Commit | Line | Data |
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984263bc MD |
1 | /*- |
2 | * Copyright (c) 1998 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 | * $FreeBSD: src/sys/kern/link_elf.c,v 1.24 1999/12/24 15:33:36 bde Exp $ | |
27 | */ | |
28 | ||
29 | #include <sys/param.h> | |
30 | #include <sys/kernel.h> | |
31 | #include <sys/systm.h> | |
32 | #include <sys/malloc.h> | |
33 | #include <sys/proc.h> | |
fad57d0e | 34 | #include <sys/nlookup.h> |
984263bc MD |
35 | #include <sys/fcntl.h> |
36 | #include <sys/vnode.h> | |
37 | #include <sys/linker.h> | |
38 | #include <machine/elf.h> | |
39 | ||
40 | #include <vm/vm.h> | |
41 | #include <vm/vm_param.h> | |
42 | #include <vm/vm_zone.h> | |
43 | #include <sys/lock.h> | |
984263bc MD |
44 | #include <vm/pmap.h> |
45 | #include <vm/vm_map.h> | |
46 | ||
dbefba87 | 47 | #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) |
dbdd9b9a JG |
48 | #include <stdio.h> |
49 | #endif | |
50 | ||
1c0e3286 SS |
51 | static int link_elf_preload_file(const char *, linker_file_t *); |
52 | static int link_elf_preload_finish(linker_file_t); | |
53 | static int link_elf_load_file(const char*, linker_file_t*); | |
984263bc MD |
54 | static int link_elf_lookup_symbol(linker_file_t, const char*, |
55 | c_linker_sym_t*); | |
56 | static int link_elf_symbol_values(linker_file_t, c_linker_sym_t, linker_symval_t*); | |
57 | static int link_elf_search_symbol(linker_file_t, caddr_t value, | |
58 | c_linker_sym_t* sym, long* diffp); | |
59 | ||
60 | static void link_elf_unload_file(linker_file_t); | |
61 | static void link_elf_unload_module(linker_file_t); | |
dc62b251 MD |
62 | static int link_elf_lookup_set(linker_file_t, const char *, |
63 | void ***, void ***, int *); | |
1c0e3286 SS |
64 | static int elf_lookup(linker_file_t lf, Elf_Size symidx, int deps, Elf_Addr *); |
65 | static void link_elf_reloc_local(linker_file_t lf); | |
dc62b251 | 66 | |
984263bc | 67 | static struct linker_class_ops link_elf_class_ops = { |
1c0e3286 SS |
68 | link_elf_load_file, |
69 | link_elf_preload_file, | |
984263bc MD |
70 | }; |
71 | ||
72 | static struct linker_file_ops link_elf_file_ops = { | |
1c0e3286 SS |
73 | .lookup_symbol = link_elf_lookup_symbol, |
74 | .symbol_values = link_elf_symbol_values, | |
75 | .search_symbol = link_elf_search_symbol, | |
76 | .unload = link_elf_unload_file, | |
77 | .lookup_set = link_elf_lookup_set | |
984263bc MD |
78 | }; |
79 | ||
80 | static struct linker_file_ops link_elf_module_ops = { | |
1c0e3286 SS |
81 | .lookup_symbol = link_elf_lookup_symbol, |
82 | .symbol_values = link_elf_symbol_values, | |
83 | .search_symbol = link_elf_search_symbol, | |
84 | .preload_finish = link_elf_preload_finish, | |
85 | .unload = link_elf_unload_module, | |
86 | .lookup_set = link_elf_lookup_set, | |
984263bc | 87 | }; |
761c7789 | 88 | |
984263bc MD |
89 | typedef struct elf_file { |
90 | caddr_t address; /* Relocation address */ | |
984263bc | 91 | const Elf_Dyn* dynamic; /* Symbol table etc. */ |
d5fc85d0 MD |
92 | Elf_Hashelt nbuckets; /* DT_HASH info */ |
93 | Elf_Hashelt nchains; | |
94 | const Elf_Hashelt* buckets; | |
95 | const Elf_Hashelt* chains; | |
984263bc MD |
96 | caddr_t hash; |
97 | caddr_t strtab; /* DT_STRTAB */ | |
98 | int strsz; /* DT_STRSZ */ | |
99 | const Elf_Sym* symtab; /* DT_SYMTAB */ | |
100 | Elf_Addr* got; /* DT_PLTGOT */ | |
101 | const Elf_Rel* pltrel; /* DT_JMPREL */ | |
102 | int pltrelsize; /* DT_PLTRELSZ */ | |
103 | const Elf_Rela* pltrela; /* DT_JMPREL */ | |
104 | int pltrelasize; /* DT_PLTRELSZ */ | |
105 | const Elf_Rel* rel; /* DT_REL */ | |
106 | int relsize; /* DT_RELSZ */ | |
107 | const Elf_Rela* rela; /* DT_RELA */ | |
108 | int relasize; /* DT_RELASZ */ | |
109 | caddr_t modptr; | |
110 | const Elf_Sym* ddbsymtab; /* The symbol table we are using */ | |
111 | long ddbsymcnt; /* Number of symbols */ | |
112 | caddr_t ddbstrtab; /* String table */ | |
113 | long ddbstrcnt; /* number of bytes in string table */ | |
114 | caddr_t symbase; /* malloc'ed symbold base */ | |
115 | caddr_t strbase; /* malloc'ed string base */ | |
116 | } *elf_file_t; | |
117 | ||
118 | static int parse_dynamic(linker_file_t lf); | |
984263bc MD |
119 | static int relocate_file(linker_file_t lf); |
120 | static int parse_module_symbols(linker_file_t lf); | |
121 | ||
122 | /* | |
123 | * The kernel symbol table starts here. | |
124 | */ | |
125 | extern struct _dynamic _DYNAMIC; | |
126 | ||
127 | static void | |
128 | link_elf_init(void* arg) | |
129 | { | |
984263bc MD |
130 | Elf_Dyn *dp; |
