ldso/ldso/ldso.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Program to load an ELF binary on a linux system, and run it
   4  * after resolving ELF shared library symbols
   5  *
   6  * Copyright (C) 2005 by Joakim Tjernlund
   7  * Copyright (C) 2000-2006 by Erik Andersen <andersen@codepoet.org>
   8  * Copyright (c) 1994-2000 Eric Youngdale, Peter MacDonald,
   9  *                              David Engel, Hongjiu Lu and Mitch D'Souza
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. The name of the above contributors may not be
  17  *    used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "ldso.h"
  34 #include "unsecvars.h"
  35
  36 /* Pull in common debug code */
  37 #include "dl-debug.c"
  38
  39 #define ALLOW_ZERO_PLTGOT
  40
  41 #if USE_TLS
  42 #include "dl-tls.c"
  43 #endif
  44
  45 /* Pull in the value of _dl_progname */
  46 #include LDSO_ELFINTERP
  47
  48 /* Global variables used within the shared library loader */
  49 char *_dl_library_path         = NULL;  /* Where we look for libraries */
  50 char *_dl_preload              = NULL;  /* Things to be loaded before the libs */
  51 char *_dl_ldsopath             = NULL;  /* Location of the shared lib loader */
  52 int _dl_errno                  = 0;     /* We can't use the real errno in ldso */
  53 size_t _dl_pagesize            = 0;     /* Store the page size for use later */
  54 struct r_debug *_dl_debug_addr = NULL;  /* Used to communicate with the gdb debugger */
  55 void *(*_dl_malloc_function) (size_t size) = NULL;
  56 void (*_dl_free_function) (void *p) = NULL;
  57
  58 static int _dl_secure = 1; /* Are we dealing with setuid stuff? */
  59
  60 #ifdef __SUPPORT_LD_DEBUG__
  61 char *_dl_debug           = NULL;
  62 char *_dl_debug_symbols   = NULL;
  63 char *_dl_debug_move      = NULL;
  64 char *_dl_debug_reloc     = NULL;
  65 char *_dl_debug_detail    = NULL;
  66 char *_dl_debug_nofixups  = NULL;
  67 char *_dl_debug_bindings  = NULL;
  68 int   _dl_debug_file      = 2;
  69 #endif
  70
  71 /* Needed for standalone execution. */
  72 unsigned long attribute_hidden _dl_skip_args = 0;
  73 const char *_dl_progname = UCLIBC_LDSO;      /* The name of the executable being run */
  74 #include "dl-startup.c"
  75 #include "dl-symbols.c"
  76 #include "dl-array.c"
  77
  78 /*
  79  * This stub function is used by some debuggers.  The idea is that they
  80  * can set an internal breakpoint on it, so that we are notified when the
  81  * address mapping is changed in some way.
  82  */
  83 void _dl_debug_state(void);
  84 rtld_hidden_proto(_dl_debug_state, noinline);
  85 void _dl_debug_state(void)
  86 {
  87         /* Make sure GCC doesn't recognize this function as pure, to avoid
  88          * having the calls optimized away.
  89          */
  90         __asm__("");
  91 }
  92 rtld_hidden_def(_dl_debug_state);
  93
  94 static unsigned char *_dl_malloc_addr = NULL;   /* Lets _dl_malloc use the already allocated memory page */
  95 static unsigned char *_dl_mmap_zero   = NULL;   /* Also used by _dl_malloc */
  96
  97 static struct elf_resolve **init_fini_list;
  98 static unsigned int nlist; /* # items in init_fini_list */
  99 extern void _start(void);
 100
 101 #ifdef __UCLIBC_HAS_SSP__
 102 # include <dl-osinfo.h>
 103 uintptr_t stack_chk_guard;
 104 # ifndef THREAD_SET_STACK_GUARD
 105 /* Only exported for architectures that don't store the stack guard canary
 106  * in local thread area.  */
 107 uintptr_t __stack_chk_guard attribute_relro;
 108 #  ifdef __UCLIBC_HAS_SSP_COMPAT__
 109 strong_alias(__stack_chk_guard,__guard)
 110 #  endif
 111 # elif __UCLIBC_HAS_SSP_COMPAT__
 112 uintptr_t __guard attribute_relro;
 113 # endif
 114 #endif
 115
 116 char *_dl_getenv(const char *symbol, char **envp)
 117 {
 118         char *pnt;
 119         const char *pnt1;
 120
 121         while ((pnt = *envp++)) {
 122                 pnt1 = symbol;
 123                 while (*pnt && *pnt == *pnt1)
 124                         pnt1++, pnt++;
 125                 if (!*pnt || *pnt != '=' || *pnt1)
 126                         continue;
 127                 return pnt + 1;
 128         }
 129         return 0;
 130 }
 131
 132 void _dl_unsetenv(const char *symbol, char **envp)
 133 {
 134         char *pnt;
 135         const char *pnt1;
 136         char **newenvp = envp;
 137
 138         for (pnt = *envp; pnt; pnt = *++envp) {
 139                 pnt1 = symbol;
 140                 while (*pnt && *pnt == *pnt1)
 141                         pnt1++, pnt++;
 142                 if (!*pnt || *pnt != '=' || *pnt1)
 143                         *newenvp++ = *envp;
 144         }
 145         *newenvp++ = *envp;
 146         return;
 147 }
 148
 149 static int _dl_suid_ok(void)
 150 {
 151         __kernel_uid_t uid, euid;
 152         __kernel_gid_t gid, egid;
 153
 154         uid = _dl_getuid();
 155         euid = _dl_geteuid();
 156         gid = _dl_getgid();
 157         egid = _dl_getegid();
 158
 159         if (uid == euid && gid == egid) {
 160                 return 1;
 161         }
 162         return 0;
 163 }
 164
 165 void *_dl_malloc(size_t size)
 166 {
 167         void *retval;
 168
 169 #if 0
 170         _dl_debug_early("request for %d bytes\n", size);
 171 #endif
 172
 173         if (_dl_malloc_function)
 174                 return (*_dl_malloc_function) (size);
 175
 176         if (_dl_malloc_addr - _dl_mmap_zero + size > _dl_pagesize) {
 177                 size_t rounded_size;
 178
 179                 /* Since the above assumes we get a full page even if
 180                    we request less than that, make sure we request a
 181                    full page, since uClinux may give us less than than
 182                    a full page.  We might round even
 183                    larger-than-a-page sizes, but we end up never
 184                    reusing _dl_mmap_zero/_dl_malloc_addr in that case,
 185                    so we don't do it.
