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d66e34cd | 1 | /* Run time dynamic linker. |
e66d0a4c | 2 | Copyright (C) 1995-1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
afd4eb37 | 3 | This file is part of the GNU C Library. |
d66e34cd | 4 | |
afd4eb37 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the 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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
d66e34cd | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
d66e34cd | 19 | |
7dea968e | 20 | #include <fcntl.h> |
164a7164 | 21 | #include <stdbool.h> |
d66e34cd | 22 | #include <stdlib.h> |
f51d1dfd | 23 | #include <string.h> |
d66e34cd | 24 | #include <unistd.h> |
2064087b | 25 | #include <sys/mman.h> /* Check if MAP_ANON is defined. */ |
af8bf6bd | 26 | #include <sys/param.h> |
ba9fcb3f | 27 | #include <sys/stat.h> |
a42195db | 28 | #include <ldsodefs.h> |
ce37fa88 | 29 | #include <stdio-common/_itoa.h> |
f21acc89 | 30 | #include <entry.h> |
c94a8080 | 31 | #include <fpu_control.h> |
db276fa1 | 32 | #include <hp-timing.h> |
cf197e41 | 33 | #include <bits/libc-lock.h> |
f5348425 | 34 | #include "dynamic-link.h" |
e2102c14 | 35 | #include "dl-librecon.h" |
74955460 | 36 | #include <unsecvars.h> |
5688da55 UD |
37 | #include <dl-cache.h> |
38 | #include <dl-procinfo.h> | |
f5348425 | 39 | |
a853022c | 40 | #include <assert.h> |
f5348425 | 41 | |
fd26970f | 42 | /* Helper function to handle errors while resolving symbols. */ |
c84142e8 UD |
43 | static void print_unresolved (int errcode, const char *objname, |
44 | const char *errsting); | |
45 | ||
46 | /* Helper function to handle errors when a version is missing. */ | |
47 | static void print_missing_version (int errcode, const char *objname, | |
48 | const char *errsting); | |
fd26970f | 49 | |
db276fa1 UD |
50 | /* Print the various times we collected. */ |
51 | static void print_statistics (void); | |
ea278354 UD |
52 | |
53 | /* This is a list of all the modes the dynamic loader can be in. */ | |
54 | enum mode { normal, list, verify, trace }; | |
55 | ||
56 | /* Process all environments variables the dynamic linker must recognize. | |
57 | Since all of them start with `LD_' we are a bit smarter while finding | |
58 | all the entries. */ | |
ba9fcb3f | 59 | static void process_envvars (enum mode *modep); |
ea278354 | 60 | |
d66e34cd RM |
61 | int _dl_argc; |
62 | char **_dl_argv; | |
ceb27555 | 63 | unsigned int _dl_skip_args; /* Nonzero if we were run directly. */ |
cf197e41 | 64 | |
39778c6c UD |
65 | /* Set nonzero during loading and initialization of executable and |
66 | libraries, cleared before the executable's entry point runs. This | |
67 | must not be initialized to nonzero, because the unused dynamic | |
68 | linker loaded in for libc.so's "ld.so.1" dep will provide the | |
69 | definition seen by libc.so's initializer; that value must be zero, | |
70 | and will be since that dynamic linker's _dl_start and dl_main will | |
71 | never be called. */ | |
72 | int _dl_starting_up; | |
73 | ||
d6b5d570 UD |
74 | /* This is the structure which defines all variables global to ld.so |
75 | (except those which cannot be added for some reason). */ | |
5688da55 UD |
76 | struct rtld_global _rtld_global = |
77 | { | |
ccdf0cab UD |
78 | /* Get architecture specific initializer. */ |
79 | #include <dl-procinfo.c> | |
5688da55 UD |
80 | ._dl_debug_fd = STDERR_FILENO, |
81 | #if 1 | |
82 | /* XXX I know about at least one case where we depend on the old | |
83 | weak behavior (it has to do with librt). Until we get DSO | |
84 | groups implemented we have to make this the default. | |
85 | Bummer. --drepper */ | |
86 | ._dl_dynamic_weak = 1, | |
87 | #endif | |
88 | ._dl_lazy = 1, | |
89 | ._dl_fpu_control = _FPU_DEFAULT, | |
90 | ._dl_correct_cache_id = _DL_CACHE_DEFAULT_ID, | |
91 | ._dl_hwcap_mask = HWCAP_IMPORTANT, | |
92 | ._dl_load_lock = _LIBC_LOCK_RECURSIVE_INITIALIZER | |
93 | }; | |
94 | /* There must only be the definition in ld.so itself. */ | |
95 | #ifdef HAVE_PROTECTED | |
96 | asm (".protected _rtld_global"); | |
97 | #endif | |
d6b5d570 | 98 | |
c0fb8a56 | 99 | |
67ddea92 | 100 | static void dl_main (const ElfW(Phdr) *phdr, ElfW(Word) phnum, |
266180eb | 101 | ElfW(Addr) *user_entry); |
d66e34cd | 102 | |
d6b5d570 UD |
103 | static struct libname_list _dl_rtld_libname; |
104 | static struct libname_list _dl_rtld_libname2; | |
86d2c878 | 105 | |
eaad82e0 UD |
106 | /* We expect less than a second for relocation. */ |
107 | #ifdef HP_SMALL_TIMING_AVAIL | |
108 | # undef HP_TIMING_AVAIL | |
109 | # define HP_TIMING_AVAIL HP_SMALL_TIMING_AVAIL | |
110 | #endif | |
111 | ||
db276fa1 | 112 | /* Variable for statistics. */ |
5732c4df | 113 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
114 | static hp_timing_t rtld_total_time; |
115 | static hp_timing_t relocate_time; | |
116 | static hp_timing_t load_time; | |
5732c4df | 117 | #endif |
db276fa1 | 118 | |
6a1db4ff UD |
119 | static ElfW(Addr) _dl_start_final (void *arg, struct link_map *bootstrap_map_p, |
120 | hp_timing_t start_time); | |
121 | ||
b1dbbaa4 RM |
122 | #ifdef RTLD_START |
123 | RTLD_START | |
124 | #else | |
eaad82e0 | 125 | # error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START" |
b1dbbaa4 RM |
126 | #endif |
127 | ||
50746436 | 128 | static ElfW(Addr) __attribute_used__ internal_function |
d66e34cd RM |
129 | _dl_start (void *arg) |
130 | { | |
86d2c878 | 131 | struct link_map bootstrap_map; |
db276fa1 | 132 | hp_timing_t start_time; |
d555194c | 133 | #ifndef HAVE_BUILTIN_MEMSET |
264ec183 | 134 | size_t cnt; |
1b4575ae | 135 | #endif |
d66e34cd | 136 | |
b1dbbaa4 RM |
137 | /* This #define produces dynamic linking inline functions for |
138 | bootstrap relocation instead of general-purpose relocation. */ | |
139 | #define RTLD_BOOTSTRAP | |
c0282c06 UD |
140 | #define RESOLVE_MAP(sym, version, flags) \ |
141 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : &bootstrap_map) | |
50463d27 UD |
142 | #define RESOLVE(sym, version, flags) \ |
143 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : bootstrap_map.l_addr) | |
b1dbbaa4 RM |
144 | #include "dynamic-link.h" |
145 | ||
db276fa1 UD |
146 | if (HP_TIMING_INLINE && HP_TIMING_AVAIL) |
147 | HP_TIMING_NOW (start_time); | |
148 | ||
e66d0a4c UD |
149 | /* Partly clean the `bootstrap_map' structure up. Don't use |
150 | `memset' since it might not be built in or inlined and we cannot | |
151 | make function calls at this point. Use '__builtin_memset' if we | |
152 | know it is available. */ | |
d555194c | 153 | #ifdef HAVE_BUILTIN_MEMSET |
e66d0a4c UD |
154 | __builtin_memset (bootstrap_map.l_info, '\0', sizeof (bootstrap_map.l_info)); |
155 | #else | |
264ec183 UD |
156 | for (cnt = 0; |
157 | cnt < sizeof (bootstrap_map.l_info) / sizeof (bootstrap_map.l_info[0]); | |
158 | ++cnt) | |
159 | bootstrap_map.l_info[cnt] = 0; | |
e66d0a4c | 160 | #endif |
264ec183 | 161 | |
d66e34cd | 162 | /* Figure out the run-time load address of the dynamic linker itself. */ |
86d2c878 | 163 | bootstrap_map.l_addr = elf_machine_load_address (); |
d66e34cd | 164 | |
47707456 UD |
165 | /* Read our own dynamic section and fill in the info array. */ |
166 | bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic (); | |
d3ac2d47 | 167 | elf_get_dynamic_info (&bootstrap_map); |
d66e34cd RM |
168 | |
169 | #ifdef ELF_MACHINE_BEFORE_RTLD_RELOC | |
86d2c878 | 170 | ELF_MACHINE_BEFORE_RTLD_RELOC (bootstrap_map.l_info); |
d66e34cd RM |
171 | #endif |
172 | ||
32e6df36 UD |
173 | if (bootstrap_map.l_addr || ! bootstrap_map.l_info[VALIDX(DT_GNU_PRELINKED)]) |
174 | { | |
175 | /* Relocate ourselves so we can do normal function calls and | |
176 | data access using the global offset table. */ | |
177 | ||
178 | ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0); | |
179 | } | |
421f82e5 | 180 | |
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. */ | |
c0282c06 UD |
191 | { |
192 | ElfW(Addr) entry = _dl_start_final (arg, &bootstrap_map, start_time); | |
193 | ||
194 | #ifndef ELF_MACHINE_START_ADDRESS | |
195 | # define ELF_MACHINE_START_ADDRESS(map, start) (start) | |
196 | #endif | |
197 | ||
d6b5d570 | 198 | return ELF_MACHINE_START_ADDRESS (GL(dl_loaded), entry); |
c0282c06 | 199 | } |
6a1db4ff UD |
200 | } |
201 | ||
202 | ||
32e6df36 UD |
203 | #ifndef VALIDX |
204 | # define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ | |
205 | + DT_EXTRANUM + DT_VALTAGIDX (tag)) | |
206 | #endif | |
207 | #ifndef ADDRIDX | |
208 | # define ADDRIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ | |
209 | + DT_EXTRANUM + DT_VALNUM + DT_ADDRTAGIDX (tag)) | |
210 | #endif | |
211 | ||
6a1db4ff UD |
212 | static ElfW(Addr) |
213 | _dl_start_final (void *arg, struct link_map *bootstrap_map_p, | |
214 | hp_timing_t start_time) | |
215 | { | |
216 | /* The use of `alloca' here looks ridiculous but it helps. The goal | |
217 | is to avoid the function from being inlined. There is no official | |
218 | way to do this so we use this trick. gcc never inlines functions | |
219 | which use `alloca'. */ | |
220 | ElfW(Addr) *start_addr = alloca (sizeof (ElfW(Addr))); | |
32e6df36 | 221 | extern char _begin[], _end[]; |
535b764d UD |
222 | #ifdef USE_TLS |
223 | ElfW(Ehdr) *ehdr; | |
224 | ElfW(Phdr) *phdr; | |
225 | size_t cnt; | |
535b764d UD |
226 | dtv_t initdtv[2]; |
227 | #endif | |
d66e34cd | 228 | |
db276fa1 UD |
229 | if (HP_TIMING_AVAIL) |
230 | { | |
231 | /* If it hasn't happen yet record the startup time. */ | |
232 | if (! HP_TIMING_INLINE) | |
233 | HP_TIMING_NOW (start_time); | |
234 | ||
