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Commit | Line | Data |
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d66e34cd | 1 | /* Run time dynamic linker. |
f420344c | 2 | Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
afd4eb37 | 3 | This file is part of the GNU C Library. |
d66e34cd | 4 | |
afd4eb37 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
d66e34cd | 9 | |
afd4eb37 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
d66e34cd | 14 | |
afd4eb37 UD |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
d66e34cd | 19 | |
7dea968e | 20 | #include <fcntl.h> |
d66e34cd | 21 | #include <stdlib.h> |
f51d1dfd | 22 | #include <string.h> |
d66e34cd | 23 | #include <unistd.h> |
2064087b | 24 | #include <sys/mman.h> /* Check if MAP_ANON is defined. */ |
a853022c | 25 | #include <elf/ldsodefs.h> |
ce37fa88 | 26 | #include <stdio-common/_itoa.h> |
f21acc89 | 27 | #include <entry.h> |
c94a8080 | 28 | #include <fpu_control.h> |
db276fa1 | 29 | #include <hp-timing.h> |
f5348425 | 30 | #include "dynamic-link.h" |
e2102c14 | 31 | #include "dl-librecon.h" |
f5348425 | 32 | |
a853022c | 33 | #include <assert.h> |
f5348425 | 34 | |
d66e34cd RM |
35 | /* System-specific function to do initial startup for the dynamic linker. |
36 | After this, file access calls and getenv must work. This is responsible | |
cddcfecf | 37 | for setting __libc_enable_secure if we need to be secure (e.g. setuid), |
d66e34cd | 38 | and for setting _dl_argc and _dl_argv, and then calling _dl_main. */ |
266180eb RM |
39 | extern ElfW(Addr) _dl_sysdep_start (void **start_argptr, |
40 | void (*dl_main) (const ElfW(Phdr) *phdr, | |
41 | ElfW(Half) phent, | |
42 | ElfW(Addr) *user_entry)); | |
4cb20290 | 43 | extern void _dl_sysdep_start_cleanup (void); |
d66e34cd | 44 | |
08cac4ac UD |
45 | /* This function is used to unload the cache file if necessary. */ |
46 | extern void _dl_unload_cache (void); | |
47 | ||
14bab8de UD |
48 | /* System-dependent function to read a file's whole contents |
49 | in the most convenient manner available. */ | |
50 | extern void *_dl_sysdep_read_whole_file (const char *filename, | |
51 | size_t *filesize_ptr, | |
52 | int mmap_prot); | |
53 | ||
fd26970f | 54 | /* Helper function to handle errors while resolving symbols. */ |
c84142e8 UD |
55 | static void print_unresolved (int errcode, const char *objname, |
56 | const char *errsting); | |
57 | ||
58 | /* Helper function to handle errors when a version is missing. */ | |
59 | static void print_missing_version (int errcode, const char *objname, | |
60 | const char *errsting); | |
fd26970f | 61 | |
db276fa1 UD |
62 | /* Print the various times we collected. */ |
63 | static void print_statistics (void); | |
ea278354 UD |
64 | |
65 | /* This is a list of all the modes the dynamic loader can be in. */ | |
66 | enum mode { normal, list, verify, trace }; | |
67 | ||
68 | /* Process all environments variables the dynamic linker must recognize. | |
69 | Since all of them start with `LD_' we are a bit smarter while finding | |
70 | all the entries. */ | |
71 | static void process_envvars (enum mode *modep, int *lazyp); | |
72 | ||
d66e34cd RM |
73 | int _dl_argc; |
74 | char **_dl_argv; | |
ceb27555 | 75 | unsigned int _dl_skip_args; /* Nonzero if we were run directly. */ |
cf29ffbe | 76 | int _dl_verbose; |
0a54e401 UD |
77 | const char *_dl_platform; |
78 | size_t _dl_platformlen; | |
f41c8091 | 79 | unsigned long _dl_hwcap; |
c94a8080 | 80 | fpu_control_t _dl_fpu_control = _FPU_DEFAULT; |
0a54e401 | 81 | struct r_search_path *_dl_search_paths; |
3996f34b UD |
82 | const char *_dl_profile; |
83 | const char *_dl_profile_output; | |
a3d6fb9b | 84 | struct link_map *_dl_profile_map; |
12b5b6b7 | 85 | int _dl_lazy; |
b5efde2f | 86 | int _dl_debug_libs; |
7dea968e | 87 | int _dl_debug_impcalls; |
0c367d92 | 88 | int _dl_debug_bindings; |
de100ca7 | 89 | int _dl_debug_symbols; |
8193034b UD |
90 | int _dl_debug_versions; |
91 | int _dl_debug_reloc; | |
92 | int _dl_debug_files; | |
db276fa1 | 93 | int _dl_debug_statistics; |
b0a01055 | 94 | const char *_dl_inhibit_rpath; /* RPATH values which should be |
310930c1 | 95 | ignored. */ |
f787edde | 96 | const char *_dl_origin_path; |
d66e34cd | 97 | |
be935610 UD |
98 | /* This is a pointer to the map for the main object and through it to |
99 | all loaded objects. */ | |
100 | struct link_map *_dl_loaded; | |
101 | /* Pointer to the l_searchlist element of the link map of the main object. */ | |
102 | struct r_scope_elem *_dl_main_searchlist; | |
604510f7 UD |
103 | /* Copy of the content of `_dl_main_searchlist'. */ |
104 | struct r_scope_elem _dl_initial_searchlist; | |
be935610 UD |
105 | /* Array which is used when looking up in the global scope. */ |
106 | struct r_scope_elem *_dl_global_scope[2]; | |
107 | ||
39778c6c UD |
108 | /* Set nonzero during loading and initialization of executable and |
109 | libraries, cleared before the executable's entry point runs. This | |
110 | must not be initialized to nonzero, because the unused dynamic | |
111 | linker loaded in for libc.so's "ld.so.1" dep will provide the | |
112 | definition seen by libc.so's initializer; that value must be zero, | |
113 | and will be since that dynamic linker's _dl_start and dl_main will | |
114 | never be called. */ | |
115 | int _dl_starting_up; | |
116 | ||
c0fb8a56 | 117 | |
266180eb RM |
118 | static void dl_main (const ElfW(Phdr) *phdr, |
119 | ElfW(Half) phent, | |
120 | ElfW(Addr) *user_entry); | |
d66e34cd | 121 | |
ee188d55 | 122 | struct link_map _dl_rtld_map; |
c84142e8 | 123 | struct libname_list _dl_rtld_libname; |
f41c8091 | 124 | struct libname_list _dl_rtld_libname2; |
86d2c878 | 125 | |
db276fa1 UD |
126 | /* Variable for statistics. */ |
127 | static hp_timing_t rtld_total_time; | |
128 | static hp_timing_t relocate_time; | |
129 | static hp_timing_t load_time; | |
130 | extern unsigned long int _dl_num_relocations; /* in dl-lookup.c */ | |
131 | ||
6a1db4ff UD |
132 | static ElfW(Addr) _dl_start_final (void *arg, struct link_map *bootstrap_map_p, |
133 | hp_timing_t start_time); | |
134 | ||
b1dbbaa4 RM |
135 | #ifdef RTLD_START |
136 | RTLD_START | |
137 | #else | |
138 | #error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START" | |
139 | #endif | |
140 | ||
ceb2d9aa | 141 | static ElfW(Addr) |
d66e34cd RM |
142 | _dl_start (void *arg) |
143 | { | |
86d2c878 | 144 | struct link_map bootstrap_map; |
db276fa1 | 145 | hp_timing_t start_time; |
264ec183 | 146 | size_t cnt; |
d66e34cd | 147 | |
b1dbbaa4 RM |
148 | /* This #define produces dynamic linking inline functions for |
149 | bootstrap relocation instead of general-purpose relocation. */ | |
150 | #define RTLD_BOOTSTRAP | |
50463d27 UD |
151 | #define RESOLVE(sym, version, flags) \ |
152 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : bootstrap_map.l_addr) | |
b1dbbaa4 RM |
153 | #include "dynamic-link.h" |
154 | ||
db276fa1 UD |
155 | if (HP_TIMING_INLINE && HP_TIMING_AVAIL) |
156 | HP_TIMING_NOW (start_time); | |
157 | ||
264ec183 UD |
158 | /* Partly clean the `bootstrap_map' structure up. Don't use `memset' |
159 | since it might nor be built in or inlined and we cannot make function | |
160 | calls at this point. */ | |
161 | for (cnt = 0; | |
162 | cnt < sizeof (bootstrap_map.l_info) / sizeof (bootstrap_map.l_info[0]); | |
163 | ++cnt) | |
164 | bootstrap_map.l_info[cnt] = 0; | |
165 | ||
d66e34cd | 166 | /* Figure out the run-time load address of the dynamic linker itself. */ |
86d2c878 | 167 | bootstrap_map.l_addr = elf_machine_load_address (); |
d66e34cd | 168 | |
47707456 UD |
