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 extern int __isthreaded;
48 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector
49 * provided by kernel. Either set for us by rtld, or found at runtime
50 * on stack for static binaries.
52 * Type is void to avoid polluting whole libc with ELF types.
54 extern void *__elf_aux_vector;
57 * libc should use libc_dlopen internally, which respects a global
58 * flag where loading of new shared objects can be restricted.
60 void *libc_dlopen(const char *, int);
65 void _rtld_error(const char *fmt, ...);
68 * File lock contention is difficult to diagnose without knowing
69 * where locks were set. Allow a debug library to be built which
70 * records the source file and line number of each lock call.
73 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__)
75 #define _FLOCKFILE(x) _flockfile(x)
79 * Macros for locking and unlocking FILEs. These test if the
80 * process is threaded to avoid locking when not required.
82 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp)
83 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp)
86 extern struct _spinlock __stdio_thread_lock __hidden;
87 #define STDIO_THREAD_LOCK() \
90 _SPINLOCK(&__stdio_thread_lock); \
92 #define STDIO_THREAD_UNLOCK() \
95 _SPINUNLOCK(&__stdio_thread_lock); \
98 void __libc_spinlock_stub(struct _spinlock *);
99 void __libc_spinunlock_stub(struct _spinlock *);
102 * Indexes into the pthread jump table.
104 * Warning! If you change this type, you must also change the threads
105 * libraries that reference it (libc_r, libpthread).
110 PJT_ATTR_GETDETACHSTATE,
111 PJT_ATTR_GETGUARDSIZE,
112 PJT_ATTR_GETINHERITSCHED,
113 PJT_ATTR_GETSCHEDPARAM,
114 PJT_ATTR_GETSCHEDPOLICY,
116 PJT_ATTR_GETSTACKADDR,
117 PJT_ATTR_GETSTACKSIZE,
119 PJT_ATTR_SETDETACHSTATE,
120 PJT_ATTR_SETGUARDSIZE,
121 PJT_ATTR_SETINHERITSCHED,
122 PJT_ATTR_SETSCHEDPARAM,
123 PJT_ATTR_SETSCHEDPOLICY,
125 PJT_ATTR_SETSTACKADDR,
126 PJT_ATTR_SETSTACKSIZE,
145 PJT_MUTEXATTR_DESTROY,
147 PJT_MUTEXATTR_SETTYPE,
157 PJT_RWLOCK_TRYRDLOCK,
158 PJT_RWLOCK_TRYWRLOCK,
168 PJT_CLEANUP_PUSH_IMP,
171 PJT_MUTEX_CONSISTENT,
172 PJT_MUTEXATTR_GETROBUST,
173 PJT_MUTEXATTR_SETROBUST,
177 typedef int (*pthread_func_t)(void);
178 typedef pthread_func_t pthread_func_entry_t[2];
180 extern pthread_func_entry_t __thr_jtable[];
182 void __set_error_selector(int *(*arg)(void));
183 int _pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex,
184 void *(calloc_cb)(__size_t, __size_t));
186 typedef int (*interpos_func_t)(void);
187 interpos_func_t *__libc_interposing_slot(int interposno);
188 extern interpos_func_t __libc_interposing[] __hidden;
193 INTERPOS_aio_suspend,
211 INTERPOS_sigprocmask,
214 INTERPOS_sigtimedwait,
215 INTERPOS_sigwaitinfo,
216 INTERPOS_swapcontext,
224 INTERPOS__pthread_mutex_init_calloc_cb,
230 INTERPOS_map_stacks_exec,
232 INTERPOS_clock_nanosleep,
237 * yplib internal interfaces
240 int _yp_check(char **);
244 * Initialise TLS for static programs
246 void _init_tls(void);
249 * Provides pthread_once()-like functionality for both single-threaded
250 * and multi-threaded applications.
252 int _once(pthread_once_t *, void (*)(void));
255 * Set the TLS thread pointer
257 void _set_tp(void *tp);
260 * This is a pointer in the C run-time startup code. It is used
261 * by getprogname() and setprogname().
263 extern const char *__progname;
266 * This function is used by the threading libraries to notify malloc that a
269 void _malloc_thread_cleanup(void);
272 * This function is used by the threading libraries to notify libc that a
273 * thread is exiting, so its thread-local dtors should be called.
275 void __cxa_thread_call_dtors(void);
276 int __cxa_thread_atexit_hidden(void (*dtor_func)(void *), void *obj,
277 void *dso_symbol) __hidden;
280 * These functions are used by the threading libraries in order to protect
281 * malloc across fork().
283 void _malloc_prefork(void);
284 void _malloc_postfork(void);
286 void _malloc_first_thread(void);
289 * Function to clean up streams, called from abort() and exit().
291 extern void (*__cleanup)(void) __hidden;
294 * Get kern.osreldate to detect ABI revisions. Explicitly
295 * ignores value of $OSVERSION and caches result.