235 | /* Initialize the timing functions. */ | |
236 | HP_TIMING_DIFF_INIT (); | |
237 | } | |
238 | ||
86d2c878 | 239 | /* Transfer data about ourselves to the permanent link_map structure. */ |
d6b5d570 UD |
240 | GL(dl_rtld_map).l_addr = bootstrap_map_p->l_addr; |
241 | GL(dl_rtld_map).l_ld = bootstrap_map_p->l_ld; | |
242 | GL(dl_rtld_map).l_opencount = 1; | |
243 | memcpy (GL(dl_rtld_map).l_info, bootstrap_map_p->l_info, | |
244 | sizeof GL(dl_rtld_map).l_info); | |
245 | _dl_setup_hash (&GL(dl_rtld_map)); | |
246 | GL(dl_rtld_map).l_mach = bootstrap_map_p->l_mach; | |
247 | GL(dl_rtld_map).l_map_start = (ElfW(Addr)) _begin; | |
248 | GL(dl_rtld_map).l_map_end = (ElfW(Addr)) _end; | |
052b6a6c | 249 | |
67ddea92 UD |
250 | #if HP_TIMING_AVAIL |
251 | HP_TIMING_NOW (GL(dl_cpuclock_offset)); | |
252 | #endif | |
253 | ||
535b764d UD |
254 | #if USE_TLS |
255 | /* Get the dynamic linkers program header. */ | |
47536120 UD |
256 | ehdr = (ElfW(Ehdr) *) GL(dl_rtld_map).l_map_start; |
257 | phdr = (ElfW(Phdr) *) (GL(dl_rtld_map).l_map_start + ehdr->e_phoff); | |
535b764d UD |
258 | for (cnt = 0; cnt < ehdr->e_phnum; ++cnt) |
259 | if (phdr[cnt].p_type == PT_TLS) | |
260 | { | |
5d6feea8 | 261 | void *tlsblock; |
3fb55878 | 262 | size_t max_align = MAX (TLS_INIT_TCB_ALIGN, phdr[cnt].p_align); |
535b764d | 263 | |
5d6feea8 | 264 | GL(dl_rtld_map).l_tls_blocksize = phdr[cnt].p_memsz; |
3fb55878 UD |
265 | GL(dl_rtld_map).l_tls_align = phdr[cnt].p_align; |
266 | assert (GL(dl_rtld_map).l_tls_blocksize != 0); | |
5d6feea8 | 267 | GL(dl_rtld_map).l_tls_initimage_size = phdr[cnt].p_filesz; |
37d8b778 | 268 | GL(dl_rtld_map).l_tls_initimage = (void *) (GL(dl_rtld_map).l_map_start |
5d6feea8 | 269 | + phdr[cnt].p_offset); |
535b764d UD |
270 | |
271 | /* We can now allocate the initial TLS block. This can happen | |
272 | on the stack. We'll get the final memory later when we | |
273 | know all about the various objects loaded at startup | |
274 | time. */ | |
275 | # if TLS_TCB_AT_TP | |
5d6feea8 UD |
276 | tlsblock = alloca (roundup (GL(dl_rtld_map).l_tls_blocksize, |
277 | TLS_INIT_TCB_ALIGN) | |
535b764d | 278 | + TLS_INIT_TCB_SIZE |
3fb55878 | 279 | + max_align); |
535b764d | 280 | # elif TLS_DTV_AT_TP |
3fb55878 UD |
281 | tlsblock = alloca (roundup (TLS_INIT_TCB_SIZE, |
282 | GL(dl_rtld_map).l_tls_align) | |
5d6feea8 | 283 | + GL(dl_rtld_map).l_tls_blocksize |
3fb55878 | 284 | + max_align); |
535b764d UD |
285 | # else |
286 | /* In case a model with a different layout for the TCB and DTV | |
287 | is defined add another #elif here and in the following #ifs. */ | |
288 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
289 | # endif | |
290 | /* Align the TLS block. */ | |
3fb55878 UD |
291 | tlsblock = (void *) (((uintptr_t) tlsblock + max_align - 1) |
292 | & ~(max_align - 1)); | |
535b764d UD |
293 | |
294 | /* Initialize the dtv. */ | |
295 | initdtv[0].counter = 1; | |
296 | ||
297 | /* Initialize the TLS block. */ | |
298 | # if TLS_TCB_AT_TP | |
299 | initdtv[1].pointer = tlsblock; | |
300 | # elif TLS_DTV_AT_TP | |
5d6feea8 | 301 | GL(dl_rtld_map).l_tls_offset = roundup (TLS_INIT_TCB_SIZE, |
3fb55878 | 302 | GL(dl_rtld_map).l_tls_align); |
5d6feea8 | 303 | initdtv[1].pointer = (char *) tlsblock + GL(dl_rtld_map).l_tls_offset); |
535b764d UD |
304 | # else |
305 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
306 | # endif | |
5d6feea8 UD |
307 | memset (__mempcpy (initdtv[1].pointer, GL(dl_rtld_map).l_tls_initimage, |
308 | GL(dl_rtld_map).l_tls_initimage_size), | |
309 | '\0', (GL(dl_rtld_map).l_tls_blocksize | |
310 | - GL(dl_rtld_map).l_tls_initimage_size)); | |
535b764d | 311 | |
a52d1562 UD |
312 | /* Install the pointer to the dtv. */ |
313 | ||
535b764d UD |
314 | /* Initialize the thread pointer. */ |
315 | # if TLS_TCB_AT_TP | |
5d6feea8 UD |
316 | GL(dl_rtld_map).l_tls_offset |
317 | = roundup (GL(dl_rtld_map).l_tls_blocksize, TLS_INIT_TCB_ALIGN); | |
a52d1562 UD |
318 | |
319 | INSTALL_DTV ((char *) tlsblock + GL(dl_rtld_map).l_tls_offset, | |
5d6feea8 | 320 | initdtv); |
a52d1562 UD |
321 | |
322 | TLS_INIT_TP ((char *) tlsblock + GL(dl_rtld_map).l_tls_offset); | |
535b764d | 323 | # elif TLS_DTV_AT_TP |
a52d1562 UD |
324 | INSTALL_DTV (tlsblock, initdtv); |
325 | TLS_INIT_TP (tlsblock); | |
535b764d UD |
326 | # else |
327 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
328 | # endif | |
329 | ||
5d6feea8 UD |
330 | /* So far this is module number one. */ |
331 | GL(dl_rtld_map).l_tls_modid = 1; | |
332 | ||
535b764d UD |
333 | /* There can only be one PT_TLS entry. */ |
334 | break; | |
335 | } | |
336 | #endif /* use TLS */ | |
337 | ||
d66e34cd RM |
338 | /* Call the OS-dependent function to set up life so we can do things like |
339 | file access. It will call `dl_main' (below) to do all the real work | |
340 | of the dynamic linker, and then unwind our frame and run the user | |
341 | entry point on the same stack we entered on. */ | |
6a1db4ff | 342 | *start_addr = _dl_sysdep_start (arg, &dl_main); |
535b764d | 343 | |
8b07d6a8 | 344 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
345 | if (HP_TIMING_AVAIL) |
346 | { | |
347 | hp_timing_t end_time; | |
348 | ||
349 | /* Get the current time. */ | |
350 | HP_TIMING_NOW (end_time); | |
351 | ||
352 | /* Compute the difference. */ | |
353 | HP_TIMING_DIFF (rtld_total_time, start_time, end_time); | |
354 | } | |
8b07d6a8 | 355 | #endif |
db276fa1 | 356 | |
d6b5d570 | 357 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_STATISTICS, 0)) |
db276fa1 UD |
358 | print_statistics (); |
359 | ||
6a1db4ff | 360 | return *start_addr; |
d66e34cd RM |
361 | } |
362 | ||
d66e34cd RM |
363 | /* Now life is peachy; we can do all normal operations. |
364 | On to the real work. */ | |
365 | ||
993b3242 UD |
366 | /* Some helper functions. */ |
367 | ||
368 | /* Arguments to relocate_doit. */ | |
369 | struct relocate_args | |
370 | { | |
371 | struct link_map *l; | |
372 | int lazy; | |
373 | }; | |
374 | ||
375 | struct map_args | |
376 | { | |
377 | /* Argument to map_doit. */ | |
378 | char *str; | |
379 | /* Return value of map_doit. */ | |
380 | struct link_map *main_map; | |
381 | }; | |
382 | ||
383 | /* Arguments to version_check_doit. */ | |
384 | struct version_check_args | |
385 | { | |
993b3242 | 386 | int doexit; |
145b8413 | 387 | int dotrace; |
993b3242 UD |
388 | }; |
389 | ||
390 | static void | |
391 | relocate_doit (void *a) | |
392 | { | |
393 | struct relocate_args *args = (struct relocate_args *) a; | |
394 | ||
cff26a3e | 395 | INTUSE(_dl_relocate_object) (args->l, args->l->l_scope, args->lazy, 0); |
993b3242 UD |
396 | } |
397 | ||
398 | static void | |
399 | map_doit (void *a) | |
400 | { | |
be935610 | 401 | struct map_args *args = (struct map_args *) a; |
cff26a3e | 402 | args->main_map = INTUSE(_dl_map_object) (NULL, args->str, 0, lt_library, 0, 0); |
993b3242 UD |
403 | } |
404 | ||
405 | static void | |
406 | version_check_doit (void *a) | |
407 | { | |
be935610 | 408 | struct version_check_args *args = (struct version_check_args *) a; |
d6b5d570 | 409 | if (_dl_check_all_versions (GL(dl_loaded), 1, args->dotrace) && args->doexit) |
993b3242 UD |
410 | /* We cannot start the application. Abort now. */ |
411 | _exit (1); | |
412 | } | |
413 | ||
ce37fa88 UD |
414 | |
415 | static inline struct link_map * | |
416 | find_needed (const char *name) | |
417 | { | |
d6b5d570 | 418 | unsigned int n = GL(dl_loaded)->l_searchlist.r_nlist; |
ce37fa88 | 419 | |
be935610 | 420 | while (n-- > 0) |
d6b5d570 UD |
421 | if (_dl_name_match_p (name, GL(dl_loaded)->l_searchlist.r_list[n])) |
422 | return GL(dl_loaded)->l_searchlist.r_list[n]; | |
ce37fa88 UD |
423 | |
424 | /* Should never happen. */ | |
425 | return NULL; | |
426 | } | |
427 | ||
428 | static int | |
429 | match_version (const char *string, struct link_map *map) | |
430 | { | |
a42195db | 431 | const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
ce37fa88 UD |
432 | ElfW(Verdef) *def; |
433 | ||
b0982c4a | 434 | #define VERDEFTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERDEF)) |
ce37fa88 UD |
435 | if (map->l_info[VERDEFTAG] == NULL) |
436 | /* The file has no symbol versioning. */ | |
437 | return 0; | |
438 | ||
439 | def = (ElfW(Verdef) *) ((char *) map->l_addr | |
440 | + map->l_info[VERDEFTAG]->d_un.d_ptr); | |
441 | while (1) | |
442 | { | |
443 | ElfW(Verdaux) *aux = (ElfW(Verdaux) *) ((char *) def + def->vd_aux); | |
444 | ||
445 | /* Compare the version strings. */ | |
446 | if (strcmp (string, strtab + aux->vda_name) == 0) | |
447 | /* Bingo! */ | |
448 | return 1; | |
449 | ||
450 | /* If no more definitions we failed to find what we want. */ | |
451 | if (def->vd_next == 0) | |
452 | break; | |
453 | ||
454 | /* Next definition. */ | |
455 | def = (ElfW(Verdef) *) ((char *) def + def->vd_next); | |
456 | } | |
457 | ||
458 | return 0; | |
459 | } | |
460 | ||
120b4c49 UD |
461 | static const char *library_path; /* The library search path. */ |
462 | static const char *preloadlist; /* The list preloaded objects. */ | |
463 | static int version_info; /* Nonzero if information about | |
464 | versions has to be printed. */ | |
a1a9d215 | 465 | |
d66e34cd | 466 | static void |
266180eb | 467 | dl_main (const ElfW(Phdr) *phdr, |
72f70279 | 468 | ElfW(Word) phnum, |
266180eb | 469 | ElfW(Addr) *user_entry) |
d66e34cd | 470 | { |
266180eb | 471 | const ElfW(Phdr) *ph; |
ea278354 | 472 | enum mode mode; |
2064087b RM |
473 | struct link_map **preloads; |
474 | unsigned int npreloads; | |
14bab8de UD |
475 | size_t file_size; |
476 | char *file; | |
164a7164 | 477 | bool has_interp = false; |
