1 /* vi: set sw=4 ts=4: */
3 * This file contains the helper routines to load an ELF shared
4 * library into memory and add the symbol table info to the chain.
6 * Copyright (C) 2000-2006 by Erik Andersen <andersen@codepoet.org>
7 * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
8 * David Engel, Hongjiu Lu and Mitch D'Souza
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. The name of the above contributors may not be
16 * used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #ifdef __LDSO_CACHE_SUPPORT__
37 static caddr_t _dl_cache_addr = NULL;
38 static size_t _dl_cache_size = 0;
40 int _dl_map_cache(void)
48 if (_dl_cache_addr == (caddr_t) - 1)
50 else if (_dl_cache_addr != NULL)
53 if (_dl_stat(LDSO_CACHE, &st)
54 || (fd = _dl_open(LDSO_CACHE, O_RDONLY, 0)) < 0) {
55 _dl_cache_addr = (caddr_t) - 1; /* so we won't try again */
59 _dl_cache_size = st.st_size;
60 _dl_cache_addr = (caddr_t) _dl_mmap(0, _dl_cache_size, PROT_READ, MAP_SHARED, fd, 0);
62 if (_dl_mmap_check_error(_dl_cache_addr)) {
63 _dl_dprintf(2, "%s:%i: can't map '%s'\n",
64 _dl_progname, __LINE__, LDSO_CACHE);
68 header = (header_t *) _dl_cache_addr;
70 if (_dl_cache_size < sizeof(header_t) ||
71 _dl_memcmp(header->magic, LDSO_CACHE_MAGIC, LDSO_CACHE_MAGIC_LEN)
72 || _dl_memcmp(header->version, LDSO_CACHE_VER, LDSO_CACHE_VER_LEN)
74 (sizeof(header_t) + header->nlibs * sizeof(libentry_t))
75 || _dl_cache_addr[_dl_cache_size - 1] != '\0')
77 _dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname,
82 strtabsize = _dl_cache_size - sizeof(header_t) -
83 header->nlibs * sizeof(libentry_t);
84 libent = (libentry_t *) & header[1];
86 for (i = 0; i < header->nlibs; i++) {
87 if (libent[i].sooffset >= strtabsize ||
88 libent[i].liboffset >= strtabsize)
90 _dl_dprintf(2, "%s: cache '%s' is corrupt\n", _dl_progname, LDSO_CACHE);
98 _dl_munmap(_dl_cache_addr, _dl_cache_size);
99 _dl_cache_addr = (caddr_t) - 1;
103 int _dl_unmap_cache(void)
105 if (_dl_cache_addr == NULL || _dl_cache_addr == (caddr_t) - 1)
109 _dl_munmap(_dl_cache_addr, _dl_cache_size);
110 _dl_cache_addr = NULL;
119 _dl_protect_relro (struct elf_resolve *l)
121 ElfW(Addr) start = ((l->loadaddr + l->relro_addr)
122 & ~(_dl_pagesize - 1));
123 ElfW(Addr) end = ((l->loadaddr + l->relro_addr + l->relro_size)
124 & ~(_dl_pagesize - 1));
125 _dl_if_debug_dprint("RELRO protecting %s: start:%x, end:%x\n", l->libname, start, end);
127 _dl_mprotect ((void *) start, end - start, PROT_READ) < 0) {
128 _dl_dprintf(2, "%s: cannot apply additional memory protection after relocation", l->libname);
133 /* This function's behavior must exactly match that
134 * in uClibc/ldso/util/ldd.c */
135 static struct elf_resolve *
136 search_for_named_library(const char *name, int secure, const char *path_list,
137 struct dyn_elf **rpnt)
139 char *path, *path_n, *mylibname;
140 struct elf_resolve *tpnt;
146 /* We need a writable copy of this string, but we don't
147 * need this allocated permanently since we don't want
148 * to leak memory, so use alloca to put path on the stack */
149 done = _dl_strlen(path_list);
150 path = alloca(done + 1);
152 /* another bit of local storage */
153 mylibname = alloca(2050);
155 /* gcc inlines alloca using a single instruction adjusting
156 * the stack pointer and no stack overflow check and thus
157 * no NULL error return. No point leaving in dead code... */
159 if (!path || !mylibname) {
160 _dl_dprintf(2, "Out of memory!\n");
165 _dl_memcpy(path, path_list, done+1);
167 /* Unlike ldd.c, don't bother to eliminate double //s */
169 /* Replace colons with zeros in path_list */
170 /* : at the beginning or end of path maps to CWD */
