Bernhard Reutner-Fischer | b1629b1 | 2006-05-19 19:29:19 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 2 | /* |
| 3 | Copyright 2006, Bernhard Fischer |
| 4 | |
| 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) \ |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 14 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 15 | #else |
| 16 | # define __GNUC_PREREQ(maj, min) 0 |
| 17 | #endif |
| 18 | |
| 19 | /* __restrict is known in EGCS 1.2 and above. */ |
| 20 | #if !__GNUC_PREREQ (2,92) |
| 21 | # 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 | #if !__GNUC_PREREQ (2,7) |
| 31 | # ifndef __attribute__ |
| 32 | # define __attribute__(x) |
| 33 | # endif |
| 34 | #endif |
| 35 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 36 | #undef inline |
Denis Vlasenko | a7189f0 | 2006-11-17 20:29:00 +0000 | [diff] [blame] | 37 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 38 | /* it's a keyword */ |
| 39 | #else |
| 40 | # if __GNUC_PREREQ (2,7) |
| 41 | # define inline __inline__ |
| 42 | # else |
| 43 | # define inline |
| 44 | # endif |
| 45 | #endif |
| 46 | |
| 47 | #ifndef __const |
| 48 | # define __const const |
| 49 | #endif |
| 50 | |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 51 | # define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 52 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 53 | # define ATTRIBUTE_PACKED __attribute__ ((__packed__)) |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 54 | # define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m))) |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 55 | # if __GNUC_PREREQ (3,0) |
| 56 | # define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline |
| 57 | # else |
| 58 | # define ATTRIBUTE_ALWAYS_INLINE inline |
| 59 | # endif |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 60 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 61 | /* -fwhole-program makes all symbols local. The attribute externally_visible |
| 62 | forces a symbol global. */ |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 63 | # if __GNUC_PREREQ (4,1) |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 64 | # define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__)) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 65 | # else |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 66 | # define ATTRIBUTE_EXTERNALLY_VISIBLE |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 67 | # endif /* GNUC >= 4.1 */ |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 68 | |
| 69 | /* We use __extension__ in some places to suppress -pedantic warnings |
| 70 | about GCC extensions. This feature didn't work properly before |
| 71 | gcc 2.8. */ |
| 72 | #if !__GNUC_PREREQ (2,8) |
| 73 | # ifndef __extension__ |
| 74 | # define __extension__ |
| 75 | # endif |
| 76 | #endif |
| 77 | |
Bernhard Reutner-Fischer | b5f50ea | 2006-09-12 13:27:55 +0000 | [diff] [blame] | 78 | /* gcc-2.95 had no va_copy but only __va_copy. */ |
| 79 | #if !__GNUC_PREREQ (3,0) |
| 80 | # include <stdarg.h> |
| 81 | # if !defined va_copy && defined __va_copy |
| 82 | # define va_copy(d,s) __va_copy((d),(s)) |
| 83 | # endif |
| 84 | #endif |
| 85 | |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 86 | /* ---- Endian Detection ------------------------------------ */ |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 87 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 88 | #if (defined __digital__ && defined __unix__) |
| 89 | # include <sex.h> |
| 90 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) |
| 91 | # define __BYTE_ORDER BYTE_ORDER |
Rob Landley | 15d20a0 | 2006-05-29 05:00:44 +0000 | [diff] [blame] | 92 | #elif !defined __APPLE__ |
