1 /* libio vtable validation.
2 Copyright (C) 2016-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
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.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
23 #include <pointer_guard.h>
24 #include <libio-macros.h>
26 /* Both _IO_str_* and _IO_new_file functions are pulled into every link (from
27 stdio initialization). */
29 /* NB: the following directives do add pragma weak for _IO_default _* and
30 _IO_wdefault_* symbols to potentially avoid link failures, since they
31 are always used when the __io_vtables is used. */
32 # pragma weak _IO_wstr_finish
33 # pragma weak _IO_wstr_overflow
34 # pragma weak _IO_wstr_pbackfail
35 # pragma weak _IO_wstr_seekoff
36 # pragma weak _IO_wstr_underflow
38 # pragma weak _IO_file_close
39 # pragma weak _IO_file_close_mmap
40 # pragma weak _IO_file_doallocate
41 # pragma weak _IO_file_finish
42 # pragma weak _IO_file_overflow
43 # pragma weak _IO_file_read
44 # pragma weak _IO_file_seek
45 # pragma weak _IO_file_seekoff_maybe_mmap
46 # pragma weak _IO_file_seekoff_mmap
47 # pragma weak _IO_file_setbuf
48 # pragma weak _IO_file_setbuf_mmap
49 # pragma weak _IO_file_setbuf_mmap
50 # pragma weak _IO_file_stat
51 # pragma weak _IO_file_sync
52 # pragma weak _IO_file_sync_mmap
53 # pragma weak _IO_file_underflow
54 # pragma weak _IO_file_underflow_maybe_mmap
55 # pragma weak _IO_file_underflow_mmap
56 # pragma weak _IO_file_xsgetn
57 # pragma weak _IO_file_xsgetn_maybe_mmap
58 # pragma weak _IO_file_xsgetn_mmap
59 # pragma weak _IO_file_xsputn
61 # pragma weak _IO_wfile_overflow
62 # pragma weak _IO_wfile_sync
63 # pragma weak _IO_wfile_underflow
64 # pragma weak _IO_wfile_underflow_maybe_mmap
65 # pragma weak _IO_wfile_underflow_mmap
66 # pragma weak _IO_wfile_doallocate
67 # pragma weak _IO_wfile_seekoff
68 # pragma weak _IO_wfile_xsputn
70 # pragma weak _IO_new_proc_close
72 # pragma weak _IO_cookie_close
73 # pragma weak _IO_cookie_read
74 # pragma weak _IO_cookie_seek
75 # pragma weak _IO_cookie_seekoff
76 # pragma weak _IO_cookie_write
78 # pragma weak _IO_mem_finish
79 # pragma weak _IO_mem_sync
81 # pragma weak _IO_wmem_finish
82 # pragma weak _IO_wmem_sync
84 # pragma weak __printf_buffer_as_file_overflow
85 # pragma weak __printf_buffer_as_file_xsputn
87 # pragma weak __wprintf_buffer_as_file_overflow
88 # pragma weak __wprintf_buffer_as_file_xsputn
91 const struct _IO_jump_t __io_vtables
[IO_VTABLES_LEN
] attribute_relro
=
97 JUMP_INIT (finish
, _IO_str_finish
),
98 JUMP_INIT (overflow
, _IO_str_overflow
),
99 JUMP_INIT (underflow
, _IO_str_underflow
),
100 JUMP_INIT (uflow
, _IO_default_uflow
),
101 JUMP_INIT (pbackfail
, _IO_str_pbackfail
),
102 JUMP_INIT (xsputn
, _IO_default_xsputn
),
103 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
104 JUMP_INIT (seekoff
, _IO_str_seekoff
),
105 JUMP_INIT (seekpos