169 | /* Read our own dynamic section and fill in the info array. */ |
170 | bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic (); | |
d3ac2d47 | 171 | elf_get_dynamic_info (&bootstrap_map); |
d66e34cd RM |
172 | |
173 | #ifdef ELF_MACHINE_BEFORE_RTLD_RELOC | |
86d2c878 | 174 | ELF_MACHINE_BEFORE_RTLD_RELOC (bootstrap_map.l_info); |
d66e34cd RM |
175 | #endif |
176 | ||
177 | /* Relocate ourselves so we can do normal function calls and | |
178 | data access using the global offset table. */ | |
421f82e5 | 179 | |
3996f34b | 180 | ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0); |
ea7eb7e3 UD |
181 | /* Please note that we don't allow profiling of this object and |
182 | therefore need not test whether we have to allocate the array | |
183 | for the relocation results (as done in dl-reloc.c). */ | |
421f82e5 | 184 | |
d66e34cd RM |
185 | /* Now life is sane; we can call functions and access global data. |
186 | Set up to use the operating system facilities, and find out from | |
187 | the operating system's program loader where to find the program | |
6a1db4ff UD |
188 | header table in core. Put the rest of _dl_start into a separate |
189 | function, that way the compiler cannot put accesses to the GOT | |
190 | before ELF_DYNAMIC_RELOCATE. */ | |
191 | return _dl_start_final (arg, &bootstrap_map, start_time); | |
192 | } | |
193 | ||
194 | ||
195 | static ElfW(Addr) | |
196 | _dl_start_final (void *arg, struct link_map *bootstrap_map_p, | |
197 | hp_timing_t start_time) | |
198 | { | |
199 | /* The use of `alloca' here looks ridiculous but it helps. The goal | |
200 | is to avoid the function from being inlined. There is no official | |
201 | way to do this so we use this trick. gcc never inlines functions | |
202 | which use `alloca'. */ | |
203 | ElfW(Addr) *start_addr = alloca (sizeof (ElfW(Addr))); | |
d66e34cd | 204 | |
db276fa1 UD |
205 | if (HP_TIMING_AVAIL) |
206 | { | |
207 | /* If it hasn't happen yet record the startup time. */ | |
208 | if (! HP_TIMING_INLINE) | |
209 | HP_TIMING_NOW (start_time); | |
210 | ||
211 | /* Initialize the timing functions. */ | |
212 | HP_TIMING_DIFF_INIT (); | |
213 | } | |
214 | ||
86d2c878 | 215 | /* Transfer data about ourselves to the permanent link_map structure. */ |
6a1db4ff UD |
216 | _dl_rtld_map.l_addr = bootstrap_map_p->l_addr; |
217 | _dl_rtld_map.l_ld = bootstrap_map_p->l_ld; | |
f41c8091 | 218 | _dl_rtld_map.l_opencount = 1; |
6a1db4ff | 219 | memcpy (_dl_rtld_map.l_info, bootstrap_map_p->l_info, |
ee188d55 RM |
220 | sizeof _dl_rtld_map.l_info); |
221 | _dl_setup_hash (&_dl_rtld_map); | |
86d2c878 | 222 | |
052b6a6c UD |
223 | /* Don't bother trying to work out how ld.so is mapped in memory. */ |
224 | _dl_rtld_map.l_map_start = ~0; | |
225 | _dl_rtld_map.l_map_end = ~0; | |
226 | ||
d66e34cd RM |
227 | /* Call the OS-dependent function to set up life so we can do things like |
228 | file access. It will call `dl_main' (below) to do all the real work | |
229 | of the dynamic linker, and then unwind our frame and run the user | |
230 | entry point on the same stack we entered on. */ | |
6a1db4ff | 231 | *start_addr = _dl_sysdep_start (arg, &dl_main); |
db276fa1 UD |
232 | |
233 | if (HP_TIMING_AVAIL) | |
234 | { | |
235 | hp_timing_t end_time; | |
236 | ||
237 | /* Get the current time. */ | |
238 | HP_TIMING_NOW (end_time); | |
239 | ||
240 | /* Compute the difference. */ | |
241 | HP_TIMING_DIFF (rtld_total_time, start_time, end_time); | |
242 | } | |
243 | ||
244 | if (_dl_debug_statistics) | |
245 | print_statistics (); | |
246 | ||
6a1db4ff | 247 | return *start_addr; |
d66e34cd RM |
248 | } |
249 | ||
d66e34cd RM |
250 | /* Now life is peachy; we can do all normal operations. |
251 | On to the real work. */ | |
252 | ||
f21acc89 | 253 | void ENTRY_POINT (void); |
d66e34cd | 254 | |
993b3242 UD |
255 | /* Some helper functions. */ |
256 | ||
257 | /* Arguments to relocate_doit. */ | |
258 | struct relocate_args | |
259 | { | |
260 | struct link_map *l; | |
261 | int lazy; | |
262 | }; | |
263 | ||
264 | struct map_args | |
265 | { | |
266 | /* Argument to map_doit. */ | |
267 | char *str; | |
268 | /* Return value of map_doit. */ | |
269 | struct link_map *main_map; | |
270 | }; | |
271 | ||
272 | /* Arguments to version_check_doit. */ | |
273 | struct version_check_args | |
274 | { | |
993b3242 UD |
275 | int doexit; |
276 | }; | |
277 | ||
278 | static void | |
279 | relocate_doit (void *a) | |
280 | { | |
281 | struct relocate_args *args = (struct relocate_args *) a; | |
282 | ||
be935610 | 283 | _dl_relocate_object (args->l, args->l->l_scope, |
c0fb8a56 | 284 | args->lazy, 0); |
993b3242 UD |
285 | } |
286 | ||
287 | static void | |
288 | map_doit (void *a) | |
289 | { | |
be935610 | 290 | struct map_args *args = (struct map_args *) a; |
c6222ab9 | 291 | args->main_map = _dl_map_object (NULL, args->str, 0, lt_library, 0); |
993b3242 UD |
292 | } |
293 | ||
294 | static void | |
295 | version_check_doit (void *a) | |
296 | { | |
be935610 UD |
297 | struct version_check_args *args = (struct version_check_args *) a; |
298 | if (_dl_check_all_versions (_dl_loaded, 1) && args->doexit) | |
993b3242 UD |
299 | /* We cannot start the application. Abort now. */ |
300 | _exit (1); | |
301 | } | |
302 | ||
ce37fa88 UD |
303 | |
304 | static inline struct link_map * | |
305 | find_needed (const char *name) | |
306 | { | |
be935610 | 307 | unsigned int n = _dl_loaded->l_searchlist.r_nlist; |
ce37fa88 | 308 | |
be935610 UD |
309 | while (n-- > 0) |
310 | if (_dl_name_match_p (name, _dl_loaded->l_searchlist.r_list[n])) | |
311 | return _dl_loaded->l_searchlist.r_list[n]; | |
ce37fa88 UD |
312 | |
313 | /* Should never happen. */ | |
314 | return NULL; | |
315 | } | |
316 | ||
317 | static int | |
318 | match_version (const char *string, struct link_map *map) | |
319 | { | |
f420344c | 320 | const char *strtab = (const void *) map->l_info[DT_STRTAB]->d_un.d_ptr; |
ce37fa88 UD |
321 | ElfW(Verdef) *def; |
322 | ||
323 | #define VERDEFTAG (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (DT_VERDEF)) | |
324 | if (map->l_info[VERDEFTAG] == NULL) | |
325 | /* The file has no symbol versioning. */ | |
326 | return 0; | |
327 | ||
328 | def = (ElfW(Verdef) *) ((char *) map->l_addr | |
329 | + map->l_info[VERDEFTAG]->d_un.d_ptr); | |
330 | while (1) | |
331 | { | |
332 | ElfW(Verdaux) *aux = (ElfW(Verdaux) *) ((char *) def + def->vd_aux); | |
333 | ||
334 | /* Compare the version strings. */ | |
335 | if (strcmp (string, strtab + aux->vda_name) == 0) | |
336 | /* Bingo! */ | |
337 | return 1; | |
338 | ||
339 | /* If no more definitions we failed to find what we want. */ | |
340 | if (def->vd_next == 0) | |
341 | break; | |
342 | ||
343 | /* Next definition. */ | |
344 | def = (ElfW(Verdef) *) ((char *) def + def->vd_next); | |
345 | } | |
346 | ||
347 | return 0; | |
348 | } | |
349 | ||
120b4c49 UD |
350 | static const char *library_path; /* The library search path. */ |
351 | static const char *preloadlist; /* The list preloaded objects. */ | |
352 | static int version_info; /* Nonzero if information about | |
353 | versions has to be printed. */ | |
a1a9d215 | 354 | |
d66e34cd | 355 | static void |
266180eb RM |
356 | dl_main (const ElfW(Phdr) *phdr, |
357 | ElfW(Half) phent, | |
358 | ElfW(Addr) *user_entry) | |
d66e34cd | 359 | { |
266180eb | 360 | const ElfW(Phdr) *ph; |
ea278354 | 361 | enum mode mode; |
2064087b RM |
362 | struct link_map **preloads; |
363 | unsigned int npreloads; | |
14bab8de UD |
364 | size_t file_size; |
365 | char *file; | |
2f6d1f1b | 366 | int has_interp = 0; |
77aba05b | 367 | unsigned int i; |
