[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | Copyright 2006, Bernhard Fischer
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| 4 |
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| 5 | Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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| 6 | */
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| 7 | #ifndef __PLATFORM_H
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| 8 | #define __PLATFORM_H 1
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| 9 |
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| 10 | /* Convenience macros to test the version of gcc. */
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| 11 | #undef __GNUC_PREREQ
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| 12 | #if defined __GNUC__ && defined __GNUC_MINOR__
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| 13 | # define __GNUC_PREREQ(maj, min) \
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[1765] | 14 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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[821] | 15 | #else
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| 16 | # define __GNUC_PREREQ(maj, min) 0
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| 17 | #endif
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| 18 |
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| 19 | /* __restrict is known in EGCS 1.2 and above. */
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| 20 | #if !__GNUC_PREREQ (2,92)
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| 21 | # ifndef __restrict
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| 22 | # define __restrict /* Ignore */
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| 23 | # endif
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| 24 | #endif
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| 25 |
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| 26 | /* Define macros for some gcc attributes. This permits us to use the
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| 27 | macros freely, and know that they will come into play for the
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| 28 | version of gcc in which they are supported. */
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| 29 |
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| 30 | #if !__GNUC_PREREQ (2,7)
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| 31 | # ifndef __attribute__
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| 32 | # define __attribute__(x)
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| 33 | # endif
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| 34 | #endif
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| 35 |
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| 36 | #undef inline
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[1765] | 37 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
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[821] | 38 | /* it's a keyword */
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| 39 | #else
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| 40 | # if __GNUC_PREREQ (2,7)
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| 41 | # define inline __inline__
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| 42 | # else
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| 43 | # define inline
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| 44 | # endif
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| 45 | #endif
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| 46 |
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| 47 | #ifndef __const
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| 48 | # define __const const
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| 49 | #endif
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| 50 |
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| 51 | # define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
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| 52 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
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| 53 | # define ATTRIBUTE_PACKED __attribute__ ((__packed__))
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| 54 | # define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
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| 55 | # if __GNUC_PREREQ (3,0)
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[1765] | 56 | # define ALWAYS_INLINE __attribute__ ((always_inline)) inline
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| 57 | # if !ENABLE_WERROR
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| 58 | # define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
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| 59 | # define ATTRIBUTE_UNUSED_RESULT __attribute__ ((warn_unused_result))
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| 60 | # else
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| 61 | # define ATTRIBUTE_DEPRECATED /* n/a */
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| 62 | # define ATTRIBUTE_UNUSED_RESULT /* n/a */
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| 63 | # endif
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[821] | 64 | # else
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[1765] | 65 | # define ALWAYS_INLINE inline
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| 66 | # define ATTRIBUTE_DEPRECATED /* n/a */
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| 67 | # define ATTRIBUTE_UNUSED_RESULT /* n/a */
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[821] | 68 | # endif
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| 69 |
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| 70 | /* -fwhole-program makes all symbols local. The attribute externally_visible
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| 71 | forces a symbol global. */
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| 72 | # if __GNUC_PREREQ (4,1)
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| 73 | # define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
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| 74 | # else
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| 75 | # define ATTRIBUTE_EXTERNALLY_VISIBLE
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| 76 | # endif /* GNUC >= 4.1 */
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| 77 |
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| 78 | /* We use __extension__ in some places to suppress -pedantic warnings
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| 79 | about GCC extensions. This feature didn't work properly before
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| 80 | gcc 2.8. */
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| 81 | #if !__GNUC_PREREQ (2,8)
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| 82 | # ifndef __extension__
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| 83 | # define __extension__
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| 84 | # endif
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| 85 | #endif
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| 86 |
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[902] | 87 | /* gcc-2.95 had no va_copy but only __va_copy. */
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| 88 | #if !__GNUC_PREREQ (3,0)
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| 89 | # include <stdarg.h>
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| 90 | # if !defined va_copy && defined __va_copy
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| 91 | # define va_copy(d,s) __va_copy((d),(s))
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| 92 | # endif
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| 93 | #endif
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| 94 |
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[821] | 95 | /* ---- Endian Detection ------------------------------------ */
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| 96 |
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| 97 | #if (defined __digital__ && defined __unix__)
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| 98 | # include <sex.h>
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| 99 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
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| 100 | # define __BYTE_ORDER BYTE_ORDER
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| 101 | #elif !defined __APPLE__
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| 102 | # include <byteswap.h>
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| 103 | # include <endian.h>
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| 104 | #endif
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| 105 |
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| 106 | #ifdef __BIG_ENDIAN__
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| 107 | # define BB_BIG_ENDIAN 1
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| 108 | # define BB_LITTLE_ENDIAN 0
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| 109 | #elif __BYTE_ORDER == __BIG_ENDIAN
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| 110 | # define BB_BIG_ENDIAN 1
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| 111 | # define BB_LITTLE_ENDIAN 0
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| 112 | #else
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| 113 | # define BB_BIG_ENDIAN 0
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| 114 | # define BB_LITTLE_ENDIAN 1
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| 115 | #endif
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| 116 |
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| 117 | #if BB_BIG_ENDIAN
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| 118 | #define SWAP_BE16(x) (x)
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| 119 | #define SWAP_BE32(x) (x)
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| 120 | #define SWAP_BE64(x) (x)
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| 121 | #define SWAP_LE16(x) bswap_16(x)
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| 122 | #define SWAP_LE32(x) bswap_32(x)
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| 123 | #define SWAP_LE64(x) bswap_64(x)
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| 124 | #else
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| 125 | #define SWAP_BE16(x) bswap_16(x)
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| 126 | #define SWAP_BE32(x) bswap_32(x)
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| 127 | #define SWAP_BE64(x) bswap_64(x)
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| 128 | #define SWAP_LE16(x) (x)
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| 129 | #define SWAP_LE32(x) (x)
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| 130 | #define SWAP_LE64(x) (x)
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| 131 | #endif
