of the LTP value, we put the reloc offset
302 here. The trampoline code will load the proper
303 LTP and pass the reloc offset to the fixup
304 function. */
305 fptr->gp = (iplt - jmprel) | PA_GP_RELOC;
306 } /* r_sym != 0 */
307 else
308 {
309 /* Relocate this *ABS* entry. */
310 fptr->ip = reloc->r_addend + l_addr;
311 fptr->gp = D_PTR (l, l_info[DT_PLTGOT]);
312 }
313 } /* r_type == R_PARISC_IPLT */
314 } /* for all the relocations */
315 } /* if lazy */
316 else
317 {
318 for (iplt = jmprel; iplt < end_jmprel; iplt += sizeof (Elf32_Rela))
319 {
320 reloc = (const Elf32_Rela *) iplt;
321 r_type = ELF32_R_TYPE (reloc->r_info);
322 r_sym = ELF32_R_SYM (reloc->r_info);
323
324 if (__builtin_expect ((r_type == R_PARISC_IPLT) && (r_sym == 0), 1))
325 {
326 fptr = (struct fdesc *) (reloc->r_offset + l_addr);
327 /* Relocate this *ABS* entry, set only the gp, the rest is set later
328 when elf_machine_rela_relative is called (WITHOUT the linkmap) */
329 fptr->gp = D_PTR (l, l_info[DT_PLTGOT]);
330 } /* r_type == R_PARISC_IPLT */
331 } /* for all the relocations */
332 }
333 return lazy;
334 }
335
336
337 /* Names of the architecture-specific auditing callback functions. */
338 #define ARCH_LA_PLTENTER hppa_gnu_pltenter
339 #define ARCH_LA_PLTEXIT hppa_gnu_pltexit
340
341 /* Adjust DL_STACK_END to get value we want in __libc_stack_end. */
342 #define DL_STACK_END(cookie) \
343 ((void *) (((long) (cookie)) + 0x160))
344
345 /* Initial entry point code for the dynamic linker.
346 The C function `_dl_start' is the real entry point;
347 its return value is the user program's entry point. */
348
349 #define RTLD_START \
350 /* Set up dp for any non-PIC lib constructors that may be called. */ \
351 static struct link_map * __attribute__((used)) \
352 set_dp (struct link_map *map) \
353 { \
354 register Elf32_Addr dp asm ("%r27"); \
355 dp = D_PTR (map, l_info[DT_PLTGOT]); \
356 asm volatile ("" : : "r" (dp)); \
357 return map; \
358 } \
359 \
360 asm ( \
361 " .text\n" \
362 " .globl _start\n" \
363 " .type _start,@function\n" \
364 "_start:\n" \
365 /* The kernel does not give us an initial stack frame. */ \
366 " ldo 64(%sp),%sp\n" \
367 \
368 /* We need the LTP, and we need it now. \
369 $PIC_pcrel$0 points 8 bytes past the current instruction, \
370 just like a branch reloc. This sequence gets us the \
371 runtime address of _DYNAMIC. */ \
372 " bl 0f,%r19\n" \
373 " addil L'_DYNAMIC - ($PIC_pcrel$0 - 1),%r19\n" \
374 "0: ldo R'_DYNAMIC - ($PIC_pcrel$0 - 5)(%r1),%r26\n" \
375 \
376 /* The link time address is stored in the first entry of the \
377 GOT. */ \
378 " addil L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 9),%r19\n" \
379 " ldw R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 13)(%r1),%r20\n" \
380 \
381 " sub %r26,%r20,%r20\n" /* Calculate load offset */ \
382 \
383 /* Rummage through the dynamic entries, looking for \
384 DT_PLTGOT. */ \
385 " ldw,ma 8(%r26),%r19\n" \
386 "1: cmpib,=,n 3,%r19,2f\n" /* tag == DT_PLTGOT? */ \
387 " cmpib,<>,n 0,%r19,1b\n" \
388 " ldw,ma 8(%r26),%r19\n" \
389 \
390 /* Uh oh! We didn't find one. Abort. */ \
391 " iitlbp %r0,(%sr0,%r0)\n" \
392 \
393 "2: ldw -4(%r26),%r19\n" /* Found it, load value. */ \
394 " add %r19,%r20,%r19\n" /* And add the load offset. */ \
395 \
396 /* Our initial stack layout is rather different from everyone \