 186
 187                    The actual page size doesn't really matter; as long
 188                    as we're self-consistent here, we're safe.  */
 189                 if (size < _dl_pagesize)
 190                         rounded_size = (size + ADDR_ALIGN) & _dl_pagesize;
 191                 else
 192                         rounded_size = size;
 193
 194                 _dl_debug_early("mmapping more memory\n");
 195                 _dl_mmap_zero = _dl_malloc_addr = _dl_mmap((void *) 0, rounded_size,
 196                                 PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 197                 if (_dl_mmap_check_error(_dl_mmap_zero)) {
 198                         _dl_dprintf(_dl_debug_file, "%s: mmap of a spare page failed!\n", _dl_progname);
 199                         _dl_exit(20);
 200                 }
 201         }
 202         retval = _dl_malloc_addr;
 203         _dl_malloc_addr += size;
 204
 205         /*
 206          * Align memory to DL_MALLOC_ALIGN byte boundary.  Some
 207          * platforms require this, others simply get better
 208          * performance.
 209          */
 210         _dl_malloc_addr = (unsigned char *) (((unsigned long) _dl_malloc_addr + DL_MALLOC_ALIGN - 1) & ~(DL_MALLOC_ALIGN - 1));
 211         return retval;
 212 }
 213
 214 static void *_dl_zalloc(size_t size)
 215 {
 216         void *p = _dl_malloc(size);
 217         if (p)
 218                 _dl_memset(p, 0, size);
 219         return p;
 220 }
 221
 222 void _dl_free(void *p)
 223 {
 224         if (_dl_free_function)
 225                 (*_dl_free_function) (p);
 226 }
 227
 228 #if USE_TLS
 229 void *_dl_memalign(size_t __boundary, size_t __size)
 230 {
 231         void *result;
 232         int i = 0;
 233         size_t delta;
 234         size_t rounded = 0;
 235
 236         if (_dl_memalign_function)
 237                 return (*_dl_memalign_function) (__boundary, __size);
 238
 239         while (rounded < __boundary) {
 240                 rounded = (1 << i++);
 241         }
 242
 243         delta = (((size_t) _dl_malloc_addr + __size) & (rounded - 1));
 244
 245         if ((result = _dl_malloc(rounded - delta)) == NULL)
 246                 return result;
 247
 248         result = _dl_malloc(__size);
 249
 250         return result;
 251 }
 252 #endif
 253
 254 static void __attribute__ ((destructor)) __attribute_used__ _dl_fini(void)
 255 {
 256         unsigned int i;
 257         struct elf_resolve * tpnt;
 258
 259         for (i = 0; i < nlist; ++i) {
 260                 tpnt = init_fini_list[i];
 261                 if (tpnt->init_flag & FINI_FUNCS_CALLED)
 262                         continue;
 263                 tpnt->init_flag |= FINI_FUNCS_CALLED;
 264                 _dl_run_fini_array(tpnt);
 265                 if (tpnt->dynamic_info[DT_FINI]) {
 266                         void (*dl_elf_func) (void);
 267
 268                         dl_elf_func = (void (*)(void)) (intptr_t) DL_RELOC_ADDR(tpnt->loadaddr, tpnt->dynamic_info[DT_FINI]);
 269                         _dl_if_debug_dprint("\ncalling FINI: %s\n\n", tpnt->libname);
 270                         DL_CALL_FUNC_AT_ADDR (dl_elf_func, tpnt->loadaddr, (void(*)(void)));
 271                 }
 272         }
 273 }
 274
 275 void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
 276                           ElfW(auxv_t) auxvt[AT_EGID + 1], char **envp,
 277                           char **argv
 278                           DL_GET_READY_TO_RUN_EXTRA_PARMS)
 279 {
 280         ElfW(Addr) app_mapaddr = 0;
 281         ElfW(Phdr) *ppnt;
 282         ElfW(Dyn) *dpnt;
 283         char *lpntstr;
 284         unsigned int i;
 285         int unlazy = 0, trace_loaded_objects = 0;
 286         struct dyn_elf *rpnt;
 287         struct elf_resolve *tcurr;
 288         struct elf_resolve *tpnt1;
 289         struct elf_resolve app_tpnt_tmp;
 290         struct elf_resolve *app_tpnt = &app_tpnt_tmp;
 291         struct r_debug *debug_addr;
 292         unsigned long *lpnt;
 293         unsigned long *_dl_envp;                /* The environment address */
 294         ElfW(Addr) relro_addr = 0;
 295         size_t relro_size = 0;
 296         struct stat st;
 297 #if USE_TLS
 298         void *tcbp = NULL;
 299 #endif
 300
 301         /* Wahoo!!! We managed to make a function call!  Get malloc
 302          * setup so we can use _dl_dprintf() to print debug noise
 303          * instead of the SEND_STDERR macros used in dl-startup.c */
 304
 305         _dl_memset(app_tpnt, 0, sizeof(*app_tpnt));
 306
 307         /* Store the page size for later use */
 308         _dl_pagesize = (auxvt[AT_PAGESZ].a_un.a_val) ? (size_t) auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
 309         /* Make it so _dl_malloc can use the page of memory we have already
 310          * allocated.  We shouldn't need to grab any more memory.  This must
 311          * be first since things like _dl_dprintf() use _dl_malloc()...
 312          */
 313         _dl_malloc_addr = (unsigned char *)_dl_pagesize;
 314         _dl_mmap_zero = 0;
 315
 316         /* Wahoo!!! */
 317         _dl_debug_early("Cool, ldso survived making function calls\n");
 318
 319         /* Now we have done the mandatory linking of some things.  We are now
 320          * free to start using global variables, since these things have all
 321          * been fixed up by now.  Still no function calls outside of this
 322          * library, since the dynamic resolver is not yet ready.
