libc-internal.h 18 KB

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  1. /* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. #ifndef _LIBC_INTERNAL_H
  16. #define _LIBC_INTERNAL_H 1
  17. #include <features.h>
  18. #ifndef __ASSEMBLER__
  19. /* GCC understands weak symbols and aliases; use its interface where
  20. possible, instead of embedded assembly language. */
  21. /* Define ALIASNAME as a strong alias for NAME. */
  22. # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
  23. # define _strong_alias(name, aliasname) \
  24. extern __typeof (name) aliasname __attribute__ ((alias (#name)));
  25. /* This comes between the return type and function name in
  26. a function definition to make that definition weak. */
  27. # define weak_function __attribute__ ((weak))
  28. # define weak_const_function __attribute__ ((weak, __const__))
  29. /* Define ALIASNAME as a weak alias for NAME.
  30. If weak aliases are not available, this defines a strong alias. */
  31. # define weak_alias(name, aliasname) _weak_alias (name, aliasname)
  32. # define _weak_alias(name, aliasname) \
  33. extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
  34. /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */
  35. # define weak_extern(symbol) _weak_extern (weak symbol)
  36. # define _weak_extern(expr) _Pragma (#expr)
  37. #else /* __ASSEMBLER__ */
  38. #ifdef __SYMBOL_PREFIX
  39. # define C_SYMBOL_NAME(name) _##name
  40. #else
  41. # define C_SYMBOL_NAME(name) name
  42. #endif
  43. # define strong_alias(name, aliasname) \
  44. .global C_SYMBOL_NAME (aliasname) ; \
  45. .set C_SYMBOL_NAME(aliasname),C_SYMBOL_NAME(name)
  46. # define weak_alias(name, aliasname) \
  47. .weak C_SYMBOL_NAME(aliasname) ; \
  48. C_SYMBOL_NAME(aliasname) = C_SYMBOL_NAME(name)
  49. # define weak_extern(symbol) \
  50. .weak C_SYMBOL_NAME(symbol)
  51. #endif /* __ASSEMBLER__ */
  52. /* When a reference to SYMBOL is encountered, the linker will emit a
  53. warning message MSG. */
  54. #ifdef __HAVE_ELF__
  55. /* We want the .gnu.warning.SYMBOL section to be unallocated. */
  56. # define __make_section_unallocated(section_string) \
  57. asm (".section " section_string "\n\t.previous");
  58. /* Tacking on "\n\t#" to the section name makes gcc put it's bogus
  59. section attributes on what looks like a comment to the assembler. */
  60. # ifdef __sparc__ //HAVE_SECTION_QUOTES
  61. # define __sec_comment "\"\n\t#\""
  62. # else
  63. # define __sec_comment "\n\t#"
  64. # endif
  65. # ifdef __cris__
  66. # define link_warning(symbol, msg)
  67. # else
  68. # define link_warning(symbol, msg) \
  69. __make_section_unallocated (".gnu.warning." #symbol) \
  70. static const char __evoke_link_warning_##symbol[] \
  71. __attribute__ ((used, section (".gnu.warning." #symbol __sec_comment))) \
  72. = msg;
  73. # endif
  74. #else /* __HAVE_ELF__ */
  75. # define link_warning(symbol, msg) \
  76. asm (".stabs \"" msg "\",30,0,0,0\n\t" \
  77. ".stabs \"" __C_SYMBOL_PREFIX__ #symbol "\",1,0,0,0\n");
  78. #endif /* __HAVE_ELF__ */
  79. #ifndef weak_function
  80. /* If we do not have the __attribute__ ((weak)) syntax, there is no way we
  81. can define functions as weak symbols. The compiler will emit a `.globl'
  82. directive for the function symbol, and a `.weak' directive in addition
  83. will produce an error from the assembler. */
  84. # define weak_function /* empty */
  85. # define weak_const_function /* empty */
  86. #endif
  87. /* On some platforms we can make internal function calls (i.e., calls of
  88. functions not exported) a bit faster by using a different calling
  89. convention. */
  90. #if 0 /*def __i386__*/
  91. # define internal_function __attribute__ ((regparm (3), stdcall))
  92. #endif
  93. #ifndef internal_function
  94. # define internal_function /* empty */