397 else's due to the unique PA-RISC ABI. As far as I know it \
398 looks like this: \
399 \
400 ----------------------------------- (this frame created above) \
401 | 32 bytes of magic | \
402 |---------------------------------| \
403 | 32 bytes argument/sp save area | \
404 |---------------------------------| ((current->mm->env_end) \
405 | N bytes of slack | + 63 & ~63) \
406 |---------------------------------| \
407 | envvar and arg strings | \
408 |---------------------------------| \
409 | ELF auxiliary info | \
410 | (up to 28 words) | \
411 |---------------------------------| \
412 | Environment variable pointers | \
413 | upwards to NULL | \
414 |---------------------------------| \
415 | Argument pointers | \
416 | upwards to NULL | \
417 |---------------------------------| \
418 | argc (1 word) | \
419 ----------------------------------- \
420 \
421 So, obviously, we can't just pass %sp to _dl_start. That's \
422 okay, argv-4 will do just fine. \
423 \
424 This is always within range so we'll be okay. */ \
425 " bl _dl_start,%rp\n" \
426 " ldo -4(%r24),%r26\n" \
427 \
428 " .globl _dl_start_user\n" \
429 " .type _dl_start_user,@function\n" \
430 "_dl_start_user:\n" \
431 /* Save the entry point in %r3. */ \
432 " copy %ret0,%r3\n" \
433 \
434 /* The loader adjusts argc, argv, env, and the aux vectors \
435 directly on the stack to remove any arguments used for \
436 direct loader invocation. Thus, argc and argv must be \
437 reloaded from from _dl_argc and _dl_argv. */ \
438 \
439 /* Load main_map from _rtld_local and setup dp. */ \
440 " addil LT'_rtld_local,%r19\n" \
441 " ldw RT'_rtld_local(%r1),%r26\n" \
442 " bl set_dp, %r2\n" \
443 " ldw 0(%r26),%r26\n" \
444 " copy %ret0,%r26\n" \
445 \
446 /* Load argc from _dl_argc. */ \
447 " addil LT'_dl_argc,%r19\n" \
448 " ldw RT'_dl_argc(%r1),%r20\n" \
449 " ldw 0(%r20),%r25\n" \
450 " stw %r25,-40(%sp)\n" \
451 \
452 /* Same for argv with _dl_argv. */ \
453 " addil LT'_dl_argv,%r19\n" \
454 " ldw RT'_dl_argv(%r1),%r20\n" \
455 " ldw 0(%r20),%r24\n" \
456 " stw %r24,-44(%sp)\n" \
457 \
458 /* envp = argv + argc + 1 */ \
459 " sh2add %r25,%r24,%r23\n" \
460 \
461 /* Call _dl_init(main_map, argc, argv, envp). */ \
462 " bl _dl_init,%r2\n" \
463 " ldo 4(%r23),%r23\n" /* delay slot */ \
464 \
465 /* Reload argc, argv to the registers start.S expects. */ \
466 " ldw -40(%sp),%r25\n" \
467 " ldw -44(%sp),%r24\n" \
468 \
469 /* _dl_fini is a local function in the loader, so we construct \
470 a false OPD here and pass this to the application. */ \
471 /* FIXME: Should be able to use P%, and LR RR to have the \
472 the linker construct a proper OPD. */ \
473 " .section .data\n" \
474 "__dl_fini_plabel:\n" \
475 " .word _dl_fini\n" \
476 " .word 0xdeadbeef\n" \
477 " .previous\n" \
478 \
479 /* %r3 contains a function pointer, we need to mask out the \
480 lower bits and load the gp and jump address. */ \
481 " depi 0,31,2,%r3\n" \
482 " ldw 0(%r3),%r2\n" \
483 " addil LT'__dl_fini_plabel,%r19\n" \
484 " ldw RT'__dl_fini_plabel(%r1),%r23\n" \
485 " stw %r19,4(%r23)\n" \
486 " ldw 4(%r3),%r19\n" /* load the object's gp */ \
487 " bv %r0(%r2)\n" \
488 " depi 2,31,2,%r23\n" /* delay slot */ \
489 );
490
491 /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
492 a TLS variable, so references should not be allowed to define the value.
