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Ignore machine-check MSRs
[freebsd-src/fkvm-freebsd.git] / sys / kern / link_elf.c
blob52b3f8f0ba6844b8f9629e9281cf909297c9ccf3
1 /*-
2 * Copyright (c) 1998-2000 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_ddb.h"
31 #include "opt_gdb.h"
32 #include "opt_mac.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #ifdef GPROF
37 #include <sys/gmon.h>
38 #endif
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/malloc.h>
42 #include <sys/mutex.h>
43 #include <sys/mount.h>
44 #include <sys/proc.h>
45 #include <sys/namei.h>
46 #include <sys/fcntl.h>
47 #include <sys/vnode.h>
48 #include <sys/linker.h>
49
50 #include <machine/elf.h>
51
52 #include <security/mac/mac_framework.h>
53
54 #include <vm/vm.h>
55 #include <vm/vm_param.h>
56 #ifdef SPARSE_MAPPING
57 #include <vm/vm_object.h>
58 #include <vm/vm_kern.h>
59 #include <vm/vm_extern.h>
60 #endif
61 #include <vm/pmap.h>
62 #include <vm/vm_map.h>
63
64 #include <sys/link_elf.h>
65
66 #ifdef DDB_CTF
67 #include <net/zlib.h>
68 #endif
69
70 #include "linker_if.h"
71
72 #define MAXSEGS 4
73
74 typedef struct elf_file {
75 struct linker_file lf; /* Common fields */
76 int preloaded; /* Was file pre-loaded */
77 caddr_t address; /* Relocation address */
78 #ifdef SPARSE_MAPPING
79 vm_object_t object; /* VM object to hold file pages */
80 #endif
81 Elf_Dyn* dynamic; /* Symbol table etc. */
82 Elf_Hashelt nbuckets; /* DT_HASH info */
83 Elf_Hashelt nchains;
84 const Elf_Hashelt* buckets;
85 const Elf_Hashelt* chains;
86 caddr_t hash;
87 caddr_t strtab; /* DT_STRTAB */
88 int strsz; /* DT_STRSZ */
89 const Elf_Sym* symtab; /* DT_SYMTAB */
90 Elf_Addr* got; /* DT_PLTGOT */
91 const Elf_Rel* pltrel; /* DT_JMPREL */
92 int pltrelsize; /* DT_PLTRELSZ */
93 const Elf_Rela* pltrela; /* DT_JMPREL */
94 int pltrelasize; /* DT_PLTRELSZ */
95 const Elf_Rel* rel; /* DT_REL */
96 int relsize; /* DT_RELSZ */
97 const Elf_Rela* rela; /* DT_RELA */
98 int relasize; /* DT_RELASZ */
99 caddr_t modptr;
100 const Elf_Sym* ddbsymtab; /* The symbol table we are using */
101 long ddbsymcnt; /* Number of symbols */
102 caddr_t ddbstrtab; /* String table */
103 long ddbstrcnt; /* number of bytes in string table */
104 caddr_t symbase; /* malloc'ed symbold base */
105 caddr_t strbase; /* malloc'ed string base */
106 caddr_t ctftab; /* CTF table */
107 long ctfcnt; /* number of bytes in CTF table */
108 caddr_t ctfoff; /* CTF offset table */
109 caddr_t typoff; /* Type offset table */
110 long typlen; /* Number of type entries. */
111 #ifdef GDB
112 struct link_map gdb; /* hooks for gdb */
113 #endif
114 } *elf_file_t;
115
116 #include <kern/kern_ctf.c>
117
118 static int link_elf_link_common_finish(linker_file_t);
119 static int link_elf_link_preload(linker_class_t cls,
120 const char*, linker_file_t*);
121 static int link_elf_link_preload_finish(linker_file_t);
122 static int link_elf_load_file(linker_class_t, const char*, linker_file_t*);
123 static int link_elf_lookup_symbol(linker_file_t, const char*,
124 c_linker_sym_t*);
125 static int link_elf_symbol_values(linker_file_t, c_linker_sym_t, linker_symval_t*);
126 static int link_elf_search_symbol(linker_file_t, caddr_t value,
127 c_linker_sym_t* sym, long* diffp);
128
129 static void link_elf_unload_file(linker_file_t);
130 static void link_elf_unload_preload(linker_file_t);
131 static int link_elf_lookup_set(linker_file_t, const char *,
132 void ***, void ***, int *);
133 static int link_elf_each_function_name(linker_file_t,
134 int (*)(const char *, void *),
135 void *);
136 static int link_elf_each_function_nameval(linker_file_t,
137 linker_function_nameval_callback_t,
138 void *);
139 static void link_elf_reloc_local(linker_file_t);
140 static Elf_Addr elf_lookup(linker_file_t lf, Elf_Size symidx, int deps);
141
142 static kobj_method_t link_elf_methods[] = {
143 KOBJMETHOD(linker_lookup_symbol, link_elf_lookup_symbol),
144 KOBJMETHOD(linker_symbol_values, link_elf_symbol_values),
145 KOBJMETHOD(linker_search_symbol, link_elf_search_symbol),
146 KOBJMETHOD(linker_unload, link_elf_unload_file),
147 KOBJMETHOD(linker_load_file, link_elf_load_file),
148 KOBJMETHOD(linker_link_preload, link_elf_link_preload),
149 KOBJMETHOD(linker_link_preload_finish, link_elf_link_preload_finish),
150 KOBJMETHOD(linker_lookup_set, link_elf_lookup_set),
151 KOBJMETHOD(linker_each_function_name, link_elf_each_function_name),
152 KOBJMETHOD(linker_each_function_nameval, link_elf_each_function_nameval),
153 KOBJMETHOD(linker_ctf_get, link_elf_ctf_get),
154 { 0, 0 }
155 };
156
157 static struct linker_class link_elf_class = {
158 #if ELF_TARG_CLASS == ELFCLASS32
159 "elf32",
160 #else
161 "elf64",
162 #endif
163 link_elf_methods, sizeof(struct elf_file)
164 };
165
166 static int parse_dynamic(elf_file_t ef);
167 static int relocate_file(elf_file_t ef);
168 static int link_elf_preload_parse_symbols(elf_file_t ef);
169
170 #ifdef GDB
171 static void r_debug_state(struct r_debug *dummy_one,
172 struct link_map *dummy_two);
173
174 /*
175 * A list of loaded modules for GDB to use for loading symbols.
