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d66e34cd | 1 | /* Run time dynamic linker. |
e9c7764e | 2 | Copyright (C) 1995-2002, 2003 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 | |
7d0b1164 | 20 | #include <errno.h> |
7dea968e | 21 | #include <fcntl.h> |
164a7164 | 22 | #include <stdbool.h> |
d66e34cd | 23 | #include <stdlib.h> |
f51d1dfd | 24 | #include <string.h> |
d66e34cd | 25 | #include <unistd.h> |
2064087b | 26 | #include <sys/mman.h> /* Check if MAP_ANON is defined. */ |
af8bf6bd | 27 | #include <sys/param.h> |
ba9fcb3f | 28 | #include <sys/stat.h> |
a42195db | 29 | #include <ldsodefs.h> |
ce37fa88 | 30 | #include <stdio-common/_itoa.h> |
f21acc89 | 31 | #include <entry.h> |
c94a8080 | 32 | #include <fpu_control.h> |
db276fa1 | 33 | #include <hp-timing.h> |
cf197e41 | 34 | #include <bits/libc-lock.h> |
f5348425 | 35 | #include "dynamic-link.h" |
e2102c14 | 36 | #include "dl-librecon.h" |
74955460 | 37 | #include <unsecvars.h> |
5688da55 UD |
38 | #include <dl-cache.h> |
39 | #include <dl-procinfo.h> | |
5f5843e3 | 40 | #include <tls.h> |
f5348425 | 41 | |
a853022c | 42 | #include <assert.h> |
f5348425 | 43 | |
6ce3881d RM |
44 | /* Avoid PLT use for our local calls at startup. */ |
45 | extern __typeof (__mempcpy) __mempcpy attribute_hidden; | |
46 | ||
47 | /* GCC has mental blocks about _exit. */ | |
48 | extern __typeof (_exit) exit_internal asm ("_exit") attribute_hidden; | |
49 | #define _exit exit_internal | |
50 | ||
fd26970f | 51 | /* Helper function to handle errors while resolving symbols. */ |
c84142e8 UD |
52 | static void print_unresolved (int errcode, const char *objname, |
53 | const char *errsting); | |
54 | ||
55 | /* Helper function to handle errors when a version is missing. */ | |
56 | static void print_missing_version (int errcode, const char *objname, | |
57 | const char *errsting); | |
fd26970f | 58 | |
db276fa1 UD |
59 | /* Print the various times we collected. */ |
60 | static void print_statistics (void); | |
ea278354 UD |
61 | |
62 | /* This is a list of all the modes the dynamic loader can be in. */ | |
63 | enum mode { normal, list, verify, trace }; | |
64 | ||
65 | /* Process all environments variables the dynamic linker must recognize. | |
66 | Since all of them start with `LD_' we are a bit smarter while finding | |
67 | all the entries. */ | |
ba9fcb3f | 68 | static void process_envvars (enum mode *modep); |
ea278354 | 69 | |
5c82e15e | 70 | int _dl_argc attribute_hidden; |
e6caf4e1 UD |
71 | char **_dl_argv = NULL; |
72 | INTDEF(_dl_argv) | |
5c82e15e UD |
73 | |
74 | /* Nonzero if we were run directly. */ | |
75 | unsigned int _dl_skip_args attribute_hidden; | |
cf197e41 | 76 | |
39778c6c UD |
77 | /* Set nonzero during loading and initialization of executable and |
78 | libraries, cleared before the executable's entry point runs. This | |
79 | must not be initialized to nonzero, because the unused dynamic | |
80 | linker loaded in for libc.so's "ld.so.1" dep will provide the | |
81 | definition seen by libc.so's initializer; that value must be zero, | |
82 | and will be since that dynamic linker's _dl_start and dl_main will | |
83 | never be called. */ | |
e6caf4e1 UD |
84 | int _dl_starting_up = 0; |
85 | INTVARDEF(_dl_starting_up) | |
39778c6c | 86 | |
d6b5d570 UD |
87 | /* This is the structure which defines all variables global to ld.so |
88 | (except those which cannot be added for some reason). */ | |
5688da55 UD |
89 | struct rtld_global _rtld_global = |
90 | { | |
ccdf0cab UD |
91 | /* Get architecture specific initializer. */ |
92 | #include <dl-procinfo.c> | |
5688da55 | 93 | ._dl_debug_fd = STDERR_FILENO, |
5e289179 UD |
94 | #ifdef NEED_DL_SYSINFO |
95 | ._dl_sysinfo = DL_SYSINFO_DEFAULT, | |
5688da55 UD |
96 | #endif |
97 | ._dl_lazy = 1, | |
97fd3a30 | 98 | ._dl_use_load_bias = -2, |
5688da55 UD |
99 | ._dl_fpu_control = _FPU_DEFAULT, |
100 | ._dl_correct_cache_id = _DL_CACHE_DEFAULT_ID, | |
101 | ._dl_hwcap_mask = HWCAP_IMPORTANT, | |
ecdeaac0 RM |
102 | /* Default presumption without further information is executable stack. */ |
103 | ._dl_stack_flags = PF_R|PF_W|PF_X, | |
ffa8d2a0 | 104 | #ifdef _LIBC_REENTRANT |
d3c9f895 | 105 | ._dl_load_lock = _RTLD_LOCK_RECURSIVE_INITIALIZER |
ffa8d2a0 | 106 | #endif |
5688da55 | 107 | }; |
27a754a9 UD |
108 | /* If we would use strong_alias here the compiler would see a |
109 | non-hidden definition. This would undo the effect of the previous | |
110 | declaration. So spell out was strong_alias does plus add the | |
111 | visibility attribute. */ | |
112 | extern struct rtld_global _rtld_local | |
113 | __attribute__ ((alias ("_rtld_global"), visibility ("hidden"))); | |
c0fb8a56 | 114 | |
67ddea92 | 115 | static void dl_main (const ElfW(Phdr) *phdr, ElfW(Word) phnum, |
266180eb | 116 | ElfW(Addr) *user_entry); |
d66e34cd | 117 | |
d6b5d570 UD |
118 | static struct libname_list _dl_rtld_libname; |
119 | static struct libname_list _dl_rtld_libname2; | |
86d2c878 | 120 | |
eaad82e0 UD |
121 | /* We expect less than a second for relocation. */ |
122 | #ifdef HP_SMALL_TIMING_AVAIL | |
123 | # undef HP_TIMING_AVAIL | |
124 | # define HP_TIMING_AVAIL HP_SMALL_TIMING_AVAIL | |
125 | #endif | |
126 | ||
db276fa1 | 127 | /* Variable for statistics. */ |
5732c4df | 128 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
129 | static hp_timing_t rtld_total_time; |
130 | static hp_timing_t relocate_time; | |
131 | static hp_timing_t load_time; | |
01d8e36d | 132 | static hp_timing_t start_time; |
5732c4df | 133 | #endif |
db276fa1 | 134 | |
2a76f7ef UD |
135 | /* Additional definitions needed by TLS initialization. */ |
136 | #ifdef TLS_INIT_HELPER | |
137 | TLS_INIT_HELPER | |
5e289179 UD |
138 | #endif |
139 | ||
140 | /* Helper function for syscall implementation. */ | |
141 | #ifdef DL_SYSINFO_IMPLEMENTATION | |
142 | DL_SYSINFO_IMPLEMENTATION | |
2a76f7ef UD |
143 | #endif |
144 | ||
01d8e36d UD |
145 | /* Before ld.so is relocated we must not access variables which need |
146 | relocations. This means variables which are exported. Variables | |
147 | declared as static are fine. If we can mark a variable hidden this | |
27a754a9 | 148 | is fine, too. The latter is important here. We can avoid setting |
01d8e36d UD |
149 | up a temporary link map for ld.so if we can mark _rtld_global as |
150 | hidden. */ | |
9df89390 UD |
151 | #if defined PI_STATIC_AND_HIDDEN && defined HAVE_HIDDEN \ |
152 | && defined HAVE_VISIBILITY_ATTRIBUTE | |
01d8e36d UD |
153 | # define DONT_USE_BOOTSTRAP_MAP 1 |
154 | #endif | |
155 | ||
156 | #ifdef DONT_USE_BOOTSTRAP_MAP | |
157 | static ElfW(Addr) _dl_start_final (void *arg); | |
158 | #else | |
4874b009 RM |
159 | struct dl_start_final_info |
160 | { | |
161 | struct link_map l; | |
162 | #if !defined HP_TIMING_NONAVAIL && HP_TIMING_INLINE | |
163 | hp_timing_t start_time; | |
164 | #endif | |
165 | }; | |
01d8e36d | 166 | static ElfW(Addr) _dl_start_final (void *arg, |
4874b009 | 167 | struct dl_start_final_info *info); |
01d8e36d | 168 | #endif |
6a1db4ff | 169 | |
65da9563 RM |
170 | /* These defined magically in the linker script. */ |
171 | extern char _begin[] attribute_hidden; | |
172 | extern char _end[] attribute_hidden; | |
173 | ||
174 | ||
b1dbbaa4 RM |
175 | #ifdef RTLD_START |
176 | RTLD_START | |
177 | #else | |
eaad82e0 | 178 | # error "sysdeps/MACHINE/dl-machine.h fails to define RTLD_START" |
b1dbbaa4 RM |
179 | #endif |
180 | ||
c2248c44 RM |
181 | #ifndef VALIDX |
182 | # define VALIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ | |
183 | + DT_EXTRANUM + DT_VALTAGIDX (tag)) | |
184 | #endif | |
185 | #ifndef ADDRIDX | |
186 | # define ADDRIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \ | |
187 | + DT_EXTRANUM + DT_VALNUM + DT_ADDRTAGIDX (tag)) | |
188 | #endif | |
189 | ||
190 | /* This is the second half of _dl_start (below). It can be inlined safely | |
191 | under DONT_USE_BOOTSTRAP_MAP, where it is careful not to make any GOT | |
192 | references. When the tools don't permit us to avoid using a GOT entry | |
193 | for _dl_rtld_global (no attribute_hidden support), we must make sure | |
194 | this function is not inlined (see below). */ | |
195 | ||
196 | #ifdef DONT_USE_BOOTSTRAP_MAP | |
197 | static inline ElfW(Addr) __attribute__ ((always_inline)) | |
198 | _dl_start_final (void *arg) | |
199 | #else | |
200 | static ElfW(Addr) __attribute__ ((noinline)) | |
4874b009 | 201 | _dl_start_final (void *arg, struct dl_start_final_info *info) |
c2248c44 RM |
202 | #endif |
203 | { | |
204 | ElfW(Addr) start_addr; | |
c2248c44 RM |
205 | |
206 | if (HP_TIMING_AVAIL) | |
207 | { | |
208 | /* If it hasn't happen yet record the startup time. */ | |
209 | if (! HP_TIMING_INLINE) | |
210 | HP_TIMING_NOW (start_time); | |
735d67f2 | 211 | #if !defined DONT_USE_BOOTSTRAP_MAP && !defined HP_TIMING_NONAVAIL |
4874b009 RM |
212 | else |
213 | start_time = info->start_time; | |
214 | #endif | |
c2248c44 RM |
215 | |
216 | /* Initialize the timing functions. */ | |
217 | HP_TIMING_DIFF_INIT (); | |
218 | } | |
219 | ||
220 | /* Transfer data about ourselves to the permanent link_map structure. */ | |
221 | #ifndef DONT_USE_BOOTSTRAP_MAP | |
4874b009 RM |
222 | GL(dl_rtld_map).l_addr = info->l.l_addr; |
223 | GL(dl_rtld_map).l_ld = info->l.l_ld; | |
224 | memcpy (GL(dl_rtld_map).l_info, info->l.l_info, | |
c2248c44 | 225 | sizeof GL(dl_rtld_map).l_info); |
4874b009 | 226 | GL(dl_rtld_map).l_mach = info->l.l_mach; |
c2248c44 RM |
227 | #endif |
228 | _dl_setup_hash (&GL(dl_rtld_map)); | |
229 | GL(dl_rtld_map).l_opencount = 1; | |
230 | GL(dl_rtld_map).l_map_start = (ElfW(Addr)) _begin; | |
231 | GL(dl_rtld_map).l_map_end = (ElfW(Addr)) _end; | |
232 | /* Copy the TLS related data if necessary. */ | |
233 | #if USE_TLS && !defined DONT_USE_BOOTSTRAP_MAP | |
ce460d04 | 234 | # if USE___THREAD |
4874b009 | 235 | assert (info->l.l_tls_modid != 0); |
ce460d04 RM |
236 | GL(dl_rtld_map).l_tls_blocksize = info->l.l_tls_blocksize; |
237 | GL(dl_rtld_map).l_tls_align = info->l.l_tls_align; | |
99fe3b0e | 238 | GL(dl_rtld_map).l_tls_firstbyte_offset = info->l.l_tls_firstbyte_offset; |
ce460d04 RM |
239 | GL(dl_rtld_map).l_tls_initimage_size = info->l.l_tls_initimage_size; |
240 | GL(dl_rtld_map).l_tls_initimage = info->l.l_tls_initimage; | |
241 | GL(dl_rtld_map).l_tls_offset = info->l.l_tls_offset; | |
242 | GL(dl_rtld_map).l_tls_modid = 1; | |
c2248c44 | 243 | # else |
ce460d04 | 244 | assert (info->l.l_tls_modid == 0); |
299601a1 UD |
245 | # if NO_TLS_OFFSET != 0 |
246 | GL(dl_rtld_map).l_tls_offset = NO_TLS_OFFSET; | |
247 | # endif | |
c2248c44 | 248 | # endif |
ce460d04 | 249 | |
c2248c44 RM |
250 | #endif |
251 | ||
252 | #if HP_TIMING_AVAIL | |
253 | HP_TIMING_NOW (GL(dl_cpuclock_offset)); | |
254 | #endif | |
255 | ||
256 | /* Call the OS-dependent function to set up life so we can do things like | |
257 | file access. It will call `dl_main' (below) to do all the real work | |
258 | of the dynamic linker, and then unwind our frame and run the user | |
259 | entry point on the same stack we entered on. */ | |
ecdeaac0 | 260 | start_addr = _dl_sysdep_start (arg, &dl_main); |
c2248c44 RM |
261 | |
262 | #ifndef HP_TIMING_NONAVAIL | |
263 | if (HP_TIMING_AVAIL) | |
264 | { | |
265 | hp_timing_t end_time; | |
266 | ||
267 | /* Get the current time. */ | |
268 | HP_TIMING_NOW (end_time); | |
269 | ||
270 | /* Compute the difference. */ | |
271 | HP_TIMING_DIFF (rtld_total_time, start_time, end_time); | |
272 | } | |
273 | #endif | |
274 | ||
275 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_STATISTICS, 0)) | |
276 | print_statistics (); | |
277 | ||
278 | return start_addr; | |
279 | } | |
280 | ||
50746436 | 281 | static ElfW(Addr) __attribute_used__ internal_function |
d66e34cd RM |
282 | _dl_start (void *arg) |
283 | { | |
01d8e36d UD |