297 int __getosreldate(void);
298 #include <sys/_types.h>
299 #include <sys/_sigset.h>
317 int __sys_aio_suspend(const struct aiocb * const[], int,
318 const struct timespec *);
319 int __sys_accept(int, struct sockaddr *, __socklen_t *);
320 int __sys_accept4(int, struct sockaddr *, __socklen_t *, int);
321 int __sys_clock_gettime(__clockid_t, struct timespec *ts);
322 int __sys_clock_nanosleep(__clockid_t, int,
323 const struct timespec *, struct timespec *);
324 int __sys_close(int);
325 int __sys_connect(int, const struct sockaddr *, __socklen_t);
326 int __sys_fcntl(int, int, ...);
327 int __sys_fdatasync(int);
328 int __sys_fsync(int);
329 __pid_t __sys_fork(void);
330 int __sys_ftruncate(int, __off_t);
331 int __sys_gettimeofday(struct timeval *, struct timezone *);
332 int __sys_kevent(int, const struct kevent *, int, struct kevent *,
333 int, const struct timespec *);
334 __off_t __sys_lseek(int, __off_t, int);
335 void *__sys_mmap(void *, __size_t, int, int, int, __off_t);
336 int __sys_msync(void *, __size_t, int);
337 int __sys_nanosleep(const struct timespec *, struct timespec *);
338 int __sys_open(const char *, int, ...);
339 int __sys_openat(int, const char *, int, ...);
340 int __sys_pselect(int, struct fd_set *, struct fd_set *,
341 struct fd_set *, const struct timespec *,
343 int __sys_ptrace(int, __pid_t, char *, int);
344 int __sys_poll(struct pollfd *, unsigned, int);
345 int __sys_ppoll(struct pollfd *, unsigned, const struct timespec *,
347 __ssize_t __sys_pread(int, void *, __size_t, __off_t);
348 __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t);
349 __ssize_t __sys_read(int, void *, __size_t);
350 __ssize_t __sys_readv(int, const struct iovec *, int);
351 __ssize_t __sys_recv(int, void *, __size_t, int);
352 __ssize_t __sys_recvfrom(int, void *, __size_t, int, struct sockaddr *,
354 __ssize_t __sys_recvmsg(int, struct msghdr *, int);
355 int __sys_select(int, struct fd_set *, struct fd_set *,
356 struct fd_set *, struct timeval *);
357 __ssize_t __sys_sendmsg(int, const struct msghdr *, int);
358 __ssize_t __sys_sendto(int, const void *, __size_t, int,
359 const struct sockaddr *, __socklen_t);
360 int __sys_setcontext(const struct __ucontext *);
361 int __sys_sigaction(int, const struct sigaction *,
363 int __sys_sigprocmask(int, const __sigset_t *, __sigset_t *);
364 int __sys_sigsuspend(const __sigset_t *);
365 int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *,
366 const struct timespec *);
367 int __sys_sigwait(const __sigset_t *, int *);
368 int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *);
369 int __sys_swapcontext(struct __ucontext *,
370 const struct __ucontext *);
371 int __sys_thr_kill(long, int);
372 int __sys_thr_self(long *);
373 int __sys_truncate(const char *, __off_t);
374 __pid_t __sys_wait4(__pid_t, int *, int, struct rusage *);
375 __pid_t __sys_wait6(enum idtype, __id_t, int *, int,
376 struct __wrusage *, struct __siginfo *);
377 __ssize_t __sys_write(int, const void *, __size_t);
378 __ssize_t __sys_writev(int, const struct iovec *, int);
380 int __libc_sigaction(int, const struct sigaction *,
381 struct sigaction *) __hidden;
382 int __libc_sigprocmask(int, const __sigset_t *, __sigset_t *)
384 int __libc_sigsuspend(const __sigset_t *) __hidden;
385 int __libc_sigwait(const __sigset_t * __restrict,
387 int __libc_system(const char *);
388 int __libc_tcdrain(int);
389 int __fcntl_compat(int fd, int cmd, ...);
391 int __sys_futimens(int fd, const struct timespec *times) __hidden;
392 int __sys_utimensat(int fd, const char *path,
393 const struct timespec *times, int flag) __hidden;
395 /* execve() with PATH processing to implement posix_spawnp() */
396 int _execvpe(const char *, char * const *, char * const *);
398 int _elf_aux_info(int aux, void *buf, int buflen);
400 int __elf_phdr_match_addr(struct dl_phdr_info *, void *);
401 void __init_elf_aux_vector(void);
402 void __libc_map_stacks_exec(void);
404 void _pthread_cancel_enter(int);
405 void _pthread_cancel_leave(int);
407 void __throw_constraint_handler_s(const char * restrict msg, int error);
409 #endif /* _LIBC_PRIVATE_H_ */