| 93 | # include <byteswap.h> |
| 94 | # include <endian.h> |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 95 | #endif |
| 96 | |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 97 | #ifdef __BIG_ENDIAN__ |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 98 | # define BB_BIG_ENDIAN 1 |
| 99 | # define BB_LITTLE_ENDIAN 0 |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 100 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 101 | # define BB_BIG_ENDIAN 1 |
| 102 | # define BB_LITTLE_ENDIAN 0 |
Bernhard Reutner-Fischer | ed7bb62 | 2006-02-23 14:25:15 +0000 | [diff] [blame] | 103 | #else |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 104 | # define BB_BIG_ENDIAN 0 |
| 105 | # define BB_LITTLE_ENDIAN 1 |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 106 | #endif |
| 107 | |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 108 | #if BB_BIG_ENDIAN |
Rob Landley | 752f0a6 | 2006-05-30 06:28:03 +0000 | [diff] [blame] | 109 | #define SWAP_BE16(x) (x) |
| 110 | #define SWAP_BE32(x) (x) |
| 111 | #define SWAP_BE64(x) (x) |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 112 | #define SWAP_LE16(x) bswap_16(x) |
| 113 | #define SWAP_LE32(x) bswap_32(x) |
| 114 | #define SWAP_LE64(x) bswap_64(x) |
| 115 | #else |
| 116 | #define SWAP_BE16(x) bswap_16(x) |
| 117 | #define SWAP_BE32(x) bswap_32(x) |
| 118 | #define SWAP_BE64(x) bswap_64(x) |
Rob Landley | 752f0a6 | 2006-05-30 06:28:03 +0000 | [diff] [blame] | 119 | #define SWAP_LE16(x) (x) |
| 120 | #define SWAP_LE32(x) (x) |
| 121 | #define SWAP_LE64(x) (x) |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 122 | #endif |
| 123 | |
Rob Landley | dae6aa2 | 2006-03-09 22:39:08 +0000 | [diff] [blame] | 124 | /* ---- Networking ------------------------------------------ */ |
| 125 | #ifndef __APPLE__ |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 126 | # include <arpa/inet.h> |
Rob Landley | dae6aa2 | 2006-03-09 22:39:08 +0000 | [diff] [blame] | 127 | #else |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 128 | # include <netinet/in.h> |
Rob Landley | dae6aa2 | 2006-03-09 22:39:08 +0000 | [diff] [blame] | 129 | #endif |
| 130 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 131 | #ifndef __socklen_t_defined |
| 132 | typedef int socklen_t; |
| 133 | #endif |
| 134 | |
| 135 | /* ---- Compiler dependent settings ------------------------- */ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 136 | #if (defined __digital__ && defined __unix__) |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 137 | # undef HAVE_MNTENT_H |
| 138 | #else |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 139 | # define HAVE_MNTENT_H 1 |
| 140 | #endif /* ___digital__ && __unix__ */ |
| 141 | |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 142 | /*----- Kernel versioning ------------------------------------*/ |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 143 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 144 | |
Bernhard Reutner-Fischer | ed7bb62 | 2006-02-23 14:25:15 +0000 | [diff] [blame] | 145 | /* ---- miscellaneous --------------------------------------- */ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 146 | |
Mike Frysinger | b16b5bb | 2006-06-06 06:00:20 +0000 | [diff] [blame] | 147 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 148 | !defined(__dietlibc__) && \ |
| 149 | !defined(_NEWLIB_VERSION) && \ |
| 150 | !(defined __digital__ && defined __unix__) |
Mike Frysinger | b16b5bb | 2006-06-06 06:00:20 +0000 | [diff] [blame] | 151 | # error "Sorry, this libc version is not supported :(" |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 152 | #endif |