  95. #endif
  96. #ifndef NOT_IN_libc
  97. # define IS_IN_libc 1
  98. #endif
  99. /* Prepare for the case that `__builtin_expect' is not available. */
  100. #if __GNUC__ == 2 && __GNUC_MINOR__ < 96
  101. # define __builtin_expect(x, expected_value) (x)
  102. #endif
  103. #ifndef likely
  104. # define likely(x) __builtin_expect((!!(x)),1)
  105. #endif
  106. #ifndef unlikely
  107. # define unlikely(x) __builtin_expect((!!(x)),0)
  108. #endif
  109. #ifndef __LINUX_COMPILER_H
  110. # define __LINUX_COMPILER_H
  111. #endif
  112. #ifndef __cast__
  113. # define __cast__(_to)
  114. #endif
  115. #define attribute_unused __attribute__ ((unused))
  116. /* Arrange to hide uClibc internals */
  117. #if __GNUC_PREREQ (3, 3)
  118. # define attribute_hidden __attribute__ ((visibility ("hidden")))
  119. #else
  120. # define attribute_hidden
  121. #endif
  122. #ifndef __ASSEMBLER__
  123. # define hidden_strong_alias(name, aliasname) _hidden_strong_alias(name, aliasname)
  124. # define _hidden_strong_alias(name, aliasname) \
  125. extern __typeof (name) aliasname __attribute__ ((alias (#name))) attribute_hidden;
  126. # define hidden_weak_alias(name, aliasname) _hidden_weak_alias (name, aliasname)
  127. # define _hidden_weak_alias(name, aliasname) \
  128. extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))) attribute_hidden;
  129. #else /* __ASSEMBLER__ */
  130. # define hidden_strong_alias(name, aliasname) \
  131. .global C_SYMBOL_NAME (aliasname) ; \
  132. .hidden C_SYMBOL_NAME (aliasname) ; \
  133. .set C_SYMBOL_NAME(aliasname),C_SYMBOL_NAME(name)
  134. # define hidden_weak_alias(name, aliasname) \
  135. .weak C_SYMBOL_NAME(aliasname) ; \
  136. .hidden C_SYMBOL_NAME(aliasname) ; \
  137. C_SYMBOL_NAME(aliasname) = C_SYMBOL_NAME(name)
  138. #endif /* __ASSEMBLER__ */
  139. #ifdef __UCLIBC_BUILD_RELRO__
  140. # define attribute_relro __attribute__ ((section (".data.rel.ro")))
  141. #else
  142. # define attribute_relro
  143. #endif
  144. #ifdef __GNUC__
  145. # define attribute_noreturn __attribute__ ((__noreturn__))
  146. #else
  147. # define attribute_noreturn
  148. #endif
  149. #ifdef __UCLIBC_HAS_THREADS_NATIVE__
  150. # define attribute_tls_model_ie __attribute__ ((tls_model ("initial-exec")))
  151. #endif
  152. /* Pull in things like __attribute_used__ */
  153. #include <sys/cdefs.h>
  154. /* --- this is added to integrate linuxthreads */
  155. #define __USE_UNIX98 1
  156. #ifndef __ASSEMBLER__
  157. # ifdef IS_IN_libc
  158. # define __UC(N) __ ## N
  159. # define __UC_ALIAS(N) strong_alias( __ ## N , N )
  160. # if defined __UCLIBC_HAS_XLOCALE__ && defined __UCLIBC_DO_XLOCALE
  161. # define __UCXL(N) __ ## N ## _l
  162. # define __UCXL_ALIAS(N) strong_alias ( __ ## N ## _l , N ## _l )
  163. # else
  164. # define __UCXL(N) __UC(N)
  165. # define __UCXL_ALIAS(N) __UC_ALIAS(N)
  166. # endif
  167. # define __need_size_t
  168. # ifdef __UCLIBC_HAS_WCHAR__
  169. # define __need_wchar_t
  170. # define __need_wint_t
  171. # endif
  172. # include <stddef.h>
  173. # include <bits/types.h>
  174. # ifndef __ssize_t_defined
  175. typedef __ssize_t ssize_t;
  176. # define __ssize_t_defined
  177. # endif
  178. # include <bits/sigset.h>
  179. /* prototypes for internal use, please keep these in sync w/ updated headers */
  180. /* #include <fcntl.h> */
  181. #ifndef __USE_FILE_OFFSET64
  182. extern int __open (__const char *__file, int __oflag, ...) __nonnull ((1)) attribute_hidden;
  183. extern int __fcntl (int __fd, int __cmd, ...) attribute_hidden;
  184. #else
  185. # ifdef __REDIRECT
  186. extern int __REDIRECT (__open, (__const char *__file, int __oflag, ...), __open64)
  187. __nonnull ((1)) attribute_hidden;
  188. extern int __REDIRECT (__fcntl, (int __fd, int __cmd, ...), __fcntl64) attribute_hidden;