131 | caddr_t modptr, baseptr, sizeptr; | |
132 | elf_file_t ef; | |
133 | char *modname; | |
984263bc MD |
134 | |
135 | #if ELF_TARG_CLASS == ELFCLASS32 | |
136 | linker_add_class("elf32", NULL, &link_elf_class_ops); | |
137 | #else | |
138 | linker_add_class("elf64", NULL, &link_elf_class_ops); | |
139 | #endif | |
140 | ||
984263bc MD |
141 | dp = (Elf_Dyn*) &_DYNAMIC; |
142 | if (dp) { | |
efda3bd0 | 143 | ef = kmalloc(sizeof(struct elf_file), M_LINKER, M_INTWAIT | M_ZERO); |
d8061892 | 144 | ef->address = NULL; |
984263bc MD |
145 | ef->dynamic = dp; |
146 | modname = NULL; | |
147 | modptr = preload_search_by_type("elf kernel"); | |
148 | if (modptr) | |
149 | modname = (char *)preload_search_info(modptr, MODINFO_NAME); | |
150 | if (modname == NULL) | |
151 | modname = "kernel"; | |
152 | linker_kernel_file = linker_make_file(modname, ef, &link_elf_file_ops); | |
153 | if (linker_kernel_file == NULL) | |
154 | panic("link_elf_init: Can't create linker structures for kernel"); | |
155 | parse_dynamic(linker_kernel_file); | |
dbefba87 | 156 | #if defined(__x86_64__) && defined(_KERNEL_VIRTUAL) |
dbdd9b9a JG |
157 | fprintf(stderr, "WARNING: KERNBASE being used\n"); |
158 | #endif | |
984263bc MD |
159 | linker_kernel_file->address = (caddr_t) KERNBASE; |
160 | linker_kernel_file->size = -(intptr_t)linker_kernel_file->address; | |
161 | ||
162 | if (modptr) { | |
163 | ef->modptr = modptr; | |
164 | baseptr = preload_search_info(modptr, MODINFO_ADDR); | |
165 | if (baseptr) | |
166 | linker_kernel_file->address = *(caddr_t *)baseptr; | |
167 | sizeptr = preload_search_info(modptr, MODINFO_SIZE); | |
168 | if (sizeptr) | |
169 | linker_kernel_file->size = *(size_t *)sizeptr; | |
170 | } | |
761c7789 | 171 | parse_module_symbols(linker_kernel_file); |
984263bc MD |
172 | linker_current_file = linker_kernel_file; |
173 | linker_kernel_file->flags |= LINKER_FILE_LINKED; | |
174 | } | |
984263bc MD |
175 | } |
176 | ||
ba39e2e0 | 177 | SYSINIT(link_elf, SI_BOOT2_KLD, SI_ORDER_SECOND, link_elf_init, 0); |
984263bc MD |
178 | |
179 | static int | |
180 | parse_module_symbols(linker_file_t lf) | |
181 | { | |
182 | elf_file_t ef = lf->priv; | |
183 | caddr_t pointer; | |
184 | caddr_t ssym, esym, base; | |
185 | caddr_t strtab; | |
186 | int strcnt; | |
187 | Elf_Sym* symtab; | |
188 | int symcnt; | |
189 | ||
190 | if (ef->modptr == NULL) | |
191 | return 0; | |
192 | pointer = preload_search_info(ef->modptr, MODINFO_METADATA|MODINFOMD_SSYM); | |
193 | if (pointer == NULL) | |
194 | return 0; | |
195 | ssym = *(caddr_t *)pointer; | |
196 | pointer = preload_search_info(ef->modptr, MODINFO_METADATA|MODINFOMD_ESYM); | |
197 | if (pointer == NULL) | |
198 | return 0; | |
199 | esym = *(caddr_t *)pointer; | |
200 | ||
201 | base = ssym; | |
202 | ||
203 | symcnt = *(long *)base; | |
204 | base += sizeof(long); | |
205 | symtab = (Elf_Sym *)base; | |
206 | base += roundup(symcnt, sizeof(long)); | |
207 | ||
208 | if (base > esym || base < ssym) { | |
6ea70f76 | 209 | kprintf("Symbols are corrupt!\n"); |
984263bc MD |
210 | return EINVAL; |
211 | } | |
212 | ||
213 | strcnt = *(long *)base; | |
214 | base += sizeof(long); | |
215 | strtab = base; | |
216 | base += roundup(strcnt, sizeof(long)); | |
217 | ||
218 | if (base > esym || base < ssym) { | |
6ea70f76 | 219 | kprintf("Symbols are corrupt!\n"); |
984263bc MD |
220 | return EINVAL; |
221 | } | |
222 | ||
223 | ef->ddbsymtab = symtab; | |
224 | ef->ddbsymcnt = symcnt / sizeof(Elf_Sym); | |
225 | ef->ddbstrtab = strtab; | |
226 | ef->ddbstrcnt = strcnt; | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static int | |
232 | parse_dynamic(linker_file_t lf) | |
233 | { | |
234 | elf_file_t ef = lf->priv; | |
235 | const Elf_Dyn *dp; | |
236 | int plttype = DT_REL; | |
237 | ||
238 | for (dp = ef->dynamic; dp->d_tag != DT_NULL; dp++) { | |
239 | switch (dp->d_tag) { | |
240 | case DT_HASH: | |
241 | { | |
242 | /* From src/libexec/rtld-elf/rtld.c */ | |
d5fc85d0 | 243 | const Elf_Hashelt *hashtab = (const Elf_Hashelt *) |
984263bc MD |
244 | (ef->address + dp->d_un.d_ptr); |
245 | ef->nbuckets = hashtab[0]; | |
246 | ef->nchains = hashtab[1]; | |
247 | ef->buckets = hashtab + 2; | |
248 | ef->chains = ef->buckets + ef->nbuckets; | |
249 | break; | |
250 | } | |
251 | case DT_STRTAB: | |
252 | ef->strtab = (caddr_t) (ef->address + dp->d_un.d_ptr); | |
253 | break; | |
254 | case DT_STRSZ: | |
255 | ef->strsz = dp->d_un.d_val; | |
256 | break; | |
257 | case DT_SYMTAB: | |
258 | ef->symtab = (Elf_Sym*) (ef->address + dp->d_un.d_ptr); | |
259 | break; | |