77aba05b | 478 | unsigned int i; |
164a7164 UD |
479 | bool prelinked = false; |
480 | bool rtld_is_main = false; | |
5732c4df | 481 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
482 | hp_timing_t start; |
483 | hp_timing_t stop; | |
484 | hp_timing_t diff; | |
5732c4df | 485 | #endif |
a52d1562 UD |
486 | #ifdef USE_TLS |
487 | void *tcbp; | |
488 | #endif | |
d66e34cd | 489 | |
ea278354 | 490 | /* Process the environment variable which control the behaviour. */ |
ba9fcb3f | 491 | process_envvars (&mode); |
3996f34b | 492 | |
46ec036d UD |
493 | /* Set up a flag which tells we are just starting. */ |
494 | _dl_starting_up = 1; | |
495 | ||
a16956f3 | 496 | if (*user_entry == (ElfW(Addr)) ENTRY_POINT) |
0200214b RM |
497 | { |
498 | /* Ho ho. We are not the program interpreter! We are the program | |
499 | itself! This means someone ran ld.so as a command. Well, that | |
500 | might be convenient to do sometimes. We support it by | |
501 | interpreting the args like this: | |
502 | ||
503 | ld.so PROGRAM ARGS... | |
504 | ||
505 | The first argument is the name of a file containing an ELF | |
506 | executable we will load and run with the following arguments. | |
507 | To simplify life here, PROGRAM is searched for using the | |
508 | normal rules for shared objects, rather than $PATH or anything | |
509 | like that. We just load it and use its entry point; we don't | |
510 | pay attention to its PT_INTERP command (we are the interpreter | |
511 | ourselves). This is an easy way to test a new ld.so before | |
512 | installing it. */ | |
164a7164 | 513 | rtld_is_main = true; |
421f82e5 | 514 | |
ffee1316 | 515 | /* Note the place where the dynamic linker actually came from. */ |
d6b5d570 | 516 | GL(dl_rtld_map).l_name = _dl_argv[0]; |
6a76c115 | 517 | |
fd26970f UD |
518 | while (_dl_argc > 1) |
519 | if (! strcmp (_dl_argv[1], "--list")) | |
520 | { | |
521 | mode = list; | |
5688da55 | 522 | GL(dl_lazy) = -1; /* This means do no dependency analysis. */ |
61965e9b | 523 | |
fd26970f UD |
524 | ++_dl_skip_args; |
525 | --_dl_argc; | |
526 | ++_dl_argv; | |
527 | } | |
528 | else if (! strcmp (_dl_argv[1], "--verify")) | |
529 | { | |
530 | mode = verify; | |
6a76c115 | 531 | |
fd26970f UD |
532 | ++_dl_skip_args; |
533 | --_dl_argc; | |
534 | ++_dl_argv; | |
535 | } | |
310930c1 | 536 | else if (! strcmp (_dl_argv[1], "--library-path") && _dl_argc > 2) |
880f421f UD |
537 | { |
538 | library_path = _dl_argv[2]; | |
539 | ||
310930c1 UD |
540 | _dl_skip_args += 2; |
541 | _dl_argc -= 2; | |
542 | _dl_argv += 2; | |
543 | } | |
b0a01055 | 544 | else if (! strcmp (_dl_argv[1], "--inhibit-rpath") && _dl_argc > 2) |
310930c1 | 545 | { |
d6b5d570 | 546 | GL(dl_inhibit_rpath) = _dl_argv[2]; |
310930c1 | 547 | |
880f421f UD |
548 | _dl_skip_args += 2; |
549 | _dl_argc -= 2; | |
550 | _dl_argv += 2; | |
551 | } | |
fd26970f UD |
552 | else |
553 | break; | |
d66e34cd | 554 | |
61eb22d3 UD |
555 | /* If we have no further argument the program was called incorrectly. |
556 | Grant the user some education. */ | |
557 | if (_dl_argc < 2) | |
35fc382a | 558 | _dl_fatal_printf ("\ |
2bcf29ba | 559 | Usage: ld.so [OPTION]... EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\ |
61eb22d3 UD |
560 | You have invoked `ld.so', the helper program for shared library executables.\n\ |
561 | This program usually lives in the file `/lib/ld.so', and special directives\n\ | |
562 | in executable files using ELF shared libraries tell the system's program\n\ | |
563 | loader to load the helper program from this file. This helper program loads\n\ | |
564 | the shared libraries needed by the program executable, prepares the program\n\ | |
565 | to run, and runs it. You may invoke this helper program directly from the\n\ | |
566 | command line to load and run an ELF executable file; this is like executing\n\ | |
567 | that file itself, but always uses this helper program from the file you\n\ | |
568 | specified, instead of the helper program file specified in the executable\n\ | |
569 | file you run. This is mostly of use for maintainers to test new versions\n\ | |
2bcf29ba UD |
570 | of this helper program; chances are you did not intend to run this program.\n\ |
571 | \n\ | |
b0a01055 UD |
572 | --list list all dependencies and how they are resolved\n\ |
573 | --verify verify that given object really is a dynamically linked\n\ | |
e8b1163e | 574 | object we can handle\n\ |
b0a01055 UD |
575 | --library-path PATH use given PATH instead of content of the environment\n\ |
576 | variable LD_LIBRARY_PATH\n\ | |
fcf70d41 | 577 | --inhibit-rpath LIST ignore RUNPATH and RPATH information in object names\n\ |
35fc382a | 578 | in LIST\n"); |
61eb22d3 | 579 | |
0200214b RM |
580 | ++_dl_skip_args; |
581 | --_dl_argc; | |
582 | ++_dl_argv; | |
91f62ce6 | 583 | |
da832465 UD |
584 | /* Initialize the data structures for the search paths for shared |
585 | objects. */ | |
586 | _dl_init_paths (library_path); | |
587 | ||
9a821cf9 | 588 | if (__builtin_expect (mode, normal) == verify) |
2de99474 | 589 | { |
8e17ea58 UD |
590 | const char *objname; |
591 | const char *err_str = NULL; | |
993b3242 | 592 | struct map_args args; |
2de99474 | 593 | |
993b3242 | 594 | args.str = _dl_argv[0]; |
cff26a3e | 595 | (void) INTUSE(_dl_catch_error) (&objname, &err_str, map_doit, &args); |
8e17ea58 | 596 | if (__builtin_expect (err_str != NULL, 0)) |
dcf0671d | 597 | { |
ca3c0135 UD |
598 | if (err_str != _dl_out_of_memory) |
599 | free ((char *) err_str); | |
dcf0671d UD |
600 | _exit (EXIT_FAILURE); |
601 | } | |
2de99474 UD |
602 | } |
603 | else | |
db276fa1 UD |
604 | { |
605 | HP_TIMING_NOW (start); | |
cff26a3e | 606 | INTUSE(_dl_map_object) (NULL, _dl_argv[0], 0, lt_library, 0, 0); |
db276fa1 | 607 | HP_TIMING_NOW (stop); |
61e0617a | 608 | |
db276fa1 UD |
609 | HP_TIMING_DIFF (load_time, start, stop); |
610 | } | |
2de99474 | 611 | |
d6b5d570 UD |
612 | phdr = GL(dl_loaded)->l_phdr; |
613 | phnum = GL(dl_loaded)->l_phnum; | |
143e2b96 UD |
614 | /* We overwrite here a pointer to a malloc()ed string. But since |
615 | the malloc() implementation used at this point is the dummy | |
616 | implementations which has no real free() function it does not | |
617 | makes sense to free the old string first. */ | |
d6b5d570 UD |
618 | GL(dl_loaded)->l_name = (char *) ""; |
619 | *user_entry = GL(dl_loaded)->l_entry; | |
0200214b RM |
620 | } |
621 | else | |
622 | { | |
623 | /* Create a link_map for the executable itself. | |
624 | This will be what dlopen on "" returns. */ | |
87c812c2 | 625 | _dl_new_object ((char *) "", "", lt_executable, NULL); |
d6b5d570 | 626 | if (GL(dl_loaded) == NULL) |
35fc382a | 627 | _dl_fatal_printf ("cannot allocate memory for link map\n"); |
d6b5d570 UD |
628 | GL(dl_loaded)->l_phdr = phdr; |
629 | GL(dl_loaded)->l_phnum = phnum; | |
630 | GL(dl_loaded)->l_entry = *user_entry; | |
da832465 | 631 | |
61e0617a UD |
632 | /* At this point we are in a bit of trouble. We would have to |
633 | fill in the values for l_dev and l_ino. But in general we | |
634 | do not know where the file is. We also do not handle AT_EXECFD | |
635 | even if it would be passed up. | |
636 | ||
637 | We leave the values here defined to 0. This is normally no | |
638 | problem as the program code itself is normally no shared | |
639 | object and therefore cannot be loaded dynamically. Nothing | |
640 | prevent the use of dynamic binaries and in these situations | |
641 | we might get problems. We might not be able to find out | |
642 | whether the object is already loaded. But since there is no | |
643 | easy way out and because the dynamic binary must also not | |
644 | have an SONAME we ignore this program for now. If it becomes | |
645 | a problem we can force people using SONAMEs. */ | |
646 | ||
97a51d8a UD |
647 | /* We delay initializing the path structure until we got the dynamic |
648 | information for the program. */ | |
0200214b RM |
649 | } |
650 | ||
d6b5d570 | 651 | GL(dl_loaded)->l_map_end = 0; |
052b6a6c | 652 | /* Perhaps the executable has no PT_LOAD header entries at all. */ |
d6b5d570 | 653 | GL(dl_loaded)->l_map_start = ~0; |
e7beef5f | 654 | /* We opened the file, account for it. */ |
d6b5d570 | 655 | ++GL(dl_loaded)->l_opencount; |
052b6a6c | 656 | |
0200214b | 657 | /* Scan the program header table for the dynamic section. */ |
72f70279 | 658 | for (ph = phdr; ph < &phdr[phnum]; ++ph) |
0200214b RM |
659 | switch (ph->p_type) |
660 | { | |
da832465 UD |
661 | case PT_PHDR: |
662 | /* Find out the load address. */ | |
d6b5d570 | 663 | GL(dl_loaded)->l_addr = (ElfW(Addr)) phdr - ph->p_vaddr; |
da832465 | 664 | break; |
0200214b RM |
665 | case PT_DYNAMIC: |
666 | /* This tells us where to find the dynamic section, | |
667 | which tells us everything we need to do. */ | |
d6b5d570 | 668 | GL(dl_loaded)->l_ld = (void *) GL(dl_loaded)->l_addr + ph->p_vaddr; |
0200214b RM |
669 | break; |
670 | case PT_INTERP: | |
671 | /* This "interpreter segment" was used by the program loader to | |
672 | find the program interpreter, which is this program itself, the | |
673 | dynamic linker. We note what name finds us, so that a future | |
674 | dlopen call or DT_NEEDED entry, for something that wants to link | |
675 | against the dynamic linker as a shared library, will know that | |
676 | the shared object is already loaded. */ | |
d6b5d570 | 677 | _dl_rtld_libname.name = ((const char *) GL(dl_loaded)->l_addr |
be935610 | 678 | + ph->p_vaddr); |
752a2a50 | 679 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 680 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
