Contents of /trunk/mkinitrd-magellan/busybox/include/platform.h
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Sun May 30 11:32:42 2010 UTC (14 years, 3 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (14 years, 3 months ago) by niro
File MIME type: text/plain
File size: 12090 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | Copyright 2006, Bernhard Reutner-Fischer |
4 | |
5 | Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
6 | */ |
7 | #ifndef BB_PLATFORM_H |
8 | #define BB_PLATFORM_H 1 |
9 | |
10 | /* Assume all these functions exist by default. Platforms where it is not |
11 | * true will #undef them below. |
12 | */ |
13 | #define HAVE_FDPRINTF 1 |
14 | #define HAVE_MEMRCHR 1 |
15 | #define HAVE_MKDTEMP 1 |
16 | #define HAVE_SETBIT 1 |
17 | #define HAVE_STRCASESTR 1 |
18 | #define HAVE_STRCHRNUL 1 |
19 | #define HAVE_STRSIGNAL 1 |
20 | #define HAVE_VASPRINTF 1 |
21 | |
22 | /* Convenience macros to test the version of gcc. */ |
23 | #undef __GNUC_PREREQ |
24 | #if defined __GNUC__ && defined __GNUC_MINOR__ |
25 | # define __GNUC_PREREQ(maj, min) \ |
26 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
27 | #else |
28 | # define __GNUC_PREREQ(maj, min) 0 |
29 | #endif |
30 | |
31 | /* __restrict is known in EGCS 1.2 and above. */ |
32 | #if !__GNUC_PREREQ(2,92) |
33 | # ifndef __restrict |
34 | # define __restrict |
35 | # endif |
36 | #endif |
37 | |
38 | /* Define macros for some gcc attributes. This permits us to use the |
39 | macros freely, and know that they will come into play for the |
40 | version of gcc in which they are supported. */ |
41 | |
42 | #if !__GNUC_PREREQ(2,7) |
43 | # ifndef __attribute__ |
44 | # define __attribute__(x) |
45 | # endif |
46 | #endif |
47 | |
48 | #undef inline |
49 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
50 | /* it's a keyword */ |
51 | #elif __GNUC_PREREQ(2,7) |
52 | # define inline __inline__ |
53 | #else |
54 | # define inline |
55 | #endif |
56 | |
57 | #ifndef __const |
58 | # define __const const |
59 | #endif |
60 | |
61 | #define UNUSED_PARAM __attribute__ ((__unused__)) |
62 | #define NORETURN __attribute__ ((__noreturn__)) |
63 | /* "The malloc attribute is used to tell the compiler that a function |
64 | * may be treated as if any non-NULL pointer it returns cannot alias |
65 | * any other pointer valid when the function returns. This will often |
66 | * improve optimization. Standard functions with this property include |
67 | * malloc and calloc. realloc-like functions have this property as long |
68 | * as the old pointer is never referred to (including comparing it |
69 | * to the new pointer) after the function returns a non-NULL value." |
70 | */ |
71 | #define RETURNS_MALLOC __attribute__ ((malloc)) |
72 | #define PACKED __attribute__ ((__packed__)) |
73 | #define ALIGNED(m) __attribute__ ((__aligned__(m))) |
74 | |
75 | /* __NO_INLINE__: some gcc's do not honor inlining! :( */ |
76 | #if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__) |
77 | # define ALWAYS_INLINE __attribute__ ((always_inline)) inline |
78 | /* I've seen a toolchain where I needed __noinline__ instead of noinline */ |
79 | # define NOINLINE __attribute__((__noinline__)) |
80 | # if !ENABLE_WERROR |
81 | # define DEPRECATED __attribute__ ((__deprecated__)) |
82 | # define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result)) |
83 | # else |
84 | # define DEPRECATED |
85 | # define UNUSED_PARAM_RESULT |
86 | # endif |
87 | #else |
88 | # define ALWAYS_INLINE inline |
89 | # define NOINLINE |
90 | # define DEPRECATED |
91 | # define UNUSED_PARAM_RESULT |
92 | #endif |
93 | |
94 | /* -fwhole-program makes all symbols local. The attribute externally_visible |
95 | forces a symbol global. */ |
96 | #if __GNUC_PREREQ(4,1) |