260 | case DT_SYMENT: | |
261 | if (dp->d_un.d_val != sizeof(Elf_Sym)) | |
262 | return ENOEXEC; | |
263 | break; | |
264 | case DT_PLTGOT: | |
265 | ef->got = (Elf_Addr *) (ef->address + dp->d_un.d_ptr); | |
266 | break; | |
267 | case DT_REL: | |
268 | ef->rel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr); | |
269 | break; | |
270 | case DT_RELSZ: | |
271 | ef->relsize = dp->d_un.d_val; | |
272 | break; | |
273 | case DT_RELENT: | |
274 | if (dp->d_un.d_val != sizeof(Elf_Rel)) | |
275 | return ENOEXEC; | |
276 | break; | |
277 | case DT_JMPREL: | |
278 | ef->pltrel = (const Elf_Rel *) (ef->address + dp->d_un.d_ptr); | |
279 | break; | |
280 | case DT_PLTRELSZ: | |
281 | ef->pltrelsize = dp->d_un.d_val; | |
282 | break; | |
283 | case DT_RELA: | |
284 | ef->rela = (const Elf_Rela *) (ef->address + dp->d_un.d_ptr); | |
285 | break; | |
286 | case DT_RELASZ: | |
287 | ef->relasize = dp->d_un.d_val; | |
288 | break; | |
289 | case DT_RELAENT: | |
290 | if (dp->d_un.d_val != sizeof(Elf_Rela)) | |
291 | return ENOEXEC; | |
292 | break; | |
293 | case DT_PLTREL: | |
294 | plttype = dp->d_un.d_val; | |
295 | if (plttype != DT_REL && plttype != DT_RELA) | |
296 | return ENOEXEC; | |
297 | break; | |
298 | } | |
299 | } | |
300 | ||
301 | if (plttype == DT_RELA) { | |
302 | ef->pltrela = (const Elf_Rela *) ef->pltrel; | |
303 | ef->pltrel = NULL; | |
304 | ef->pltrelasize = ef->pltrelsize; | |
305 | ef->pltrelsize = 0; | |
306 | } | |
307 | ||
308 | ef->ddbsymtab = ef->symtab; | |
309 | ef->ddbsymcnt = ef->nchains; | |
310 | ef->ddbstrtab = ef->strtab; | |
311 | ef->ddbstrcnt = ef->strsz; | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static void | |
317 | link_elf_error(const char *s) | |
318 | { | |
6ea70f76 | 319 | kprintf("kldload: %s\n", s); |
984263bc MD |
320 | } |
321 | ||
322 | static int | |
1c0e3286 | 323 | link_elf_preload_file(const char *filename, linker_file_t *result) |
984263bc MD |
324 | { |
325 | caddr_t modptr, baseptr, sizeptr, dynptr; | |
326 | char *type; | |
327 | elf_file_t ef; | |
328 | linker_file_t lf; | |
329 | int error; | |
330 | vm_offset_t dp; | |
331 | ||
32832096 MD |
332 | /* |
333 | * Look to see if we have the module preloaded. | |
334 | */ | |
984263bc MD |
335 | modptr = preload_search_by_name(filename); |
336 | if (modptr == NULL) | |
1c0e3286 | 337 | return ENOENT; |
984263bc MD |
338 | |
339 | /* It's preloaded, check we can handle it and collect information */ | |
340 | type = (char *)preload_search_info(modptr, MODINFO_TYPE); | |
341 | baseptr = preload_search_info(modptr, MODINFO_ADDR); | |
342 | sizeptr = preload_search_info(modptr, MODINFO_SIZE); | |
343 | dynptr = preload_search_info(modptr, MODINFO_METADATA|MODINFOMD_DYNAMIC); | |
1c0e3286 SS |
344 | if (type == NULL || |
345 | (strcmp(type, "elf" __XSTRING(__ELF_WORD_SIZE) " module") != 0 && | |
346 | strcmp(type, "elf module") != 0)) | |
984263bc MD |
347 | return (EFTYPE); |
348 | if (baseptr == NULL || sizeptr == NULL || dynptr == NULL) | |
349 | return (EINVAL); | |
350 | ||
efda3bd0 | 351 | ef = kmalloc(sizeof(struct elf_file), M_LINKER, M_WAITOK | M_ZERO); |
984263bc MD |
352 | ef->modptr = modptr; |
353 | ef->address = *(caddr_t *)baseptr; | |
984263bc MD |
354 | dp = (vm_offset_t)ef->address + *(vm_offset_t *)dynptr; |
355 | ef->dynamic = (Elf_Dyn *)dp; | |
356 | lf = linker_make_file(filename, ef, &link_elf_module_ops); | |
357 | if (lf == NULL) { | |
efda3bd0 | 358 | kfree(ef, M_LINKER); |
984263bc MD |
359 | return ENOMEM; |
360 | } | |
361 | lf->address = ef->address; | |
362 | lf->size = *(size_t *)sizeptr; | |
363 | ||
364 | error = parse_dynamic(lf); | |
365 | if (error) { | |
366 | linker_file_unload(lf); | |
367 | return error; | |
368 | } | |
1c0e3286 SS |
369 | link_elf_reloc_local(lf); |
370 | *result = lf; | |
371 | return (0); | |
372 | } | |
373 | ||
374 | static int | |
375 | link_elf_preload_finish(linker_file_t lf) | |
376 | { | |
377 | int error; | |
378 | ||
984263bc | 379 | error = relocate_file(lf); |
1c0e3286 | 380 | if (error) |
984263bc | 381 | return error; |
761c7789 | 382 | parse_module_symbols(lf); |
1c0e3286 | 383 | |
984263bc MD |
384 | return (0); |
385 | } | |
386 | ||
387 | static int | |
1c0e3286 | 388 | link_elf_load_file(const char* filename, linker_file_t* result) |
984263bc | 389 | { |
fad57d0e | 390 | struct nlookupdata nd; |
dadab5e9 MD |
391 | struct thread *td = curthread; /* XXX */ |
392 | struct proc *p = td->td_proc; | |
fad57d0e | 393 | struct vnode *vp; |
984263bc MD |
394 | Elf_Ehdr *hdr; |
395 | caddr_t firstpage; | |
396 | int nbytes, i; | |