f41c8091 UD |
681 | |
682 | /* Ordinarilly, we would get additional names for the loader from | |
683 | our DT_SONAME. This can't happen if we were actually linked as | |
684 | a static executable (detect this case when we have no DYNAMIC). | |
685 | If so, assume the filename component of the interpreter path to | |
686 | be our SONAME, and add it to our name list. */ | |
d6b5d570 | 687 | if (GL(dl_rtld_map).l_ld == NULL) |
f41c8091 | 688 | { |
88794e30 UD |
689 | const char *p = NULL; |
690 | const char *cp = _dl_rtld_libname.name; | |
691 | ||
692 | /* Find the filename part of the path. */ | |
693 | while (*cp != '\0') | |
694 | if (*cp++ == '/') | |
695 | p = cp; | |
696 | ||
697 | if (p != NULL) | |
f41c8091 | 698 | { |
88794e30 | 699 | _dl_rtld_libname2.name = p; |
752a2a50 | 700 | /* _dl_rtld_libname2.next = NULL; Already zero. */ |
f41c8091 UD |
701 | _dl_rtld_libname.next = &_dl_rtld_libname2; |
702 | } | |
703 | } | |
704 | ||
164a7164 | 705 | has_interp = true; |
0200214b | 706 | break; |
052b6a6c | 707 | case PT_LOAD: |
052b6a6c UD |
708 | { |
709 | ElfW(Addr) mapstart; | |
2373b30e UD |
710 | ElfW(Addr) allocend; |
711 | ||
712 | /* Remember where the main program starts in memory. */ | |
d6b5d570 UD |
713 | mapstart = (GL(dl_loaded)->l_addr |
714 | + (ph->p_vaddr & ~(ph->p_align - 1))); | |
715 | if (GL(dl_loaded)->l_map_start > mapstart) | |
716 | GL(dl_loaded)->l_map_start = mapstart; | |
2373b30e UD |
717 | |
718 | /* Also where it ends. */ | |
d6b5d570 UD |
719 | allocend = GL(dl_loaded)->l_addr + ph->p_vaddr + ph->p_memsz; |
720 | if (GL(dl_loaded)->l_map_end < allocend) | |
721 | GL(dl_loaded)->l_map_end = allocend; | |
052b6a6c UD |
722 | } |
723 | break; | |
a2f1f5cb UD |
724 | #ifdef USE_TLS |
725 | case PT_TLS: | |
726 | /* Note that in the case the dynamic linker we duplicate work | |
727 | here since we read the PT_TLS entry already in | |
728 | _dl_start_final. But the result is repeatable so do not | |
729 | check for this special but unimportant case. */ | |
730 | GL(dl_loaded)->l_tls_blocksize = ph->p_memsz; | |
3fb55878 | 731 | GL(dl_loaded)->l_tls_align = ph->p_align; |
a2f1f5cb | 732 | GL(dl_loaded)->l_tls_initimage_size = ph->p_filesz; |
b123d06e | 733 | GL(dl_loaded)->l_tls_initimage = (void *) ph->p_vaddr; |
a2f1f5cb | 734 | /* This is the first element of the initialization image list. |
3fb55878 UD |
735 | We create the list as circular since we have to append at |
736 | the end. */ | |
737 | GL(dl_initimage_list) = GL(dl_loaded)->l_tls_nextimage | |
738 | = GL(dl_loaded)->l_tls_previmage = GL(dl_loaded); | |
a2f1f5cb | 739 | |
3fb55878 UD |
740 | /* This image gets the ID one. */ |
741 | GL(dl_tls_max_dtv_idx) = GL(dl_loaded)->l_tls_modid = 1; | |
a2f1f5cb UD |
742 | break; |
743 | #endif | |
0200214b | 744 | } |
d6b5d570 UD |
745 | if (! GL(dl_loaded)->l_map_end) |
746 | GL(dl_loaded)->l_map_end = ~0; | |
747 | if (! GL(dl_rtld_map).l_libname && GL(dl_rtld_map).l_name) | |
c84142e8 UD |
748 | { |
749 | /* We were invoked directly, so the program might not have a | |
750 | PT_INTERP. */ | |
d6b5d570 | 751 | _dl_rtld_libname.name = GL(dl_rtld_map).l_name; |
3fb55878 | 752 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 753 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
c84142e8 | 754 | } |
ffee1316 | 755 | else |
d6b5d570 | 756 | assert (GL(dl_rtld_map).l_libname); /* How else did we get here? */ |
0200214b | 757 | |
9a51759b UD |
758 | if (! rtld_is_main) |
759 | { | |
760 | /* Extract the contents of the dynamic section for easy access. */ | |
d6b5d570 UD |
761 | elf_get_dynamic_info (GL(dl_loaded)); |
762 | if (GL(dl_loaded)->l_info[DT_HASH]) | |
9a51759b | 763 | /* Set up our cache of pointers into the hash table. */ |
d6b5d570 | 764 | _dl_setup_hash (GL(dl_loaded)); |
9a51759b | 765 | } |
0200214b | 766 | |
9a821cf9 | 767 | if (__builtin_expect (mode, normal) == verify) |
e2102c14 UD |
768 | { |
769 | /* We were called just to verify that this is a dynamic | |
770 | executable using us as the program interpreter. Exit with an | |
771 | error if we were not able to load the binary or no interpreter | |
772 | is specified (i.e., this is no dynamically linked binary. */ | |
d6b5d570 | 773 | if (GL(dl_loaded)->l_ld == NULL) |
e2102c14 | 774 | _exit (1); |
e2102c14 UD |
775 | |
776 | /* We allow here some platform specific code. */ | |
777 | #ifdef DISTINGUISH_LIB_VERSIONS | |
778 | DISTINGUISH_LIB_VERSIONS; | |
779 | #endif | |
eb406346 | 780 | _exit (has_interp ? 0 : 2); |
e2102c14 UD |
781 | } |
782 | ||
9a51759b | 783 | if (! rtld_is_main) |
97a51d8a UD |
784 | /* Initialize the data structures for the search paths for shared |
785 | objects. */ | |
120b4c49 | 786 | _dl_init_paths (library_path); |
97a51d8a | 787 | |
0200214b | 788 | /* Put the link_map for ourselves on the chain so it can be found by |
ceb2d9aa | 789 | name. Note that at this point the global chain of link maps contains |
d6b5d570 UD |
790 | exactly one element, which is pointed to by dl_loaded. */ |
791 | if (! GL(dl_rtld_map).l_name) | |
ffee1316 RM |
792 | /* If not invoked directly, the dynamic linker shared object file was |
793 | found by the PT_INTERP name. */ | |
d6b5d570 UD |
794 | GL(dl_rtld_map).l_name = (char *) GL(dl_rtld_map).l_libname->name; |
795 | GL(dl_rtld_map).l_type = lt_library; | |
796 | GL(dl_loaded)->l_next = &GL(dl_rtld_map); | |
797 | GL(dl_rtld_map).l_prev = GL(dl_loaded); | |
798 | ++GL(dl_nloaded); | |
0200214b | 799 | |
14bab8de | 800 | /* We have two ways to specify objects to preload: via environment |
49c091e5 | 801 | variable and via the file /etc/ld.so.preload. The latter can also |
14bab8de | 802 | be used when security is enabled. */ |
2064087b RM |
803 | preloads = NULL; |
804 | npreloads = 0; | |
14bab8de | 805 | |
db33f7d4 | 806 | if (__builtin_expect (preloadlist != NULL, 0)) |
c4029823 | 807 | { |
566efee2 UD |
808 | /* The LD_PRELOAD environment variable gives list of libraries |
809 | separated by white space or colons that are loaded before the | |
fd26970f UD |
810 | executable's dependencies and prepended to the global scope |
811 | list. If the binary is running setuid all elements | |
812 | containing a '/' are ignored since it is insecure. */ | |
813 | char *list = strdupa (preloadlist); | |
814 | char *p; | |
db276fa1 UD |
815 | |
816 | HP_TIMING_NOW (start); | |
817 | ||
9710f75d UD |
818 | /* Prevent optimizing strsep. Speed is not important here. */ |
819 | while ((p = (strsep) (&list, " :")) != NULL) | |
e2102c14 | 820 | if (p[0] != '\0' |
db33f7d4 UD |
821 | && (__builtin_expect (! __libc_enable_secure, 1) |
822 | || strchr (p, '/') == NULL)) | |
fd26970f | 823 | { |
87837aac UD |
824 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
825 | p, 1, | |
826 | lt_library, | |
cff26a3e | 827 | 0, 0); |
42c4f32a | 828 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
829 | /* It is no duplicate. */ |
830 | ++npreloads; | |
fd26970f | 831 | } |
db276fa1 UD |
832 | |
833 | HP_TIMING_NOW (stop); | |
834 | HP_TIMING_DIFF (diff, start, stop); | |
835 | HP_TIMING_ACCUM_NT (load_time, diff); | |
c4029823 UD |
836 | } |
837 | ||
14bab8de UD |
838 | /* Read the contents of the file. */ |
839 | file = _dl_sysdep_read_whole_file ("/etc/ld.so.preload", &file_size, | |
840 | PROT_READ | PROT_WRITE); | |
40b07f5b | 841 | if (__builtin_expect (file != MAP_FAILED, 0)) |
14bab8de UD |
842 | { |
843 | /* Parse the file. It contains names of libraries to be loaded, | |
844 | separated by white spaces or `:'. It may also contain | |
845 | comments introduced by `#'. */ | |
846 | char *problem; | |
847 | char *runp; | |
848 | size_t rest; | |
849 | ||
850 | /* Eliminate comments. */ | |
851 | runp = file; | |
852 | rest = file_size; | |
853 | while (rest > 0) | |
854 | { | |
855 | char *comment = memchr (runp, '#', rest); | |
856 | if (comment == NULL) | |
857 | break; | |
858 | ||
859 | rest -= comment - runp; | |
860 | do | |
861 | *comment = ' '; | |
862 | while (--rest > 0 && *++comment != '\n'); | |
863 | } | |
864 | ||
865 | /* We have one problematic case: if we have a name at the end of | |
866 | the file without a trailing terminating characters, we cannot | |
867 | place the \0. Handle the case separately. */ | |
49891c10 UD |
868 | if (file[file_size - 1] != ' ' && file[file_size - 1] != '\t' |
869 | && file[file_size - 1] != '\n' && file[file_size - 1] != ':') | |
14bab8de UD |
870 | { |
871 | problem = &file[file_size]; | |
872 | while (problem > file && problem[-1] != ' ' && problem[-1] != '\t' | |
49891c10 | 873 | && problem[-1] != '\n' && problem[-1] != ':') |
14bab8de UD |
874 | --problem; |
875 | ||
876 | if (problem > file) | |
877 | problem[-1] = '\0'; | |
878 | } | |
879 | else | |
49891c10 UD |
880 | { |
881 | problem = NULL; | |
882 | file[file_size - 1] = '\0'; | |
883 | } | |
14bab8de | 884 | |
db276fa1 UD |
885 | HP_TIMING_NOW (start); |
886 | ||
14bab8de UD |
887 | if (file != problem) |
888 | { | |
889 | char *p; | |
e2102c14 | 890 | runp = file; |
14bab8de | 891 | while ((p = strsep (&runp, ": \t\n")) != NULL) |
e2102c14 UD |
892 | if (p[0] != '\0') |
893 | { | |
cff26a3e AJ |
894 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
895 | p, 1, | |
896 | lt_library, | |
897 | 0, 0); | |
42c4f32a | 898 | if (++new_map->l_opencount == 1) |
e2102c14 UD |
899 | /* It is no duplicate. */ |
900 | ++npreloads; | |
901 | } | |
14bab8de UD |
902 | } |
903 | ||
904 | if (problem != NULL) | |
905 | { | |
906 | char *p = strndupa (problem, file_size - (problem - file)); | |
87837aac UD |
907 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), p, |