284 | #ifdef DONT_USE_BOOTSTRAP_MAP |
285 | # define bootstrap_map GL(dl_rtld_map) | |
286 | #else | |
4874b009 RM |
287 | struct dl_start_final_info info; |
288 | # define bootstrap_map info.l | |
739d440d | 289 | #endif |
d66e34cd | 290 | |
b1dbbaa4 RM |
291 | /* This #define produces dynamic linking inline functions for |
292 | bootstrap relocation instead of general-purpose relocation. */ | |
293 | #define RTLD_BOOTSTRAP | |
c0282c06 UD |
294 | #define RESOLVE_MAP(sym, version, flags) \ |
295 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : &bootstrap_map) | |
50463d27 UD |
296 | #define RESOLVE(sym, version, flags) \ |
297 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : bootstrap_map.l_addr) | |
b1dbbaa4 RM |
298 | #include "dynamic-link.h" |
299 | ||
db276fa1 | 300 | if (HP_TIMING_INLINE && HP_TIMING_AVAIL) |
4874b009 | 301 | #ifdef DONT_USE_BOOTSTRAP_MAP |
db276fa1 | 302 | HP_TIMING_NOW (start_time); |
4874b009 RM |
303 | #else |
304 | HP_TIMING_NOW (info.start_time); | |
305 | #endif | |
db276fa1 | 306 | |
e66d0a4c UD |
307 | /* Partly clean the `bootstrap_map' structure up. Don't use |
308 | `memset' since it might not be built in or inlined and we cannot | |
309 | make function calls at this point. Use '__builtin_memset' if we | |
01d8e36d UD |
310 | know it is available. We do not have to clear the memory if we |
311 | do not have to use the temporary bootstrap_map. Global variables | |
312 | are initialized to zero by default. */ | |
313 | #ifndef DONT_USE_BOOTSTRAP_MAP | |
314 | # ifdef HAVE_BUILTIN_MEMSET | |
e66d0a4c | 315 | __builtin_memset (bootstrap_map.l_info, '\0', sizeof (bootstrap_map.l_info)); |
01d8e36d | 316 | # else |
ce460d04 | 317 | for (size_t cnt = 0; |
264ec183 UD |
318 | cnt < sizeof (bootstrap_map.l_info) / sizeof (bootstrap_map.l_info[0]); |
319 | ++cnt) | |
320 | bootstrap_map.l_info[cnt] = 0; | |
01d8e36d | 321 | # endif |
e66d0a4c | 322 | #endif |
264ec183 | 323 | |
d66e34cd | 324 | /* Figure out the run-time load address of the dynamic linker itself. */ |
86d2c878 | 325 | bootstrap_map.l_addr = elf_machine_load_address (); |
d66e34cd | 326 | |
47707456 UD |
327 | /* Read our own dynamic section and fill in the info array. */ |
328 | bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic (); | |
479aa8ec | 329 | elf_get_dynamic_info (&bootstrap_map, NULL); |
d66e34cd | 330 | |
299601a1 UD |
331 | #if defined USE_TLS && NO_TLS_OFFSET != 0 |
332 | bootstrap_map.l_tls_offset = NO_TLS_OFFSET; | |
333 | #endif | |
334 | ||
ce460d04 | 335 | #if USE___THREAD |
65da9563 RM |
336 | /* Get the dynamic linker's own program header. First we need the ELF |
337 | file header. The `_begin' symbol created by the linker script points | |
338 | to it. When we have something like GOTOFF relocs, we can use a plain | |
339 | reference to find the runtime address. Without that, we have to rely | |
340 | on the `l_addr' value, which is not the value we want when prelinked. */ | |
5f5843e3 | 341 | dtv_t initdtv[3]; |
ce460d04 RM |
342 | ElfW(Ehdr) *ehdr |
343 | # ifdef DONT_USE_BOOTSTRAP_MAP | |
344 | = (ElfW(Ehdr) *) &_begin; | |
345 | # else | |
346 | = (ElfW(Ehdr) *) bootstrap_map.l_addr; | |
347 | # endif | |
348 | ElfW(Phdr) *phdr = (ElfW(Phdr) *) ((void *) ehdr + ehdr->e_phoff); | |
349 | size_t cnt = ehdr->e_phnum; /* PT_TLS is usually the last phdr. */ | |
350 | while (cnt-- > 0) | |
739d440d UD |
351 | if (phdr[cnt].p_type == PT_TLS) |
352 | { | |
353 | void *tlsblock; | |
354 | size_t max_align = MAX (TLS_INIT_TCB_ALIGN, phdr[cnt].p_align); | |
f884de5b | 355 | char *p; |
739d440d UD |
356 | |
357 | bootstrap_map.l_tls_blocksize = phdr[cnt].p_memsz; | |
358 | bootstrap_map.l_tls_align = phdr[cnt].p_align; | |
99fe3b0e UD |
359 | if (phdr[cnt].p_align == 0) |
360 | bootstrap_map.l_tls_firstbyte_offset = 0; | |
361 | else | |
362 | bootstrap_map.l_tls_firstbyte_offset = (phdr[cnt].p_vaddr | |
363 | & (phdr[cnt].p_align - 1)); | |
739d440d UD |
364 | assert (bootstrap_map.l_tls_blocksize != 0); |
365 | bootstrap_map.l_tls_initimage_size = phdr[cnt].p_filesz; | |
366 | bootstrap_map.l_tls_initimage = (void *) (bootstrap_map.l_addr | |
a816b435 | 367 | + phdr[cnt].p_vaddr); |
739d440d UD |
368 | |
369 | /* We can now allocate the initial TLS block. This can happen | |
370 | on the stack. We'll get the final memory later when we | |
371 | know all about the various objects loaded at startup | |
372 | time. */ | |
373 | # if TLS_TCB_AT_TP | |
374 | tlsblock = alloca (roundup (bootstrap_map.l_tls_blocksize, | |
375 | TLS_INIT_TCB_ALIGN) | |
376 | + TLS_INIT_TCB_SIZE | |
377 | + max_align); | |
378 | # elif TLS_DTV_AT_TP | |
379 | tlsblock = alloca (roundup (TLS_INIT_TCB_SIZE, | |
380 | bootstrap_map.l_tls_align) | |
381 | + bootstrap_map.l_tls_blocksize | |
382 | + max_align); | |
383 | # else | |
384 | /* In case a model with a different layout for the TCB and DTV | |
385 | is defined add another #elif here and in the following #ifs. */ | |
386 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
387 | # endif | |
388 | /* Align the TLS block. */ | |
389 | tlsblock = (void *) (((uintptr_t) tlsblock + max_align - 1) | |
390 | & ~(max_align - 1)); | |
391 | ||
392 | /* Initialize the dtv. [0] is the length, [1] the generation | |
393 | counter. */ | |
394 | initdtv[0].counter = 1; | |
395 | initdtv[1].counter = 0; | |
396 | ||
397 | /* Initialize the TLS block. */ | |
398 | # if TLS_TCB_AT_TP | |
399 | initdtv[2].pointer = tlsblock; | |
400 | # elif TLS_DTV_AT_TP | |
401 | bootstrap_map.l_tls_offset = roundup (TLS_INIT_TCB_SIZE, | |
402 | bootstrap_map.l_tls_align); | |
403 | initdtv[2].pointer = (char *) tlsblock + bootstrap_map.l_tls_offset; | |
404 | # else | |
405 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
406 | # endif | |
f884de5b UD |
407 | p = __mempcpy (initdtv[2].pointer, bootstrap_map.l_tls_initimage, |
408 | bootstrap_map.l_tls_initimage_size); | |
409 | # ifdef HAVE_BUILTIN_MEMSET | |
410 | __builtin_memset (p, '\0', (bootstrap_map.l_tls_blocksize | |
411 | - bootstrap_map.l_tls_initimage_size)); | |
412 | # else | |
413 | { | |
414 | size_t remaining = (bootstrap_map.l_tls_blocksize | |
415 | - bootstrap_map.l_tls_initimage_size); | |
416 | while (remaining-- > 0) | |
417 | *p++ = '\0'; | |
418 | } | |
419 | #endif | |
739d440d UD |
420 | |
421 | /* Install the pointer to the dtv. */ | |
422 | ||
423 | /* Initialize the thread pointer. */ | |
424 | # if TLS_TCB_AT_TP | |
425 | bootstrap_map.l_tls_offset | |
426 | = roundup (bootstrap_map.l_tls_blocksize, TLS_INIT_TCB_ALIGN); | |
427 | ||
428 | INSTALL_DTV ((char *) tlsblock + bootstrap_map.l_tls_offset, | |
429 | initdtv); | |
430 | ||
fde89ad0 RM |
431 | const char *lossage = TLS_INIT_TP ((char *) tlsblock |
432 | + bootstrap_map.l_tls_offset, 0); | |
739d440d UD |
433 | # elif TLS_DTV_AT_TP |
434 | INSTALL_DTV (tlsblock, initdtv); | |
fde89ad0 | 435 | const char *lossage = TLS_INIT_TP (tlsblock, 0); |
739d440d UD |
436 | # else |
437 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
438 | # endif | |
fde89ad0 RM |
439 | if (__builtin_expect (lossage != NULL, 0)) |
440 | _dl_fatal_printf ("cannot set up thread-local storage: %s\n", | |
441 | lossage); | |
739d440d UD |
442 | |
443 | /* So far this is module number one. */ | |
444 | bootstrap_map.l_tls_modid = 1; | |
445 | ||
446 | /* There can only be one PT_TLS entry. */ | |
447 | break; | |
448 | } | |
ce460d04 | 449 | #endif /* USE___THREAD */ |
739d440d | 450 | |
d66e34cd | 451 | #ifdef ELF_MACHINE_BEFORE_RTLD_RELOC |
86d2c878 | 452 | ELF_MACHINE_BEFORE_RTLD_RELOC (bootstrap_map.l_info); |
d66e34cd RM |
453 | #endif |
454 | ||
32e6df36 UD |
455 | if (bootstrap_map.l_addr || ! bootstrap_map.l_info[VALIDX(DT_GNU_PRELINKED)]) |
456 | { | |
457 | /* Relocate ourselves so we can do normal function calls and | |
458 | data access using the global offset table. */ | |
459 | ||
460 | ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0); | |
461 | } | |
421f82e5 | 462 | |
ea7eb7e3 UD |
463 | /* Please note that we don't allow profiling of this object and |
464 | therefore need not test whether we have to allocate the array | |
465 | for the relocation results (as done in dl-reloc.c). */ | |
421f82e5 | 466 | |
d66e34cd RM |
467 | /* Now life is sane; we can call functions and access global data. |
468 | Set up to use the operating system facilities, and find out from | |
469 | the operating system's program loader where to find the program | |
6a1db4ff UD |
470 | header table in core. Put the rest of _dl_start into a separate |
471 | function, that way the compiler cannot put accesses to the GOT | |
472 | before ELF_DYNAMIC_RELOCATE. */ | |
c0282c06 | 473 | { |
01d8e36d UD |
474 | #ifdef DONT_USE_BOOTSTRAP_MAP |
475 | ElfW(Addr) entry = _dl_start_final (arg); | |
476 | #else | |
4874b009 | 477 | ElfW(Addr) entry = _dl_start_final (arg, &info); |
01d8e36d | 478 | #endif |
c0282c06 UD |
479 | |
480 | #ifndef ELF_MACHINE_START_ADDRESS | |
481 | # define ELF_MACHINE_START_ADDRESS(map, start) (start) | |
482 | #endif | |
483 | ||
d6b5d570 | 484 | return ELF_MACHINE_START_ADDRESS (GL(dl_loaded), entry); |
c0282c06 | 485 | } |
6a1db4ff UD |
486 | } |
487 | ||
488 | ||
d66e34cd | 489 | |
d66e34cd RM |
490 | /* Now life is peachy; we can do all normal operations. |
491 | On to the real work. */ | |
492 | ||
993b3242 UD |
493 | /* Some helper functions. */ |
494 | ||
495 | /* Arguments to relocate_doit. */ | |
496 | struct relocate_args | |
497 | { | |
498 | struct link_map *l; | |
499 | int lazy; | |
500 | }; | |
501 | ||
502 | struct map_args | |
503 | { | |
504 | /* Argument to map_doit. */ | |
505 | char *str; | |
506 | /* Return value of map_doit. */ | |
507 | struct link_map *main_map; | |
508 | }; | |
509 | ||
510 | /* Arguments to version_check_doit. */ | |
511 | struct version_check_args | |
512 | { | |
993b3242 | 513 | int doexit; |
145b8413 | 514 | int dotrace; |
993b3242 UD |
515 | }; |
516 | ||
517 | static void | |
518 | relocate_doit (void *a) | |
519 | { | |
520 | struct relocate_args *args = (struct relocate_args *) a; | |
521 | ||
cff26a3e | 522 | INTUSE(_dl_relocate_object) (args->l, args->l->l_scope, args->lazy, 0); |
993b3242 UD |
523 | } |
524 | ||
525 | static void | |
526 | map_doit (void *a) | |
527 | { | |
be935610 | 528 | struct map_args *args = (struct map_args *) a; |
476238ab UD |
529 | args->main_map = INTUSE(_dl_map_object) (NULL, args->str, 0, lt_library, 0, |
530 | __RTLD_OPENEXEC); | |
993b3242 UD |
531 | } |
532 | ||
533 | static void | |
534 | version_check_doit (void *a) | |
535 | { | |
be935610 | 536 | struct version_check_args *args = (struct version_check_args *) a; |
d6b5d570 | 537 | if (_dl_check_all_versions (GL(dl_loaded), 1, args->dotrace) && args->doexit) |
993b3242 UD |
538 | /* We cannot start the application. Abort now. */ |
539 | _exit (1); | |
540 | } | |
541 | ||
ce37fa88 UD |
542 | |
543 | static inline struct link_map * | |
544 | find_needed (const char *name) | |
545 | { | |
d6b5d570 | 546 | unsigned int n = GL(dl_loaded)->l_searchlist.r_nlist; |
ce37fa88 | 547 | |
be935610 | 548 | while (n-- > 0) |
d6b5d570 UD |
549 | if (_dl_name_match_p (name, GL(dl_loaded)->l_searchlist.r_list[n])) |
550 | return GL(dl_loaded)->l_searchlist.r_list[n]; | |
ce37fa88 UD |
551 | |
552 | /* Should never happen. */ | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | static int | |
557 | match_version (const char *string, struct link_map *map) | |
558 | { | |
a42195db | 559 | const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
ce37fa88 UD |
560 | ElfW(Verdef) *def; |
561 | ||
b0982c4a | 562 | #define VERDEFTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERDEF)) |
ce37fa88 UD |
563 | if (map->l_info[VERDEFTAG] == NULL) |
564 | /* The file has no symbol versioning. */ | |
565 | return 0; | |
566 | ||
567 | def = (ElfW(Verdef) *) ((char *) map->l_addr | |