9a51759b | 368 | int rtld_is_main = 0; |
db276fa1 UD |
369 | hp_timing_t start; |
370 | hp_timing_t stop; | |
371 | hp_timing_t diff; | |
d66e34cd | 372 | |
ea278354 | 373 | /* Process the environment variable which control the behaviour. */ |
12b5b6b7 | 374 | process_envvars (&mode, &_dl_lazy); |
3996f34b | 375 | |
46ec036d UD |
376 | /* Set up a flag which tells we are just starting. */ |
377 | _dl_starting_up = 1; | |
378 | ||
f21acc89 | 379 | if (*user_entry == (ElfW(Addr)) &ENTRY_POINT) |
0200214b RM |
380 | { |
381 | /* Ho ho. We are not the program interpreter! We are the program | |
382 | itself! This means someone ran ld.so as a command. Well, that | |
383 | might be convenient to do sometimes. We support it by | |
384 | interpreting the args like this: | |
385 | ||
386 | ld.so PROGRAM ARGS... | |
387 | ||
388 | The first argument is the name of a file containing an ELF | |
389 | executable we will load and run with the following arguments. | |
390 | To simplify life here, PROGRAM is searched for using the | |
391 | normal rules for shared objects, rather than $PATH or anything | |
392 | like that. We just load it and use its entry point; we don't | |
393 | pay attention to its PT_INTERP command (we are the interpreter | |
394 | ourselves). This is an easy way to test a new ld.so before | |
395 | installing it. */ | |
9a51759b | 396 | rtld_is_main = 1; |
421f82e5 | 397 | |
ffee1316 RM |
398 | /* Note the place where the dynamic linker actually came from. */ |
399 | _dl_rtld_map.l_name = _dl_argv[0]; | |
6a76c115 | 400 | |
fd26970f UD |
401 | while (_dl_argc > 1) |
402 | if (! strcmp (_dl_argv[1], "--list")) | |
403 | { | |
404 | mode = list; | |
12b5b6b7 | 405 | _dl_lazy = -1; /* This means do no dependency analysis. */ |
61965e9b | 406 | |
fd26970f UD |
407 | ++_dl_skip_args; |
408 | --_dl_argc; | |
409 | ++_dl_argv; | |
410 | } | |
411 | else if (! strcmp (_dl_argv[1], "--verify")) | |
412 | { | |
413 | mode = verify; | |
6a76c115 | 414 | |
fd26970f UD |
415 | ++_dl_skip_args; |
416 | --_dl_argc; | |
417 | ++_dl_argv; | |
418 | } | |
310930c1 | 419 | else if (! strcmp (_dl_argv[1], "--library-path") && _dl_argc > 2) |
880f421f UD |
420 | { |
421 | library_path = _dl_argv[2]; | |
422 | ||
310930c1 UD |
423 | _dl_skip_args += 2; |
424 | _dl_argc -= 2; | |
425 | _dl_argv += 2; | |
426 | } | |
b0a01055 | 427 | else if (! strcmp (_dl_argv[1], "--inhibit-rpath") && _dl_argc > 2) |
310930c1 | 428 | { |
b0a01055 | 429 | _dl_inhibit_rpath = _dl_argv[2]; |
310930c1 | 430 | |
880f421f UD |
431 | _dl_skip_args += 2; |
432 | _dl_argc -= 2; | |
433 | _dl_argv += 2; | |
434 | } | |
fd26970f UD |
435 | else |
436 | break; | |
d66e34cd | 437 | |
61eb22d3 UD |
438 | /* If we have no further argument the program was called incorrectly. |
439 | Grant the user some education. */ | |
440 | if (_dl_argc < 2) | |
441 | _dl_sysdep_fatal ("\ | |
2bcf29ba | 442 | Usage: ld.so [OPTION]... EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\ |
61eb22d3 UD |
443 | You have invoked `ld.so', the helper program for shared library executables.\n\ |
444 | This program usually lives in the file `/lib/ld.so', and special directives\n\ | |
445 | in executable files using ELF shared libraries tell the system's program\n\ | |
446 | loader to load the helper program from this file. This helper program loads\n\ | |
447 | the shared libraries needed by the program executable, prepares the program\n\ | |
448 | to run, and runs it. You may invoke this helper program directly from the\n\ | |
449 | command line to load and run an ELF executable file; this is like executing\n\ | |
450 | that file itself, but always uses this helper program from the file you\n\ | |
451 | specified, instead of the helper program file specified in the executable\n\ | |
452 | file you run. This is mostly of use for maintainers to test new versions\n\ | |
2bcf29ba UD |
453 | of this helper program; chances are you did not intend to run this program.\n\ |
454 | \n\ | |
b0a01055 UD |
455 | --list list all dependencies and how they are resolved\n\ |
456 | --verify verify that given object really is a dynamically linked\n\ | |
457 | object we get handle\n\ | |
458 | --library-path PATH use given PATH instead of content of the environment\n\ | |
459 | variable LD_LIBRARY_PATH\n\ | |
fcf70d41 UD |
460 | --inhibit-rpath LIST ignore RUNPATH and RPATH information in object names\n\ |
461 | in LIST\n", | |
61eb22d3 UD |
462 | NULL); |
463 | ||
0200214b RM |
464 | ++_dl_skip_args; |
465 | --_dl_argc; | |
466 | ++_dl_argv; | |
91f62ce6 | 467 | |
da832465 UD |
468 | /* Initialize the data structures for the search paths for shared |
469 | objects. */ | |
470 | _dl_init_paths (library_path); | |
471 | ||
9a821cf9 | 472 | if (__builtin_expect (mode, normal) == verify) |
2de99474 | 473 | { |
dcf0671d | 474 | char *err_str = NULL; |
993b3242 | 475 | struct map_args args; |
2de99474 | 476 | |
993b3242 | 477 | args.str = _dl_argv[0]; |
8d9618b7 | 478 | (void) _dl_catch_error (&err_str, map_doit, &args); |
2de99474 | 479 | if (err_str != NULL) |
dcf0671d UD |
480 | { |
481 | free (err_str); | |
482 | _exit (EXIT_FAILURE); | |
483 | } | |
2de99474 UD |
484 | } |
485 | else | |
db276fa1 UD |
486 | { |
487 | HP_TIMING_NOW (start); | |
488 | _dl_map_object (NULL, _dl_argv[0], 0, lt_library, 0); | |
489 | HP_TIMING_NOW (stop); | |
61e0617a | 490 | |
db276fa1 UD |
491 | HP_TIMING_DIFF (load_time, start, stop); |
492 | } | |
2de99474 | 493 | |
be935610 UD |
494 | phdr = _dl_loaded->l_phdr; |
495 | phent = _dl_loaded->l_phnum; | |
143e2b96 UD |
496 | /* We overwrite here a pointer to a malloc()ed string. But since |
497 | the malloc() implementation used at this point is the dummy | |
498 | implementations which has no real free() function it does not | |
499 | makes sense to free the old string first. */ | |
be935610 UD |
500 | _dl_loaded->l_name = (char *) ""; |
501 | *user_entry = _dl_loaded->l_entry; | |
0200214b RM |
502 | } |
503 | else | |
504 | { | |
505 | /* Create a link_map for the executable itself. | |
506 | This will be what dlopen on "" returns. */ | |
87c812c2 | 507 | _dl_new_object ((char *) "", "", lt_executable, NULL); |
be935610 | 508 | if (_dl_loaded == NULL) |
762a2918 | 509 | _dl_sysdep_fatal ("cannot allocate memory for link map\n", NULL); |
be935610 UD |
510 | _dl_loaded->l_phdr = phdr; |
511 | _dl_loaded->l_phnum = phent; | |
512 | _dl_loaded->l_entry = *user_entry; | |
513 | _dl_loaded->l_opencount = 1; | |
da832465 | 514 | |
61e0617a UD |
515 | /* At this point we are in a bit of trouble. We would have to |
516 | fill in the values for l_dev and l_ino. But in general we | |
517 | do not know where the file is. We also do not handle AT_EXECFD | |
518 | even if it would be passed up. | |
519 | ||
520 | We leave the values here defined to 0. This is normally no | |
521 | problem as the program code itself is normally no shared | |
522 | object and therefore cannot be loaded dynamically. Nothing | |
523 | prevent the use of dynamic binaries and in these situations | |
524 | we might get problems. We might not be able to find out | |
525 | whether the object is already loaded. But since there is no | |
526 | easy way out and because the dynamic binary must also not | |
527 | have an SONAME we ignore this program for now. If it becomes | |
528 | a problem we can force people using SONAMEs. */ | |
529 | ||
97a51d8a UD |
530 | /* We delay initializing the path structure until we got the dynamic |
531 | information for the program. */ | |
0200214b RM |
532 | } |
533 | ||
052b6a6c | 534 | /* It is not safe to load stuff after the main program. */ |
