Annotation of /trunk/mkinitrd-magellan/busybox/include/platform.h
Parent Directory
| 
Revision Log
Revision 816 -
(hide annotations)
(download)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 10321 byte(s)
Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 10321 byte(s)
-updated to busybox-1.13.4
| 1 | niro | 532 | /* vi: set sw=4 ts=4: */ |
| 2 | /* | ||
| 3 | niro | 816 | Copyright 2006, Bernhard Reutner-Fischer |
| 4 | niro | 532 | |
| 5 | Licensed under the GPL v2 or later, see the file LICENSE in this tarball. | ||
| 6 | */ | ||
| 7 | #ifndef __PLATFORM_H | ||
| 8 | #define __PLATFORM_H 1 | ||
| 9 | |||
| 10 | /* Convenience macros to test the version of gcc. */ | ||
| 11 | #undef __GNUC_PREREQ | ||
| 12 | #if defined __GNUC__ && defined __GNUC_MINOR__ | ||
| 13 | # define __GNUC_PREREQ(maj, min) \ | ||
| 14 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) | ||
| 15 | #else | ||
| 16 | # define __GNUC_PREREQ(maj, min) 0 | ||
| 17 | #endif | ||
| 18 | |||
| 19 | /* __restrict is known in EGCS 1.2 and above. */ | ||
| 20 | niro | 816 | #if !__GNUC_PREREQ(2,92) |
| 21 | niro | 532 | # ifndef __restrict |
| 22 | # define __restrict /* Ignore */ | ||
| 23 | # endif | ||
| 24 | #endif | ||
| 25 | |||
| 26 | /* Define macros for some gcc attributes. This permits us to use the | ||
| 27 | macros freely, and know that they will come into play for the | ||
| 28 | version of gcc in which they are supported. */ | ||
| 29 | |||
| 30 | niro | 816 | #if !__GNUC_PREREQ(2,7) |
| 31 | niro | 532 | # ifndef __attribute__ |
| 32 | # define __attribute__(x) | ||
| 33 | # endif | ||
| 34 | #endif | ||
| 35 | |||
| 36 | #undef inline | ||
| 37 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L | ||
| 38 | /* it's a keyword */ | ||
| 39 | #else | ||
| 40 | niro | 816 | # if __GNUC_PREREQ(2,7) |
| 41 | niro | 532 | # define inline __inline__ |
| 42 | # else | ||
| 43 | # define inline | ||
| 44 | # endif | ||
| 45 | #endif | ||
| 46 | |||
| 47 | #ifndef __const | ||
| 48 | # define __const const | ||
| 49 | #endif | ||
| 50 | |||
| 51 | niro | 816 | #define UNUSED_PARAM __attribute__ ((__unused__)) |
| 52 | #define NORETURN __attribute__ ((__noreturn__)) | ||
| 53 | #define PACKED __attribute__ ((__packed__)) | ||
| 54 | #define ALIGNED(m) __attribute__ ((__aligned__(m))) | ||
| 55 | /* __NO_INLINE__: some gcc's do not honor inlining! :( */ | ||
| 56 | #if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__) | ||
| 57 | # define ALWAYS_INLINE __attribute__ ((always_inline)) inline | ||
| 58 | /* I've seen a toolchain where I needed __noinline__ instead of noinline */ | ||
| 59 | # define NOINLINE __attribute__((__noinline__)) | ||
| 60 | # if !ENABLE_WERROR | ||
| 61 | # define DEPRECATED __attribute__ ((__deprecated__)) | ||
| 62 | # define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result)) | ||
| 63 | niro | 532 | # else |
| 64 | niro | 816 | # define DEPRECATED /* n/a */ |
| 65 | # define UNUSED_PARAM_RESULT /* n/a */ | ||
| 66 | niro | 532 | # endif |
| 67 | niro | 816 | #else |
| 68 | # define ALWAYS_INLINE inline /* n/a */ | ||