568 | + map->l_info[VERDEFTAG]->d_un.d_ptr); | |
569 | while (1) | |
570 | { | |
571 | ElfW(Verdaux) *aux = (ElfW(Verdaux) *) ((char *) def + def->vd_aux); | |
572 | ||
573 | /* Compare the version strings. */ | |
574 | if (strcmp (string, strtab + aux->vda_name) == 0) | |
575 | /* Bingo! */ | |
576 | return 1; | |
577 | ||
578 | /* If no more definitions we failed to find what we want. */ | |
579 | if (def->vd_next == 0) | |
580 | break; | |
581 | ||
582 | /* Next definition. */ | |
583 | def = (ElfW(Verdef) *) ((char *) def + def->vd_next); | |
584 | } | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
bf2cc5fb | 589 | #ifdef _LIBC_REENTRANT |
ce460d04 RM |
590 | /* _dl_error_catch_tsd points to this for the single-threaded case. |
591 | It's reset by the thread library for multithreaded programs. */ | |
216455bc RM |
592 | void ** __attribute__ ((const)) |
593 | _dl_initial_error_catch_tsd (void) | |
ce460d04 RM |
594 | { |
595 | static void *data; | |
596 | return &data; | |
597 | } | |
bf2cc5fb | 598 | #endif |
ce460d04 | 599 | |
334fcf2a UD |
600 | #if defined SHARED && defined _LIBC_REENTRANT \ |
601 | && defined __rtld_lock_default_lock_recursive | |
602 | static void rtld_lock_default_lock_recursive (void *lock) | |
603 | { | |
604 | __rtld_lock_default_lock_recursive (lock); | |
605 | } | |
606 | ||
607 | static void rtld_lock_default_unlock_recursive (void *lock) | |
608 | { | |
609 | __rtld_lock_default_unlock_recursive (lock); | |
610 | } | |
611 | #endif | |
612 | ||
613 | ||
120b4c49 UD |
614 | static const char *library_path; /* The library search path. */ |
615 | static const char *preloadlist; /* The list preloaded objects. */ | |
616 | static int version_info; /* Nonzero if information about | |
617 | versions has to be printed. */ | |
a1a9d215 | 618 | |
d66e34cd | 619 | static void |
266180eb | 620 | dl_main (const ElfW(Phdr) *phdr, |
72f70279 | 621 | ElfW(Word) phnum, |
266180eb | 622 | ElfW(Addr) *user_entry) |
d66e34cd | 623 | { |
266180eb | 624 | const ElfW(Phdr) *ph; |
ea278354 | 625 | enum mode mode; |
2064087b RM |
626 | struct link_map **preloads; |
627 | unsigned int npreloads; | |
14bab8de UD |
628 | size_t file_size; |
629 | char *file; | |
164a7164 | 630 | bool has_interp = false; |
77aba05b | 631 | unsigned int i; |
164a7164 UD |
632 | bool prelinked = false; |
633 | bool rtld_is_main = false; | |
5732c4df | 634 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
635 | hp_timing_t start; |
636 | hp_timing_t stop; | |
637 | hp_timing_t diff; | |
5732c4df | 638 | #endif |
a52d1562 UD |
639 | #ifdef USE_TLS |
640 | void *tcbp; | |
641 | #endif | |
d66e34cd | 642 | |
bf2cc5fb | 643 | #ifdef _LIBC_REENTRANT |
ce460d04 | 644 | /* Explicit initialization since the reloc would just be more work. */ |
216455bc | 645 | GL(dl_error_catch_tsd) = &_dl_initial_error_catch_tsd; |
bf2cc5fb | 646 | #endif |
ce460d04 | 647 | |
adc12574 UD |
648 | #ifdef USE_TLS |
649 | GL(dl_init_static_tls) = &_dl_nothread_init_static_tls; | |
650 | #endif | |
651 | ||
334fcf2a UD |
652 | #if defined SHARED && defined _LIBC_REENTRANT \ |
653 | && defined __rtld_lock_default_lock_recursive | |
654 | GL(dl_rtld_lock_recursive) = rtld_lock_default_lock_recursive; | |
655 | GL(dl_rtld_unlock_recursive) = rtld_lock_default_unlock_recursive; | |
656 | #endif | |
657 | ||
c70ba488 RM |
658 | /* The explicit initialization here is cheaper than processing the reloc |
659 | in the _rtld_local definition's initializer. */ | |
660 | GL(dl_make_stack_executable_hook) = &_dl_make_stack_executable; | |
661 | ||
ea278354 | 662 | /* Process the environment variable which control the behaviour. */ |
ba9fcb3f | 663 | process_envvars (&mode); |
3996f34b | 664 | |
46ec036d | 665 | /* Set up a flag which tells we are just starting. */ |
e6caf4e1 | 666 | INTUSE(_dl_starting_up) = 1; |
46ec036d | 667 | |
a16956f3 | 668 | if (*user_entry == (ElfW(Addr)) ENTRY_POINT) |
0200214b RM |
669 | { |
670 | /* Ho ho. We are not the program interpreter! We are the program | |
671 | itself! This means someone ran ld.so as a command. Well, that | |
672 | might be convenient to do sometimes. We support it by | |
673 | interpreting the args like this: | |
674 | ||
675 | ld.so PROGRAM ARGS... | |
676 | ||
677 | The first argument is the name of a file containing an ELF | |
678 | executable we will load and run with the following arguments. | |
679 | To simplify life here, PROGRAM is searched for using the | |
680 | normal rules for shared objects, rather than $PATH or anything | |
681 | like that. We just load it and use its entry point; we don't | |
682 | pay attention to its PT_INTERP command (we are the interpreter | |
683 | ourselves). This is an easy way to test a new ld.so before | |
684 | installing it. */ | |
164a7164 | 685 | rtld_is_main = true; |
421f82e5 | 686 | |
ffee1316 | 687 | /* Note the place where the dynamic linker actually came from. */ |
e6caf4e1 | 688 | GL(dl_rtld_map).l_name = rtld_progname; |
6a76c115 | 689 | |
fd26970f | 690 | while (_dl_argc > 1) |
e6caf4e1 | 691 | if (! strcmp (INTUSE(_dl_argv)[1], "--list")) |
fd26970f UD |
692 | { |
693 | mode = list; | |
5688da55 | 694 | GL(dl_lazy) = -1; /* This means do no dependency analysis. */ |
61965e9b | 695 | |
fd26970f UD |
696 | ++_dl_skip_args; |
697 | --_dl_argc; | |
e6caf4e1 | 698 | ++INTUSE(_dl_argv); |
fd26970f | 699 | } |
e6caf4e1 | 700 | else if (! strcmp (INTUSE(_dl_argv)[1], "--verify")) |
fd26970f UD |
701 | { |
702 | mode = verify; | |
6a76c115 | 703 | |
fd26970f UD |
704 | ++_dl_skip_args; |
705 | --_dl_argc; | |
e6caf4e1 | 706 | ++INTUSE(_dl_argv); |
fd26970f | 707 | } |
e6caf4e1 UD |
708 | else if (! strcmp (INTUSE(_dl_argv)[1], "--library-path") |
709 | && _dl_argc > 2) | |
880f421f | 710 | { |
e6caf4e1 | 711 | library_path = INTUSE(_dl_argv)[2]; |
880f421f | 712 | |
310930c1 UD |
713 | _dl_skip_args += 2; |
714 | _dl_argc -= 2; | |
e6caf4e1 | 715 | INTUSE(_dl_argv) += 2; |
310930c1 | 716 | } |
e6caf4e1 UD |
717 | else if (! strcmp (INTUSE(_dl_argv)[1], "--inhibit-rpath") |
718 | && _dl_argc > 2) | |
310930c1 | 719 | { |
e6caf4e1 | 720 | GL(dl_inhibit_rpath) = INTUSE(_dl_argv)[2]; |
310930c1 | 721 | |
880f421f UD |
722 | _dl_skip_args += 2; |
723 | _dl_argc -= 2; | |
e6caf4e1 | 724 | INTUSE(_dl_argv) += 2; |
880f421f | 725 | } |
fd26970f UD |
726 | else |
727 | break; | |
d66e34cd | 728 | |
61eb22d3 UD |
729 | /* If we have no further argument the program was called incorrectly. |
730 | Grant the user some education. */ | |
731 | if (_dl_argc < 2) | |
35fc382a | 732 | _dl_fatal_printf ("\ |
2bcf29ba | 733 | Usage: ld.so [OPTION]... EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\ |
61eb22d3 UD |
734 | You have invoked `ld.so', the helper program for shared library executables.\n\ |
735 | This program usually lives in the file `/lib/ld.so', and special directives\n\ | |
736 | in executable files using ELF shared libraries tell the system's program\n\ | |
737 | loader to load the helper program from this file. This helper program loads\n\ | |
738 | the shared libraries needed by the program executable, prepares the program\n\ | |
739 | to run, and runs it. You may invoke this helper program directly from the\n\ | |
740 | command line to load and run an ELF executable file; this is like executing\n\ | |
741 | that file itself, but always uses this helper program from the file you\n\ | |
742 | specified, instead of the helper program file specified in the executable\n\ | |
743 | file you run. This is mostly of use for maintainers to test new versions\n\ | |
2bcf29ba UD |
744 | of this helper program; chances are you did not intend to run this program.\n\ |
745 | \n\ | |
b0a01055 UD |
746 | --list list all dependencies and how they are resolved\n\ |
747 | --verify verify that given object really is a dynamically linked\n\ | |
e8b1163e | 748 | object we can handle\n\ |
b0a01055 UD |
749 | --library-path PATH use given PATH instead of content of the environment\n\ |
750 | variable LD_LIBRARY_PATH\n\ | |
fcf70d41 | 751 | --inhibit-rpath LIST ignore RUNPATH and RPATH information in object names\n\ |
35fc382a | 752 | in LIST\n"); |
61eb22d3 | 753 | |
0200214b RM |
754 | ++_dl_skip_args; |
755 | --_dl_argc; | |
e6caf4e1 | 756 | ++INTUSE(_dl_argv); |
91f62ce6 | 757 | |
da832465 UD |
758 | /* Initialize the data structures for the search paths for shared |
759 | objects. */ | |
760 | _dl_init_paths (library_path); | |
761 | ||
c70ba488 RM |
762 | /* The initialization of _dl_stack_flags done below assumes the |
763 | executable's PT_GNU_STACK may have been honored by the kernel, and | |
764 | so a PT_GNU_STACK with PF_X set means the stack started out with | |
765 | execute permission. However, this is not really true if the | |
766 | dynamic linker is the executable the kernel loaded. For this | |
767 | case, we must reinitialize _dl_stack_flags to match the dynamic | |
768 | linker itself. If the dynamic linker was built with a | |
769 | PT_GNU_STACK, then the kernel may have loaded us with a | |
770 | nonexecutable stack that we will have to make executable when we | |
771 | load the program below unless it has a PT_GNU_STACK indicating | |
772 | nonexecutable stack is ok. */ | |
773 | ||
774 | for (ph = phdr; ph < &phdr[phnum]; ++ph) | |
775 | if (ph->p_type == PT_GNU_STACK) | |
776 | { | |
777 | GL(dl_stack_flags) = ph->p_flags; | |
778 | break; | |
779 | } | |
780 | ||
9a821cf9 | 781 | if (__builtin_expect (mode, normal) == verify) |
2de99474 | 782 | { |
8e17ea58 UD |
783 | const char *objname; |
784 | const char *err_str = NULL; | |
993b3242 | 785 | struct map_args args; |
2de99474 | 786 | |
e6caf4e1 | 787 | args.str = rtld_progname; |
cff26a3e | 788 | (void) INTUSE(_dl_catch_error) (&objname, &err_str, map_doit, &args); |
8e17ea58 | 789 | if (__builtin_expect (err_str != NULL, 0)) |
e6caf4e1 UD |
790 | /* We don't free the returned string, the programs stops |
791 | anyway. */ | |
792 | _exit (EXIT_FAILURE); | |
2de99474 UD |
793 | } |
794 | else | |
db276fa1 UD |
795 | { |
796 | HP_TIMING_NOW (start); | |
5a4b5076 UD |
797 | INTUSE(_dl_map_object) (NULL, rtld_progname, 0, lt_library, 0, |
798 | __RTLD_OPENEXEC); | |
db276fa1 | 799 | HP_TIMING_NOW (stop); |
61e0617a | 800 | |
db276fa1 UD |
801 | HP_TIMING_DIFF (load_time, start, stop); |
802 | } | |
2de99474 | 803 | |
d6b5d570 UD |
804 | phdr = GL(dl_loaded)->l_phdr; |
805 | phnum = GL(dl_loaded)->l_phnum; | |
143e2b96 UD |
806 | /* We overwrite here a pointer to a malloc()ed string. But since |
807 | the malloc() implementation used at this point is the dummy | |
808 | implementations which has no real free() function it does not | |
809 | makes sense to free the old string first. */ | |
d6b5d570 UD |
810 | GL(dl_loaded)->l_name = (char *) ""; |
811 | *user_entry = GL(dl_loaded)->l_entry; | |
0200214b RM |
812 | } |
813 | else | |
814 | { | |
815 | /* Create a link_map for the executable itself. | |
816 | This will be what dlopen on "" returns. */ | |
87c812c2 | 817 | _dl_new_object ((char *) "", "", lt_executable, NULL); |
d6b5d570 | 818 | if (GL(dl_loaded) == NULL) |
35fc382a | 819 | _dl_fatal_printf ("cannot allocate memory for link map\n"); |
d6b5d570 UD |
820 | GL(dl_loaded)->l_phdr = phdr; |
821 | GL(dl_loaded)->l_phnum = phnum; | |
822 | GL(dl_loaded)->l_entry = *user_entry; | |
da832465 | 823 | |
61e0617a UD |
824 | /* At this point we are in a bit of trouble. We would have to |
825 | fill in the values for l_dev and l_ino. But in general we | |
826 | do not know where the file is. We also do not handle AT_EXECFD | |
827 | even if it would be passed up. | |
828 | ||
829 | We leave the values here defined to 0. This is normally no | |
830 | problem as the program code itself is normally no shared | |
831 | object and therefore cannot be loaded dynamically. Nothing | |