397 | Elf_Phdr *phdr; | |
398 | Elf_Phdr *phlimit; | |
399 | Elf_Phdr *segs[2]; | |
400 | int nsegs; | |
401 | Elf_Phdr *phdyn; | |
984263bc MD |
402 | caddr_t mapbase; |
403 | size_t mapsize; | |
984263bc MD |
404 | Elf_Addr base_vaddr; |
405 | Elf_Addr base_vlimit; | |
406 | int error = 0; | |
407 | int resid; | |
408 | elf_file_t ef; | |
409 | linker_file_t lf; | |
410 | char *pathname; | |
411 | Elf_Shdr *shdr; | |
412 | int symtabindex; | |
413 | int symstrindex; | |
414 | int symcnt; | |
415 | int strcnt; | |
416 | ||
6d6c8d9d JT |
417 | /* XXX Hack for firmware loading where p == NULL */ |
418 | if (p == NULL) { | |
419 | p = &proc0; | |
420 | } | |
421 | ||
dadab5e9 | 422 | KKASSERT(p != NULL); |
a3d82f10 | 423 | if (p->p_ucred == NULL) { |
6ea70f76 | 424 | kprintf("link_elf_load_file: cannot load '%s' from filesystem" |
a3d82f10 MD |
425 | " this early\n", filename); |
426 | return ENOENT; | |
427 | } | |
984263bc MD |
428 | shdr = NULL; |
429 | lf = NULL; | |
984263bc MD |
430 | pathname = linker_search_path(filename); |
431 | if (pathname == NULL) | |
432 | return ENOENT; | |
433 | ||
fad57d0e MD |
434 | error = nlookup_init(&nd, pathname, UIO_SYSSPACE, NLC_FOLLOW|NLC_LOCKVP); |
435 | if (error == 0) | |
436 | error = vn_open(&nd, NULL, FREAD, 0); | |
efda3bd0 | 437 | kfree(pathname, M_LINKER); |
fad57d0e MD |
438 | if (error) { |
439 | nlookup_done(&nd); | |
984263bc | 440 | return error; |
fad57d0e MD |
441 | } |
442 | vp = nd.nl_open_vp; | |
443 | nd.nl_open_vp = NULL; | |
444 | nlookup_done(&nd); | |
984263bc MD |
445 | |
446 | /* | |
447 | * Read the elf header from the file. | |
448 | */ | |
efda3bd0 | 449 | firstpage = kmalloc(PAGE_SIZE, M_LINKER, M_WAITOK); |
984263bc | 450 | hdr = (Elf_Ehdr *)firstpage; |
fad57d0e | 451 | error = vn_rdwr(UIO_READ, vp, firstpage, PAGE_SIZE, 0, |
87de5057 | 452 | UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid); |
984263bc MD |
453 | nbytes = PAGE_SIZE - resid; |
454 | if (error) | |
455 | goto out; | |
456 | ||
457 | if (!IS_ELF(*hdr)) { | |
458 | error = ENOEXEC; | |
459 | goto out; | |
460 | } | |
461 | ||
462 | if (hdr->e_ident[EI_CLASS] != ELF_TARG_CLASS | |
463 | || hdr->e_ident[EI_DATA] != ELF_TARG_DATA) { | |
464 | link_elf_error("Unsupported file layout"); | |
465 | error = ENOEXEC; | |
466 | goto out; | |
467 | } | |
468 | if (hdr->e_ident[EI_VERSION] != EV_CURRENT | |
469 | || hdr->e_version != EV_CURRENT) { | |
470 | link_elf_error("Unsupported file version"); | |
471 | error = ENOEXEC; | |
472 | goto out; | |
473 | } | |
474 | if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) { | |
1c0e3286 | 475 | error = ENOSYS; |
984263bc MD |
476 | goto out; |
477 | } | |
478 | if (hdr->e_machine != ELF_TARG_MACH) { | |
479 | link_elf_error("Unsupported machine"); | |
480 | error = ENOEXEC; | |
481 | goto out; | |
482 | } | |
483 | ||
484 | /* | |
485 | * We rely on the program header being in the first page. This is | |
486 | * not strictly required by the ABI specification, but it seems to | |
487 | * always true in practice. And, it simplifies things considerably. | |
488 | */ | |
489 | if (!((hdr->e_phentsize == sizeof(Elf_Phdr)) && | |
490 | (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= PAGE_SIZE) && | |
491 | (hdr->e_phoff + hdr->e_phnum*sizeof(Elf_Phdr) <= nbytes))) | |
492 | link_elf_error("Unreadable program headers"); | |
493 | ||
494 | /* | |
495 | * Scan the program header entries, and save key information. | |
496 | * | |
497 | * We rely on there being exactly two load segments, text and data, | |
498 | * in that order. | |
499 | */ | |
500 | phdr = (Elf_Phdr *) (firstpage + hdr->e_phoff); | |
501 | phlimit = phdr + hdr->e_phnum; | |
502 | nsegs = 0; | |
503 | phdyn = NULL; | |
984263bc MD |
504 | while (phdr < phlimit) { |
505 | switch (phdr->p_type) { | |
506 | ||
507 | case PT_LOAD: | |
508 | if (nsegs == 2) { | |
509 | link_elf_error("Too many sections"); | |
510 | error = ENOEXEC; | |
511 | goto out; | |
512 | } | |
513 | segs[nsegs] = phdr; | |
514 | ++nsegs; | |
515 | break; | |
516 | ||
517 | case PT_PHDR: | |
984263bc MD |
518 | break; |
519 | ||
520 | case PT_DYNAMIC: | |
521 | phdyn = phdr; | |
522 | break; | |
1c0e3286 SS |
523 | |
524 | case PT_INTERP: | |
525 | error = ENOSYS; | |
526 | goto out; | |
984263bc MD |
527 | } |
528 | ||
529 | ++phdr; | |
530 | } | |
531 | if (phdyn == NULL) { | |
532 | link_elf_error("Object is not dynamically-linked"); | |
533 | error = ENOEXEC; | |
534 | goto out; | |
535 | } | |
536 | ||
537 | /* | |
538 | * Allocate the entire address space of the object, to stake out our | |
