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d66e34cd | 1 | /* Run time dynamic linker. |
ed20b3d9 | 2 | Copyright (C) 1995-2002, 2003, 2004 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 | 59 | /* Print the various times we collected. */ |
392a6b52 | 60 | static void print_statistics (hp_timing_t *total_timep); |
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 | |
392a6b52 UD |
70 | int _dl_argc attribute_relro attribute_hidden; |
71 | char **_dl_argv attribute_relro; | |
e6caf4e1 | 72 | INTDEF(_dl_argv) |
5c82e15e UD |
73 | |
74 | /* Nonzero if we were run directly. */ | |
392a6b52 | 75 | unsigned int _dl_skip_args attribute_relro 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 | |
392a6b52 | 118 | /* These two variables cannot be moved into .data.rel.ro. */ |
d6b5d570 UD |
119 | static struct libname_list _dl_rtld_libname; |
120 | static struct libname_list _dl_rtld_libname2; | |
86d2c878 | 121 | |
eaad82e0 UD |
122 | /* We expect less than a second for relocation. */ |
123 | #ifdef HP_SMALL_TIMING_AVAIL | |
124 | # undef HP_TIMING_AVAIL | |
125 | # define HP_TIMING_AVAIL HP_SMALL_TIMING_AVAIL | |
126 | #endif | |
127 | ||
db276fa1 | 128 | /* Variable for statistics. */ |
5732c4df | 129 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 | 130 | static hp_timing_t relocate_time; |
392a6b52 UD |
131 | static hp_timing_t load_time attribute_relro; |
132 | static hp_timing_t start_time attribute_relro; | |
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 | ||
ea4f25a7 UD |
256 | /* Initialize the stack end variable. */ |
257 | __libc_stack_end = __builtin_frame_address (0); | |
258 | ||
c2248c44 RM |
259 | /* Call the OS-dependent function to set up life so we can do things like |
260 | file access. It will call `dl_main' (below) to do all the real work | |
261 | of the dynamic linker, and then unwind our frame and run the user | |
262 | entry point on the same stack we entered on. */ | |
ecdeaac0 | 263 | start_addr = _dl_sysdep_start (arg, &dl_main); |
c2248c44 RM |
264 | |
265 | #ifndef HP_TIMING_NONAVAIL | |
392a6b52 | 266 | hp_timing_t rtld_total_time; |
c2248c44 RM |
267 | if (HP_TIMING_AVAIL) |
268 | { | |
269 | hp_timing_t end_time; | |
270 | ||
271 | /* Get the current time. */ | |
272 | HP_TIMING_NOW (end_time); | |
273 | ||
274 | /* Compute the difference. */ | |
275 | HP_TIMING_DIFF (rtld_total_time, start_time, end_time); | |
276 | } | |
277 | #endif | |
278 | ||
279 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_STATISTICS, 0)) | |
392a6b52 | 280 | print_statistics (&rtld_total_time); |
c2248c44 RM |
281 | |
282 | return start_addr; | |
283 | } | |
284 | ||
50746436 | 285 | static ElfW(Addr) __attribute_used__ internal_function |
d66e34cd RM |
286 | _dl_start (void *arg) |
287 | { | |
01d8e36d UD |
288 | #ifdef DONT_USE_BOOTSTRAP_MAP |
289 | # define bootstrap_map GL(dl_rtld_map) | |
290 | #else | |
4874b009 RM |
291 | struct dl_start_final_info info; |
292 | # define bootstrap_map info.l | |
739d440d | 293 | #endif |
d66e34cd | 294 | |
b1dbbaa4 RM |
295 | /* This #define produces dynamic linking inline functions for |
296 | bootstrap relocation instead of general-purpose relocation. */ | |
297 | #define RTLD_BOOTSTRAP | |
c0282c06 UD |
298 | #define RESOLVE_MAP(sym, version, flags) \ |
299 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : &bootstrap_map) | |
50463d27 UD |
300 | #define RESOLVE(sym, version, flags) \ |
301 | ((*(sym))->st_shndx == SHN_UNDEF ? 0 : bootstrap_map.l_addr) | |
b1dbbaa4 RM |
302 | #include "dynamic-link.h" |
303 | ||
db276fa1 | 304 | if (HP_TIMING_INLINE && HP_TIMING_AVAIL) |
4874b009 | 305 | #ifdef DONT_USE_BOOTSTRAP_MAP |
db276fa1 | 306 | HP_TIMING_NOW (start_time); |
4874b009 RM |
307 | #else |
308 | HP_TIMING_NOW (info.start_time); | |
309 | #endif | |
db276fa1 | 310 | |
e66d0a4c UD |
311 | /* Partly clean the `bootstrap_map' structure up. Don't use |
312 | `memset' since it might not be built in or inlined and we cannot | |
313 | make function calls at this point. Use '__builtin_memset' if we | |
01d8e36d UD |
314 | know it is available. We do not have to clear the memory if we |
315 | do not have to use the temporary bootstrap_map. Global variables | |
316 | are initialized to zero by default. */ | |
317 | #ifndef DONT_USE_BOOTSTRAP_MAP | |
318 | # ifdef HAVE_BUILTIN_MEMSET | |
e66d0a4c | 319 | __builtin_memset (bootstrap_map.l_info, '\0', sizeof (bootstrap_map.l_info)); |
01d8e36d | 320 | # else |
ce460d04 | 321 | for (size_t cnt = 0; |
264ec183 UD |
322 | cnt < sizeof (bootstrap_map.l_info) / sizeof (bootstrap_map.l_info[0]); |
323 | ++cnt) | |
324 | bootstrap_map.l_info[cnt] = 0; | |
01d8e36d | 325 | # endif |
e66d0a4c | 326 | #endif |
264ec183 | 327 | |
d66e34cd | 328 | /* Figure out the run-time load address of the dynamic linker itself. */ |
86d2c878 | 329 | bootstrap_map.l_addr = elf_machine_load_address (); |
d66e34cd | 330 | |
47707456 UD |
331 | /* Read our own dynamic section and fill in the info array. */ |
332 | bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic (); | |
479aa8ec | 333 | elf_get_dynamic_info (&bootstrap_map, NULL); |
d66e34cd | 334 | |
299601a1 UD |
335 | #if defined USE_TLS && NO_TLS_OFFSET != 0 |
336 | bootstrap_map.l_tls_offset = NO_TLS_OFFSET; | |
337 | #endif | |
338 | ||
65da9563 RM |
339 | /* Get the dynamic linker's own program header. First we need the ELF |
340 | file header. The `_begin' symbol created by the linker script points | |
341 | to it. When we have something like GOTOFF relocs, we can use a plain | |
342 | reference to find the runtime address. Without that, we have to rely | |
343 | on the `l_addr' value, which is not the value we want when prelinked. */ | |
ed20b3d9 | 344 | #if USE___THREAD |
5f5843e3 | 345 | dtv_t initdtv[3]; |
ed20b3d9 | 346 | #endif /* USE___THREAD */ |
ce460d04 RM |
347 | ElfW(Ehdr) *ehdr |
348 | # ifdef DONT_USE_BOOTSTRAP_MAP | |
349 | = (ElfW(Ehdr) *) &_begin; | |
350 | # else | |
351 | = (ElfW(Ehdr) *) bootstrap_map.l_addr; | |
352 | # endif | |
353 | ElfW(Phdr) *phdr = (ElfW(Phdr) *) ((void *) ehdr + ehdr->e_phoff); | |
354 | size_t cnt = ehdr->e_phnum; /* PT_TLS is usually the last phdr. */ | |
355 | while (cnt-- > 0) | |
ed20b3d9 | 356 | #if USE___THREAD |
739d440d UD |
357 | if (phdr[cnt].p_type == PT_TLS) |
358 | { | |
359 | void *tlsblock; | |
360 | size_t max_align = MAX (TLS_INIT_TCB_ALIGN, phdr[cnt].p_align); | |
f884de5b | 361 | char *p; |
739d440d UD |
362 | |
363 | bootstrap_map.l_tls_blocksize = phdr[cnt].p_memsz; | |
364 | bootstrap_map.l_tls_align = phdr[cnt].p_align; | |
99fe3b0e UD |
365 | if (phdr[cnt].p_align == 0) |
366 | bootstrap_map.l_tls_firstbyte_offset = 0; | |
367 | else | |
368 | bootstrap_map.l_tls_firstbyte_offset = (phdr[cnt].p_vaddr | |
369 | & (phdr[cnt].p_align - 1)); | |
739d440d UD |
370 | assert (bootstrap_map.l_tls_blocksize != 0); |
371 | bootstrap_map.l_tls_initimage_size = phdr[cnt].p_filesz; | |
372 | bootstrap_map.l_tls_initimage = (void *) (bootstrap_map.l_addr | |
a816b435 | 373 | + phdr[cnt].p_vaddr); |
739d440d UD |
374 | |
375 | /* We can now allocate the initial TLS block. This can happen | |
376 | on the stack. We'll get the final memory later when we | |
377 | know all about the various objects loaded at startup | |
378 | time. */ | |
379 | # if TLS_TCB_AT_TP | |
380 | tlsblock = alloca (roundup (bootstrap_map.l_tls_blocksize, | |
381 | TLS_INIT_TCB_ALIGN) | |
382 | + TLS_INIT_TCB_SIZE | |
383 | + max_align); | |
384 | # elif TLS_DTV_AT_TP | |
385 | tlsblock = alloca (roundup (TLS_INIT_TCB_SIZE, | |
386 | bootstrap_map.l_tls_align) | |
387 | + bootstrap_map.l_tls_blocksize | |
388 | + max_align); | |
389 | # else | |
390 | /* In case a model with a different layout for the TCB and DTV | |
391 | is defined add another #elif here and in the following #ifs. */ | |
392 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
393 | # endif | |
394 | /* Align the TLS block. */ | |
395 | tlsblock = (void *) (((uintptr_t) tlsblock + max_align - 1) | |
396 | & ~(max_align - 1)); | |
397 | ||
398 | /* Initialize the dtv. [0] is the length, [1] the generation | |
399 | counter. */ | |
400 | initdtv[0].counter = 1; | |
401 | initdtv[1].counter = 0; | |
402 | ||
403 | /* Initialize the TLS block. */ | |
404 | # if TLS_TCB_AT_TP | |
405 | initdtv[2].pointer = tlsblock; | |
406 | # elif TLS_DTV_AT_TP | |
407 | bootstrap_map.l_tls_offset = roundup (TLS_INIT_TCB_SIZE, | |
408 | bootstrap_map.l_tls_align); | |
409 | initdtv[2].pointer = (char *) tlsblock + bootstrap_map.l_tls_offset; | |
410 | # else | |
411 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
412 | # endif | |
f884de5b UD |
413 | p = __mempcpy (initdtv[2].pointer, bootstrap_map.l_tls_initimage, |
414 | bootstrap_map.l_tls_initimage_size); | |
415 | # ifdef HAVE_BUILTIN_MEMSET | |
416 | __builtin_memset (p, '\0', (bootstrap_map.l_tls_blocksize | |
417 | - bootstrap_map.l_tls_initimage_size)); | |
418 | # else | |
419 | { | |
420 | size_t remaining = (bootstrap_map.l_tls_blocksize | |
421 | - bootstrap_map.l_tls_initimage_size); | |
422 | while (remaining-- > 0) | |
423 | *p++ = '\0'; | |
424 | } | |
425 | #endif | |
739d440d UD |
426 | |
427 | /* Install the pointer to the dtv. */ | |
428 | ||
429 | /* Initialize the thread pointer. */ | |
430 | # if TLS_TCB_AT_TP | |
431 | bootstrap_map.l_tls_offset | |
432 | = roundup (bootstrap_map.l_tls_blocksize, TLS_INIT_TCB_ALIGN); | |
433 | ||
434 | INSTALL_DTV ((char *) tlsblock + bootstrap_map.l_tls_offset, | |
435 | initdtv); | |
436 | ||
fde89ad0 RM |
437 | const char *lossage = TLS_INIT_TP ((char *) tlsblock |
438 | + bootstrap_map.l_tls_offset, 0); | |
739d440d UD |
439 | # elif TLS_DTV_AT_TP |
440 | INSTALL_DTV (tlsblock, initdtv); | |
fde89ad0 | 441 | const char *lossage = TLS_INIT_TP (tlsblock, 0); |
739d440d UD |
442 | # else |
443 | # error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined" | |
444 | # endif | |
fde89ad0 RM |
445 | if (__builtin_expect (lossage != NULL, 0)) |
446 | _dl_fatal_printf ("cannot set up thread-local storage: %s\n", | |
447 | lossage); | |
739d440d UD |
448 | |
449 | /* So far this is module number one. */ | |
450 | bootstrap_map.l_tls_modid = 1; | |
739d440d | 451 | } |
ed20b3d9 | 452 | else |
ce460d04 | 453 | #endif /* USE___THREAD */ |
ed20b3d9 UD |
454 | if (phdr[cnt].p_type == PT_GNU_RELRO) |
455 | { | |
456 | bootstrap_map.l_relro_addr = phdr[cnt].p_vaddr; | |
457 | bootstrap_map.l_relro_size = phdr[cnt].p_memsz; | |
458 | } | |
739d440d | 459 | |
d66e34cd | 460 | #ifdef ELF_MACHINE_BEFORE_RTLD_RELOC |
86d2c878 | 461 | ELF_MACHINE_BEFORE_RTLD_RELOC (bootstrap_map.l_info); |
d66e34cd RM |
462 | #endif |
463 | ||
32e6df36 UD |
464 | if (bootstrap_map.l_addr || ! bootstrap_map.l_info[VALIDX(DT_GNU_PRELINKED)]) |