, _IO_default_seekpos
),
106 JUMP_INIT (setbuf
, _IO_default_setbuf
),
107 JUMP_INIT (sync
, _IO_default_sync
),
108 JUMP_INIT (doallocate
, _IO_default_doallocate
),
109 JUMP_INIT (read
, _IO_default_read
),
110 JUMP_INIT (write
, _IO_default_write
),
111 JUMP_INIT (seek
, _IO_default_seek
),
112 JUMP_INIT (close
, _IO_default_close
),
113 JUMP_INIT (stat
, _IO_default_stat
),
114 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
115 JUMP_INIT (imbue
, _IO_default_imbue
)
120 JUMP_INIT (finish
, _IO_wstr_finish
),
121 JUMP_INIT (overflow
, (_IO_overflow_t
) _IO_wstr_overflow
),
122 JUMP_INIT (underflow
, (_IO_underflow_t
) _IO_wstr_underflow
),
123 JUMP_INIT (uflow
, (_IO_underflow_t
) _IO_wdefault_uflow
),
124 JUMP_INIT (pbackfail
, (_IO_pbackfail_t
) _IO_wstr_pbackfail
),
125 JUMP_INIT (xsputn
, _IO_wdefault_xsputn
),
126 JUMP_INIT (xsgetn
, _IO_wdefault_xsgetn
),
127 JUMP_INIT (seekoff
, _IO_wstr_seekoff
),
128 JUMP_INIT (seekpos
, _IO_default_seekpos
),
129 JUMP_INIT (setbuf
, _IO_default_setbuf
),
130 JUMP_INIT (sync
, _IO_default_sync
),
131 JUMP_INIT (doallocate
, _IO_wdefault_doallocate
),
132 JUMP_INIT (read
, _IO_default_read
),
133 JUMP_INIT (write
, _IO_default_write
),
134 JUMP_INIT (seek
, _IO_default_seek
),
135 JUMP_INIT (close
, _IO_default_close
),
136 JUMP_INIT (stat
, _IO_default_stat
),
137 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
138 JUMP_INIT (imbue
, _IO_default_imbue
)
143 JUMP_INIT (finish
, _IO_file_finish
),
144 JUMP_INIT (overflow
, _IO_file_overflow
),
145 JUMP_INIT (underflow
, _IO_file_underflow
),
146 JUMP_INIT (uflow
, _IO_default_uflow
),
147 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
148 JUMP_INIT (xsputn
, _IO_file_xsputn
),
149 JUMP_INIT (xsgetn
, _IO_file_xsgetn
),
150 JUMP_INIT (seekoff
, _IO_new_file_seekoff
),
151 JUMP_INIT (seekpos
, _IO_default_seekpos
),
152 JUMP_INIT (setbuf
, _IO_new_file_setbuf
),
153 JUMP_INIT (sync
, _IO_new_file_sync
),
154 JUMP_INIT (doallocate
, _IO_file_doallocate
),
155 JUMP_INIT (read
, _IO_file_read
),
156 JUMP_INIT (write
, _IO_new_file_write
),
157 JUMP_INIT (seek
, _IO_file_seek
),
158 JUMP_INIT (close
, _IO_file_close
),
159 JUMP_INIT (stat
, _IO_file_stat
),
160 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
161 JUMP_INIT (imbue
, _IO_default_imbue
)
163 /* _IO_file_jumps_mmap */
164 [IO_FILE_JUMPS_MMAP
] = {
166 JUMP_INIT (finish
, _IO_file_finish
),
167 JUMP_INIT (overflow
, _IO_file_overflow
),
168 JUMP_INIT (underflow
, _IO_file_underflow_mmap
),
169 JUMP_INIT (uflow
, _IO_default_uflow
),
170 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
171 JUMP_INIT (xsputn
, _IO_new_file_xsputn
),
172 JUMP_INIT (xsgetn
, _IO_file_xsgetn_mmap
),
173 JUMP_INIT (seekoff
, _IO_file_seekoff_mmap
),
174 JUMP_INIT (seekpos
, _IO_default_seekpos
),
175 JUMP_INIT (setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