539 | * contiguous region, and to establish the base address for relocation. | |
540 | */ | |
984263bc MD |
541 | base_vaddr = trunc_page(segs[0]->p_vaddr); |
542 | base_vlimit = round_page(segs[1]->p_vaddr + segs[1]->p_memsz); | |
543 | mapsize = base_vlimit - base_vaddr; | |
544 | ||
efda3bd0 | 545 | ef = kmalloc(sizeof(struct elf_file), M_LINKER, M_WAITOK | M_ZERO); |
efda3bd0 | 546 | ef->address = kmalloc(mapsize, M_LINKER, M_WAITOK); |
984263bc MD |
547 | mapbase = ef->address; |
548 | ||
549 | /* | |
550 | * Read the text and data sections and zero the bss. | |
551 | */ | |
552 | for (i = 0; i < 2; i++) { | |
553 | caddr_t segbase = mapbase + segs[i]->p_vaddr - base_vaddr; | |
fad57d0e | 554 | error = vn_rdwr(UIO_READ, vp, |
984263bc | 555 | segbase, segs[i]->p_filesz, segs[i]->p_offset, |
87de5057 | 556 | UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid); |
984263bc | 557 | if (error) { |
efda3bd0 | 558 | kfree(ef->address, M_LINKER); |
efda3bd0 | 559 | kfree(ef, M_LINKER); |
984263bc MD |
560 | goto out; |
561 | } | |
562 | bzero(segbase + segs[i]->p_filesz, | |
563 | segs[i]->p_memsz - segs[i]->p_filesz); | |
984263bc MD |
564 | } |
565 | ||
566 | ef->dynamic = (const Elf_Dyn *) (mapbase + phdyn->p_vaddr - base_vaddr); | |
567 | ||
568 | lf = linker_make_file(filename, ef, &link_elf_file_ops); | |
569 | if (lf == NULL) { | |
efda3bd0 | 570 | kfree(ef->address, M_LINKER); |
efda3bd0 | 571 | kfree(ef, M_LINKER); |
984263bc MD |
572 | error = ENOMEM; |
573 | goto out; | |
574 | } | |
575 | lf->address = ef->address; | |
576 | lf->size = mapsize; | |
577 | ||
578 | error = parse_dynamic(lf); | |
579 | if (error) | |
580 | goto out; | |
1c0e3286 SS |
581 | link_elf_reloc_local(lf); |
582 | error = linker_load_dependencies(lf); | |
984263bc MD |
583 | if (error) |
584 | goto out; | |
585 | error = relocate_file(lf); | |
586 | if (error) | |
587 | goto out; | |
588 | ||
589 | /* Try and load the symbol table if it's present. (you can strip it!) */ | |
590 | nbytes = hdr->e_shnum * hdr->e_shentsize; | |
591 | if (nbytes == 0 || hdr->e_shoff == 0) | |
592 | goto nosyms; | |
efda3bd0 | 593 | shdr = kmalloc(nbytes, M_LINKER, M_WAITOK | M_ZERO); |
fad57d0e | 594 | error = vn_rdwr(UIO_READ, vp, |
984263bc | 595 | (caddr_t)shdr, nbytes, hdr->e_shoff, |
87de5057 | 596 | UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid); |
984263bc MD |
597 | if (error) |
598 | goto out; | |
599 | symtabindex = -1; | |
600 | symstrindex = -1; | |
601 | for (i = 0; i < hdr->e_shnum; i++) { | |
602 | if (shdr[i].sh_type == SHT_SYMTAB) { | |
603 | symtabindex = i; | |
604 | symstrindex = shdr[i].sh_link; | |
605 | } | |
606 | } | |
607 | if (symtabindex < 0 || symstrindex < 0) | |
608 | goto nosyms; | |
609 | ||
610 | symcnt = shdr[symtabindex].sh_size; | |
efda3bd0 | 611 | ef->symbase = kmalloc(symcnt, M_LINKER, M_WAITOK); |
984263bc | 612 | strcnt = shdr[symstrindex].sh_size; |
efda3bd0 | 613 | ef->strbase = kmalloc(strcnt, M_LINKER, M_WAITOK); |
fad57d0e | 614 | error = vn_rdwr(UIO_READ, vp, |
984263bc | 615 | ef->symbase, symcnt, shdr[symtabindex].sh_offset, |
87de5057 | 616 | UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid); |
984263bc MD |
617 | if (error) |
618 | goto out; | |
fad57d0e | 619 | error = vn_rdwr(UIO_READ, vp, |
984263bc | 620 | ef->strbase, strcnt, shdr[symstrindex].sh_offset, |
87de5057 | 621 | UIO_SYSSPACE, IO_NODELOCKED, p->p_ucred, &resid); |
984263bc MD |
622 | if (error) |
623 | goto out; | |
624 | ||
625 | ef->ddbsymcnt = symcnt / sizeof(Elf_Sym); | |
626 | ef->ddbsymtab = (const Elf_Sym *)ef->symbase; | |
627 | ef->ddbstrcnt = strcnt; | |
628 | ef->ddbstrtab = ef->strbase; | |
629 | ||
984263bc MD |
630 | nosyms: |
631 | ||
632 | *result = lf; | |
633 | ||
634 | out: | |
635 | if (error && lf) | |
636 | linker_file_unload(lf); | |
637 | if (shdr) | |
efda3bd0 | 638 | kfree(shdr, M_LINKER); |
984263bc | 639 | if (firstpage) |
efda3bd0 | 640 | kfree(firstpage, M_LINKER); |
a11aaa81 | 641 | vn_unlock(vp); |
3596743e | 642 | vn_close(vp, FREAD, NULL); |
984263bc MD |
643 | |
644 | return error; | |
645 | } | |
646 | ||
1c0e3286 SS |
647 | Elf_Addr |
648 | elf_relocaddr(linker_file_t lf, Elf_Addr x) | |
649 | { | |
77a4bf30 | 650 | #if 0 |
1c0e3286 SS |
651 | elf_file_t ef; |
652 | ||
653 | ef = lf->priv; | |
1c0e3286 SS |
654 | if (x >= ef->pcpu_start && x < ef->pcpu_stop) |
655 | return ((x - ef->pcpu_start) + ef->pcpu_base); | |
656 | #ifdef VIMAGE | |
657 | if (x >= ef->vnet_start && x < ef->vnet_stop) | |
658 | return ((x - ef->vnet_start) + ef->vnet_base); | |