465 | { | |
466 | /* Relocate ourselves so we can do normal function calls and | |
467 | data access using the global offset table. */ | |
468 | ||
469 | ELF_DYNAMIC_RELOCATE (&bootstrap_map, 0, 0); | |
470 | } | |
421f82e5 | 471 | |
ea7eb7e3 UD |
472 | /* Please note that we don't allow profiling of this object and |
473 | therefore need not test whether we have to allocate the array | |
474 | for the relocation results (as done in dl-reloc.c). */ | |
421f82e5 | 475 | |
d66e34cd RM |
476 | /* Now life is sane; we can call functions and access global data. |
477 | Set up to use the operating system facilities, and find out from | |
478 | the operating system's program loader where to find the program | |
6a1db4ff UD |
479 | header table in core. Put the rest of _dl_start into a separate |
480 | function, that way the compiler cannot put accesses to the GOT | |
481 | before ELF_DYNAMIC_RELOCATE. */ | |
c0282c06 | 482 | { |
01d8e36d UD |
483 | #ifdef DONT_USE_BOOTSTRAP_MAP |
484 | ElfW(Addr) entry = _dl_start_final (arg); | |
485 | #else | |
4874b009 | 486 | ElfW(Addr) entry = _dl_start_final (arg, &info); |
01d8e36d | 487 | #endif |
c0282c06 UD |
488 | |
489 | #ifndef ELF_MACHINE_START_ADDRESS | |
490 | # define ELF_MACHINE_START_ADDRESS(map, start) (start) | |
491 | #endif | |
492 | ||
d6b5d570 | 493 | return ELF_MACHINE_START_ADDRESS (GL(dl_loaded), entry); |
c0282c06 | 494 | } |
6a1db4ff UD |
495 | } |
496 | ||
497 | ||
d66e34cd | 498 | |
d66e34cd RM |
499 | /* Now life is peachy; we can do all normal operations. |
500 | On to the real work. */ | |
501 | ||
993b3242 UD |
502 | /* Some helper functions. */ |
503 | ||
504 | /* Arguments to relocate_doit. */ | |
505 | struct relocate_args | |
506 | { | |
507 | struct link_map *l; | |
508 | int lazy; | |
509 | }; | |
510 | ||
511 | struct map_args | |
512 | { | |
513 | /* Argument to map_doit. */ | |
514 | char *str; | |
515 | /* Return value of map_doit. */ | |
516 | struct link_map *main_map; | |
517 | }; | |
518 | ||
519 | /* Arguments to version_check_doit. */ | |
520 | struct version_check_args | |
521 | { | |
993b3242 | 522 | int doexit; |
145b8413 | 523 | int dotrace; |
993b3242 UD |
524 | }; |
525 | ||
526 | static void | |
527 | relocate_doit (void *a) | |
528 | { | |
529 | struct relocate_args *args = (struct relocate_args *) a; | |
530 | ||
cff26a3e | 531 | INTUSE(_dl_relocate_object) (args->l, args->l->l_scope, args->lazy, 0); |
993b3242 UD |
532 | } |
533 | ||
534 | static void | |
535 | map_doit (void *a) | |
536 | { | |
be935610 | 537 | struct map_args *args = (struct map_args *) a; |
476238ab UD |
538 | args->main_map = INTUSE(_dl_map_object) (NULL, args->str, 0, lt_library, 0, |
539 | __RTLD_OPENEXEC); | |
993b3242 UD |
540 | } |
541 | ||
542 | static void | |
543 | version_check_doit (void *a) | |
544 | { | |
be935610 | 545 | struct version_check_args *args = (struct version_check_args *) a; |
d6b5d570 | 546 | if (_dl_check_all_versions (GL(dl_loaded), 1, args->dotrace) && args->doexit) |
993b3242 UD |
547 | /* We cannot start the application. Abort now. */ |
548 | _exit (1); | |
549 | } | |
550 | ||
ce37fa88 UD |
551 | |
552 | static inline struct link_map * | |
553 | find_needed (const char *name) | |
554 | { | |
d6b5d570 | 555 | unsigned int n = GL(dl_loaded)->l_searchlist.r_nlist; |
ce37fa88 | 556 | |
be935610 | 557 | while (n-- > 0) |
d6b5d570 UD |
558 | if (_dl_name_match_p (name, GL(dl_loaded)->l_searchlist.r_list[n])) |
559 | return GL(dl_loaded)->l_searchlist.r_list[n]; | |
ce37fa88 UD |
560 | |
561 | /* Should never happen. */ | |
562 | return NULL; | |
563 | } | |
564 | ||
565 | static int | |
566 | match_version (const char *string, struct link_map *map) | |
567 | { | |
a42195db | 568 | const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
ce37fa88 UD |
569 | ElfW(Verdef) *def; |
570 | ||
b0982c4a | 571 | #define VERDEFTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERDEF)) |
ce37fa88 UD |
572 | if (map->l_info[VERDEFTAG] == NULL) |
573 | /* The file has no symbol versioning. */ | |
574 | return 0; | |
575 | ||
576 | def = (ElfW(Verdef) *) ((char *) map->l_addr | |
577 | + map->l_info[VERDEFTAG]->d_un.d_ptr); | |
578 | while (1) | |
579 | { | |
580 | ElfW(Verdaux) *aux = (ElfW(Verdaux) *) ((char *) def + def->vd_aux); | |
581 | ||
582 | /* Compare the version strings. */ | |
583 | if (strcmp (string, strtab + aux->vda_name) == 0) | |
584 | /* Bingo! */ | |
585 | return 1; | |
586 | ||
587 | /* If no more definitions we failed to find what we want. */ | |
588 | if (def->vd_next == 0) | |
589 | break; | |
590 | ||
591 | /* Next definition. */ | |
592 | def = (ElfW(Verdef) *) ((char *) def + def->vd_next); | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
bf2cc5fb | 598 | #ifdef _LIBC_REENTRANT |
ce460d04 RM |
599 | /* _dl_error_catch_tsd points to this for the single-threaded case. |
600 | It's reset by the thread library for multithreaded programs. */ | |
216455bc RM |
601 | void ** __attribute__ ((const)) |
602 | _dl_initial_error_catch_tsd (void) | |
ce460d04 RM |
603 | { |
604 | static void *data; | |
605 | return &data; | |
606 | } | |
bf2cc5fb | 607 | #endif |
ce460d04 | 608 | |
334fcf2a UD |
609 | #if defined SHARED && defined _LIBC_REENTRANT \ |
610 | && defined __rtld_lock_default_lock_recursive | |
611 | static void rtld_lock_default_lock_recursive (void *lock) | |
612 | { | |
613 | __rtld_lock_default_lock_recursive (lock); | |
614 | } | |
615 | ||
616 | static void rtld_lock_default_unlock_recursive (void *lock) | |
617 | { | |
618 | __rtld_lock_default_unlock_recursive (lock); | |
619 | } | |
620 | #endif | |
621 | ||
622 | ||
392a6b52 UD |
623 | /* The library search path. */ |
624 | static const char *library_path attribute_relro; | |
625 | /* The list preloaded objects. */ | |
626 | static const char *preloadlist attribute_relro; | |
627 | /* Nonzero if information about versions has to be printed. */ | |
628 | static int version_info attribute_relro; | |
a1a9d215 | 629 | |
d66e34cd | 630 | static void |
266180eb | 631 | dl_main (const ElfW(Phdr) *phdr, |
72f70279 | 632 | ElfW(Word) phnum, |
266180eb | 633 | ElfW(Addr) *user_entry) |
d66e34cd | 634 | { |
266180eb | 635 | const ElfW(Phdr) *ph; |
ea278354 | 636 | enum mode mode; |
2064087b RM |
637 | struct link_map **preloads; |
638 | unsigned int npreloads; | |
14bab8de UD |
639 | size_t file_size; |
640 | char *file; | |
164a7164 | 641 | bool has_interp = false; |
77aba05b | 642 | unsigned int i; |
164a7164 UD |
643 | bool prelinked = false; |
644 | bool rtld_is_main = false; | |
5732c4df | 645 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
646 | hp_timing_t start; |
647 | hp_timing_t stop; | |
648 | hp_timing_t diff; | |
5732c4df | 649 | #endif |
a52d1562 UD |
650 | #ifdef USE_TLS |
651 | void *tcbp; | |
652 | #endif | |
d66e34cd | 653 | |
bf2cc5fb | 654 | #ifdef _LIBC_REENTRANT |
ce460d04 | 655 | /* Explicit initialization since the reloc would just be more work. */ |
216455bc | 656 | GL(dl_error_catch_tsd) = &_dl_initial_error_catch_tsd; |
bf2cc5fb | 657 | #endif |
ce460d04 | 658 | |
adc12574 UD |
659 | #ifdef USE_TLS |
660 | GL(dl_init_static_tls) = &_dl_nothread_init_static_tls; | |
661 | #endif | |
662 | ||
334fcf2a UD |
663 | #if defined SHARED && defined _LIBC_REENTRANT \ |
664 | && defined __rtld_lock_default_lock_recursive | |
665 | GL(dl_rtld_lock_recursive) = rtld_lock_default_lock_recursive; | |
666 | GL(dl_rtld_unlock_recursive) = rtld_lock_default_unlock_recursive; | |
667 | #endif | |
668 | ||
c70ba488 RM |
669 | /* The explicit initialization here is cheaper than processing the reloc |
670 | in the _rtld_local definition's initializer. */ | |
671 | GL(dl_make_stack_executable_hook) = &_dl_make_stack_executable; | |
672 | ||
ea278354 | 673 | /* Process the environment variable which control the behaviour. */ |
ba9fcb3f | 674 | process_envvars (&mode); |
3996f34b | 675 | |
46ec036d | 676 | /* Set up a flag which tells we are just starting. */ |
e6caf4e1 | 677 | INTUSE(_dl_starting_up) = 1; |
46ec036d | 678 | |
a16956f3 | 679 | if (*user_entry == (ElfW(Addr)) ENTRY_POINT) |
0200214b RM |
680 | { |
681 | /* Ho ho. We are not the program interpreter! We are the program | |
682 | itself! This means someone ran ld.so as a command. Well, that | |
683 | might be convenient to do sometimes. We support it by | |
684 | interpreting the args like this: | |
685 | ||
686 | ld.so PROGRAM ARGS... | |
687 | ||
688 | The first argument is the name of a file containing an ELF | |
689 | executable we will load and run with the following arguments. | |
690 | To simplify life here, PROGRAM is searched for using the | |
691 | normal rules for shared objects, rather than $PATH or anything | |
692 | like that. We just load it and use its entry point; we don't | |
693 | pay attention to its PT_INTERP command (we are the interpreter | |
694 | ourselves). This is an easy way to test a new ld.so before | |
695 | installing it. */ | |
164a7164 | 696 | rtld_is_main = true; |
421f82e5 | 697 | |
ffee1316 | 698 | /* Note the place where the dynamic linker actually came from. */ |
e6caf4e1 | 699 | GL(dl_rtld_map).l_name = rtld_progname; |
6a76c115 | 700 | |
fd26970f | 701 | while (_dl_argc > 1) |
e6caf4e1 | 702 | if (! strcmp (INTUSE(_dl_argv)[1], "--list")) |
fd26970f UD |
703 | { |
704 | mode = list; | |
5688da55 | 705 | GL(dl_lazy) = -1; /* This means do no dependency analysis. */ |
61965e9b | 706 | |
fd26970f UD |
707 | ++_dl_skip_args; |
708 | --_dl_argc; | |
e6caf4e1 | 709 | ++INTUSE(_dl_argv); |
fd26970f | 710 | } |
e6caf4e1 | 711 | else if (! strcmp (INTUSE(_dl_argv)[1], "--verify")) |
fd26970f UD |
712 | { |
713 | mode = verify; | |
6a76c115 | 714 | |
fd26970f UD |
715 | ++_dl_skip_args; |
716 | --_dl_argc; | |
e6caf4e1 | 717 | ++INTUSE(_dl_argv); |
fd26970f | 718 | } |
e6caf4e1 UD |
719 | else if (! strcmp (INTUSE(_dl_argv)[1], "--library-path") |
720 | && _dl_argc > 2) | |
880f421f | 721 | { |
e6caf4e1 | 722 | library_path = INTUSE(_dl_argv)[2]; |
880f421f | 723 | |
310930c1 UD |
724 | _dl_skip_args += 2; |
725 | _dl_argc -= 2; | |
e6caf4e1 | 726 | INTUSE(_dl_argv) += 2; |
310930c1 | 727 | } |
e6caf4e1 UD |
728 | else if (! strcmp (INTUSE(_dl_argv)[1], "--inhibit-rpath") |
729 | && _dl_argc > 2) | |
310930c1 | 730 | { |
e6caf4e1 | 731 | GL(dl_inhibit_rpath) = INTUSE(_dl_argv)[2]; |
310930c1 | 732 | |
880f421f UD |
733 | _dl_skip_args += 2; |
734 | _dl_argc -= 2; | |
e6caf4e1 | 735 | INTUSE(_dl_argv) += 2; |
880f421f | 736 | } |
fd26970f UD |
737 | else |
738 | break; | |
d66e34cd | 739 | |
61eb22d3 UD |
740 | /* If we have no further argument the program was called incorrectly. |
741 | Grant the user some education. */ | |
742 | if (_dl_argc < 2) | |
35fc382a | 743 | _dl_fatal_printf ("\ |