171 /* :: anywhere maps CWD */
183 _dl_strcpy(mylibname, path_n);
185 _dl_strcpy(mylibname, "."); /* Assume current dir if empty path */
186 _dl_strcat(mylibname, "/");
187 _dl_strcat(mylibname, name);
188 if ((tpnt = _dl_load_elf_shared_library(secure, rpnt, mylibname)) != NULL)
197 /* Used to return error codes back to dlopen et. al. */
198 unsigned long _dl_error_number;
199 unsigned long _dl_internal_error_number;
201 struct elf_resolve *_dl_load_shared_library(int secure, struct dyn_elf **rpnt,
202 struct elf_resolve *tpnt, char *full_libname, int __attribute__((unused)) trace_loaded_objects)
205 struct elf_resolve *tpnt1;
208 _dl_internal_error_number = 0;
209 libname = full_libname;
211 /* quick hack to ensure mylibname buffer doesn't overflow. don't
212 allow full_libname or any directory to be longer than 1024. */
213 if (_dl_strlen(full_libname) > 1024)
216 /* Skip over any initial initial './' and '/' stuff to
217 * get the short form libname with no path garbage */
218 pnt = _dl_strrchr(libname, '/');
223 _dl_if_debug_dprint("\tfind library='%s'; searching\n", libname);
224 /* If the filename has any '/', try it straight and leave it at that.
225 For IBCS2 compatibility under linux, we substitute the string
226 /usr/i486-sysv4/lib for /usr/lib in library names. */
228 if (libname != full_libname) {
229 _dl_if_debug_dprint("\ttrying file='%s'\n", full_libname);
230 tpnt1 = _dl_load_elf_shared_library(secure, rpnt, full_libname);
237 * The ABI specifies that RPATH is searched before LD_LIBRARY_PATH or
238 * the default path of /usr/lib. Check in rpath directories.
240 #ifdef __LDSO_RUNPATH__
241 pnt = (tpnt ? (char *) tpnt->dynamic_info[DT_RPATH] : NULL);
243 pnt += (unsigned long) tpnt->dynamic_info[DT_STRTAB];
244 _dl_if_debug_dprint("\tsearching RPATH='%s'\n", pnt);
245 if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt)) != NULL)
250 /* Check in LD_{ELF_}LIBRARY_PATH, if specified and allowed */
251 if (_dl_library_path) {
252 _dl_if_debug_dprint("\tsearching LD_LIBRARY_PATH='%s'\n", _dl_library_path);
253 if ((tpnt1 = search_for_named_library(libname, secure, _dl_library_path, rpnt)) != NULL)
260 * The ABI specifies that RUNPATH is searched after LD_LIBRARY_PATH.
262 #ifdef __LDSO_RUNPATH__
263 pnt = (tpnt ? (char *)tpnt->dynamic_info[DT_RUNPATH] : NULL);
265 pnt += (unsigned long) tpnt->dynamic_info[DT_STRTAB];
266 _dl_if_debug_dprint("\tsearching RUNPATH='%s'\n", pnt);
267 if ((tpnt1 = search_for_named_library(libname, secure, pnt, rpnt)) != NULL)
273 * Where should the cache be searched? There is no such concept in the
274 * ABI, so we have some flexibility here. For now, search it before
275 * the hard coded paths that follow (i.e before /lib and /usr/lib).
277 #ifdef __LDSO_CACHE_SUPPORT__
278 if (_dl_cache_addr != NULL && _dl_cache_addr != (caddr_t) - 1) {
280 header_t *header = (header_t *) _dl_cache_addr;
281 libentry_t *libent = (libentry_t *) & header[1];
282 char *strs = (char *) &libent[header->nlibs];
284 _dl_if_debug_dprint("\tsearching cache='%s'\n", LDSO_CACHE);
285 for (i = 0; i < header->nlibs; i++) {
286 if ((libent[i].flags == LIB_ELF ||
287 libent[i].flags == LIB_ELF_LIBC0 ||
288 libent[i].flags == LIB_ELF_LIBC5) &&
289 _dl_strcmp(libname, strs + libent[i].sooffset) == 0 &&
290 (tpnt1 = _dl_load_elf_shared_library(secure,
291 rpnt, strs + libent[i].liboffset)))
297 /* Look for libraries wherever the shared library loader
299 _dl_if_debug_dprint("\tsearching ldso dir='%s'\n", _dl_ldsopath);
300 if ((tpnt1 = search_for_named_library(libname, secure, _dl_ldsopath, rpnt)) != NULL)
306 /* Lastly, search the standard list of paths for the library.