176 */
177 struct r_debug r_debug;
178
179 #define GDB_STATE(s) r_debug.r_state = s; r_debug_state(NULL, NULL);
180
181 /*
182 * Function for the debugger to set a breakpoint on to gain control.
183 */
184 static void
185 r_debug_state(struct r_debug *dummy_one __unused,
186 struct link_map *dummy_two __unused)
187 {
188 }
189
190 static void
191 link_elf_add_gdb(struct link_map *l)
192 {
193 struct link_map *prev;
194
195 l->l_next = NULL;
196
197 if (r_debug.r_map == NULL) {
198 /* Add first. */
199 l->l_prev = NULL;
200 r_debug.r_map = l;
201 } else {
202 /* Append to list. */
203 for (prev = r_debug.r_map; prev->l_next != NULL; prev = prev->l_next)
204 ;
205 l->l_prev = prev;
206 prev->l_next = l;
207 }
208 }
209
210 static void
211 link_elf_delete_gdb(struct link_map *l)
212 {
213 if (l->l_prev == NULL) {
214 /* Remove first. */
215 if ((r_debug.r_map = l->l_next) != NULL)
216 l->l_next->l_prev = NULL;
217 } else {
218 /* Remove any but first. */
219 if ((l->l_prev->l_next = l->l_next) != NULL)
220 l->l_next->l_prev = l->l_prev;
221 }
222 }
223 #endif /* GDB */
224
225 #ifdef __ia64__
226 Elf_Addr link_elf_get_gp(linker_file_t);
227 #endif
228
229 /*
230 * The kernel symbol table starts here.
231 */
232 extern struct _dynamic _DYNAMIC;
233
234 static void
235 link_elf_error(const char *filename, const char *s)
236 {
237 if (filename == NULL)
238 printf("kldload: %s\n", s);
239 else
240 printf("kldload: %s: %s\n", filename, s);
241 }
242
243 /*
244 * Actions performed after linking/loading both the preloaded kernel and any
245 * modules; whether preloaded or dynamicly loaded.
246 */
247 static int
248 link_elf_link_common_finish(linker_file_t lf)
249 {
250 #ifdef GDB
251 elf_file_t ef = (elf_file_t)lf;
252 char *newfilename;
253 #endif
254 int error;
255
256 /* Notify MD code that a module is being loaded. */
257 error = elf_cpu_load_file(lf);
258 if (error)
259 return (error);
260
261 #ifdef GDB
262 GDB_STATE(RT_ADD);
263 ef->gdb.l_addr = lf->address;
264 newfilename = malloc(strlen(lf->filename) + 1, M_LINKER, M_WAITOK);
265 strcpy(newfilename, lf->filename);
266 ef->gdb.l_name = newfilename;
267 ef->gdb.l_ld = ef->dynamic;
268 link_elf_add_gdb(&ef->gdb);
269 GDB_STATE(RT_CONSISTENT);
270 #endif
271
272 return (0);
273 }
274
275 static void
276 link_elf_init(void* arg)
277 {
278 Elf_Dyn *dp;
279 caddr_t modptr, baseptr, sizeptr;
280 elf_file_t ef;
281 char *modname;
282
283 linker_add_class(&link_elf_class);
284
285 dp = (Elf_Dyn*) &_DYNAMIC;
286 modname = NULL;
287 modptr = preload_search_by_type("elf" __XSTRING(__ELF_WORD_SIZE) " kernel");
288 if (modptr == NULL)
289 modptr = preload_search_by_type("elf kernel");
290 if (modptr)
291 modname = (char *)preload_search_info(modptr, MODINFO_NAME);
292 if (modname == NULL)
293 modname = "kernel";
294 linker_kernel_file = linker_make_file(modname, &link_elf_class);
295 if (linker_kernel_file == NULL)
296 panic("link_elf_init: Can't create linker structures for kernel");
297
298 ef = (elf_file_t) linker_kernel_file;
299 ef->preloaded = 1;
300 ef->address = 0;
301 #ifdef SPARSE_MAPPING
302 ef->object = 0;
303 #endif
304 ef->dynamic = dp;
305
306 if (dp)
307 parse_dynamic(ef);
308 linker_kernel_file->address = (caddr_t) KERNBASE;
309 linker_kernel_file->size = -(intptr_t)linker_kernel_file->address;
310
311 if (modptr) {
312 ef->modptr = modptr;
313 baseptr = preload_search_info(modptr, MODINFO_ADDR);
314 if (baseptr)
315 linker_kernel_file->address = *(caddr_t *)baseptr;
316 sizeptr = preload_search_info(modptr, MODINFO_SIZE);
317 if (sizeptr)
318 linker_kernel_file->size = *(size_t *)sizeptr;
319 }
320 (void)link_elf_preload_parse_symbols(ef);
321
322 #ifdef GDB
323 r_debug.r_map = NULL;
324 r_debug.r_brk = r_debug_state;
325 r_debug.r_state = RT_CONSISTENT;
326 #endif
327
328 (void)link_elf_link_common_finish(linker_kernel_file);
329 linker_kernel_file->flags |= LINKER_FILE_LINKED;
330 }
331
332 SYSINIT(link_elf, SI_SUB_KLD, SI_ORDER_THIRD, link_elf_init, 0);
333
334 static int
335 link_elf_preload_parse_symbols(elf_file_t ef)
336 {
337 caddr_t pointer;
338 caddr_t ssym, esym, base;
339 caddr_t strtab;
340 int strcnt;
341 Elf_Sym* symtab;
342 int symcnt;
343
344 if (ef->modptr == NULL)
345 return 0;
346 pointer = preload_search_info(ef->modptr, MODINFO_METADATA|MODINFOMD_SSYM);
347 if (pointer == NULL)
348 return 0;
349 ssym = *(caddr_t *)pointer;
350 pointer = preload_search_info(ef->modptr, MODINFO_METADATA|MODINFOMD_ESYM);
351 if (pointer == NULL)
352 return 0;
353 esym = *(caddr_t *)pointer;
354
355 base = ssym;