 323          */
 324         if (argv[0]) {
 325                 _dl_progname = argv[0];
 326         }
 327
 328         if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val) {
 329                 _dl_dprintf(_dl_debug_file, "Standalone execution is not supported yet\n");
 330                 _dl_exit(1);
 331         }
 332
 333         /* Start to build the tables of the modules that are required for
 334          * this beast to run.  We start with the basic executable, and then
 335          * go from there.  Eventually we will run across ourself, and we
 336          * will need to properly deal with that as well.
 337          */
 338         rpnt = NULL;
 339         if (_dl_getenv("LD_BIND_NOW", envp))
 340                 unlazy = RTLD_NOW;
 341
 342         /* Now we need to figure out what kind of options are selected.
 343          * Note that for SUID programs we ignore the settings in
 344          * LD_LIBRARY_PATH.
 345          */
 346         if ((auxvt[AT_UID].a_un.a_val == (size_t)-1 && _dl_suid_ok()) ||
 347             (auxvt[AT_UID].a_un.a_val != (size_t)-1 &&
 348              auxvt[AT_UID].a_un.a_val == auxvt[AT_EUID].a_un.a_val &&
 349              auxvt[AT_GID].a_un.a_val == auxvt[AT_EGID].a_un.a_val)) {
 350                 _dl_secure = 0;
 351                 _dl_preload = _dl_getenv("LD_PRELOAD", envp);
 352                 _dl_library_path = _dl_getenv("LD_LIBRARY_PATH", envp);
 353         } else {
 354                 static const char unsecure_envvars[] =
 355 #ifdef EXTRA_UNSECURE_ENVVARS
 356                         EXTRA_UNSECURE_ENVVARS
 357 #endif
 358                         UNSECURE_ENVVARS;
 359                 const char *nextp;
 360                 _dl_secure = 1;
 361
 362                 nextp = unsecure_envvars;
 363                 do {
 364                         _dl_unsetenv (nextp, envp);
 365                         /* We could use rawmemchr but this need not be fast.  */
 366                         nextp = _dl_strchr(nextp, '\0') + 1;
 367                 } while (*nextp != '\0');
 368                 _dl_preload = NULL;
 369                 _dl_library_path = NULL;
 370                 /* SUID binaries can be exploited if they do LAZY relocation. */
 371                 unlazy = RTLD_NOW;
 372         }
 373
 374 #if USE_TLS
 375         _dl_error_catch_tsd = &_dl_initial_error_catch_tsd;
 376         _dl_init_static_tls = &_dl_nothread_init_static_tls;
 377 #endif
 378
 379 #ifdef __UCLIBC_HAS_SSP__
 380         /* Set up the stack checker's canary.  */
 381         stack_chk_guard = _dl_setup_stack_chk_guard ();
 382 # ifdef THREAD_SET_STACK_GUARD
 383         THREAD_SET_STACK_GUARD (stack_chk_guard);
 384 #  ifdef __UCLIBC_HAS_SSP_COMPAT__
 385         __guard = stack_chk_guard;
 386 #  endif
 387 # else
 388         __stack_chk_guard = stack_chk_guard;
 389 # endif
 390 #endif
 391
 392         /* At this point we are now free to examine the user application,
 393          * and figure out which libraries are supposed to be called.  Until
 394          * we have this list, we will not be completely ready for dynamic
 395          * linking.
 396          */
 397
 398         /* Find the runtime load address of the main executable.  This may be
 399          * different from what the ELF header says for ET_DYN/PIE executables.
 400          */
 401         {
 402                 unsigned int idx;
 403                 ElfW(Phdr) *phdr = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
 404
 405                 for (idx = 0; idx < auxvt[AT_PHNUM].a_un.a_val; idx++, phdr++)
 406                         if (phdr->p_type == PT_PHDR) {
 407                                 DL_INIT_LOADADDR_PROG(app_tpnt->loadaddr, auxvt[AT_PHDR].a_un.a_val - phdr->p_vaddr);
 408                                 break;
 409                         }
 410
 411                 if (DL_LOADADDR_BASE(app_tpnt->loadaddr))
 412                         _dl_debug_early("Position Independent Executable: "
 413                                         "app_tpnt->loadaddr=%x\n", DL_LOADADDR_BASE(app_tpnt->loadaddr));
 414         }
 415
 416         /*
 417          * This is used by gdb to locate the chain of shared libraries that are
 418          * currently loaded.
 419          */
 420         debug_addr = _dl_zalloc(sizeof(struct r_debug));
 421
 422         ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
 423         for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
 424                 if (ppnt->p_type == PT_GNU_RELRO) {
 425                         relro_addr = ppnt->p_vaddr;
 426                         relro_size = ppnt->p_memsz;
 427                 }
 428                 if (!app_mapaddr && (ppnt->p_type == PT_LOAD)) {
 429                         app_mapaddr = DL_RELOC_ADDR (app_tpnt->loadaddr, ppnt->p_vaddr);
 430                 }
 431                 if (ppnt->p_type == PT_DYNAMIC) {
 432                         dpnt = (ElfW(Dyn) *) DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr);
 433                         _dl_parse_dynamic_info(dpnt, app_tpnt->dynamic_info, debug_addr, app_tpnt->loadaddr);
 434 #ifndef __FORCE_SHAREABLE_TEXT_SEGMENTS__
 435                         /* Ugly, ugly.  We need to call mprotect to change the
 436                          * protection of the text pages so that we can do the
 437                          * dynamic linking.  We can set the protection back
 438                          * again once we are done.