659 | #endif | |
660 | #endif | |
661 | return (x); | |
662 | } | |
663 | ||
984263bc MD |
664 | static void |
665 | link_elf_unload_file(linker_file_t file) | |
666 | { | |
667 | elf_file_t ef = file->priv; | |
668 | ||
669 | if (ef) { | |
984263bc | 670 | if (ef->address) |
efda3bd0 | 671 | kfree(ef->address, M_LINKER); |
984263bc | 672 | if (ef->symbase) |
efda3bd0 | 673 | kfree(ef->symbase, M_LINKER); |
984263bc | 674 | if (ef->strbase) |
efda3bd0 MD |
675 | kfree(ef->strbase, M_LINKER); |
676 | kfree(ef, M_LINKER); | |
984263bc MD |
677 | } |
678 | } | |
679 | ||
680 | static void | |
681 | link_elf_unload_module(linker_file_t file) | |
682 | { | |
683 | elf_file_t ef = file->priv; | |
684 | ||
685 | if (ef) | |
efda3bd0 | 686 | kfree(ef, M_LINKER); |
135d05a5 AL |
687 | if (file->pathname) |
688 | preload_delete_name(file->pathname); | |
984263bc MD |
689 | } |
690 | ||
984263bc | 691 | static const char * |
d5fc85d0 | 692 | symbol_name(elf_file_t ef, Elf_Size r_info) |
984263bc MD |
693 | { |
694 | const Elf_Sym *ref; | |
695 | ||
696 | if (ELF_R_SYM(r_info)) { | |
697 | ref = ef->symtab + ELF_R_SYM(r_info); | |
698 | return ef->strtab + ref->st_name; | |
699 | } else | |
700 | return NULL; | |
701 | } | |
702 | ||
703 | static int | |
704 | relocate_file(linker_file_t lf) | |
705 | { | |
706 | elf_file_t ef = lf->priv; | |
707 | const Elf_Rel *rellim; | |
708 | const Elf_Rel *rel; | |
709 | const Elf_Rela *relalim; | |
710 | const Elf_Rela *rela; | |
711 | const char *symname; | |
712 | ||
713 | /* Perform relocations without addend if there are any: */ | |
714 | rel = ef->rel; | |
715 | if (rel) { | |
716 | rellim = (const Elf_Rel *)((const char *)ef->rel + ef->relsize); | |
717 | while (rel < rellim) { | |
1c0e3286 SS |
718 | if (elf_reloc(lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL, elf_lookup)) { |
719 | symname = symbol_name(ef, rel->r_info); | |
6ea70f76 | 720 | kprintf("link_elf: symbol %s undefined\n", symname); |
984263bc MD |
721 | return ENOENT; |
722 | } | |
723 | rel++; | |
724 | } | |
725 | } | |
726 | ||
727 | /* Perform relocations with addend if there are any: */ | |
728 | rela = ef->rela; | |
729 | if (rela) { | |
730 | relalim = (const Elf_Rela *)((const char *)ef->rela + ef->relasize); | |
731 | while (rela < relalim) { | |
1c0e3286 SS |
732 | if (elf_reloc(lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA, elf_lookup)) { |
733 | symname = symbol_name(ef, rela->r_info); | |
6ea70f76 | 734 | kprintf("link_elf: symbol %s undefined\n", symname); |
984263bc MD |
735 | return ENOENT; |
736 | } | |
737 | rela++; | |
738 | } | |
739 | } | |
740 | ||
741 | /* Perform PLT relocations without addend if there are any: */ | |
742 | rel = ef->pltrel; | |
743 | if (rel) { | |
744 | rellim = (const Elf_Rel *)((const char *)ef->pltrel + ef->pltrelsize); | |
745 | while (rel < rellim) { | |
1c0e3286 SS |
746 | if (elf_reloc(lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL, elf_lookup)) { |
747 | symname = symbol_name(ef, rel->r_info); | |
6ea70f76 | 748 | kprintf("link_elf: symbol %s undefined\n", symname); |
984263bc MD |
749 | return ENOENT; |
750 | } | |
751 | rel++; | |
752 | } | |
753 | } | |
754 | ||
755 | /* Perform relocations with addend if there are any: */ | |
756 | rela = ef->pltrela; | |
757 | if (rela) { | |
758 | relalim = (const Elf_Rela *)((const char *)ef->pltrela + ef->pltrelasize); | |
759 | while (rela < relalim) { | |
760 | symname = symbol_name(ef, rela->r_info); | |
1c0e3286 | 761 | if (elf_reloc(lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA, elf_lookup)) { |
6ea70f76 | 762 | kprintf("link_elf: symbol %s undefined\n", symname); |
984263bc MD |
763 | return ENOENT; |
764 | } | |
765 | rela++; | |
766 | } | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Hash function for symbol table lookup. Don't even think about changing | |
774 | * this. It is specified by the System V ABI. | |
775 | */ | |
776 | static unsigned long | |
777 | elf_hash(const char *name) | |
778 | { | |
779 | const unsigned char *p = (const unsigned char *) name; | |
780 | unsigned long h = 0; | |
781 | unsigned long g; | |
782 | ||
783 | while (*p != '\0') { | |
784 | h = (h << 4) + *p++; | |
785 | if ((g = h & 0xf0000000) != 0) | |
786 | h ^= g >> 24; | |
787 | h &= ~g; | |
788 | } | |
789 | return h; | |
790 | } | |
791 | ||
59b728a7 | 792 | static int |
984263bc MD |
793 | link_elf_lookup_symbol(linker_file_t lf, const char* name, c_linker_sym_t* sym) |
794 | { | |
795 | elf_file_t ef = lf->priv; | |
796 | unsigned long symnum; | |
