2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * Private definitions for libc, libc_r and libpthread.
35 #ifndef _LIBC_PRIVATE_H_
36 #define _LIBC_PRIVATE_H_
37 #include <sys/_types.h>
38 #include <sys/_pthreadtypes.h>
41 * This global flag is non-zero when a process has created one
42 * or more threads. It is used to avoid calling locking functions
43 * when they are not required.
45 #ifndef __LIBC_ISTHREADED_DECLARED
46 #define __LIBC_ISTHREADED_DECLARED
47 extern int __isthreaded;
51 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector
52 * provided by kernel. Either set for us by rtld, or found at runtime
53 * on stack for static binaries.
55 * Type is void to avoid polluting whole libc with ELF types.
57 extern void *__elf_aux_vector;
60 * libc should use libc_dlopen internally, which respects a global
61 * flag where loading of new shared objects can be restricted.
63 void *libc_dlopen(const char *, int);
68 void _rtld_error(const char *fmt, ...);
71 * File lock contention is difficult to diagnose without knowing
72 * where locks were set. Allow a debug library to be built which
73 * records the source file and line number of each lock call.
76 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
78 #define _FLOCKFILE(x) _flockfile(x)
82 * Macros for locking and unlocking FILEs. These test if the
83 * process is threaded to avoid locking when not required.
85 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)
86 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp)
89 extern struct _spinlock __stdio_thread_lock __hidden;
90 #define STDIO_THREAD_LOCK() \
93 _SPINLOCK(&__stdio_thread_lock); \
95 #define STDIO_THREAD_UNLOCK() \
98 _SPINUNLOCK(&__stdio_thread_lock); \
101 void __libc_spinlock_stub(struct _spinlock *);
102 void __libc_spinunlock_stub(struct _spinlock *);
105 * Indexes into the pthread jump table.
107 * Warning! If you change this type, you must also change the threads
108 * libraries that reference it (libc_r, libpthread).
113 PJT_ATTR_GETDETACHSTATE,
114 PJT_ATTR_GETGUARDSIZE,
115 PJT_ATTR_GETINHERITSCHED,
116 PJT_ATTR_GETSCHEDPARAM,
117 PJT_ATTR_GETSCHEDPOLICY,
119 PJT_ATTR_GETSTACKADDR,
120 PJT_ATTR_GETSTACKSIZE,
122 PJT_ATTR_SETDETACHSTATE,
123 PJT_ATTR_SETGUARDSIZE,
124 PJT_ATTR_SETINHERITSCHED,
125 PJT_ATTR_SETSCHEDPARAM,
126 PJT_ATTR_SETSCHEDPOLICY,
128 PJT_ATTR_SETSTACKADDR,
129 PJT_ATTR_SETSTACKSIZE,
148 PJT_MUTEXATTR_DESTROY,
150 PJT_MUTEXATTR_SETTYPE,
160 PJT_RWLOCK_TRYRDLOCK,
161 PJT_RWLOCK_TRYWRLOCK,
171 PJT_CLEANUP_PUSH_IMP,
174 PJT_MUTEX_CONSISTENT,
175 PJT_MUTEXATTR_GETROBUST,
176 PJT_MUTEXATTR_SETROBUST,
180 typedef int (*pthread_func_t)(void);
181 typedef pthread_func_t pthread_func_entry_t[2];
183 extern pthread_func_entry_t __thr_jtable[];
185 void __set_error_selector(int *(*arg)(void));
186 int _pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
187 void *(calloc_cb)(__size_t, __size_t));
189 typedef int (*interpos_func_t)(void);
190 interpos_func_t *__libc_interposing_slot(int interposno);
191 extern interpos_func_t __libc_interposing[] __hidden;
196 INTERPOS_aio_suspend,
214 INTERPOS_sigprocmask,
217 INTERPOS_sigtimedwait,
218 INTERPOS_sigwaitinfo,
219 INTERPOS_swapcontext,
227 INTERPOS__pthread_mutex_init_calloc_cb,
233 INTERPOS_map_stacks_exec,
235 INTERPOS_clock_nanosleep,
240 * yplib internal interfaces
243 int _yp_check(char **);
247 * Initialise TLS for static programs
249 void _init_tls(void);
252 * Provides pthread_once()-like functionality for both single-threaded
253 * and multi-threaded applications.
255 int _once(pthread_once_t *, void (*)(void));
258 * Set the TLS thread pointer
260 void _set_tp(void *tp);
263 * This is a pointer in the C run-time startup code. It is used
264 * by getprogname() and setprogname().
266 extern const char *__progname;
269 * This function is used by the threading libraries to notify malloc that a
272 void _malloc_thread_cleanup(void);
275 * This function is used by the threading libraries to notify libc that a
276 * thread is exiting, so its thread-local dtors should be called.
278 void __cxa_thread_call_dtors(void);
279 int __cxa_thread_atexit_hidden(void (*dtor_func)(void *), void *obj,
280 void *dso_symbol) __hidden;
283 * These functions are used by the threading libraries in order to protect
284 * malloc across fork().
286 void _malloc_prefork(void);
287 void _malloc_postfork(void);
289 void _malloc_first_thread(void);
292 * Function to clean up streams, called from abort() and exit().