| 69 | # define NOINLINE /* n/a */ | ||
| 70 | # define DEPRECATED /* n/a */ | ||
| 71 | # define UNUSED_PARAM_RESULT /* n/a */ | ||
| 72 | #endif | ||
| 73 | niro | 532 | |
| 74 | /* -fwhole-program makes all symbols local. The attribute externally_visible | ||
| 75 | forces a symbol global. */ | ||
| 76 | niro | 816 | #if __GNUC_PREREQ(4,1) |
| 77 | # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )) | ||
| 78 | //__attribute__ ((__externally_visible__)) | ||
| 79 | #else | ||
| 80 | # define EXTERNALLY_VISIBLE | ||
| 81 | #endif /* GNUC >= 4.1 */ | ||
| 82 | niro | 532 | |
| 83 | /* We use __extension__ in some places to suppress -pedantic warnings | ||
| 84 | about GCC extensions. This feature didn't work properly before | ||
| 85 | gcc 2.8. */ | ||
| 86 | niro | 816 | #if !__GNUC_PREREQ(2,8) |
| 87 | niro | 532 | # ifndef __extension__ |
| 88 | # define __extension__ | ||
| 89 | # endif | ||
| 90 | #endif | ||
| 91 | |||
| 92 | /* gcc-2.95 had no va_copy but only __va_copy. */ | ||
| 93 | niro | 816 | #if !__GNUC_PREREQ(3,0) |
| 94 | niro | 532 | # include <stdarg.h> |
| 95 | # if !defined va_copy && defined __va_copy | ||
| 96 | # define va_copy(d,s) __va_copy((d),(s)) | ||
| 97 | # endif | ||
| 98 | #endif | ||
| 99 | |||
| 100 | niro | 816 | /* FAST_FUNC is a qualifier which (possibly) makes function call faster |
| 101 | * and/or smaller by using modified ABI. It is usually only needed | ||
| 102 | * on non-static, busybox internal functions. Recent versions of gcc | ||
| 103 | * optimize statics automatically. FAST_FUNC on static is required | ||
| 104 | * only if you need to match a function pointer's type */ | ||
| 105 | #if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */ | ||
| 106 | /* stdcall makes callee to pop arguments from stack, not caller */ | ||
| 107 | # define FAST_FUNC __attribute__((regparm(3),stdcall)) | ||
| 108 | /* #elif ... - add your favorite arch today! */ | ||
| 109 | #else | ||
| 110 | # define FAST_FUNC | ||
| 111 | #endif | ||
| 112 | |||
| 113 | niro | 532 | /* ---- Endian Detection ------------------------------------ */ |
| 114 | |||
| 115 | #if (defined __digital__ && defined __unix__) | ||
| 116 | # include <sex.h> | ||
| 117 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) | ||
| 118 | # define __BYTE_ORDER BYTE_ORDER | ||
| 119 | #elif !defined __APPLE__ | ||
| 120 | # include <byteswap.h> | ||
| 121 | # include <endian.h> | ||
| 122 | #endif | ||
| 123 | |||
| 124 | #ifdef __BIG_ENDIAN__ | ||
| 125 | # define BB_BIG_ENDIAN 1 | ||
| 126 | # define BB_LITTLE_ENDIAN 0 | ||
| 127 | #elif __BYTE_ORDER == __BIG_ENDIAN | ||
| 128 | # define BB_BIG_ENDIAN 1 | ||
| 129 | # define BB_LITTLE_ENDIAN 0 | ||
| 130 | #else | ||
| 131 | # define BB_BIG_ENDIAN 0 | ||
| 132 | # define BB_LITTLE_ENDIAN 1 | ||
| 133 | #endif | ||
| 134 | |||
| 135 | niro | 816 | /* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */ |
| 136 | niro | 532 | #if BB_BIG_ENDIAN |
| 137 | #define SWAP_BE16(x) (x) | ||
| 138 | #define SWAP_BE32(x) (x) | ||
| 139 | #define SWAP_BE64(x) (x) | ||
| 140 | #define SWAP_LE16(x) bswap_16(x) | ||