493 ELF_RTYPE_CLASS_COPY iff TYPE should not be allowed to resolve to one
494 of the main executable's symbols, as for a COPY reloc. */
495 #if !defined RTLD_BOOTSTRAP
496 # define elf_machine_type_class(type) \
497 ((((type) == R_PARISC_IPLT \
498 || (type) == R_PARISC_EPLT \
499 || (type) == R_PARISC_TLS_DTPMOD32 \
500 || (type) == R_PARISC_TLS_DTPOFF32 \
501 || (type) == R_PARISC_TLS_TPREL32) \
502 * ELF_RTYPE_CLASS_PLT) \
503 | (((type) == R_PARISC_COPY) * ELF_RTYPE_CLASS_COPY))
504 #else
505 #define elf_machine_type_class(type) \
506 ((((type) == R_PARISC_IPLT \
507 || (type) == R_PARISC_EPLT) \
508 * ELF_RTYPE_CLASS_PLT) \
509 | (((type) == R_PARISC_COPY) * ELF_RTYPE_CLASS_COPY))
510 #endif
511
512 /* Used by the runtime in fixup to figure out if reloc is *really* PLT */
513 #define ELF_MACHINE_JMP_SLOT R_PARISC_IPLT
514 #define ELF_MACHINE_SIZEOF_JMP_SLOT PLT_ENTRY_SIZE
515
516 /* Return the address of the entry point. */
517 #define ELF_MACHINE_START_ADDRESS(map, start) \
518 ({ \
519 ElfW(Addr) addr; \
520 DL_DT_FUNCTION_ADDRESS(map, start, static, addr) \
521 addr; \
522 })
523
524 /* We define an initialization functions. This is called very early in
525 * _dl_sysdep_start. */
526 #define DL_PLATFORM_INIT dl_platform_init ()
527
528 static inline void __attribute__ ((unused))
529 dl_platform_init (void)
530 {
531 if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
532 /* Avoid an empty string which would disturb us. */
533 GLRO(dl_platform) = NULL;
534 }
535
536 #endif /* !dl_machine_h */
537
538 /* These are only actually used where RESOLVE_MAP is defined, anyway. */
539 #ifdef RESOLVE_MAP
540
541 #define reassemble_21(as21) \
542 ( (((as21) & 0x100000) >> 20) \
543 | (((as21) & 0x0ffe00) >> 8) \
544 | (((as21) & 0x000180) << 7) \
545 | (((as21) & 0x00007c) << 14) \
546 | (((as21) & 0x000003) << 12))
547
548 #define reassemble_14(as14) \
549 ( (((as14) & 0x1fff) << 1) \
550 | (((as14) & 0x2000) >> 13))
551
552 static void __attribute__((always_inline))
553 elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
554 const Elf32_Rela *reloc,
555 const Elf32_Sym *sym,
556 const struct r_found_version *version,
557 void *const reloc_addr_arg,
558 int skip_ifunc)
559 {
560 Elf32_Addr *const reloc_addr = reloc_addr_arg;
561 const Elf32_Sym *const refsym = sym;
562 unsigned long const r_type = ELF32_R_TYPE (reloc->r_info);
563 struct link_map *sym_map;
564 Elf32_Addr value;
565
566 /* RESOLVE_MAP will return a null value for undefined syms, and
567 non-null for all other syms. In particular, relocs with no
568 symbol (symbol index of zero), also called *ABS* relocs, will be
569 resolved to MAP. (The first entry in a symbol table is all
570 zeros, and an all zero Elf32_Sym has a binding of STB_LOCAL.)