2bcf29ba | 744 | Usage: ld.so [OPTION]... EXECUTABLE-FILE [ARGS-FOR-PROGRAM...]\n\ |
61eb22d3 UD |
745 | You have invoked `ld.so', the helper program for shared library executables.\n\ |
746 | This program usually lives in the file `/lib/ld.so', and special directives\n\ | |
747 | in executable files using ELF shared libraries tell the system's program\n\ | |
748 | loader to load the helper program from this file. This helper program loads\n\ | |
749 | the shared libraries needed by the program executable, prepares the program\n\ | |
750 | to run, and runs it. You may invoke this helper program directly from the\n\ | |
751 | command line to load and run an ELF executable file; this is like executing\n\ | |
752 | that file itself, but always uses this helper program from the file you\n\ | |
753 | specified, instead of the helper program file specified in the executable\n\ | |
754 | file you run. This is mostly of use for maintainers to test new versions\n\ | |
2bcf29ba UD |
755 | of this helper program; chances are you did not intend to run this program.\n\ |
756 | \n\ | |
b0a01055 UD |
757 | --list list all dependencies and how they are resolved\n\ |
758 | --verify verify that given object really is a dynamically linked\n\ | |
e8b1163e | 759 | object we can handle\n\ |
b0a01055 UD |
760 | --library-path PATH use given PATH instead of content of the environment\n\ |
761 | variable LD_LIBRARY_PATH\n\ | |
fcf70d41 | 762 | --inhibit-rpath LIST ignore RUNPATH and RPATH information in object names\n\ |
35fc382a | 763 | in LIST\n"); |
61eb22d3 | 764 | |
0200214b RM |
765 | ++_dl_skip_args; |
766 | --_dl_argc; | |
e6caf4e1 | 767 | ++INTUSE(_dl_argv); |
91f62ce6 | 768 | |
da832465 UD |
769 | /* Initialize the data structures for the search paths for shared |
770 | objects. */ | |
771 | _dl_init_paths (library_path); | |
772 | ||
c70ba488 RM |
773 | /* The initialization of _dl_stack_flags done below assumes the |
774 | executable's PT_GNU_STACK may have been honored by the kernel, and | |
775 | so a PT_GNU_STACK with PF_X set means the stack started out with | |
776 | execute permission. However, this is not really true if the | |
777 | dynamic linker is the executable the kernel loaded. For this | |
778 | case, we must reinitialize _dl_stack_flags to match the dynamic | |
779 | linker itself. If the dynamic linker was built with a | |
780 | PT_GNU_STACK, then the kernel may have loaded us with a | |
781 | nonexecutable stack that we will have to make executable when we | |
782 | load the program below unless it has a PT_GNU_STACK indicating | |
783 | nonexecutable stack is ok. */ | |
784 | ||
785 | for (ph = phdr; ph < &phdr[phnum]; ++ph) | |
786 | if (ph->p_type == PT_GNU_STACK) | |
787 | { | |
788 | GL(dl_stack_flags) = ph->p_flags; | |
789 | break; | |
790 | } | |
ed20b3d9 UD |
791 | else if (ph->p_type == PT_GNU_RELRO) |
792 | { | |
793 | GL(dl_loaded)->l_relro_addr = ph->p_vaddr; | |
794 | GL(dl_loaded)->l_relro_size = ph->p_memsz; | |
795 | } | |
c70ba488 | 796 | |
9a821cf9 | 797 | if (__builtin_expect (mode, normal) == verify) |
2de99474 | 798 | { |
8e17ea58 UD |
799 | const char *objname; |
800 | const char *err_str = NULL; | |
993b3242 | 801 | struct map_args args; |
2de99474 | 802 | |
e6caf4e1 | 803 | args.str = rtld_progname; |
cff26a3e | 804 | (void) INTUSE(_dl_catch_error) (&objname, &err_str, map_doit, &args); |
8e17ea58 | 805 | if (__builtin_expect (err_str != NULL, 0)) |
e6caf4e1 UD |
806 | /* We don't free the returned string, the programs stops |
807 | anyway. */ | |
808 | _exit (EXIT_FAILURE); | |
2de99474 UD |
809 | } |
810 | else | |
db276fa1 UD |
811 | { |
812 | HP_TIMING_NOW (start); | |
5a4b5076 UD |
813 | INTUSE(_dl_map_object) (NULL, rtld_progname, 0, lt_library, 0, |
814 | __RTLD_OPENEXEC); | |
db276fa1 | 815 | HP_TIMING_NOW (stop); |
61e0617a | 816 | |
db276fa1 UD |
817 | HP_TIMING_DIFF (load_time, start, stop); |
818 | } | |
2de99474 | 819 | |
d6b5d570 UD |
820 | phdr = GL(dl_loaded)->l_phdr; |
821 | phnum = GL(dl_loaded)->l_phnum; | |
143e2b96 UD |
822 | /* We overwrite here a pointer to a malloc()ed string. But since |
823 | the malloc() implementation used at this point is the dummy | |
824 | implementations which has no real free() function it does not | |
825 | makes sense to free the old string first. */ | |
d6b5d570 UD |
826 | GL(dl_loaded)->l_name = (char *) ""; |
827 | *user_entry = GL(dl_loaded)->l_entry; | |
0200214b RM |
828 | } |
829 | else | |
830 | { | |
831 | /* Create a link_map for the executable itself. | |
832 | This will be what dlopen on "" returns. */ | |
87c812c2 | 833 | _dl_new_object ((char *) "", "", lt_executable, NULL); |
d6b5d570 | 834 | if (GL(dl_loaded) == NULL) |
35fc382a | 835 | _dl_fatal_printf ("cannot allocate memory for link map\n"); |
d6b5d570 UD |
836 | GL(dl_loaded)->l_phdr = phdr; |
837 | GL(dl_loaded)->l_phnum = phnum; | |
838 | GL(dl_loaded)->l_entry = *user_entry; | |
da832465 | 839 | |
61e0617a UD |
840 | /* At this point we are in a bit of trouble. We would have to |
841 | fill in the values for l_dev and l_ino. But in general we | |
842 | do not know where the file is. We also do not handle AT_EXECFD | |
843 | even if it would be passed up. | |
844 | ||
845 | We leave the values here defined to 0. This is normally no | |
846 | problem as the program code itself is normally no shared | |
847 | object and therefore cannot be loaded dynamically. Nothing | |
848 | prevent the use of dynamic binaries and in these situations | |
849 | we might get problems. We might not be able to find out | |
850 | whether the object is already loaded. But since there is no | |
851 | easy way out and because the dynamic binary must also not | |
852 | have an SONAME we ignore this program for now. If it becomes | |
853 | a problem we can force people using SONAMEs. */ | |
854 | ||
97a51d8a UD |
855 | /* We delay initializing the path structure until we got the dynamic |
856 | information for the program. */ | |
0200214b RM |
857 | } |
858 | ||
d6b5d570 | 859 | GL(dl_loaded)->l_map_end = 0; |
052b6a6c | 860 | /* Perhaps the executable has no PT_LOAD header entries at all. */ |
d6b5d570 | 861 | GL(dl_loaded)->l_map_start = ~0; |
e7beef5f | 862 | /* We opened the file, account for it. */ |
d6b5d570 | 863 | ++GL(dl_loaded)->l_opencount; |
052b6a6c | 864 | |
0200214b | 865 | /* Scan the program header table for the dynamic section. */ |
72f70279 | 866 | for (ph = phdr; ph < &phdr[phnum]; ++ph) |
0200214b RM |
867 | switch (ph->p_type) |
868 | { | |
da832465 UD |
869 | case PT_PHDR: |
870 | /* Find out the load address. */ | |
d6b5d570 | 871 | GL(dl_loaded)->l_addr = (ElfW(Addr)) phdr - ph->p_vaddr; |
da832465 | 872 | break; |
0200214b RM |
873 | case PT_DYNAMIC: |
874 | /* This tells us where to find the dynamic section, | |
875 | which tells us everything we need to do. */ | |
d6b5d570 | 876 | GL(dl_loaded)->l_ld = (void *) GL(dl_loaded)->l_addr + ph->p_vaddr; |
0200214b RM |
877 | break; |
878 | case PT_INTERP: | |
879 | /* This "interpreter segment" was used by the program loader to | |
880 | find the program interpreter, which is this program itself, the | |
881 | dynamic linker. We note what name finds us, so that a future | |
882 | dlopen call or DT_NEEDED entry, for something that wants to link | |
883 | against the dynamic linker as a shared library, will know that | |
884 | the shared object is already loaded. */ | |
d6b5d570 | 885 | _dl_rtld_libname.name = ((const char *) GL(dl_loaded)->l_addr |
be935610 | 886 | + ph->p_vaddr); |
752a2a50 | 887 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 888 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
f41c8091 UD |
889 | |
890 | /* Ordinarilly, we would get additional names for the loader from | |
891 | our DT_SONAME. This can't happen if we were actually linked as | |
892 | a static executable (detect this case when we have no DYNAMIC). | |
893 | If so, assume the filename component of the interpreter path to | |
894 | be our SONAME, and add it to our name list. */ | |
d6b5d570 | 895 | if (GL(dl_rtld_map).l_ld == NULL) |
f41c8091 | 896 | { |
88794e30 UD |
897 | const char *p = NULL; |
898 | const char *cp = _dl_rtld_libname.name; | |
899 | ||
900 | /* Find the filename part of the path. */ | |
901 | while (*cp != '\0') | |
902 | if (*cp++ == '/') | |
903 | p = cp; | |
904 | ||
905 | if (p != NULL) | |
f41c8091 | 906 | { |
88794e30 | 907 | _dl_rtld_libname2.name = p; |
752a2a50 | 908 | /* _dl_rtld_libname2.next = NULL; Already zero. */ |
f41c8091 UD |
909 | _dl_rtld_libname.next = &_dl_rtld_libname2; |
910 | } | |
911 | } | |
912 | ||
164a7164 | 913 | has_interp = true; |
0200214b | 914 | break; |
052b6a6c | 915 | case PT_LOAD: |
052b6a6c UD |
916 | { |
917 | ElfW(Addr) mapstart; | |
2373b30e UD |
918 | ElfW(Addr) allocend; |
919 | ||
920 | /* Remember where the main program starts in memory. */ | |
d6b5d570 UD |
921 | mapstart = (GL(dl_loaded)->l_addr |
922 | + (ph->p_vaddr & ~(ph->p_align - 1))); | |
923 | if (GL(dl_loaded)->l_map_start > mapstart) | |
924 | GL(dl_loaded)->l_map_start = mapstart; | |
2373b30e UD |
925 | |
926 | /* Also where it ends. */ | |
d6b5d570 UD |
927 | allocend = GL(dl_loaded)->l_addr + ph->p_vaddr + ph->p_memsz; |
928 | if (GL(dl_loaded)->l_map_end < allocend) | |
929 | GL(dl_loaded)->l_map_end = allocend; | |
052b6a6c UD |
930 | } |
931 | break; | |
a2f1f5cb UD |
932 | #ifdef USE_TLS |
933 | case PT_TLS: | |
aed283dd UD |
934 | if (ph->p_memsz > 0) |
935 | { | |
936 | /* Note that in the case the dynamic linker we duplicate work | |
937 | here since we read the PT_TLS entry already in | |
938 | _dl_start_final. But the result is repeatable so do not | |
939 | check for this special but unimportant case. */ | |
940 | GL(dl_loaded)->l_tls_blocksize = ph->p_memsz; | |
941 | GL(dl_loaded)->l_tls_align = ph->p_align; | |
99fe3b0e UD |
942 | if (ph->p_align == 0) |
943 | GL(dl_loaded)->l_tls_firstbyte_offset = 0; | |
944 | else | |
945 | GL(dl_loaded)->l_tls_firstbyte_offset = (ph->p_vaddr | |
946 | & (ph->p_align - 1)); | |
aed283dd UD |
947 | GL(dl_loaded)->l_tls_initimage_size = ph->p_filesz; |
948 | GL(dl_loaded)->l_tls_initimage = (void *) ph->p_vaddr; | |
949 | ||
950 | /* This image gets the ID one. */ | |
951 | GL(dl_tls_max_dtv_idx) = GL(dl_loaded)->l_tls_modid = 1; | |
952 | } | |
a2f1f5cb UD |
953 | break; |
954 | #endif | |
ecdeaac0 RM |
955 | case PT_GNU_STACK: |
956 | GL(dl_stack_flags) = ph->p_flags; | |
957 | break; | |
0200214b | 958 | } |
75aafc71 RM |
959 | #ifdef USE_TLS |
960 | /* Adjust the address of the TLS initialization image in case | |
961 | the executable is actually an ET_DYN object. */ | |
962 | if (GL(dl_loaded)->l_tls_initimage != NULL) | |
963 | GL(dl_loaded)->l_tls_initimage | |
964 | = (char *) GL(dl_loaded)->l_tls_initimage + GL(dl_loaded)->l_addr; | |