307 This list must exactly match the list in uClibc/ldso/util/ldd.c */
308 _dl_if_debug_dprint("\tsearching full lib path list\n");
309 if ((tpnt1 = search_for_named_library(libname, secure,
310 UCLIBC_RUNTIME_PREFIX "lib:"
311 UCLIBC_RUNTIME_PREFIX "usr/lib"
312 #ifndef __LDSO_CACHE_SUPPORT__
313 ":" UCLIBC_RUNTIME_PREFIX "usr/X11R6/lib"
322 /* Well, we shot our wad on that one. All we can do now is punt */
323 if (_dl_internal_error_number)
324 _dl_error_number = _dl_internal_error_number;
326 _dl_error_number = LD_ERROR_NOFILE;
327 _dl_if_debug_dprint("Bummer: could not find '%s'!\n", libname);
333 * Read one ELF library into memory, mmap it into the correct locations and
334 * add the symbol info to the symbol chain. Perform any relocations that
338 struct elf_resolve *_dl_load_elf_shared_library(int secure,
339 struct dyn_elf **rpnt, char *libname)
342 unsigned long dynamic_addr = 0;
344 struct elf_resolve *tpnt;
346 char *status, *header;
347 unsigned long dynamic_info[DYNAMIC_SIZE];
349 unsigned long libaddr;
350 unsigned long minvma = 0xffffffff, maxvma = 0;
351 int i, flags, piclib, infile;
352 ElfW(Addr) relro_addr = 0;
353 size_t relro_size = 0;
357 infile = _dl_open(libname, O_RDONLY, 0);
359 _dl_internal_error_number = LD_ERROR_NOFILE;
363 if (_dl_fstat(infile, &st) < 0) {
364 _dl_internal_error_number = LD_ERROR_NOFILE;
368 /* If we are in secure mode (i.e. a setu/gid binary using LD_PRELOAD),
369 we don't load the library if it isn't setuid. */
371 if (!(st.st_mode & S_ISUID)) {
376 /* Check if file is already loaded */
377 for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
378 if (tpnt->st_dev == st.st_dev && tpnt->st_ino == st.st_ino) {
385 header = _dl_mmap((void *) 0, _dl_pagesize, PROT_READ | PROT_WRITE,
386 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
387 if (_dl_mmap_check_error(header)) {
388 _dl_dprintf(2, "%s:%i: can't map '%s'\n", _dl_progname, __LINE__, libname);
389 _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
394 _dl_read(infile, header, _dl_pagesize);
395 epnt = (ElfW(Ehdr) *) (intptr_t) header;
396 if (epnt->e_ident[0] != 0x7f ||
397 epnt->e_ident[1] != 'E' ||
398 epnt->e_ident[2] != 'L' ||
399 epnt->e_ident[3] != 'F')
401 _dl_dprintf(2, "%s: '%s' is not an ELF file\n", _dl_progname,
403 _dl_internal_error_number = LD_ERROR_NOTELF;
405 _dl_munmap(header, _dl_pagesize);
409 if ((epnt->e_type != ET_DYN) || (epnt->e_machine != MAGIC1
411 && epnt->e_machine != MAGIC2
415 _dl_internal_error_number =
416 (epnt->e_type != ET_DYN ? LD_ERROR_NOTDYN : LD_ERROR_NOTMAGIC);
417 _dl_dprintf(2, "%s: '%s' is not an ELF executable for " ELF_TARGET
418 "\n", _dl_progname, libname);
420 _dl_munmap(header, _dl_pagesize);
424 ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
427 for (i = 0; i < epnt->e_phnum; i++) {
429 if (ppnt->p_type == PT_DYNAMIC) {
431 _dl_dprintf(2, "%s: '%s' has more than one dynamic section\n",
432 _dl_progname, libname);
433 dynamic_addr = ppnt->p_vaddr;
436 if (ppnt->p_type == PT_LOAD) {
437 /* See if this is a PIC library. */
438 if (i == 0 && ppnt->p_vaddr > 0x1000000) {
440 minvma = ppnt->p_vaddr;
442 if (piclib && ppnt->p_vaddr < minvma) {