571 See RESOLVE_MAP definition in elf/dl-reloc.c */
572 # ifdef RTLD_BOOTSTRAP
573 sym_map = map;
574 # else
575 sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
576 # endif
577
578 if (sym_map)
579 {
580 value = SYMBOL_ADDRESS (sym_map, sym, true);
581 value += reloc->r_addend;
582 }
583 else
584 value = 0;
585
586 switch (r_type)
587 {
588 case R_PARISC_DIR32:
589 /* .eh_frame can have unaligned relocs. */
590 if ((unsigned long) reloc_addr_arg & 3)
591 {
592 char *rel_addr = (char *) reloc_addr_arg;
593 rel_addr[0] = value >> 24;
594 rel_addr[1] = value >> 16;
595 rel_addr[2] = value >> 8;
596 rel_addr[3] = value;
597 return;
598 }
599 break;
600
601 case R_PARISC_DIR21L:
602 {
603 unsigned int insn = *(unsigned int *)reloc_addr;
604 value = (SYMBOL_ADDRESS (sym_map, sym, true)
605 + ((reloc->r_addend + 0x1000) & -0x2000));
606 value = value >> 11;
607 insn = (insn &~ 0x1fffff) | reassemble_21 (value);
608 *(unsigned int *)reloc_addr = insn;
609 }
610 return;
611
612 case R_PARISC_DIR14R:
613 {
614 unsigned int insn = *(unsigned int *)reloc_addr;
615 value = ((SYMBOL_ADDRESS (sym_map, sym, true) & 0x7ff)
616 + (((reloc->r_addend & 0x1fff) ^ 0x1000) - 0x1000));
617 insn = (insn &~ 0x3fff) | reassemble_14 (value);
618 *(unsigned int *)reloc_addr = insn;
619 }
620 return;
621
622 case R_PARISC_PLABEL32:
623 /* Easy rule: If there is a symbol and it is global, then we
624 need to make a dynamic function descriptor. Otherwise we
625 have the address of a PLT slot for a local symbol which we
626 know to be unique. */
627 if (sym == NULL
628 || sym_map == NULL
629 || ELF32_ST_BIND (sym->st_info) == STB_LOCAL)
630 {
631 break;
632 }
633 /* Set bit 30 to indicate to $$dyncall that this is a PLABEL.
634 We have to do this outside of the generic function descriptor
635 code, since it doesn't know about our requirement for setting
636 protection bits */
637 value = (Elf32_Addr)((unsigned int)_dl_make_fptr (sym_map, sym, value) | 2);
638 break;
639
640 case R_PARISC_PLABEL21L:
641 case R_PARISC_PLABEL14R:
642 {
643 unsigned int insn = *(unsigned int *)reloc_addr;
644
645 if (__builtin_expect (sym == NULL, 0))
646 break;
647
648 value = (Elf32_Addr)((unsigned int)_dl_make_fptr (sym_map, sym, value) | 2);
649
650 if (r_type == R_PARISC_PLABEL21L)
651 {
652 value >>= 11;
653 insn = (insn &~ 0x1fffff) | reassemble_21 (value);
654 }
655 else
656 {
657 value &= 0x7ff;
658 insn = (insn &~ 0x3fff) | reassemble_14 (value);
659 }
660
661 *(unsigned int *)reloc_addr = insn;
662 }
663 return;
664
665 case R_PARISC_IPLT:
666 if (__builtin_expect (sym_map != NULL, 1))
667 {
668 elf_machine_fixup_plt (NULL, sym_map, NULL, NULL, reloc, reloc_addr,
669 DL_FIXUP_MAKE_VALUE(sym_map, value));
670 }
671 else
672 {
673 /* If we get here, it's a (weak) undefined sym. */
674 elf_machine_fixup_plt (NULL, map, NULL, NULL, reloc, reloc_addr,
675 DL_FIXUP_MAKE_VALUE(map, value));
676 }
677 return;
678
679 case R_PARISC_COPY:
680 if (__builtin_expect (sym == NULL, 0))
681 /* This can happen in trace mode if an object could not be
682 found. */
683 break;
684 if (__builtin_expect (sym->st_size > refsym->st_size, 0)
685 || (__builtin_expect (sym->st_size < refsym->st_size, 0)
686 && __builtin_expect (GLRO(dl_verbose), 0)))
687 {
688 const char *strtab;
689
690 strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
691 _dl_error_printf ("%s: Symbol `%s' has different size in shared object, "
692 "consider re-linking\n",
693 RTLD_PROGNAME, strtab + refsym->st_name);
694 }
695 memcpy (reloc_addr_arg, (void *) value,
696 MIN (sym->st_size, refsym->st_size));
697 return;
698
699 #if !defined RTLD_BOOTSTRAP
700 case R_PARISC_TLS_DTPMOD32:
701 value = sym_map->l_tls_modid;
702 break;
703
704 case R_PARISC_TLS_DTPOFF32:
705 /* During relocation all TLS symbols are defined and used.