be935610 | 535 | _dl_loaded->l_map_end = ~0; |
052b6a6c | 536 | /* Perhaps the executable has no PT_LOAD header entries at all. */ |
be935610 | 537 | _dl_loaded->l_map_start = ~0; |
052b6a6c | 538 | |
0200214b RM |
539 | /* Scan the program header table for the dynamic section. */ |
540 | for (ph = phdr; ph < &phdr[phent]; ++ph) | |
541 | switch (ph->p_type) | |
542 | { | |
da832465 UD |
543 | case PT_PHDR: |
544 | /* Find out the load address. */ | |
be935610 | 545 | _dl_loaded->l_addr = (ElfW(Addr)) phdr - ph->p_vaddr; |
da832465 | 546 | break; |
0200214b RM |
547 | case PT_DYNAMIC: |
548 | /* This tells us where to find the dynamic section, | |
549 | which tells us everything we need to do. */ | |
be935610 | 550 | _dl_loaded->l_ld = (void *) _dl_loaded->l_addr + ph->p_vaddr; |
0200214b RM |
551 | break; |
552 | case PT_INTERP: | |
553 | /* This "interpreter segment" was used by the program loader to | |
554 | find the program interpreter, which is this program itself, the | |
555 | dynamic linker. We note what name finds us, so that a future | |
556 | dlopen call or DT_NEEDED entry, for something that wants to link | |
557 | against the dynamic linker as a shared library, will know that | |
558 | the shared object is already loaded. */ | |
be935610 UD |
559 | _dl_rtld_libname.name = ((const char *) _dl_loaded->l_addr |
560 | + ph->p_vaddr); | |
c84142e8 UD |
561 | _dl_rtld_libname.next = NULL; |
562 | _dl_rtld_map.l_libname = &_dl_rtld_libname; | |
f41c8091 UD |
563 | |
564 | /* Ordinarilly, we would get additional names for the loader from | |
565 | our DT_SONAME. This can't happen if we were actually linked as | |
566 | a static executable (detect this case when we have no DYNAMIC). | |
567 | If so, assume the filename component of the interpreter path to | |
568 | be our SONAME, and add it to our name list. */ | |
569 | if (_dl_rtld_map.l_ld == NULL) | |
570 | { | |
571 | char *p = strrchr (_dl_rtld_libname.name, '/'); | |
572 | if (p) | |
573 | { | |
574 | _dl_rtld_libname2.name = p+1; | |
575 | _dl_rtld_libname2.next = NULL; | |
576 | _dl_rtld_libname.next = &_dl_rtld_libname2; | |
577 | } | |
578 | } | |
579 | ||
2f6d1f1b | 580 | has_interp = 1; |
0200214b | 581 | break; |
052b6a6c UD |
582 | case PT_LOAD: |
583 | /* Remember where the main program starts in memory. */ | |
584 | { | |
585 | ElfW(Addr) mapstart; | |
be935610 UD |
586 | mapstart = _dl_loaded->l_addr + (ph->p_vaddr & ~(ph->p_align - 1)); |
587 | if (_dl_loaded->l_map_start > mapstart) | |
588 | _dl_loaded->l_map_start = mapstart; | |
052b6a6c UD |
589 | } |
590 | break; | |
0200214b | 591 | } |
ffee1316 | 592 | if (! _dl_rtld_map.l_libname && _dl_rtld_map.l_name) |
c84142e8 UD |
593 | { |
594 | /* We were invoked directly, so the program might not have a | |
595 | PT_INTERP. */ | |
596 | _dl_rtld_libname.name = _dl_rtld_map.l_name; | |
597 | _dl_rtld_libname.next = NULL; | |
598 | _dl_rtld_map.l_libname = &_dl_rtld_libname; | |
599 | } | |
ffee1316 RM |
600 | else |
601 | assert (_dl_rtld_map.l_libname); /* How else did we get here? */ | |
0200214b | 602 | |
9a51759b UD |
603 | if (! rtld_is_main) |
604 | { | |
605 | /* Extract the contents of the dynamic section for easy access. */ | |
d3ac2d47 | 606 | elf_get_dynamic_info (_dl_loaded); |
9a51759b UD |
607 | if (_dl_loaded->l_info[DT_HASH]) |
608 | /* Set up our cache of pointers into the hash table. */ | |
609 | _dl_setup_hash (_dl_loaded); | |
610 | } | |
0200214b | 611 | |
9a821cf9 | 612 | if (__builtin_expect (mode, normal) == verify) |
e2102c14 UD |
613 | { |
614 | /* We were called just to verify that this is a dynamic | |
615 | executable using us as the program interpreter. Exit with an | |
616 | error if we were not able to load the binary or no interpreter | |
617 | is specified (i.e., this is no dynamically linked binary. */ | |
be935610 | 618 | if (_dl_loaded->l_ld == NULL) |
e2102c14 | 619 | _exit (1); |
e2102c14 UD |
620 | |
621 | /* We allow here some platform specific code. */ | |
622 | #ifdef DISTINGUISH_LIB_VERSIONS | |
623 | DISTINGUISH_LIB_VERSIONS; | |
624 | #endif | |
eb406346 | 625 | _exit (has_interp ? 0 : 2); |
e2102c14 UD |
626 | } |
627 | ||
9a51759b | 628 | if (! rtld_is_main) |
97a51d8a UD |
629 | /* Initialize the data structures for the search paths for shared |
630 | objects. */ | |
120b4c49 | 631 | _dl_init_paths (library_path); |
97a51d8a | 632 | |
0200214b | 633 | /* Put the link_map for ourselves on the chain so it can be found by |
ceb2d9aa | 634 | name. Note that at this point the global chain of link maps contains |
be935610 | 635 | exactly one element, which is pointed to by _dl_loaded. */ |
ffee1316 RM |
636 | if (! _dl_rtld_map.l_name) |
637 | /* If not invoked directly, the dynamic linker shared object file was | |
638 | found by the PT_INTERP name. */ | |
c84142e8 | 639 | _dl_rtld_map.l_name = (char *) _dl_rtld_map.l_libname->name; |
ba79d61b | 640 | _dl_rtld_map.l_type = lt_library; |
be935610 UD |
641 | _dl_loaded->l_next = &_dl_rtld_map; |
642 | _dl_rtld_map.l_prev = _dl_loaded; | |
0200214b | 643 | |
14bab8de UD |
644 | /* We have two ways to specify objects to preload: via environment |
645 | variable and via the file /etc/ld.so.preload. The later can also | |
646 | be used when security is enabled. */ | |
2064087b RM |
647 | preloads = NULL; |
648 | npreloads = 0; | |
14bab8de | 649 | |
fd26970f | 650 | if (preloadlist) |
c4029823 | 651 | { |
566efee2 UD |
652 | /* The LD_PRELOAD environment variable gives list of libraries |
653 | separated by white space or colons that are loaded before the | |
fd26970f UD |
654 | executable's dependencies and prepended to the global scope |
655 | list. If the binary is running setuid all elements | |
656 | containing a '/' are ignored since it is insecure. */ | |
657 | char *list = strdupa (preloadlist); | |
658 | char *p; | |
db276fa1 UD |
659 | |
660 | HP_TIMING_NOW (start); | |
661 | ||
566efee2 | 662 | while ((p = strsep (&list, " :")) != NULL) |
e2102c14 UD |
663 | if (p[0] != '\0' |
664 | && (! __libc_enable_secure || strchr (p, '/') == NULL)) | |
fd26970f | 665 | { |
be935610 | 666 | struct link_map *new_map = _dl_map_object (_dl_loaded, p, 1, |
c6222ab9 | 667 | lt_library, 0); |
bd355af0 UD |
668 | if (new_map->l_opencount == 1) |
669 | /* It is no duplicate. */ | |
670 | ++npreloads; | |
fd26970f | 671 | } |
db276fa1 UD |
672 | |
673 | HP_TIMING_NOW (stop); | |
674 | HP_TIMING_DIFF (diff, start, stop); | |
675 | HP_TIMING_ACCUM_NT (load_time, diff); | |
c4029823 UD |
676 | } |
677 | ||
14bab8de UD |
678 | /* Read the contents of the file. */ |
679 | file = _dl_sysdep_read_whole_file ("/etc/ld.so.preload", &file_size, | |
680 | PROT_READ | PROT_WRITE); | |
681 | if (file) | |
682 | { | |
683 | /* Parse the file. It contains names of libraries to be loaded, | |
684 | separated by white spaces or `:'. It may also contain | |
685 | comments introduced by `#'. */ | |
686 | char *problem; | |
687 | char *runp; | |
688 | size_t rest; | |
689 | ||
690 | /* Eliminate comments. */ | |
691 | runp = file; | |
692 | rest = file_size; | |
693 | while (rest > 0) | |
694 | { | |
695 | char *comment = memchr (runp, '#', rest); | |
696 | if (comment == NULL) | |
697 | break; | |
698 | ||
699 | rest -= comment - runp; | |
700 | do | |
701 | *comment = ' '; | |
702 | while (--rest > 0 && *++comment != '\n'); | |
703 | } | |
704 | ||
705 | /* We have one problematic case: if we have a name at the end of | |
706 | the file without a trailing terminating characters, we cannot | |
707 | place the \0. Handle the case separately. */ | |
49891c10 UD |