176 JUMP_INIT (sync
, _IO_file_sync_mmap
),
177 JUMP_INIT (doallocate
, _IO_file_doallocate
),
178 JUMP_INIT (read
, _IO_file_read
),
179 JUMP_INIT (write
, _IO_new_file_write
),
180 JUMP_INIT (seek
, _IO_file_seek
),
181 JUMP_INIT (close
, _IO_file_close_mmap
),
182 JUMP_INIT (stat
, _IO_file_stat
),
183 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
184 JUMP_INIT (imbue
, _IO_default_imbue
)
186 /* _IO_file_jumps_maybe_mmap */
187 [IO_FILE_JUMPS_MAYBE_MMAP
] = {
189 JUMP_INIT (finish
, _IO_file_finish
),
190 JUMP_INIT (overflow
, _IO_file_overflow
),
191 JUMP_INIT (underflow
, _IO_file_underflow_maybe_mmap
),
192 JUMP_INIT (uflow
, _IO_default_uflow
),
193 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
194 JUMP_INIT (xsputn
, _IO_new_file_xsputn
),
195 JUMP_INIT (xsgetn
, _IO_file_xsgetn_maybe_mmap
),
196 JUMP_INIT (seekoff
, _IO_file_seekoff_maybe_mmap
),
197 JUMP_INIT (seekpos
, _IO_default_seekpos
),
198 JUMP_INIT (setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
199 JUMP_INIT (sync
, _IO_new_file_sync
),
200 JUMP_INIT (doallocate
, _IO_file_doallocate
),
201 JUMP_INIT (read
, _IO_file_read
),
202 JUMP_INIT (write
, _IO_new_file_write
),
203 JUMP_INIT (seek
, _IO_file_seek
),
204 JUMP_INIT (close
, _IO_file_close
),
205 JUMP_INIT (stat
, _IO_file_stat
),
206 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
207 JUMP_INIT (imbue
, _IO_default_imbue
)
209 /* _IO_wfile_jumps */
212 JUMP_INIT (finish
, _IO_new_file_finish
),
213 JUMP_INIT (overflow
, (_IO_overflow_t
) _IO_wfile_overflow
),
214 JUMP_INIT (underflow
, (_IO_underflow_t
) _IO_wfile_underflow
),
215 JUMP_INIT (uflow
, (_IO_underflow_t
) _IO_wdefault_uflow
),
216 JUMP_INIT (pbackfail
, (_IO_pbackfail_t
) _IO_wdefault_pbackfail
),
217 JUMP_INIT (xsputn
, _IO_wfile_xsputn
),
218 JUMP_INIT (xsgetn
, _IO_file_xsgetn
),
219 JUMP_INIT (seekoff
, _IO_wfile_seekoff
),
220 JUMP_INIT (seekpos
, _IO_default_seekpos
),
221 JUMP_INIT (setbuf
, _IO_new_file_setbuf
),
222 JUMP_INIT (sync
, (_IO_sync_t
) _IO_wfile_sync
),
223 JUMP_INIT (doallocate
, _IO_wfile_doallocate
),
224 JUMP_INIT (read
, _IO_file_read
),
225 JUMP_INIT (write
, _IO_new_file_write
),
226 JUMP_INIT (seek
, _IO_file_seek
),
227 JUMP_INIT (close
, _IO_file_close
),
228 JUMP_INIT (stat
, _IO_file_stat
),
229 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
230 JUMP_INIT (imbue
, _IO_default_imbue
)
232 /* _IO_wfile_jumps_mmap */
233 [IO_WFILE_JUMPS_MMAP
] = {
235 JUMP_INIT (finish
, _IO_new_file_finish
),
236 JUMP_INIT (overflow
, (_IO_overflow_t
) _IO_wfile_overflow
),
237 JUMP_INIT (underflow
, (_IO_underflow_t
) _IO_wfile_underflow_mmap
),
238 JUMP_INIT (uflow
, (_IO_underflow_t
) _IO_wdefault_uflow
),
239 JUMP_INIT (pbackfail
, (_IO_pbackfail_t
) _IO_wdefault_pbackfail
),
240 JUMP_INIT (xsputn
, _IO_wfile_xsputn
),
241 JUMP_INIT (xsgetn
, _IO_file_xsgetn