832 | prevent the use of dynamic binaries and in these situations | |
833 | we might get problems. We might not be able to find out | |
834 | whether the object is already loaded. But since there is no | |
835 | easy way out and because the dynamic binary must also not | |
836 | have an SONAME we ignore this program for now. If it becomes | |
837 | a problem we can force people using SONAMEs. */ | |
838 | ||
97a51d8a UD |
839 | /* We delay initializing the path structure until we got the dynamic |
840 | information for the program. */ | |
0200214b RM |
841 | } |
842 | ||
d6b5d570 | 843 | GL(dl_loaded)->l_map_end = 0; |
052b6a6c | 844 | /* Perhaps the executable has no PT_LOAD header entries at all. */ |
d6b5d570 | 845 | GL(dl_loaded)->l_map_start = ~0; |
e7beef5f | 846 | /* We opened the file, account for it. */ |
d6b5d570 | 847 | ++GL(dl_loaded)->l_opencount; |
052b6a6c | 848 | |
0200214b | 849 | /* Scan the program header table for the dynamic section. */ |
72f70279 | 850 | for (ph = phdr; ph < &phdr[phnum]; ++ph) |
0200214b RM |
851 | switch (ph->p_type) |
852 | { | |
da832465 UD |
853 | case PT_PHDR: |
854 | /* Find out the load address. */ | |
d6b5d570 | 855 | GL(dl_loaded)->l_addr = (ElfW(Addr)) phdr - ph->p_vaddr; |
da832465 | 856 | break; |
0200214b RM |
857 | case PT_DYNAMIC: |
858 | /* This tells us where to find the dynamic section, | |
859 | which tells us everything we need to do. */ | |
d6b5d570 | 860 | GL(dl_loaded)->l_ld = (void *) GL(dl_loaded)->l_addr + ph->p_vaddr; |
0200214b RM |
861 | break; |
862 | case PT_INTERP: | |
863 | /* This "interpreter segment" was used by the program loader to | |
864 | find the program interpreter, which is this program itself, the | |
865 | dynamic linker. We note what name finds us, so that a future | |
866 | dlopen call or DT_NEEDED entry, for something that wants to link | |
867 | against the dynamic linker as a shared library, will know that | |
868 | the shared object is already loaded. */ | |
d6b5d570 | 869 | _dl_rtld_libname.name = ((const char *) GL(dl_loaded)->l_addr |
be935610 | 870 | + ph->p_vaddr); |
752a2a50 | 871 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 872 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
f41c8091 UD |
873 | |
874 | /* Ordinarilly, we would get additional names for the loader from | |
875 | our DT_SONAME. This can't happen if we were actually linked as | |
876 | a static executable (detect this case when we have no DYNAMIC). | |
877 | If so, assume the filename component of the interpreter path to | |
878 | be our SONAME, and add it to our name list. */ | |
d6b5d570 | 879 | if (GL(dl_rtld_map).l_ld == NULL) |
f41c8091 | 880 | { |
88794e30 UD |
881 | const char *p = NULL; |
882 | const char *cp = _dl_rtld_libname.name; | |
883 | ||
884 | /* Find the filename part of the path. */ | |
885 | while (*cp != '\0') | |
886 | if (*cp++ == '/') | |
887 | p = cp; | |
888 | ||
889 | if (p != NULL) | |
f41c8091 | 890 | { |
88794e30 | 891 | _dl_rtld_libname2.name = p; |
752a2a50 | 892 | /* _dl_rtld_libname2.next = NULL; Already zero. */ |
f41c8091 UD |
893 | _dl_rtld_libname.next = &_dl_rtld_libname2; |
894 | } | |
895 | } | |
896 | ||
164a7164 | 897 | has_interp = true; |
0200214b | 898 | break; |
052b6a6c | 899 | case PT_LOAD: |
052b6a6c UD |
900 | { |
901 | ElfW(Addr) mapstart; | |
2373b30e UD |
902 | ElfW(Addr) allocend; |
903 | ||
904 | /* Remember where the main program starts in memory. */ | |
d6b5d570 UD |
905 | mapstart = (GL(dl_loaded)->l_addr |
906 | + (ph->p_vaddr & ~(ph->p_align - 1))); | |
907 | if (GL(dl_loaded)->l_map_start > mapstart) | |
908 | GL(dl_loaded)->l_map_start = mapstart; | |
2373b30e UD |
909 | |
910 | /* Also where it ends. */ | |
d6b5d570 UD |
911 | allocend = GL(dl_loaded)->l_addr + ph->p_vaddr + ph->p_memsz; |
912 | if (GL(dl_loaded)->l_map_end < allocend) | |
913 | GL(dl_loaded)->l_map_end = allocend; | |
052b6a6c UD |
914 | } |
915 | break; | |
a2f1f5cb UD |
916 | #ifdef USE_TLS |
917 | case PT_TLS: | |
aed283dd UD |
918 | if (ph->p_memsz > 0) |
919 | { | |
920 | /* Note that in the case the dynamic linker we duplicate work | |
921 | here since we read the PT_TLS entry already in | |
922 | _dl_start_final. But the result is repeatable so do not | |
923 | check for this special but unimportant case. */ | |
924 | GL(dl_loaded)->l_tls_blocksize = ph->p_memsz; | |
925 | GL(dl_loaded)->l_tls_align = ph->p_align; | |
99fe3b0e UD |
926 | if (ph->p_align == 0) |
927 | GL(dl_loaded)->l_tls_firstbyte_offset = 0; | |
928 | else | |
929 | GL(dl_loaded)->l_tls_firstbyte_offset = (ph->p_vaddr | |
930 | & (ph->p_align - 1)); | |
aed283dd UD |
931 | GL(dl_loaded)->l_tls_initimage_size = ph->p_filesz; |
932 | GL(dl_loaded)->l_tls_initimage = (void *) ph->p_vaddr; | |
933 | ||
934 | /* This image gets the ID one. */ | |
935 | GL(dl_tls_max_dtv_idx) = GL(dl_loaded)->l_tls_modid = 1; | |
936 | } | |
a2f1f5cb UD |
937 | break; |
938 | #endif | |
ecdeaac0 RM |
939 | case PT_GNU_STACK: |
940 | GL(dl_stack_flags) = ph->p_flags; | |
941 | break; | |
0200214b | 942 | } |
75aafc71 RM |
943 | #ifdef USE_TLS |
944 | /* Adjust the address of the TLS initialization image in case | |
945 | the executable is actually an ET_DYN object. */ | |
946 | if (GL(dl_loaded)->l_tls_initimage != NULL) | |
947 | GL(dl_loaded)->l_tls_initimage | |
948 | = (char *) GL(dl_loaded)->l_tls_initimage + GL(dl_loaded)->l_addr; | |
949 | #endif | |
d6b5d570 UD |
950 | if (! GL(dl_loaded)->l_map_end) |
951 | GL(dl_loaded)->l_map_end = ~0; | |
952 | if (! GL(dl_rtld_map).l_libname && GL(dl_rtld_map).l_name) | |
c84142e8 UD |
953 | { |
954 | /* We were invoked directly, so the program might not have a | |
955 | PT_INTERP. */ | |
d6b5d570 | 956 | _dl_rtld_libname.name = GL(dl_rtld_map).l_name; |
3fb55878 | 957 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 958 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
c84142e8 | 959 | } |
ffee1316 | 960 | else |
d6b5d570 | 961 | assert (GL(dl_rtld_map).l_libname); /* How else did we get here? */ |
0200214b | 962 | |
9a51759b UD |
963 | if (! rtld_is_main) |
964 | { | |
965 | /* Extract the contents of the dynamic section for easy access. */ | |
479aa8ec | 966 | elf_get_dynamic_info (GL(dl_loaded), NULL); |
d6b5d570 | 967 | if (GL(dl_loaded)->l_info[DT_HASH]) |
9a51759b | 968 | /* Set up our cache of pointers into the hash table. */ |
d6b5d570 | 969 | _dl_setup_hash (GL(dl_loaded)); |
9a51759b | 970 | } |
0200214b | 971 | |
9a821cf9 | 972 | if (__builtin_expect (mode, normal) == verify) |
e2102c14 UD |
973 | { |
974 | /* We were called just to verify that this is a dynamic | |
975 | executable using us as the program interpreter. Exit with an | |
976 | error if we were not able to load the binary or no interpreter | |
977 | is specified (i.e., this is no dynamically linked binary. */ | |
d6b5d570 | 978 | if (GL(dl_loaded)->l_ld == NULL) |
e2102c14 | 979 | _exit (1); |
e2102c14 UD |
980 | |
981 | /* We allow here some platform specific code. */ | |
982 | #ifdef DISTINGUISH_LIB_VERSIONS | |
983 | DISTINGUISH_LIB_VERSIONS; | |
984 | #endif | |
eb406346 | 985 | _exit (has_interp ? 0 : 2); |
e2102c14 UD |
986 | } |
987 | ||
9a51759b | 988 | if (! rtld_is_main) |
97a51d8a UD |
989 | /* Initialize the data structures for the search paths for shared |
990 | objects. */ | |
120b4c49 | 991 | _dl_init_paths (library_path); |
97a51d8a | 992 | |
0200214b | 993 | /* Put the link_map for ourselves on the chain so it can be found by |
ceb2d9aa | 994 | name. Note that at this point the global chain of link maps contains |
d6b5d570 UD |
995 | exactly one element, which is pointed to by dl_loaded. */ |
996 | if (! GL(dl_rtld_map).l_name) | |
ffee1316 RM |
997 | /* If not invoked directly, the dynamic linker shared object file was |
998 | found by the PT_INTERP name. */ | |
d6b5d570 UD |
999 | GL(dl_rtld_map).l_name = (char *) GL(dl_rtld_map).l_libname->name; |
1000 | GL(dl_rtld_map).l_type = lt_library; | |
1001 | GL(dl_loaded)->l_next = &GL(dl_rtld_map); | |
1002 | GL(dl_rtld_map).l_prev = GL(dl_loaded); | |
1003 | ++GL(dl_nloaded); | |
0200214b | 1004 | |
97fd3a30 UD |
1005 | /* If LD_USE_LOAD_BIAS env variable has not been seen, default |
1006 | to not using bias for non-prelinked PIEs and libraries | |
1007 | and using it for executables or prelinked PIEs or libraries. */ | |
1008 | if (GL(dl_use_load_bias) == (ElfW(Addr)) -2) | |
1009 | GL(dl_use_load_bias) = (GL(dl_loaded)->l_addr == 0) ? -1 : 0; | |
1010 | ||
553eca26 UD |
1011 | /* Set up the program header information for the dynamic linker |
1012 | itself. It is needed in the dl_iterate_phdr() callbacks. */ | |
4cfde896 UD |
1013 | ElfW(Ehdr) *rtld_ehdr = (ElfW(Ehdr) *) GL(dl_rtld_map).l_map_start; |
1014 | GL(dl_rtld_map).l_phdr = (ElfW(Phdr) *) (GL(dl_rtld_map).l_map_start | |
553eca26 UD |
1015 | + rtld_ehdr->e_phoff); |
1016 | GL(dl_rtld_map).l_phnum = rtld_ehdr->e_phnum; | |
1017 | ||
14bab8de | 1018 | /* We have two ways to specify objects to preload: via environment |
49c091e5 | 1019 | variable and via the file /etc/ld.so.preload. The latter can also |
14bab8de | 1020 | be used when security is enabled. */ |
2064087b RM |
1021 | preloads = NULL; |
1022 | npreloads = 0; | |
14bab8de | 1023 | |
db33f7d4 | 1024 | if (__builtin_expect (preloadlist != NULL, 0)) |
c4029823 | 1025 | { |
566efee2 UD |
1026 | /* The LD_PRELOAD environment variable gives list of libraries |
1027 | separated by white space or colons that are loaded before the | |
fd26970f UD |
1028 | executable's dependencies and prepended to the global scope |
1029 | list. If the binary is running setuid all elements | |
1030 | containing a '/' are ignored since it is insecure. */ | |
1031 | char *list = strdupa (preloadlist); | |
1032 | char *p; | |
db276fa1 UD |
1033 | |
1034 | HP_TIMING_NOW (start); | |
1035 | ||
9710f75d UD |
1036 | /* Prevent optimizing strsep. Speed is not important here. */ |
1037 | while ((p = (strsep) (&list, " :")) != NULL) | |
e2102c14 | 1038 | if (p[0] != '\0' |
e6caf4e1 | 1039 | && (__builtin_expect (! INTUSE(__libc_enable_secure), 1) |
db33f7d4 | 1040 | || strchr (p, '/') == NULL)) |
fd26970f | 1041 | { |
87837aac UD |
1042 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
1043 | p, 1, | |
1044 | lt_library, | |
cff26a3e | 1045 | 0, 0); |
42c4f32a | 1046 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
1047 | /* It is no duplicate. */ |
1048 | ++npreloads; | |
fd26970f | 1049 | } |
db276fa1 UD |
1050 | |
1051 | HP_TIMING_NOW (stop); | |
1052 | HP_TIMING_DIFF (diff, start, stop); | |
1053 | HP_TIMING_ACCUM_NT (load_time, diff); | |
c4029823 UD |
1054 | } |
1055 | ||
14bab8de UD |
1056 | /* Read the contents of the file. */ |
1057 | file = _dl_sysdep_read_whole_file ("/etc/ld.so.preload", &file_size, | |
1058 | PROT_READ | PROT_WRITE); | |
40b07f5b | 1059 | if (__builtin_expect (file != MAP_FAILED, 0)) |
14bab8de UD |
1060 | { |
1061 | /* Parse the file. It contains names of libraries to be loaded, | |
1062 | separated by white spaces or `:'. It may also contain | |
1063 | comments introduced by `#'. */ | |
1064 | char *problem; | |
1065 | char *runp; | |
1066 | size_t rest; | |
1067 | ||
1068 | /* Eliminate comments. */ | |
1069 | runp = file; | |
1070 | rest = file_size; | |
1071 | while (rest > 0) | |
1072 | { | |
1073 | char *comment = memchr (runp, '#', rest); | |
1074 | if (comment == NULL) | |
1075 | break; | |
1076 | ||
1077 | rest -= comment - runp; | |
1078 | do | |
1079 | *comment = ' '; | |
1080 | while (--rest > 0 && *++comment != '\n'); | |
1081 | } | |
1082 | ||
1083 | /* We have one problematic case: if we have a name at the end of | |
1084 | the file without a trailing terminating characters, we cannot | |
1085 | place the \0. Handle the case separately. */ | |
49891c10 UD |
1086 | if (file[file_size - 1] != ' ' && file[file_size - 1] != '\t' |