708 | if (file[file_size - 1] != ' ' && file[file_size - 1] != '\t' |
709 | && file[file_size - 1] != '\n' && file[file_size - 1] != ':') | |
14bab8de UD |
710 | { |
711 | problem = &file[file_size]; | |
712 | while (problem > file && problem[-1] != ' ' && problem[-1] != '\t' | |
49891c10 | 713 | && problem[-1] != '\n' && problem[-1] != ':') |
14bab8de UD |
714 | --problem; |
715 | ||
716 | if (problem > file) | |
717 | problem[-1] = '\0'; | |
718 | } | |
719 | else | |
49891c10 UD |
720 | { |
721 | problem = NULL; | |
722 | file[file_size - 1] = '\0'; | |
723 | } | |
14bab8de | 724 | |
db276fa1 UD |
725 | HP_TIMING_NOW (start); |
726 | ||
14bab8de UD |
727 | if (file != problem) |
728 | { | |
729 | char *p; | |
e2102c14 | 730 | runp = file; |
14bab8de | 731 | while ((p = strsep (&runp, ": \t\n")) != NULL) |
e2102c14 UD |
732 | if (p[0] != '\0') |
733 | { | |
be935610 | 734 | struct link_map *new_map = _dl_map_object (_dl_loaded, p, 1, |
e2102c14 UD |
735 | lt_library, 0); |
736 | if (new_map->l_opencount == 1) | |
737 | /* It is no duplicate. */ | |
738 | ++npreloads; | |
739 | } | |
14bab8de UD |
740 | } |
741 | ||
742 | if (problem != NULL) | |
743 | { | |
744 | char *p = strndupa (problem, file_size - (problem - file)); | |
be935610 | 745 | struct link_map *new_map = _dl_map_object (_dl_loaded, p, 1, |
c6222ab9 | 746 | lt_library, 0); |
bd355af0 UD |
747 | if (new_map->l_opencount == 1) |
748 | /* It is no duplicate. */ | |
749 | ++npreloads; | |
14bab8de UD |
750 | } |
751 | ||
db276fa1 UD |
752 | HP_TIMING_NOW (stop); |
753 | HP_TIMING_DIFF (diff, start, stop); | |
754 | HP_TIMING_ACCUM_NT (load_time, diff); | |
755 | ||
14bab8de UD |
756 | /* We don't need the file anymore. */ |
757 | __munmap (file, file_size); | |
758 | } | |
759 | ||
14bab8de UD |
760 | if (npreloads != 0) |
761 | { | |
762 | /* Set up PRELOADS with a vector of the preloaded libraries. */ | |
763 | struct link_map *l; | |
14bab8de UD |
764 | preloads = __alloca (npreloads * sizeof preloads[0]); |
765 | l = _dl_rtld_map.l_next; /* End of the chain before preloads. */ | |
766 | i = 0; | |
767 | do | |
768 | { | |
769 | preloads[i++] = l; | |
770 | l = l->l_next; | |
771 | } while (l); | |
772 | assert (i == npreloads); | |
773 | } | |
774 | ||
2064087b RM |
775 | /* Load all the libraries specified by DT_NEEDED entries. If LD_PRELOAD |
776 | specified some libraries to load, these are inserted before the actual | |
777 | dependencies in the executable's searchlist for symbol resolution. */ | |
db276fa1 | 778 | HP_TIMING_NOW (start); |
e3e35cfc | 779 | _dl_map_object_deps (_dl_loaded, preloads, npreloads, mode == trace, 0); |
db276fa1 UD |
780 | HP_TIMING_NOW (stop); |
781 | HP_TIMING_DIFF (diff, start, stop); | |
782 | HP_TIMING_ACCUM_NT (load_time, diff); | |
e3e35cfc UD |
783 | |
784 | /* Mark all objects as being in the global scope. */ | |
785 | for (i = _dl_loaded->l_searchlist.r_nlist; i > 0; ) | |
786 | _dl_loaded->l_searchlist.r_list[--i]->l_global = 1; | |
d66e34cd | 787 | |
2064087b | 788 | #ifndef MAP_ANON |
f332db02 RM |
789 | /* We are done mapping things, so close the zero-fill descriptor. */ |
790 | __close (_dl_zerofd); | |
791 | _dl_zerofd = -1; | |
2064087b | 792 | #endif |
f332db02 | 793 | |
f9496a7b RM |
794 | /* Remove _dl_rtld_map from the chain. */ |
795 | _dl_rtld_map.l_prev->l_next = _dl_rtld_map.l_next; | |
796 | if (_dl_rtld_map.l_next) | |
797 | _dl_rtld_map.l_next->l_prev = _dl_rtld_map.l_prev; | |
798 | ||
9a821cf9 | 799 | if (__builtin_expect (_dl_rtld_map.l_opencount, 2) > 1) |
0200214b | 800 | { |
f9496a7b RM |
801 | /* Some DT_NEEDED entry referred to the interpreter object itself, so |
802 | put it back in the list of visible objects. We insert it into the | |
803 | chain in symbol search order because gdb uses the chain's order as | |
804 | its symbol search order. */ | |
77aba05b | 805 | i = 1; |
be935610 | 806 | while (_dl_loaded->l_searchlist.r_list[i] != &_dl_rtld_map) |
f9496a7b | 807 | ++i; |
be935610 | 808 | _dl_rtld_map.l_prev = _dl_loaded->l_searchlist.r_list[i - 1]; |
b2bcd61a UD |
809 | if (__builtin_expect (mode, normal) == normal) |
810 | _dl_rtld_map.l_next = (i + 1 < _dl_loaded->l_searchlist.r_nlist | |
811 | ? _dl_loaded->l_searchlist.r_list[i + 1] | |
812 | : NULL); | |
813 | else | |
814 | /* In trace mode there might be an invisible object (which we | |
815 | could not find) after the previous one in the search list. | |
816 | In this case it doesn't matter much where we put the | |
817 | interpreter object, so we just initialize the list pointer so | |
818 | that the assertion below holds. */ | |
819 | _dl_rtld_map.l_next = _dl_rtld_map.l_prev->l_next; | |
820 | ||
f9496a7b RM |
821 | assert (_dl_rtld_map.l_prev->l_next == _dl_rtld_map.l_next); |
822 | _dl_rtld_map.l_prev->l_next = &_dl_rtld_map; | |
4d02a5b1 | 823 | if (_dl_rtld_map.l_next) |
f9496a7b RM |
824 | { |
825 | assert (_dl_rtld_map.l_next->l_prev == _dl_rtld_map.l_prev); | |
826 | _dl_rtld_map.l_next->l_prev = &_dl_rtld_map; | |
827 | } | |
0200214b | 828 | } |
d66e34cd | 829 | |
c84142e8 UD |
830 | /* Now let us see whether all libraries are available in the |
831 | versions we need. */ | |
832 | { | |
993b3242 UD |
833 | struct version_check_args args; |
834 | args.doexit = mode == normal; | |
993b3242 | 835 | _dl_receive_error (print_missing_version, version_check_doit, &args); |
c84142e8 UD |
836 | } |
837 | ||
9a821cf9 | 838 | if (__builtin_expect (mode, normal) != normal) |
0200214b RM |
839 | { |
840 | /* We were run just to list the shared libraries. It is | |
841 | important that we do this before real relocation, because the | |
842 | functions we call below for output may no longer work properly | |
843 | after relocation. */ | |
0200214b RM |
844 | if (! _dl_loaded->l_info[DT_NEEDED]) |
845 | _dl_sysdep_message ("\t", "statically linked\n", NULL); | |
846 | else | |
ceb2d9aa UD |
847 | { |
848 | struct link_map *l; | |
849 | ||
850 | for (l = _dl_loaded->l_next; l; l = l->l_next) | |
851 | if (l->l_opencount == 0) | |
852 | /* The library was not found. */ | |
853 | _dl_sysdep_message ("\t", l->l_libname->name, " => not found\n", | |
854 | NULL); | |
855 | else | |
856 | { | |
857 | char buf[20], *bp; | |
858 | buf[sizeof buf - 1] = '\0'; | |
af6f3906 | 859 | bp = _itoa_word (l->l_addr, &buf[sizeof buf - 1], 16, 0); |
ceb2d9aa UD |
860 | while ((size_t) (&buf[sizeof buf - 1] - bp) |
861 | < sizeof l->l_addr * 2) | |
862 | *--bp = '0'; | |
863 | _dl_sysdep_message ("\t", l->l_libname->name, " => ", | |
864 | l->l_name, " (0x", bp, ")\n", NULL); | |
865 | } | |
866 | } | |
1a3a58fd | 867 | |
9a821cf9 | 868 | if (__builtin_expect (mode, trace) != trace) |
cddcfecf RM |
869 | for (i = 1; i < _dl_argc; ++i) |
870 | { | |
871 | const ElfW(Sym) *ref = NULL; | |
d3ac2d47 UD |
872 | ElfW(Addr) loadbase = _dl_lookup_symbol (_dl_argv[i], _dl_loaded, |
873 | &ref, _dl_loaded->l_scope, | |
a2b08ee5 | 874 | ELF_MACHINE_JMP_SLOT); |
cddcfecf RM |
875 | char buf[20], *bp; |
876 | buf[sizeof buf - 1] = '\0'; | |
af6f3906 | 877 | bp = _itoa_word (ref->st_value, &buf[sizeof buf - 1], 16, 0); |
14bab8de | 878 | while ((size_t) (&buf[sizeof buf - 1] - bp) < sizeof loadbase * 2) |
cddcfecf RM |
879 | *--bp = '0'; |
880 | _dl_sysdep_message (_dl_argv[i], " found at 0x", bp, NULL); | |
881 | buf[sizeof buf - 1] = '\0'; | |
af6f3906 | 882 | bp = _itoa_word (loadbase, &buf[sizeof buf - 1], 16, 0); |
14bab8de | 883 | while ((size_t) (&buf[sizeof buf - 1] - bp) < sizeof loadbase * 2) |
cddcfecf RM |
884 | *--bp = '0'; |
885 | _dl_sysdep_message (" in object at 0x", bp, "\n", NULL); | |