| 141 | #define SWAP_LE32(x) bswap_32(x) | ||
| 142 | #define SWAP_LE64(x) bswap_64(x) | ||
| 143 | #else | ||
| 144 | #define SWAP_BE16(x) bswap_16(x) | ||
| 145 | #define SWAP_BE32(x) bswap_32(x) | ||
| 146 | #define SWAP_BE64(x) bswap_64(x) | ||
| 147 | #define SWAP_LE16(x) (x) | ||
| 148 | #define SWAP_LE32(x) (x) | ||
| 149 | #define SWAP_LE64(x) (x) | ||
| 150 | #endif | ||
| 151 | |||
| 152 | niro | 816 | /* ---- Unaligned access ------------------------------------ */ |
| 153 | |||
| 154 | /* parameter is supposed to be an uint32_t* ptr */ | ||
| 155 | #if defined(i386) || defined(__x86_64__) | ||
| 156 | #define get_unaligned_u32p(u32p) (*(u32p)) | ||
| 157 | /* #elif ... - add your favorite arch today! */ | ||
| 158 | #else | ||
| 159 | /* performs reasonably well (gcc usually inlines memcpy here) */ | ||
| 160 | #define get_unaligned_u32p(u32p) ({ uint32_t __t; memcpy(&__t, (u32p), 4); __t; }) | ||
| 161 | #endif | ||
| 162 | |||
| 163 | niro | 532 | /* ---- Networking ------------------------------------------ */ |
| 164 | niro | 816 | |
| 165 | niro | 532 | #ifndef __APPLE__ |
| 166 | # include <arpa/inet.h> | ||
| 167 | niro | 816 | # ifndef __socklen_t_defined |
| 168 | typedef int socklen_t; | ||
| 169 | # endif | ||
| 170 | niro | 532 | #else |
| 171 | # include <netinet/in.h> | ||
| 172 | #endif | ||
| 173 | |||
| 174 | niro | 816 | /* ---- Compiler dependent settings ------------------------- */ |
| 175 | niro | 532 | |
| 176 | niro | 816 | #if (defined __digital__ && defined __unix__) || defined __APPLE__ |
| 177 | niro | 532 | # undef HAVE_MNTENT_H |
| 178 | niro | 816 | # undef HAVE_SYS_STATFS_H |
| 179 | niro | 532 | #else |
| 180 | # define HAVE_MNTENT_H 1 | ||
| 181 | niro | 816 | # define HAVE_SYS_STATFS_H 1 |
| 182 | niro | 532 | #endif /* ___digital__ && __unix__ */ |
| 183 | |||
| 184 | niro | 816 | /* linux/loop.h relies on __u64. Make sure we have that as a proper type |
| 185 | * until userspace is widely fixed. */ | ||
| 186 | #if (defined __INTEL_COMPILER && !defined __GNUC__) || \ | ||
| 187 | (defined __GNUC__ && defined __STRICT_ANSI__) | ||
| 188 | __extension__ typedef __signed__ long long __s64; | ||
| 189 | __extension__ typedef unsigned long long __u64; | ||
| 190 | #endif | ||
| 191 | |||
| 192 | niro | 532 | /*----- Kernel versioning ------------------------------------*/ |
| 193 | niro | 816 | |
| 194 | niro | 532 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
| 195 | |||
| 196 | niro | 816 | /* ---- Miscellaneous --------------------------------------- */ |
| 197 | niro | 532 | |
| 198 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ | ||
| 199 | !defined(__dietlibc__) && \ | ||
| 200 | !defined(_NEWLIB_VERSION) && \ | ||
| 201 | !(defined __digital__ && defined __unix__) | ||
| 202 | # error "Sorry, this libc version is not supported :(" | ||
| 203 | #endif | ||
| 204 | |||
| 205 | niro | 816 | /* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */ |
| 206 | niro | 532 | |
| 207 | #if defined __GLIBC__ || defined __UCLIBC__ \ | ||
| 208 | || defined __dietlibc__ || defined _NEWLIB_VERSION | ||
| 209 | #include <features.h> | ||