),
242 JUMP_INIT (seekoff
, _IO_wfile_seekoff
),
243 JUMP_INIT (seekpos
, _IO_default_seekpos
),
244 JUMP_INIT (setbuf
, _IO_file_setbuf_mmap
),
245 JUMP_INIT (sync
, (_IO_sync_t
) _IO_wfile_sync
),
246 JUMP_INIT (doallocate
, _IO_wfile_doallocate
),
247 JUMP_INIT (read
, _IO_file_read
),
248 JUMP_INIT (write
, _IO_new_file_write
),
249 JUMP_INIT (seek
, _IO_file_seek
),
250 JUMP_INIT (close
, _IO_file_close_mmap
),
251 JUMP_INIT (stat
, _IO_file_stat
),
252 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
253 JUMP_INIT (imbue
, _IO_default_imbue
)
255 /* _IO_wfile_jumps_maybe_mmap */
256 [IO_WFILE_JUMPS_MAYBE_MMAP
] = {
258 JUMP_INIT (finish
, _IO_new_file_finish
),
259 JUMP_INIT (overflow
, (_IO_overflow_t
) _IO_wfile_overflow
),
260 JUMP_INIT (underflow
, (_IO_underflow_t
) _IO_wfile_underflow_maybe_mmap
),
261 JUMP_INIT (uflow
, (_IO_underflow_t
) _IO_wdefault_uflow
),
262 JUMP_INIT (pbackfail
, (_IO_pbackfail_t
) _IO_wdefault_pbackfail
),
263 JUMP_INIT (xsputn
, _IO_wfile_xsputn
),
264 JUMP_INIT (xsgetn
, _IO_file_xsgetn
),
265 JUMP_INIT (seekoff
, _IO_wfile_seekoff
),
266 JUMP_INIT (seekpos
, _IO_default_seekpos
),
267 JUMP_INIT (setbuf
, _IO_file_setbuf_mmap
),
268 JUMP_INIT (sync
, (_IO_sync_t
) _IO_wfile_sync
),
269 JUMP_INIT (doallocate
, _IO_wfile_doallocate
),
270 JUMP_INIT (read
, _IO_file_read
),
271 JUMP_INIT (write
, _IO_new_file_write
),
272 JUMP_INIT (seek
, _IO_file_seek
),
273 JUMP_INIT (close
, _IO_file_close
),
274 JUMP_INIT (stat
, _IO_file_stat
),
275 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
276 JUMP_INIT (imbue
, _IO_default_imbue
)
278 /* _IO_cookie_jumps */
279 [IO_COOKIE_JUMPS
] = {
281 JUMP_INIT (finish
, _IO_file_finish
),
282 JUMP_INIT (overflow
, _IO_file_overflow
),
283 JUMP_INIT (underflow
, _IO_file_underflow
),
284 JUMP_INIT (uflow
, _IO_default_uflow
),
285 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
286 JUMP_INIT (xsputn
, _IO_file_xsputn
),
287 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
288 JUMP_INIT (seekoff
, _IO_cookie_seekoff
),
289 JUMP_INIT (seekpos
, _IO_default_seekpos
),
290 JUMP_INIT (setbuf
, _IO_file_setbuf
),
291 JUMP_INIT (sync
, _IO_file_sync
),
292 JUMP_INIT (doallocate
, _IO_file_doallocate
),
293 JUMP_INIT (read
, _IO_cookie_read
),
294 JUMP_INIT (write
, _IO_cookie_write
),
295 JUMP_INIT (seek
, _IO_cookie_seek
),
296 JUMP_INIT (close
, _IO_cookie_close
),
297 JUMP_INIT (stat
, _IO_default_stat
),
298 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
299 JUMP_INIT (imbue
, _IO_default_imbue
),
304 JUMP_INIT (finish
, _IO_new_file_finish
),
305 JUMP_INIT (overflow
, _IO_new_file_overflow
),
306 JUMP_INIT (underflow
, _IO_new_file_underflow
),
307 JUMP_INIT (uflow
, _IO_default_uflow
),
308 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
309 JUMP_INIT (xsputn
, _IO_new_file_xsputn
),