  189. # else
  190. # define __open __open64
  191. # define __fcntl __fcntl64
  192. # endif
  193. #endif
  194. #ifdef __USE_LARGEFILE64
  195. extern int __open64 (__const char *__file, int __oflag, ...) __nonnull ((1)) attribute_hidden;
  196. extern int __fcntl64 (int __fd, int __cmd, ...) attribute_hidden;
  197. #endif
  198. /* #include <string.h> */
  199. extern int __memcmp (__const void *__s1, __const void *__s2, size_t __n) attribute_hidden;
  200. extern void *__memcpy (void *__restrict __dest,
  201. __const void *__restrict __src, size_t __n) attribute_hidden;
  202. extern void *__memmove (void *__dest, __const void *__src, size_t __n) attribute_hidden;
  203. extern void *__memset (void *__s, int __c, size_t __n) attribute_hidden;
  204. extern char *__strcpy (char *__restrict __dest, __const char *__restrict __src) attribute_hidden;
  205. extern size_t __strlen (__const char *__s) attribute_hidden;
  206. extern int __strcmp (__const char *__s1, __const char *__s2) attribute_hidden;
  207. extern char *__strcat (char *__restrict __dest, __const char *__restrict __src) attribute_hidden;
  208. extern char *__strncpy (char *__restrict __dest,
  209. __const char *__restrict __src, size_t __n) attribute_hidden;
  210. extern char *__strchr (__const char *__s, int __c) attribute_hidden;
  211. extern char *__strrchr (__const char *__s, int __c) attribute_hidden;
  212. extern int __strncmp (__const char *__s1, __const char *__s2, size_t __n) attribute_hidden;
  213. extern char *__strdup (__const char *__s) attribute_hidden;
  214. extern int __strcasecmp (__const char *__s1, __const char *__s2) attribute_hidden;
  215. extern int __strncasecmp (__const char *__s1, __const char *__s2, size_t __n) attribute_hidden;
  216. extern void *__rawmemchr (__const void *__s, int __c) __THROW __attribute_pure__ __nonnull ((1)) attribute_hidden;
  217. extern size_t __strspn (__const char *__s, __const char *__accept)
  218. __THROW __attribute_pure__ __nonnull ((1, 2)) attribute_hidden;
  219. extern char *__strpbrk (__const char *__s, __const char *__accept)
  220. __THROW __attribute_pure__ __nonnull ((1, 2)) attribute_hidden;
  221. extern size_t __strnlen (__const char *__string, size_t __maxlen)
  222. __THROW __attribute_pure__ __nonnull ((1)) attribute_hidden;
  223. extern char *__strtok_r (char *__restrict __s, __const char *__restrict __delim,
  224. char **__restrict __save_ptr) __THROW __nonnull ((2, 3)) attribute_hidden;
  225. /* sources are built w/ _GNU_SOURCE, this gets undefined */
  226. extern int __xpg_strerror_r_internal (int __errnum, char *__buf, size_t __buflen) attribute_hidden;
  227. extern char *__glibc_strerror_r_internal (int __errnum, char *__buf, size_t __buflen) attribute_hidden;
  228. /* ctype.h */
  229. extern int __tolower (int __c) __THROW attribute_hidden;
  230. extern int __toupper (int __c) __THROW attribute_hidden;
  231. #ifdef __UCLIBC_HAS_WCHAR__
  232. /* wchar.h */
  233. extern size_t __wcslen (__const wchar_t *__s) __THROW __attribute_pure__ attribute_hidden;
  234. extern wchar_t *__wcscpy (wchar_t *__restrict __dest, __const wchar_t *__restrict __src) __THROW attribute_hidden;
  235. extern size_t __wcsspn (__const wchar_t *__wcs, __const wchar_t *__accept)
  236. __THROW __attribute_pure__ attribute_hidden;
  237. extern wchar_t *__wcspbrk (__const wchar_t *__wcs, __const wchar_t *__accept)
  238. __THROW __attribute_pure__ attribute_hidden;
  239. /* wctype.h */
  240. extern wint_t __towlower (wint_t __wc) __THROW attribute_hidden;
  241. #endif
  242. /* #include <unistd.h> */
  243. extern ssize_t __read(int __fd, void *__buf, size_t __nbytes) attribute_hidden;
  244. extern ssize_t __write(int __fd, __const void *__buf, size_t __n) attribute_hidden;
  245. extern int __close(int __fd) attribute_hidden;
  246. extern __pid_t __getpid (void) attribute_hidden;