965 | #endif | |
d6b5d570 UD |
966 | if (! GL(dl_loaded)->l_map_end) |
967 | GL(dl_loaded)->l_map_end = ~0; | |
968 | if (! GL(dl_rtld_map).l_libname && GL(dl_rtld_map).l_name) | |
c84142e8 UD |
969 | { |
970 | /* We were invoked directly, so the program might not have a | |
971 | PT_INTERP. */ | |
d6b5d570 | 972 | _dl_rtld_libname.name = GL(dl_rtld_map).l_name; |
3fb55878 | 973 | /* _dl_rtld_libname.next = NULL; Already zero. */ |
d6b5d570 | 974 | GL(dl_rtld_map).l_libname = &_dl_rtld_libname; |
c84142e8 | 975 | } |
ffee1316 | 976 | else |
d6b5d570 | 977 | assert (GL(dl_rtld_map).l_libname); /* How else did we get here? */ |
0200214b | 978 | |
9a51759b UD |
979 | if (! rtld_is_main) |
980 | { | |
981 | /* Extract the contents of the dynamic section for easy access. */ | |
479aa8ec | 982 | elf_get_dynamic_info (GL(dl_loaded), NULL); |
d6b5d570 | 983 | if (GL(dl_loaded)->l_info[DT_HASH]) |
9a51759b | 984 | /* Set up our cache of pointers into the hash table. */ |
d6b5d570 | 985 | _dl_setup_hash (GL(dl_loaded)); |
9a51759b | 986 | } |
0200214b | 987 | |
9a821cf9 | 988 | if (__builtin_expect (mode, normal) == verify) |
e2102c14 UD |
989 | { |
990 | /* We were called just to verify that this is a dynamic | |
991 | executable using us as the program interpreter. Exit with an | |
992 | error if we were not able to load the binary or no interpreter | |
993 | is specified (i.e., this is no dynamically linked binary. */ | |
d6b5d570 | 994 | if (GL(dl_loaded)->l_ld == NULL) |
e2102c14 | 995 | _exit (1); |
e2102c14 UD |
996 | |
997 | /* We allow here some platform specific code. */ | |
998 | #ifdef DISTINGUISH_LIB_VERSIONS | |
999 | DISTINGUISH_LIB_VERSIONS; | |
1000 | #endif | |
eb406346 | 1001 | _exit (has_interp ? 0 : 2); |
e2102c14 UD |
1002 | } |
1003 | ||
9a51759b | 1004 | if (! rtld_is_main) |
97a51d8a UD |
1005 | /* Initialize the data structures for the search paths for shared |
1006 | objects. */ | |
120b4c49 | 1007 | _dl_init_paths (library_path); |
97a51d8a | 1008 | |
0200214b | 1009 | /* Put the link_map for ourselves on the chain so it can be found by |
ceb2d9aa | 1010 | name. Note that at this point the global chain of link maps contains |
d6b5d570 UD |
1011 | exactly one element, which is pointed to by dl_loaded. */ |
1012 | if (! GL(dl_rtld_map).l_name) | |
ffee1316 RM |
1013 | /* If not invoked directly, the dynamic linker shared object file was |
1014 | found by the PT_INTERP name. */ | |
d6b5d570 UD |
1015 | GL(dl_rtld_map).l_name = (char *) GL(dl_rtld_map).l_libname->name; |
1016 | GL(dl_rtld_map).l_type = lt_library; | |
1017 | GL(dl_loaded)->l_next = &GL(dl_rtld_map); | |
1018 | GL(dl_rtld_map).l_prev = GL(dl_loaded); | |
1019 | ++GL(dl_nloaded); | |
0200214b | 1020 | |
97fd3a30 UD |
1021 | /* If LD_USE_LOAD_BIAS env variable has not been seen, default |
1022 | to not using bias for non-prelinked PIEs and libraries | |
1023 | and using it for executables or prelinked PIEs or libraries. */ | |
1024 | if (GL(dl_use_load_bias) == (ElfW(Addr)) -2) | |
1025 | GL(dl_use_load_bias) = (GL(dl_loaded)->l_addr == 0) ? -1 : 0; | |
1026 | ||
553eca26 UD |
1027 | /* Set up the program header information for the dynamic linker |
1028 | itself. It is needed in the dl_iterate_phdr() callbacks. */ | |
4cfde896 UD |
1029 | ElfW(Ehdr) *rtld_ehdr = (ElfW(Ehdr) *) GL(dl_rtld_map).l_map_start; |
1030 | GL(dl_rtld_map).l_phdr = (ElfW(Phdr) *) (GL(dl_rtld_map).l_map_start | |
553eca26 UD |
1031 | + rtld_ehdr->e_phoff); |
1032 | GL(dl_rtld_map).l_phnum = rtld_ehdr->e_phnum; | |
1033 | ||
14bab8de | 1034 | /* We have two ways to specify objects to preload: via environment |
49c091e5 | 1035 | variable and via the file /etc/ld.so.preload. The latter can also |
14bab8de | 1036 | be used when security is enabled. */ |
2064087b RM |
1037 | preloads = NULL; |
1038 | npreloads = 0; | |
14bab8de | 1039 | |
db33f7d4 | 1040 | if (__builtin_expect (preloadlist != NULL, 0)) |
c4029823 | 1041 | { |
566efee2 UD |
1042 | /* The LD_PRELOAD environment variable gives list of libraries |
1043 | separated by white space or colons that are loaded before the | |
fd26970f UD |
1044 | executable's dependencies and prepended to the global scope |
1045 | list. If the binary is running setuid all elements | |
1046 | containing a '/' are ignored since it is insecure. */ | |
1047 | char *list = strdupa (preloadlist); | |
1048 | char *p; | |
db276fa1 UD |
1049 | |
1050 | HP_TIMING_NOW (start); | |
1051 | ||
9710f75d UD |
1052 | /* Prevent optimizing strsep. Speed is not important here. */ |
1053 | while ((p = (strsep) (&list, " :")) != NULL) | |
e2102c14 | 1054 | if (p[0] != '\0' |
e6caf4e1 | 1055 | && (__builtin_expect (! INTUSE(__libc_enable_secure), 1) |
db33f7d4 | 1056 | || strchr (p, '/') == NULL)) |
fd26970f | 1057 | { |
87837aac UD |
1058 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
1059 | p, 1, | |
1060 | lt_library, | |
cff26a3e | 1061 | 0, 0); |
42c4f32a | 1062 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
1063 | /* It is no duplicate. */ |
1064 | ++npreloads; | |
fd26970f | 1065 | } |
db276fa1 UD |
1066 | |
1067 | HP_TIMING_NOW (stop); | |
1068 | HP_TIMING_DIFF (diff, start, stop); | |
1069 | HP_TIMING_ACCUM_NT (load_time, diff); | |
c4029823 UD |
1070 | } |
1071 | ||
14bab8de UD |
1072 | /* Read the contents of the file. */ |
1073 | file = _dl_sysdep_read_whole_file ("/etc/ld.so.preload", &file_size, | |
1074 | PROT_READ | PROT_WRITE); | |
40b07f5b | 1075 | if (__builtin_expect (file != MAP_FAILED, 0)) |
14bab8de UD |
1076 | { |
1077 | /* Parse the file. It contains names of libraries to be loaded, | |
1078 | separated by white spaces or `:'. It may also contain | |
1079 | comments introduced by `#'. */ | |
1080 | char *problem; | |
1081 | char *runp; | |
1082 | size_t rest; | |
1083 | ||
1084 | /* Eliminate comments. */ | |
1085 | runp = file; | |
1086 | rest = file_size; | |
1087 | while (rest > 0) | |
1088 | { | |
1089 | char *comment = memchr (runp, '#', rest); | |
1090 | if (comment == NULL) | |
1091 | break; | |
1092 | ||
1093 | rest -= comment - runp; | |
1094 | do | |
1095 | *comment = ' '; | |
1096 | while (--rest > 0 && *++comment != '\n'); | |
1097 | } | |
1098 | ||
1099 | /* We have one problematic case: if we have a name at the end of | |
1100 | the file without a trailing terminating characters, we cannot | |
1101 | place the \0. Handle the case separately. */ | |
49891c10 UD |
1102 | if (file[file_size - 1] != ' ' && file[file_size - 1] != '\t' |
1103 | && file[file_size - 1] != '\n' && file[file_size - 1] != ':') | |
14bab8de UD |
1104 | { |
1105 | problem = &file[file_size]; | |
1106 | while (problem > file && problem[-1] != ' ' && problem[-1] != '\t' | |
49891c10 | 1107 | && problem[-1] != '\n' && problem[-1] != ':') |
14bab8de UD |
1108 | --problem; |
1109 | ||
1110 | if (problem > file) | |
1111 | problem[-1] = '\0'; | |
1112 | } | |
1113 | else | |
49891c10 UD |
1114 | { |
1115 | problem = NULL; | |
1116 | file[file_size - 1] = '\0'; | |
1117 | } | |
14bab8de | 1118 | |
db276fa1 UD |
1119 | HP_TIMING_NOW (start); |
1120 | ||
14bab8de UD |
1121 | if (file != problem) |
1122 | { | |
1123 | char *p; | |
e2102c14 | 1124 | runp = file; |
14bab8de | 1125 | while ((p = strsep (&runp, ": \t\n")) != NULL) |
e2102c14 UD |
1126 | if (p[0] != '\0') |
1127 | { | |
cff26a3e AJ |
1128 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), |
1129 | p, 1, | |
1130 | lt_library, | |
1131 | 0, 0); | |
42c4f32a | 1132 | if (++new_map->l_opencount == 1) |
e2102c14 UD |
1133 | /* It is no duplicate. */ |
1134 | ++npreloads; | |
1135 | } | |
14bab8de UD |
1136 | } |
1137 | ||
1138 | if (problem != NULL) | |
1139 | { | |
1140 | char *p = strndupa (problem, file_size - (problem - file)); | |
87837aac UD |
1141 | struct link_map *new_map = INTUSE(_dl_map_object) (GL(dl_loaded), p, |
1142 | 1, lt_library, | |
1143 | 0, 0); | |
42c4f32a | 1144 | if (++new_map->l_opencount == 1) |
bd355af0 UD |
1145 | /* It is no duplicate. */ |
1146 | ++npreloads; | |
14bab8de UD |
1147 | } |
1148 | ||
db276fa1 UD |
1149 | HP_TIMING_NOW (stop); |
1150 | HP_TIMING_DIFF (diff, start, stop); | |
1151 | HP_TIMING_ACCUM_NT (load_time, diff); | |
1152 | ||
14bab8de UD |
1153 | /* We don't need the file anymore. */ |
1154 | __munmap (file, file_size); | |
1155 | } | |
1156 | ||
db33f7d4 | 1157 | if (__builtin_expect (npreloads, 0) != 0) |
14bab8de UD |
1158 | { |
1159 | /* Set up PRELOADS with a vector of the preloaded libraries. */ | |
1160 | struct link_map *l; | |
14bab8de | 1161 | preloads = __alloca (npreloads * sizeof preloads[0]); |
d6b5d570 | 1162 | l = GL(dl_rtld_map).l_next; /* End of the chain before preloads. */ |
14bab8de UD |
1163 | i = 0; |
1164 | do | |
1165 | { | |
1166 | preloads[i++] = l; | |
1167 | l = l->l_next; | |
1168 | } while (l); | |
1169 | assert (i == npreloads); | |
1170 | } | |
1171 | ||
f866314b UD |
1172 | #ifdef NEED_DL_SYSINFO |
1173 | if (GL(dl_sysinfo_dso) != NULL) | |
1174 | { | |
1175 | /* We have a prelinked DSO preloaded by the system. */ | |
1176 | GL(dl_sysinfo) = GL(dl_sysinfo_dso)->e_entry; | |
1177 | ||
1178 | /* Do an abridged version of the work _dl_map_object_from_fd would do | |
1179 | to map in the object. It's already mapped and prelinked (and | |
1180 | better be, since it's read-only and so we couldn't relocate it). | |
1181 | We just want our data structures to describe it as if we had just | |
1182 | mapped and relocated it normally. */ | |
1183 | struct link_map *l = _dl_new_object ((char *) "", "", lt_library, NULL); | |
1184 | if (__builtin_expect (l != NULL, 1)) | |
1185 | { | |
f556dbfa | 1186 | static ElfW(Dyn) dyn_temp[DL_RO_DYN_TEMP_CNT]; |
c776b3d7 UD |
1187 | #ifndef NDEBUG |
1188 | uint_fast16_t pt_load_num = 0; | |
1189 | #endif | |
479aa8ec | 1190 | |
f866314b UD |
1191 | l->l_phdr = ((const void *) GL(dl_sysinfo_dso) |
1192 | + GL(dl_sysinfo_dso)->e_phoff); | |
1193 | l->l_phnum = GL(dl_sysinfo_dso)->e_phnum; | |
1194 | for (uint_fast16_t i = 0; i < l->l_phnum; ++i) | |
1195 | { | |
1196 | const ElfW(Phdr) *const ph = &l->l_phdr[i]; | |
1197 | if (ph->p_type == PT_DYNAMIC) | |
1198 | { | |
1199 | l->l_ld = (void *) ph->p_vaddr; | |
1200 | l->l_ldnum = ph->p_memsz / sizeof (ElfW(Dyn)); | |
1201 | break; | |
1202 | } | |
c776b3d7 | 1203 | #ifndef NDEBUG |
f866314b | 1204 | if (ph->p_type == PT_LOAD) |
c776b3d7 UD |
1205 | { |
1206 | assert (pt_load_num | |
1207 | || (void *) ph->p_vaddr == GL(dl_sysinfo_dso)); | |
1208 | pt_load_num++; | |
1209 | } | |
1210 | #endif | |
f866314b | 1211 | } |
479aa8ec | 1212 | elf_get_dynamic_info (l, dyn_temp); |
f866314b UD |
1213 | _dl_setup_hash (l); |
1214 | l->l_relocated = 1; | |
f28c14d6 | 1215 | l->l_map_start = (ElfW(Addr)) GL(dl_sysinfo_dso); |
f866314b UD |
1216 | |