908 | 1, lt_library, | |
909 | 0, 0); | |
42c4f32a | 910 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
911 | /* It is no duplicate. */ |
912 | ++npreloads; | |
14bab8de UD |
913 | } |
914 | ||
db276fa1 UD |
915 | HP_TIMING_NOW (stop); |
916 | HP_TIMING_DIFF (diff, start, stop); | |
917 | HP_TIMING_ACCUM_NT (load_time, diff); | |
918 | ||
14bab8de UD |
919 | /* We don't need the file anymore. */ |
920 | __munmap (file, file_size); | |
921 | } | |
922 | ||
db33f7d4 | 923 | if (__builtin_expect (npreloads, 0) != 0) |
14bab8de UD |
924 | { |
925 | /* Set up PRELOADS with a vector of the preloaded libraries. */ | |
926 | struct link_map *l; | |
14bab8de | 927 | preloads = __alloca (npreloads * sizeof preloads[0]); |
d6b5d570 | 928 | l = GL(dl_rtld_map).l_next; /* End of the chain before preloads. */ |
14bab8de UD |
929 | i = 0; |
930 | do | |
931 | { | |
932 | preloads[i++] = l; | |
933 | l = l->l_next; | |
934 | } while (l); | |
935 | assert (i == npreloads); | |
936 | } | |
937 | ||
2064087b RM |
938 | /* Load all the libraries specified by DT_NEEDED entries. If LD_PRELOAD |
939 | specified some libraries to load, these are inserted before the actual | |
940 | dependencies in the executable's searchlist for symbol resolution. */ | |
db276fa1 | 941 | HP_TIMING_NOW (start); |
87837aac UD |
942 | INTUSE(_dl_map_object_deps) (GL(dl_loaded), preloads, npreloads, |
943 | mode == trace, 0); | |
db276fa1 UD |
944 | HP_TIMING_NOW (stop); |
945 | HP_TIMING_DIFF (diff, start, stop); | |
946 | HP_TIMING_ACCUM_NT (load_time, diff); | |
e3e35cfc | 947 | |
42c4f32a UD |
948 | /* Mark all objects as being in the global scope and set the open |
949 | counter. */ | |
d6b5d570 | 950 | for (i = GL(dl_loaded)->l_searchlist.r_nlist; i > 0; ) |
42c4f32a UD |
951 | { |
952 | --i; | |
d6b5d570 UD |
953 | GL(dl_loaded)->l_searchlist.r_list[i]->l_global = 1; |
954 | ++GL(dl_loaded)->l_searchlist.r_list[i]->l_opencount; | |
42c4f32a | 955 | } |
d66e34cd | 956 | |
2064087b | 957 | #ifndef MAP_ANON |
f332db02 RM |
958 | /* We are done mapping things, so close the zero-fill descriptor. */ |
959 | __close (_dl_zerofd); | |
960 | _dl_zerofd = -1; | |
2064087b | 961 | #endif |
f332db02 | 962 | |
f9496a7b | 963 | /* Remove _dl_rtld_map from the chain. */ |
d6b5d570 UD |
964 | GL(dl_rtld_map).l_prev->l_next = GL(dl_rtld_map).l_next; |
965 | if (GL(dl_rtld_map).l_next) | |
966 | GL(dl_rtld_map).l_next->l_prev = GL(dl_rtld_map).l_prev; | |
f9496a7b | 967 | |
d6b5d570 | 968 | if (__builtin_expect (GL(dl_rtld_map).l_opencount > 1, 1)) |
0200214b | 969 | { |
f9496a7b RM |
970 | /* Some DT_NEEDED entry referred to the interpreter object itself, so |
971 | put it back in the list of visible objects. We insert it into the | |
972 | chain in symbol search order because gdb uses the chain's order as | |
973 | its symbol search order. */ | |
77aba05b | 974 | i = 1; |
d6b5d570 | 975 | while (GL(dl_loaded)->l_searchlist.r_list[i] != &GL(dl_rtld_map)) |
f9496a7b | 976 | ++i; |
d6b5d570 | 977 | GL(dl_rtld_map).l_prev = GL(dl_loaded)->l_searchlist.r_list[i - 1]; |
b2bcd61a | 978 | if (__builtin_expect (mode, normal) == normal) |
d6b5d570 UD |
979 | GL(dl_rtld_map).l_next = (i + 1 < GL(dl_loaded)->l_searchlist.r_nlist |
980 | ? GL(dl_loaded)->l_searchlist.r_list[i + 1] | |
981 | : NULL); | |
b2bcd61a UD |
982 | else |
983 | /* In trace mode there might be an invisible object (which we | |
984 | could not find) after the previous one in the search list. | |
985 | In this case it doesn't matter much where we put the | |
986 | interpreter object, so we just initialize the list pointer so | |
987 | that the assertion below holds. */ | |
d6b5d570 | 988 | GL(dl_rtld_map).l_next = GL(dl_rtld_map).l_prev->l_next; |
b2bcd61a | 989 | |
d6b5d570 UD |
990 | assert (GL(dl_rtld_map).l_prev->l_next == GL(dl_rtld_map).l_next); |
991 | GL(dl_rtld_map).l_prev->l_next = &GL(dl_rtld_map); | |
3fb55878 | 992 | if (GL(dl_rtld_map).l_next != NULL) |
f9496a7b | 993 | { |
d6b5d570 UD |
994 | assert (GL(dl_rtld_map).l_next->l_prev == GL(dl_rtld_map).l_prev); |
995 | GL(dl_rtld_map).l_next->l_prev = &GL(dl_rtld_map); | |
f9496a7b | 996 | } |
0200214b | 997 | } |
d66e34cd | 998 | |
c84142e8 UD |
999 | /* Now let us see whether all libraries are available in the |
1000 | versions we need. */ | |
1001 | { | |
993b3242 UD |
1002 | struct version_check_args args; |
1003 | args.doexit = mode == normal; | |
145b8413 | 1004 | args.dotrace = mode == trace; |
993b3242 | 1005 | _dl_receive_error (print_missing_version, version_check_doit, &args); |
c84142e8 UD |
1006 | } |
1007 | ||
9a821cf9 | 1008 | if (__builtin_expect (mode, normal) != normal) |
0200214b RM |
1009 | { |
1010 | /* We were run just to list the shared libraries. It is | |
1011 | important that we do this before real relocation, because the | |
1012 | functions we call below for output may no longer work properly | |
1013 | after relocation. */ | |
d6b5d570 | 1014 | if (! GL(dl_loaded)->l_info[DT_NEEDED]) |
35fc382a | 1015 | _dl_printf ("\tstatically linked\n"); |
0200214b | 1016 | else |
ceb2d9aa UD |
1017 | { |
1018 | struct link_map *l; | |
1019 | ||
d6b5d570 | 1020 | if (GL(dl_debug_mask) & DL_DEBUG_PRELINK) |
32e6df36 | 1021 | { |
d6b5d570 | 1022 | struct r_scope_elem *scope = &GL(dl_loaded)->l_searchlist; |
32e6df36 UD |
1023 | |
1024 | for (i = 0; i < scope->r_nlist; i++) | |
1025 | { | |
1026 | l = scope->r_list [i]; | |
1027 | if (l->l_faked) | |
1028 | { | |
1029 | _dl_printf ("\t%s => not found\n", l->l_libname->name); | |
1030 | continue; | |
1031 | } | |
d6b5d570 UD |
1032 | if (_dl_name_match_p (GL(dl_trace_prelink), l)) |
1033 | GL(dl_trace_prelink_map) = l; | |
32e6df36 UD |
1034 | _dl_printf ("\t%s => %s (0x%0*Zx, 0x%0*Zx)\n", |
1035 | l->l_libname->name[0] ? l->l_libname->name | |
1036 | : _dl_argv[0] ?: "<main program>", | |
1037 | l->l_name[0] ? l->l_name | |
1038 | : _dl_argv[0] ?: "<main program>", | |
1039 | (int) sizeof l->l_map_start * 2, | |
1040 | l->l_map_start, | |
1041 | (int) sizeof l->l_addr * 2, | |
1042 | l->l_addr); | |
1043 | } | |
1044 | } | |
1045 | else | |
1046 | { | |
d6b5d570 | 1047 | for (l = GL(dl_loaded)->l_next; l; l = l->l_next) |
32e6df36 UD |
1048 | if (l->l_faked) |
1049 | /* The library was not found. */ | |
1050 | _dl_printf ("\t%s => not found\n", l->l_libname->name); | |
1051 | else | |
1052 | _dl_printf ("\t%s => %s (0x%0*Zx)\n", l->l_libname->name, | |
1053 | l->l_name, (int) sizeof l->l_map_start * 2, | |
1054 | l->l_map_start); | |
1055 | } | |
ceb2d9aa | 1056 | } |
1a3a58fd | 1057 | |
9a821cf9 | 1058 | if (__builtin_expect (mode, trace) != trace) |
cddcfecf RM |
1059 | for (i = 1; i < _dl_argc; ++i) |
1060 | { | |
1061 | const ElfW(Sym) *ref = NULL; | |
c0282c06 UD |
1062 | ElfW(Addr) loadbase; |
1063 | lookup_t result; | |
c0282c06 | 1064 | |
cff26a3e AJ |
1065 | result = INTUSE(_dl_lookup_symbol) (_dl_argv[i], GL(dl_loaded), |
1066 | &ref, GL(dl_loaded)->l_scope, | |
1067 | ELF_RTYPE_CLASS_PLT, 1); | |
c0282c06 UD |
1068 | |
1069 | loadbase = LOOKUP_VALUE_ADDRESS (result); | |
1070 | ||
35fc382a | 1071 | _dl_printf ("%s found at 0x%0*Zd in object at 0x%0*Zd\n", |
8a0746ae RM |
1072 | _dl_argv[i], |
1073 | (int) sizeof ref->st_value * 2, ref->st_value, | |
1074 | (int) sizeof loadbase * 2, loadbase); | |
cddcfecf | 1075 | } |
ce37fa88 | 1076 | else |
fd26970f | 1077 | { |
667b0577 | 1078 | /* If LD_WARN is set warn about undefined symbols. */ |
5688da55 | 1079 | if (GL(dl_lazy) >= 0 && GL(dl_verbose)) |
ce37fa88 UD |
1080 | { |
1081 | /* We have to do symbol dependency testing. */ | |
1082 | struct relocate_args args; | |
1083 | struct link_map *l; | |
993b3242 | 1084 | |
5688da55 | 1085 | args.lazy = GL(dl_lazy); |
fd26970f | 1086 | |
d6b5d570 | 1087 | l = GL(dl_loaded); |
ce37fa88 UD |
1088 | while (l->l_next) |
1089 | l = l->l_next; | |
1090 | do | |
1091 | { | |
d6b5d570 | 1092 | if (l != &GL(dl_rtld_map) && ! l->l_faked) |
ce37fa88 UD |
1093 | { |
1094 | args.l = l; | |
1095 | _dl_receive_error (print_unresolved, relocate_doit, | |
1096 | &args); | |
ce37fa88 UD |
1097 | } |
1098 | l = l->l_prev; | |
1099 | } while (l); | |
32e6df36 | 1100 | |
d6b5d570 UD |
1101 | if ((GL(dl_debug_mask) & DL_DEBUG_PRELINK) |
1102 | && GL(dl_rtld_map).l_opencount > 1) | |
cff26a3e AJ |
1103 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), |
1104 | GL(dl_loaded)->l_scope, 0, 0); | |
ce37fa88 UD |
1105 | } |
1106 | ||
b0982c4a | 1107 | #define VERNEEDTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERNEED)) |
120b4c49 | 1108 | if (version_info) |
fd26970f | 1109 | { |
ce37fa88 UD |
1110 | /* Print more information. This means here, print information |
1111 | about the versions needed. */ | |
1112 | int first = 1; | |
d6b5d570 | 1113 | struct link_map *map = GL(dl_loaded); |
ce37fa88 | 1114 | |
d6b5d570 | 1115 | for (map = GL(dl_loaded); map != NULL; map = map->l_next) |
fd26970f | 1116 | { |
f41c8091 | 1117 | const char *strtab; |
ce37fa88 | 1118 | ElfW(Dyn) *dyn = map->l_info[VERNEEDTAG]; |
f41c8091 UD |
1119 | ElfW(Verneed) *ent; |
1120 | ||
1121 | if (dyn == NULL) | |
1122 | continue; | |
1123 | ||
a42195db | 1124 | strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
f41c8091 | 1125 | ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr); |
ce37fa88 | 1126 | |
f41c8091 | 1127 | if (first) |
ce37fa88 | 1128 | { |
35fc382a | 1129 | _dl_printf ("\n\tVersion information:\n"); |
f41c8091 UD |
1130 | first = 0; |
1131 | } | |
ce37fa88 | 1132 | |
35fc382a UD |
1133 | _dl_printf ("\t%s:\n", |
1134 | map->l_name[0] ? map->l_name : _dl_argv[0]); | |
f41c8091 UD |
1135 | |