310 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
311 JUMP_INIT (seekoff
, _IO_new_file_seekoff
),
312 JUMP_INIT (seekpos
, _IO_default_seekpos
),
313 JUMP_INIT (setbuf
, _IO_new_file_setbuf
),
314 JUMP_INIT (sync
, _IO_new_file_sync
),
315 JUMP_INIT (doallocate
, _IO_file_doallocate
),
316 JUMP_INIT (read
, _IO_file_read
),
317 JUMP_INIT (write
, _IO_new_file_write
),
318 JUMP_INIT (seek
, _IO_file_seek
),
319 JUMP_INIT (close
, _IO_new_proc_close
),
320 JUMP_INIT (stat
, _IO_file_stat
),
321 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
322 JUMP_INIT (imbue
, _IO_default_imbue
)
327 JUMP_INIT (finish
, _IO_mem_finish
),
328 JUMP_INIT (overflow
, _IO_str_overflow
),
329 JUMP_INIT (underflow
, _IO_str_underflow
),
330 JUMP_INIT (uflow
, _IO_default_uflow
),
331 JUMP_INIT (pbackfail
, _IO_str_pbackfail
),
332 JUMP_INIT (xsputn
, _IO_default_xsputn
),
333 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
334 JUMP_INIT (seekoff
, _IO_str_seekoff
),
335 JUMP_INIT (seekpos
, _IO_default_seekpos
),
336 JUMP_INIT (setbuf
, _IO_default_setbuf
),
337 JUMP_INIT (sync
, _IO_mem_sync
),
338 JUMP_INIT (doallocate
, _IO_default_doallocate
),
339 JUMP_INIT (read
, _IO_default_read
),
340 JUMP_INIT (write
, _IO_default_write
),
341 JUMP_INIT (seek
, _IO_default_seek
),
342 JUMP_INIT (close
, _IO_default_close
),
343 JUMP_INIT (stat
, _IO_default_stat
),
344 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
345 JUMP_INIT (imbue
, _IO_default_imbue
)
350 JUMP_INIT (finish
, _IO_wmem_finish
),
351 JUMP_INIT (overflow
, (_IO_overflow_t
) _IO_wstr_overflow
),
352 JUMP_INIT (underflow
, (_IO_underflow_t
) _IO_wstr_underflow
),
353 JUMP_INIT (uflow
, (_IO_underflow_t
) _IO_wdefault_uflow
),
354 JUMP_INIT (pbackfail
, (_IO_pbackfail_t
) _IO_wstr_pbackfail
),
355 JUMP_INIT (xsputn
, _IO_wdefault_xsputn
),
356 JUMP_INIT (xsgetn
, _IO_wdefault_xsgetn
),
357 JUMP_INIT (seekoff
, _IO_wstr_seekoff
),
358 JUMP_INIT (seekpos
, _IO_default_seekpos
),
359 JUMP_INIT (setbuf
, _IO_default_setbuf
),
360 JUMP_INIT (sync
, _IO_wmem_sync
),
361 JUMP_INIT (doallocate
, _IO_wdefault_doallocate
),
362 JUMP_INIT (read
, _IO_default_read
),
363 JUMP_INIT (write
, _IO_default_write
),
364 JUMP_INIT (seek
, _IO_default_seek
),
365 JUMP_INIT (close
, _IO_default_close
),
366 JUMP_INIT (stat
, _IO_default_stat
),
367 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
368 JUMP_INIT (imbue
, _IO_default_imbue
)
370 [IO_PRINTF_BUFFER_AS_FILE_JUMPS
] = {
372 JUMP_INIT (finish
, NULL
),
373 JUMP_INIT (overflow
, __printf_buffer_as_file_overflow
),
374 JUMP_INIT (underflow
, NULL
),
375 JUMP_INIT (uflow
, NULL
),
376 JUMP_INIT (pbackfail
, NULL
),
377 JUMP_INIT (xsputn
, __printf_buffer_as_file_xsputn
),
378 JUMP_INIT (xsgetn
, NULL
),
379 JUMP_INIT (seekoff
, NULL
),
380 JUMP_INIT (seekpos
, NULL
),
381 JUMP_INIT (setbuf
, NULL
),
382 JUMP_INIT (sync
, NULL
),