797 | const Elf_Sym* symp; | |
798 | const char *strp; | |
799 | unsigned long hash; | |
800 | int i; | |
801 | ||
1c0e3286 SS |
802 | /* If we don't have a hash, bail. */ |
803 | if (ef->buckets == NULL || ef->nbuckets == 0) { | |
804 | kprintf("link_elf_lookup_symbol: missing symbol hash table\n"); | |
805 | return ENOENT; | |
806 | } | |
807 | ||
984263bc MD |
808 | /* First, search hashed global symbols */ |
809 | hash = elf_hash(name); | |
810 | symnum = ef->buckets[hash % ef->nbuckets]; | |
811 | ||
812 | while (symnum != STN_UNDEF) { | |
813 | if (symnum >= ef->nchains) { | |
6ea70f76 | 814 | kprintf("link_elf_lookup_symbol: corrupt symbol table\n"); |
984263bc MD |
815 | return ENOENT; |
816 | } | |
817 | ||
818 | symp = ef->symtab + symnum; | |
819 | if (symp->st_name == 0) { | |
6ea70f76 | 820 | kprintf("link_elf_lookup_symbol: corrupt symbol table\n"); |
984263bc MD |
821 | return ENOENT; |
822 | } | |
823 | ||
824 | strp = ef->strtab + symp->st_name; | |
825 | ||
826 | if (strcmp(name, strp) == 0) { | |
827 | if (symp->st_shndx != SHN_UNDEF || | |
828 | (symp->st_value != 0 && | |
d1786c1b MD |
829 | ELF_ST_TYPE(symp->st_info) == STT_FUNC) |
830 | ) { | |
984263bc MD |
831 | *sym = (c_linker_sym_t) symp; |
832 | return 0; | |
d1786c1b | 833 | } else { |
984263bc | 834 | return ENOENT; |
d1786c1b | 835 | } |
984263bc MD |
836 | } |
837 | ||
838 | symnum = ef->chains[symnum]; | |
839 | } | |
840 | ||
841 | /* If we have not found it, look at the full table (if loaded) */ | |
842 | if (ef->symtab == ef->ddbsymtab) | |
843 | return ENOENT; | |
844 | ||
845 | /* Exhaustive search */ | |
846 | for (i = 0, symp = ef->ddbsymtab; i < ef->ddbsymcnt; i++, symp++) { | |
847 | strp = ef->ddbstrtab + symp->st_name; | |
848 | if (strcmp(name, strp) == 0) { | |
849 | if (symp->st_shndx != SHN_UNDEF || | |
850 | (symp->st_value != 0 && | |
851 | ELF_ST_TYPE(symp->st_info) == STT_FUNC)) { | |
852 | *sym = (c_linker_sym_t) symp; | |
853 | return 0; | |
d1786c1b | 854 | } else { |
984263bc | 855 | return ENOENT; |
d1786c1b | 856 | } |
984263bc MD |
857 | } |
858 | } | |
984263bc MD |
859 | return ENOENT; |
860 | } | |
861 | ||
862 | static int | |
1c0e3286 | 863 | link_elf_symbol_values(linker_file_t lf, c_linker_sym_t sym, linker_symval_t *symval) |
984263bc | 864 | { |
1c0e3286 SS |
865 | elf_file_t ef = lf->priv; |
866 | const Elf_Sym *es = (const Elf_Sym *)sym; | |
867 | ||
57e09377 MD |
868 | symval->value = 0; /* avoid gcc warnings */ |
869 | ||
90b407c1 | 870 | if (es >= ef->symtab && es < (ef->symtab + ef->nchains)) { |
1c0e3286 | 871 | symval->name = ef->strtab + es->st_name; |
51295aee | 872 | symval->value = ef->address + es->st_value; |
1c0e3286 SS |
873 | symval->size = es->st_size; |
874 | return 0; | |
875 | } | |
876 | if (ef->symtab == ef->ddbsymtab) | |
984263bc | 877 | return ENOENT; |
90b407c1 | 878 | if (es >= ef->ddbsymtab && es < (ef->ddbsymtab + ef->ddbsymcnt)) { |
1c0e3286 | 879 | symval->name = ef->ddbstrtab + es->st_name; |
51295aee | 880 | symval->value = ef->address + es->st_value; |
1c0e3286 SS |
881 | symval->size = es->st_size; |
882 | return 0; | |
883 | } | |
884 | return ENOENT; | |
984263bc MD |
885 | } |
886 | ||
887 | static int | |
888 | link_elf_search_symbol(linker_file_t lf, caddr_t value, | |
1c0e3286 | 889 | c_linker_sym_t *sym, long *diffp) |
984263bc | 890 | { |
1c0e3286 SS |
891 | elf_file_t ef = lf->priv; |
892 | u_long off = (uintptr_t)(void *)value; | |
893 | u_long diff = off; | |
894 | u_long st_value; | |
895 | const Elf_Sym *es; | |
4090d6ff | 896 | const Elf_Sym *best = NULL; |
1c0e3286 SS |
897 | int i; |
898 | ||
899 | for (i = 0, es = ef->ddbsymtab; i < ef->ddbsymcnt; i++, es++) { | |
900 | if (es->st_name == 0) | |
901 | continue; | |
902 | st_value = es->st_value + (uintptr_t)(void *)ef->address; | |
903 | if (off >= st_value) { | |
904 | if (off - st_value < diff) { | |
905 | diff = off - st_value; | |
906 | best = es; | |
907 | if (diff == 0) | |
908 | break; | |
909 | } else if (off - st_value == diff) { | |
910 | best = es; | |
911 | } | |
984263bc | 912 | } |
1c0e3286 | 913 | } |
4090d6ff | 914 | if (best == NULL) |
1c0e3286 SS |
915 | *diffp = off; |
916 | else | |
917 | *diffp = diff; | |
918 | *sym = (c_linker_sym_t) best; | |
984263bc | 919 | |
1c0e3286 | 920 | return 0; |
984263bc | 921 | } |
dc62b251 MD |
922 | |
923 | /* | |
924 | * Look up a linker set on an ELF system. | |
925 | */ | |
926 | static int | |
927 | link_elf_lookup_set(linker_file_t lf, const char *name, | |
1c0e3286 | 928 | void ***startp, void ***stopp, int *countp) |