1087 | && file[file_size - 1] != '\n' && file[file_size - 1] != ':') | |
14bab8de UD |
1088 | { |
1089 | problem = &file[file_size]; | |
1090 | while (problem > file && problem[-1] != ' ' && problem[-1] != '\t' | |
49891c10 | 1091 | && problem[-1] != '\n' && problem[-1] != ':') |
14bab8de UD |
1092 | --problem; |
1093 | ||
1094 | if (problem > file) | |
1095 | problem[-1] = '\0'; | |
1096 | } | |
1097 | else | |
49891c10 UD |
1098 | { |
1099 | problem = NULL; | |
1100 | file[file_size - 1] = '\0'; | |
1101 | } | |
14bab8de | 1102 | |
db276fa1 UD |
1103 | HP_TIMING_NOW (start); |
1104 | ||
14bab8de UD |
1105 | if (file != problem) |
1106 | { | |
1107 | char *p; | |
e2102c14 | 1108 | runp = file; |
14bab8de | 1109 | while ((p = strsep (&runp, ": \t\n")) != NULL) |
e2102c14 UD |
1110 | if (p[0] != '\0') |
1111 | { | |
cff26a3e AJ |
1112 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
1113 | p, 1, | |
1114 | lt_library, | |
1115 | 0, 0); | |
42c4f32a | 1116 | if (++new_map->l_opencount == 1) |
e2102c14 UD |
1117 | /* It is no duplicate. */ |
1118 | ++npreloads; | |
1119 | } | |
14bab8de UD |
1120 | } |
1121 | ||
1122 | if (problem != NULL) | |
1123 | { | |
1124 | char *p = strndupa (problem, file_size - (problem - file)); | |
87837aac UD |
1125 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), p, |
1126 | 1, lt_library, | |
1127 | 0, 0); | |
42c4f32a | 1128 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
1129 | /* It is no duplicate. */ |
1130 | ++npreloads; | |
14bab8de UD |
1131 | } |
1132 | ||
db276fa1 UD |
1133 | HP_TIMING_NOW (stop); |
1134 | HP_TIMING_DIFF (diff, start, stop); | |
1135 | HP_TIMING_ACCUM_NT (load_time, diff); | |
1136 | ||
14bab8de UD |
1137 | /* We don't need the file anymore. */ |
1138 | __munmap (file, file_size); | |
1139 | } | |
1140 | ||
db33f7d4 | 1141 | if (__builtin_expect (npreloads, 0) != 0) |
14bab8de UD |
1142 | { |
1143 | /* Set up PRELOADS with a vector of the preloaded libraries. */ | |
1144 | struct link_map *l; | |
14bab8de | 1145 | preloads = __alloca (npreloads * sizeof preloads[0]); |
d6b5d570 | 1146 | l = GL(dl_rtld_map).l_next; /* End of the chain before preloads. */ |
14bab8de UD |
1147 | i = 0; |
1148 | do | |
1149 | { | |
1150 | preloads[i++] = l; | |
1151 | l = l->l_next; | |
1152 | } while (l); | |
1153 | assert (i == npreloads); | |
1154 | } | |
1155 | ||
f866314b UD |
1156 | #ifdef NEED_DL_SYSINFO |
1157 | if (GL(dl_sysinfo_dso) != NULL) | |
1158 | { | |
1159 | /* We have a prelinked DSO preloaded by the system. */ | |
1160 | GL(dl_sysinfo) = GL(dl_sysinfo_dso)->e_entry; | |
1161 | ||
1162 | /* Do an abridged version of the work _dl_map_object_from_fd would do | |
1163 | to map in the object. It's already mapped and prelinked (and | |
1164 | better be, since it's read-only and so we couldn't relocate it). | |
1165 | We just want our data structures to describe it as if we had just | |
1166 | mapped and relocated it normally. */ | |
1167 | struct link_map *l = _dl_new_object ((char *) "", "", lt_library, NULL); | |
1168 | if (__builtin_expect (l != NULL, 1)) | |
1169 | { | |
f556dbfa | 1170 | static ElfW(Dyn) dyn_temp[DL_RO_DYN_TEMP_CNT]; |
c776b3d7 UD |
1171 | #ifndef NDEBUG |
1172 | uint_fast16_t pt_load_num = 0; | |
1173 | #endif | |
479aa8ec | 1174 | |
f866314b UD |
1175 | l->l_phdr = ((const void *) GL(dl_sysinfo_dso) |
1176 | + GL(dl_sysinfo_dso)->e_phoff); | |
1177 | l->l_phnum = GL(dl_sysinfo_dso)->e_phnum; | |
1178 | for (uint_fast16_t i = 0; i < l->l_phnum; ++i) | |
1179 | { | |
1180 | const ElfW(Phdr) *const ph = &l->l_phdr[i]; | |
1181 | if (ph->p_type == PT_DYNAMIC) | |
1182 | { | |
1183 | l->l_ld = (void *) ph->p_vaddr; | |
1184 | l->l_ldnum = ph->p_memsz / sizeof (ElfW(Dyn)); | |
1185 | break; | |
1186 | } | |
c776b3d7 | 1187 | #ifndef NDEBUG |
f866314b | 1188 | if (ph->p_type == PT_LOAD) |
c776b3d7 UD |
1189 | { |
1190 | assert (pt_load_num | |
1191 | || (void *) ph->p_vaddr == GL(dl_sysinfo_dso)); | |
1192 | pt_load_num++; | |
1193 | } | |
1194 | #endif | |
f866314b | 1195 | } |
479aa8ec | 1196 | elf_get_dynamic_info (l, dyn_temp); |
f866314b UD |
1197 | _dl_setup_hash (l); |
1198 | l->l_relocated = 1; | |
f28c14d6 | 1199 | l->l_map_start = (ElfW(Addr)) GL(dl_sysinfo_dso); |
f866314b UD |
1200 | |
1201 | /* Now that we have the info handy, use the DSO image's soname | |
b49329d9 RM |
1202 | so this object can be looked up by name. Note that we do not |
1203 | set l_name here. That field gives the file name of the DSO, | |
1204 | and this DSO is not associated with any file. */ | |
f866314b | 1205 | if (l->l_info[DT_SONAME] != NULL) |
f556dbfa UD |
1206 | { |
1207 | /* Work around a kernel problem. The kernel cannot handle | |
1208 | addresses in the vsyscall DSO pages in writev() calls. */ | |
1209 | const char *dsoname = ((char *) D_PTR (l, l_info[DT_STRTAB]) | |
1210 | + l->l_info[DT_SONAME]->d_un.d_val); | |
1211 | size_t len = strlen (dsoname); | |
b49329d9 RM |
1212 | char *copy = malloc (len); |
1213 | if (copy == NULL) | |
f556dbfa | 1214 | _dl_fatal_printf ("out of memory\n"); |
b49329d9 | 1215 | l->l_libname->name = memcpy (copy, dsoname, len); |
f556dbfa | 1216 | } |
f866314b UD |
1217 | } |
1218 | } | |
1219 | #endif | |
1220 | ||
2064087b RM |
1221 | /* Load all the libraries specified by DT_NEEDED entries. If LD_PRELOAD |
1222 | specified some libraries to load, these are inserted before the actual | |
1223 | dependencies in the executable's searchlist for symbol resolution. */ | |
db276fa1 | 1224 | HP_TIMING_NOW (start); |
87837aac UD |
1225 | INTUSE(_dl_map_object_deps) (GL(dl_loaded), preloads, npreloads, |
1226 | mode == trace, 0); | |
db276fa1 UD |
1227 | HP_TIMING_NOW (stop); |
1228 | HP_TIMING_DIFF (diff, start, stop); | |
1229 | HP_TIMING_ACCUM_NT (load_time, diff); | |
e3e35cfc | 1230 | |
42c4f32a UD |
1231 | /* Mark all objects as being in the global scope and set the open |
1232 | counter. */ | |
d6b5d570 | 1233 | for (i = GL(dl_loaded)->l_searchlist.r_nlist; i > 0; ) |
42c4f32a UD |
1234 | { |
1235 | --i; | |
d6b5d570 UD |
1236 | GL(dl_loaded)->l_searchlist.r_list[i]->l_global = 1; |
1237 | ++GL(dl_loaded)->l_searchlist.r_list[i]->l_opencount; | |
42c4f32a | 1238 | } |
d66e34cd | 1239 | |
2064087b | 1240 | #ifndef MAP_ANON |
f332db02 RM |
1241 | /* We are done mapping things, so close the zero-fill descriptor. */ |
1242 | __close (_dl_zerofd); | |
1243 | _dl_zerofd = -1; | |
2064087b | 1244 | #endif |
f332db02 | 1245 | |
f9496a7b | 1246 | /* Remove _dl_rtld_map from the chain. */ |
d6b5d570 UD |
1247 | GL(dl_rtld_map).l_prev->l_next = GL(dl_rtld_map).l_next; |
1248 | if (GL(dl_rtld_map).l_next) | |
1249 | GL(dl_rtld_map).l_next->l_prev = GL(dl_rtld_map).l_prev; | |
f9496a7b | 1250 | |
d6b5d570 | 1251 | if (__builtin_expect (GL(dl_rtld_map).l_opencount > 1, 1)) |
0200214b | 1252 | { |
f9496a7b RM |
1253 | /* Some DT_NEEDED entry referred to the interpreter object itself, so |
1254 | put it back in the list of visible objects. We insert it into the | |
1255 | chain in symbol search order because gdb uses the chain's order as | |
1256 | its symbol search order. */ | |
77aba05b | 1257 | i = 1; |
d6b5d570 | 1258 | while (GL(dl_loaded)->l_searchlist.r_list[i] != &GL(dl_rtld_map)) |
f9496a7b | 1259 | ++i; |
d6b5d570 | 1260 | GL(dl_rtld_map).l_prev = GL(dl_loaded)->l_searchlist.r_list[i - 1]; |
b2bcd61a | 1261 | if (__builtin_expect (mode, normal) == normal) |
d6b5d570 UD |
1262 | GL(dl_rtld_map).l_next = (i + 1 < GL(dl_loaded)->l_searchlist.r_nlist |
1263 | ? GL(dl_loaded)->l_searchlist.r_list[i + 1] | |
1264 | : NULL); | |
b2bcd61a UD |
1265 | else |
1266 | /* In trace mode there might be an invisible object (which we | |
1267 | could not find) after the previous one in the search list. | |
1268 | In this case it doesn't matter much where we put the | |
1269 | interpreter object, so we just initialize the list pointer so | |
1270 | that the assertion below holds. */ | |
d6b5d570 | 1271 | GL(dl_rtld_map).l_next = GL(dl_rtld_map).l_prev->l_next; |
b2bcd61a | 1272 | |
d6b5d570 UD |
1273 | assert (GL(dl_rtld_map).l_prev->l_next == GL(dl_rtld_map).l_next); |
1274 | GL(dl_rtld_map).l_prev->l_next = &GL(dl_rtld_map); | |
3fb55878 | 1275 | if (GL(dl_rtld_map).l_next != NULL) |
f9496a7b | 1276 | { |
d6b5d570 UD |
1277 | assert (GL(dl_rtld_map).l_next->l_prev == GL(dl_rtld_map).l_prev); |
1278 | GL(dl_rtld_map).l_next->l_prev = &GL(dl_rtld_map); | |
f9496a7b | 1279 | } |
0200214b | 1280 | } |
d66e34cd | 1281 | |
c84142e8 UD |
1282 | /* Now let us see whether all libraries are available in the |
1283 | versions we need. */ | |
1284 | { | |
993b3242 UD |
1285 | struct version_check_args args; |
1286 | args.doexit = mode == normal; | |
145b8413 | 1287 | args.dotrace = mode == trace; |
993b3242 | 1288 | _dl_receive_error (print_missing_version, version_check_doit, &args); |
c84142e8 UD |
1289 | } |
1290 | ||
bff334e0 UD |
1291 | #ifdef USE_TLS |
1292 | /* Now it is time to determine the layout of the static TLS block | |
1293 | and allocate it for the initial thread. Note that we always | |
1294 | allocate the static block, we never defer it even if no | |
1295 | DF_STATIC_TLS bit is set. The reason is that we know glibc will | |
1296 | use the static model. First add the dynamic linker to the list | |
1297 | if it also uses TLS. */ | |
1298 | if (GL(dl_rtld_map).l_tls_blocksize != 0) | |
1299 | /* Assign a module ID. */ | |
1300 | GL(dl_rtld_map).l_tls_modid = _dl_next_tls_modid (); | |
1301 | ||
131fd126 UD |
1302 | # ifndef TLS_INIT_TP_EXPENSIVE |
1303 | # define TLS_INIT_TP_EXPENSIVE 0 | |
1304 | # endif | |
1305 | ||
2d148689 RM |
1306 | /* We do not initialize any of the TLS functionality unless any of the |
1307 | initial modules uses TLS. This makes dynamic loading of modules with | |
1308 | TLS impossible, but to support it requires either eagerly doing setup | |
1309 | now or lazily doing it later. Doing it now makes us incompatible with | |
1310 | an old kernel that can't perform TLS_INIT_TP, even if no TLS is ever | |
1311 | used. Trying to do it lazily is too hairy to try when there could be | |
1312 | multiple threads (from a non-TLS-using libpthread). */ | |
bbe35eb5 | 1313 | if (!TLS_INIT_TP_EXPENSIVE || GL(dl_tls_max_dtv_idx) > 0) |
bff334e0 UD |
1314 | { |
1315 | struct link_map *l; | |
1316 | size_t nelem; | |
1317 | struct dtv_slotinfo *slotinfo; | |
1318 | ||
1319 | /* Number of elements in the static TLS block. */ | |
1320 | GL(dl_tls_static_nelem) = GL(dl_tls_max_dtv_idx); | |
1321 | ||
1322 | /* Allocate the array which contains the information about the | |
1323 | dtv slots. We allocate a few entries more than needed to | |
1324 | avoid the need for reallocation. */ | |
1325 | nelem = GL(dl_tls_max_dtv_idx) + 1 + TLS_SLOTINFO_SURPLUS; | |
1326 | ||
1327 | /* Allocate. */ | |
1328 | GL(dl_tls_dtv_slotinfo_list) = (struct dtv_slotinfo_list *) | |
1329 | malloc (sizeof (struct dtv_slotinfo_list) | |
1330 | + nelem * sizeof (struct dtv_slotinfo)); | |
1331 | /* No need to check the return value. If memory allocation failed | |
1332 | the program would have been terminated. */ | |
1333 | ||
1334 | slotinfo = memset (GL(dl_tls_dtv_slotinfo_list)->slotinfo, '\0', | |
1335 | nelem * sizeof (struct dtv_slotinfo)); | |
1336 | GL(dl_tls_dtv_slotinfo_list)->len = nelem; | |
1337 | GL(dl_tls_dtv_slotinfo_list)->next = NULL; | |
1338 | ||
1339 | /* Fill in the information from the loaded modules. */ | |
1340 | for (l = GL(dl_loaded), i = 0; l != NULL; l = l->l_next) | |
1341 | if (l->l_tls_blocksize != 0) | |
1342 | /* This is a module with TLS data. Store the map reference. | |
1343 | The generation counter is zero. */ | |
1344 | slotinfo[++i].map = l; | |
1345 | assert (i == GL(dl_tls_max_dtv_idx)); | |
1346 | ||
216455bc | 1347 | /* Compute the TLS offsets for the various blocks. */ |
bff334e0 UD |
1348 | _dl_determine_tlsoffset (); |
1349 | ||