  247. extern void _exit_internal (int __status) __attribute__ ((__noreturn__)) attribute_hidden;
  248. #ifndef __USE_FILE_OFFSET64
  249. extern int __lockf (int __fd, int __cmd, __off_t __len) attribute_hidden;
  250. extern __off_t __lseek (int __fd, __off_t __offset, int __whence) __THROW attribute_hidden;
  251. #else
  252. # ifdef __REDIRECT
  253. extern int __REDIRECT (__lockf, (int __fd, int __cmd, __off64_t __len),
  254. __lockf64) attribute_hidden;
  255. extern __off64_t __REDIRECT (__lseek,
  256. (int __fd, __off64_t __offset, int __whence),
  257. __lseek64) attribute_hidden;
  258. # else
  259. # define __lockf __lockf64
  260. # define __lseek __lseek64
  261. # endif
  262. #endif
  263. #ifdef __USE_LARGEFILE64
  264. extern int __lockf64 (int __fd, int __cmd, __off64_t __len) attribute_hidden;
  265. extern __off64_t __lseek64 (int __fd, __off64_t __offset, int __whence) __THROW attribute_hidden;
  266. #endif
  267. /* #include <stdio.h> */
  268. extern void __perror (__const char *__s) attribute_hidden;
  269. extern int __printf (__const char *__restrict __format, ...) attribute_hidden;
  270. extern int __sprintf (char *__restrict __s,
  271. __const char *__restrict __format, ...) attribute_hidden;
  272. /* hack */
  273. #define abort __abort
  274. #define fprintf __fprintf
  275. #define fclose __fclose
  276. #ifndef __USE_FILE_OFFSET64
  277. #define fopen __fopen
  278. #else
  279. #define fopen __fopen64
  280. #endif
  281. #ifdef __USE_LARGEFILE64
  282. #define fopen64 __fopen64
  283. #endif
  284. /* #include <stdlib.h> */
  285. extern char *__getenv (__const char *__name) attribute_hidden;
  286. extern void __exit (int __status) __THROW __attribute__ ((__noreturn__)) attribute_hidden;
  287. /* #include <signal.h> */
  288. extern int __sigprocmask (int __how, __const __sigset_t *__restrict __set,
  289. __sigset_t *__restrict __oset) attribute_hidden;
  290. /* #include <sys/ioctl.h> */
  291. extern int __ioctl (int __fd, unsigned long int __request, ...) attribute_hidden;
  292. /* #include <sys/socket.h> */
  293. extern int __socket (int __domain, int __type, int __protocol) attribute_hidden;
  294. /* #include <sys/stat.h> */
  295. #ifndef __USE_FILE_OFFSET64
  296. struct stat;
  297. extern int __stat (__const char *__restrict __file,
  298. struct stat *__restrict __buf) __THROW __nonnull ((1, 2)) attribute_hidden;
  299. extern int __fstat (int __fd, struct stat *__buf) __THROW __nonnull ((2)) attribute_hidden;
  300. extern int __lstat (__const char *__restrict __file,
  301. struct stat *__restrict __buf) __THROW __nonnull ((1, 2)) attribute_hidden;
  302. #else
  303. # ifdef __REDIRECT_NTH
  304. extern int __REDIRECT_NTH (__stat, (__const char *__restrict __file,
  305. struct stat *__restrict __buf), __stat64)
  306. __nonnull ((1, 2)) attribute_hidden;
  307. extern int __REDIRECT_NTH (__fstat, (int __fd, struct stat *__buf), __fstat64)
  308. __nonnull ((2)) attribute_hidden;
  309. extern int __REDIRECT_NTH (__lstat,
  310. (__const char *__restrict __file,
  311. struct stat *__restrict __buf), __lstat64)
  312. __nonnull ((1, 2)) attribute_hidden;
  313. # else
  314. # define __stat __stat64
  315. # define __fstat __fstat64
  316. # define __lstat __lstat64
  317. # endif
  318. #endif
  319. #ifdef __USE_LARGEFILE64
  320. struct stat64;
  321. extern int __stat64 (__const char *__restrict __file,
  322. struct stat64 *__restrict __buf) __THROW __nonnull ((1, 2)) attribute_hidden;
  323. extern int __fstat64 (int __fd, struct stat64 *__buf) __THROW __nonnull ((2)) attribute_hidden;
  324. extern int __lstat64 (__const char *__restrict __file,
  325. struct stat64 *__restrict __buf)
  326. __THROW __nonnull ((1, 2)) attribute_hidden;
  327. #endif
  328. /* #include <sys/statfs.h> */