443 minvma = ppnt->p_vaddr;
445 if (((unsigned long) ppnt->p_vaddr + ppnt->p_memsz) > maxvma) {
446 maxvma = ppnt->p_vaddr + ppnt->p_memsz;
452 maxvma = (maxvma + ADDR_ALIGN) & ~ADDR_ALIGN;
453 minvma = minvma & ~0xffffU;
455 flags = MAP_PRIVATE /*| MAP_DENYWRITE */ ;
459 status = (char *) _dl_mmap((char *) (piclib ? 0 : minvma),
460 maxvma - minvma, PROT_NONE, flags | MAP_ANONYMOUS, -1, 0);
461 if (_dl_mmap_check_error(status)) {
462 _dl_dprintf(2, "%s:%i: can't map '%s'\n", _dl_progname, __LINE__, libname);
463 _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
465 _dl_munmap(header, _dl_pagesize);
468 libaddr = (unsigned long) status;
471 /* Get the memory to store the library */
472 ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
474 for (i = 0; i < epnt->e_phnum; i++) {
475 if (ppnt->p_type == PT_GNU_RELRO) {
476 relro_addr = ppnt->p_vaddr;
477 relro_size = ppnt->p_memsz;
479 if (ppnt->p_type == PT_LOAD) {
481 /* See if this is a PIC library. */
482 if (i == 0 && ppnt->p_vaddr > 0x1000000) {
484 /* flags |= MAP_FIXED; */
487 if (ppnt->p_flags & PF_W) {
488 unsigned long map_size;
491 status = (char *) _dl_mmap((char *) ((piclib ? libaddr : 0) +
492 (ppnt->p_vaddr & PAGE_ALIGN)), (ppnt->p_vaddr & ADDR_ALIGN)
493 + ppnt->p_filesz, LXFLAGS(ppnt->p_flags), flags, infile,
494 ppnt->p_offset & OFFS_ALIGN);
496 if (_dl_mmap_check_error(status)) {
497 _dl_dprintf(2, "%s:%i: can't map '%s'\n",
498 _dl_progname, __LINE__, libname);
499 _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
500 _dl_munmap((char *) libaddr, maxvma - minvma);
502 _dl_munmap(header, _dl_pagesize);
506 /* Pad the last page with zeroes. */
507 cpnt = (char *) (status + (ppnt->p_vaddr & ADDR_ALIGN) +
509 while (((unsigned long) cpnt) & ADDR_ALIGN)
512 /* I am not quite sure if this is completely
513 * correct to do or not, but the basic way that
514 * we handle bss segments is that we mmap
515 * /dev/zero if there are any pages left over
516 * that are not mapped as part of the file */
518 map_size = (ppnt->p_vaddr + ppnt->p_filesz + ADDR_ALIGN) & PAGE_ALIGN;
520 if (map_size < ppnt->p_vaddr + ppnt->p_memsz)
521 status = (char *) _dl_mmap((char *) map_size +
522 (piclib ? libaddr : 0),
523 ppnt->p_vaddr + ppnt->p_memsz - map_size,
524 LXFLAGS(ppnt->p_flags), flags | MAP_ANONYMOUS, -1, 0);
526 status = (char *) _dl_mmap((char *) (ppnt->p_vaddr & PAGE_ALIGN)
527 + (piclib ? libaddr : 0), (ppnt->p_vaddr & ADDR_ALIGN) +
528 ppnt->p_filesz, LXFLAGS(ppnt->p_flags), flags,
529 infile, ppnt->p_offset & OFFS_ALIGN);
530 if (_dl_mmap_check_error(status)) {
531 _dl_dprintf(2, "%s:%i: can't map '%s'\n", _dl_progname, __LINE__, libname);
532 _dl_internal_error_number = LD_ERROR_MMAP_FAILED;
533 _dl_munmap((char *) libaddr, maxvma - minvma);
535 _dl_munmap(header, _dl_pagesize);
539 /* if (libaddr == 0 && piclib) {
540 libaddr = (unsigned long) status;
548 /* For a non-PIC library, the addresses are all absolute */
550 dynamic_addr += (unsigned long) libaddr;
554 * OK, the ELF library is now loaded into VM in the correct locations
555 * The next step is to go through and do the dynamic linking (if needed).