 439                          */
 440                         _dl_debug_early("calling mprotect on the application program\n");
 441                         /* Now cover the application program. */
 442                         if (app_tpnt->dynamic_info[DT_TEXTREL]) {
 443                                 ElfW(Phdr) *ppnt_outer = ppnt;
 444                                 ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
 445                                 for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
 446                                         if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
 447                                                 _dl_mprotect((void *) (DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr) & PAGE_ALIGN),
 448                                                              (DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr) & ADDR_ALIGN) +
 449                                                              (unsigned long) ppnt->p_filesz,
 450                                                              PROT_READ | PROT_WRITE | PROT_EXEC);
 451                                 }
 452                                 ppnt = ppnt_outer;
 453                         }
 454 #else
 455                         if (app_tpnt->dynamic_info[DT_TEXTREL]) {
 456                                 _dl_dprintf(_dl_debug_file, "Can't modify application's text section; use the GCC option -fPIE for position-independent executables.\n");
 457                                 _dl_exit(1);
 458                         }
 459 #endif
 460
 461 #ifndef ALLOW_ZERO_PLTGOT
 462                         /* make sure it's really there. */
 463                         if (app_tpnt->dynamic_info[DT_PLTGOT] == 0)
 464                                 continue;
 465 #endif
 466                         /* OK, we have what we need - slip this one into the list. */
 467                         app_tpnt = _dl_add_elf_hash_table(_dl_progname, app_tpnt->loadaddr,
 468                                         app_tpnt->dynamic_info,
 469                                         (unsigned long) DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr),
 470                                         ppnt->p_filesz);
 471                         _dl_loaded_modules->libtype = elf_executable;
 472                         _dl_loaded_modules->ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
 473                         _dl_loaded_modules->n_phent = auxvt[AT_PHNUM].a_un.a_val;
 474                         _dl_symbol_tables = rpnt = _dl_zalloc(sizeof(struct dyn_elf));
 475                         rpnt->dyn = _dl_loaded_modules;
 476                         app_tpnt->mapaddr = app_mapaddr;
 477                         app_tpnt->rtld_flags = unlazy | RTLD_GLOBAL;
 478                         app_tpnt->usage_count++;
 479                         app_tpnt->symbol_scope = _dl_symbol_tables;
 480                         lpnt = (unsigned long *) (app_tpnt->dynamic_info[DT_PLTGOT]);
 481 #ifdef ALLOW_ZERO_PLTGOT
 482                         if (lpnt)
 483 #endif
 484                                 INIT_GOT(lpnt, _dl_loaded_modules);
 485                 }
 486
 487                 /* OK, fill this in - we did not have this before */
 488                 if (ppnt->p_type == PT_INTERP) {
 489                         char *ptmp;
 490
 491                         tpnt->libname = (char *) DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr);
 492
 493 #ifdef __LDSO_SEARCH_INTERP_PATH__
 494                         /* Store the path where the shared lib loader was found
 495                          * for later use
 496                          */
 497                         _dl_ldsopath = _dl_strdup(tpnt->libname);
 498                         ptmp = _dl_strrchr(_dl_ldsopath, '/');
 499                         if (ptmp != _dl_ldsopath)
 500                                 *ptmp = '\0';
 501
 502                         _dl_debug_early("Lib Loader: (%x) %s\n", (unsigned) DL_LOADADDR_BASE(tpnt->loadaddr), tpnt->libname);
 503 #endif
 504                 }
 505
 506                 /* Discover any TLS sections if the target supports them. */
 507                 if (ppnt->p_type == PT_TLS) {
 508 #if USE_TLS
 509                         if (ppnt->p_memsz > 0) {
 510                                 app_tpnt->l_tls_blocksize = ppnt->p_memsz;
 511                                 app_tpnt->l_tls_align = ppnt->p_align;
 512                                 if (ppnt->p_align == 0)
 513                                         app_tpnt->l_tls_firstbyte_offset = 0;
 514                                 else
 515                                         app_tpnt->l_tls_firstbyte_offset =
 516                                                 (ppnt->p_vaddr & (ppnt->p_align - 1));
 517                                 app_tpnt->l_tls_initimage_size = ppnt->p_filesz;
 518                                 app_tpnt->l_tls_initimage = (void *) ppnt->p_vaddr;
 519
 520                                 /* This image gets the ID one.  */
 521                                 _dl_tls_max_dtv_idx = app_tpnt->l_tls_modid = 1;
 522
 523                         }
 524                         _dl_debug_early("Found TLS header for appplication program\n");
 525                         break;
 526 #else
 527                         _dl_dprintf(_dl_debug_file, "Program uses unsupported TLS data!\n");
 528                         _dl_exit(1);
 529 #endif
 530                 }
 531         }
 532         app_tpnt->relro_addr = relro_addr;
 533         app_tpnt->relro_size = relro_size;
 534
 535 #if USE_TLS
 536         /*
 537          * Adjust the address of the TLS initialization image in
 538          * case the executable is actually an ET_DYN object.