| 210 | #define HAVE_FEATURES_H | ||
| 211 | #include <stdint.h> | ||
| 212 | #define HAVE_STDINT_H | ||
| 213 | niro | 816 | #elif !defined __APPLE__ |
| 214 | niro | 532 | /* Largest integral types. */ |
| 215 | #if __BIG_ENDIAN__ | ||
| 216 | niro | 816 | typedef long intmax_t; |
| 217 | typedef unsigned long uintmax_t; | ||
| 218 | niro | 532 | #else |
| 219 | __extension__ | ||
| 220 | niro | 816 | typedef long long intmax_t; |
| 221 | niro | 532 | __extension__ |
| 222 | niro | 816 | typedef unsigned long long uintmax_t; |
| 223 | niro | 532 | #endif |
| 224 | #endif | ||
| 225 | |||
| 226 | /* Size-saving "small" ints (arch-dependent) */ | ||
| 227 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) | ||
| 228 | /* add other arches which benefit from this... */ | ||
| 229 | typedef signed char smallint; | ||
| 230 | typedef unsigned char smalluint; | ||
| 231 | #else | ||
| 232 | /* for arches where byte accesses generate larger code: */ | ||
| 233 | typedef int smallint; | ||
| 234 | typedef unsigned smalluint; | ||
| 235 | #endif | ||
| 236 | |||
| 237 | niro | 816 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */ |
| 238 | #if (defined __digital__ && defined __unix__) | ||
| 239 | /* old system without (proper) C99 support */ | ||
| 240 | #define bool smalluint | ||
| 241 | #else | ||
| 242 | /* modern system, so use it */ | ||
| 243 | #include <stdbool.h> | ||
| 244 | #endif | ||
| 245 | |||
| 246 | /* Try to defeat gcc's alignment of "char message[]"-like data */ | ||
| 247 | #if 1 /* if needed: !defined(arch1) && !defined(arch2) */ | ||
| 248 | #define ALIGN1 __attribute__((aligned(1))) | ||
| 249 | #define ALIGN2 __attribute__((aligned(2))) | ||
| 250 | #else | ||
| 251 | /* Arches which MUST have 2 or 4 byte alignment for everything are here */ | ||
| 252 | #define ALIGN1 | ||
| 253 | #define ALIGN2 | ||
| 254 | #endif | ||
| 255 | |||
| 256 | |||
| 257 | niro | 532 | /* uclibc does not implement daemon() for no-mmu systems. |
| 258 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. | ||
| 259 | * For earlier versions there is no reliable way to check if we are building | ||
| 260 | niro | 816 | * for a mmu-less system. |
| 261 | niro | 532 | */ |
| 262 | niro | 816 | #if ENABLE_NOMMU || \ |
| 263 | (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ | ||
| 264 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__) | ||
| 265 | #define BB_MMU 0 | ||
| 266 | #define USE_FOR_NOMMU(...) __VA_ARGS__ | ||
| 267 | #define USE_FOR_MMU(...) | ||
| 268 | #else | ||
| 269 | #define BB_MMU 1 | ||
| 270 | #define USE_FOR_NOMMU(...) | ||
| 271 | #define USE_FOR_MMU(...) __VA_ARGS__ | ||
| 272 | niro | 532 | #endif |
| 273 | |||
| 274 | /* Platforms that haven't got dprintf need to implement fdprintf() in | ||
| 275 | * libbb. This would require a platform.c. It's not going to be cleaned | ||
| 276 | * out of the tree, so stop saying it should be. */ | ||
| 277 | #if !defined(__dietlibc__) | ||
| 278 | /* Needed for: glibc */ | ||
| 279 | /* Not needed for: dietlibc */ | ||
| 280 | /* Others: ?? (add as needed) */ | ||