558 /* Start by scanning the dynamic section to get all of the pointers */
561 _dl_internal_error_number = LD_ERROR_NODYNAMIC;
562 _dl_dprintf(2, "%s: '%s' is missing a dynamic section\n",
563 _dl_progname, libname);
564 _dl_munmap(header, _dl_pagesize);
568 dpnt = (ElfW(Dyn) *) dynamic_addr;
569 _dl_memset(dynamic_info, 0, sizeof(dynamic_info));
570 _dl_parse_dynamic_info(dpnt, dynamic_info, NULL, libaddr);
571 /* If the TEXTREL is set, this means that we need to make the pages
572 writable before we perform relocations. Do this now. They get set
575 if (dynamic_info[DT_TEXTREL]) {
576 #ifndef __FORCE_SHAREABLE_TEXT_SEGMENTS__
577 ppnt = (ElfW(Phdr) *)(intptr_t) & header[epnt->e_phoff];
578 for (i = 0; i < epnt->e_phnum; i++, ppnt++) {
579 if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
580 _dl_mprotect((void *) ((piclib ? libaddr : 0) +
581 (ppnt->p_vaddr & PAGE_ALIGN)),
582 (ppnt->p_vaddr & ADDR_ALIGN) + (unsigned long) ppnt->p_filesz,
583 PROT_READ | PROT_WRITE | PROT_EXEC);
586 _dl_dprintf(_dl_debug_file, "Can't modify %s's text section. Use GCC option -fPIC for shared objects, please.\n",libname);
591 tpnt = _dl_add_elf_hash_table(libname, (char *) libaddr, dynamic_info,
593 tpnt->relro_addr = relro_addr;
594 tpnt->relro_size = relro_size;
595 tpnt->st_dev = st.st_dev;
596 tpnt->st_ino = st.st_ino;
597 tpnt->ppnt = (ElfW(Phdr) *)(intptr_t) (tpnt->loadaddr + epnt->e_phoff);
598 tpnt->n_phent = epnt->e_phnum;
601 * Add this object into the symbol chain
604 (*rpnt)->next = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
605 _dl_memset((*rpnt)->next, 0, sizeof(struct dyn_elf));
606 (*rpnt)->next->prev = (*rpnt);
607 *rpnt = (*rpnt)->next;
609 tpnt->symbol_scope = _dl_symbol_tables;
612 tpnt->libtype = elf_lib;
615 * OK, the next thing we need to do is to insert the dynamic linker into
616 * the proper entry in the GOT so that the PLT symbols can be properly
620 lpnt = (unsigned long *) dynamic_info[DT_PLTGOT];
623 lpnt = (unsigned long *) (dynamic_info[DT_PLTGOT]);
624 INIT_GOT(lpnt, tpnt);
627 _dl_if_debug_dprint("\n\tfile='%s'; generating link map\n", libname);
628 _dl_if_debug_dprint("\t\tdynamic: %x base: %x\n", dynamic_addr, libaddr);
629 _dl_if_debug_dprint("\t\t entry: %x phdr: %x phnum: %x\n\n",
630 epnt->e_entry + libaddr, tpnt->ppnt, tpnt->n_phent);
632 _dl_munmap(header, _dl_pagesize);
637 /* now_flag must be RTLD_NOW or zero */
638 int _dl_fixup(struct dyn_elf *rpnt, int now_flag)
641 struct elf_resolve *tpnt;
642 ElfW(Word) reloc_size, relative_count;
643 ElfW(Addr) reloc_addr;
646 goof = _dl_fixup(rpnt->next, now_flag);
651 if (!(tpnt->init_flag & RELOCS_DONE))
652 _dl_if_debug_dprint("relocation processing: %s\n", tpnt->libname);
654 if (unlikely(tpnt->dynamic_info[UNSUPPORTED_RELOC_TYPE])) {
655 _dl_if_debug_dprint("%s: can't handle %s relocation records\n",
656 _dl_progname, UNSUPPORTED_RELOC_STR);
661 reloc_size = tpnt->dynamic_info[DT_RELOC_TABLE_SIZE];
662 /* On some machines, notably SPARC & PPC, DT_REL* includes DT_JMPREL in its
663 range. Note that according to the ELF spec, this is completely legal! */
664 #ifdef ELF_MACHINE_PLTREL_OVERLAP
665 reloc_size -= tpnt->dynamic_info [DT_PLTRELSZ];