706 Therefore the offset is already correct. */
707 if (sym != NULL)
708 *reloc_addr = sym->st_value + reloc->r_addend;
709 return;
710
711 case R_PARISC_TLS_TPREL32:
712 /* The offset is negative, forward from the thread pointer */
713 if (sym != NULL)
714 {
715 CHECK_STATIC_TLS (map, sym_map);
716 value = sym_map->l_tls_offset + sym->st_value + reloc->r_addend;
717 }
718 break;
719 #endif /* use TLS */
720
721 case R_PARISC_NONE: /* Alright, Wilbur. */
722 return;
723
724 default:
725 _dl_reloc_bad_type (map, r_type, 0);
726 }
727
728 *reloc_addr = value;
729 }
730
731 /* hppa doesn't have an R_PARISC_RELATIVE reloc, but uses relocs with
732 ELF32_R_SYM (info) == 0 for a similar purpose. */
733 static void __attribute__((always_inline))
734 elf_machine_rela_relative (Elf32_Addr l_addr,
735 const Elf32_Rela *reloc,
736 void *const reloc_addr_arg)
737 {
738 unsigned long const r_type = ELF32_R_TYPE (reloc->r_info);
739 Elf32_Addr *const reloc_addr = reloc_addr_arg;
740 static char msgbuf[] = { "Unknown" };
741 struct link_map map;
742 Elf32_Addr value;
743
744 value = l_addr + reloc->r_addend;
745
746 if (ELF32_R_SYM (reloc->r_info) != 0){
747 _dl_error_printf ("%s: In elf_machine_rela_relative "
748 "ELF32_R_SYM (reloc->r_info) != 0. Aborting.",
749 RTLD_PROGNAME);
750 ABORT_INSTRUCTION; /* Crash. */
751 }
752
753 switch (r_type)
754 {
755 case R_PARISC_DIR32:
756 /* .eh_frame can have unaligned relocs. */
757 if ((unsigned long) reloc_addr_arg & 3)
758 {
759 char *rel_addr = (char *) reloc_addr_arg;
760 rel_addr[0] = value >> 24;
761 rel_addr[1] = value >> 16;
762 rel_addr[2] = value >> 8;
763 rel_addr[3] = value;
764 return;
765 }
766 break;
767
768 case R_PARISC_PLABEL32:
769 break;
770
771 case R_PARISC_IPLT: /* elf_machine_runtime_setup already set gp */
772 break;
773
774 case R_PARISC_NONE:
775 return;
776
777 default: /* Bad reloc, map unknown (really it's the current map) */
778 map.l_name = msgbuf;
779 _dl_reloc_bad_type (&map, r_type, 0);
780 return;
781 }
782
783 *reloc_addr = value;
784 }
785
786 static void __attribute__((always_inline))
787 elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
788 Elf32_Addr l_addr, const Elf32_Rela *reloc,
789 int skip_ifunc)
790 {
791 /* We don't have anything to do here. elf_machine_runtime_setup has
792 done all the relocs already. */
793 }
794
795 #endif /* RESOLVE_MAP */