| 153 | |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 154 | // Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. |
| 155 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 156 | #if defined __GLIBC__ || defined __UCLIBC__ \ |
| 157 | || defined __dietlibc__ || defined _NEWLIB_VERSION |
| 158 | #include <features.h> |
| 159 | #define HAVE_FEATURES_H |
| 160 | #include <stdint.h> |
| 161 | #define HAVE_STDINT_H |
| 162 | #else |
| 163 | /* Largest integral types. */ |
| 164 | #if __BIG_ENDIAN__ |
| 165 | typedef long int intmax_t; |
| 166 | typedef unsigned long int uintmax_t; |
| 167 | #else |
| 168 | __extension__ |
| 169 | typedef long long int intmax_t; |
| 170 | __extension__ |
| 171 | typedef unsigned long long int uintmax_t; |
| 172 | #endif |
| 173 | #endif |
| 174 | |
Bernhard Reutner-Fischer | c966ba4 | 2007-01-18 10:32:09 +0000 | [diff] [blame] | 175 | /* Size-saving "small" ints (arch-dependent) */ |
| 176 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) |
| 177 | /* add other arches which benefit from this... */ |
| 178 | typedef signed char smallint; |
| 179 | typedef unsigned char smalluint; |
| 180 | #else |
| 181 | /* for arches where byte accesses generate larger code: */ |
| 182 | typedef int smallint; |
| 183 | typedef unsigned smalluint; |
| 184 | #endif |
| 185 | |
Bernhard Reutner-Fischer | a8e2e18 | 2007-01-20 21:27:18 +0000 | [diff] [blame] | 186 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */ |
| 187 | #if (defined __digital__ && defined __unix__) |
| 188 | /* old system without (proper) C99 support */ |
| 189 | #define bool smalluint |
| 190 | #else |
| 191 | /* modern system, so use it */ |
| 192 | #include <stdbool.h> |
| 193 | #endif |
| 194 | |
| 195 | |
Mike Frysinger | 8840759 | 2006-07-20 19:31:07 +0000 | [diff] [blame] | 196 | /* uclibc does not implement daemon() for no-mmu systems. |
Bernhard Reutner-Fischer | 507cd75 | 2006-05-31 10:04:03 +0000 | [diff] [blame] | 197 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. |
| 198 | * For earlier versions there is no reliable way to check if we are building |
Rob Landley | 1fa4a94 | 2006-06-22 22:05:00 +0000 | [diff] [blame] | 199 | * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU" |
Bernhard Reutner-Fischer | 507cd75 | 2006-05-31 10:04:03 +0000 | [diff] [blame] | 200 | * on his own. |
| 201 | */ |
| 202 | #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ |
| 203 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__ |
| 204 | #define BB_NOMMU |
| 205 | #endif |
| 206 | |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 207 | /* Platforms that haven't got dprintf need to implement fdprintf() in |
| 208 | * libbb. This would require a platform.c. It's not going to be cleaned |
| 209 | * out of the tree, so stop saying it should be. */ |
Denis Vlasenko | 7cfecc4 | 2006-12-18 22:32:45 +0000 | [diff] [blame] | 210 | #if !defined(__dietlibc__) |
| 211 | /* Needed for: glibc */ |
| 212 | /* Not needed for: dietlibc */ |
| 213 | /* Others: ?? (add as needed) */ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 214 | #define fdprintf dprintf |
Denis Vlasenko | 7cfecc4 | 2006-12-18 22:32:45 +0000 | [diff] [blame] | 215 | #endif |
| 216 | |
| 217 | #if defined(__dietlibc__) |
| 218 | static ATTRIBUTE_ALWAYS_INLINE char* strchrnul(const char *s, char c) { |
| 219 | while (*s && *s != c) ++s; |
| 220 | return (char*)s; |
| 221 | } |
Denis Vlasenko | c8e6e35 | 2006-12-18 22:10:24 +0000 | [diff] [blame] | 222 | #endif |
Rob Landley | c020f5f | 2006-05-21 18:28:13 +0000 | [diff] [blame] | 223 | |
Denis Vlasenko | a597aad | 2006-12-16 23:48:13 +0000 | [diff] [blame] | 224 | /* Don't use lchown with glibc older than 2.1.x ... uC-libc lacks it */ |