294 extern void (*__cleanup)(void) __hidden;
297 * Get kern.osreldate to detect ABI revisions. Explicitly
298 * ignores value of $OSVERSION and caches result.
300 int __getosreldate(void);
301 #include <sys/_types.h>
302 #include <sys/_sigset.h>
321 int __sys_aio_suspend(const struct aiocb * const[], int,
322 const struct timespec *);
323 int __sys_accept(int, struct sockaddr *, __socklen_t *);
324 int __sys_accept4(int, struct sockaddr *, __socklen_t *, int);
325 int __sys_clock_gettime(__clockid_t, struct timespec *ts);
326 int __sys_clock_nanosleep(__clockid_t, int,
327 const struct timespec *, struct timespec *);
328 int __sys_close(int);
329 int __sys_connect(int, const struct sockaddr *, __socklen_t);
330 __ssize_t __sys_getdirentries(int, char *, __size_t, __off_t *);
331 int __sys_fcntl(int, int, ...);
332 int __sys_fdatasync(int);
333 int __sys_fstatat(int, const char *, struct stat *, int);
334 int __sys_fsync(int);
335 __pid_t __sys_fork(void);
336 int __sys_ftruncate(int, __off_t);
337 int __sys_gettimeofday(struct timeval *, struct timezone *);
338 int __sys_kevent(int, const struct kevent *, int, struct kevent *,
339 int, const struct timespec *);
340 __off_t __sys_lseek(int, __off_t, int);
341 void *__sys_mmap(void *, __size_t, int, int, int, __off_t);
342 int __sys_msync(void *, __size_t, int);
343 int __sys_nanosleep(const struct timespec *, struct timespec *);
344 int __sys_open(const char *, int, ...);
345 int __sys_openat(int, const char *, int, ...);
346 int __sys_pselect(int, struct fd_set *, struct fd_set *,
347 struct fd_set *, const struct timespec *,
349 int __sys_ptrace(int, __pid_t, char *, int);
350 int __sys_poll(struct pollfd *, unsigned, int);
351 int __sys_ppoll(struct pollfd *, unsigned, const struct timespec *,
353 __ssize_t __sys_pread(int, void *, __size_t, __off_t);
354 __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
355 __ssize_t __sys_read(int, void *, __size_t);
356 __ssize_t __sys_readv(int, const struct iovec *, int);
357 __ssize_t __sys_recv(int, void *, __size_t, int);
358 __ssize_t __sys_recvfrom(int, void *, __size_t, int, struct sockaddr *,
360 __ssize_t __sys_recvmsg(int, struct msghdr *, int);
361 int __sys_select(int, struct fd_set *, struct fd_set *,
362 struct fd_set *, struct timeval *);
363 __ssize_t __sys_sendmsg(int, const struct msghdr *, int);
364 __ssize_t __sys_sendto(int, const void *, __size_t, int,
365 const struct sockaddr *, __socklen_t);
366 int __sys_setcontext(const struct __ucontext *);
367 int __sys_sigaction(int, const struct sigaction *,
369 int __sys_sigprocmask(int, const __sigset_t *, __sigset_t *);
370 int __sys_sigsuspend(const __sigset_t *);
371 int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
372 const struct timespec *);
373 int __sys_sigwait(const __sigset_t *, int *);
374 int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
375 int __sys_swapcontext(struct __ucontext *,
376 const struct __ucontext *);
377 int __sys_thr_kill(long, int);
378 int __sys_thr_self(long *);
379 int __sys_truncate(const char *, __off_t);
380 __pid_t __sys_wait4(__pid_t, int *, int, struct rusage *);
381 __pid_t __sys_wait6(enum idtype, __id_t, int *, int,
382 struct __wrusage *, struct __siginfo *);
383 __ssize_t __sys_write(int, const void *, __size_t);
384 __ssize_t __sys_writev(int, const struct iovec *, int);
386 int __libc_sigaction(int, const struct sigaction *,
387 struct sigaction *) __hidden;
388 int __libc_sigprocmask(int, const __sigset_t *, __sigset_t *)
390 int __libc_sigsuspend(const __sigset_t *) __hidden;
391 int __libc_sigwait(const __sigset_t * __restrict,
393 int __libc_system(const char *);
394 int __libc_tcdrain(int);
395 int __fcntl_compat(int fd, int cmd, ...);
397 int __sys_futimens(int fd, const struct timespec *times) __hidden;
398 int __sys_utimensat(int fd, const char *path,
399 const struct timespec *times, int flag) __hidden;
401 /* execve() with PATH processing to implement posix_spawnp() */
402 int _execvpe(const char *, char * const *, char * const *);
404 int _elf_aux_info(int aux, void *buf, int buflen);
406 int __elf_phdr_match_addr(struct dl_phdr_info *, void *);
407 void __init_elf_aux_vector(void);
408 void __libc_map_stacks_exec(void);
410 void _pthread_cancel_enter(int);
411 void _pthread_cancel_leave(int);
413 void __throw_constraint_handler_s(const char * restrict msg, int error);
415 #endif /* _LIBC_PRIVATE_H_ */