356
357 symcnt = *(long *)base;
358 base += sizeof(long);
359 symtab = (Elf_Sym *)base;
360 base += roundup(symcnt, sizeof(long));
361
362 if (base > esym || base < ssym) {
363 printf("Symbols are corrupt!\n");
364 return EINVAL;
365 }
366
367 strcnt = *(long *)base;
368 base += sizeof(long);
369 strtab = base;
370 base += roundup(strcnt, sizeof(long));
371
372 if (base > esym || base < ssym) {
373 printf("Symbols are corrupt!\n");
374 return EINVAL;
375 }
376
377 ef->ddbsymtab = symtab;
378 ef->ddbsymcnt = symcnt / sizeof(Elf_Sym);
379 ef->ddbstrtab = strtab;
380 ef->ddbstrcnt = strcnt;
381
382 return 0;
383 }
384
385 static int
386 parse_dynamic(elf_file_t ef)
387 {
388 Elf_Dyn *dp;
389 int plttype = DT_REL;
390
391 for (dp = ef->dynamic; dp->d_tag != DT_NULL; dp++) {
392 switch (dp->d_tag) {
393 case DT_HASH:
394 {
395 /* From src/libexec/rtld-elf/rtld.c */
396 const Elf_Hashelt *hashtab = (const Elf_Hashelt *)
397 (ef->address + dp->d_un.d_ptr);
398 ef->nbuckets = hashtab[0];
399 ef->nchains = hashtab[1];
400 ef->buckets = hashtab + 2;
401 ef->chains = ef->buckets + ef->nbuckets;
402 break;
403 }
404 case DT_STRTAB:
405 ef->strtab = (caddr_t) (ef->address + dp->d_un.d_ptr);
406 break;
407 case DT_STRSZ:
408 ef->strsz = dp->d_un.d_val;
409 break;
410 case DT_SYMTAB:
411 ef->symtab = (Elf_Sym*) (ef->address + dp->d_un.d_ptr);
412 break;
413 case DT_SYMENT:
414 if (dp->d_un.d_val != sizeof(Elf_Sym))
415 return ENOEXEC;
416 break;
417 case DT_PLTGOT:
418 ef->got = (Elf_Addr *) (ef->address + dp->d_un.d_ptr);
419 break;
420 case DT_REL:
421 ef->rel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr);
422 break;
423 case DT_RELSZ:
424 ef->relsize = dp->d_un.d_val;
425 break;
426 case DT_RELENT:
427 if (dp->d_un.d_val != sizeof(Elf_Rel))
428 return ENOEXEC;
429 break;
430 case DT_JMPREL:
431 ef->pltrel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr);
432 break;
433 case DT_PLTRELSZ:
434 ef->pltrelsize = dp->d_un.d_val;
435 break;
436 case DT_RELA:
437 ef->rela = (const Elf_Rela *) (ef->address + dp->d_un.d_ptr);
438 break;
439 case DT_RELASZ:
440 ef->relasize = dp->d_un.d_val;
441 break;
442 case DT_RELAENT:
443 if (dp->d_un.d_val != sizeof(Elf_Rela))
444 return ENOEXEC;
445 break;
446 case DT_PLTREL:
447 plttype = dp->d_un.d_val;
448 if (plttype != DT_REL && plttype != DT_RELA)
449 return ENOEXEC;
450 break;
451 #ifdef GDB
452 case DT_DEBUG:
453 dp->d_un.d_ptr = (Elf_Addr) &r_debug;
454 break;
455 #endif
456 }
457 }
458
459 if (plttype == DT_RELA) {
460 ef->pltrela = (const Elf_Rela *) ef->pltrel;
461 ef->pltrel = NULL;
462 ef->pltrelasize = ef->pltrelsize;
463 ef->pltrelsize = 0;
464 }
465
466 ef->ddbsymtab = ef->symtab;
467 ef->ddbsymcnt = ef->nchains;
468 ef->ddbstrtab = ef->strtab;
469 ef->ddbstrcnt = ef->strsz;
470
471 return 0;
472 }
473
474 static int
475 link_elf_link_preload(linker_class_t cls,
476 const char* filename, linker_file_t *result)
477 {
478 caddr_t modptr, baseptr, sizeptr, dynptr;
479 char *type;
480 elf_file_t ef;
481 linker_file_t lf;
482 int error;
483 vm_offset_t dp;
484
485 /* Look to see if we have the file preloaded */
486 modptr = preload_search_by_name(filename);
487 if (modptr == NULL)
488 return ENOENT;
489
490 type = (char *)preload_search_info(modptr, MODINFO_TYPE);
491 baseptr = preload_search_info(modptr, MODINFO_ADDR);
492 sizeptr = preload_search_info(modptr, MODINFO_SIZE);
493 dynptr = preload_search_info(modptr, MODINFO_METADATA|MODINFOMD_DYNAMIC);
494 if (type == NULL ||
495 (strcmp(type, "elf" __XSTRING(__ELF_WORD_SIZE) " module") != 0 &&
496 strcmp(type, "elf module") != 0))
497 return (EFTYPE);
498 if (baseptr == NULL || sizeptr == NULL || dynptr == NULL)
499 return (EINVAL);
500
501 lf = linker_make_file(filename, &link_elf_class);
502 if (lf == NULL) {
503 return ENOMEM;
504 }
505
506 ef = (elf_file_t) lf;
507 ef->preloaded = 1;
508 ef->modptr = modptr;
509 ef->address = *(caddr_t *)baseptr;
510 #ifdef SPARSE_MAPPING
511 ef->object = 0;
512 #endif
513 dp = (vm_offset_t)ef->address + *(vm_offset_t *)dynptr;
514 ef->dynamic = (Elf_Dyn *)dp;
515 lf->address = ef->address;
516 lf->size = *(size_t *)sizeptr;
517
518 error = parse_dynamic(ef);
519 if (error) {
520 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
521 return error;
522 }
523 link_elf_reloc_local(lf);
524 *result = lf;
525 return (0);
526 }
527
528 static int
529 link_elf_link_preload_finish(linker_file_t lf)
530 {
531 elf_file_t ef;
532 int error;
533
534 ef = (elf_file_t) lf;
535 #if 0 /* this will be more trouble than it's worth for now */