886 | } | |
ce37fa88 | 887 | else |
fd26970f | 888 | { |
12b5b6b7 | 889 | if (_dl_lazy >= 0) |
ce37fa88 UD |
890 | { |
891 | /* We have to do symbol dependency testing. */ | |
892 | struct relocate_args args; | |
893 | struct link_map *l; | |
993b3242 | 894 | |
12b5b6b7 | 895 | args.lazy = _dl_lazy; |
fd26970f | 896 | |
ce37fa88 UD |
897 | l = _dl_loaded; |
898 | while (l->l_next) | |
899 | l = l->l_next; | |
900 | do | |
901 | { | |
902 | if (l != &_dl_rtld_map && l->l_opencount > 0) | |
903 | { | |
904 | args.l = l; | |
905 | _dl_receive_error (print_unresolved, relocate_doit, | |
906 | &args); | |
ce37fa88 UD |
907 | } |
908 | l = l->l_prev; | |
909 | } while (l); | |
910 | } | |
911 | ||
912 | #define VERNEEDTAG (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (DT_VERNEED)) | |
120b4c49 | 913 | if (version_info) |
fd26970f | 914 | { |
ce37fa88 UD |
915 | /* Print more information. This means here, print information |
916 | about the versions needed. */ | |
917 | int first = 1; | |
918 | struct link_map *map = _dl_loaded; | |
919 | ||
920 | for (map = _dl_loaded; map != NULL; map = map->l_next) | |
fd26970f | 921 | { |
f41c8091 | 922 | const char *strtab; |
ce37fa88 | 923 | ElfW(Dyn) *dyn = map->l_info[VERNEEDTAG]; |
f41c8091 UD |
924 | ElfW(Verneed) *ent; |
925 | ||
926 | if (dyn == NULL) | |
927 | continue; | |
928 | ||
f420344c | 929 | strtab = (const void *) map->l_info[DT_STRTAB]->d_un.d_ptr; |
f41c8091 | 930 | ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr); |
ce37fa88 | 931 | |
f41c8091 | 932 | if (first) |
ce37fa88 | 933 | { |
f41c8091 UD |
934 | _dl_sysdep_message ("\n\tVersion information:\n", NULL); |
935 | first = 0; | |
936 | } | |
ce37fa88 | 937 | |
f41c8091 UD |
938 | _dl_sysdep_message ("\t", (map->l_name[0] |
939 | ? map->l_name : _dl_argv[0]), | |
940 | ":\n", NULL); | |
941 | ||
942 | while (1) | |
943 | { | |
944 | ElfW(Vernaux) *aux; | |
945 | struct link_map *needed; | |
ce37fa88 | 946 | |
f41c8091 UD |
947 | needed = find_needed (strtab + ent->vn_file); |
948 | aux = (ElfW(Vernaux) *) ((char *) ent + ent->vn_aux); | |
ce37fa88 UD |
949 | |
950 | while (1) | |
951 | { | |
f41c8091 UD |
952 | const char *fname = NULL; |
953 | ||
954 | _dl_sysdep_message ("\t\t", | |
955 | strtab + ent->vn_file, | |
956 | " (", strtab + aux->vna_name, | |
957 | ") ", | |
958 | (aux->vna_flags | |
959 | & VER_FLG_WEAK | |
960 | ? "[WEAK] " : ""), | |
961 | "=> ", NULL); | |
962 | ||
963 | if (needed != NULL | |
964 | && match_version (strtab+aux->vna_name, needed)) | |
965 | fname = needed->l_name; | |
966 | ||
967 | _dl_sysdep_message (fname ?: "not found", "\n", | |
968 | NULL); | |
ce37fa88 | 969 | |
f41c8091 UD |
970 | if (aux->vna_next == 0) |
971 | /* No more symbols. */ | |
ce37fa88 UD |
972 | break; |
973 | ||
f41c8091 UD |
974 | /* Next symbol. */ |
975 | aux = (ElfW(Vernaux) *) ((char *) aux | |
976 | + aux->vna_next); | |
ce37fa88 | 977 | } |
f41c8091 UD |
978 | |
979 | if (ent->vn_next == 0) | |
980 | /* No more dependencies. */ | |
981 | break; | |
982 | ||
983 | /* Next dependency. */ | |
984 | ent = (ElfW(Verneed) *) ((char *) ent + ent->vn_next); | |
ce37fa88 | 985 | } |
fd26970f | 986 | } |
ce37fa88 | 987 | } |
fd26970f | 988 | } |
d66e34cd | 989 | |
0200214b RM |
990 | _exit (0); |
991 | } | |
86d2c878 | 992 | |
ba79d61b RM |
993 | { |
994 | /* Now we have all the objects loaded. Relocate them all except for | |
995 | the dynamic linker itself. We do this in reverse order so that copy | |
996 | relocs of earlier objects overwrite the data written by later | |
997 | objects. We do not re-relocate the dynamic linker itself in this | |
998 | loop because that could result in the GOT entries for functions we | |
999 | call being changed, and that would break us. It is safe to relocate | |
1000 | the dynamic linker out of order because it has no copy relocs (we | |
1001 | know that because it is self-contained). */ | |
1002 | ||
ceb2d9aa | 1003 | struct link_map *l; |
c0fb8a56 | 1004 | int consider_profiling = _dl_profile != NULL; |
db276fa1 UD |
1005 | hp_timing_t start; |
1006 | hp_timing_t stop; | |
1007 | hp_timing_t add; | |
c0fb8a56 UD |
1008 | |
1009 | /* If we are profiling we also must do lazy reloaction. */ | |
12b5b6b7 | 1010 | _dl_lazy |= consider_profiling; |
c0fb8a56 | 1011 | |
ba79d61b RM |
1012 | l = _dl_loaded; |
1013 | while (l->l_next) | |
1014 | l = l->l_next; | |
db276fa1 UD |
1015 | |
1016 | HP_TIMING_NOW (start); | |
ba79d61b RM |
1017 | do |
1018 | { | |
1019 | if (l != &_dl_rtld_map) | |
12b5b6b7 | 1020 | _dl_relocate_object (l, l->l_scope, _dl_lazy, consider_profiling); |
be935610 | 1021 | |
ba79d61b | 1022 | l = l->l_prev; |
db276fa1 UD |
1023 | } |
1024 | while (l); | |
1025 | HP_TIMING_NOW (stop); | |
1026 | ||
1027 | HP_TIMING_DIFF (relocate_time, start, stop); | |
ba79d61b RM |
1028 | |
1029 | /* Do any necessary cleanups for the startup OS interface code. | |
1030 | We do these now so that no calls are made after rtld re-relocation | |
1031 | which might be resolved to different functions than we expect. | |
1032 | We cannot do this before relocating the other objects because | |
1033 | _dl_relocate_object might need to call `mprotect' for DT_TEXTREL. */ | |
1034 | _dl_sysdep_start_cleanup (); | |
1035 | ||
722c33bb UD |
1036 | /* Now enable profiling if needed. Like the previous call, |
1037 | this has to go here because the calls it makes should use the | |
1038 | rtld versions of the functions (particularly calloc()), but it | |
1039 | needs to have _dl_profile_map set up by the relocator. */ | |
1040 | if (_dl_profile_map != NULL) | |
1041 | /* We must prepare the profiling. */ | |
1042 | _dl_start_profile (_dl_profile_map, _dl_profile_output); | |
1043 | ||
ba79d61b | 1044 | if (_dl_rtld_map.l_opencount > 0) |
db276fa1 UD |
1045 | { |
1046 | /* There was an explicit ref to the dynamic linker as a shared lib. | |
1047 | Re-relocate ourselves with user-controlled symbol definitions. */ | |
1048 | HP_TIMING_NOW (start); | |
1049 | _dl_relocate_object (&_dl_rtld_map, _dl_loaded->l_scope, 0, 0); | |
1050 | HP_TIMING_NOW (stop); | |
1051 | HP_TIMING_DIFF (add, start, stop); | |
1052 | HP_TIMING_ACCUM_NT (relocate_time, add); | |
1053 | } | |
ba79d61b | 1054 | } |
ac16e905 | 1055 | |
be935610 UD |
1056 | /* Now set up the variable which helps the assembler startup code. */ |
1057 | _dl_main_searchlist = &_dl_loaded->l_searchlist; | |
1058 | _dl_global_scope[0] = &_dl_loaded->l_searchlist; | |
1059 | ||
604510f7 UD |
1060 | /* Safe the information about the original global scope list since |
1061 | we need it in the memory handling later. */ | |
1062 | _dl_initial_searchlist = *_dl_main_searchlist; | |
1063 | ||
4d6acc61 RM |
1064 | { |
1065 | /* Initialize _r_debug. */ | |
1066 | struct r_debug *r = _dl_debug_initialize (_dl_rtld_map.l_addr); | |
ceb2d9aa | 1067 | struct link_map *l; |
4d6acc61 RM |
1068 | |
1069 | l = _dl_loaded; | |
ec42724d RM |
1070 | |
1071 | #ifdef ELF_MACHINE_DEBUG_SETUP | |
1072 | ||
1073 | /* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */ | |
1074 | ||
1075 | ELF_MACHINE_DEBUG_SETUP (l, r); | |
1076 | ELF_MACHINE_DEBUG_SETUP (&_dl_rtld_map, r); | |
1077 | ||
1078 | #else | |
1079 | ||
4d6acc61 RM |
1080 | if (l->l_info[DT_DEBUG]) |
1081 | /* There is a DT_DEBUG entry in the dynamic section. Fill it in | |
1082 | with the run-time address of the r_debug structure */ | |
1083 | l->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1084 | ||
d746b89c RM |
1085 | /* Fill in the pointer in the dynamic linker's own dynamic section, in |
1086 | case you run gdb on the dynamic linker directly. */ | |