97 | # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )) |
98 | //__attribute__ ((__externally_visible__)) |
99 | #else |
100 | # define EXTERNALLY_VISIBLE |
101 | #endif |
102 | |
103 | /* We use __extension__ in some places to suppress -pedantic warnings |
104 | about GCC extensions. This feature didn't work properly before |
105 | gcc 2.8. */ |
106 | #if !__GNUC_PREREQ(2,8) |
107 | # ifndef __extension__ |
108 | # define __extension__ |
109 | # endif |
110 | #endif |
111 | |
112 | /* gcc-2.95 had no va_copy but only __va_copy. */ |
113 | #if !__GNUC_PREREQ(3,0) |
114 | # include <stdarg.h> |
115 | # if !defined va_copy && defined __va_copy |
116 | # define va_copy(d,s) __va_copy((d),(s)) |
117 | # endif |
118 | #endif |
119 | |
120 | /* FAST_FUNC is a qualifier which (possibly) makes function call faster |
121 | * and/or smaller by using modified ABI. It is usually only needed |
122 | * on non-static, busybox internal functions. Recent versions of gcc |
123 | * optimize statics automatically. FAST_FUNC on static is required |
124 | * only if you need to match a function pointer's type */ |
125 | #if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */ |
126 | /* stdcall makes callee to pop arguments from stack, not caller */ |
127 | # define FAST_FUNC __attribute__((regparm(3),stdcall)) |
128 | /* #elif ... - add your favorite arch today! */ |
129 | #else |
130 | # define FAST_FUNC |
131 | #endif |
132 | |
133 | /* Make all declarations hidden (-fvisibility flag only affects definitions) */ |
134 | /* (don't include system headers after this until corresponding pop!) */ |
135 | #if __GNUC_PREREQ(4,1) |
136 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)") |
137 | # define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop") |
138 | #else |
139 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
140 | # define POP_SAVED_FUNCTION_VISIBILITY |
141 | #endif |
142 | |
143 | /* ---- Endian Detection ------------------------------------ */ |
144 | |
145 | #if defined(__digital__) && defined(__unix__) |
146 | # include <sex.h> |
147 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) |
148 | # define __BYTE_ORDER BYTE_ORDER |
149 | #elif defined __FreeBSD__ |
150 | # include <sys/resource.h> /* rlimit */ |
151 | # include <machine/endian.h> |
152 | # define bswap_64 __bswap64 |
153 | # define bswap_32 __bswap32 |
154 | # define bswap_16 __bswap16 |
155 | # define __BIG_ENDIAN__ (_BYTE_ORDER == _BIG_ENDIAN) |
156 | #elif !defined __APPLE__ |
157 | # include <byteswap.h> |
158 | # include <endian.h> |
159 | #endif |
160 | |
161 | #if defined(__BIG_ENDIAN__) && __BIG_ENDIAN__ |
162 | # define BB_BIG_ENDIAN 1 |
163 | # define BB_LITTLE_ENDIAN 0 |
164 | #elif __BYTE_ORDER == __BIG_ENDIAN |
165 | # define BB_BIG_ENDIAN 1 |
166 | # define BB_LITTLE_ENDIAN 0 |
167 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
168 | # define BB_BIG_ENDIAN 0 |
169 | # define BB_LITTLE_ENDIAN 1 |
170 | #else |
171 | # error "Can't determine endianness" |
172 | #endif |
173 | |
174 | /* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */ |
175 | #if BB_BIG_ENDIAN |
176 | # define SWAP_BE16(x) (x) |
177 | # define SWAP_BE32(x) (x) |
178 | # define SWAP_BE64(x) (x) |
179 | # define SWAP_LE16(x) bswap_16(x) |
180 | # define SWAP_LE32(x) bswap_32(x) |
181 | # define SWAP_LE64(x) bswap_64(x) |
182 | #else |
183 | # define SWAP_BE16(x) bswap_16(x) |
184 | # define SWAP_BE32(x) bswap_32(x) |
185 | # define SWAP_BE64(x) bswap_64(x) |
186 | # define SWAP_LE16(x) (x) |
187 | # define SWAP_LE32(x) (x) |
188 | # define SWAP_LE64(x) (x) |
189 | #endif |
190 | |
191 | /* ---- Unaligned access ------------------------------------ */ |
192 | |
193 | /* NB: unaligned parameter should be a pointer, aligned one - |
