1 /* 2 * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 * 31 * Private definitions for libc, libc_r and libpthread. 32 * 33 */ 34 35 #ifndef _LIBC_PRIVATE_H_ 36 #define _LIBC_PRIVATE_H_ 37 #include <sys/_types.h> 38 #include <sys/_pthreadtypes.h> 39 40 /* 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. 44 */ 45 extern int __isthreaded; 46 47 /* 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. 51 * 52 * Type is void to avoid polluting whole libc with ELF types. 53 */ 54 extern void *__elf_aux_vector; 55 56 /* 57 * libc should use libc_dlopen internally, which respects a global 58 * flag where loading of new shared objects can be restricted. 59 */ 60 void *libc_dlopen(const char *, int); 61 62 /* 63 * For dynamic linker. 64 */ 65 void _rtld_error(const char *fmt, ...); 66 67 /* 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. 71 */ 72 #ifdef _FLOCK_DEBUG 73 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__) 74 #else 75 #define _FLOCKFILE(x) _flockfile(x) 76 #endif 77 78 /* 79 * Macros for locking and unlocking FILEs. These test if the 80 * process is threaded to avoid locking when not required. 81 */ 82 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp) 83 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp) 84 85 struct _spinlock; 86 extern struct _spinlock __stdio_thread_lock __hidden; 87 #define STDIO_THREAD_LOCK() \ 88 do { \ 89 if (__isthreaded) \ 90 _SPINLOCK(&__stdio_thread_lock); \ 91 } while (0) 92 #define STDIO_THREAD_UNLOCK() \ 93 do { \ 94 if (__isthreaded) \ 95 _SPINUNLOCK(&__stdio_thread_lock); \ 96 } while (0) 97 98 /* 99 * Indexes into the pthread jump table. 100 * 101 * Warning! If you change this type, you must also change the threads 102 * libraries that reference it (libc_r, libpthread). 103 */ 104 typedef enum { 105 PJT_ATFORK, 106 PJT_ATTR_DESTROY, 107 PJT_ATTR_GETDETACHSTATE, 108 PJT_ATTR_GETGUARDSIZE, 109 PJT_ATTR_GETINHERITSCHED, 110 PJT_ATTR_GETSCHEDPARAM, 111 PJT_ATTR_GETSCHEDPOLICY, 112 PJT_ATTR_GETSCOPE, 113 PJT_ATTR_GETSTACKADDR, 114 PJT_ATTR_GETSTACKSIZE, 115 PJT_ATTR_INIT, 116 PJT_ATTR_SETDETACHSTATE, 117 PJT_ATTR_SETGUARDSIZE, 118 PJT_ATTR_SETINHERITSCHED, 119 PJT_ATTR_SETSCHEDPARAM, 120 PJT_ATTR_SETSCHEDPOLICY, 121 PJT_ATTR_SETSCOPE, 122 PJT_ATTR_SETSTACKADDR, 123 PJT_ATTR_SETSTACKSIZE, 124 PJT_CANCEL, 125 PJT_CLEANUP_POP, 126 PJT_CLEANUP_PUSH, 127 PJT_COND_BROADCAST, 128 PJT_COND_DESTROY, 129 PJT_COND_INIT, 130 PJT_COND_SIGNAL, 131 PJT_COND_TIMEDWAIT, 132 PJT_COND_WAIT, 133 PJT_DETACH, 134 PJT_EQUAL, 135 PJT_EXIT, 136 PJT_GETSPECIFIC, 137 PJT_JOIN, 138 PJT_KEY_CREATE, 139 PJT_KEY_DELETE, 140 PJT_KILL, 141 PJT_MAIN_NP, 142 PJT_MUTEXATTR_DESTROY, 143 PJT_MUTEXATTR_INIT, 144 PJT_MUTEXATTR_SETTYPE, 145 PJT_MUTEX_DESTROY, 146 PJT_MUTEX_INIT, 147 PJT_MUTEX_LOCK, 148 PJT_MUTEX_TRYLOCK, 149 PJT_MUTEX_UNLOCK, 150 PJT_ONCE, 151 PJT_RWLOCK_DESTROY, 152 PJT_RWLOCK_INIT, 153 PJT_RWLOCK_RDLOCK, 154 PJT_RWLOCK_TRYRDLOCK, 155 PJT_RWLOCK_TRYWRLOCK, 156 PJT_RWLOCK_UNLOCK, 157 PJT_RWLOCK_WRLOCK, 158 PJT_SELF, 159 PJT_SETCANCELSTATE, 160 PJT_SETCANCELTYPE, 161 PJT_SETSPECIFIC, 162 PJT_SIGMASK, 163 PJT_TESTCANCEL, 164 PJT_CLEANUP_POP_IMP, 165 PJT_CLEANUP_PUSH_IMP, 166 PJT_CANCEL_ENTER, 167 PJT_CANCEL_LEAVE, 168 PJT_MAX 169 } pjt_index_t; 170 171 typedef int (*pthread_func_t)(void); 172 typedef pthread_func_t pthread_func_entry_t[2]; 173 174 extern pthread_func_entry_t __thr_jtable[]; 175 176 extern int *(*__error_selector)(void); 177 int _pthread_mutex_init_calloc_cb_stub(pthread_mutex_t *mutex, 178 void *(calloc_cb)(__size_t, __size_t)); 179 180 typedef int (*interpos_func_t)(void); 181 interpos_func_t *__libc_interposing_slot(int interposno); 182 extern interpos_func_t __libc_interposing[]; 183 184 enum { 185 INTERPOS_accept, 186 INTERPOS_accept4, 187 INTERPOS_aio_suspend, 188 INTERPOS_close, 189 INTERPOS_connect, 190 INTERPOS_creat, 191 INTERPOS_fcntl, 192 INTERPOS_fsync, 193 INTERPOS_fork, 194 INTERPOS_msync, 195 INTERPOS_nanosleep, 196 INTERPOS_open, 197 INTERPOS_openat, 198 INTERPOS_poll, 199 INTERPOS_pselect, 200 INTERPOS_raise, 201 INTERPOS_recvfrom, 202 INTERPOS_recvmsg, 203 INTERPOS_select, 204 INTERPOS_sendmsg, 205 INTERPOS_sendto, 206 INTERPOS_setcontext, 207 INTERPOS_sigaction, 208 INTERPOS_sigprocmask, 209 INTERPOS_sigsuspend, 210 INTERPOS_sigwait, 211 INTERPOS_sigtimedwait, 212 INTERPOS_sigwaitinfo, 213 INTERPOS_swapcontext, 214 INTERPOS_system, 215 INTERPOS_sleep, 216 INTERPOS_tcdrain, 217 INTERPOS_usleep, 218 INTERPOS_pause, 219 INTERPOS_read, 220 INTERPOS_readv, 221 INTERPOS_wait, 222 INTERPOS_wait3, 223 INTERPOS_wait4, 224 INTERPOS_waitpid, 225 INTERPOS_write, 226 INTERPOS_writev, 227 INTERPOS__pthread_mutex_init_calloc_cb, 228 INTERPOS_MAX 229 }; 230 231 /* 232 * yplib internal interfaces 233 */ 234 #ifdef YP 235 int _yp_check(char **); 236 #endif 237 238 /* 239 * Initialise TLS for static programs 240 */ 241 void _init_tls(void); 242 243 /* 244 * Provides pthread_once()-like functionality for both single-threaded 245 * and multi-threaded applications. 246 */ 247 int _once(pthread_once_t *, void (*)(void)); 248 249 /* 250 * Set the TLS thread pointer 251 */ 252 void _set_tp(void *tp); 253 254 /* 255 * This is a pointer in the C run-time startup code. It is used 256 * by getprogname() and setprogname(). 257 */ 258 extern const char *__progname; 259 260 /* 261 * This function is used by the threading libraries to notify malloc that a 262 * thread is exiting. 263 */ 264 void _malloc_thread_cleanup(void); 265 266 /* 267 * These functions are used by the threading libraries in order to protect 268 * malloc across fork(). 269 */ 270 void _malloc_prefork(void); 271 void _malloc_postfork(void); 272 273 void _malloc_first_thread(void); 274 275 /* 276 * Function to clean up streams, called from abort() and exit(). 277 */ 278 void (*__cleanup)(void) __hidden; 279 280 /* 281 * Get kern.osreldate to detect ABI revisions. Explicitly 282 * ignores value of $OSVERSION and caches result. Prototypes 283 * for the wrapped "new" pad-less syscalls are here for now. 284 */ 285 int __getosreldate(void); 286 #include <sys/_types.h> 287 #include <sys/_sigset.h> 288 289 /* With pad */ 290 __off_t __sys_freebsd6_lseek(int, int, __off_t, int); 291 int __sys_freebsd6_ftruncate(int, int, __off_t); 292 int __sys_freebsd6_truncate(const char *, int, __off_t); 293 __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t); 294 __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t); 295 void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t); 296 297 struct aiocb; 298 struct fd_set; 299 struct iovec; 300 struct msghdr; 301 struct pollfd; 302 struct rusage; 303 struct sigaction; 304 struct sockaddr; 305 struct timespec; 306 struct timeval; 307 struct timezone; 308 struct __siginfo; 309 struct __ucontext; 310 int __sys_aio_suspend(const struct aiocb * const[], int, 311 const