1087 | if (_dl_rtld_map.l_info[DT_DEBUG]) | |
1088 | _dl_rtld_map.l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1089 | ||
ec42724d RM |
1090 | #endif |
1091 | ||
4d6acc61 RM |
1092 | /* Notify the debugger that all objects are now mapped in. */ |
1093 | r->r_state = RT_ADD; | |
1094 | _dl_debug_state (); | |
1095 | } | |
0200214b | 1096 | |
08cac4ac UD |
1097 | #ifndef MAP_COPY |
1098 | /* We must munmap() the cache file. */ | |
1099 | _dl_unload_cache (); | |
1100 | #endif | |
1101 | ||
d66e34cd RM |
1102 | /* Once we return, _dl_sysdep_start will invoke |
1103 | the DT_INIT functions and then *USER_ENTRY. */ | |
1104 | } | |
fd26970f UD |
1105 | \f |
1106 | /* This is a little helper function for resolving symbols while | |
1107 | tracing the binary. */ | |
1108 | static void | |
c84142e8 UD |
1109 | print_unresolved (int errcode __attribute__ ((unused)), const char *objname, |
1110 | const char *errstring) | |
fd26970f | 1111 | { |
3996f34b UD |
1112 | if (objname[0] == '\0') |
1113 | objname = _dl_argv[0] ?: "<main program>"; | |
fd26970f UD |
1114 | _dl_sysdep_error (errstring, " (", objname, ")\n", NULL); |
1115 | } | |
c84142e8 UD |
1116 | \f |
1117 | /* This is a little helper function for resolving symbols while | |
1118 | tracing the binary. */ | |
1119 | static void | |
1120 | print_missing_version (int errcode __attribute__ ((unused)), | |
1121 | const char *objname, const char *errstring) | |
1122 | { | |
1123 | _dl_sysdep_error (_dl_argv[0] ?: "<program name unknown>", ": ", | |
1124 | objname, ": ", errstring, "\n", NULL); | |
1125 | } | |
ea278354 | 1126 | \f |
7dea968e UD |
1127 | /* Nonzero if any of the debugging options is enabled. */ |
1128 | static int any_debug; | |
1129 | ||
b5efde2f UD |
1130 | /* Process the string given as the parameter which explains which debugging |
1131 | options are enabled. */ | |
1132 | static void | |
14c44e2e | 1133 | process_dl_debug (const char *dl_debug) |
b5efde2f | 1134 | { |
14c44e2e UD |
1135 | size_t len; |
1136 | #define separators " ,:" | |
b5efde2f UD |
1137 | do |
1138 | { | |
14c44e2e | 1139 | len = 0; |
b5efde2f | 1140 | /* Skip separating white spaces and commas. */ |
14c44e2e | 1141 | dl_debug += strspn (dl_debug, separators); |
b5efde2f UD |
1142 | if (*dl_debug != '\0') |
1143 | { | |
14c44e2e UD |
1144 | len = strcspn (dl_debug, separators); |
1145 | ||
1146 | switch (len) | |
b5efde2f | 1147 | { |
b0b67c47 UD |
1148 | case 3: |
1149 | /* This option is not documented since it is not generally | |
1150 | useful. */ | |
1151 | if (memcmp (dl_debug, "all", 3) == 0) | |
1152 | { | |
1153 | _dl_debug_libs = 1; | |
1154 | _dl_debug_impcalls = 1; | |
1155 | _dl_debug_reloc = 1; | |
1156 | _dl_debug_files = 1; | |
1157 | _dl_debug_symbols = 1; | |
1158 | _dl_debug_bindings = 1; | |
1159 | _dl_debug_versions = 1; | |
1160 | any_debug = 1; | |
ceb27555 | 1161 | continue; |
b0b67c47 UD |
1162 | } |
1163 | break; | |
1164 | ||
14c44e2e UD |
1165 | case 4: |
1166 | if (memcmp (dl_debug, "help", 4) == 0) | |
1167 | { | |
1168 | _dl_sysdep_message ("\ | |
08b511e6 | 1169 | Valid options for the LD_DEBUG environment variable are:\n\ |
b5efde2f | 1170 | \n\ |
0c367d92 | 1171 | bindings display information about symbol binding\n\ |
8193034b | 1172 | files display processing of files and libraries\n\ |
0c367d92 UD |
1173 | help display this help message and exit\n\ |
1174 | libs display library search paths\n\ | |
8193034b | 1175 | reloc display relocation processing\n\ |
de100ca7 | 1176 | symbols display symbol table processing\n\ |
8193034b | 1177 | versions display version dependencies\n\ |
0c367d92 UD |
1178 | \n\ |
1179 | To direct the debugging output into a file instead of standard output\n\ | |
1180 | a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n", | |
1181 | NULL); | |
14c44e2e UD |
1182 | _exit (0); |
1183 | } | |
77aba05b | 1184 | |
14c44e2e UD |
1185 | if (memcmp (dl_debug, "libs", 4) == 0) |
1186 | { | |
1187 | _dl_debug_libs = 1; | |
1188 | _dl_debug_impcalls = 1; | |
1189 | any_debug = 1; | |
1190 | continue; | |
1191 | } | |
1192 | break; | |
1193 | ||
1194 | case 5: | |
1195 | if (memcmp (dl_debug, "reloc", 5) == 0) | |
1196 | { | |
1197 | _dl_debug_reloc = 1; | |
1198 | _dl_debug_impcalls = 1; | |
1199 | any_debug = 1; | |
1200 | continue; | |
1201 | } | |
1202 | ||
1203 | if (memcmp (dl_debug, "files", 5) == 0) | |
1204 | { | |
1205 | _dl_debug_files = 1; | |
1206 | _dl_debug_impcalls = 1; | |
1207 | any_debug = 1; | |
1208 | continue; | |
1209 | } | |
1210 | break; | |
77aba05b | 1211 | |
14c44e2e UD |
1212 | case 7: |
1213 | if (memcmp (dl_debug, "symbols", 7) == 0) | |
1214 | { | |
1215 | _dl_debug_symbols = 1; | |
1216 | _dl_debug_impcalls = 1; | |
1217 | any_debug = 1; | |
1218 | continue; | |
1219 | } | |
1220 | break; | |
77aba05b | 1221 | |
14c44e2e UD |
1222 | case 8: |
1223 | if (memcmp (dl_debug, "bindings", 8) == 0) | |
1224 | { | |
1225 | _dl_debug_bindings = 1; | |
1226 | _dl_debug_impcalls = 1; | |
1227 | any_debug = 1; | |
1228 | continue; | |
1229 | } | |
1230 | ||
1231 | if (memcmp (dl_debug, "versions", 8) == 0) | |
1232 | { | |
1233 | _dl_debug_versions = 1; | |
1234 | _dl_debug_impcalls = 1; | |
1235 | any_debug = 1; | |
1236 | continue; | |
1237 | } | |
1238 | break; | |
1239 | ||
db276fa1 UD |
1240 | case 10: |
1241 | if (memcmp (dl_debug, "statistics", 10) == 0) | |
1242 | { | |
1243 | _dl_debug_statistics = 1; | |
1244 | continue; | |
1245 | } | |
1246 | break; | |
1247 | ||
14c44e2e UD |
1248 | default: |
1249 | break; | |
77aba05b | 1250 | } |
14c44e2e UD |
1251 | |
1252 | { | |
1253 | /* Display a warning and skip everything until next separator. */ | |
1254 | char *startp = strndupa (dl_debug, len); | |
1255 | _dl_sysdep_error ("warning: debug option `", startp, | |
1256 | "' unknown; try LD_DEBUG=help\n", NULL); | |
db276fa1 | 1257 | break; |
14c44e2e | 1258 | } |
b5efde2f UD |
1259 | } |
1260 | } | |
14c44e2e | 1261 | while (*(dl_debug += len) != '\0'); |
b5efde2f UD |
1262 | } |
1263 | \f | |
ea278354 UD |
1264 | /* Process all environments variables the dynamic linker must recognize. |
1265 | Since all of them start with `LD_' we are a bit smarter while finding | |
1266 | all the entries. */ | |
1267 | static void | |
1268 | process_envvars (enum mode *modep, int *lazyp) | |
1269 | { | |
1270 | char **runp = NULL; | |
1271 | char *envline; | |
1272 | enum mode mode = normal; | |
1273 | int bind_now = 0; | |
7dea968e | 1274 | char *debug_output = NULL; |
ea278354 UD |
1275 | |
1276 | /* This is the default place for profiling data file. */ | |
1277 | _dl_profile_output = "/var/tmp"; | |
1278 | ||
1279 | while ((envline = _dl_next_ld_env_entry (&runp)) != NULL) | |
1280 | { | |
14c44e2e | 1281 | size_t len = strcspn (envline, "=") - 3; |
ea278354 | 1282 | |
14c44e2e | 1283 | switch (len) |
ea278354 | 1284 | { |
14c44e2e UD |
1285 | case 4: |
1286 | /* Warning level, verbose or not. */ | |
1287 | if (memcmp (&envline[3], "WARN", 4) == 0) | |
1288 | _dl_verbose = envline[8] != '\0'; | |
1289 | break; | |
ea278354 | 1290 | |
14c44e2e UD |
1291 | case 5: |
1292 | /* Debugging of the dynamic linker? */ | |
1293 | if (memcmp (&envline[3], "DEBUG", 5) == 0) | |
1294 | process_dl_debug (&envline[9]); | |
1295 | break; | |
b5efde2f | 1296 | |
14c44e2e UD |
1297 | case 7: |
1298 | /* Print information about versions. */ | |
1299 | if (memcmp (&envline[3], "VERBOSE", 7) == 0) | |
1300 | { | |
1301 | version_info = envline[11] != '\0'; | |
1302 | break; | |
1303 | } | |
7dea968e | 1304 | |
14c44e2e UD |
1305 | /* List of objects to be preloaded. */ |