1350 | /* Construct the static TLS block and the dtv for the initial | |
1351 | thread. For some platforms this will include allocating memory | |
1352 | for the thread descriptor. The memory for the TLS block will | |
1353 | never be freed. It should be allocated accordingly. The dtv | |
1354 | array can be changed if dynamic loading requires it. */ | |
a816b435 | 1355 | tcbp = _dl_allocate_tls_storage (); |
bff334e0 UD |
1356 | if (tcbp == NULL) |
1357 | _dl_fatal_printf ("\ | |
935f95dd | 1358 | cannot allocate TLS data structures for initial thread"); |
08da0621 RM |
1359 | |
1360 | /* Store for detection of the special case by __tls_get_addr | |
1361 | so it knows not to pass this dtv to the normal realloc. */ | |
8784cc18 | 1362 | GL(dl_initial_dtv) = GET_DTV (tcbp); |
bff334e0 UD |
1363 | } |
1364 | #endif | |
1365 | ||
9a821cf9 | 1366 | if (__builtin_expect (mode, normal) != normal) |
0200214b RM |
1367 | { |
1368 | /* We were run just to list the shared libraries. It is | |
1369 | important that we do this before real relocation, because the | |
1370 | functions we call below for output may no longer work properly | |
1371 | after relocation. */ | |
81f3ac4c UD |
1372 | struct link_map *l; |
1373 | ||
1374 | if (GL(dl_debug_mask) & DL_DEBUG_PRELINK) | |
ceb2d9aa | 1375 | { |
81f3ac4c | 1376 | struct r_scope_elem *scope = &GL(dl_loaded)->l_searchlist; |
ceb2d9aa | 1377 | |
81f3ac4c | 1378 | for (i = 0; i < scope->r_nlist; i++) |
32e6df36 | 1379 | { |
81f3ac4c UD |
1380 | l = scope->r_list [i]; |
1381 | if (l->l_faked) | |
32e6df36 | 1382 | { |
81f3ac4c UD |
1383 | _dl_printf ("\t%s => not found\n", l->l_libname->name); |
1384 | continue; | |
1385 | } | |
1386 | if (_dl_name_match_p (GL(dl_trace_prelink), l)) | |
1387 | GL(dl_trace_prelink_map) = l; | |
1388 | _dl_printf ("\t%s => %s (0x%0*Zx, 0x%0*Zx)", | |
1389 | l->l_libname->name[0] ? l->l_libname->name | |
1390 | : rtld_progname ?: "<main program>", | |
1391 | l->l_name[0] ? l->l_name | |
1392 | : rtld_progname ?: "<main program>", | |
d347a4ab UD |
1393 | (int) sizeof l->l_map_start * 2, |
1394 | (size_t) l->l_map_start, | |
1395 | (int) sizeof l->l_addr * 2, | |
1396 | (size_t) l->l_addr); | |
bff334e0 | 1397 | #ifdef USE_TLS |
81f3ac4c UD |
1398 | if (l->l_tls_modid) |
1399 | _dl_printf (" TLS(0x%Zx, 0x%0*Zx)\n", l->l_tls_modid, | |
1400 | (int) sizeof l->l_tls_offset * 2, | |
d347a4ab | 1401 | (size_t) l->l_tls_offset); |
81f3ac4c | 1402 | else |
bff334e0 | 1403 | #endif |
81f3ac4c | 1404 | _dl_printf ("\n"); |
32e6df36 | 1405 | } |
ceb2d9aa | 1406 | } |
81f3ac4c UD |
1407 | else if (! GL(dl_loaded)->l_info[DT_NEEDED]) |
1408 | _dl_printf ("\tstatically linked\n"); | |
1409 | else | |
1410 | { | |
1411 | for (l = GL(dl_loaded)->l_next; l; l = l->l_next) | |
1412 | if (l->l_faked) | |
1413 | /* The library was not found. */ | |
1414 | _dl_printf ("\t%s => not found\n", l->l_libname->name); | |
1415 | else | |
1416 | _dl_printf ("\t%s => %s (0x%0*Zx)\n", l->l_libname->name, | |
1417 | l->l_name, (int) sizeof l->l_map_start * 2, | |
d347a4ab | 1418 | (size_t) l->l_map_start); |
81f3ac4c | 1419 | } |
1a3a58fd | 1420 | |
9a821cf9 | 1421 | if (__builtin_expect (mode, trace) != trace) |
5a47e7f2 | 1422 | for (i = 1; i < (unsigned int) _dl_argc; ++i) |
cddcfecf RM |
1423 | { |
1424 | const ElfW(Sym) *ref = NULL; | |
c0282c06 UD |
1425 | ElfW(Addr) loadbase; |
1426 | lookup_t result; | |
c0282c06 | 1427 | |
e6caf4e1 UD |
1428 | result = INTUSE(_dl_lookup_symbol) (INTUSE(_dl_argv)[i], |
1429 | GL(dl_loaded), | |
cff26a3e AJ |
1430 | &ref, GL(dl_loaded)->l_scope, |
1431 | ELF_RTYPE_CLASS_PLT, 1); | |
c0282c06 UD |
1432 | |
1433 | loadbase = LOOKUP_VALUE_ADDRESS (result); | |
1434 | ||
35fc382a | 1435 | _dl_printf ("%s found at 0x%0*Zd in object at 0x%0*Zd\n", |
e6caf4e1 | 1436 | INTUSE(_dl_argv)[i], |
d347a4ab UD |
1437 | (int) sizeof ref->st_value * 2, |
1438 | (size_t) ref->st_value, | |
1439 | (int) sizeof loadbase * 2, (size_t) loadbase); | |
cddcfecf | 1440 | } |
ce37fa88 | 1441 | else |
fd26970f | 1442 | { |
667b0577 | 1443 | /* If LD_WARN is set warn about undefined symbols. */ |
5688da55 | 1444 | if (GL(dl_lazy) >= 0 && GL(dl_verbose)) |
ce37fa88 UD |
1445 | { |
1446 | /* We have to do symbol dependency testing. */ | |
1447 | struct relocate_args args; | |
1448 | struct link_map *l; | |
993b3242 | 1449 | |
5688da55 | 1450 | args.lazy = GL(dl_lazy); |
fd26970f | 1451 | |
d6b5d570 | 1452 | l = GL(dl_loaded); |
ce37fa88 UD |
1453 | while (l->l_next) |
1454 | l = l->l_next; | |
1455 | do | |
1456 | { | |
d6b5d570 | 1457 | if (l != &GL(dl_rtld_map) && ! l->l_faked) |
ce37fa88 UD |
1458 | { |
1459 | args.l = l; | |
1460 | _dl_receive_error (print_unresolved, relocate_doit, | |
1461 | &args); | |
ce37fa88 UD |
1462 | } |
1463 | l = l->l_prev; | |
1464 | } while (l); | |
32e6df36 | 1465 | |
d6b5d570 UD |
1466 | if ((GL(dl_debug_mask) & DL_DEBUG_PRELINK) |
1467 | && GL(dl_rtld_map).l_opencount > 1) | |
cff26a3e AJ |
1468 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), |
1469 | GL(dl_loaded)->l_scope, 0, 0); | |
ce37fa88 UD |
1470 | } |
1471 | ||
b0982c4a | 1472 | #define VERNEEDTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERNEED)) |
120b4c49 | 1473 | if (version_info) |
fd26970f | 1474 | { |
ce37fa88 UD |
1475 | /* Print more information. This means here, print information |
1476 | about the versions needed. */ | |
1477 | int first = 1; | |
d6b5d570 | 1478 | struct link_map *map = GL(dl_loaded); |
ce37fa88 | 1479 | |
d6b5d570 | 1480 | for (map = GL(dl_loaded); map != NULL; map = map->l_next) |
fd26970f | 1481 | { |
f41c8091 | 1482 | const char *strtab; |
ce37fa88 | 1483 | ElfW(Dyn) *dyn = map->l_info[VERNEEDTAG]; |
f41c8091 UD |
1484 | ElfW(Verneed) *ent; |
1485 | ||
1486 | if (dyn == NULL) | |
1487 | continue; | |
1488 | ||
a42195db | 1489 | strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
f41c8091 | 1490 | ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr); |
ce37fa88 | 1491 | |
f41c8091 | 1492 | if (first) |
ce37fa88 | 1493 | { |
35fc382a | 1494 | _dl_printf ("\n\tVersion information:\n"); |
f41c8091 UD |
1495 | first = 0; |
1496 | } | |
ce37fa88 | 1497 | |
35fc382a | 1498 | _dl_printf ("\t%s:\n", |
e6caf4e1 | 1499 | map->l_name[0] ? map->l_name : rtld_progname); |
f41c8091 UD |
1500 | |
1501 | while (1) | |
1502 | { | |
1503 | ElfW(Vernaux) *aux; | |
1504 | struct link_map *needed; | |
ce37fa88 | 1505 | |
f41c8091 UD |
1506 | needed = find_needed (strtab + ent->vn_file); |
1507 | aux = (ElfW(Vernaux) *) ((char *) ent + ent->vn_aux); | |
ce37fa88 UD |
1508 | |
1509 | while (1) | |
1510 | { | |
f41c8091 UD |
1511 | const char *fname = NULL; |
1512 | ||
f41c8091 | 1513 | if (needed != NULL |
ba9fcb3f UD |
1514 | && match_version (strtab + aux->vna_name, |
1515 | needed)) | |
f41c8091 UD |
1516 | fname = needed->l_name; |
1517 | ||
35fc382a UD |
1518 | _dl_printf ("\t\t%s (%s) %s=> %s\n", |
1519 | strtab + ent->vn_file, | |
1520 | strtab + aux->vna_name, | |
1521 | aux->vna_flags & VER_FLG_WEAK | |
1522 | ? "[WEAK] " : "", | |
1523 | fname ?: "not found"); | |
ce37fa88 | 1524 | |
f41c8091 UD |
1525 | if (aux->vna_next == 0) |
1526 | /* No more symbols. */ | |
ce37fa88 UD |
1527 | break; |
1528 | ||
f41c8091 UD |
1529 | /* Next symbol. */ |
1530 | aux = (ElfW(Vernaux) *) ((char *) aux | |
1531 | + aux->vna_next); | |
ce37fa88 | 1532 | } |
f41c8091 UD |
1533 | |
1534 | if (ent->vn_next == 0) | |
1535 | /* No more dependencies. */ | |
1536 | break; | |
1537 | ||
1538 | /* Next dependency. */ | |
1539 | ent = (ElfW(Verneed) *) ((char *) ent + ent->vn_next); | |
ce37fa88 | 1540 | } |
fd26970f | 1541 | } |
ce37fa88 | 1542 | } |
fd26970f | 1543 | } |
d66e34cd | 1544 | |
0200214b RM |
1545 | _exit (0); |
1546 | } | |
86d2c878 | 1547 | |
d6b5d570 UD |
1548 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)] |
1549 | && ! __builtin_expect (GL(dl_profile) != NULL, 0)) | |
32e6df36 UD |
1550 | { |
1551 | ElfW(Lib) *liblist, *liblistend; | |
1552 | struct link_map **r_list, **r_listend, *l; | |
9710f75d UD |
1553 | const char *strtab = (const void *) D_PTR (GL(dl_loaded), |
1554 | l_info[DT_STRTAB]); | |
32e6df36 | 1555 | |
d6b5d570 | 1556 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL); |
32e6df36 | 1557 | liblist = (ElfW(Lib) *) |
d6b5d570 | 1558 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)]->d_un.d_ptr; |
32e6df36 UD |
1559 | liblistend = (ElfW(Lib) *) |
1560 | ((char *) liblist | |
d6b5d570 UD |
1561 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)]->d_un.d_val); |
1562 | r_list = GL(dl_loaded)->l_searchlist.r_list; | |
1563 | r_listend = r_list + GL(dl_loaded)->l_searchlist.r_nlist; | |
32e6df36 UD |
1564 | |
1565 | for (; r_list < r_listend && liblist < liblistend; r_list++) | |
1566 | { | |
1567 | l = *r_list; | |
1568 | ||
d6b5d570 | 1569 | if (l == GL(dl_loaded)) |
32e6df36 UD |
1570 | continue; |
1571 | ||
1572 | /* If the library is not mapped where it should, fail. */ | |
1573 | if (l->l_addr) | |
1574 | break; | |
1575 | ||
1576 | /* Next, check if checksum matches. */ | |
1577 | if (l->l_info [VALIDX(DT_CHECKSUM)] == NULL | |
1578 | || l->l_info [VALIDX(DT_CHECKSUM)]->d_un.d_val | |
1579 | != liblist->l_checksum) | |
1580 | break; | |
1581 | ||
1582 | if (l->l_info [VALIDX(DT_GNU_PRELINKED)] == NULL | |
1583 | || l->l_info [VALIDX(DT_GNU_PRELINKED)]->d_un.d_val | |
1584 | != liblist->l_time_stamp) | |
1585 | break; | |
1586 | ||
1587 | if (! _dl_name_match_p (strtab + liblist->l_name, l)) | |
1588 | break; | |
1589 | ||
1590 | ++liblist; | |
1591 | } | |
1592 | ||
1593 | ||
1594 | if (r_list == r_listend && liblist == liblistend) | |
164a7164 | 1595 | prelinked = true; |
32e6df36 | 1596 | |
d6b5d570 | 1597 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_LIBS, 0)) |
32e6df36 UD |
1598 | _dl_printf ("\nprelink checking: %s\n", prelinked ? "ok" : "failed"); |
1599 | } | |
1600 | ||
1601 | if (prelinked) | |
1602 | { | |
d89ae1d5 RM |
1603 | struct link_map *l; |
1604 | ||
d6b5d570 | 1605 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)] != NULL) |
32e6df36 UD |
1606 | { |
1607 | ElfW(Rela) *conflict, *conflictend; | |
1608 | #ifndef HP_TIMING_NONAVAIL | |
1609 | hp_timing_t start; | |
1610 | hp_timing_t stop; | |
1611 | #endif | |
1612 | ||
1613 | HP_TIMING_NOW (start); | |
d6b5d570 | 1614 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)] != NULL); |
32e6df36 | 1615 | conflict = (ElfW(Rela) *) |
d89ae1d5 | 1616 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)]->d_un.d_ptr; |
32e6df36 | 1617 | conflictend = (ElfW(Rela) *) |
d89ae1d5 RM |
1618 | ((char *) conflict |
1619 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)]->d_un.d_val); | |
d6b5d570 | 1620 | _dl_resolve_conflicts (GL(dl_loaded), conflict, conflictend); |
32e6df36 UD |
1621 | HP_TIMING_NOW (stop); |
1622 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1623 | } | |
1624 | ||
d89ae1d5 RM |
1625 | |
1626 | /* Mark all the objects so we know they have been already relocated. */ | |
1627 | for (l = GL(dl_loaded); l != NULL; l = l->l_next) | |
1628 | l->l_relocated = 1; | |
1629 | ||
32e6df36 UD |
1630 | _dl_sysdep_start_cleanup (); |
1631 | } | |
1632 | else | |
164a7164 UD |
1633 | { |
1634 | /* Now we have all the objects loaded. Relocate them all except for | |
1635 | the dynamic linker itself. We do this in reverse order so that copy | |
1636 | relocs of earlier objects overwrite the data written by later | |
1637 | objects. We do not re-relocate the dynamic linker itself in this | |
1638 | loop because that could result in the GOT entries for functions we | |
1639 | call being changed, and that would break us. It is safe to relocate | |
1640 | the dynamic linker out of order because it has no copy relocs (we | |
1641 | know that because it is self-contained). */ | |
1642 | ||
1643 | struct link_map *l; | |