536 for (dp = ef->dynamic; dp->d_tag != DT_NULL; dp++) {
537 if (dp->d_tag != DT_NEEDED)
538 continue;
539 modname = ef->strtab + dp->d_un.d_val;
540 error = linker_load_module(modname, lf);
541 if (error)
542 goto out;
543 }
544 #endif
545 error = relocate_file(ef);
546 if (error)
547 return error;
548 (void)link_elf_preload_parse_symbols(ef);
549
550 return (link_elf_link_common_finish(lf));
551 }
552
553 static int
554 link_elf_load_file(linker_class_t cls, const char* filename,
555 linker_file_t* result)
556 {
557 struct nameidata nd;
558 struct thread* td = curthread; /* XXX */
559 Elf_Ehdr *hdr;
560 caddr_t firstpage;
561 int nbytes, i;
562 Elf_Phdr *phdr;
563 Elf_Phdr *phlimit;
564 Elf_Phdr *segs[MAXSEGS];
565 int nsegs;
566 Elf_Phdr *phdyn;
567 Elf_Phdr *phphdr;
568 caddr_t mapbase;
569 size_t mapsize;
570 Elf_Off base_offset;
571 Elf_Addr base_vaddr;
572 Elf_Addr base_vlimit;
573 int error = 0;
574 int resid, flags;
575 elf_file_t ef;
576 linker_file_t lf;
577 Elf_Shdr *shdr;
578 int symtabindex;
579 int symstrindex;
580 int symcnt;
581 int strcnt;
582 int vfslocked;
583
584 shdr = NULL;
585 lf = NULL;
586
587 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE, filename, td);
588 flags = FREAD;
589 error = vn_open(&nd, &flags, 0, NULL);
590 if (error)
591 return error;
592 vfslocked = NDHASGIANT(&nd);
593 NDFREE(&nd, NDF_ONLY_PNBUF);
594 if (nd.ni_vp->v_type != VREG) {
595 error = ENOEXEC;
596 firstpage = NULL;
597 goto out;
598 }
599 #ifdef MAC
600 error = mac_kld_check_load(curthread->td_ucred, nd.ni_vp);
601 if (error) {
602 firstpage = NULL;
603 goto out;
604 }
605 #endif
606
607 /*
608 * Read the elf header from the file.
609 */
610 firstpage = malloc(PAGE_SIZE, M_LINKER, M_WAITOK);
611 if (firstpage == NULL) {
612 error = ENOMEM;
613 goto out;
614 }
615 hdr = (Elf_Ehdr *)firstpage;
616 error = vn_rdwr(UIO_READ, nd.ni_vp, firstpage, PAGE_SIZE, 0,
617 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
618 &resid, td);
619 nbytes = PAGE_SIZE - resid;
620 if (error)
621 goto out;
622
623 if (!IS_ELF(*hdr)) {
624 error = ENOEXEC;
625 goto out;
626 }
627
628 if (hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS
629 || hdr->e_ident[EI_DATA] != ELF_TARG_DATA) {
630 link_elf_error(filename, "Unsupported file layout");
631 error = ENOEXEC;
632 goto out;
633 }
634 if (hdr->e_ident[EI_VERSION] != EV_CURRENT
635 || hdr->e_version != EV_CURRENT) {
636 link_elf_error(filename, "Unsupported file version");
637 error = ENOEXEC;
638 goto out;
639 }
640 if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) {
641 link_elf_error(filename, "Unsupported file type");
642 error = ENOEXEC;
643 goto out;
644 }
645 if (hdr->e_machine != ELF_TARG_MACH) {
646 link_elf_error(filename, "Unsupported machine");
647 error = ENOEXEC;
648 goto out;
649 }
650
651 /*
652 * We rely on the program header being in the first page. This is
653 * not strictly required by the ABI specification, but it seems to
654 * always true in practice. And, it simplifies things considerably.
655 */
656 if (!((hdr->e_phentsize == sizeof(Elf_Phdr)) &&
657 (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= PAGE_SIZE) &&
658 (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= nbytes)))
659 link_elf_error(filename, "Unreadable program headers");
660
661 /*
662 * Scan the program header entries, and save key information.
663 *
664 * We rely on there being exactly two load segments, text and data,
665 * in that order.
666 */
667 phdr = (Elf_Phdr *) (firstpage + hdr->e_phoff);
668 phlimit = phdr + hdr->e_phnum;
669 nsegs = 0;
670 phdyn = NULL;
671 phphdr = NULL;
672 while (phdr < phlimit) {
673 switch (phdr->p_type) {
674
675 case PT_LOAD:
676 if (nsegs == MAXSEGS) {
677 link_elf_error(filename, "Too many sections");
678 error = ENOEXEC;
679 goto out;
680 }
681 /*
682 * XXX: We just trust they come in right order ??
683 */
684 segs[nsegs] = phdr;
685 ++nsegs;
686 break;
687
688 case PT_PHDR:
689 phphdr = phdr;
690 break;
691
692 case PT_DYNAMIC:
693 phdyn = phdr;
694 break;
695
696 case PT_INTERP:
697 link_elf_error(filename, "Unsupported file type");
698 error = ENOEXEC;
699 goto out;
700 }
701
702 ++phdr;
703 }
704 if (phdyn == NULL) {
705 link_elf_error(filename, "Object is not dynamically-linked");
706 error = ENOEXEC;
707 goto out;
708 }
709 if (nsegs == 0) {
710 link_elf_error(filename, "No sections");
711 error = ENOEXEC;
712 goto out;
713 }
714
715 /*
716 * Allocate the entire address space of the object, to stake out our
717 * contiguous region, and to establish the base address for relocation.