383 JUMP_INIT (doallocate
, NULL
),
384 JUMP_INIT (read
, NULL
),
385 JUMP_INIT (write
, NULL
),
386 JUMP_INIT (seek
, NULL
),
387 JUMP_INIT (close
, NULL
),
388 JUMP_INIT (stat
, NULL
),
389 JUMP_INIT (showmanyc
, NULL
),
390 JUMP_INIT (imbue
, NULL
)
392 [IO_WPRINTF_BUFFER_AS_FILE_JUMPS
] = {
394 JUMP_INIT (finish
, NULL
),
395 JUMP_INIT (overflow
, (_IO_overflow_t
) __wprintf_buffer_as_file_overflow
),
396 JUMP_INIT (underflow
, NULL
),
397 JUMP_INIT (uflow
, NULL
),
398 JUMP_INIT (pbackfail
, NULL
),
399 JUMP_INIT (xsputn
, __wprintf_buffer_as_file_xsputn
),
400 JUMP_INIT (xsgetn
, NULL
),
401 JUMP_INIT (seekoff
, NULL
),
402 JUMP_INIT (seekpos
, NULL
),
403 JUMP_INIT (setbuf
, NULL
),
404 JUMP_INIT (sync
, NULL
),
405 JUMP_INIT (doallocate
, NULL
),
406 JUMP_INIT (read
, NULL
),
407 JUMP_INIT (write
, NULL
),
408 JUMP_INIT (seek
, NULL
),
409 JUMP_INIT (close
, NULL
),
410 JUMP_INIT (stat
, NULL
),
411 JUMP_INIT (showmanyc
, NULL
),
412 JUMP_INIT (imbue
, NULL
)
415 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
416 /* _IO_old_file_jumps */
417 [IO_OLD_FILE_JUMPS
] = {
419 JUMP_INIT (finish
, _IO_old_file_finish
),
420 JUMP_INIT (overflow
, _IO_old_file_overflow
),
421 JUMP_INIT (underflow
, _IO_old_file_underflow
),
422 JUMP_INIT (uflow
, _IO_default_uflow
),
423 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
424 JUMP_INIT (xsputn
, _IO_old_file_xsputn
),
425 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
426 JUMP_INIT (seekoff
, _IO_old_file_seekoff
),
427 JUMP_INIT (seekpos
, _IO_default_seekpos
),
428 JUMP_INIT (setbuf
, _IO_old_file_setbuf
),
429 JUMP_INIT (sync
, _IO_old_file_sync
),
430 JUMP_INIT (doallocate
, _IO_file_doallocate
),
431 JUMP_INIT (read
, _IO_file_read
),
432 JUMP_INIT (write
, _IO_old_file_write
),
433 JUMP_INIT (seek
, _IO_file_seek
),
434 JUMP_INIT (close
, _IO_file_close
),
435 JUMP_INIT (stat
, _IO_file_stat
)
437 /* _IO_old_proc_jumps */
438 [IO_OLD_PROC_JUMPS
] = {
440 JUMP_INIT (finish
, _IO_old_file_finish
),
441 JUMP_INIT (overflow
, _IO_old_file_overflow
),
442 JUMP_INIT (underflow
, _IO_old_file_underflow
),
443 JUMP_INIT (uflow
, _IO_default_uflow
),
444 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
445 JUMP_INIT (xsputn
, _IO_old_file_xsputn
),
446 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
447 JUMP_INIT (seekoff
, _IO_old_file_seekoff
),
448 JUMP_INIT (seekpos
, _IO_default_seekpos
),
449 JUMP_INIT (setbuf
, _IO_old_file_setbuf
),
450 JUMP_INIT (sync
, _IO_old_file_sync
),
451 JUMP_INIT (doallocate
, _IO_file_doallocate
),
452 JUMP_INIT (read
, _IO_file_read
),
453 JUMP_INIT (write
, _IO_old_file_write
),
454 JUMP_INIT (seek
, _IO_file_seek
),
455 JUMP_INIT (close
, _IO_old_proc_close
),
456 JUMP_INIT (stat
, _IO_file_stat
),
457 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
458 JUMP_INIT (imbue
, _IO_default_imbue
)