1644 | int consider_profiling = GL(dl_profile) != NULL; | |
8b07d6a8 | 1645 | #ifndef HP_TIMING_NONAVAIL |
164a7164 UD |
1646 | hp_timing_t start; |
1647 | hp_timing_t stop; | |
1648 | hp_timing_t add; | |
8b07d6a8 | 1649 | #endif |
c0fb8a56 | 1650 | |
164a7164 UD |
1651 | /* If we are profiling we also must do lazy reloaction. */ |
1652 | GL(dl_lazy) |= consider_profiling; | |
c0fb8a56 | 1653 | |
164a7164 UD |
1654 | l = GL(dl_loaded); |
1655 | while (l->l_next) | |
1656 | l = l->l_next; | |
db276fa1 | 1657 | |
164a7164 UD |
1658 | HP_TIMING_NOW (start); |
1659 | do | |
1660 | { | |
1661 | /* While we are at it, help the memory handling a bit. We have to | |
1662 | mark some data structures as allocated with the fake malloc() | |
1663 | implementation in ld.so. */ | |
1664 | struct libname_list *lnp = l->l_libname->next; | |
752a2a50 | 1665 | |
164a7164 UD |
1666 | while (__builtin_expect (lnp != NULL, 0)) |
1667 | { | |
1668 | lnp->dont_free = 1; | |
1669 | lnp = lnp->next; | |
1670 | } | |
752a2a50 | 1671 | |
164a7164 | 1672 | if (l != &GL(dl_rtld_map)) |
cff26a3e AJ |
1673 | INTUSE(_dl_relocate_object) (l, l->l_scope, GL(dl_lazy), |
1674 | consider_profiling); | |
be935610 | 1675 | |
164a7164 UD |
1676 | l = l->l_prev; |
1677 | } | |
1678 | while (l); | |
1679 | HP_TIMING_NOW (stop); | |
1680 | ||
1681 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1682 | ||
1683 | /* Do any necessary cleanups for the startup OS interface code. | |
1684 | We do these now so that no calls are made after rtld re-relocation | |
1685 | which might be resolved to different functions than we expect. | |
1686 | We cannot do this before relocating the other objects because | |
1687 | _dl_relocate_object might need to call `mprotect' for DT_TEXTREL. */ | |
1688 | _dl_sysdep_start_cleanup (); | |
1689 | ||
1690 | /* Now enable profiling if needed. Like the previous call, | |
1691 | this has to go here because the calls it makes should use the | |
1692 | rtld versions of the functions (particularly calloc()), but it | |
1693 | needs to have _dl_profile_map set up by the relocator. */ | |
1694 | if (__builtin_expect (GL(dl_profile_map) != NULL, 0)) | |
1695 | /* We must prepare the profiling. */ | |
cff26a3e | 1696 | INTUSE(_dl_start_profile) (GL(dl_profile_map), GL(dl_profile_output)); |
164a7164 UD |
1697 | |
1698 | if (GL(dl_rtld_map).l_opencount > 1) | |
1699 | { | |
1700 | /* There was an explicit ref to the dynamic linker as a shared lib. | |
1701 | Re-relocate ourselves with user-controlled symbol definitions. */ | |
1702 | HP_TIMING_NOW (start); | |
cff26a3e AJ |
1703 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), GL(dl_loaded)->l_scope, |
1704 | 0, 0); | |
164a7164 UD |
1705 | HP_TIMING_NOW (stop); |
1706 | HP_TIMING_DIFF (add, start, stop); | |
1707 | HP_TIMING_ACCUM_NT (relocate_time, add); | |
1708 | } | |
1709 | } | |
ac16e905 | 1710 | |
be935610 | 1711 | /* Now set up the variable which helps the assembler startup code. */ |
d6b5d570 UD |
1712 | GL(dl_main_searchlist) = &GL(dl_loaded)->l_searchlist; |
1713 | GL(dl_global_scope)[0] = &GL(dl_loaded)->l_searchlist; | |
be935610 | 1714 | |
32e6df36 | 1715 | /* Save the information about the original global scope list since |
604510f7 | 1716 | we need it in the memory handling later. */ |
d6b5d570 | 1717 | GL(dl_initial_searchlist) = *GL(dl_main_searchlist); |
604510f7 | 1718 | |
131fd126 UD |
1719 | #ifndef NONTLS_INIT_TP |
1720 | # define NONTLS_INIT_TP do { } while (0) | |
1721 | #endif | |
1722 | ||
a816b435 | 1723 | #ifdef USE_TLS |
131fd126 | 1724 | if (GL(dl_tls_max_dtv_idx) > 0 || USE___THREAD || !TLS_INIT_TP_EXPENSIVE) |
a816b435 RM |
1725 | { |
1726 | /* Now that we have completed relocation, the initializer data | |
1727 | for the TLS blocks has its final values and we can copy them | |
1728 | into the main thread's TLS area, which we allocated above. */ | |
1729 | _dl_allocate_tls_init (tcbp); | |
1730 | ||
ce460d04 RM |
1731 | /* And finally install it for the main thread. If ld.so itself uses |
1732 | TLS we know the thread pointer was initialized earlier. */ | |
fde89ad0 RM |
1733 | const char *lossage = TLS_INIT_TP (tcbp, USE___THREAD); |
1734 | if (__builtin_expect (lossage != NULL, 0)) | |
1735 | _dl_fatal_printf ("cannot set up thread-local storage: %s\n", lossage); | |
a816b435 | 1736 | } |
131fd126 | 1737 | else |
a816b435 | 1738 | #endif |
131fd126 | 1739 | NONTLS_INIT_TP; |
a816b435 | 1740 | |
4d6acc61 RM |
1741 | { |
1742 | /* Initialize _r_debug. */ | |
d6b5d570 | 1743 | struct r_debug *r = _dl_debug_initialize (GL(dl_rtld_map).l_addr); |
ceb2d9aa | 1744 | struct link_map *l; |
4d6acc61 | 1745 | |
d6b5d570 | 1746 | l = GL(dl_loaded); |
ec42724d RM |
1747 | |
1748 | #ifdef ELF_MACHINE_DEBUG_SETUP | |
1749 | ||
1750 | /* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */ | |
1751 | ||
1752 | ELF_MACHINE_DEBUG_SETUP (l, r); | |
d6b5d570 | 1753 | ELF_MACHINE_DEBUG_SETUP (&GL(dl_rtld_map), r); |
ec42724d RM |
1754 | |
1755 | #else | |
1756 | ||
3fb55878 | 1757 | if (l->l_info[DT_DEBUG] != NULL) |
4d6acc61 RM |
1758 | /* There is a DT_DEBUG entry in the dynamic section. Fill it in |
1759 | with the run-time address of the r_debug structure */ | |
1760 | l->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1761 | ||
d746b89c RM |
1762 | /* Fill in the pointer in the dynamic linker's own dynamic section, in |
1763 | case you run gdb on the dynamic linker directly. */ | |
3fb55878 | 1764 | if (GL(dl_rtld_map).l_info[DT_DEBUG] != NULL) |
d6b5d570 | 1765 | GL(dl_rtld_map).l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; |
d746b89c | 1766 | |
ec42724d RM |
1767 | #endif |
1768 | ||
4d6acc61 RM |
1769 | /* Notify the debugger that all objects are now mapped in. */ |
1770 | r->r_state = RT_ADD; | |
cff26a3e | 1771 | INTUSE(_dl_debug_state) (); |
4d6acc61 | 1772 | } |
0200214b | 1773 | |
08cac4ac UD |
1774 | #ifndef MAP_COPY |
1775 | /* We must munmap() the cache file. */ | |
cff26a3e | 1776 | INTUSE(_dl_unload_cache) (); |
08cac4ac UD |
1777 | #endif |
1778 | ||
d66e34cd RM |
1779 | /* Once we return, _dl_sysdep_start will invoke |
1780 | the DT_INIT functions and then *USER_ENTRY. */ | |
1781 | } | |
fd26970f UD |
1782 | \f |
1783 | /* This is a little helper function for resolving symbols while | |
1784 | tracing the binary. */ | |
1785 | static void | |
c84142e8 UD |
1786 | print_unresolved (int errcode __attribute__ ((unused)), const char *objname, |
1787 | const char *errstring) | |
fd26970f | 1788 | { |
3996f34b | 1789 | if (objname[0] == '\0') |
e6caf4e1 | 1790 | objname = rtld_progname ?: "<main program>"; |
35fc382a | 1791 | _dl_error_printf ("%s (%s)\n", errstring, objname); |
fd26970f | 1792 | } |
c84142e8 UD |
1793 | \f |
1794 | /* This is a little helper function for resolving symbols while | |
1795 | tracing the binary. */ | |
1796 | static void | |
1797 | print_missing_version (int errcode __attribute__ ((unused)), | |
1798 | const char *objname, const char *errstring) | |
1799 | { | |
e6caf4e1 | 1800 | _dl_error_printf ("%s: %s: %s\n", rtld_progname ?: "<program name unknown>", |
35fc382a | 1801 | objname, errstring); |
c84142e8 | 1802 | } |
ea278354 | 1803 | \f |
7dea968e UD |
1804 | /* Nonzero if any of the debugging options is enabled. */ |
1805 | static int any_debug; | |
1806 | ||
b5efde2f UD |
1807 | /* Process the string given as the parameter which explains which debugging |
1808 | options are enabled. */ | |
1809 | static void | |
14c44e2e | 1810 | process_dl_debug (const char *dl_debug) |
b5efde2f | 1811 | { |
3e2040c8 UD |
1812 | /* When adding new entries make sure that the maximal length of a name |
1813 | is correctly handled in the LD_DEBUG_HELP code below. */ | |
1814 | static const struct | |
1815 | { | |
379d4ec4 UD |
1816 | unsigned char len; |
1817 | const char name[10]; | |
3e2040c8 UD |
1818 | const char helptext[41]; |
1819 | unsigned short int mask; | |
1820 | } debopts[] = | |
1821 | { | |
379d4ec4 UD |
1822 | #define LEN_AND_STR(str) sizeof (str) - 1, str |
1823 | { LEN_AND_STR ("libs"), "display library search paths", | |
3e2040c8 | 1824 | DL_DEBUG_LIBS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1825 | { LEN_AND_STR ("reloc"), "display relocation processing", |
3e2040c8 | 1826 | DL_DEBUG_RELOC | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1827 | { LEN_AND_STR ("files"), "display progress for input file", |
3e2040c8 | 1828 | DL_DEBUG_FILES | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1829 | { LEN_AND_STR ("symbols"), "display symbol table processing", |
3e2040c8 | 1830 | DL_DEBUG_SYMBOLS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1831 | { LEN_AND_STR ("bindings"), "display information about symbol binding", |
3e2040c8 | 1832 | DL_DEBUG_BINDINGS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1833 | { LEN_AND_STR ("versions"), "display version dependencies", |
3e2040c8 | 1834 | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1835 | { LEN_AND_STR ("all"), "all previous options combined", |
3e2040c8 UD |
1836 | DL_DEBUG_LIBS | DL_DEBUG_RELOC | DL_DEBUG_FILES | DL_DEBUG_SYMBOLS |
1837 | | DL_DEBUG_BINDINGS | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, | |
379d4ec4 | 1838 | { LEN_AND_STR ("statistics"), "display relocation statistics", |
3e2040c8 | 1839 | DL_DEBUG_STATISTICS }, |
379d4ec4 | 1840 | { LEN_AND_STR ("help"), "display this help message and exit", |
3e2040c8 UD |
1841 | DL_DEBUG_HELP }, |
1842 | }; | |
1843 | #define ndebopts (sizeof (debopts) / sizeof (debopts[0])) | |
3e2040c8 | 1844 | |
379d4ec4 UD |
1845 | /* Skip separating white spaces and commas. */ |
1846 | while (*dl_debug != '\0') | |
b5efde2f | 1847 | { |
379d4ec4 | 1848 | if (*dl_debug != ' ' && *dl_debug != ',' && *dl_debug != ':') |
b5efde2f | 1849 | { |
3e2040c8 | 1850 | size_t cnt; |
379d4ec4 | 1851 | size_t len = 1; |
77aba05b | 1852 | |
379d4ec4 UD |
1853 | while (dl_debug[len] != '\0' && dl_debug[len] != ' ' |
1854 | && dl_debug[len] != ',' && dl_debug[len] != ':') | |
1855 | ++len; | |
14c44e2e | 1856 | |
3e2040c8 | 1857 | for (cnt = 0; cnt < ndebopts; ++cnt) |
379d4ec4 UD |
1858 | if (debopts[cnt].len == len |
1859 | && memcmp (dl_debug, debopts[cnt].name, len) == 0) | |
3e2040c8 | 1860 | { |
d6b5d570 | 1861 | GL(dl_debug_mask) |= debopts[cnt].mask; |
5688da55 | 1862 | any_debug = 1; |
3e2040c8 UD |
1863 | break; |
1864 | } | |
77aba05b | 1865 | |
3e2040c8 UD |
1866 | if (cnt == ndebopts) |
1867 | { | |
1868 | /* Display a warning and skip everything until next | |
1869 | separator. */ | |
1870 | char *copy = strndupa (dl_debug, len); | |
1871 | _dl_error_printf ("\ | |
1872 | warning: debug option `%s' unknown; try LD_DEBUG=help\n", copy); | |
379d4ec4 UD |
1873 | } |
1874 | ||
1875 | dl_debug += len; | |
1876 | continue; | |
3e2040c8 | 1877 | } |
379d4ec4 UD |
1878 | |
1879 | ++dl_debug; | |
3e2040c8 | 1880 | } |
77aba05b | 1881 | |
d6b5d570 | 1882 | if (GL(dl_debug_mask) & DL_DEBUG_HELP) |
3e2040c8 UD |
1883 | { |
1884 | size_t cnt; | |
14c44e2e | 1885 | |
3e2040c8 UD |
1886 | _dl_printf ("\ |
1887 | Valid options for the LD_DEBUG environment variable are:\n\n"); | |
db276fa1 | 1888 | |
3e2040c8 | 1889 | for (cnt = 0; cnt < ndebopts; ++cnt) |
37d8b778 UD |
1890 | _dl_printf (" %.*s%s%s\n", debopts[cnt].len, debopts[cnt].name, |
1891 | " " + debopts[cnt].len - 3, | |
3e2040c8 | 1892 | debopts[cnt].helptext); |
14c44e2e | 1893 | |
3e2040c8 UD |
1894 | _dl_printf ("\n\ |
1895 | To direct the debugging output into a file instead of standard output\n\ | |
1896 | a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n"); | |
1897 | _exit (0); | |
b5efde2f | 1898 | } |
b5efde2f UD |
1899 | } |
1900 | \f | |
ea278354 UD |
1901 | /* Process all environments variables the dynamic linker must recognize. |
1902 | Since all of them start with `LD_' we are a bit smarter while finding | |
1903 | all the entries. */ | |