718 */
719 base_offset = trunc_page(segs[0]->p_offset);
720 base_vaddr = trunc_page(segs[0]->p_vaddr);
721 base_vlimit = round_page(segs[nsegs - 1]->p_vaddr +
722 segs[nsegs - 1]->p_memsz);
723 mapsize = base_vlimit - base_vaddr;
724
725 lf = linker_make_file(filename, &link_elf_class);
726 if (!lf) {
727 error = ENOMEM;
728 goto out;
729 }
730
731 ef = (elf_file_t) lf;
732 #ifdef SPARSE_MAPPING
733 ef->object = vm_object_allocate(OBJT_DEFAULT, mapsize >> PAGE_SHIFT);
734 if (ef->object == NULL) {
735 error = ENOMEM;
736 goto out;
737 }
738 ef->address = (caddr_t) vm_map_min(kernel_map);
739 error = vm_map_find(kernel_map, ef->object, 0,
740 (vm_offset_t *) &ef->address,
741 mapsize, 1,
742 VM_PROT_ALL, VM_PROT_ALL, 0);
743 if (error) {
744 vm_object_deallocate(ef->object);
745 ef->object = 0;
746 goto out;
747 }
748 #else
749 ef->address = malloc(mapsize, M_LINKER, M_WAITOK);
750 if (!ef->address) {
751 error = ENOMEM;
752 goto out;
753 }
754 #endif
755 mapbase = ef->address;
756
757 /*
758 * Read the text and data sections and zero the bss.
759 */
760 for (i = 0; i < nsegs; i++) {
761 caddr_t segbase = mapbase + segs[i]->p_vaddr - base_vaddr;
762 error = vn_rdwr(UIO_READ, nd.ni_vp,
763 segbase, segs[i]->p_filesz, segs[i]->p_offset,
764 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
765 &resid, td);
766 if (error) {
767 goto out;
768 }
769 bzero(segbase + segs[i]->p_filesz,
770 segs[i]->p_memsz - segs[i]->p_filesz);
771
772 #ifdef SPARSE_MAPPING
773 /*
774 * Wire down the pages
775 */
776 error = vm_map_wire(kernel_map,
777 (vm_offset_t) segbase,
778 (vm_offset_t) segbase + segs[i]->p_memsz,
779 VM_MAP_WIRE_SYSTEM|VM_MAP_WIRE_NOHOLES);
780 if (error != KERN_SUCCESS) {
781 error = ENOMEM;
782 goto out;
783 }
784 #endif
785 }
786
787 #ifdef GPROF
788 /* Update profiling information with the new text segment. */
789 mtx_lock(&Giant);
790 kmupetext((uintfptr_t)(mapbase + segs[0]->p_vaddr - base_vaddr +
791 segs[0]->p_memsz));
792 mtx_unlock(&Giant);
793 #endif
794
795 ef->dynamic = (Elf_Dyn *) (mapbase + phdyn->p_vaddr - base_vaddr);
796
797 lf->address = ef->address;
798 lf->size = mapsize;
799
800 error = parse_dynamic(ef);
801 if (error)
802 goto out;
803 link_elf_reloc_local(lf);
804
805 VOP_UNLOCK(nd.ni_vp, 0);
806 error = linker_load_dependencies(lf);
807 vn_lock(nd.ni_vp, LK_EXCLUSIVE | LK_RETRY);
808 if (error)
809 goto out;
810 #if 0 /* this will be more trouble than it's worth for now */
811 for (dp = ef->dynamic; dp->d_tag != DT_NULL; dp++) {
812 if (dp->d_tag != DT_NEEDED)
813 continue;
814 modname = ef->strtab + dp->d_un.d_val;
815 error = linker_load_module(modname, lf);
816 if (error)
817 goto out;
818 }
819 #endif
820 error = relocate_file(ef);
821 if (error)
822 goto out;
823
824 /* Try and load the symbol table if it's present. (you can strip it!) */
825 nbytes = hdr->e_shnum * hdr->e_shentsize;
826 if (nbytes == 0 || hdr->e_shoff == 0)
827 goto nosyms;
828 shdr = malloc(nbytes, M_LINKER, M_WAITOK | M_ZERO);
829 if (shdr == NULL) {
830 error = ENOMEM;
831 goto out;
832 }
833 error = vn_rdwr(UIO_READ, nd.ni_vp,
834 (caddr_t)shdr, nbytes, hdr->e_shoff,
835 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
836 &resid, td);
837 if (error)
838 goto out;
839 symtabindex = -1;
840 symstrindex = -1;
841 for (i = 0; i < hdr->e_shnum; i++) {
842 if (shdr[i].sh_type == SHT_SYMTAB) {
843 symtabindex = i;
844 symstrindex = shdr[i].sh_link;
845 }
846 }
847 if (symtabindex < 0 || symstrindex < 0)
848 goto nosyms;
849
850 symcnt = shdr[symtabindex].sh_size;
851 ef->symbase = malloc(symcnt, M_LINKER, M_WAITOK);
852 strcnt = shdr[symstrindex].sh_size;
853 ef->strbase = malloc(strcnt, M_LINKER, M_WAITOK);
854
855 if (ef->symbase == NULL || ef->strbase == NULL) {
856 error = ENOMEM;
857 goto out;
858 }
859 error = vn_rdwr(UIO_READ, nd.ni_vp,
860 ef->symbase, symcnt, shdr[symtabindex].sh_offset,
861 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
862 &resid, td);
863 if (error)
864 goto out;
865 error = vn_rdwr(UIO_READ, nd.ni_vp,
866 ef->strbase, strcnt, shdr[symstrindex].sh_offset,
867 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED,
868 &resid, td);
869 if (error)
870 goto out;
871