1136 | while (1) | |
1137 | { | |
1138 | ElfW(Vernaux) *aux; | |
1139 | struct link_map *needed; | |
ce37fa88 | 1140 | |
f41c8091 UD |
1141 | needed = find_needed (strtab + ent->vn_file); |
1142 | aux = (ElfW(Vernaux) *) ((char *) ent + ent->vn_aux); | |
ce37fa88 UD |
1143 | |
1144 | while (1) | |
1145 | { | |
f41c8091 UD |
1146 | const char *fname = NULL; |
1147 | ||
f41c8091 | 1148 | if (needed != NULL |
ba9fcb3f UD |
1149 | && match_version (strtab + aux->vna_name, |
1150 | needed)) | |
f41c8091 UD |
1151 | fname = needed->l_name; |
1152 | ||
35fc382a UD |
1153 | _dl_printf ("\t\t%s (%s) %s=> %s\n", |
1154 | strtab + ent->vn_file, | |
1155 | strtab + aux->vna_name, | |
1156 | aux->vna_flags & VER_FLG_WEAK | |
1157 | ? "[WEAK] " : "", | |
1158 | fname ?: "not found"); | |
ce37fa88 | 1159 | |
f41c8091 UD |
1160 | if (aux->vna_next == 0) |
1161 | /* No more symbols. */ | |
ce37fa88 UD |
1162 | break; |
1163 | ||
f41c8091 UD |
1164 | /* Next symbol. */ |
1165 | aux = (ElfW(Vernaux) *) ((char *) aux | |
1166 | + aux->vna_next); | |
ce37fa88 | 1167 | } |
f41c8091 UD |
1168 | |
1169 | if (ent->vn_next == 0) | |
1170 | /* No more dependencies. */ | |
1171 | break; | |
1172 | ||
1173 | /* Next dependency. */ | |
1174 | ent = (ElfW(Verneed) *) ((char *) ent + ent->vn_next); | |
ce37fa88 | 1175 | } |
fd26970f | 1176 | } |
ce37fa88 | 1177 | } |
fd26970f | 1178 | } |
d66e34cd | 1179 | |
0200214b RM |
1180 | _exit (0); |
1181 | } | |
86d2c878 | 1182 | |
a52d1562 UD |
1183 | #ifdef USE_TLS |
1184 | /* Now it is time to determine the layout of the static TLS block | |
1185 | and allocate it for the initial thread. Note that we always | |
1186 | allocate the static block, we never defer it even if no | |
1187 | DF_STATIC_TLS bit is set. The reason is that we know glibc will | |
1188 | use the static model. First add the dynamic linker to the list | |
1189 | if it also uses TLS. */ | |
1190 | if (GL(dl_rtld_map).l_tls_blocksize != 0) | |
1191 | { | |
1192 | /* At to the list. */ | |
1193 | if (GL(dl_initimage_list) == NULL) | |
1194 | GL(dl_initimage_list) = GL(dl_rtld_map).l_tls_nextimage | |
1195 | = GL(dl_rtld_map).l_tls_previmage = &GL(dl_rtld_map); | |
1196 | else | |
1197 | { | |
1198 | GL(dl_rtld_map).l_tls_nextimage | |
1199 | = GL(dl_initimage_list)->l_tls_nextimage; | |
1200 | GL(dl_rtld_map).l_tls_nextimage->l_tls_previmage | |
1201 | = &GL(dl_rtld_map); | |
1202 | GL(dl_rtld_map).l_tls_previmage = GL(dl_initimage_list); | |
1203 | GL(dl_rtld_map).l_tls_previmage->l_tls_nextimage | |
1204 | = &GL(dl_rtld_map); | |
1205 | GL(dl_initimage_list) = &GL(dl_rtld_map); | |
1206 | } | |
1207 | ||
1208 | /* Assign a module ID. */ | |
1209 | GL(dl_rtld_map).l_tls_modid = _dl_next_tls_modid (); | |
1210 | } | |
1211 | ||
1212 | /* Computer the TLS offsets for the various blocks. We call this | |
1213 | function even if none of the modules available at startup time | |
1214 | uses TLS to initialize some variables. */ | |
1215 | _dl_determine_tlsoffset (GL(dl_initimage_list)); | |
1216 | ||
1217 | /* Construct the static TLS block and the dtv for the initial | |
1218 | thread. For some platforms this will include allocating memory | |
1219 | for the thread descriptor. The memory for the TLS block will | |
1220 | never be freed. It should be allocated accordingly. The dtv | |
1221 | array can be changed if dynamic loading requires it. */ | |
1222 | tcbp = _dl_allocate_tls (); | |
1223 | if (tcbp == NULL) | |
1224 | _dl_fatal_printf ("cannot allocate TLS data structures for inital thread"); | |
1225 | ||
1226 | /* And finally install it for the main thread. */ | |
1227 | TLS_INIT_TP (tcbp); | |
1228 | #endif | |
1229 | ||
d6b5d570 UD |
1230 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)] |
1231 | && ! __builtin_expect (GL(dl_profile) != NULL, 0)) | |
32e6df36 UD |
1232 | { |
1233 | ElfW(Lib) *liblist, *liblistend; | |
1234 | struct link_map **r_list, **r_listend, *l; | |
9710f75d UD |
1235 | const char *strtab = (const void *) D_PTR (GL(dl_loaded), |
1236 | l_info[DT_STRTAB]); | |
32e6df36 | 1237 | |
d6b5d570 | 1238 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL); |
32e6df36 | 1239 | liblist = (ElfW(Lib) *) |
d6b5d570 | 1240 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)]->d_un.d_ptr; |
32e6df36 UD |
1241 | liblistend = (ElfW(Lib) *) |
1242 | ((char *) liblist | |
d6b5d570 UD |
1243 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)]->d_un.d_val); |
1244 | r_list = GL(dl_loaded)->l_searchlist.r_list; | |
1245 | r_listend = r_list + GL(dl_loaded)->l_searchlist.r_nlist; | |
32e6df36 UD |
1246 | |
1247 | for (; r_list < r_listend && liblist < liblistend; r_list++) | |
1248 | { | |
1249 | l = *r_list; | |
1250 | ||
d6b5d570 | 1251 | if (l == GL(dl_loaded)) |
32e6df36 UD |
1252 | continue; |
1253 | ||
1254 | /* If the library is not mapped where it should, fail. */ | |
1255 | if (l->l_addr) | |
1256 | break; | |
1257 | ||
1258 | /* Next, check if checksum matches. */ | |
1259 | if (l->l_info [VALIDX(DT_CHECKSUM)] == NULL | |
1260 | || l->l_info [VALIDX(DT_CHECKSUM)]->d_un.d_val | |
1261 | != liblist->l_checksum) | |
1262 | break; | |
1263 | ||
1264 | if (l->l_info [VALIDX(DT_GNU_PRELINKED)] == NULL | |
1265 | || l->l_info [VALIDX(DT_GNU_PRELINKED)]->d_un.d_val | |
1266 | != liblist->l_time_stamp) | |
1267 | break; | |
1268 | ||
1269 | if (! _dl_name_match_p (strtab + liblist->l_name, l)) | |
1270 | break; | |
1271 | ||
1272 | ++liblist; | |
1273 | } | |
1274 | ||
1275 | ||
1276 | if (r_list == r_listend && liblist == liblistend) | |
164a7164 | 1277 | prelinked = true; |
32e6df36 | 1278 | |
d6b5d570 | 1279 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_LIBS, 0)) |
32e6df36 UD |
1280 | _dl_printf ("\nprelink checking: %s\n", prelinked ? "ok" : "failed"); |
1281 | } | |
1282 | ||
1283 | if (prelinked) | |
1284 | { | |
d6b5d570 | 1285 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)] != NULL) |
32e6df36 UD |
1286 | { |
1287 | ElfW(Rela) *conflict, *conflictend; | |
1288 | #ifndef HP_TIMING_NONAVAIL | |
1289 | hp_timing_t start; | |
1290 | hp_timing_t stop; | |
1291 | #endif | |
1292 | ||
1293 | HP_TIMING_NOW (start); | |
d6b5d570 | 1294 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)] != NULL); |
32e6df36 | 1295 | conflict = (ElfW(Rela) *) |
d6b5d570 | 1296 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)]->d_un.d_ptr; |
32e6df36 UD |
1297 | conflictend = (ElfW(Rela) *) |
1298 | ((char *) conflict | |
d6b5d570 UD |
1299 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)]->d_un.d_val); |
1300 | _dl_resolve_conflicts (GL(dl_loaded), conflict, conflictend); | |
32e6df36 UD |
1301 | HP_TIMING_NOW (stop); |
1302 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1303 | } | |
1304 | ||
1305 | _dl_sysdep_start_cleanup (); | |
1306 | } | |
1307 | else | |
164a7164 UD |
1308 | { |
1309 | /* Now we have all the objects loaded. Relocate them all except for | |
1310 | the dynamic linker itself. We do this in reverse order so that copy | |
1311 | relocs of earlier objects overwrite the data written by later | |
1312 | objects. We do not re-relocate the dynamic linker itself in this | |
1313 | loop because that could result in the GOT entries for functions we | |
1314 | call being changed, and that would break us. It is safe to relocate | |
1315 | the dynamic linker out of order because it has no copy relocs (we | |
1316 | know that because it is self-contained). */ | |
1317 | ||
1318 | struct link_map *l; | |
1319 | int consider_profiling = GL(dl_profile) != NULL; | |
8b07d6a8 | 1320 | #ifndef HP_TIMING_NONAVAIL |
164a7164 UD |
1321 | hp_timing_t start; |
1322 | hp_timing_t stop; | |
1323 | hp_timing_t add; | |
8b07d6a8 | 1324 | #endif |
c0fb8a56 | 1325 | |
164a7164 UD |
1326 | /* If we are profiling we also must do lazy reloaction. */ |
1327 | GL(dl_lazy) |= consider_profiling; | |
c0fb8a56 | 1328 | |
164a7164 UD |
1329 | l = GL(dl_loaded); |
1330 | while (l->l_next) | |
1331 | l = l->l_next; | |
db276fa1 | 1332 | |
164a7164 UD |
1333 | HP_TIMING_NOW (start); |
1334 | do | |
1335 | { | |
1336 | /* While we are at it, help the memory handling a bit. We have to | |
1337 | mark some data structures as allocated with the fake malloc() | |
1338 | implementation in ld.so. */ | |
1339 | struct libname_list *lnp = l->l_libname->next; | |
752a2a50 | 1340 | |
164a7164 UD |
1341 | while (__builtin_expect (lnp != NULL, 0)) |
1342 | { | |
1343 | lnp->dont_free = 1; | |
1344 | lnp = lnp->next; | |
1345 | } | |
752a2a50 | 1346 | |
164a7164 | 1347 | if (l != &GL(dl_rtld_map)) |
cff26a3e AJ |
1348 | INTUSE(_dl_relocate_object) (l, l->l_scope, GL(dl_lazy), |
1349 | consider_profiling); | |
be935610 | 1350 | |
164a7164 UD |
1351 | l = l->l_prev; |
1352 | } | |
1353 | while (l); | |
1354 | HP_TIMING_NOW (stop); | |
1355 | ||
1356 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1357 | ||
1358 | /* Do any necessary cleanups for the startup OS interface code. | |
1359 | We do these now so that no calls are made after rtld re-relocation | |
1360 | which might be resolved to different functions than we expect. | |
1361 | We cannot do this before relocating the other objects because | |
1362 | _dl_relocate_object might need to call `mprotect' for DT_TEXTREL. */ | |
1363 | _dl_sysdep_start_cleanup (); | |
1364 | ||
1365 | /* Now enable profiling if needed. Like the previous call, | |
1366 | this has to go here because the calls it makes should use the | |
1367 | rtld versions of the functions (particularly calloc()), but it | |
1368 | needs to have _dl_profile_map set up by the relocator. */ | |
1369 | if (__builtin_expect (GL(dl_profile_map) != NULL, 0)) | |