9360906d | 1904 | extern char **_environ attribute_hidden; |
67c94753 | 1905 | |
d6b5d570 | 1906 | |
ea278354 | 1907 | static void |
ba9fcb3f | 1908 | process_envvars (enum mode *modep) |
ea278354 | 1909 | { |
67c94753 | 1910 | char **runp = _environ; |
ea278354 UD |
1911 | char *envline; |
1912 | enum mode mode = normal; | |
7dea968e | 1913 | char *debug_output = NULL; |
ea278354 UD |
1914 | |
1915 | /* This is the default place for profiling data file. */ | |
e6caf4e1 UD |
1916 | GL(dl_profile_output) |
1917 | = &"/var/tmp\0/var/profile"[INTUSE(__libc_enable_secure) ? 9 : 0]; | |
ea278354 UD |
1918 | |
1919 | while ((envline = _dl_next_ld_env_entry (&runp)) != NULL) | |
1920 | { | |
379d4ec4 UD |
1921 | size_t len = 0; |
1922 | ||
1923 | while (envline[len] != '\0' && envline[len] != '=') | |
1924 | ++len; | |
ea278354 | 1925 | |
75e8d1f5 UD |
1926 | if (envline[len] != '=') |
1927 | /* This is a "LD_" variable at the end of the string without | |
1928 | a '=' character. Ignore it since otherwise we will access | |
1929 | invalid memory below. */ | |
67c94753 | 1930 | continue; |
75e8d1f5 | 1931 | |
67c94753 | 1932 | switch (len) |
ea278354 | 1933 | { |
14c44e2e UD |
1934 | case 4: |
1935 | /* Warning level, verbose or not. */ | |
67c94753 | 1936 | if (memcmp (envline, "WARN", 4) == 0) |
d6b5d570 | 1937 | GL(dl_verbose) = envline[5] != '\0'; |
14c44e2e | 1938 | break; |
ea278354 | 1939 | |
14c44e2e UD |
1940 | case 5: |
1941 | /* Debugging of the dynamic linker? */ | |
67c94753 UD |
1942 | if (memcmp (envline, "DEBUG", 5) == 0) |
1943 | process_dl_debug (&envline[6]); | |
14c44e2e | 1944 | break; |
b5efde2f | 1945 | |
14c44e2e UD |
1946 | case 7: |
1947 | /* Print information about versions. */ | |
67c94753 | 1948 | if (memcmp (envline, "VERBOSE", 7) == 0) |
14c44e2e | 1949 | { |
67c94753 | 1950 | version_info = envline[8] != '\0'; |
14c44e2e UD |
1951 | break; |
1952 | } | |
7dea968e | 1953 | |
14c44e2e | 1954 | /* List of objects to be preloaded. */ |
67c94753 | 1955 | if (memcmp (envline, "PRELOAD", 7) == 0) |
14c44e2e | 1956 | { |
67c94753 | 1957 | preloadlist = &envline[8]; |
14c44e2e UD |
1958 | break; |
1959 | } | |
120b4c49 | 1960 | |
14c44e2e | 1961 | /* Which shared object shall be profiled. */ |
c95f3fd4 | 1962 | if (memcmp (envline, "PROFILE", 7) == 0 && envline[8] != '\0') |
d6b5d570 | 1963 | GL(dl_profile) = &envline[8]; |
14c44e2e | 1964 | break; |
120b4c49 | 1965 | |
14c44e2e UD |
1966 | case 8: |
1967 | /* Do we bind early? */ | |
67c94753 | 1968 | if (memcmp (envline, "BIND_NOW", 8) == 0) |
f53c03c2 | 1969 | { |
5688da55 | 1970 | GL(dl_lazy) = envline[9] == '\0'; |
f53c03c2 UD |
1971 | break; |
1972 | } | |
67c94753 | 1973 | if (memcmp (envline, "BIND_NOT", 8) == 0) |
d6b5d570 | 1974 | GL(dl_bind_not) = envline[9] != '\0'; |
14c44e2e | 1975 | break; |
ea278354 | 1976 | |
14c44e2e UD |
1977 | case 9: |
1978 | /* Test whether we want to see the content of the auxiliary | |
1979 | array passed up from the kernel. */ | |
67c94753 | 1980 | if (memcmp (envline, "SHOW_AUXV", 9) == 0) |
14c44e2e UD |
1981 | _dl_show_auxv (); |
1982 | break; | |
ea278354 | 1983 | |
12264bd7 | 1984 | case 10: |
3081378b | 1985 | /* Mask for the important hardware capabilities. */ |
67c94753 | 1986 | if (memcmp (envline, "HWCAP_MASK", 10) == 0) |
d6b5d570 | 1987 | GL(dl_hwcap_mask) = __strtoul_internal (&envline[11], NULL, 0, 0); |
12264bd7 UD |
1988 | break; |
1989 | ||
f787edde UD |
1990 | case 11: |
1991 | /* Path where the binary is found. */ | |
e6caf4e1 | 1992 | if (!INTUSE(__libc_enable_secure) |
67c94753 | 1993 | && memcmp (envline, "ORIGIN_PATH", 11) == 0) |
d6b5d570 | 1994 | GL(dl_origin_path) = &envline[12]; |
f787edde UD |
1995 | break; |
1996 | ||
14c44e2e | 1997 | case 12: |
dec126b4 | 1998 | /* The library search path. */ |
67c94753 | 1999 | if (memcmp (envline, "LIBRARY_PATH", 12) == 0) |
dec126b4 | 2000 | { |
67c94753 | 2001 | library_path = &envline[13]; |
dec126b4 UD |
2002 | break; |
2003 | } | |
2004 | ||
14c44e2e | 2005 | /* Where to place the profiling data file. */ |
67c94753 | 2006 | if (memcmp (envline, "DEBUG_OUTPUT", 12) == 0) |
14c44e2e | 2007 | { |
67c94753 | 2008 | debug_output = &envline[13]; |
14c44e2e UD |
2009 | break; |
2010 | } | |
ea278354 | 2011 | |
67c94753 | 2012 | if (memcmp (envline, "DYNAMIC_WEAK", 12) == 0) |
5688da55 | 2013 | GL(dl_dynamic_weak) = 1; |
14c44e2e | 2014 | break; |
ea278354 | 2015 | |
97fd3a30 UD |
2016 | case 13: |
2017 | /* We might have some extra environment variable with length 13 | |
2018 | to handle. */ | |
2019 | #ifdef EXTRA_LD_ENVVARS_13 | |
2020 | EXTRA_LD_ENVVARS_13 | |
2021 | #endif | |
2022 | if (!INTUSE(__libc_enable_secure) | |
2023 | && memcmp (envline, "USE_LOAD_BIAS", 13) == 0) | |
2024 | GL(dl_use_load_bias) = envline[14] == '1' ? -1 : 0; | |
2025 | break; | |
2026 | ||
14c44e2e UD |
2027 | case 14: |
2028 | /* Where to place the profiling data file. */ | |
e6caf4e1 | 2029 | if (!INTUSE(__libc_enable_secure) |
3e2040c8 UD |
2030 | && memcmp (envline, "PROFILE_OUTPUT", 14) == 0 |
2031 | && envline[15] != '\0') | |
d6b5d570 | 2032 | GL(dl_profile_output) = &envline[15]; |
14c44e2e | 2033 | break; |
120b4c49 | 2034 | |
32e6df36 UD |
2035 | case 16: |
2036 | /* The mode of the dynamic linker can be set. */ | |
2037 | if (memcmp (envline, "TRACE_PRELINKING", 16) == 0) | |
2038 | { | |
2039 | mode = trace; | |
d6b5d570 UD |
2040 | GL(dl_verbose) = 1; |
2041 | GL(dl_debug_mask) |= DL_DEBUG_PRELINK; | |
2042 | GL(dl_trace_prelink) = &envline[17]; | |
32e6df36 UD |
2043 | } |
2044 | break; | |
2045 | ||
14c44e2e UD |
2046 | case 20: |
2047 | /* The mode of the dynamic linker can be set. */ | |
67c94753 | 2048 | if (memcmp (envline, "TRACE_LOADED_OBJECTS", 20) == 0) |
14c44e2e UD |
2049 | mode = trace; |
2050 | break; | |
e2102c14 UD |
2051 | |
2052 | /* We might have some extra environment variable to handle. This | |
2053 | is tricky due to the pre-processing of the length of the name | |
2054 | in the switch statement here. The code here assumes that added | |
2055 | environment variables have a different length. */ | |
2056 | #ifdef EXTRA_LD_ENVVARS | |
2057 | EXTRA_LD_ENVVARS | |
2058 | #endif | |
ea278354 UD |
2059 | } |
2060 | } | |
2061 | ||
3e2040c8 UD |
2062 | /* The caller wants this information. */ |
2063 | *modep = mode; | |
2064 | ||
4bae5567 UD |
2065 | /* Extra security for SUID binaries. Remove all dangerous environment |
2066 | variables. */ | |
e6caf4e1 | 2067 | if (__builtin_expect (INTUSE(__libc_enable_secure), 0)) |
4bae5567 | 2068 | { |
c95f3fd4 | 2069 | static const char unsecure_envvars[] = |
4bae5567 UD |
2070 | #ifdef EXTRA_UNSECURE_ENVVARS |
2071 | EXTRA_UNSECURE_ENVVARS | |
2072 | #endif | |
c95f3fd4 UD |
2073 | UNSECURE_ENVVARS; |
2074 | const char *nextp; | |
2075 | ||
2076 | nextp = unsecure_envvars; | |
2077 | do | |
2078 | { | |
2079 | unsetenv (nextp); | |
9710f75d UD |
2080 | /* We could use rawmemchr but this need not be fast. */ |
2081 | nextp = (char *) (strchr) (nextp, '\0') + 1; | |
c95f3fd4 UD |
2082 | } |
2083 | while (*nextp != '\0'); | |
74955460 UD |
2084 | |
2085 | if (__access ("/etc/suid-debug", F_OK) != 0) | |
2086 | unsetenv ("MALLOC_CHECK_"); | |
4bae5567 | 2087 | } |
7dea968e UD |
2088 | /* If we have to run the dynamic linker in debugging mode and the |
2089 | LD_DEBUG_OUTPUT environment variable is given, we write the debug | |
2090 | messages to this file. */ | |
3e2040c8 | 2091 | else if (any_debug && debug_output != NULL) |
7dea968e | 2092 | { |
5f2de337 UD |
2093 | #ifdef O_NOFOLLOW |
2094 | const int flags = O_WRONLY | O_APPEND | O_CREAT | O_NOFOLLOW; | |
2095 | #else | |
2096 | const int flags = O_WRONLY | O_APPEND | O_CREAT; | |
2097 | #endif | |
7a2fd787 UD |
2098 | size_t name_len = strlen (debug_output); |
2099 | char buf[name_len + 12]; | |
2100 | char *startp; | |
2101 | ||
2102 | buf[name_len + 11] = '\0'; | |
9710f75d | 2103 | startp = _itoa (__getpid (), &buf[name_len + 11], 10, 0); |
7a2fd787 UD |
2104 | *--startp = '.'; |
2105 | startp = memcpy (startp - name_len, debug_output, name_len); | |
2106 | ||
5688da55 UD |
2107 | GL(dl_debug_fd) = __open (startp, flags, DEFFILEMODE); |
2108 | if (GL(dl_debug_fd) == -1) | |
7dea968e | 2109 | /* We use standard output if opening the file failed. */ |
5688da55 | 2110 | GL(dl_debug_fd) = STDOUT_FILENO; |
7dea968e | 2111 | } |
ea278354 | 2112 | } |
db276fa1 UD |
2113 | |
2114 | ||
2115 | /* Print the various times we collected. */ | |
2116 | static void | |
2117 | print_statistics (void) | |
2118 | { | |
8b07d6a8 | 2119 | #ifndef HP_TIMING_NONAVAIL |
f457369d | 2120 | char buf[200]; |
db276fa1 UD |
2121 | char *cp; |
2122 | char *wp; | |
2123 | ||
2124 | /* Total time rtld used. */ | |
2125 | if (HP_TIMING_AVAIL) | |
2126 | { | |
2127 | HP_TIMING_PRINT (buf, sizeof (buf), rtld_total_time); | |
cff26a3e AJ |
2128 | INTUSE(_dl_debug_printf) ("\nruntime linker statistics:\n" |
2129 | " total startup time in dynamic loader: %s\n", | |
2130 | buf); | |
db276fa1 UD |
2131 | } |
2132 | ||
2133 | /* Print relocation statistics. */ | |
2134 | if (HP_TIMING_AVAIL) | |
2135 | { | |
35fc382a | 2136 | char pbuf[30]; |
db276fa1 | 2137 | HP_TIMING_PRINT (buf, sizeof (buf), relocate_time); |
9710f75d UD |
2138 | cp = _itoa ((1000ULL * relocate_time) / rtld_total_time, |
2139 | pbuf + sizeof (pbuf), 10, 0); | |
35fc382a UD |
2140 | wp = pbuf; |
2141 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
2142 | { |
2143 | case 3: | |
2144 | *wp++ = *cp++; | |
2145 | case 2: | |
2146 | *wp++ = *cp++; | |
2147 | case 1: | |
2148 | *wp++ = '.'; | |
2149 | *wp++ = *cp++; | |
2150 | } | |
2151 | *wp = '\0'; | |
cff26a3e | 2152 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 2153 | time needed for relocation: %s (%s%%)\n", |
cff26a3e | 2154 | buf, pbuf); |
db276fa1 | 2155 | } |
1531e094 | 2156 | #endif |
a21a20a3 UD |
2157 | |
2158 | unsigned long int num_relative_relocations = 0; | |
2159 | struct r_scope_elem *scope = &GL(dl_loaded)->l_searchlist; | |
2160 | unsigned int i; | |
2161 | ||
2162 | for (i = 0; i < scope->r_nlist; i++) | |
2163 | { | |
2164 | struct link_map *l = scope->r_list [i]; | |
2165 | ||
2166 | if (!l->l_addr) | |
2167 | continue; | |
2168 | ||
2169 | if (l->l_info[VERSYMIDX (DT_RELCOUNT)]) | |
2170 | num_relative_relocations += l->l_info[VERSYMIDX (DT_RELCOUNT)]->d_un.d_val; | |
2171 | if (l->l_info[VERSYMIDX (DT_RELACOUNT)]) | |
2172 | num_relative_relocations += l->l_info[VERSYMIDX (DT_RELACOUNT)]->d_un.d_val; | |
2173 | } | |
2174 | ||
cff26a3e AJ |
2175 | INTUSE(_dl_debug_printf) (" number of relocations: %lu\n", |
2176 | GL(dl_num_relocations)); | |
2177 | INTUSE(_dl_debug_printf) (" number of relocations from cache: %lu\n", | |
2178 | GL(dl_num_cache_relocations)); | |
a21a20a3 UD |
2179 | INTUSE(_dl_debug_printf) (" number of relative relocations: %lu\n", |
2180 | num_relative_relocations); | |
db276fa1 | 2181 | |
1531e094 | 2182 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
2183 | /* Time spend while loading the object and the dependencies. */ |
2184 | if (HP_TIMING_AVAIL) | |
2185 | { | |
35fc382a | 2186 | char pbuf[30]; |
db276fa1 | 2187 | HP_TIMING_PRINT (buf, sizeof (buf), load_time); |
9710f75d UD |
2188 | cp = _itoa ((1000ULL * load_time) / rtld_total_time, |
2189 | pbuf + sizeof (pbuf), 10, 0); | |
35fc382a UD |
2190 | wp = pbuf; |
2191 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
2192 | { |
2193 | case 3: | |
2194 | *wp++ = *cp++; | |
2195 | case 2: | |
2196 | *wp++ = *cp++; | |
2197 | case 1: | |
2198 | *wp++ = '.'; | |
2199 | *wp++ = *cp++; | |
2200 | } | |
2201 | *wp = '\0'; | |
cff26a3e | 2202 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 2203 | time needed to load objects: %s (%s%%)\n", |
cff26a3e | 2204 | buf, pbuf); |
db276fa1 | 2205 | } |
1531e094 | 2206 | #endif |
db276fa1 | 2207 | } |