 539          */
 540         if (app_tpnt->l_tls_initimage != NULL) {
 541                 app_tpnt->l_tls_initimage =
 542                         (char *) app_tpnt->l_tls_initimage + app_tpnt->loadaddr;
 543                 _dl_debug_early("Relocated TLS initial image from %x to %x (size = %x)\n",
 544                         (unsigned int)app_tpnt->l_tls_initimage,
 545                         app_tpnt->l_tls_initimage, app_tpnt->l_tls_initimage_size);
 546         }
 547 #endif
 548
 549 #ifdef __SUPPORT_LD_DEBUG__
 550         _dl_debug = _dl_getenv("LD_DEBUG", envp);
 551         if (_dl_debug) {
 552                 if (_dl_strstr(_dl_debug, "all")) {
 553                         _dl_debug_detail = _dl_debug_move = _dl_debug_symbols
 554                                 = _dl_debug_reloc = _dl_debug_bindings = _dl_debug_nofixups = (void*)1;
 555                 } else {
 556                         _dl_debug_detail   = _dl_strstr(_dl_debug, "detail");
 557                         _dl_debug_move     = _dl_strstr(_dl_debug, "move");
 558                         _dl_debug_symbols  = _dl_strstr(_dl_debug, "sym");
 559                         _dl_debug_reloc    = _dl_strstr(_dl_debug, "reloc");
 560                         _dl_debug_nofixups = _dl_strstr(_dl_debug, "nofix");
 561                         _dl_debug_bindings = _dl_strstr(_dl_debug, "bind");
 562                 }
 563         }
 564
 565         {
 566                 const char *dl_debug_output;
 567
 568                 dl_debug_output = _dl_getenv("LD_DEBUG_OUTPUT", envp);
 569
 570                 if (dl_debug_output) {
 571                         char tmp[22], *tmp1, *filename;
 572                         int len1, len2;
 573
 574                         _dl_memset(tmp, 0, sizeof(tmp));
 575                         tmp1 = _dl_simple_ltoa( tmp, (unsigned long)_dl_getpid());
 576
 577                         len1 = _dl_strlen(dl_debug_output);
 578                         len2 = _dl_strlen(tmp1);
 579
 580                         filename = _dl_malloc(len1 + len2 + 2);
 581
 582                         if (filename) {
 583                                 _dl_strcpy (filename, dl_debug_output);
 584                                 filename[len1] = '.';
 585                                 _dl_strcpy (&filename[len1+1], tmp1);
 586
 587                                 _dl_debug_file = _dl_open(filename, O_WRONLY|O_CREAT, 0644);
 588                                 if (_dl_debug_file < 0) {
 589                                         _dl_debug_file = 2;
 590                                         _dl_dprintf(_dl_debug_file, "can't open file: '%s'\n",filename);
 591                                 }
 592                         }
 593                 }
 594         }
 595 #endif
 596
 597         if (_dl_getenv("LD_TRACE_LOADED_OBJECTS", envp) != NULL) {
 598                 trace_loaded_objects++;
 599         }
 600
 601 #ifndef __LDSO_LDD_SUPPORT__
 602         if (trace_loaded_objects) {
 603                 _dl_dprintf(_dl_debug_file, "Use the ldd provided by uClibc\n");
 604                 _dl_exit(1);
 605         }
 606 #endif
 607
 608         /*
 609          * OK, fix one more thing - set up debug_addr so it will point
 610          * to our chain.  Later we may need to fill in more fields, but this
 611          * should be enough for now.
 612          */
 613         debug_addr->r_map = (struct link_map *) _dl_loaded_modules;
 614         debug_addr->r_version = 1;
 615         debug_addr->r_ldbase = (ElfW(Addr)) DL_LOADADDR_BASE(load_addr);
 616         debug_addr->r_brk = (unsigned long) &_dl_debug_state;
 617         _dl_debug_addr = debug_addr;
 618
 619         /* Do not notify the debugger until the interpreter is in the list */
 620
 621         /* OK, we now have the application in the list, and we have some
 622          * basic stuff in place.  Now search through the list for other shared
 623          * libraries that should be loaded, and insert them on the list in the
 624          * correct order.
 625          */
 626
 627         _dl_map_cache();
 628
 629         if (_dl_preload) {
 630                 char c, *str, *str2;
 631
 632                 str = _dl_preload;
 633                 while (*str == ':' || *str == ' ' || *str == '\t')
 634                         str++;
 635
 636                 while (*str) {
 637                         str2 = str;
 638                         while (*str2 && *str2 != ':' && *str2 != ' ' && *str2 != '\t')
 639                                 str2++;
 640                         c = *str2;
 641                         *str2 = '\0';
 642
 643                         if (!_dl_secure || _dl_strchr(str, '/') == NULL) {
 644                                 _dl_if_debug_dprint("\tfile='%s';  needed by '%s'\n", str, _dl_progname);
 645
 646                                 tpnt1 = _dl_load_shared_library(_dl_secure, &rpnt, NULL, str, trace_loaded_objects);
 647                                 if (!tpnt1) {
 648 #ifdef __LDSO_LDD_SUPPORT__
 649                                         if (trace_loaded_objects)
 650                                                 _dl_dprintf(1, "\t%s => not found\n", str);
 651                                         else
 652 #endif
 653                                         {
 654                                                 _dl_dprintf(_dl_debug_file, "%s: can't load " "library '%s'\n", _dl_progname, str);
 655                                                 _dl_exit(15);
 656                                         }
 657                                 } else {
 658                                         tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
 659
 660                                         _dl_debug_early("Loading: (%x) %s\n", DL_LOADADDR_BASE(tpnt1->loadaddr), tpnt1->libname);
 661
 662 #ifdef __LDSO_LDD_SUPPORT__
 663                                         if (trace_loaded_objects &&
 664                                             tpnt1->usage_count == 1) {
 665                                                 /* This is a real hack to make
 666                                                  * ldd not print the library
 667                                                  * itself when run on a
 668                                                  * library.