194 | * a lvalue. This makes it more likely to not swap them by mistake |
195 | */ |
196 | #if defined(i386) || defined(__x86_64__) |
197 | # define move_from_unaligned_int(v, intp) ((v) = *(int*)(intp)) |
198 | # define move_from_unaligned16(v, u16p) ((v) = *(uint16_t*)(u16p)) |
199 | # define move_from_unaligned32(v, u32p) ((v) = *(uint32_t*)(u32p)) |
200 | # define move_to_unaligned32(u32p, v) (*(uint32_t*)(u32p) = (v)) |
201 | /* #elif ... - add your favorite arch today! */ |
202 | #else |
203 | /* performs reasonably well (gcc usually inlines memcpy here) */ |
204 | # define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int))) |
205 | # define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2)) |
206 | # define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4)) |
207 | # define move_to_unaligned32(u32p, v) do { \ |
208 | uint32_t __t = (v); \ |
209 | memcpy((u32p), &__t, 4); \ |
210 | } while (0) |
211 | #endif |
212 | |
213 | /* ---- Networking ------------------------------------------ */ |
214 | |
215 | #ifndef __APPLE__ |
216 | # include <arpa/inet.h> |
217 | # if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED) |
218 | typedef int socklen_t; |
219 | # endif |
220 | #else |
221 | # include <netinet/in.h> |
222 | #endif |
223 | |
224 | /* ---- Compiler dependent settings ------------------------- */ |
225 | |
226 | #if (defined __digital__ && defined __unix__) \ |
227 | || defined __APPLE__ || defined __FreeBSD__ |
228 | # undef HAVE_MNTENT_H |
229 | # undef HAVE_SYS_STATFS_H |
230 | #else |
231 | # define HAVE_MNTENT_H 1 |
232 | # define HAVE_SYS_STATFS_H 1 |
233 | #endif |
234 | |
235 | /*----- Kernel versioning ------------------------------------*/ |
236 | |
237 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
238 | |
239 | /* ---- Miscellaneous --------------------------------------- */ |
240 | |
241 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ |
242 | !defined(__dietlibc__) && \ |
243 | !defined(_NEWLIB_VERSION) && \ |
244 | !(defined __digital__ && defined __unix__) |
245 | # error "Sorry, this libc version is not supported :(" |
246 | #endif |
247 | |
248 | /* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */ |
249 | |
250 | #if defined __GLIBC__ || defined __UCLIBC__ \ |
251 | || defined __dietlibc__ || defined _NEWLIB_VERSION |
252 | # include <features.h> |
253 | # define HAVE_FEATURES_H |
254 | # include <stdint.h> |
255 | # define HAVE_STDINT_H |
256 | #elif !defined __APPLE__ |
257 | /* Largest integral types. */ |
258 | # if BB_BIG_ENDIAN |
259 | /* Looks BROKEN! */ |
260 | typedef long intmax_t; |
261 | typedef unsigned long uintmax_t; |
262 | # else |
263 | __extension__ |
264 | typedef long long intmax_t; |
265 | __extension__ |
266 | typedef unsigned long long uintmax_t; |
267 | # endif |
268 | #endif |
269 | |
270 | /* Size-saving "small" ints (arch-dependent) */ |
271 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) |
272 | /* add other arches which benefit from this... */ |
273 | typedef signed char smallint; |
274 | typedef unsigned char smalluint; |
275 | #else |
276 | /* for arches where byte accesses generate larger code: */ |
277 | typedef int smallint; |
278 | typedef unsigned smalluint; |
279 | #endif |
280 | |
281 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */ |
282 | #if (defined __digital__ && defined __unix__) |
283 | /* old system without (proper) C99 support */ |
284 | # define bool smalluint |
285 | #else |
286 | /* modern system, so use it */ |
287 | # include <stdbool.h> |
288 | #endif |
289 | |
290 | /* Try to defeat gcc's alignment of "char message[]"-like data */ |
291 | #if 1 /* if needed: !defined(arch1) && !defined(arch2) */ |
292 | # define ALIGN1 __attribute__((aligned(1))) |
293 | # define ALIGN2 __attribute__((aligned(2))) |