Mike Frysinger | 8840759 | 2006-07-20 19:31:07 +0000 | [diff] [blame] | 225 | #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ |
| 226 | defined __UC_LIBC__ |
| 227 | # define lchown chown |
| 228 | #endif |
| 229 | |
Bernhard Reutner-Fischer | 4ed1f1d | 2006-05-26 13:34:25 +0000 | [diff] [blame] | 230 | /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */ |
| 231 | /* FIXME: fix tar.c! */ |
| 232 | #ifndef FNM_LEADING_DIR |
| 233 | #define FNM_LEADING_DIR 0 |
| 234 | #endif |
| 235 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 236 | #if (defined __digital__ && defined __unix__) |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 237 | #include <standards.h> |
| 238 | #define HAVE_STANDARDS_H |
| 239 | #include <inttypes.h> |
| 240 | #define HAVE_INTTYPES_H |
| 241 | #define PRIu32 "u" |
Rob Landley | 8fba99f | 2006-05-27 22:08:01 +0000 | [diff] [blame] | 242 | |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 243 | /* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */ |
Denis Vlasenko | bf0a201 | 2006-12-26 10:42:51 +0000 | [diff] [blame] | 244 | #define bb_setpgrp do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0) |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 245 | |
Rob Landley | 8fba99f | 2006-05-27 22:08:01 +0000 | [diff] [blame] | 246 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET |
| 247 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) |
| 248 | #endif |
| 249 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY |
| 250 | #define ADJ_FREQUENCY MOD_FREQUENCY |
| 251 | #endif |
| 252 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST |
| 253 | #define ADJ_TIMECONST MOD_TIMECONST |
| 254 | #endif |
| 255 | #if !defined ADJ_TICK && defined MOD_CLKB |
| 256 | #define ADJ_TICK MOD_CLKB |
| 257 | #endif |
| 258 | |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 259 | #else |
| 260 | #define bb_setpgrp setpgrp() |
| 261 | #endif |
| 262 | |
Rob Landley | 22d26fc | 2006-06-15 15:49:36 +0000 | [diff] [blame] | 263 | #if defined(__linux__) |
| 264 | #include <sys/mount.h> |
Rob Landley | e3781b7 | 2006-08-08 01:39:49 +0000 | [diff] [blame] | 265 | // Make sure we have all the new mount flags we actually try to use. |
| 266 | #ifndef MS_BIND |
| 267 | #define MS_BIND (1<<12) |
| 268 | #endif |
| 269 | #ifndef MS_MOVE |
| 270 | #define MS_MOVE (1<<13) |
| 271 | #endif |
| 272 | #ifndef MS_RECURSIVE |
| 273 | #define MS_RECURSIVE (1<<14) |
| 274 | #endif |
| 275 | #ifndef MS_SILENT |
| 276 | #define MS_SILENT (1<<15) |
| 277 | #endif |
| 278 | |
| 279 | // The shared subtree stuff, which went in around 2.6.15 |
| 280 | #ifndef MS_UNBINDABLE |
| 281 | #define MS_UNBINDABLE (1<<17) |
| 282 | #endif |
| 283 | #ifndef MS_PRIVATE |
| 284 | #define MS_PRIVATE (1<<18) |
| 285 | #endif |
| 286 | #ifndef MS_SLAVE |
| 287 | #define MS_SLAVE (1<<19) |
| 288 | #endif |
| 289 | #ifndef MS_SHARED |
| 290 | #define MS_SHARED (1<<20) |
| 291 | #endif |
| 292 | |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 293 | |
Rob Landley | 7077ea3 | 2006-06-29 19:00:12 +0000 | [diff] [blame] | 294 | #if !defined(BLKSSZGET) |
| 295 | #define BLKSSZGET _IO(0x12, 104) |
| 296 | #endif |
Rob Landley | 22d26fc | 2006-06-15 15:49:36 +0000 | [diff] [blame] | 297 | #if !defined(BLKGETSIZE64) |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 298 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
| 299 | #endif |
Rob Landley | 22d26fc | 2006-06-15 15:49:36 +0000 | [diff] [blame] | 300 | #endif |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 301 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 302 | #endif /* platform.h */ |