667 if (tpnt->dynamic_info[DT_RELOC_TABLE_ADDR] &&
668 !(tpnt->init_flag & RELOCS_DONE)) {
669 reloc_addr = tpnt->dynamic_info[DT_RELOC_TABLE_ADDR];
670 relative_count = tpnt->dynamic_info[DT_RELCONT_IDX];
671 if (relative_count) { /* Optimize the XX_RELATIVE relocations if possible */
672 reloc_size -= relative_count * sizeof(ELF_RELOC);
673 elf_machine_relative(tpnt->loadaddr, reloc_addr, relative_count);
674 reloc_addr += relative_count * sizeof(ELF_RELOC);
676 goof += _dl_parse_relocation_information(rpnt,
679 tpnt->init_flag |= RELOCS_DONE;
681 if (tpnt->dynamic_info[DT_BIND_NOW])
683 if (tpnt->dynamic_info[DT_JMPREL] &&
684 (!(tpnt->init_flag & JMP_RELOCS_DONE) ||
685 (now_flag && !(tpnt->rtld_flags & now_flag)))) {
686 tpnt->rtld_flags |= now_flag;
687 if (!(tpnt->rtld_flags & RTLD_NOW)) {
688 _dl_parse_lazy_relocation_information(rpnt,
689 tpnt->dynamic_info[DT_JMPREL],
690 tpnt->dynamic_info [DT_PLTRELSZ]);
692 goof += _dl_parse_relocation_information(rpnt,
693 tpnt->dynamic_info[DT_JMPREL],
694 tpnt->dynamic_info[DT_PLTRELSZ]);
696 tpnt->init_flag |= JMP_RELOCS_DONE;
701 /* Minimal printf which handles only %s, %d, and %x */
702 void _dl_dprintf(int fd, const char *fmt, ...)
710 char *start, *ptr, *string;
716 buf = _dl_mmap((void *) 0, _dl_pagesize, PROT_READ | PROT_WRITE,
717 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
718 if (_dl_mmap_check_error(buf)) {
719 _dl_write(fd, "mmap of a spare page failed!\n", 29);
725 if (_dl_strlen(fmt) >= (_dl_pagesize - 1)) {
726 _dl_write(fd, "overflow\n", 11);
730 _dl_strcpy(buf, fmt);
734 while (*ptr != '%' && *ptr) {
740 _dl_write(fd, start, _dl_strlen(start));
744 string = va_arg(args, char *);
747 _dl_write(fd, "(null)", 6);
749 _dl_write(fd, string, _dl_strlen(string));
757 num = va_arg(args, long int);
759 num = va_arg(args, int);
761 string = _dl_simple_ltoa(tmp, num);
762 _dl_write(fd, string, _dl_strlen(string));
770 num = va_arg(args, long int);
772 num = va_arg(args, int);
774 string = _dl_simple_ltoahex(tmp, num);
775 _dl_write(fd, string, _dl_strlen(string));
779 _dl_write(fd, "(null)", 6);
785 _dl_write(fd, start, _dl_strlen(start));
789 _dl_munmap(buf, _dl_pagesize);
793 char *_dl_strdup(const char *string)
798 len = _dl_strlen(string);
799 retval = _dl_malloc(len + 1);
800 _dl_strcpy(retval, string);
804 void _dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[], void *debug_addr, ElfW(Addr) load_off)
806 __dl_parse_dynamic_info(dpnt, dynamic_info, debug_addr, load_off);
809 /* we want this in ldso.so and libdl.a but nowhere else */
811 #if defined IS_IN_rtld || (defined IS_IN_libdl && ! defined SHARED)
812 extern __typeof(dl_iterate_phdr) __dl_iterate_phdr;
814 __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, size_t size, void *data), void *data)
816 struct elf_resolve *l;
817 struct dl_phdr_info info;
820 for (l = _dl_loaded_modules; l != NULL; l = l->next) {
821 info.dlpi_addr = l->loadaddr;
822 info.dlpi_name = l->libname;
823 info.dlpi_phdr = l->ppnt;
824 info.dlpi_phnum = l->n_phent;
825 ret = callback (&info, sizeof (struct dl_phdr_info), data);
831 strong_alias(__dl_iterate_phdr, dl_iterate_phdr)