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/_pthreadtypes.h> 38 39 /* 40 * This global flag is non-zero when a process has created one 41 * or more threads. It is used to avoid calling locking functions 42 * when they are not required. 43 */ 44 extern int __isthreaded; 45 46 /* 47 * Elf_Auxinfo *__elf_aux_vector, the pointer to the ELF aux vector 48 * provided by kernel. Either set for us by rtld, or found at runtime 49 * on stack for static binaries. 50 * 51 * Type is void to avoid polluting whole libc with ELF types. 52 */ 53 extern void *__elf_aux_vector; 54 55 /* 56 * libc should use libc_dlopen internally, which respects a global 57 * flag where loading of new shared objects can be restricted. 58 */ 59 void *libc_dlopen(const char *, int); 60 61 /* 62 * For dynamic linker. 63 */ 64 void _rtld_error(const char *fmt, ...); 65 66 /* 67 * File lock contention is difficult to diagnose without knowing 68 * where locks were set. Allow a debug library to be built which 69 * records the source file and line number of each lock call. 70 */ 71 #ifdef _FLOCK_DEBUG 72 #define _FLOCKFILE(x) _flockfile_debug(x, __FILE__, __LINE__) 73 #else 74 #define _FLOCKFILE(x) _flockfile(x) 75 #endif 76 77 /* 78 * Macros for locking and unlocking FILEs. These test if the 79 * process is threaded to avoid locking when not required. 80 */ 81 #define FLOCKFILE(fp) if (__isthreaded) _FLOCKFILE(fp) 82 #define FUNLOCKFILE(fp) if (__isthreaded) _funlockfile(fp) 83 84 /* 85 * Indexes into the pthread jump table. 86 * 87 * Warning! If you change this type, you must also change the threads 88 * libraries that reference it (libc_r, libpthread). 89 */ 90 typedef enum { 91 PJT_ATFORK, 92 PJT_ATTR_DESTROY, 93 PJT_ATTR_GETDETACHSTATE, 94 PJT_ATTR_GETGUARDSIZE, 95 PJT_ATTR_GETINHERITSCHED, 96 PJT_ATTR_GETSCHEDPARAM, 97 PJT_ATTR_GETSCHEDPOLICY, 98 PJT_ATTR_GETSCOPE, 99 PJT_ATTR_GETSTACKADDR, 100 PJT_ATTR_GETSTACKSIZE, 101 PJT_ATTR_INIT, 102 PJT_ATTR_SETDETACHSTATE, 103 PJT_ATTR_SETGUARDSIZE, 104 PJT_ATTR_SETINHERITSCHED, 105 PJT_ATTR_SETSCHEDPARAM, 106 PJT_ATTR_SETSCHEDPOLICY, 107 PJT_ATTR_SETSCOPE, 108 PJT_ATTR_SETSTACKADDR, 109 PJT_ATTR_SETSTACKSIZE, 110 PJT_CANCEL, 111 PJT_CLEANUP_POP, 112 PJT_CLEANUP_PUSH, 113 PJT_COND_BROADCAST, 114 PJT_COND_DESTROY, 115 PJT_COND_INIT, 116 PJT_COND_SIGNAL, 117 PJT_COND_TIMEDWAIT, 118 PJT_COND_WAIT, 119 PJT_DETACH, 120 PJT_EQUAL, 121 PJT_EXIT, 122 PJT_GETSPECIFIC, 123 PJT_JOIN, 124 PJT_KEY_CREATE, 125 PJT_KEY_DELETE, 126 PJT_KILL, 127 PJT_MAIN_NP, 128 PJT_MUTEXATTR_DESTROY, 129 PJT_MUTEXATTR_INIT, 130 PJT_MUTEXATTR_SETTYPE, 131 PJT_MUTEX_DESTROY, 132 PJT_MUTEX_INIT, 133 PJT_MUTEX_LOCK, 134 PJT_MUTEX_TRYLOCK, 135 PJT_MUTEX_UNLOCK, 136 PJT_ONCE, 137 PJT_RWLOCK_DESTROY, 138 PJT_RWLOCK_INIT, 139 PJT_RWLOCK_RDLOCK, 140 PJT_RWLOCK_TRYRDLOCK, 141 PJT_RWLOCK_TRYWRLOCK, 142 PJT_RWLOCK_UNLOCK, 143 PJT_RWLOCK_WRLOCK, 144 PJT_SELF, 145 PJT_SETCANCELSTATE, 146 PJT_SETCANCELTYPE, 147 PJT_SETSPECIFIC, 148 PJT_SIGMASK, 149 PJT_TESTCANCEL, 150 