872 ef->ddbsymcnt = symcnt / sizeof(Elf_Sym);
873 ef->ddbsymtab = (const Elf_Sym *)ef->symbase;
874 ef->ddbstrcnt = strcnt;
875 ef->ddbstrtab = ef->strbase;
876
877 error = link_elf_link_common_finish(lf);
878 if (error)
879 goto out;
880
881 nosyms:
882
883 *result = lf;
884
885 out:
886 if (error && lf)
887 linker_file_unload(lf, LINKER_UNLOAD_FORCE);
888 if (shdr)
889 free(shdr, M_LINKER);
890 if (firstpage)
891 free(firstpage, M_LINKER);
892 VOP_UNLOCK(nd.ni_vp, 0);
893 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
894 VFS_UNLOCK_GIANT(vfslocked);
895
896 return error;
897 }
898
899 static void
900 link_elf_unload_file(linker_file_t file)
901 {
902 elf_file_t ef = (elf_file_t) file;
903
904 #ifdef GDB
905 if (ef->gdb.l_ld) {
906 GDB_STATE(RT_DELETE);
907 free((void *)(uintptr_t)ef->gdb.l_name, M_LINKER);
908 link_elf_delete_gdb(&ef->gdb);
909 GDB_STATE(RT_CONSISTENT);
910 }
911 #endif
912
913 /* Notify MD code that a module is being unloaded. */
914 elf_cpu_unload_file(file);
915
916 if (ef->preloaded) {
917 link_elf_unload_preload(file);
918 return;
919 }
920
921 #ifdef SPARSE_MAPPING
922 if (ef->object) {
923 vm_map_remove(kernel_map, (vm_offset_t) ef->address,
924 (vm_offset_t) ef->address
925 + (ef->object->size << PAGE_SHIFT));
926 }
927 #else
928 if (ef->address)
929 free(ef->address, M_LINKER);
930 #endif
931 if (ef->symbase)
932 free(ef->symbase, M_LINKER);
933 if (ef->strbase)
934 free(ef->strbase, M_LINKER);
935 if (ef->ctftab)
936 free(ef->ctftab, M_LINKER);
937 if (ef->ctfoff)
938 free(ef->ctfoff, M_LINKER);
939 if (ef->typoff)
940 free(ef->typoff, M_LINKER);
941 }
942
943 static void
944 link_elf_unload_preload(linker_file_t file)
945 {
946 if (file->filename)
947 preload_delete_name(file->filename);
948 }
949
950 static const char *
951 symbol_name(elf_file_t ef, Elf_Size r_info)
952 {
953 const Elf_Sym *ref;
954
955 if (ELF_R_SYM(r_info)) {
956 ref = ef->symtab + ELF_R_SYM(r_info);
957 return ef->strtab + ref->st_name;
958 } else
959 return NULL;
960 }
961
962 static int
963 relocate_file(elf_file_t ef)
964 {
965 const Elf_Rel *rellim;
966 const Elf_Rel *rel;
967 const Elf_Rela *relalim;
968 const Elf_Rela *rela;
969 const char *symname;
970
971 /* Perform relocations without addend if there are any: */
972 rel = ef->rel;
973 if (rel) {
974 rellim = (const Elf_Rel *)((const char *)ef->rel + ef->relsize);
975 while (rel < rellim) {
976 if (elf_reloc(&ef->lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL,
977 elf_lookup)) {
978 symname = symbol_name(ef, rel->r_info);
979 printf("link_elf: symbol %s undefined\n", symname);
980 return ENOENT;
981 }
982 rel++;
983 }
984 }
985
986 /* Perform relocations with addend if there are any: */
987 rela = ef->rela;
988 if (rela) {
989 relalim = (const Elf_Rela *)((const char *)ef->rela + ef->relasize);
990 while (rela < relalim) {
991 if (elf_reloc(&ef->lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA,
992 elf_lookup)) {
993 symname = symbol_name(ef, rela->r_info);
994 printf("link_elf: symbol %s undefined\n", symname);
995 return ENOENT;
996 }
997 rela++;
998 }
999 }
1000
1001 /* Perform PLT relocations without addend if there are any: */
1002 rel = ef->pltrel;
1003 if (rel) {
1004 rellim = (const Elf_Rel *)((const char *)ef->pltrel + ef->pltrelsize);
1005 while (rel < rellim) {
1006 if (elf_reloc(&ef->lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL,
1007 elf_lookup)) {
1008 symname = symbol_name(ef, rel->r_info);
1009 printf("link_elf: symbol %s undefined\n", symname);
1010 return ENOENT;
1011 }
1012 rel++;
1013 }
1014 }
1015
1016 /* Perform relocations with addend if there are any: */
1017 rela = ef->pltrela;
1018 if (rela) {
1019 relalim = (const Elf_Rela *)((const char *)ef->pltrela + ef->pltrelasize);
1020 while (rela < relalim) {
1021 if (elf_reloc(&ef->lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA,
1022 elf_lookup)) {
1023 symname = symbol_name(ef, rela->r_info);
1024 printf("link_elf: symbol %s undefined\n", symname);
1025 return ENOENT;
1026 }
1027 rela++;
1028 }
1029 }
1030
1031 return 0;
1032 }
1033
1034 /*
1035 * Hash function for symbol table lookup. Don't even think about changing
1036 * this. It is specified by the System V ABI.