1370 | /* We must prepare the profiling. */ | |
cff26a3e | 1371 | INTUSE(_dl_start_profile) (GL(dl_profile_map), GL(dl_profile_output)); |
164a7164 UD |
1372 | |
1373 | if (GL(dl_rtld_map).l_opencount > 1) | |
1374 | { | |
1375 | /* There was an explicit ref to the dynamic linker as a shared lib. | |
1376 | Re-relocate ourselves with user-controlled symbol definitions. */ | |
1377 | HP_TIMING_NOW (start); | |
cff26a3e AJ |
1378 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), GL(dl_loaded)->l_scope, |
1379 | 0, 0); | |
164a7164 UD |
1380 | HP_TIMING_NOW (stop); |
1381 | HP_TIMING_DIFF (add, start, stop); | |
1382 | HP_TIMING_ACCUM_NT (relocate_time, add); | |
1383 | } | |
1384 | } | |
ac16e905 | 1385 | |
be935610 | 1386 | /* Now set up the variable which helps the assembler startup code. */ |
d6b5d570 UD |
1387 | GL(dl_main_searchlist) = &GL(dl_loaded)->l_searchlist; |
1388 | GL(dl_global_scope)[0] = &GL(dl_loaded)->l_searchlist; | |
be935610 | 1389 | |
32e6df36 | 1390 | /* Save the information about the original global scope list since |
604510f7 | 1391 | we need it in the memory handling later. */ |
d6b5d570 | 1392 | GL(dl_initial_searchlist) = *GL(dl_main_searchlist); |
604510f7 | 1393 | |
4d6acc61 RM |
1394 | { |
1395 | /* Initialize _r_debug. */ | |
d6b5d570 | 1396 | struct r_debug *r = _dl_debug_initialize (GL(dl_rtld_map).l_addr); |
ceb2d9aa | 1397 | struct link_map *l; |
4d6acc61 | 1398 | |
d6b5d570 | 1399 | l = GL(dl_loaded); |
ec42724d RM |
1400 | |
1401 | #ifdef ELF_MACHINE_DEBUG_SETUP | |
1402 | ||
1403 | /* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */ | |
1404 | ||
1405 | ELF_MACHINE_DEBUG_SETUP (l, r); | |
d6b5d570 | 1406 | ELF_MACHINE_DEBUG_SETUP (&GL(dl_rtld_map), r); |
ec42724d RM |
1407 | |
1408 | #else | |
1409 | ||
3fb55878 | 1410 | if (l->l_info[DT_DEBUG] != NULL) |
4d6acc61 RM |
1411 | /* There is a DT_DEBUG entry in the dynamic section. Fill it in |
1412 | with the run-time address of the r_debug structure */ | |
1413 | l->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1414 | ||
d746b89c RM |
1415 | /* Fill in the pointer in the dynamic linker's own dynamic section, in |
1416 | case you run gdb on the dynamic linker directly. */ | |
3fb55878 | 1417 | if (GL(dl_rtld_map).l_info[DT_DEBUG] != NULL) |
d6b5d570 | 1418 | GL(dl_rtld_map).l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; |
d746b89c | 1419 | |
ec42724d RM |
1420 | #endif |
1421 | ||
4d6acc61 RM |
1422 | /* Notify the debugger that all objects are now mapped in. */ |
1423 | r->r_state = RT_ADD; | |
cff26a3e | 1424 | INTUSE(_dl_debug_state) (); |
4d6acc61 | 1425 | } |
0200214b | 1426 | |
08cac4ac UD |
1427 | #ifndef MAP_COPY |
1428 | /* We must munmap() the cache file. */ | |
cff26a3e | 1429 | INTUSE(_dl_unload_cache) (); |
08cac4ac UD |
1430 | #endif |
1431 | ||
d66e34cd RM |
1432 | /* Once we return, _dl_sysdep_start will invoke |
1433 | the DT_INIT functions and then *USER_ENTRY. */ | |
1434 | } | |
fd26970f UD |
1435 | \f |
1436 | /* This is a little helper function for resolving symbols while | |
1437 | tracing the binary. */ | |
1438 | static void | |
c84142e8 UD |
1439 | print_unresolved (int errcode __attribute__ ((unused)), const char *objname, |
1440 | const char *errstring) | |
fd26970f | 1441 | { |
3996f34b UD |
1442 | if (objname[0] == '\0') |
1443 | objname = _dl_argv[0] ?: "<main program>"; | |
35fc382a | 1444 | _dl_error_printf ("%s (%s)\n", errstring, objname); |
fd26970f | 1445 | } |
c84142e8 UD |
1446 | \f |
1447 | /* This is a little helper function for resolving symbols while | |
1448 | tracing the binary. */ | |
1449 | static void | |
1450 | print_missing_version (int errcode __attribute__ ((unused)), | |
1451 | const char *objname, const char *errstring) | |
1452 | { | |
35fc382a UD |
1453 | _dl_error_printf ("%s: %s: %s\n", _dl_argv[0] ?: "<program name unknown>", |
1454 | objname, errstring); | |
c84142e8 | 1455 | } |
ea278354 | 1456 | \f |
7dea968e UD |
1457 | /* Nonzero if any of the debugging options is enabled. */ |
1458 | static int any_debug; | |
1459 | ||
b5efde2f UD |
1460 | /* Process the string given as the parameter which explains which debugging |
1461 | options are enabled. */ | |
1462 | static void | |
14c44e2e | 1463 | process_dl_debug (const char *dl_debug) |
b5efde2f | 1464 | { |
3e2040c8 UD |
1465 | /* When adding new entries make sure that the maximal length of a name |
1466 | is correctly handled in the LD_DEBUG_HELP code below. */ | |
1467 | static const struct | |
1468 | { | |
379d4ec4 UD |
1469 | unsigned char len; |
1470 | const char name[10]; | |
3e2040c8 UD |
1471 | const char helptext[41]; |
1472 | unsigned short int mask; | |
1473 | } debopts[] = | |
1474 | { | |
379d4ec4 UD |
1475 | #define LEN_AND_STR(str) sizeof (str) - 1, str |
1476 | { LEN_AND_STR ("libs"), "display library search paths", | |
3e2040c8 | 1477 | DL_DEBUG_LIBS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1478 | { LEN_AND_STR ("reloc"), "display relocation processing", |
3e2040c8 | 1479 | DL_DEBUG_RELOC | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1480 | { LEN_AND_STR ("files"), "display progress for input file", |
3e2040c8 | 1481 | DL_DEBUG_FILES | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1482 | { LEN_AND_STR ("symbols"), "display symbol table processing", |
3e2040c8 | 1483 | DL_DEBUG_SYMBOLS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1484 | { LEN_AND_STR ("bindings"), "display information about symbol binding", |
3e2040c8 | 1485 | DL_DEBUG_BINDINGS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1486 | { LEN_AND_STR ("versions"), "display version dependencies", |
3e2040c8 | 1487 | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1488 | { LEN_AND_STR ("all"), "all previous options combined", |
3e2040c8 UD |
1489 | DL_DEBUG_LIBS | DL_DEBUG_RELOC | DL_DEBUG_FILES | DL_DEBUG_SYMBOLS |
1490 | | DL_DEBUG_BINDINGS | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, | |
379d4ec4 | 1491 | { LEN_AND_STR ("statistics"), "display relocation statistics", |
3e2040c8 | 1492 | DL_DEBUG_STATISTICS }, |
379d4ec4 | 1493 | { LEN_AND_STR ("help"), "display this help message and exit", |
3e2040c8 UD |
1494 | DL_DEBUG_HELP }, |
1495 | }; | |
1496 | #define ndebopts (sizeof (debopts) / sizeof (debopts[0])) | |
3e2040c8 | 1497 | |
379d4ec4 UD |
1498 | /* Skip separating white spaces and commas. */ |
1499 | while (*dl_debug != '\0') | |
b5efde2f | 1500 | { |
379d4ec4 | 1501 | if (*dl_debug != ' ' && *dl_debug != ',' && *dl_debug != ':') |
b5efde2f | 1502 | { |
3e2040c8 | 1503 | size_t cnt; |
379d4ec4 | 1504 | size_t len = 1; |
77aba05b | 1505 | |
379d4ec4 UD |
1506 | while (dl_debug[len] != '\0' && dl_debug[len] != ' ' |
1507 | && dl_debug[len] != ',' && dl_debug[len] != ':') | |
1508 | ++len; | |
14c44e2e | 1509 | |
3e2040c8 | 1510 | for (cnt = 0; cnt < ndebopts; ++cnt) |
379d4ec4 UD |
1511 | if (debopts[cnt].len == len |
1512 | && memcmp (dl_debug, debopts[cnt].name, len) == 0) | |
3e2040c8 | 1513 | { |
d6b5d570 | 1514 | GL(dl_debug_mask) |= debopts[cnt].mask; |
5688da55 | 1515 | any_debug = 1; |
3e2040c8 UD |
1516 | break; |
1517 | } | |
77aba05b | 1518 | |
3e2040c8 UD |
1519 | if (cnt == ndebopts) |
1520 | { | |
1521 | /* Display a warning and skip everything until next | |
1522 | separator. */ | |
1523 | char *copy = strndupa (dl_debug, len); | |
1524 | _dl_error_printf ("\ | |
1525 | warning: debug option `%s' unknown; try LD_DEBUG=help\n", copy); | |
379d4ec4 UD |
1526 | } |
1527 | ||
1528 | dl_debug += len; | |
1529 | continue; | |
3e2040c8 | 1530 | } |
379d4ec4 UD |
1531 | |
1532 | ++dl_debug; | |
3e2040c8 | 1533 | } |
77aba05b | 1534 | |
d6b5d570 | 1535 | if (GL(dl_debug_mask) & DL_DEBUG_HELP) |
3e2040c8 UD |
1536 | { |
1537 | size_t cnt; | |
14c44e2e | 1538 | |
3e2040c8 UD |
1539 | _dl_printf ("\ |
1540 | Valid options for the LD_DEBUG environment variable are:\n\n"); | |
db276fa1 | 1541 | |
3e2040c8 | 1542 | for (cnt = 0; cnt < ndebopts; ++cnt) |
37d8b778 UD |
1543 | _dl_printf (" %.*s%s%s\n", debopts[cnt].len, debopts[cnt].name, |
1544 | " " + debopts[cnt].len - 3, | |
3e2040c8 | 1545 | debopts[cnt].helptext); |
14c44e2e | 1546 | |
3e2040c8 UD |
1547 | _dl_printf ("\n\ |
1548 | To direct the debugging output into a file instead of standard output\n\ | |
1549 | a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n"); | |
1550 | _exit (0); | |
b5efde2f | 1551 | } |
b5efde2f UD |
1552 | } |
1553 | \f | |
ea278354 UD |
1554 | /* Process all environments variables the dynamic linker must recognize. |
1555 | Since all of them start with `LD_' we are a bit smarter while finding | |
1556 | all the entries. */ | |
67c94753 UD |
1557 | extern char **_environ; |
1558 | ||
d6b5d570 | 1559 | |
ea278354 | 1560 | static void |
ba9fcb3f | 1561 | process_envvars (enum mode *modep) |
ea278354 | 1562 | { |
67c94753 | 1563 | char **runp = _environ; |
ea278354 UD |
1564 | char *envline; |
1565 | enum mode mode = normal; | |
7dea968e | 1566 | char *debug_output = NULL; |
ea278354 UD |
1567 | |
1568 | /* This is the default place for profiling data file. */ | |
d6b5d570 UD |
1569 | GL(dl_profile_output) = &"/var/tmp\0/var/profile"[__libc_enable_secure |
1570 | ? 9 : 0]; | |
ea278354 UD |
1571 | |
1572 | while ((envline = _dl_next_ld_env_entry (&runp)) != NULL) | |
1573 | { | |
379d4ec4 UD |
1574 | size_t len = 0; |
1575 | ||
1576 | while (envline[len] != '\0' && envline[len] != '=') | |
1577 | ++len; | |
ea278354 | 1578 | |
75e8d1f5 UD |
1579 | if (envline[len] != '=') |
1580 | /* This is a "LD_" variable at the end of the string without | |