  329. #ifndef __USE_FILE_OFFSET64
  330. struct statfs;
  331. extern int __statfs (__const char *__file, struct statfs *__buf)
  332. __THROW __nonnull ((1, 2)) attribute_hidden;
  333. extern int __fstatfs (int __fildes, struct statfs *__buf)
  334. __THROW __nonnull ((2)) attribute_hidden;
  335. #else
  336. # ifdef __REDIRECT
  337. extern int __REDIRECT (__statfs,
  338. (__const char *__file, struct statfs *__buf),
  339. __statfs64) __nonnull ((1, 2)) attribute_hidden;
  340. extern int __REDIRECT (__fstatfs, (int __fildes, struct statfs *__buf),
  341. __fstatfs64) __nonnull ((2)) attribute_hidden;
  342. # else
  343. # define __statfs __statfs64
  344. # endif
  345. #endif
  346. #ifdef __USE_LARGEFILE64
  347. struct statfs64;
  348. extern int __statfs64 (__const char *__file, struct statfs64 *__buf)
  349. __THROW __nonnull ((1, 2)) attribute_hidden;
  350. extern int __fstatfs64 (int __fildes, struct statfs64 *__buf)
  351. __THROW __nonnull ((2)) attribute_hidden;
  352. #endif
  353. # if 0 /* undoable here */
  354. /* #include <dirent.h> */
  355. typedef struct __dirstream DIR;
  356. extern DIR *__opendir (__const char *__name) attribute_hidden;
  357. extern int __closedir (DIR *__dirp) attribute_hidden;
  358. /* #include <stdio.h> */
  359. extern int __vfprintf (FILE *__restrict __s, __const char *__restrict __format,
  360. __gnuc_va_list __arg) attribute_hidden;
  361. extern int __fprintf (FILE *__restrict __stream,
  362. __const char *__restrict __format, ...) attribute_hidden;
  363. extern int __fclose (FILE *__stream) attribute_hidden;
  364. #ifndef __USE_FILE_OFFSET64
  365. extern FILE *__fopen (__const char *__restrict __filename,
  366. __const char *__restrict __modes) attribute_hidden;
  367. #else
  368. # ifdef __REDIRECT
  369. extern FILE *__REDIRECT (__fopen, (__const char *__restrict __filename,
  370. __const char *__restrict __modes), __fopen64) attribute_hidden;
  371. # else
  372. # define __fopen __fopen64
  373. # endif
  374. #endif
  375. #ifdef __USE_LARGEFILE64
  376. extern FILE *__fopen64 (__const char *__restrict __filename,
  377. __const char *__restrict __modes) attribute_hidden;
  378. #endif
  379. /* #include <sys/time.h> */
  380. # define __need_timeval
  381. # include <bits/time.h>
  382. extern int __gettimeofday(struct timeval *__restrict __tv, *__restrict __timezone__ptr_t __tz) attribute_hidden;
  383. # endif
  384. /* #include <pthread.h> */
  385. # ifndef __UCLIBC_HAS_THREADS__
  386. # define __pthread_mutex_init(mutex, mutexattr) ((void)0)
  387. # define __pthread_mutex_lock(mutex) ((void)0)
  388. # define __pthread_mutex_trylock(mutex) ((void)0)
  389. # define __pthread_mutex_unlock(mutex) ((void)0)
  390. # endif
  391. /* internal access to program name */
  392. extern const char *__uclibc_progname attribute_hidden;
  393. # endif /* IS_IN_libc */
  394. /* #include <alloca.h> */
  395. #include <bits/stackinfo.h>
  396. #if _STACK_GROWS_DOWN
  397. # define extend_alloca(buf, len, newlen) \
  398. (__typeof (buf)) ({ size_t __newlen = (newlen); \
  399. char *__newbuf = alloca (__newlen); \
  400. if (__newbuf + __newlen == (char *) buf) \
  401. len += __newlen; \
  402. else \
  403. len = __newlen; \
  404. __newbuf; })
  405. #elif _STACK_GROWS_UP
  406. # define extend_alloca(buf, len, newlen) \
  407. (__typeof (buf)) ({ size_t __newlen = (newlen); \
  408. char *__newbuf = alloca (__newlen); \
  409. char *__buf = (buf); \
  410. if (__buf + __newlen == __newbuf) \
  411. { \
  412. len += __newlen; \
  413. __newbuf = __buf; \
  414. } \
  415. else \
  416. len = __newlen; \
  417. __newbuf; })
  418. #else
  419. # warning unknown stack
  420. # define extend_alloca(buf, len, newlen) \
  421. alloca (((len) = (newlen)))
  422. #endif
  423. #endif /* __ASSEMBLER__ */
  424. #endif /* _LIBC_INTERNAL_H */