1217 | /* Now that we have the info handy, use the DSO image's soname | |
b49329d9 RM |
1218 | so this object can be looked up by name. Note that we do not |
1219 | set l_name here. That field gives the file name of the DSO, | |
1220 | and this DSO is not associated with any file. */ | |
f866314b | 1221 | if (l->l_info[DT_SONAME] != NULL) |
f556dbfa UD |
1222 | { |
1223 | /* Work around a kernel problem. The kernel cannot handle | |
1224 | addresses in the vsyscall DSO pages in writev() calls. */ | |
1225 | const char *dsoname = ((char *) D_PTR (l, l_info[DT_STRTAB]) | |
1226 | + l->l_info[DT_SONAME]->d_un.d_val); | |
1227 | size_t len = strlen (dsoname); | |
b49329d9 RM |
1228 | char *copy = malloc (len); |
1229 | if (copy == NULL) | |
f556dbfa | 1230 | _dl_fatal_printf ("out of memory\n"); |
b49329d9 | 1231 | l->l_libname->name = memcpy (copy, dsoname, len); |
f556dbfa | 1232 | } |
f866314b UD |
1233 | } |
1234 | } | |
1235 | #endif | |
1236 | ||
2064087b RM |
1237 | /* Load all the libraries specified by DT_NEEDED entries. If LD_PRELOAD |
1238 | specified some libraries to load, these are inserted before the actual | |
1239 | dependencies in the executable's searchlist for symbol resolution. */ | |
db276fa1 | 1240 | HP_TIMING_NOW (start); |
87837aac UD |
1241 | INTUSE(_dl_map_object_deps) (GL(dl_loaded), preloads, npreloads, |
1242 | mode == trace, 0); | |
db276fa1 UD |
1243 | HP_TIMING_NOW (stop); |
1244 | HP_TIMING_DIFF (diff, start, stop); | |
1245 | HP_TIMING_ACCUM_NT (load_time, diff); | |
e3e35cfc | 1246 | |
42c4f32a UD |
1247 | /* Mark all objects as being in the global scope and set the open |
1248 | counter. */ | |
d6b5d570 | 1249 | for (i = GL(dl_loaded)->l_searchlist.r_nlist; i > 0; ) |
42c4f32a UD |
1250 | { |
1251 | --i; | |
d6b5d570 UD |
1252 | GL(dl_loaded)->l_searchlist.r_list[i]->l_global = 1; |
1253 | ++GL(dl_loaded)->l_searchlist.r_list[i]->l_opencount; | |
42c4f32a | 1254 | } |
d66e34cd | 1255 | |
2064087b | 1256 | #ifndef MAP_ANON |
f332db02 RM |
1257 | /* We are done mapping things, so close the zero-fill descriptor. */ |
1258 | __close (_dl_zerofd); | |
1259 | _dl_zerofd = -1; | |
2064087b | 1260 | #endif |
f332db02 | 1261 | |
f9496a7b | 1262 | /* Remove _dl_rtld_map from the chain. */ |
d6b5d570 UD |
1263 | GL(dl_rtld_map).l_prev->l_next = GL(dl_rtld_map).l_next; |
1264 | if (GL(dl_rtld_map).l_next) | |
1265 | GL(dl_rtld_map).l_next->l_prev = GL(dl_rtld_map).l_prev; | |
f9496a7b | 1266 | |
d6b5d570 | 1267 | if (__builtin_expect (GL(dl_rtld_map).l_opencount > 1, 1)) |
0200214b | 1268 | { |
f9496a7b RM |
1269 | /* Some DT_NEEDED entry referred to the interpreter object itself, so |
1270 | put it back in the list of visible objects. We insert it into the | |
1271 | chain in symbol search order because gdb uses the chain's order as | |
1272 | its symbol search order. */ | |
77aba05b | 1273 | i = 1; |
d6b5d570 | 1274 | while (GL(dl_loaded)->l_searchlist.r_list[i] != &GL(dl_rtld_map)) |
f9496a7b | 1275 | ++i; |
d6b5d570 | 1276 | GL(dl_rtld_map).l_prev = GL(dl_loaded)->l_searchlist.r_list[i - 1]; |
b2bcd61a | 1277 | if (__builtin_expect (mode, normal) == normal) |
d6b5d570 UD |
1278 | GL(dl_rtld_map).l_next = (i + 1 < GL(dl_loaded)->l_searchlist.r_nlist |
1279 | ? GL(dl_loaded)->l_searchlist.r_list[i + 1] | |
1280 | : NULL); | |
b2bcd61a UD |
1281 | else |
1282 | /* In trace mode there might be an invisible object (which we | |
1283 | could not find) after the previous one in the search list. | |
1284 | In this case it doesn't matter much where we put the | |
1285 | interpreter object, so we just initialize the list pointer so | |
1286 | that the assertion below holds. */ | |
d6b5d570 | 1287 | GL(dl_rtld_map).l_next = GL(dl_rtld_map).l_prev->l_next; |
b2bcd61a | 1288 | |
d6b5d570 UD |
1289 | assert (GL(dl_rtld_map).l_prev->l_next == GL(dl_rtld_map).l_next); |
1290 | GL(dl_rtld_map).l_prev->l_next = &GL(dl_rtld_map); | |
3fb55878 | 1291 | if (GL(dl_rtld_map).l_next != NULL) |
f9496a7b | 1292 | { |
d6b5d570 UD |
1293 | assert (GL(dl_rtld_map).l_next->l_prev == GL(dl_rtld_map).l_prev); |
1294 | GL(dl_rtld_map).l_next->l_prev = &GL(dl_rtld_map); | |
f9496a7b | 1295 | } |
0200214b | 1296 | } |
d66e34cd | 1297 | |
c84142e8 UD |
1298 | /* Now let us see whether all libraries are available in the |
1299 | versions we need. */ | |
1300 | { | |
993b3242 UD |
1301 | struct version_check_args args; |
1302 | args.doexit = mode == normal; | |
145b8413 | 1303 | args.dotrace = mode == trace; |
993b3242 | 1304 | _dl_receive_error (print_missing_version, version_check_doit, &args); |
c84142e8 UD |
1305 | } |
1306 | ||
bff334e0 UD |
1307 | #ifdef USE_TLS |
1308 | /* Now it is time to determine the layout of the static TLS block | |
1309 | and allocate it for the initial thread. Note that we always | |
1310 | allocate the static block, we never defer it even if no | |
1311 | DF_STATIC_TLS bit is set. The reason is that we know glibc will | |
1312 | use the static model. First add the dynamic linker to the list | |
1313 | if it also uses TLS. */ | |
1314 | if (GL(dl_rtld_map).l_tls_blocksize != 0) | |
1315 | /* Assign a module ID. */ | |
1316 | GL(dl_rtld_map).l_tls_modid = _dl_next_tls_modid (); | |
1317 | ||
131fd126 UD |
1318 | # ifndef TLS_INIT_TP_EXPENSIVE |
1319 | # define TLS_INIT_TP_EXPENSIVE 0 | |
1320 | # endif | |
1321 | ||
2d148689 RM |
1322 | /* We do not initialize any of the TLS functionality unless any of the |
1323 | initial modules uses TLS. This makes dynamic loading of modules with | |
1324 | TLS impossible, but to support it requires either eagerly doing setup | |
1325 | now or lazily doing it later. Doing it now makes us incompatible with | |
1326 | an old kernel that can't perform TLS_INIT_TP, even if no TLS is ever | |
1327 | used. Trying to do it lazily is too hairy to try when there could be | |
1328 | multiple threads (from a non-TLS-using libpthread). */ | |
bbe35eb5 | 1329 | if (!TLS_INIT_TP_EXPENSIVE || GL(dl_tls_max_dtv_idx) > 0) |
bff334e0 UD |
1330 | { |
1331 | struct link_map *l; | |
1332 | size_t nelem; | |
1333 | struct dtv_slotinfo *slotinfo; | |
1334 | ||
1335 | /* Number of elements in the static TLS block. */ | |
1336 | GL(dl_tls_static_nelem) = GL(dl_tls_max_dtv_idx); | |
1337 | ||
1338 | /* Allocate the array which contains the information about the | |
1339 | dtv slots. We allocate a few entries more than needed to | |
1340 | avoid the need for reallocation. */ | |
1341 | nelem = GL(dl_tls_max_dtv_idx) + 1 + TLS_SLOTINFO_SURPLUS; | |
1342 | ||
1343 | /* Allocate. */ | |
1344 | GL(dl_tls_dtv_slotinfo_list) = (struct dtv_slotinfo_list *) | |
1345 | malloc (sizeof (struct dtv_slotinfo_list) | |
1346 | + nelem * sizeof (struct dtv_slotinfo)); | |
1347 | /* No need to check the return value. If memory allocation failed | |
1348 | the program would have been terminated. */ | |
1349 | ||
1350 | slotinfo = memset (GL(dl_tls_dtv_slotinfo_list)->slotinfo, '\0', | |
1351 | nelem * sizeof (struct dtv_slotinfo)); | |
1352 | GL(dl_tls_dtv_slotinfo_list)->len = nelem; | |
1353 | GL(dl_tls_dtv_slotinfo_list)->next = NULL; | |
1354 | ||
1355 | /* Fill in the information from the loaded modules. */ | |
1356 | for (l = GL(dl_loaded), i = 0; l != NULL; l = l->l_next) | |
1357 | if (l->l_tls_blocksize != 0) | |
1358 | /* This is a module with TLS data. Store the map reference. | |
1359 | The generation counter is zero. */ | |
1360 | slotinfo[++i].map = l; | |
1361 | assert (i == GL(dl_tls_max_dtv_idx)); | |
1362 | ||
216455bc | 1363 | /* Compute the TLS offsets for the various blocks. */ |
bff334e0 UD |
1364 | _dl_determine_tlsoffset (); |
1365 | ||
1366 | /* Construct the static TLS block and the dtv for the initial | |
1367 | thread. For some platforms this will include allocating memory | |
1368 | for the thread descriptor. The memory for the TLS block will | |
1369 | never be freed. It should be allocated accordingly. The dtv | |
1370 | array can be changed if dynamic loading requires it. */ | |
a816b435 | 1371 | tcbp = _dl_allocate_tls_storage (); |
bff334e0 UD |
1372 | if (tcbp == NULL) |
1373 | _dl_fatal_printf ("\ | |
935f95dd | 1374 | cannot allocate TLS data structures for initial thread"); |
08da0621 RM |
1375 | |
1376 | /* Store for detection of the special case by __tls_get_addr | |
1377 | so it knows not to pass this dtv to the normal realloc. */ | |
8784cc18 | 1378 | GL(dl_initial_dtv) = GET_DTV (tcbp); |
bff334e0 UD |
1379 | } |
1380 | #endif | |
1381 | ||
9a821cf9 | 1382 | if (__builtin_expect (mode, normal) != normal) |
0200214b RM |
1383 | { |
1384 | /* We were run just to list the shared libraries. It is | |
1385 | important that we do this before real relocation, because the | |
1386 | functions we call below for output may no longer work properly | |
1387 | after relocation. */ | |
81f3ac4c UD |
1388 | struct link_map *l; |
1389 | ||
1390 | if (GL(dl_debug_mask) & DL_DEBUG_PRELINK) | |
ceb2d9aa | 1391 | { |
81f3ac4c | 1392 | struct r_scope_elem *scope = &GL(dl_loaded)->l_searchlist; |
ceb2d9aa | 1393 | |
81f3ac4c | 1394 | for (i = 0; i < scope->r_nlist; i++) |
32e6df36 | 1395 | { |
81f3ac4c UD |
1396 | l = scope->r_list [i]; |
1397 | if (l->l_faked) | |
32e6df36 | 1398 | { |
81f3ac4c UD |
1399 | _dl_printf ("\t%s => not found\n", l->l_libname->name); |
1400 | continue; | |
1401 | } | |
1402 | if (_dl_name_match_p (GL(dl_trace_prelink), l)) | |
1403 | GL(dl_trace_prelink_map) = l; | |
1404 | _dl_printf ("\t%s => %s (0x%0*Zx, 0x%0*Zx)", | |
1405 | l->l_libname->name[0] ? l->l_libname->name | |
1406 | : rtld_progname ?: "<main program>", | |
1407 | l->l_name[0] ? l->l_name | |
1408 | : rtld_progname ?: "<main program>", | |
d347a4ab UD |
1409 | (int) sizeof l->l_map_start * 2, |
1410 | (size_t) l->l_map_start, | |
1411 | (int) sizeof l->l_addr * 2, | |
1412 | (size_t) l->l_addr); | |
bff334e0 | 1413 | #ifdef USE_TLS |
81f3ac4c UD |
1414 | if (l->l_tls_modid) |
1415 | _dl_printf (" TLS(0x%Zx, 0x%0*Zx)\n", l->l_tls_modid, | |
1416 | (int) sizeof l->l_tls_offset * 2, | |
d347a4ab | 1417 | (size_t) l->l_tls_offset); |
81f3ac4c | 1418 | else |
bff334e0 | 1419 | #endif |
81f3ac4c | 1420 | _dl_printf ("\n"); |
32e6df36 | 1421 | } |
ceb2d9aa | 1422 | } |
81f3ac4c UD |
1423 | else if (! GL(dl_loaded)->l_info[DT_NEEDED]) |
1424 | _dl_printf ("\tstatically linked\n"); | |
1425 | else | |
1426 | { | |
1427 | for (l = GL(dl_loaded)->l_next; l; l = l->l_next) | |
1428 | if (l->l_faked) | |
1429 | /* The library was not found. */ | |
1430 | _dl_printf ("\t%s => not found\n", l->l_libname->name); | |
1431 | else | |
1432 | _dl_printf ("\t%s => %s (0x%0*Zx)\n", l->l_libname->name, | |
1433 | l->l_name, (int) sizeof l->l_map_start * 2, | |
d347a4ab | 1434 | (size_t) l->l_map_start); |
81f3ac4c | 1435 | } |
1a3a58fd | 1436 | |
9a821cf9 | 1437 | if (__builtin_expect (mode, trace) != trace) |