294 | #else |
295 | /* Arches which MUST have 2 or 4 byte alignment for everything are here */ |
296 | # define ALIGN1 |
297 | # define ALIGN2 |
298 | #endif |
299 | |
300 | |
301 | /* uclibc does not implement daemon() for no-mmu systems. |
302 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. |
303 | * For earlier versions there is no reliable way to check if we are building |
304 | * for a mmu-less system. |
305 | */ |
306 | #if ENABLE_NOMMU || \ |
307 | (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ |
308 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__) |
309 | # define BB_MMU 0 |
310 | # define USE_FOR_NOMMU(...) __VA_ARGS__ |
311 | # define USE_FOR_MMU(...) |
312 | #else |
313 | # define BB_MMU 1 |
314 | # define USE_FOR_NOMMU(...) |
315 | # define USE_FOR_MMU(...) __VA_ARGS__ |
316 | #endif |
317 | |
318 | /* Don't use lchown with glibc older than 2.1.x */ |
319 | #if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1 |
320 | # define lchown chown |
321 | #endif |
322 | |
323 | #if defined(__digital__) && defined(__unix__) |
324 | |
325 | # include <standards.h> |
326 | # include <inttypes.h> |
327 | # define PRIu32 "u" |
328 | /* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */ |
329 | # define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0) |
330 | # if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET |
331 | # define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) |
332 | # endif |
333 | # if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY |
334 | # define ADJ_FREQUENCY MOD_FREQUENCY |
335 | # endif |
336 | # if !defined ADJ_TIMECONST && defined MOD_TIMECONST |
337 | # define ADJ_TIMECONST MOD_TIMECONST |
338 | # endif |
339 | # if !defined ADJ_TICK && defined MOD_CLKB |
340 | # define ADJ_TICK MOD_CLKB |
341 | # endif |
342 | |
343 | #else |
344 | |
345 | # define bb_setpgrp() setpgrp() |
346 | |
347 | #endif |
348 | |
349 | #if defined(__GLIBC__) |
350 | # define fdprintf dprintf |
351 | #endif |
352 | |
353 | #if defined(__dietlibc__) |
354 | # undef HAVE_STRCHRNUL |
355 | #endif |
356 | |
357 | #if defined(__WATCOMC__) |
358 | # undef HAVE_FDPRINTF |
359 | # undef HAVE_MEMRCHR |
360 | # undef HAVE_MKDTEMP |
361 | # undef HAVE_SETBIT |
362 | # undef HAVE_STRCASESTR |
363 | # undef HAVE_STRCHRNUL |
364 | # undef HAVE_STRSIGNAL |
365 | # undef HAVE_VASPRINTF |
366 | #endif |
367 | |
368 | #if defined(__FreeBSD__) |
369 | # undef HAVE_STRCHRNUL |
370 | #endif |
371 | |
372 | /* |
373 | * Now, define prototypes for all the functions defined in platform.c |
374 | * These must come after all the HAVE_* macros are defined (or not) |
375 | */ |
376 | |
377 | #ifndef HAVE_FDPRINTF |
378 | extern int fdprintf(int fd, const char *format, ...); |
379 | #endif |
380 | |
381 | #ifndef HAVE_MEMRCHR |
382 | extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC; |
383 | #endif |
384 | |
385 | #ifndef HAVE_MKDTEMP |
386 | extern char *mkdtemp(char *template) FAST_FUNC; |
387 | #endif |
388 | |
389 | #ifndef HAVE_SETBIT |
390 | # define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7)) |
391 | # define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7))) |
392 | #endif |
393 | |
394 | #ifndef HAVE_STRCASESTR |
395 | extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC; |
396 | #endif |
397 | |
398 | #ifndef HAVE_STRCHRNUL |
399 | extern char *strchrnul(const char *s, int c) FAST_FUNC; |
400 | #endif |
401 | |
402 | #ifndef HAVE_STRSIGNAL |
403 | /* Not exactly the same: instead of "Stopped" it shows "STOP" etc */ |
404 | # define strsignal(sig) get_signame(sig) |
405 | #endif |
406 | |
407 | #ifndef HAVE_VASPRINTF |
408 | extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC; |
409 | #endif |
410 | |
411 | #endif |