struct timespec *); 312 int __sys_accept(int, struct sockaddr *, __socklen_t *); 313 int __sys_accept4(int, struct sockaddr *, __socklen_t *, int); 314 int __sys_clock_gettime(__clockid_t, struct timespec *ts); 315 int __sys_close(int); 316 int __sys_connect(int, const struct sockaddr *, __socklen_t); 317 int __sys_fcntl(int, int, ...); 318 int __sys_fsync(int); 319 __pid_t __sys_fork(void); 320 int __sys_ftruncate(int, __off_t); 321 int __sys_gettimeofday(struct timeval *, struct timezone *); 322 __off_t __sys_lseek(int, __off_t, int); 323 void *__sys_mmap(void *, __size_t, int, int, int, __off_t); 324 int __sys_msync(void *, __size_t, int); 325 int __sys_nanosleep(const struct timespec *, struct timespec *); 326 int __sys_open(const char *, int, ...); 327 int __sys_openat(int, const char *, int, ...); 328 int __sys_pselect(int, struct fd_set *, struct fd_set *, 329 struct fd_set *, const struct timespec *, 330 const __sigset_t *); 331 int __sys_poll(struct pollfd *, unsigned, int); 332 __ssize_t __sys_pread(int, void *, __size_t, __off_t); 333 __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t); 334 __ssize_t __sys_read(int, void *, __size_t); 335 __ssize_t __sys_readv(int, const struct iovec *, int); 336 __ssize_t __sys_recv(int, void *, __size_t, int); 337 __ssize_t __sys_recvfrom(int, void *, __size_t, int, struct sockaddr *, 338 __socklen_t *); 339 __ssize_t __sys_recvmsg(int, struct msghdr *, int); 340 int __sys_select(int, struct fd_set *, struct fd_set *, 341 struct fd_set *, struct timeval *); 342 __ssize_t __sys_sendmsg(int, const struct msghdr *, int); 343 __ssize_t __sys_sendto(int, const void *, __size_t, int, 344 const struct sockaddr *, __socklen_t); 345 int __sys_setcontext(const struct __ucontext *); 346 int __sys_sigaction(int, const struct sigaction *, 347 struct sigaction *); 348 int __sys_sigprocmask(int, const __sigset_t *, __sigset_t *); 349 int __sys_sigsuspend(const __sigset_t *); 350 int __sys_sigtimedwait(const __sigset_t *, struct __siginfo *, 351 const struct timespec *); 352 int __sys_sigwait(const __sigset_t *, int *); 353 int __sys_sigwaitinfo(const __sigset_t *, struct __siginfo *); 354 int __sys_swapcontext(struct __ucontext *, 355 const struct __ucontext *); 356 int __sys_truncate(const char *, __off_t); 357 __pid_t __sys_wait4(__pid_t, int *, int, struct rusage *); 358 __ssize_t __sys_write(int, const void *, __size_t); 359 __ssize_t __sys_writev(int, const struct iovec *, int); 360 361 int __libc_creat(const char *path, __mode_t mode); 362 int __libc_pause(void); 363 int __libc_raise(int); 364 int __libc_sigwait(const __sigset_t * __restrict, 365 int * restrict sig); 366 int __libc_system(const char *); 367 unsigned int __libc_sleep(unsigned int); 368 int __libc_tcdrain(int); 369 int __libc_usleep(__useconds_t); 370 __pid_t __libc_wait(int *); 371 __pid_t __libc_wait3(int *, int, struct rusage *); 372 __pid_t __libc_waitpid(__pid_t, int *, int); 373 int __fcntl_compat(int fd, int cmd, ...); 374 375 /* execve() with PATH processing to implement posix_spawnp() */ 376 int _execvpe(const char *, char * const *, char * const *); 377 378 int _elf_aux_info(int aux, void *buf, int buflen); 379 struct dl_phdr_info; 380 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 381 void __init_elf_aux_vector(void); 382 383 void _pthread_cancel_enter(int); 384 void _pthread_cancel_leave(int); 385 386 #endif /* _LIBC_PRIVATE_H_ */ 387