1306 | if (memcmp (&envline[3], "PRELOAD", 7) == 0) | |
1307 | { | |
1308 | preloadlist = &envline[11]; | |
1309 | break; | |
1310 | } | |
120b4c49 | 1311 | |
14c44e2e UD |
1312 | /* Which shared object shall be profiled. */ |
1313 | if (memcmp (&envline[3], "PROFILE", 7) == 0) | |
722c33bb | 1314 | _dl_profile = &envline[11]; |
14c44e2e | 1315 | break; |
120b4c49 | 1316 | |
14c44e2e UD |
1317 | case 8: |
1318 | /* Do we bind early? */ | |
0e103c6d UD |
1319 | if (memcmp (&envline[3], "BIND_NOW", 8) == 0) |
1320 | bind_now = envline[12] != '\0'; | |
14c44e2e | 1321 | break; |
ea278354 | 1322 | |
14c44e2e UD |
1323 | case 9: |
1324 | /* Test whether we want to see the content of the auxiliary | |
1325 | array passed up from the kernel. */ | |
1326 | if (memcmp (&envline[3], "SHOW_AUXV", 9) == 0) | |
1327 | _dl_show_auxv (); | |
1328 | break; | |
ea278354 | 1329 | |
12264bd7 | 1330 | case 10: |
3081378b | 1331 | /* Mask for the important hardware capabilities. */ |
12264bd7 UD |
1332 | if (memcmp (&envline[3], "HWCAP_MASK", 10) == 0) |
1333 | _dl_hwcap_mask = strtoul (&envline[14], NULL, 0); | |
1334 | break; | |
1335 | ||
f787edde UD |
1336 | case 11: |
1337 | /* Path where the binary is found. */ | |
45769315 UD |
1338 | if (!__libc_enable_secure |
1339 | && memcmp (&envline[3], "ORIGIN_PATH", 11) == 0) | |
997a4165 | 1340 | _dl_origin_path = &envline[15]; |
f787edde UD |
1341 | break; |
1342 | ||
14c44e2e UD |
1343 | case 12: |
1344 | /* Where to place the profiling data file. */ | |
1345 | if (memcmp (&envline[3], "DEBUG_OUTPUT", 12) == 0) | |
1346 | { | |
1347 | debug_output = &envline[16]; | |
1348 | break; | |
1349 | } | |
ea278354 | 1350 | |
14c44e2e UD |
1351 | /* The library search path. */ |
1352 | if (memcmp (&envline[3], "LIBRARY_PATH", 12) == 0) | |
1353 | library_path = &envline[16]; | |
1354 | break; | |
ea278354 | 1355 | |
14c44e2e UD |
1356 | case 14: |
1357 | /* Where to place the profiling data file. */ | |
3081378b UD |
1358 | if (!__libc_enable_secure |
1359 | && memcmp (&envline[3], "PROFILE_OUTPUT", 14) == 0) | |
14c44e2e UD |
1360 | { |
1361 | _dl_profile_output = &envline[18]; | |
1362 | if (*_dl_profile_output == '\0') | |
1363 | _dl_profile_output = "/var/tmp"; | |
1364 | } | |
1365 | break; | |
120b4c49 | 1366 | |
14c44e2e UD |
1367 | case 20: |
1368 | /* The mode of the dynamic linker can be set. */ | |
1369 | if (memcmp (&envline[3], "TRACE_LOADED_OBJECTS", 20) == 0) | |
1370 | mode = trace; | |
1371 | break; | |
e2102c14 UD |
1372 | |
1373 | /* We might have some extra environment variable to handle. This | |
1374 | is tricky due to the pre-processing of the length of the name | |
1375 | in the switch statement here. The code here assumes that added | |
1376 | environment variables have a different length. */ | |
1377 | #ifdef EXTRA_LD_ENVVARS | |
1378 | EXTRA_LD_ENVVARS | |
1379 | #endif | |
ea278354 UD |
1380 | } |
1381 | } | |
1382 | ||
4bae5567 UD |
1383 | /* Extra security for SUID binaries. Remove all dangerous environment |
1384 | variables. */ | |
1385 | if (__libc_enable_secure) | |
1386 | { | |
1387 | static const char *unsecure_envvars[] = | |
1388 | { | |
1389 | #ifdef EXTRA_UNSECURE_ENVVARS | |
1390 | EXTRA_UNSECURE_ENVVARS | |
1391 | #endif | |
1392 | }; | |
1393 | size_t cnt; | |
1394 | ||
1395 | if (preloadlist != NULL) | |
1396 | unsetenv ("LD_PRELOAD"); | |
1397 | if (library_path != NULL) | |
1398 | unsetenv ("LD_LIBRARY_PATH"); | |
722c33bb UD |
1399 | if (_dl_origin_path != NULL) |
1400 | unsetenv ("LD_ORIGIN_PATH"); | |
1401 | if (debug_output != NULL) | |
1402 | unsetenv ("LD_DEBUG_OUTPUT"); | |
1403 | if (_dl_profile != NULL) | |
1404 | unsetenv ("LD_PROFILE"); | |
4bae5567 UD |
1405 | |
1406 | for (cnt = 0; | |
1407 | cnt < sizeof (unsecure_envvars) / sizeof (unsecure_envvars[0]); | |
1408 | ++cnt) | |
1409 | unsetenv (unsecure_envvars[cnt]); | |
1410 | } | |
1411 | ||
722c33bb UD |
1412 | /* The name of the object to profile cannot be empty. */ |
1413 | if (_dl_profile != NULL && *_dl_profile == '\0') | |
1414 | _dl_profile = NULL; | |
1415 | ||
7dea968e UD |
1416 | /* If we have to run the dynamic linker in debugging mode and the |
1417 | LD_DEBUG_OUTPUT environment variable is given, we write the debug | |
1418 | messages to this file. */ | |
14c44e2e | 1419 | if (any_debug && debug_output != NULL && !__libc_enable_secure) |
7dea968e | 1420 | { |
7a2fd787 UD |
1421 | size_t name_len = strlen (debug_output); |
1422 | char buf[name_len + 12]; | |
1423 | char *startp; | |
1424 | ||
1425 | buf[name_len + 11] = '\0'; | |
1426 | startp = _itoa_word (__getpid (), &buf[name_len + 11], 10, 0); | |
1427 | *--startp = '.'; | |
1428 | startp = memcpy (startp - name_len, debug_output, name_len); | |
1429 | ||
1430 | _dl_debug_fd = __open (startp, O_WRONLY | O_APPEND | O_CREAT, 0666); | |
7dea968e UD |
1431 | if (_dl_debug_fd == -1) |
1432 | /* We use standard output if opening the file failed. */ | |
1433 | _dl_debug_fd = STDOUT_FILENO; | |
1434 | } | |
1435 | ||
ea278354 UD |
1436 | /* LAZY is determined by the environment variable LD_WARN and |
1437 | LD_BIND_NOW if we trace the binary. */ | |
9a821cf9 | 1438 | if (__builtin_expect (mode, normal) == trace) |
ea278354 UD |
1439 | *lazyp = _dl_verbose ? !bind_now : -1; |
1440 | else | |
57de5037 | 1441 | *lazyp = !bind_now; |
ea278354 UD |
1442 | |
1443 | *modep = mode; | |
1444 | } | |
db276fa1 UD |
1445 | |
1446 | ||
1447 | /* Print the various times we collected. */ | |
1448 | static void | |
1449 | print_statistics (void) | |
1450 | { | |
1451 | char buf[200]; | |
1452 | char *cp; | |
1453 | char *wp; | |
1454 | ||
1455 | /* Total time rtld used. */ | |
1456 | if (HP_TIMING_AVAIL) | |
1457 | { | |
1458 | HP_TIMING_PRINT (buf, sizeof (buf), rtld_total_time); | |
1459 | _dl_debug_message (1, "\nruntime linker statistics:\n" | |
1460 | " total startup time in dynamic loader: ", | |
1461 | buf, "\n", NULL); | |
1462 | } | |
1463 | ||
1464 | /* Print relocation statistics. */ | |
1465 | if (HP_TIMING_AVAIL) | |
1466 | { | |
1467 | HP_TIMING_PRINT (buf, sizeof (buf), relocate_time); | |
1468 | _dl_debug_message (1, " time needed for relocation: ", buf, | |
1469 | NULL); | |
1470 | cp = _itoa_word ((1000 * relocate_time) / rtld_total_time, | |
1471 | buf + sizeof (buf), 10, 0); | |
1472 | wp = buf; | |
1473 | switch (buf + sizeof (buf) - cp) | |
1474 | { | |
1475 | case 3: | |
1476 | *wp++ = *cp++; | |
1477 | case 2: | |
1478 | *wp++ = *cp++; | |
1479 | case 1: | |
1480 | *wp++ = '.'; | |
1481 | *wp++ = *cp++; | |
1482 | } | |
1483 | *wp = '\0'; | |
1484 | _dl_debug_message (0, " (", buf, "%)\n", NULL); | |
1485 | } | |
1486 | ||
1487 | buf[sizeof (buf) - 1] = '\0'; | |
1488 | _dl_debug_message (1, " number of relocations: ", | |
1489 | _itoa_word (_dl_num_relocations, | |
1490 | buf + sizeof (buf) - 1, 10, 0), | |
1491 | "\n", NULL); | |
1492 | ||
1493 | /* Time spend while loading the object and the dependencies. */ | |
1494 | if (HP_TIMING_AVAIL) | |
1495 | { | |
1496 | HP_TIMING_PRINT (buf, sizeof (buf), load_time); | |
1497 | _dl_debug_message (1, " time needed to load objects: ", buf, | |
1498 | NULL); | |
1499 | cp = _itoa_word ((1000 * load_time) / rtld_total_time, | |
1500 | buf + sizeof (buf), 10, 0); | |
1501 | wp = buf; | |
1502 | switch (buf + sizeof (buf) - cp) | |
1503 | { | |
1504 | case 3: | |
1505 | *wp++ = *cp++; | |
1506 | case 2: | |
1507 | *wp++ = *cp++; | |
1508 | case 1: | |
1509 | *wp++ = '.'; | |
1510 | *wp++ = *cp++; | |
1511 | } | |
1512 | *wp = '\0'; | |
1513 | _dl_debug_message (0, " (", buf, "%)\n", NULL); | |
1514 | } | |
1515 | } |