2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the author nor the names of any co-contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * Private definitions for libc, libc_r and libpthread.
37 #ifndef _LIBC_PRIVATE_H_
38 #define _LIBC_PRIVATE_H_
39 #include <sys/_types.h>
40 #include <sys/_pthreadtypes.h>
43 * This global flag is non-zero when a process has created one
44 * or more threads. It is used to avoid calling locking functions
45 * when they are not required.
47 #ifndef __LIBC_ISTHREADED_DECLARED
48 #define __LIBC_ISTHREADED_DECLARED
49 extern int __isthreaded;
53 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector
54 * provided by kernel. Either set for us by rtld, or found at runtime
55 * on stack for static binaries.
57 * Type is void to avoid polluting whole libc with ELF types.
59 extern void *__elf_aux_vector;
62 * libc should use libc_dlopen internally, which respects a global
63 * flag where loading of new shared objects can be restricted.
65 void *libc_dlopen(const char *, int);
70 void _rtld_error(const char *fmt, ...);
73 * File lock contention is difficult to diagnose without knowing
74 * where locks were set. Allow a debug library to be built which
75 * records the source file and line number of each lock call.
78 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
80 #define _FLOCKFILE(x) _flockfile(x)
84 * Macros for locking and unlocking FILEs. These test if the
85 * process is threaded to avoid locking when not required.
87 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)
88 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp)
91 extern struct _spinlock __stdio_thread_lock __hidden;
92 #define STDIO_THREAD_LOCK() \
95 _SPINLOCK(&__stdio_thread_lock); \
97 #define STDIO_THREAD_UNLOCK() \
100 _SPINUNLOCK(&__stdio_thread_lock); \
103 void __libc_spinlock_stub(struct _spinlock *);
104 void __libc_spinunlock_stub(struct _spinlock *);
107 * Indexes into the pthread jump table.
109 * Warning! If you change this type, you must also change the threads
110 * libraries that reference it (libc_r, libpthread).
115 PJT_ATTR_GETDETACHSTATE,
116 PJT_ATTR_GETGUARDSIZE,
117 PJT_ATTR_GETINHERITSCHED,
118 PJT_ATTR_GETSCHEDPARAM,
119 PJT_ATTR_GETSCHEDPOLICY,
121 PJT_ATTR_GETSTACKADDR,
122 PJT_ATTR_GETSTACKSIZE,
124 PJT_ATTR_SETDETACHSTATE,
125 PJT_ATTR_SETGUARDSIZE,
126 PJT_ATTR_SETINHERITSCHED,
127 PJT_ATTR_SETSCHEDPARAM,
128 PJT_ATTR_SETSCHEDPOLICY,
130 PJT_ATTR_SETSTACKADDR,
131 PJT_ATTR_SETSTACKSIZE,
150 PJT_MUTEXATTR_DESTROY,
152 PJT_MUTEXATTR_SETTYPE,
162 PJT_RWLOCK_TRYRDLOCK,
163 PJT_RWLOCK_TRYWRLOCK,
173 PJT_CLEANUP_PUSH_IMP,
176 PJT_MUTEX_CONSISTENT,
177 PJT_MUTEXATTR_GETROBUST,
178 PJT_MUTEXATTR_SETROBUST,
182 typedef int (*pthread_func_t)(void);
183 typedef pthread_func_t pthread_func_entry_t[2];
185 extern pthread_func_entry_t __thr_jtable[];
187 void __set_error_selector(int *(*arg)(void));
188 int _pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
189 void *(calloc_cb)(__size_t, __size_t));
191 typedef int (*interpos_func_t)(void);
192 interpos_func_t *__libc_interposing_slot(int interposno);
193 extern interpos_func_t __libc_interposing[] __hidden;
198 INTERPOS_aio_suspend,
216 INTERPOS_sigprocmask,
219 INTERPOS_sigtimedwait,
220 INTERPOS_sigwaitinfo,
221 INTERPOS_swapcontext,
229 INTERPOS__pthread_mutex_init_calloc_cb,
235 INTERPOS_map_stacks_exec,
237 INTERPOS_clock_nanosleep,
238 INTERPOS_distribute_static_tls,
243 * yplib internal interfaces
246 int _yp_check(char **);
250 * Initialise TLS for static programs
252 void _init_tls(void);
255 * Provides pthread_once()-like functionality for both single-threaded
256 * and multi-threaded applications.
258 int _once(pthread_once_t *, void (*)(void));
261 * Set the TLS thread pointer
263 void _set_tp(void *tp);
266 * This is a pointer in the C run-time startup code. It is used
267 * by getprogname() and setprogname().
269 extern const char *__progname;
272 * This function is used by the threading libraries to notify malloc that a
275 void _malloc_thread_cleanup(void);
278 * This function is used by the threading libraries to notify libc that a
279 * thread is exiting, so its thread-local dtors should be called.
281 void __cxa_thread_call_dtors(void);
282 int __cxa_thread_atexit_hidden(void (*dtor_func)(void *), void *obj,
283 void *dso_symbol) __hidden;
286 * These functions are used by the threading libraries in order to protect
287 * malloc across fork().
289 void _malloc_prefork(void);
290 void _malloc_postfork(void);
292 void _malloc_first_thread(void);
295 * Function to clean up streams, called from abort() and exit().
297 extern void (*__cleanup)(void) __hidden;
300 * Get kern.osreldate to detect ABI revisions. Explicitly
301 * ignores value of $OSVERSION and caches result.