462 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
463 /* _IO_old_cookie_jumps */
464 [IO_OLD_COOKIED_JUMPS
] = {
466 JUMP_INIT (finish
, _IO_file_finish
),
467 JUMP_INIT (overflow
, _IO_file_overflow
),
468 JUMP_INIT (underflow
, _IO_file_underflow
),
469 JUMP_INIT (uflow
, _IO_default_uflow
),
470 JUMP_INIT (pbackfail
, _IO_default_pbackfail
),
471 JUMP_INIT (xsputn
, _IO_file_xsputn
),
472 JUMP_INIT (xsgetn
, _IO_default_xsgetn
),
473 JUMP_INIT (seekoff
, _IO_cookie_seekoff
),
474 JUMP_INIT (seekpos
, _IO_default_seekpos
),
475 JUMP_INIT (setbuf
, _IO_file_setbuf
),
476 JUMP_INIT (sync
, _IO_file_sync
),
477 JUMP_INIT (doallocate
, _IO_file_doallocate
),
478 JUMP_INIT (read
, _IO_cookie_read
),
479 JUMP_INIT (write
, _IO_cookie_write
),
480 JUMP_INIT (seek
, _IO_old_cookie_seek
),
481 JUMP_INIT (close
, _IO_cookie_close
),
482 JUMP_INIT (stat
, _IO_default_stat
),
483 JUMP_INIT (showmanyc
, _IO_default_showmanyc
),
484 JUMP_INIT (imbue
, _IO_default_imbue
),
491 void (*IO_accept_foreign_vtables
) (void) attribute_hidden
;
495 /* Used to check whether static dlopen support is needed. */
496 # pragma weak __dlopen
500 void attribute_hidden
501 _IO_vtable_check (void)
504 /* Honor the compatibility flag. */
505 void (*flag
) (void) = atomic_load_relaxed (&IO_accept_foreign_vtables
);
507 if (flag
== &_IO_vtable_check
)
510 /* In case this libc copy is in a non-default namespace, we always
511 need to accept foreign vtables because there is always a
512 possibility that FILE * objects are passed across the linking
518 || (_dl_addr (_IO_vtable_check
, &di
, &l
, NULL
) != 0
519 && l
->l_ns
!= LM_ID_BASE
))
524 /* We cannot perform vtable validation in the static dlopen case
525 because FILE * handles might be passed back and forth across the
526 boundary. Therefore, we disable checking in this case. */
527 if (__dlopen
!= NULL
)
531 __libc_fatal ("Fatal error: glibc detected an invalid stdio handle\n");
534 /* Some variants of libstdc++ interpose _IO_2_1_stdin_ etc. and
535 install their own vtables directly, without calling _IO_init or
536 other functions. Detect this by looking at the vtables values
537 during startup, and disable vtable validation in this case. */
539 __attribute__ ((constructor
))
541 check_stdfiles_vtables (void)
543 if (_IO_2_1_stdin_
.vtable
!= &_IO_file_jumps
544 || _IO_2_1_stdout_
.vtable
!= &_IO_file_jumps
545 || _IO_2_1_stderr_
.vtable
!= &_IO_file_jumps
)
546 IO_set_accept_foreign_vtables (&_IO_vtable_check
);
550 #define STR(s) XSTR(s)
553 #undef _IO_file_jumps
554 #define _IO_file_jumps_alias "__io_vtables + " STR(IO_FILE_JUMPS_OFFSET)
555 declare_object_symbol_alias (_IO_file_jumps
, _IO_file_jumps_alias
,
557 #undef _IO_wfile_jumps
558 #define _IO_wfile_jumps_alias "__io_vtables + " STR(IO_WFILE_JUMPS_OFFSET)
559 declare_object_symbol_alias (_IO_wfile_jumps
, _IO_wfile_jumps_alias
,