5a47e7f2 | 1438 | for (i = 1; i < (unsigned int) _dl_argc; ++i) |
cddcfecf RM |
1439 | { |
1440 | const ElfW(Sym) *ref = NULL; | |
c0282c06 UD |
1441 | ElfW(Addr) loadbase; |
1442 | lookup_t result; | |
c0282c06 | 1443 | |
e6caf4e1 UD |
1444 | result = INTUSE(_dl_lookup_symbol) (INTUSE(_dl_argv)[i], |
1445 | GL(dl_loaded), | |
cff26a3e AJ |
1446 | &ref, GL(dl_loaded)->l_scope, |
1447 | ELF_RTYPE_CLASS_PLT, 1); | |
c0282c06 UD |
1448 | |
1449 | loadbase = LOOKUP_VALUE_ADDRESS (result); | |
1450 | ||
35fc382a | 1451 | _dl_printf ("%s found at 0x%0*Zd in object at 0x%0*Zd\n", |
e6caf4e1 | 1452 | INTUSE(_dl_argv)[i], |
d347a4ab UD |
1453 | (int) sizeof ref->st_value * 2, |
1454 | (size_t) ref->st_value, | |
1455 | (int) sizeof loadbase * 2, (size_t) loadbase); | |
cddcfecf | 1456 | } |
ce37fa88 | 1457 | else |
fd26970f | 1458 | { |
667b0577 | 1459 | /* If LD_WARN is set warn about undefined symbols. */ |
5688da55 | 1460 | if (GL(dl_lazy) >= 0 && GL(dl_verbose)) |
ce37fa88 UD |
1461 | { |
1462 | /* We have to do symbol dependency testing. */ | |
1463 | struct relocate_args args; | |
1464 | struct link_map *l; | |
993b3242 | 1465 | |
5688da55 | 1466 | args.lazy = GL(dl_lazy); |
fd26970f | 1467 | |
d6b5d570 | 1468 | l = GL(dl_loaded); |
ce37fa88 UD |
1469 | while (l->l_next) |
1470 | l = l->l_next; | |
1471 | do | |
1472 | { | |
d6b5d570 | 1473 | if (l != &GL(dl_rtld_map) && ! l->l_faked) |
ce37fa88 UD |
1474 | { |
1475 | args.l = l; | |
1476 | _dl_receive_error (print_unresolved, relocate_doit, | |
1477 | &args); | |
ce37fa88 UD |
1478 | } |
1479 | l = l->l_prev; | |
1480 | } while (l); | |
32e6df36 | 1481 | |
d6b5d570 UD |
1482 | if ((GL(dl_debug_mask) & DL_DEBUG_PRELINK) |
1483 | && GL(dl_rtld_map).l_opencount > 1) | |
cff26a3e AJ |
1484 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), |
1485 | GL(dl_loaded)->l_scope, 0, 0); | |
ce37fa88 UD |
1486 | } |
1487 | ||
b0982c4a | 1488 | #define VERNEEDTAG (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (DT_VERNEED)) |
120b4c49 | 1489 | if (version_info) |
fd26970f | 1490 | { |
ce37fa88 UD |
1491 | /* Print more information. This means here, print information |
1492 | about the versions needed. */ | |
1493 | int first = 1; | |
d6b5d570 | 1494 | struct link_map *map = GL(dl_loaded); |
ce37fa88 | 1495 | |
d6b5d570 | 1496 | for (map = GL(dl_loaded); map != NULL; map = map->l_next) |
fd26970f | 1497 | { |
f41c8091 | 1498 | const char *strtab; |
ce37fa88 | 1499 | ElfW(Dyn) *dyn = map->l_info[VERNEEDTAG]; |
f41c8091 UD |
1500 | ElfW(Verneed) *ent; |
1501 | ||
1502 | if (dyn == NULL) | |
1503 | continue; | |
1504 | ||
a42195db | 1505 | strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); |
f41c8091 | 1506 | ent = (ElfW(Verneed) *) (map->l_addr + dyn->d_un.d_ptr); |
ce37fa88 | 1507 | |
f41c8091 | 1508 | if (first) |
ce37fa88 | 1509 | { |
35fc382a | 1510 | _dl_printf ("\n\tVersion information:\n"); |
f41c8091 UD |
1511 | first = 0; |
1512 | } | |
ce37fa88 | 1513 | |
35fc382a | 1514 | _dl_printf ("\t%s:\n", |
e6caf4e1 | 1515 | map->l_name[0] ? map->l_name : rtld_progname); |
f41c8091 UD |
1516 | |
1517 | while (1) | |
1518 | { | |
1519 | ElfW(Vernaux) *aux; | |
1520 | struct link_map *needed; | |
ce37fa88 | 1521 | |
f41c8091 UD |
1522 | needed = find_needed (strtab + ent->vn_file); |
1523 | aux = (ElfW(Vernaux) *) ((char *) ent + ent->vn_aux); | |
ce37fa88 UD |
1524 | |
1525 | while (1) | |
1526 | { | |
f41c8091 UD |
1527 | const char *fname = NULL; |
1528 | ||
f41c8091 | 1529 | if (needed != NULL |
ba9fcb3f UD |
1530 | && match_version (strtab + aux->vna_name, |
1531 | needed)) | |
f41c8091 UD |
1532 | fname = needed->l_name; |
1533 | ||
35fc382a UD |
1534 | _dl_printf ("\t\t%s (%s) %s=> %s\n", |
1535 | strtab + ent->vn_file, | |
1536 | strtab + aux->vna_name, | |
1537 | aux->vna_flags & VER_FLG_WEAK | |
1538 | ? "[WEAK] " : "", | |
1539 | fname ?: "not found"); | |
ce37fa88 | 1540 | |
f41c8091 UD |
1541 | if (aux->vna_next == 0) |
1542 | /* No more symbols. */ | |
ce37fa88 UD |
1543 | break; |
1544 | ||
f41c8091 UD |
1545 | /* Next symbol. */ |
1546 | aux = (ElfW(Vernaux) *) ((char *) aux | |
1547 | + aux->vna_next); | |
ce37fa88 | 1548 | } |
f41c8091 UD |
1549 | |
1550 | if (ent->vn_next == 0) | |
1551 | /* No more dependencies. */ | |
1552 | break; | |
1553 | ||
1554 | /* Next dependency. */ | |
1555 | ent = (ElfW(Verneed) *) ((char *) ent + ent->vn_next); | |
ce37fa88 | 1556 | } |
fd26970f | 1557 | } |
ce37fa88 | 1558 | } |
fd26970f | 1559 | } |
d66e34cd | 1560 | |
0200214b RM |
1561 | _exit (0); |
1562 | } | |
86d2c878 | 1563 | |
d6b5d570 UD |
1564 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)] |
1565 | && ! __builtin_expect (GL(dl_profile) != NULL, 0)) | |
32e6df36 UD |
1566 | { |
1567 | ElfW(Lib) *liblist, *liblistend; | |
1568 | struct link_map **r_list, **r_listend, *l; | |
9710f75d UD |
1569 | const char *strtab = (const void *) D_PTR (GL(dl_loaded), |
1570 | l_info[DT_STRTAB]); | |
32e6df36 | 1571 | |
d6b5d570 | 1572 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)] != NULL); |
32e6df36 | 1573 | liblist = (ElfW(Lib) *) |
d6b5d570 | 1574 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_LIBLIST)]->d_un.d_ptr; |
32e6df36 UD |
1575 | liblistend = (ElfW(Lib) *) |
1576 | ((char *) liblist | |
d6b5d570 UD |
1577 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_LIBLISTSZ)]->d_un.d_val); |
1578 | r_list = GL(dl_loaded)->l_searchlist.r_list; | |
1579 | r_listend = r_list + GL(dl_loaded)->l_searchlist.r_nlist; | |
32e6df36 UD |
1580 | |
1581 | for (; r_list < r_listend && liblist < liblistend; r_list++) | |
1582 | { | |
1583 | l = *r_list; | |
1584 | ||
d6b5d570 | 1585 | if (l == GL(dl_loaded)) |
32e6df36 UD |
1586 | continue; |
1587 | ||
1588 | /* If the library is not mapped where it should, fail. */ | |
1589 | if (l->l_addr) | |
1590 | break; | |
1591 | ||
1592 | /* Next, check if checksum matches. */ | |
1593 | if (l->l_info [VALIDX(DT_CHECKSUM)] == NULL | |
1594 | || l->l_info [VALIDX(DT_CHECKSUM)]->d_un.d_val | |
1595 | != liblist->l_checksum) | |
1596 | break; | |
1597 | ||
1598 | if (l->l_info [VALIDX(DT_GNU_PRELINKED)] == NULL | |
1599 | || l->l_info [VALIDX(DT_GNU_PRELINKED)]->d_un.d_val | |
1600 | != liblist->l_time_stamp) | |
1601 | break; | |
1602 | ||
1603 | if (! _dl_name_match_p (strtab + liblist->l_name, l)) | |
1604 | break; | |
1605 | ||
1606 | ++liblist; | |
1607 | } | |
1608 | ||
1609 | ||
1610 | if (r_list == r_listend && liblist == liblistend) | |
164a7164 | 1611 | prelinked = true; |
32e6df36 | 1612 | |
d6b5d570 | 1613 | if (__builtin_expect (GL(dl_debug_mask) & DL_DEBUG_LIBS, 0)) |
32e6df36 UD |
1614 | _dl_printf ("\nprelink checking: %s\n", prelinked ? "ok" : "failed"); |
1615 | } | |
1616 | ||
ed20b3d9 UD |
1617 | |
1618 | /* Initialize _r_debug. */ | |
1619 | struct r_debug *r = _dl_debug_initialize (GL(dl_rtld_map).l_addr); | |
1620 | { | |
1621 | struct link_map *l; | |
1622 | ||
1623 | l = GL(dl_loaded); | |
1624 | ||
1625 | #ifdef ELF_MACHINE_DEBUG_SETUP | |
1626 | ||
1627 | /* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */ | |
1628 | ||
1629 | ELF_MACHINE_DEBUG_SETUP (l, r); | |
1630 | ELF_MACHINE_DEBUG_SETUP (&GL(dl_rtld_map), r); | |
1631 | ||
1632 | #else | |
1633 | ||
1634 | if (l->l_info[DT_DEBUG] != NULL) | |
1635 | /* There is a DT_DEBUG entry in the dynamic section. Fill it in | |
1636 | with the run-time address of the r_debug structure */ | |
1637 | l->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1638 | ||
1639 | /* Fill in the pointer in the dynamic linker's own dynamic section, in | |
1640 | case you run gdb on the dynamic linker directly. */ | |
1641 | if (GL(dl_rtld_map).l_info[DT_DEBUG] != NULL) | |
1642 | GL(dl_rtld_map).l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r; | |
1643 | #endif | |
1644 | } | |
1645 | ||
32e6df36 UD |
1646 | if (prelinked) |
1647 | { | |
d89ae1d5 RM |
1648 | struct link_map *l; |
1649 | ||
d6b5d570 | 1650 | if (GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)] != NULL) |
32e6df36 UD |
1651 | { |
1652 | ElfW(Rela) *conflict, *conflictend; | |
1653 | #ifndef HP_TIMING_NONAVAIL | |
1654 | hp_timing_t start; | |
1655 | hp_timing_t stop; | |
1656 | #endif | |
1657 | ||
1658 | HP_TIMING_NOW (start); | |
d6b5d570 | 1659 | assert (GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)] != NULL); |
32e6df36 | 1660 | conflict = (ElfW(Rela) *) |
d89ae1d5 | 1661 | GL(dl_loaded)->l_info [ADDRIDX (DT_GNU_CONFLICT)]->d_un.d_ptr; |
32e6df36 | 1662 | conflictend = (ElfW(Rela) *) |
d89ae1d5 RM |
1663 | ((char *) conflict |
1664 | + GL(dl_loaded)->l_info [VALIDX (DT_GNU_CONFLICTSZ)]->d_un.d_val); | |
d6b5d570 | 1665 | _dl_resolve_conflicts (GL(dl_loaded), conflict, conflictend); |
32e6df36 UD |
1666 | HP_TIMING_NOW (stop); |
1667 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1668 | } | |
1669 | ||
d89ae1d5 RM |
1670 | |
1671 | /* Mark all the objects so we know they have been already relocated. */ | |
1672 | for (l = GL(dl_loaded); l != NULL; l = l->l_next) | |
1673 | l->l_relocated = 1; | |
1674 | ||
32e6df36 UD |
1675 | _dl_sysdep_start_cleanup (); |
1676 | } | |
1677 | else | |
164a7164 UD |
1678 | { |
1679 | /* Now we have all the objects loaded. Relocate them all except for | |
1680 | the dynamic linker itself. We do this in reverse order so that copy | |
1681 | relocs of earlier objects overwrite the data written by later | |
1682 | objects. We do not re-relocate the dynamic linker itself in this | |
1683 | loop because that could result in the GOT entries for functions we | |
1684 | call being changed, and that would break us. It is safe to relocate | |
1685 | the dynamic linker out of order because it has no copy relocs (we | |
1686 | know that because it is self-contained). */ | |
1687 | ||
1688 | struct link_map *l; | |
1689 | int consider_profiling = GL(dl_profile) != NULL; | |
8b07d6a8 | 1690 | #ifndef HP_TIMING_NONAVAIL |
164a7164 UD |
1691 | hp_timing_t start; |
1692 | hp_timing_t stop; | |
1693 | hp_timing_t add; | |
8b07d6a8 | 1694 | #endif |
c0fb8a56 | 1695 | |
164a7164 UD |
1696 | /* If we are profiling we also must do lazy reloaction. */ |
1697 | GL(dl_lazy) |= consider_profiling; | |
c0fb8a56 | 1698 | |
164a7164 UD |
1699 | l = GL(dl_loaded); |
1700 | while (l->l_next) | |
1701 | l = l->l_next; | |
db276fa1 | 1702 | |
164a7164 UD |
1703 | HP_TIMING_NOW (start); |
1704 | do | |
1705 | { | |
1706 | /* While we are at it, help the memory handling a bit. We have to | |
1707 | mark some data structures as allocated with the fake malloc() | |
1708 | implementation in ld.so. */ | |
1709 | struct libname_list *lnp = l->l_libname->next; | |
752a2a50 | 1710 | |
164a7164 UD |
1711 | while (__builtin_expect (lnp != NULL, 0)) |
1712 | { | |
1713 | lnp->dont_free = 1; | |