 669                                                  */
 670                                                 if (_dl_strcmp(_dl_progname, str) != 0)
 671                                                         _dl_dprintf(1, "\t%s => %s (%x)\n", str, tpnt1->libname,
 672                                                                     DL_LOADADDR_BASE(tpnt1->loadaddr));
 673                                         }
 674 #endif
 675                                 }
 676                         }
 677
 678                         *str2 = c;
 679                         str = str2;
 680                         while (*str == ':' || *str == ' ' || *str == '\t')
 681                                 str++;
 682                 }
 683         }
 684
 685 #ifdef __LDSO_PRELOAD_FILE_SUPPORT__
 686         do {
 687                 struct stat st;
 688                 char *preload;
 689                 int fd;
 690                 char c, *cp, *cp2;
 691
 692                 if (_dl_stat(LDSO_PRELOAD, &st) || st.st_size == 0) {
 693                         break;
 694                 }
 695
 696                 if ((fd = _dl_open(LDSO_PRELOAD, O_RDONLY, 0)) < 0) {
 697                         _dl_dprintf(_dl_debug_file, "%s: can't open file '%s'\n",
 698                                     _dl_progname, LDSO_PRELOAD);
 699                         break;
 700                 }
 701
 702                 preload = (caddr_t) _dl_mmap(0, st.st_size + 1,
 703                                              PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
 704                 _dl_close(fd);
 705                 if (preload == (caddr_t) -1) {
 706                         _dl_dprintf(_dl_debug_file, "%s:%i: can't map '%s'\n",
 707                                     _dl_progname, __LINE__, LDSO_PRELOAD);
 708                         break;
 709                 }
 710
 711                 /* convert all separators and comments to spaces */
 712                 for (cp = preload; *cp; /*nada */ ) {
 713                         if (*cp == ':' || *cp == '\t' || *cp == '\n') {
 714                                 *cp++ = ' ';
 715                         } else if (*cp == '#') {
 716                                 do {
 717                                         *cp++ = ' ';
 718                                 } while (*cp != '\n' && *cp != '\0');
 719                         } else {
 720                                 cp++;
 721                         }
 722                 }
 723
 724                 /* find start of first library */
 725                 for (cp = preload; *cp && *cp == ' '; cp++)
 726                         /*nada */ ;
 727
 728                 while (*cp) {
 729                         /* find end of library */
 730                         for (cp2 = cp; *cp && *cp != ' '; cp++)
 731                                 /*nada */ ;
 732                         c = *cp;
 733                         *cp = '\0';
 734
 735                         _dl_if_debug_dprint("\tfile='%s';  needed by '%s'\n", cp2, _dl_progname);
 736
 737                         tpnt1 = _dl_load_shared_library(0, &rpnt, NULL, cp2, trace_loaded_objects);
 738                         if (!tpnt1) {
 739 #ifdef __LDSO_LDD_SUPPORT__
 740                                 if (trace_loaded_objects)
 741                                         _dl_dprintf(1, "\t%s => not found\n", cp2);
 742                                 else
 743 #endif
 744                                 {
 745                                         _dl_dprintf(_dl_debug_file, "%s: can't load library '%s'\n", _dl_progname, cp2);
 746                                         _dl_exit(15);
 747                                 }
 748                         } else {
 749                                 tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
 750
 751                                 _dl_debug_early("Loading: (%x) %s\n", DL_LOADADDR_BASE(tpnt1->loadaddr), tpnt1->libname);
 752
 753 #ifdef __LDSO_LDD_SUPPORT__
 754                                 if (trace_loaded_objects &&
 755                                     tpnt1->usage_count == 1) {
 756                                         _dl_dprintf(1, "\t%s => %s (%x)\n",
 757                                                     cp2, tpnt1->libname,
 758                                                     DL_LOADADDR_BASE(tpnt1->loadaddr));
 759                                 }
 760 #endif
 761                         }
 762
 763                         /* find start of next library */
 764                         *cp = c;
 765                         for ( /*nada */ ; *cp && *cp == ' '; cp++)
 766                                 /*nada */ ;
 767                 }
 768
 769                 _dl_munmap(preload, st.st_size + 1);
 770         } while (0);
 771 #endif /* __LDSO_PRELOAD_FILE_SUPPORT__ */
 772
 773         nlist = 0;
 774         for (tcurr = _dl_loaded_modules; tcurr; tcurr = tcurr->next) {
 775                 ElfW(Dyn) *this_dpnt;
 776
 777                 nlist++;
 778                 for (this_dpnt = (ElfW(Dyn) *) tcurr->dynamic_addr; this_dpnt->d_tag; this_dpnt++) {
 779                         if (this_dpnt->d_tag == DT_NEEDED) {
 780                                 char *name;
 781                                 struct init_fini_list *tmp;
 782
 783                                 lpntstr = (char*) (tcurr->dynamic_info[DT_STRTAB] + this_dpnt->d_un.d_val);
 784                                 name = _dl_get_last_path_component(lpntstr);
 785                                 if (_dl_strcmp(name, UCLIBC_LDSO) == 0)
 786                                         continue;
 787
 788                                 _dl_if_debug_dprint("\tfile='%s';  needed by '%s'\n", lpntstr, _dl_progname);
 789
 790                                 if (!(tpnt1 = _dl_load_shared_library(0, &rpnt, tcurr, lpntstr, trace_loaded_objects))) {
 791 #ifdef __LDSO_LDD_SUPPORT__
 792                                         if (trace_loaded_objects) {
 793                                                 _dl_dprintf(1, "\t%s => not found\n", lpntstr);
 794                                                 continue;
 795                                         } else
 796 #endif
 797                                         {
 798                                                 _dl_dprintf(_dl_debug_file, "%s: can't load library '%s'\n", _dl_progname, lpntstr);
 799                                                 _dl_exit(16);
 800                                         }
 801                                 }
 802
 803                                 tmp = alloca(sizeof(struct init_fini_list)); /* Allocates on stack, no need to free this memory */
 804                                 tmp->tpnt = tpnt1;
 805                                 tmp->next = tcurr->init_fini;
 806                                 tcurr->init_fini = tmp;
 807
 808                                 tpnt1->rtld_flags = unlazy | RTLD_GLOBAL;
 809
 810                                 _dl_debug_early("Loading: (%x) %s\n", DL_LOADADDR_BASE(tpnt1->loadaddr), tpnt1->libname);
 811
 812 #ifdef __LDSO_LDD_SUPPORT__
 813                                 if (trace_loaded_objects &&
 814                                     tpnt1->usage_count == 1) {
 815                                         _dl_dprintf(1, "\t%s => %s (%x)\n",
 816                                                     lpntstr, tpnt1->libname,
 817                                                     DL_LOADADDR_BASE(tpnt1->loadaddr));
 818                                 }
 819 #endif
 820                         }
 821                 }
 822         }
 823         _dl_unmap_cache();
 824
 825         --nlist; /* Exclude the application. */
 826         init_fini_list = _dl_malloc(nlist * sizeof(struct elf_resolve *));
 827         i = 0;
 828         for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
 829                 init_fini_list[i++] = tcurr;
 830         }
 831
 832         /* Sort the INIT/FINI list in dependency order. */
 833         for (tcurr = _dl_loaded_modules->next; tcurr; tcurr = tcurr->next) {
 834                 unsigned int j, k;
 835
 836                 for (j = 0; init_fini_list[j] != tcurr; ++j)
 837                         /* Empty */;
 838                 for (k = j + 1; k < nlist; ++k) {
 839                         struct init_fini_list *runp = init_fini_list[k]->init_fini;
 840
 841                         for (; runp; runp = runp->next) {
 842                                 if (runp->tpnt == tcurr) {
 843                                         struct elf_resolve *here = init_fini_list[k];
 844                                         _dl_if_debug_dprint("Move %s from pos %d to %d in INIT/FINI list\n", here->libname, k, j);
 845                                         for (i = (k - j); i; --i)
 846                                                 init_fini_list[i+j] = init_fini_list[i+j-1];
 847                                         init_fini_list[j] = here;
 848                                         ++j;
 849                                         break;
 850                                 }
 851                         }
 852                 }
 853         }
 854 #ifdef __SUPPORT_LD_DEBUG__
 855         if (_dl_debug) {
 856                 _dl_dprintf(_dl_debug_file, "\nINIT/FINI order and dependencies:\n");
 857                 for (i = 0; i < nlist; i++) {
 858                         struct init_fini_list *tmp;
 859
 860                         _dl_dprintf(_dl_debug_file, "lib: %s has deps:\n",
 861                                     init_fini_list[i]->libname);
 862                         tmp = init_fini_list[i]->init_fini;
 863                         for (; tmp; tmp = tmp->next)
 864                                 _dl_dprintf(_dl_debug_file, " %s ", tmp->tpnt->libname);
 865                         _dl_dprintf(_dl_debug_file, "\n");
 866                 }
 867         }
 868 #endif
 869
 870         /*
 871          * If the program interpreter is not in the module chain, add it.