PJT_CLEANUP_POP_IMP, 151 PJT_CLEANUP_PUSH_IMP, 152 PJT_CANCEL_ENTER, 153 PJT_CANCEL_LEAVE, 154 PJT_MAX 155 } pjt_index_t; 156 157 typedef int (*pthread_func_t)(void); 158 typedef pthread_func_t pthread_func_entry_t[2]; 159 160 extern pthread_func_entry_t __thr_jtable[]; 161 162 /* 163 * yplib internal interfaces 164 */ 165 #ifdef YP 166 int _yp_check(char **); 167 #endif 168 169 /* 170 * Initialise TLS for static programs 171 */ 172 void _init_tls(void); 173 174 /* 175 * Provides pthread_once()-like functionality for both single-threaded 176 * and multi-threaded applications. 177 */ 178 int _once(pthread_once_t *, void (*)(void)); 179 180 /* 181 * Set the TLS thread pointer 182 */ 183 void _set_tp(void *tp); 184 185 /* 186 * This is a pointer in the C run-time startup code. It is used 187 * by getprogname() and setprogname(). 188 */ 189 extern const char *__progname; 190 191 /* 192 * This function is used by the threading libraries to notify malloc that a 193 * thread is exiting. 194 */ 195 void _malloc_thread_cleanup(void); 196 197 /* 198 * These functions are used by the threading libraries in order to protect 199 * malloc across fork(). 200 */ 201 void _malloc_prefork(void); 202 void _malloc_postfork(void); 203 204 /* 205 * Function to clean up streams, called from abort() and exit(). 206 */ 207 extern void (*__cleanup)(void); 208 209 /* 210 * Get kern.osreldate to detect ABI revisions. Explicitly 211 * ignores value of $OSVERSION and caches result. Prototypes 212 * for the wrapped "new" pad-less syscalls are here for now. 213 */ 214 extern int __getosreldate(void); 215 #include <sys/_types.h> 216 /* Without pad */ 217 extern __off_t __sys_lseek(int, __off_t, int); 218 extern int __sys_ftruncate(int, __off_t); 219 extern int __sys_truncate(const char *, __off_t); 220 extern __ssize_t __sys_pread(int, void *, __size_t, __off_t); 221 extern __ssize_t __sys_pwrite(int, const void *, __size_t, __off_t); 222 extern void * __sys_mmap(void *, __size_t, int, int, int, __off_t); 223 224 /* With pad */ 225 extern __off_t __sys_freebsd6_lseek(int, int, __off_t, int); 226 extern int __sys_freebsd6_ftruncate(int, int, __off_t); 227 extern int __sys_freebsd6_truncate(const char *, int, __off_t); 228 extern __ssize_t __sys_freebsd6_pread(int, void *, __size_t, int, __off_t); 229 extern __ssize_t __sys_freebsd6_pwrite(int, const void *, __size_t, int, __off_t); 230 extern void * __sys_freebsd6_mmap(void *, __size_t, int, int, int, int, __off_t); 231 232 /* Without back-compat translation */ 233 extern int __sys_fcntl(int, int, ...); 234 235 /* execve() with PATH processing to implement posix_spawnp() */ 236 int _execvpe(const char *, char * const *, char * const *); 237 238 int _elf_aux_info(int aux, void *buf, int buflen); 239 struct dl_phdr_info; 240 int __elf_phdr_match_addr(struct dl_phdr_info *, void *); 241 void __init_elf_aux_vector(void); 242 243 void _pthread_cancel_enter(int); 244 void _pthread_cancel_leave(int); 245 246 #endif /* _LIBC_PRIVATE_H_ */ 247