1714 | lnp = lnp->next; | |
1715 | } | |
752a2a50 | 1716 | |
164a7164 | 1717 | if (l != &GL(dl_rtld_map)) |
cff26a3e AJ |
1718 | INTUSE(_dl_relocate_object) (l, l->l_scope, GL(dl_lazy), |
1719 | consider_profiling); | |
be935610 | 1720 | |
164a7164 UD |
1721 | l = l->l_prev; |
1722 | } | |
1723 | while (l); | |
1724 | HP_TIMING_NOW (stop); | |
1725 | ||
1726 | HP_TIMING_DIFF (relocate_time, start, stop); | |
1727 | ||
1728 | /* Do any necessary cleanups for the startup OS interface code. | |
1729 | We do these now so that no calls are made after rtld re-relocation | |
1730 | which might be resolved to different functions than we expect. | |
1731 | We cannot do this before relocating the other objects because | |
1732 | _dl_relocate_object might need to call `mprotect' for DT_TEXTREL. */ | |
1733 | _dl_sysdep_start_cleanup (); | |
1734 | ||
1735 | /* Now enable profiling if needed. Like the previous call, | |
1736 | this has to go here because the calls it makes should use the | |
1737 | rtld versions of the functions (particularly calloc()), but it | |
1738 | needs to have _dl_profile_map set up by the relocator. */ | |
1739 | if (__builtin_expect (GL(dl_profile_map) != NULL, 0)) | |
1740 | /* We must prepare the profiling. */ | |
cff26a3e | 1741 | INTUSE(_dl_start_profile) (GL(dl_profile_map), GL(dl_profile_output)); |
164a7164 UD |
1742 | |
1743 | if (GL(dl_rtld_map).l_opencount > 1) | |
1744 | { | |
1745 | /* There was an explicit ref to the dynamic linker as a shared lib. | |
1746 | Re-relocate ourselves with user-controlled symbol definitions. */ | |
1747 | HP_TIMING_NOW (start); | |
cff26a3e AJ |
1748 | INTUSE(_dl_relocate_object) (&GL(dl_rtld_map), GL(dl_loaded)->l_scope, |
1749 | 0, 0); | |
164a7164 UD |
1750 | HP_TIMING_NOW (stop); |
1751 | HP_TIMING_DIFF (add, start, stop); | |
1752 | HP_TIMING_ACCUM_NT (relocate_time, add); | |
1753 | } | |
1754 | } | |
ac16e905 | 1755 | |
be935610 | 1756 | /* Now set up the variable which helps the assembler startup code. */ |
d6b5d570 UD |
1757 | GL(dl_main_searchlist) = &GL(dl_loaded)->l_searchlist; |
1758 | GL(dl_global_scope)[0] = &GL(dl_loaded)->l_searchlist; | |
be935610 | 1759 | |
32e6df36 | 1760 | /* Save the information about the original global scope list since |
604510f7 | 1761 | we need it in the memory handling later. */ |
d6b5d570 | 1762 | GL(dl_initial_searchlist) = *GL(dl_main_searchlist); |
604510f7 | 1763 | |
131fd126 UD |
1764 | #ifndef NONTLS_INIT_TP |
1765 | # define NONTLS_INIT_TP do { } while (0) | |
1766 | #endif | |
1767 | ||
a816b435 | 1768 | #ifdef USE_TLS |
131fd126 | 1769 | if (GL(dl_tls_max_dtv_idx) > 0 || USE___THREAD || !TLS_INIT_TP_EXPENSIVE) |
a816b435 RM |
1770 | { |
1771 | /* Now that we have completed relocation, the initializer data | |
1772 | for the TLS blocks has its final values and we can copy them | |
1773 | into the main thread's TLS area, which we allocated above. */ | |
1774 | _dl_allocate_tls_init (tcbp); | |
1775 | ||
ce460d04 RM |
1776 | /* And finally install it for the main thread. If ld.so itself uses |
1777 | TLS we know the thread pointer was initialized earlier. */ | |
fde89ad0 RM |
1778 | const char *lossage = TLS_INIT_TP (tcbp, USE___THREAD); |
1779 | if (__builtin_expect (lossage != NULL, 0)) | |
1780 | _dl_fatal_printf ("cannot set up thread-local storage: %s\n", lossage); | |
a816b435 | 1781 | } |
131fd126 | 1782 | else |
a816b435 | 1783 | #endif |
131fd126 | 1784 | NONTLS_INIT_TP; |
a816b435 | 1785 | |
ed20b3d9 UD |
1786 | /* Notify the debugger that all objects are now mapped in. */ |
1787 | r->r_state = RT_ADD; | |
1788 | INTUSE(_dl_debug_state) (); | |
0200214b | 1789 | |
08cac4ac UD |
1790 | #ifndef MAP_COPY |
1791 | /* We must munmap() the cache file. */ | |
cff26a3e | 1792 | INTUSE(_dl_unload_cache) (); |
08cac4ac UD |
1793 | #endif |
1794 | ||
d66e34cd RM |
1795 | /* Once we return, _dl_sysdep_start will invoke |
1796 | the DT_INIT functions and then *USER_ENTRY. */ | |
1797 | } | |
fd26970f UD |
1798 | \f |
1799 | /* This is a little helper function for resolving symbols while | |
1800 | tracing the binary. */ | |
1801 | static void | |
c84142e8 UD |
1802 | print_unresolved (int errcode __attribute__ ((unused)), const char *objname, |
1803 | const char *errstring) | |
fd26970f | 1804 | { |
3996f34b | 1805 | if (objname[0] == '\0') |
e6caf4e1 | 1806 | objname = rtld_progname ?: "<main program>"; |
35fc382a | 1807 | _dl_error_printf ("%s (%s)\n", errstring, objname); |
fd26970f | 1808 | } |
c84142e8 UD |
1809 | \f |
1810 | /* This is a little helper function for resolving symbols while | |
1811 | tracing the binary. */ | |
1812 | static void | |
1813 | print_missing_version (int errcode __attribute__ ((unused)), | |
1814 | const char *objname, const char *errstring) | |
1815 | { | |
e6caf4e1 | 1816 | _dl_error_printf ("%s: %s: %s\n", rtld_progname ?: "<program name unknown>", |
35fc382a | 1817 | objname, errstring); |
c84142e8 | 1818 | } |
ea278354 | 1819 | \f |
7dea968e | 1820 | /* Nonzero if any of the debugging options is enabled. */ |
392a6b52 | 1821 | static int any_debug attribute_relro; |
7dea968e | 1822 | |
b5efde2f UD |
1823 | /* Process the string given as the parameter which explains which debugging |
1824 | options are enabled. */ | |
1825 | static void | |
14c44e2e | 1826 | process_dl_debug (const char *dl_debug) |
b5efde2f | 1827 | { |
3e2040c8 UD |
1828 | /* When adding new entries make sure that the maximal length of a name |
1829 | is correctly handled in the LD_DEBUG_HELP code below. */ | |
1830 | static const struct | |
1831 | { | |
379d4ec4 UD |
1832 | unsigned char len; |
1833 | const char name[10]; | |
3e2040c8 UD |
1834 | const char helptext[41]; |
1835 | unsigned short int mask; | |
1836 | } debopts[] = | |
1837 | { | |
379d4ec4 UD |
1838 | #define LEN_AND_STR(str) sizeof (str) - 1, str |
1839 | { LEN_AND_STR ("libs"), "display library search paths", | |
3e2040c8 | 1840 | DL_DEBUG_LIBS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1841 | { LEN_AND_STR ("reloc"), "display relocation processing", |
3e2040c8 | 1842 | DL_DEBUG_RELOC | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1843 | { LEN_AND_STR ("files"), "display progress for input file", |
3e2040c8 | 1844 | DL_DEBUG_FILES | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1845 | { LEN_AND_STR ("symbols"), "display symbol table processing", |
3e2040c8 | 1846 | DL_DEBUG_SYMBOLS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1847 | { LEN_AND_STR ("bindings"), "display information about symbol binding", |
3e2040c8 | 1848 | DL_DEBUG_BINDINGS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1849 | { LEN_AND_STR ("versions"), "display version dependencies", |
3e2040c8 | 1850 | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, |
379d4ec4 | 1851 | { LEN_AND_STR ("all"), "all previous options combined", |
3e2040c8 UD |
1852 | DL_DEBUG_LIBS | DL_DEBUG_RELOC | DL_DEBUG_FILES | DL_DEBUG_SYMBOLS |
1853 | | DL_DEBUG_BINDINGS | DL_DEBUG_VERSIONS | DL_DEBUG_IMPCALLS }, | |
379d4ec4 | 1854 | { LEN_AND_STR ("statistics"), "display relocation statistics", |
3e2040c8 | 1855 | DL_DEBUG_STATISTICS }, |
379d4ec4 | 1856 | { LEN_AND_STR ("help"), "display this help message and exit", |
3e2040c8 UD |
1857 | DL_DEBUG_HELP }, |
1858 | }; | |
1859 | #define ndebopts (sizeof (debopts) / sizeof (debopts[0])) | |
3e2040c8 | 1860 | |
379d4ec4 UD |
1861 | /* Skip separating white spaces and commas. */ |
1862 | while (*dl_debug != '\0') | |
b5efde2f | 1863 | { |
379d4ec4 | 1864 | if (*dl_debug != ' ' && *dl_debug != ',' && *dl_debug != ':') |
b5efde2f | 1865 | { |
3e2040c8 | 1866 | size_t cnt; |
379d4ec4 | 1867 | size_t len = 1; |
77aba05b | 1868 | |
379d4ec4 UD |
1869 | while (dl_debug[len] != '\0' && dl_debug[len] != ' ' |
1870 | && dl_debug[len] != ',' && dl_debug[len] != ':') | |
1871 | ++len; | |
14c44e2e | 1872 | |
3e2040c8 | 1873 | for (cnt = 0; cnt < ndebopts; ++cnt) |
379d4ec4 UD |
1874 | if (debopts[cnt].len == len |
1875 | && memcmp (dl_debug, debopts[cnt].name, len) == 0) | |
3e2040c8 | 1876 | { |
d6b5d570 | 1877 | GL(dl_debug_mask) |= debopts[cnt].mask; |
5688da55 | 1878 | any_debug = 1; |
3e2040c8 UD |
1879 | break; |
1880 | } | |
77aba05b | 1881 | |
3e2040c8 UD |
1882 | if (cnt == ndebopts) |
1883 | { | |
1884 | /* Display a warning and skip everything until next | |
1885 | separator. */ | |
1886 | char *copy = strndupa (dl_debug, len); | |
1887 | _dl_error_printf ("\ | |
1888 | warning: debug option `%s' unknown; try LD_DEBUG=help\n", copy); | |
379d4ec4 UD |
1889 | } |
1890 | ||
1891 | dl_debug += len; | |
1892 | continue; | |
3e2040c8 | 1893 | } |
379d4ec4 UD |
1894 | |
1895 | ++dl_debug; | |
3e2040c8 | 1896 | } |
77aba05b | 1897 | |
d6b5d570 | 1898 | if (GL(dl_debug_mask) & DL_DEBUG_HELP) |
3e2040c8 UD |
1899 | { |
1900 | size_t cnt; | |
14c44e2e | 1901 | |
3e2040c8 UD |
1902 | _dl_printf ("\ |
1903 | Valid options for the LD_DEBUG environment variable are:\n\n"); | |
db276fa1 | 1904 | |
3e2040c8 | 1905 | for (cnt = 0; cnt < ndebopts; ++cnt) |
37d8b778 UD |
1906 | _dl_printf (" %.*s%s%s\n", debopts[cnt].len, debopts[cnt].name, |
1907 | " " + debopts[cnt].len - 3, | |
3e2040c8 | 1908 | debopts[cnt].helptext); |
14c44e2e | 1909 | |
3e2040c8 UD |
1910 | _dl_printf ("\n\ |
1911 | To direct the debugging output into a file instead of standard output\n\ | |
1912 | a filename can be specified using the LD_DEBUG_OUTPUT environment variable.\n"); | |
1913 | _exit (0); | |
b5efde2f | 1914 | } |
b5efde2f UD |
1915 | } |
1916 | \f | |
ea278354 UD |
1917 | /* Process all environments variables the dynamic linker must recognize. |
1918 | Since all of them start with `LD_' we are a bit smarter while finding | |
1919 | all the entries. */ | |
9360906d | 1920 | extern char **_environ attribute_hidden; |
67c94753 | 1921 | |
d6b5d570 | 1922 | |
ea278354 | 1923 | static void |
ba9fcb3f | 1924 | process_envvars (enum mode *modep) |
ea278354 | 1925 | { |
67c94753 | 1926 | char **runp = _environ; |
ea278354 UD |
1927 | char *envline; |
1928 | enum mode mode = normal; | |
7dea968e | 1929 | char *debug_output = NULL; |
ea278354 UD |
1930 | |
1931 | /* This is the default place for profiling data file. */ | |
e6caf4e1 UD |
1932 | GL(dl_profile_output) |
1933 | = &"/var/tmp\0/var/profile"[INTUSE(__libc_enable_secure) ? 9 : 0]; | |
ea278354 UD |
1934 | |
1935 | while ((envline = _dl_next_ld_env_entry (&runp)) != NULL) | |
1936 | { | |
379d4ec4 UD |
1937 | size_t len = 0; |
1938 | ||
1939 | while (envline[len] != '\0' && envline[len] != '=') | |
1940 | ++len; | |
ea278354 | 1941 | |
75e8d1f5 UD |
1942 | if (envline[len] != '=') |
1943 | /* This is a "LD_" variable at the end of the string without | |
1944 | a '=' character. Ignore it since otherwise we will access | |
1945 | invalid memory below. */ | |