303 int __getosreldate(void);
304 #include <sys/_types.h>
305 #include <sys/_sigset.h>
325 int __sys_aio_suspend(const struct aiocb * const[], int,
326 const struct timespec *);
327 int __sys_accept(int, struct sockaddr *, __socklen_t *);
328 int __sys_accept4(int, struct sockaddr *, __socklen_t *, int);
329 int __sys_clock_gettime(__clockid_t, struct timespec *ts);
330 int __sys_clock_nanosleep(__clockid_t, int,
331 const struct timespec *, struct timespec *);
332 int __sys_close(int);
333 int __sys_connect(int, const struct sockaddr *, __socklen_t);
334 int __sys_fcntl(int, int, ...);
335 int __sys_fdatasync(int);
336 int __sys_fstat(int fd, struct stat *);
337 int __sys_fstatfs(int fd, struct statfs *);
338 int __sys_fstatat(int, const char *, struct stat *, int);
339 int __sys_fsync(int);
340 __pid_t __sys_fork(void);
341 int __sys_ftruncate(int, __off_t);
342 __ssize_t __sys_getdirentries(int, char *, __size_t, __off_t *);
343 int __sys_getfsstat(struct statfs *, long, int);
344 int __sys_gettimeofday(struct timeval *, struct timezone *);
345 int __sys_kevent(int, const struct kevent *, int, struct kevent *,
346 int, const struct timespec *);
347 __off_t __sys_lseek(int, __off_t, int);
348 void *__sys_mmap(void *, __size_t, int, int, int, __off_t);
349 int __sys_msync(void *, __size_t, int);
350 int __sys_nanosleep(const struct timespec *, struct timespec *);
351 int __sys_open(const char *, int, ...);
352 int __sys_openat(int, const char *, int, ...);
353 int __sys_pselect(int, struct fd_set *, struct fd_set *,
354 struct fd_set *, const struct timespec *,
356 int __sys_ptrace(int, __pid_t, char *, int);
357 int __sys_poll(struct pollfd *, unsigned, int);
358 int __sys_ppoll(struct pollfd *, unsigned, const struct timespec *,
360 __ssize_t __sys_pread(int, void *, __size_t, __off_t);
361 __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
362 __ssize_t __sys_read(int, void *, __size_t);
363 __ssize_t __sys_readv(int, const struct iovec *, int);
364 __ssize_t __sys_recv(int, void *, __size_t, int);
365 __ssize_t __sys_recvfrom(int, void *, __size_t, int, struct sockaddr *,
367 __ssize_t __sys_recvmsg(int, struct msghdr *, int);
368 int __sys_select(int, struct fd_set *, struct fd_set *,
369 struct fd_set *, struct timeval *);
370 __ssize_t __sys_sendmsg(int, const struct msghdr *, int);
371 __ssize_t __sys_sendto(int, const void *, __size_t, int,
372 const struct sockaddr *, __socklen_t);
373 int __sys_setcontext(const struct __ucontext *);
374 int __sys_sigaction(int, const struct sigaction *,
376 int __sys_sigprocmask(int, const __sigset_t *, __sigset_t *);
377 int __sys_sigsuspend(const __sigset_t *);
378 int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
379 const struct timespec *);
380 int __sys_sigwait(const __sigset_t *, int *);
381 int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
382 int __sys_statfs(const char *, struct statfs *);
383 int __sys_swapcontext(struct __ucontext *,
384 const struct __ucontext *);
385 int __sys_thr_kill(long, int);
386 int __sys_thr_self(long *);
387 int __sys_truncate(const char *, __off_t);
388 __pid_t __sys_wait4(__pid_t, int *, int, struct rusage *);
389 __pid_t __sys_wait6(enum idtype, __id_t, int *, int,
390 struct __wrusage *, struct __siginfo *);
391 __ssize_t __sys_write(int, const void *, __size_t);
392 __ssize_t __sys_writev(int, const struct iovec *, int);
394 int __libc_sigaction(int, const struct sigaction *,
395 struct sigaction *) __hidden;
396 int __libc_sigprocmask(int, const __sigset_t *, __sigset_t *)
398 int __libc_sigsuspend(const __sigset_t *) __hidden;
399 int __libc_sigwait(const __sigset_t * __restrict,
401 int __libc_system(const char *);
402 int __libc_tcdrain(int);
403 int __fcntl_compat(int fd, int cmd, ...);
405 int __sys_futimens(int fd, const struct timespec *times) __hidden;
406 int __sys_utimensat(int fd, const char *path,
407 const struct timespec *times, int flag) __hidden;
409 /* execve() with PATH processing to implement posix_spawnp() */
410 int _execvpe(const char *, char * const *, char * const *);
412 int _elf_aux_info(int aux, void *buf, int buflen);
414 int __elf_phdr_match_addr(struct dl_phdr_info *, void *);
415 void __init_elf_aux_vector(void);
416 void __libc_map_stacks_exec(void);
417 void __libc_distribute_static_tls(__size_t, void *, __size_t, __size_t);
418 __uintptr_t __libc_static_tls_base(__size_t);
420 void _pthread_cancel_enter(int);
421 void _pthread_cancel_leave(int);
423 struct _pthread_cleanup_info;
424 void ___pthread_cleanup_push_imp(void (*)(void *), void *,
425 struct _pthread_cleanup_info *);
426 void ___pthread_cleanup_pop_imp(int);
428 void __throw_constraint_handler_s(const char * restrict msg, int error);
430 #endif /* _LIBC_PRIVATE_H_ */