1581 | a '=' character. Ignore it since otherwise we will access | |
1582 | invalid memory below. */ | |
67c94753 | 1583 | continue; |
75e8d1f5 | 1584 | |
67c94753 | 1585 | switch (len) |
ea278354 | 1586 | { |
14c44e2e UD |
1587 | case 4: |
1588 | /* Warning level, verbose or not. */ | |
67c94753 | 1589 | if (memcmp (envline, "WARN", 4) == 0) |
d6b5d570 | 1590 | GL(dl_verbose) = envline[5] != '\0'; |
14c44e2e | 1591 | break; |
ea278354 | 1592 | |
14c44e2e UD |
1593 | case 5: |
1594 | /* Debugging of the dynamic linker? */ | |
67c94753 UD |
1595 | if (memcmp (envline, "DEBUG", 5) == 0) |
1596 | process_dl_debug (&envline[6]); | |
14c44e2e | 1597 | break; |
b5efde2f | 1598 | |
14c44e2e UD |
1599 | case 7: |
1600 | /* Print information about versions. */ | |
67c94753 | 1601 | if (memcmp (envline, "VERBOSE", 7) == 0) |
14c44e2e | 1602 | { |
67c94753 | 1603 | version_info = envline[8] != '\0'; |
14c44e2e UD |
1604 | break; |
1605 | } | |
7dea968e | 1606 | |
14c44e2e | 1607 | /* List of objects to be preloaded. */ |
67c94753 | 1608 | if (memcmp (envline, "PRELOAD", 7) == 0) |
14c44e2e | 1609 | { |
67c94753 | 1610 | preloadlist = &envline[8]; |
14c44e2e UD |
1611 | break; |
1612 | } | |
120b4c49 | 1613 | |
14c44e2e | 1614 | /* Which shared object shall be profiled. */ |
c95f3fd4 | 1615 | if (memcmp (envline, "PROFILE", 7) == 0 && envline[8] != '\0') |
d6b5d570 | 1616 | GL(dl_profile) = &envline[8]; |
14c44e2e | 1617 | break; |
120b4c49 | 1618 | |
14c44e2e UD |
1619 | case 8: |
1620 | /* Do we bind early? */ | |
67c94753 | 1621 | if (memcmp (envline, "BIND_NOW", 8) == 0) |
f53c03c2 | 1622 | { |
5688da55 | 1623 | GL(dl_lazy) = envline[9] == '\0'; |
f53c03c2 UD |
1624 | break; |
1625 | } | |
67c94753 | 1626 | if (memcmp (envline, "BIND_NOT", 8) == 0) |
d6b5d570 | 1627 | GL(dl_bind_not) = envline[9] != '\0'; |
14c44e2e | 1628 | break; |
ea278354 | 1629 | |
14c44e2e UD |
1630 | case 9: |
1631 | /* Test whether we want to see the content of the auxiliary | |
1632 | array passed up from the kernel. */ | |
67c94753 | 1633 | if (memcmp (envline, "SHOW_AUXV", 9) == 0) |
14c44e2e UD |
1634 | _dl_show_auxv (); |
1635 | break; | |
ea278354 | 1636 | |
12264bd7 | 1637 | case 10: |
3081378b | 1638 | /* Mask for the important hardware capabilities. */ |
67c94753 | 1639 | if (memcmp (envline, "HWCAP_MASK", 10) == 0) |
d6b5d570 | 1640 | GL(dl_hwcap_mask) = __strtoul_internal (&envline[11], NULL, 0, 0); |
12264bd7 UD |
1641 | break; |
1642 | ||
f787edde UD |
1643 | case 11: |
1644 | /* Path where the binary is found. */ | |
45769315 | 1645 | if (!__libc_enable_secure |
67c94753 | 1646 | && memcmp (envline, "ORIGIN_PATH", 11) == 0) |
d6b5d570 | 1647 | GL(dl_origin_path) = &envline[12]; |
f787edde UD |
1648 | break; |
1649 | ||
14c44e2e | 1650 | case 12: |
dec126b4 | 1651 | /* The library search path. */ |
67c94753 | 1652 | if (memcmp (envline, "LIBRARY_PATH", 12) == 0) |
dec126b4 | 1653 | { |
67c94753 | 1654 | library_path = &envline[13]; |
dec126b4 UD |
1655 | break; |
1656 | } | |
1657 | ||
14c44e2e | 1658 | /* Where to place the profiling data file. */ |
67c94753 | 1659 | if (memcmp (envline, "DEBUG_OUTPUT", 12) == 0) |
14c44e2e | 1660 | { |
67c94753 | 1661 | debug_output = &envline[13]; |
14c44e2e UD |
1662 | break; |
1663 | } | |
ea278354 | 1664 | |
67c94753 | 1665 | if (memcmp (envline, "DYNAMIC_WEAK", 12) == 0) |
5688da55 | 1666 | GL(dl_dynamic_weak) = 1; |
14c44e2e | 1667 | break; |
ea278354 | 1668 | |
14c44e2e UD |
1669 | case 14: |
1670 | /* Where to place the profiling data file. */ | |
3081378b | 1671 | if (!__libc_enable_secure |
3e2040c8 UD |
1672 | && memcmp (envline, "PROFILE_OUTPUT", 14) == 0 |
1673 | && envline[15] != '\0') | |
d6b5d570 | 1674 | GL(dl_profile_output) = &envline[15]; |
14c44e2e | 1675 | break; |
120b4c49 | 1676 | |
32e6df36 UD |
1677 | case 16: |
1678 | /* The mode of the dynamic linker can be set. */ | |
1679 | if (memcmp (envline, "TRACE_PRELINKING", 16) == 0) | |
1680 | { | |
1681 | mode = trace; | |
d6b5d570 UD |
1682 | GL(dl_verbose) = 1; |
1683 | GL(dl_debug_mask) |= DL_DEBUG_PRELINK; | |
1684 | GL(dl_trace_prelink) = &envline[17]; | |
32e6df36 UD |
1685 | } |
1686 | break; | |
1687 | ||
14c44e2e UD |
1688 | case 20: |
1689 | /* The mode of the dynamic linker can be set. */ | |
67c94753 | 1690 | if (memcmp (envline, "TRACE_LOADED_OBJECTS", 20) == 0) |
14c44e2e UD |
1691 | mode = trace; |
1692 | break; | |
e2102c14 UD |
1693 | |
1694 | /* We might have some extra environment variable to handle. This | |
1695 | is tricky due to the pre-processing of the length of the name | |
1696 | in the switch statement here. The code here assumes that added | |
1697 | environment variables have a different length. */ | |
1698 | #ifdef EXTRA_LD_ENVVARS | |
1699 | EXTRA_LD_ENVVARS | |
1700 | #endif | |
ea278354 UD |
1701 | } |
1702 | } | |
1703 | ||
3e2040c8 UD |
1704 | /* The caller wants this information. */ |
1705 | *modep = mode; | |
1706 | ||
4bae5567 UD |
1707 | /* Extra security for SUID binaries. Remove all dangerous environment |
1708 | variables. */ | |
ba9fcb3f | 1709 | if (__builtin_expect (__libc_enable_secure, 0)) |
4bae5567 | 1710 | { |
c95f3fd4 | 1711 | static const char unsecure_envvars[] = |
4bae5567 UD |
1712 | #ifdef EXTRA_UNSECURE_ENVVARS |
1713 | EXTRA_UNSECURE_ENVVARS | |
1714 | #endif | |
c95f3fd4 UD |
1715 | UNSECURE_ENVVARS; |
1716 | const char *nextp; | |
1717 | ||
1718 | nextp = unsecure_envvars; | |
1719 | do | |
1720 | { | |
1721 | unsetenv (nextp); | |
9710f75d UD |
1722 | /* We could use rawmemchr but this need not be fast. */ |
1723 | nextp = (char *) (strchr) (nextp, '\0') + 1; | |
c95f3fd4 UD |
1724 | } |
1725 | while (*nextp != '\0'); | |
74955460 UD |
1726 | |
1727 | if (__access ("/etc/suid-debug", F_OK) != 0) | |
1728 | unsetenv ("MALLOC_CHECK_"); | |
4bae5567 | 1729 | } |
7dea968e UD |
1730 | /* If we have to run the dynamic linker in debugging mode and the |
1731 | LD_DEBUG_OUTPUT environment variable is given, we write the debug | |
1732 | messages to this file. */ | |
3e2040c8 | 1733 | else if (any_debug && debug_output != NULL) |
7dea968e | 1734 | { |
5f2de337 UD |
1735 | #ifdef O_NOFOLLOW |
1736 | const int flags = O_WRONLY | O_APPEND | O_CREAT | O_NOFOLLOW; | |
1737 | #else | |
1738 | const int flags = O_WRONLY | O_APPEND | O_CREAT; | |
1739 | #endif | |
7a2fd787 UD |
1740 | size_t name_len = strlen (debug_output); |
1741 | char buf[name_len + 12]; | |
1742 | char *startp; | |
1743 | ||
1744 | buf[name_len + 11] = '\0'; | |
9710f75d | 1745 | startp = _itoa (__getpid (), &buf[name_len + 11], 10, 0); |
7a2fd787 UD |
1746 | *--startp = '.'; |
1747 | startp = memcpy (startp - name_len, debug_output, name_len); | |
1748 | ||
5688da55 UD |
1749 | GL(dl_debug_fd) = __open (startp, flags, DEFFILEMODE); |
1750 | if (GL(dl_debug_fd) == -1) | |
7dea968e | 1751 | /* We use standard output if opening the file failed. */ |
5688da55 | 1752 | GL(dl_debug_fd) = STDOUT_FILENO; |
7dea968e | 1753 | } |
ea278354 | 1754 | } |
db276fa1 UD |
1755 | |
1756 | ||
1757 | /* Print the various times we collected. */ | |
1758 | static void | |
1759 | print_statistics (void) | |
1760 | { | |
8b07d6a8 | 1761 | #ifndef HP_TIMING_NONAVAIL |
f457369d | 1762 | char buf[200]; |
db276fa1 UD |
1763 | char *cp; |
1764 | char *wp; | |
1765 | ||
1766 | /* Total time rtld used. */ | |
1767 | if (HP_TIMING_AVAIL) | |
1768 | { | |
1769 | HP_TIMING_PRINT (buf, sizeof (buf), rtld_total_time); | |
cff26a3e AJ |
1770 | INTUSE(_dl_debug_printf) ("\nruntime linker statistics:\n" |
1771 | " total startup time in dynamic loader: %s\n", | |
1772 | buf); | |
db276fa1 UD |
1773 | } |
1774 | ||
1775 | /* Print relocation statistics. */ | |
1776 | if (HP_TIMING_AVAIL) | |
1777 | { | |
35fc382a | 1778 | char pbuf[30]; |
db276fa1 | 1779 | HP_TIMING_PRINT (buf, sizeof (buf), relocate_time); |
9710f75d UD |
1780 | cp = _itoa ((1000ULL * relocate_time) / rtld_total_time, |
1781 | pbuf + sizeof (pbuf), 10, 0); | |
35fc382a UD |
1782 | wp = pbuf; |
1783 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
1784 | { |
1785 | case 3: | |
1786 | *wp++ = *cp++; | |
1787 | case 2: | |
1788 | *wp++ = *cp++; | |
1789 | case 1: | |
1790 | *wp++ = '.'; | |
1791 | *wp++ = *cp++; | |
1792 | } | |
1793 | *wp = '\0'; | |
cff26a3e | 1794 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 1795 | time needed for relocation: %s (%s%%)\n", |
cff26a3e | 1796 | buf, pbuf); |
db276fa1 | 1797 | } |
1531e094 | 1798 | #endif |
cff26a3e AJ |
1799 | INTUSE(_dl_debug_printf) (" number of relocations: %lu\n", |
1800 | GL(dl_num_relocations)); | |
1801 | INTUSE(_dl_debug_printf) (" number of relocations from cache: %lu\n", | |
1802 | GL(dl_num_cache_relocations)); | |
db276fa1 | 1803 | |
1531e094 | 1804 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
1805 | /* Time spend while loading the object and the dependencies. */ |
1806 | if (HP_TIMING_AVAIL) | |
1807 | { | |
35fc382a | 1808 | char pbuf[30]; |
db276fa1 | 1809 | HP_TIMING_PRINT (buf, sizeof (buf), load_time); |
9710f75d UD |
1810 | cp = _itoa ((1000ULL * load_time) / rtld_total_time, |
1811 | pbuf + sizeof (pbuf), 10, 0); | |
35fc382a UD |
1812 | wp = pbuf; |
1813 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
1814 | { |
1815 | case 3: | |
1816 | *wp++ = *cp++; | |
1817 | case 2: | |
1818 | *wp++ = *cp++; | |
1819 | case 1: | |
1820 | *wp++ = '.'; | |
1821 | *wp++ = *cp++; | |
1822 | } | |
1823 | *wp = '\0'; | |
cff26a3e | 1824 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 1825 | time needed to load objects: %s (%s%%)\n", |
cff26a3e | 1826 | buf, pbuf); |
db276fa1 | 1827 | } |
1531e094 | 1828 | #endif |
db276fa1 | 1829 | } |