1037 */
1038 static unsigned long
1039 elf_hash(const char *name)
1040 {
1041 const unsigned char *p = (const unsigned char *) name;
1042 unsigned long h = 0;
1043 unsigned long g;
1044
1045 while (*p != '\0') {
1046 h = (h << 4) + *p++;
1047 if ((g = h & 0xf0000000) != 0)
1048 h ^= g >> 24;
1049 h &= ~g;
1050 }
1051 return h;
1052 }
1053
1054 static int
1055 link_elf_lookup_symbol(linker_file_t lf, const char* name, c_linker_sym_t* sym)
1056 {
1057 elf_file_t ef = (elf_file_t) lf;
1058 unsigned long symnum;
1059 const Elf_Sym* symp;
1060 const char *strp;
1061 unsigned long hash;
1062 int i;
1063
1064 /* If we don't have a hash, bail. */
1065 if (ef->buckets == NULL || ef->nbuckets == 0) {
1066 printf("link_elf_lookup_symbol: missing symbol hash table\n");
1067 return ENOENT;
1068 }
1069
1070 /* First, search hashed global symbols */
1071 hash = elf_hash(name);
1072 symnum = ef->buckets[hash % ef->nbuckets];
1073
1074 while (symnum != STN_UNDEF) {
1075 if (symnum >= ef->nchains) {
1076 printf("link_elf_lookup_symbol: corrupt symbol table\n");
1077 return ENOENT;
1078 }
1079
1080 symp = ef->symtab + symnum;
1081 if (symp->st_name == 0) {
1082 printf("link_elf_lookup_symbol: corrupt symbol table\n");
1083 return ENOENT;
1084 }
1085
1086 strp = ef->strtab + symp->st_name;
1087
1088 if (strcmp(name, strp) == 0) {
1089 if (symp->st_shndx != SHN_UNDEF ||
1090 (symp->st_value != 0 &&
1091 ELF_ST_TYPE(symp->st_info) == STT_FUNC)) {
1092 *sym = (c_linker_sym_t) symp;
1093 return 0;
1094 } else
1095 return ENOENT;
1096 }
1097
1098 symnum = ef->chains[symnum];
1099 }
1100
1101 /* If we have not found it, look at the full table (if loaded) */
1102 if (ef->symtab == ef->ddbsymtab)
1103 return ENOENT;
1104
1105 /* Exhaustive search */
1106 for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
1107 strp = ef->ddbstrtab + symp->st_name;
1108 if (strcmp(name, strp) == 0) {
1109 if (symp->st_shndx != SHN_UNDEF ||
1110 (symp->st_value != 0 &&
1111 ELF_ST_TYPE(symp->st_info) == STT_FUNC)) {
1112 *sym = (c_linker_sym_t) symp;
1113 return 0;
1114 } else
1115 return ENOENT;
1116 }
1117 }
1118
1119 return ENOENT;
1120 }
1121
1122 static int
1123 link_elf_symbol_values(linker_file_t lf, c_linker_sym_t sym, linker_symval_t* symval)
1124 {
1125 elf_file_t ef = (elf_file_t) lf;
1126 const Elf_Sym* es = (const Elf_Sym*) sym;
1127
1128 if (es >= ef->symtab && es < (ef->symtab + ef->nchains)) {
1129 symval->name = ef->strtab + es->st_name;
1130 symval->value = (caddr_t) ef->address + es->st_value;
1131 symval->size = es->st_size;
1132 return 0;
1133 }
1134 if (ef->symtab == ef->ddbsymtab)
1135 return ENOENT;
1136 if (es >= ef->ddbsymtab && es < (ef->ddbsymtab + ef->ddbsymcnt)) {
1137 symval->name = ef->ddbstrtab + es->st_name;
1138 symval->value = (caddr_t) ef->address + es->st_value;
1139 symval->size = es->st_size;
1140 return 0;
1141 }
1142 return ENOENT;
1143 }
1144
1145 static int
1146 link_elf_search_symbol(linker_file_t lf, caddr_t value,
1147 c_linker_sym_t* sym, long* diffp)
1148 {
1149 elf_file_t ef = (elf_file_t) lf;
1150 u_long off = (uintptr_t) (void *) value;
1151 u_long diff = off;
1152 u_long st_value;
1153 const Elf_Sym* es;
1154 const Elf_Sym* best = 0;
1155 int i;
1156
1157 for (i = 0, es = ef->ddbsymtab; i < ef->ddbsymcnt; i++, es++) {
1158 if (es->st_name == 0)
1159 continue;
1160 st_value = es->st_value + (uintptr_t) (void *) ef->address;
1161 if (off >= st_value) {
1162 if (off - st_value < diff) {
1163 diff = off - st_value;
1164 best = es;
1165 if (diff == 0)
1166 break;
1167 } else if (off - st_value == diff) {
1168 best = es;
1169 }
1170 }
1171 }
1172 if (best == 0)
1173 *diffp = off;
1174 else
1175 *diffp = diff;
1176 *sym = (c_linker_sym_t) best;
1177
1178 return 0;
1179 }
1180
1181 /*
1182 * Look up a linker set on an ELF system.