 872          * This will be required for dlopen to be able to access the internal
 873          * functions in the dynamic linker and to relocate the interpreter
 874          * again once all libs are loaded.
 875          */
 876         if (tpnt) {
 877                 ElfW(Ehdr) *epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_val;
 878                 ElfW(Phdr) *myppnt = (ElfW(Phdr) *) DL_RELOC_ADDR(load_addr, epnt->e_phoff);
 879                 int j;
 880
 881                 tpnt = _dl_add_elf_hash_table(tpnt->libname, load_addr,
 882                                               tpnt->dynamic_info,
 883                                               (unsigned long)tpnt->dynamic_addr,
 884                                               0);
 885
 886                 if (_dl_stat(tpnt->libname, &st) >= 0) {
 887                         tpnt->st_dev = st.st_dev;
 888                         tpnt->st_ino = st.st_ino;
 889                 }
 890                 tpnt->n_phent = epnt->e_phnum;
 891                 tpnt->ppnt = myppnt;
 892                 for (j = 0; j < epnt->e_phnum; j++, myppnt++) {
 893                         if (myppnt->p_type ==  PT_GNU_RELRO) {
 894                                 tpnt->relro_addr = myppnt->p_vaddr;
 895                                 tpnt->relro_size = myppnt->p_memsz;
 896                                 break;
 897                         }
 898                 }
 899                 tpnt->libtype = program_interpreter;
 900                 tpnt->usage_count++;
 901                 tpnt->symbol_scope = _dl_symbol_tables;
 902                 if (rpnt) {
 903                         rpnt->next = _dl_zalloc(sizeof(struct dyn_elf));
 904                         rpnt->next->prev = rpnt;
 905                         rpnt = rpnt->next;
 906                 } else {
 907                         rpnt = _dl_zalloc(sizeof(struct dyn_elf));
 908                 }
 909                 rpnt->dyn = tpnt;
 910                 tpnt->rtld_flags = RTLD_NOW | RTLD_GLOBAL; /* Must not be LAZY */
 911 #ifdef RERELOCATE_LDSO
 912                 /* Only rerelocate functions for now. */
 913                 tpnt->init_flag = RELOCS_DONE;
 914                 lpnt = (unsigned long *) (tpnt->dynamic_info[DT_PLTGOT]);
 915 # ifdef ALLOW_ZERO_PLTGOT
 916                 if (tpnt->dynamic_info[DT_PLTGOT])
 917 # endif
 918                         INIT_GOT(lpnt, tpnt);
 919 #else
 920                 tpnt->init_flag = RELOCS_DONE | JMP_RELOCS_DONE;
 921 #endif
 922                 tpnt = NULL;
 923         }
 924
 925 #ifdef __LDSO_LDD_SUPPORT__
 926         /* End of the line for ldd.... */
 927         if (trace_loaded_objects) {
 928                 _dl_dprintf(1, "\t%s => %s (%x)\n",
 929                             rpnt->dyn->libname + _dl_strlen(_dl_ldsopath) + 1,
 930                             rpnt->dyn->libname, DL_LOADADDR_BASE(rpnt->dyn->loadaddr));
 931                 _dl_exit(0);
 932         }
 933 #endif
 934
 935 #if USE_TLS
 936         /* We do not initialize any of the TLS functionality unless any of the
 937          * initial modules uses TLS.  This makes dynamic loading of modules with
 938          * TLS impossible, but to support it requires either eagerly doing setup
 939          * now or lazily doing it later.  Doing it now makes us incompatible with
 940          * an old kernel that can't perform TLS_INIT_TP, even if no TLS is ever
 941          * used.  Trying to do it lazily is too hairy to try when there could be
 942          * multiple threads (from a non-TLS-using libpthread).  */
 943         bool was_tls_init_tp_called = tls_init_tp_called;
 944         if (tcbp == NULL) {
 945                 _dl_debug_early("Calling init_tls()!\n");
 946                 tcbp = init_tls ();
 947         }
 948 #endif
 949
 950         _dl_debug_early("Beginning relocation fixups\n");
 951
 952 #ifdef __mips__
 953         /*
 954          * Relocation of the GOT entries for MIPS have to be done
 955          * after all the libraries have been loaded.
 956          */
 957         _dl_perform_mips_global_got_relocations(_dl_loaded_modules, !unlazy);
 958 #endif
 959
 960         /*
 961          * OK, now all of the kids are tucked into bed in their proper
 962          * addresses.  Now we go through and look for REL and RELA records that
 963          * indicate fixups to the GOT tables.  We need to do this in reverse
 964          * order so that COPY directives work correctly.