| 281 | #define fdprintf dprintf | ||
| 282 | #endif | ||
| 283 | |||
| 284 | #if defined(__dietlibc__) | ||
| 285 | niro | 816 | static ALWAYS_INLINE char* strchrnul(const char *s, char c) |
| 286 | { | ||
| 287 | niro | 532 | while (*s && *s != c) ++s; |
| 288 | return (char*)s; | ||
| 289 | } | ||
| 290 | #endif | ||
| 291 | |||
| 292 | niro | 816 | /* Don't use lchown with glibc older than 2.1.x ... uClibc lacks it */ |
| 293 | niro | 532 | #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ |
| 294 | defined __UC_LIBC__ | ||
| 295 | # define lchown chown | ||
| 296 | #endif | ||
| 297 | |||
| 298 | #if (defined __digital__ && defined __unix__) | ||
| 299 | #include <standards.h> | ||
| 300 | #define HAVE_STANDARDS_H | ||
| 301 | #include <inttypes.h> | ||
| 302 | #define HAVE_INTTYPES_H | ||
| 303 | #define PRIu32 "u" | ||
| 304 | |||
| 305 | niro | 816 | /* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */ |
| 306 | #define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0) | ||
| 307 | niro | 532 | |
| 308 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET | ||
| 309 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) | ||
| 310 | #endif | ||
| 311 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY | ||
| 312 | #define ADJ_FREQUENCY MOD_FREQUENCY | ||
| 313 | #endif | ||
| 314 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST | ||
| 315 | #define ADJ_TIMECONST MOD_TIMECONST | ||
| 316 | #endif | ||
| 317 | #if !defined ADJ_TICK && defined MOD_CLKB | ||
| 318 | #define ADJ_TICK MOD_CLKB | ||
| 319 | #endif | ||
| 320 | |||
| 321 | #else | ||
| 322 | niro | 816 | #define bb_setpgrp() setpgrp() |
| 323 | niro | 532 | #endif |
| 324 | |||
| 325 | #if defined(__linux__) | ||
| 326 | #include <sys/mount.h> | ||
| 327 | niro | 816 | /* Make sure we have all the new mount flags we actually try to use. */ |
| 328 | niro | 532 | #ifndef MS_BIND |
| 329 | #define MS_BIND (1<<12) | ||
| 330 | #endif | ||
| 331 | #ifndef MS_MOVE | ||
| 332 | #define MS_MOVE (1<<13) | ||
| 333 | #endif | ||
| 334 | #ifndef MS_RECURSIVE | ||
| 335 | #define MS_RECURSIVE (1<<14) | ||
| 336 | #endif | ||
| 337 | #ifndef MS_SILENT | ||
| 338 | #define MS_SILENT (1<<15) | ||
| 339 | #endif | ||
| 340 | |||
| 341 | niro | 816 | /* The shared subtree stuff, which went in around 2.6.15. */ |
| 342 | niro | 532 | #ifndef MS_UNBINDABLE |
| 343 | #define MS_UNBINDABLE (1<<17) | ||
| 344 | #endif | ||
| 345 | #ifndef MS_PRIVATE | ||
| 346 | #define MS_PRIVATE (1<<18) | ||
| 347 | #endif | ||
| 348 | #ifndef MS_SLAVE | ||
| 349 | #define MS_SLAVE (1<<19) | ||
| 350 | #endif | ||
| 351 | #ifndef MS_SHARED | ||
| 352 | #define MS_SHARED (1<<20) | ||
| 353 | #endif | ||
| 354 | niro | 816 | #ifndef MS_RELATIME |
| 355 | #define MS_RELATIME (1 << 21) | ||
| 356 | #endif | ||
| 357 | niro | 532 | |
| 358 | #if !defined(BLKSSZGET) | ||
| 359 | #define BLKSSZGET _IO(0x12, 104) | ||
| 360 | #endif | ||
| 361 | #if !defined(BLKGETSIZE64) | ||
| 362 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) | ||
| 363 | #endif | ||
| 364 | #endif | ||
| 365 | |||
| 366 | #endif /* platform.h */ |