dc62b251 | 929 | { |
1c0e3286 SS |
930 | c_linker_sym_t sym; |
931 | linker_symval_t symval; | |
932 | char *setsym; | |
933 | void **start, **stop; | |
934 | int len, error = 0, count; | |
935 | ||
936 | len = strlen(name) + sizeof("__start_set_"); /* sizeof includes \0 */ | |
937 | setsym = kmalloc(len, M_LINKER, M_WAITOK); | |
938 | ||
939 | /* get address of first entry */ | |
940 | ksnprintf(setsym, len, "%s%s", "__start_set_", name); | |
941 | error = link_elf_lookup_symbol(lf, setsym, &sym); | |
942 | if (error) | |
943 | goto out; | |
944 | link_elf_symbol_values(lf, sym, &symval); | |
d8061892 | 945 | if (symval.value == NULL) { |
1c0e3286 SS |
946 | error = ESRCH; |
947 | goto out; | |
948 | } | |
949 | start = (void **)symval.value; | |
950 | ||
951 | /* get address of last entry */ | |
952 | ksnprintf(setsym, len, "%s%s", "__stop_set_", name); | |
953 | error = link_elf_lookup_symbol(lf, setsym, &sym); | |
954 | if (error) | |
955 | goto out; | |
956 | link_elf_symbol_values(lf, sym, &symval); | |
d8061892 | 957 | if (symval.value == NULL) { |
1c0e3286 SS |
958 | error = ESRCH; |
959 | goto out; | |
960 | } | |
961 | stop = (void **)symval.value; | |
dc62b251 | 962 | |
1c0e3286 SS |
963 | /* and the number of entries */ |
964 | count = stop - start; | |
dc62b251 | 965 | |
1c0e3286 SS |
966 | /* and copy out */ |
967 | if (startp) | |
968 | *startp = start; | |
969 | if (stopp) | |
970 | *stopp = stop; | |
971 | if (countp) | |
972 | *countp = count; | |
dc62b251 | 973 | |
1c0e3286 SS |
974 | out: |
975 | kfree(setsym, M_LINKER); | |
976 | return error; | |
977 | } | |
978 | ||
979 | /* | |
980 | * Symbol lookup function that can be used when the symbol index is known (ie | |
981 | * in relocations). It uses the symbol index instead of doing a fully fledged | |
982 | * hash table based lookup when such is valid. For example for local symbols. | |
983 | * This is not only more efficient, it's also more correct. It's not always | |
984 | * the case that the symbol can be found through the hash table. | |
985 | */ | |
986 | static int | |
987 | elf_lookup(linker_file_t lf, Elf_Size symidx, int deps, Elf_Addr *result) | |
988 | { | |
989 | elf_file_t ef = lf->priv; | |
990 | const Elf_Sym *sym; | |
991 | const char *symbol; | |
992 | ||
993 | /* Don't even try to lookup the symbol if the index is bogus. */ | |
994 | if (symidx >= ef->nchains) | |
995 | return (ENOENT); | |
996 | ||
997 | sym = ef->symtab + symidx; | |
998 | ||
999 | /* | |
1000 | * Don't do a full lookup when the symbol is local. It may even | |
1001 | * fail because it may not be found through the hash table. | |
1002 | */ | |
1003 | if (ELF_ST_BIND(sym->st_info) == STB_LOCAL) { | |
1004 | /* Force lookup failure when we have an insanity. */ | |
1005 | if (sym->st_shndx == SHN_UNDEF || sym->st_value == 0) | |
1006 | return (ENOENT); | |
1007 | return ((Elf_Addr) ef->address + sym->st_value); | |
1008 | } | |
1009 | /* | |
1010 | * XXX we can avoid doing a hash table based lookup for global | |
1011 | * symbols as well. This however is not always valid, so we'll | |
1012 | * just do it the hard way for now. Performance tweaks can | |
1013 | * always be added. | |
1014 | */ | |
1015 | ||
1016 | symbol = ef->strtab + sym->st_name; | |
1017 | ||
1018 | /* Force a lookup failure if the symbol name is bogus. */ | |
1019 | if (*symbol == 0) | |
1020 | return (ENOENT); | |
1021 | ||
1022 | return (linker_file_lookup_symbol(lf, symbol, deps, (caddr_t *)result)); | |
dc62b251 | 1023 | } |
1c0e3286 SS |
1024 | static void |
1025 | link_elf_reloc_local(linker_file_t lf) | |
1026 | { | |
1027 | elf_file_t ef = lf->priv; | |
1028 | const Elf_Rel *rellim; | |
1029 | const Elf_Rel *rel; | |
1030 | const Elf_Rela *relalim; | |
1031 | const Elf_Rela *rela; | |
1032 | ||
1033 | /* Perform relocations without addend if there are any: */ | |
1034 | if ((rel = ef->rel) != NULL) { | |
1035 | rellim = (const Elf_Rel *)((const char *)ef->rel + ef->relsize); | |
1036 | while (rel < rellim) { | |
1037 | elf_reloc_local(lf, (Elf_Addr)ef->address, rel, ELF_RELOC_REL, | |
1038 | elf_lookup); | |
1039 | rel++; | |
1040 | } | |
1041 | } | |
dc62b251 | 1042 | |
1c0e3286 SS |
1043 | /* Perform relocations with addend if there are any: */ |
1044 | if ((rela = ef->rela) != NULL) { | |
1045 | relalim = (const Elf_Rela *)((const char *)ef->rela + ef->relasize); | |
1046 | while (rela < relalim) { | |
1047 | elf_reloc_local(lf, (Elf_Addr)ef->address, rela, ELF_RELOC_RELA, | |
1048 | elf_lookup); | |
1049 | rela++; | |
1050 | } | |
1051 | } | |
1052 | } |