67c94753 | 1946 | continue; |
75e8d1f5 | 1947 | |
67c94753 | 1948 | switch (len) |
ea278354 | 1949 | { |
14c44e2e UD |
1950 | case 4: |
1951 | /* Warning level, verbose or not. */ | |
67c94753 | 1952 | if (memcmp (envline, "WARN", 4) == 0) |
d6b5d570 | 1953 | GL(dl_verbose) = envline[5] != '\0'; |
14c44e2e | 1954 | break; |
ea278354 | 1955 | |
14c44e2e UD |
1956 | case 5: |
1957 | /* Debugging of the dynamic linker? */ | |
67c94753 UD |
1958 | if (memcmp (envline, "DEBUG", 5) == 0) |
1959 | process_dl_debug (&envline[6]); | |
14c44e2e | 1960 | break; |
b5efde2f | 1961 | |
14c44e2e UD |
1962 | case 7: |
1963 | /* Print information about versions. */ | |
67c94753 | 1964 | if (memcmp (envline, "VERBOSE", 7) == 0) |
14c44e2e | 1965 | { |
67c94753 | 1966 | version_info = envline[8] != '\0'; |
14c44e2e UD |
1967 | break; |
1968 | } | |
7dea968e | 1969 | |
14c44e2e | 1970 | /* List of objects to be preloaded. */ |
67c94753 | 1971 | if (memcmp (envline, "PRELOAD", 7) == 0) |
14c44e2e | 1972 | { |
67c94753 | 1973 | preloadlist = &envline[8]; |
14c44e2e UD |
1974 | break; |
1975 | } | |
120b4c49 | 1976 | |
14c44e2e | 1977 | /* Which shared object shall be profiled. */ |
c95f3fd4 | 1978 | if (memcmp (envline, "PROFILE", 7) == 0 && envline[8] != '\0') |
d6b5d570 | 1979 | GL(dl_profile) = &envline[8]; |
14c44e2e | 1980 | break; |
120b4c49 | 1981 | |
14c44e2e UD |
1982 | case 8: |
1983 | /* Do we bind early? */ | |
67c94753 | 1984 | if (memcmp (envline, "BIND_NOW", 8) == 0) |
f53c03c2 | 1985 | { |
5688da55 | 1986 | GL(dl_lazy) = envline[9] == '\0'; |
f53c03c2 UD |
1987 | break; |
1988 | } | |
67c94753 | 1989 | if (memcmp (envline, "BIND_NOT", 8) == 0) |
d6b5d570 | 1990 | GL(dl_bind_not) = envline[9] != '\0'; |
14c44e2e | 1991 | break; |
ea278354 | 1992 | |
14c44e2e UD |
1993 | case 9: |
1994 | /* Test whether we want to see the content of the auxiliary | |
1995 | array passed up from the kernel. */ | |
67c94753 | 1996 | if (memcmp (envline, "SHOW_AUXV", 9) == 0) |
14c44e2e UD |
1997 | _dl_show_auxv (); |
1998 | break; | |
ea278354 | 1999 | |
12264bd7 | 2000 | case 10: |
3081378b | 2001 | /* Mask for the important hardware capabilities. */ |
67c94753 | 2002 | if (memcmp (envline, "HWCAP_MASK", 10) == 0) |
d6b5d570 | 2003 | GL(dl_hwcap_mask) = __strtoul_internal (&envline[11], NULL, 0, 0); |
12264bd7 UD |
2004 | break; |
2005 | ||
f787edde UD |
2006 | case 11: |
2007 | /* Path where the binary is found. */ | |
e6caf4e1 | 2008 | if (!INTUSE(__libc_enable_secure) |
67c94753 | 2009 | && memcmp (envline, "ORIGIN_PATH", 11) == 0) |
d6b5d570 | 2010 | GL(dl_origin_path) = &envline[12]; |
f787edde UD |
2011 | break; |
2012 | ||
14c44e2e | 2013 | case 12: |
dec126b4 | 2014 | /* The library search path. */ |
67c94753 | 2015 | if (memcmp (envline, "LIBRARY_PATH", 12) == 0) |
dec126b4 | 2016 | { |
67c94753 | 2017 | library_path = &envline[13]; |
dec126b4 UD |
2018 | break; |
2019 | } | |
2020 | ||
14c44e2e | 2021 | /* Where to place the profiling data file. */ |
67c94753 | 2022 | if (memcmp (envline, "DEBUG_OUTPUT", 12) == 0) |
14c44e2e | 2023 | { |
67c94753 | 2024 | debug_output = &envline[13]; |
14c44e2e UD |
2025 | break; |
2026 | } | |
ea278354 | 2027 | |
67c94753 | 2028 | if (memcmp (envline, "DYNAMIC_WEAK", 12) == 0) |
5688da55 | 2029 | GL(dl_dynamic_weak) = 1; |
14c44e2e | 2030 | break; |
ea278354 | 2031 | |
97fd3a30 UD |
2032 | case 13: |
2033 | /* We might have some extra environment variable with length 13 | |
2034 | to handle. */ | |
2035 | #ifdef EXTRA_LD_ENVVARS_13 | |
2036 | EXTRA_LD_ENVVARS_13 | |
2037 | #endif | |
2038 | if (!INTUSE(__libc_enable_secure) | |
2039 | && memcmp (envline, "USE_LOAD_BIAS", 13) == 0) | |
2040 | GL(dl_use_load_bias) = envline[14] == '1' ? -1 : 0; | |
2041 | break; | |
2042 | ||
14c44e2e UD |
2043 | case 14: |
2044 | /* Where to place the profiling data file. */ | |
e6caf4e1 | 2045 | if (!INTUSE(__libc_enable_secure) |
3e2040c8 UD |
2046 | && memcmp (envline, "PROFILE_OUTPUT", 14) == 0 |
2047 | && envline[15] != '\0') | |
d6b5d570 | 2048 | GL(dl_profile_output) = &envline[15]; |
14c44e2e | 2049 | break; |
120b4c49 | 2050 | |
32e6df36 UD |
2051 | case 16: |
2052 | /* The mode of the dynamic linker can be set. */ | |
2053 | if (memcmp (envline, "TRACE_PRELINKING", 16) == 0) | |
2054 | { | |
2055 | mode = trace; | |
d6b5d570 UD |
2056 | GL(dl_verbose) = 1; |
2057 | GL(dl_debug_mask) |= DL_DEBUG_PRELINK; | |
2058 | GL(dl_trace_prelink) = &envline[17]; | |
32e6df36 UD |
2059 | } |
2060 | break; | |
2061 | ||
14c44e2e UD |
2062 | case 20: |
2063 | /* The mode of the dynamic linker can be set. */ | |
67c94753 | 2064 | if (memcmp (envline, "TRACE_LOADED_OBJECTS", 20) == 0) |
14c44e2e UD |
2065 | mode = trace; |
2066 | break; | |
e2102c14 UD |
2067 | |
2068 | /* We might have some extra environment variable to handle. This | |
2069 | is tricky due to the pre-processing of the length of the name | |
2070 | in the switch statement here. The code here assumes that added | |
2071 | environment variables have a different length. */ | |
2072 | #ifdef EXTRA_LD_ENVVARS | |
2073 | EXTRA_LD_ENVVARS | |
2074 | #endif | |
ea278354 UD |
2075 | } |
2076 | } | |
2077 | ||
3e2040c8 UD |
2078 | /* The caller wants this information. */ |
2079 | *modep = mode; | |
2080 | ||
4bae5567 UD |
2081 | /* Extra security for SUID binaries. Remove all dangerous environment |
2082 | variables. */ | |
e6caf4e1 | 2083 | if (__builtin_expect (INTUSE(__libc_enable_secure), 0)) |
4bae5567 | 2084 | { |
c95f3fd4 | 2085 | static const char unsecure_envvars[] = |
4bae5567 UD |
2086 | #ifdef EXTRA_UNSECURE_ENVVARS |
2087 | EXTRA_UNSECURE_ENVVARS | |
2088 | #endif | |
c95f3fd4 UD |
2089 | UNSECURE_ENVVARS; |
2090 | const char *nextp; | |
2091 | ||
2092 | nextp = unsecure_envvars; | |
2093 | do | |
2094 | { | |
2095 | unsetenv (nextp); | |
9710f75d UD |
2096 | /* We could use rawmemchr but this need not be fast. */ |
2097 | nextp = (char *) (strchr) (nextp, '\0') + 1; | |
c95f3fd4 UD |
2098 | } |
2099 | while (*nextp != '\0'); | |
74955460 UD |
2100 | |
2101 | if (__access ("/etc/suid-debug", F_OK) != 0) | |
2102 | unsetenv ("MALLOC_CHECK_"); | |
4bae5567 | 2103 | } |
7dea968e UD |
2104 | /* If we have to run the dynamic linker in debugging mode and the |
2105 | LD_DEBUG_OUTPUT environment variable is given, we write the debug | |
2106 | messages to this file. */ | |
3e2040c8 | 2107 | else if (any_debug && debug_output != NULL) |
7dea968e | 2108 | { |
5f2de337 UD |
2109 | #ifdef O_NOFOLLOW |
2110 | const int flags = O_WRONLY | O_APPEND | O_CREAT | O_NOFOLLOW; | |
2111 | #else | |
2112 | const int flags = O_WRONLY | O_APPEND | O_CREAT; | |
2113 | #endif | |
7a2fd787 UD |
2114 | size_t name_len = strlen (debug_output); |
2115 | char buf[name_len + 12]; | |
2116 | char *startp; | |
2117 | ||
2118 | buf[name_len + 11] = '\0'; | |
9710f75d | 2119 | startp = _itoa (__getpid (), &buf[name_len + 11], 10, 0); |
7a2fd787 UD |
2120 | *--startp = '.'; |
2121 | startp = memcpy (startp - name_len, debug_output, name_len); | |
2122 | ||
5688da55 UD |
2123 | GL(dl_debug_fd) = __open (startp, flags, DEFFILEMODE); |
2124 | if (GL(dl_debug_fd) == -1) | |
7dea968e | 2125 | /* We use standard output if opening the file failed. */ |
5688da55 | 2126 | GL(dl_debug_fd) = STDOUT_FILENO; |
7dea968e | 2127 | } |
ea278354 | 2128 | } |
db276fa1 UD |
2129 | |
2130 | ||
2131 | /* Print the various times we collected. */ | |
2132 | static void | |
392a6b52 | 2133 | print_statistics (hp_timing_t *rtld_total_timep) |
db276fa1 | 2134 | { |
8b07d6a8 | 2135 | #ifndef HP_TIMING_NONAVAIL |
f457369d | 2136 | char buf[200]; |
db276fa1 UD |
2137 | char *cp; |
2138 | char *wp; | |
2139 | ||
2140 | /* Total time rtld used. */ | |
2141 | if (HP_TIMING_AVAIL) | |
2142 | { | |
392a6b52 | 2143 | HP_TIMING_PRINT (buf, sizeof (buf), *rtld_total_timep); |
cff26a3e AJ |
2144 | INTUSE(_dl_debug_printf) ("\nruntime linker statistics:\n" |
2145 | " total startup time in dynamic loader: %s\n", | |
2146 | buf); | |
db276fa1 | 2147 | |
392a6b52 | 2148 | /* Print relocation statistics. */ |
35fc382a | 2149 | char pbuf[30]; |
db276fa1 | 2150 | HP_TIMING_PRINT (buf, sizeof (buf), relocate_time); |
392a6b52 | 2151 | cp = _itoa ((1000ULL * relocate_time) / *rtld_total_timep, |
9710f75d | 2152 | pbuf + sizeof (pbuf), 10, 0); |
35fc382a UD |
2153 | wp = pbuf; |
2154 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
2155 | { |
2156 | case 3: | |
2157 | *wp++ = *cp++; | |
2158 | case 2: | |
2159 | *wp++ = *cp++; | |
2160 | case 1: | |
2161 | *wp++ = '.'; | |
2162 | *wp++ = *cp++; | |
2163 | } | |
2164 | *wp = '\0'; | |
cff26a3e | 2165 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 2166 | time needed for relocation: %s (%s%%)\n", |
cff26a3e | 2167 | buf, pbuf); |
db276fa1 | 2168 | } |
1531e094 | 2169 | #endif |
a21a20a3 UD |
2170 | |
2171 | unsigned long int num_relative_relocations = 0; | |
2172 | struct r_scope_elem *scope = &GL(dl_loaded)->l_searchlist; | |
2173 | unsigned int i; | |
2174 | ||
2175 | for (i = 0; i < scope->r_nlist; i++) | |
2176 | { | |
2177 | struct link_map *l = scope->r_list [i]; | |
2178 | ||
2179 | if (!l->l_addr) | |
2180 | continue; | |
2181 | ||
2182 | if (l->l_info[VERSYMIDX (DT_RELCOUNT)]) | |
2183 | num_relative_relocations += l->l_info[VERSYMIDX (DT_RELCOUNT)]->d_un.d_val; | |
2184 | if (l->l_info[VERSYMIDX (DT_RELACOUNT)]) | |
2185 | num_relative_relocations += l->l_info[VERSYMIDX (DT_RELACOUNT)]->d_un.d_val; | |
2186 | } | |
2187 | ||
cff26a3e AJ |
2188 | INTUSE(_dl_debug_printf) (" number of relocations: %lu\n", |
2189 | GL(dl_num_relocations)); | |
2190 | INTUSE(_dl_debug_printf) (" number of relocations from cache: %lu\n", | |
2191 | GL(dl_num_cache_relocations)); | |
a21a20a3 UD |
2192 | INTUSE(_dl_debug_printf) (" number of relative relocations: %lu\n", |
2193 | num_relative_relocations); | |
db276fa1 | 2194 | |
1531e094 | 2195 | #ifndef HP_TIMING_NONAVAIL |
db276fa1 UD |
2196 | /* Time spend while loading the object and the dependencies. */ |
2197 | if (HP_TIMING_AVAIL) | |
2198 | { | |
35fc382a | 2199 | char pbuf[30]; |
db276fa1 | 2200 | HP_TIMING_PRINT (buf, sizeof (buf), load_time); |
392a6b52 | 2201 | cp = _itoa ((1000ULL * load_time) / *rtld_total_timep, |
9710f75d | 2202 | pbuf + sizeof (pbuf), 10, 0); |
35fc382a UD |
2203 | wp = pbuf; |
2204 | switch (pbuf + sizeof (pbuf) - cp) | |
db276fa1 UD |
2205 | { |
2206 | case 3: | |
2207 | *wp++ = *cp++; | |
2208 | case 2: | |
2209 | *wp++ = *cp++; | |
2210 | case 1: | |
2211 | *wp++ = '.'; | |
2212 | *wp++ = *cp++; | |
2213 | } | |
2214 | *wp = '\0'; | |
cff26a3e | 2215 | INTUSE(_dl_debug_printf) ("\ |
7969407a | 2216 | time needed to load objects: %s (%s%%)\n", |
cff26a3e | 2217 | buf, pbuf); |
db276fa1 | 2218 | } |
1531e094 | 2219 | #endif |
db276fa1 | 2220 | } |