1183 */
1184 static int
1185 link_elf_lookup_set(linker_file_t lf, const char *name,
1186 void ***startp, void ***stopp, int *countp)
1187 {
1188 c_linker_sym_t sym;
1189 linker_symval_t symval;
1190 char *setsym;
1191 void **start, **stop;
1192 int len, error = 0, count;
1193
1194 len = strlen(name) + sizeof("__start_set_"); /* sizeof includes \0 */
1195 setsym = malloc(len, M_LINKER, M_WAITOK);
1196 if (setsym == NULL)
1197 return ENOMEM;
1198
1199 /* get address of first entry */
1200 snprintf(setsym, len, "%s%s", "__start_set_", name);
1201 error = link_elf_lookup_symbol(lf, setsym, &sym);
1202 if (error)
1203 goto out;
1204 link_elf_symbol_values(lf, sym, &symval);
1205 if (symval.value == 0) {
1206 error = ESRCH;
1207 goto out;
1208 }
1209 start = (void **)symval.value;
1210
1211 /* get address of last entry */
1212 snprintf(setsym, len, "%s%s", "__stop_set_", name);
1213 error = link_elf_lookup_symbol(lf, setsym, &sym);
1214 if (error)
1215 goto out;
1216 link_elf_symbol_values(lf, sym, &symval);
1217 if (symval.value == 0) {
1218 error = ESRCH;
1219 goto out;
1220 }
1221 stop = (void **)symval.value;
1222
1223 /* and the number of entries */
1224 count = stop - start;
1225
1226 /* and copy out */
1227 if (startp)
1228 *startp = start;
1229 if (stopp)
1230 *stopp = stop;
1231 if (countp)
1232 *countp = count;
1233
1234 out:
1235 free(setsym, M_LINKER);
1236 return error;
1237 }
1238
1239 static int
1240 link_elf_each_function_name(linker_file_t file,
1241 int (*callback)(const char *, void *), void *opaque) {
1242 elf_file_t ef = (elf_file_t)file;
1243 const Elf_Sym* symp;
1244 int i, error;
1245
1246 /* Exhaustive search */
1247 for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
1248 if (symp->st_value != 0 &&
1249 ELF_ST_TYPE(symp->st_info) == STT_FUNC) {
1250 error = callback(ef->ddbstrtab + symp->st_name, opaque);
1251 if (error)
1252 return (error);
1253 }
1254 }
1255 return (0);
1256 }
1257
1258 static int
1259 link_elf_each_function_nameval(linker_file_t file,
1260 linker_function_nameval_callback_t callback, void *opaque)
1261 {
1262 linker_symval_t symval;
1263 elf_file_t ef = (elf_file_t)file;
1264 const Elf_Sym* symp;
1265 int i, error;
1266
1267 /* Exhaustive search */
1268 for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) {
1269 if (symp->st_value != 0 &&
1270 ELF_ST_TYPE(symp->st_info) == STT_FUNC) {
1271 error = link_elf_symbol_values(file, (c_linker_sym_t) symp, &symval);
1272 if (error)
1273 return (error);
1274 error = callback(file, i, &symval, opaque);
1275 if (error)
1276 return (error);
1277 }
1278 }
1279 return (0);
1280 }
1281
1282 #ifdef __ia64__
1283 /*
1284 * Each KLD has its own GP. The GP value for each load module is given by
1285 * DT_PLTGOT on ia64. We need GP to construct function descriptors, but
1286 * don't have direct access to the ELF file structure. The link_elf_get_gp()
1287 * function returns the GP given a pointer to a generic linker file struct.
1288 */
1289 Elf_Addr
1290 link_elf_get_gp(linker_file_t lf)
1291 {
1292 elf_file_t ef = (elf_file_t)lf;
1293 return (Elf_Addr)ef->got;
1294 }
1295 #endif
1296
1297 const Elf_Sym *
1298 elf_get_sym(linker_file_t lf, Elf_Size symidx)
1299 {
1300 elf_file_t ef = (elf_file_t)lf;
1301
1302 if (symidx >= ef->nchains)
1303 return (NULL);
1304 return (ef->symtab + symidx);
1305 }
1306
1307 const char *
1308 elf_get_symname(linker_file_t lf, Elf_Size symidx)
1309 {
1310 elf_file_t ef = (elf_file_t)lf;
1311 const Elf_Sym *sym;
1312
1313 if (symidx >= ef->nchains)
1314 return (NULL);
1315 sym = ef->symtab + symidx;
1316 return (ef->strtab + sym->st_name);
1317 }
1318
1319 /*
1320 * Symbol lookup function that can be used when the symbol index is known (ie
1321 * in relocations). It uses the symbol index instead of doing a fully fledged
1322 * hash table based lookup when such is valid. For example for local symbols.
1323 * This is not only more efficient, it's also more correct. It's not always
1324 * the case that the symbol can be found through the hash table.
1325 */
1326 static Elf_Addr
1327 elf_lookup(linker_file_t lf, Elf_Size symidx, int deps)
1328 {
1329 elf_file_t ef = (elf_file_t)lf;
1330 const Elf_Sym *sym;
1331 const char *symbol;
1332
1333 /* Don't even try to lookup the symbol if the index is bogus. */
1334 if (symidx >= ef->nchains)
1335 return (0);
1336
1337 sym = ef->symtab + symidx;
1338
1339 /*
1340 * Don't do a full lookup when the symbol is local. It may even
1341 * fail because it may not be found through the hash table.
1342 */
1343 if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) {
1344 /* Force lookup failure when we have an insanity. */
1345 if (sym->st_shndx == SHN_UNDEF || sym->st_value == 0)
1346 return (0);
1347 return ((Elf_Addr)ef->address + sym->st_value);
1348 }
1349
1350 /*
1351 * XXX we can avoid doing a hash table based lookup for global
1352 * symbols as well. This however is not always valid, so we'll
1353 * just do it the hard way for now. Performance tweaks can
1354 * always be added.
1355 */
1356
1357 symbol = ef->strtab + sym->st_name;
1358
1359 /* Force a lookup failure if the symbol name is bogus. */
1360 if (*symbol == 0)
1361 return (0);
1362
1363 return ((Elf_Addr)linker_file_lookup_symbol(lf, symbol, deps));
1364 }
1365
1366 static void
1367 link_elf_reloc_local(linker_file_t lf)
1368 {
1369 const Elf_Rel *rellim;
1370 const Elf_Rel *rel;
1371 const Elf_Rela *relalim;
1372 const Elf_Rela *rela;
1373 elf_file_t ef = (elf_file_t)lf;
1374
1375 /* Perform relocations without addend if there are any: */
1376 if ((rel = ef->rel) != NULL) {
1377 rellim = (const Elf_Rel *)((const char *)ef->rel + ef->relsize);
1378 while (rel < rellim) {
1379 elf_reloc_local(lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL,
1380 elf_lookup);
1381 rel++;
1382 }
1383 }
1384
1385 /* Perform relocations with addend if there are any: */
1386 if ((rela = ef->rela) != NULL) {
1387 relalim = (const Elf_Rela *)((const char *)ef->rela + ef->relasize);
1388 while (rela < relalim) {
1389 elf_reloc_local(lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA,
1390 elf_lookup);
1391 rela++;
1392 }
1393 }
1394 }
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