 965          */
 966         if (_dl_symbol_tables)
 967                 if (_dl_fixup(_dl_symbol_tables, unlazy))
 968                         _dl_exit(-1);
 969
 970         for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
 971                 if (tpnt->relro_size)
 972                         _dl_protect_relro (tpnt);
 973         }
 974
 975 #if USE_TLS
 976         if (!was_tls_init_tp_called && _dl_tls_max_dtv_idx > 0)
 977                 ++_dl_tls_generation;
 978
 979         _dl_debug_early("Calling _dl_allocate_tls_init()!\n");
 980
 981         /* Now that we have completed relocation, the initializer data
 982            for the TLS blocks has its final values and we can copy them
 983            into the main thread's TLS area, which we allocated above.  */
 984         _dl_allocate_tls_init (tcbp);
 985
 986         /* And finally install it for the main thread.  If ld.so itself uses
 987            TLS we know the thread pointer was initialized earlier.  */
 988         if (! tls_init_tp_called) {
 989                 const char *lossage = (char *) TLS_INIT_TP (tcbp, USE___THREAD);
 990                 if (__builtin_expect (lossage != NULL, 0)) {
 991                         _dl_debug_early("cannot set up thread-local storage: %s\n", lossage);
 992                         _dl_exit(30);
 993                 }
 994         }
 995 #endif /* USE_TLS */
 996
 997         /* OK, at this point things are pretty much ready to run.  Now we need
 998          * to touch up a few items that are required, and then we can let the
 999          * user application have at it.  Note that the dynamic linker itself
1000          * is not guaranteed to be fully dynamicly linked if we are using
1001          * ld.so.1, so we have to look up each symbol individually.
1002          */
1003
1004         _dl_envp = (unsigned long *) (intptr_t) _dl_find_hash(__C_SYMBOL_PREFIX__ "__environ", _dl_symbol_tables, NULL, 0, NULL);
1005         if (_dl_envp)
1006                 *_dl_envp = (unsigned long) envp;
1007
1008 #ifndef __FORCE_SHAREABLE_TEXT_SEGMENTS__
1009         {
1010                 unsigned int j;
1011                 ElfW(Phdr) *myppnt;
1012
1013                 /* We had to set the protections of all pages to R/W for
1014                  * dynamic linking.  Set text pages back to R/O.
1015                  */
1016                 for (tpnt = _dl_loaded_modules; tpnt; tpnt = tpnt->next) {
1017                         for (myppnt = tpnt->ppnt, j = 0; j < tpnt->n_phent; j++, myppnt++) {
1018                                 if (myppnt->p_type == PT_LOAD && !(myppnt->p_flags & PF_W) && tpnt->dynamic_info[DT_TEXTREL]) {
1019                                         _dl_mprotect((void *) (DL_RELOC_ADDR(tpnt->loadaddr, myppnt->p_vaddr) & PAGE_ALIGN),
1020                                                         (myppnt->p_vaddr & ADDR_ALIGN) + (unsigned long) myppnt->p_filesz, LXFLAGS(myppnt->p_flags));
1021                                 }
1022                         }
1023                 }
1024
1025         }
1026 #endif
1027         /* Notify the debugger we have added some objects. */
1028         _dl_debug_addr->r_state = RT_ADD;
1029         _dl_debug_state();
1030
1031         /* Run pre-initialization functions for the executable.  */
1032         _dl_run_array_forward(_dl_loaded_modules->dynamic_info[DT_PREINIT_ARRAY],
1033                               _dl_loaded_modules->dynamic_info[DT_PREINIT_ARRAYSZ],
1034                               _dl_loaded_modules->loadaddr);
1035
1036         /* Run initialization functions for loaded objects.  For the
1037            main executable, they will be run from __uClibc_main.  */
1038         for (i = nlist; i; --i) {
1039                 tpnt = init_fini_list[i-1];
1040                 tpnt->init_fini = NULL; /* Clear, since alloca was used */
1041                 if (tpnt->init_flag & INIT_FUNCS_CALLED)
1042                         continue;
1043                 tpnt->init_flag |= INIT_FUNCS_CALLED;
1044
1045                 if (tpnt->dynamic_info[DT_INIT]) {
1046                         void (*dl_elf_func) (void);
1047
1048                         dl_elf_func = (void (*)(void)) DL_RELOC_ADDR(tpnt->loadaddr, tpnt->dynamic_info[DT_INIT]);
1049
1050                         _dl_if_debug_dprint("calling INIT: %s\n\n", tpnt->libname);
1051
1052                         DL_CALL_FUNC_AT_ADDR (dl_elf_func, tpnt->loadaddr, (void(*)(void)));
1053                 }
1054
1055                 _dl_run_init_array(tpnt);
1056         }
1057
1058         /* Find the real malloc function and make ldso functions use that from now on */
1059         _dl_malloc_function = (void* (*)(size_t)) (intptr_t) _dl_find_hash(__C_SYMBOL_PREFIX__ "malloc",
1060                         _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT, NULL);
1061
1062 #if USE_TLS
1063         /* Find the real functions and make ldso functions use them from now on */
1064         _dl_calloc_function = (void* (*)(size_t, size_t)) (intptr_t)
1065                 _dl_find_hash(__C_SYMBOL_PREFIX__ "calloc", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT, NULL);
1066
1067         _dl_realloc_function = (void* (*)(void *, size_t)) (intptr_t)
1068                 _dl_find_hash(__C_SYMBOL_PREFIX__ "realloc", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT, NULL);
1069
1070         _dl_free_function = (void (*)(void *)) (intptr_t)
1071                 _dl_find_hash(__C_SYMBOL_PREFIX__ "free", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT, NULL);
1072
1073         _dl_memalign_function = (void* (*)(size_t, size_t)) (intptr_t)
1074                 _dl_find_hash(__C_SYMBOL_PREFIX__ "memalign", _dl_symbol_tables, NULL, ELF_RTYPE_CLASS_PLT, NULL);
1075
1076 #endif
1077
1078         /* Notify the debugger that all objects are now mapped in.  */
1079         _dl_debug_addr->r_state = RT_CONSISTENT;
1080         _dl_debug_state();
1081 }
1082
1083 #include "dl-hash.c"
1084 #include "dl-elf.c"