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| 132 |
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| 133 | /* ---- Networking ------------------------------------------ */
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| 134 | #ifndef __APPLE__
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| 135 | # include <arpa/inet.h>
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| 136 | #else
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| 137 | # include <netinet/in.h>
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| 138 | #endif
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| 139 |
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| 140 | #ifndef __socklen_t_defined
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| 141 | typedef int socklen_t;
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| 142 | #endif
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| 143 |
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| 144 | /* ---- Compiler dependent settings ------------------------- */
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[1765] | 145 | #if (defined __digital__ && defined __unix__)
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| 146 | # undef HAVE_MNTENT_H
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| 147 | #else
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| 148 | # define HAVE_MNTENT_H 1
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| 149 | #endif /* ___digital__ && __unix__ */
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| 150 |
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| 151 | /* linux/loop.h relies on __u64. Make sure we have that as a proper type
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| 152 | * until userspace is widely fixed. */
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[821] | 153 | #ifndef __GNUC__
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| 154 | #if defined __INTEL_COMPILER
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| 155 | __extension__ typedef __signed__ long long __s64;
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| 156 | __extension__ typedef unsigned long long __u64;
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| 157 | #endif /* __INTEL_COMPILER */
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| 158 | #endif /* ifndef __GNUC__ */
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| 159 |
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| 160 | /*----- Kernel versioning ------------------------------------*/
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| 161 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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| 162 |
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| 163 | /* ---- miscellaneous --------------------------------------- */
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| 164 |
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| 165 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
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| 166 | !defined(__dietlibc__) && \
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| 167 | !defined(_NEWLIB_VERSION) && \
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| 168 | !(defined __digital__ && defined __unix__)
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| 169 | # error "Sorry, this libc version is not supported :("
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| 170 | #endif
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| 171 |
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[1765] | 172 | /* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */
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[821] | 173 |
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| 174 | #if defined __GLIBC__ || defined __UCLIBC__ \
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| 175 | || defined __dietlibc__ || defined _NEWLIB_VERSION
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| 176 | #include <features.h>
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| 177 | #define HAVE_FEATURES_H
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| 178 | #include <stdint.h>
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| 179 | #define HAVE_STDINT_H
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| 180 | #else
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| 181 | /* Largest integral types. */
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| 182 | #if __BIG_ENDIAN__
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[1765] | 183 | typedef long intmax_t;
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| 184 | typedef unsigned long uintmax_t;
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[821] | 185 | #else
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| 186 | __extension__
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[1765] | 187 | typedef long long intmax_t;
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[821] | 188 | __extension__
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[1765] | 189 | typedef unsigned long long uintmax_t;
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[821] | 190 | #endif
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| 191 | #endif
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| 192 |
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[1765] | 193 | /* Size-saving "small" ints (arch-dependent) */
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| 194 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
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| 195 | /* add other arches which benefit from this... */
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| 196 | typedef signed char smallint;
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| 197 | typedef unsigned char smalluint;
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| 198 | #else
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| 199 | /* for arches where byte accesses generate larger code: */
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| 200 | typedef int smallint;
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| 201 | typedef unsigned smalluint;
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| 202 | #endif
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| 203 |
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| 204 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
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| 205 | #if (defined __digital__ && defined __unix__)
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| 206 | /* old system without (proper) C99 support */
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| 207 | #define bool smalluint
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| 208 | #else
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| 209 | /* modern system, so use it */
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| 210 | #include <stdbool.h>
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| 211 | #endif
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| 212 |
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| 213 | /* Try to defeat gcc's alignment of "char message[]"-like data */
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| 214 | #if 1 /* if needed: !defined(arch1) && !defined(arch2) */
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| 215 | #define ALIGN1 __attribute__((aligned(1)))
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| 216 | #define ALIGN2 __attribute__((aligned(2)))
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| 217 | #else
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| 218 | /* Arches which MUST have 2 or 4 byte alignment for everything are here */
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| 219 | #define ALIGN1
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| 220 | #define ALIGN2
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| 221 | #endif
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| 222 |
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| 223 |
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| 224 | /* uclibc does not implement daemon() for no-mmu systems.
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[821] | 225 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
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| 226 | * For earlier versions there is no reliable way to check if we are building
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| 227 | * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
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| 228 | * on his own.
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| 229 | */
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| 230 | #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
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| 231 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
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[1765] | 232 | #define BB_MMU 0
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| 233 | #define BB_NOMMU 1
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| 234 | #define USE_FOR_NOMMU(...) __VA_ARGS__
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| 235 | #define USE_FOR_MMU(...)
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| 236 | #else
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| 237 | #define BB_MMU 1
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| 238 | /* BB_NOMMU is not defined in this case! */
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| 239 | #define USE_FOR_NOMMU(...)
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| 240 | #define USE_FOR_MMU(...) __VA_ARGS__
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[821] | 241 | #endif
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| 242 |
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| 243 | /* Platforms that haven't got dprintf need to implement fdprintf() in
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| 244 | * libbb. This would require a platform.c. It's not going to be cleaned
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| 245 | * out of the tree, so stop saying it should be. */
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[1765] | 246 | #if !defined(__dietlibc__)
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| 247 | /* Needed for: glibc */
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| 248 | /* Not needed for: dietlibc */
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| 249 | /* Others: ?? (add as needed) */
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[821] | 250 | #define fdprintf dprintf
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[1765] | 251 | #endif
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[821] | 252 |
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[1765] | 253 | #if defined(__dietlibc__)
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| 254 | static ALWAYS_INLINE char* strchrnul(const char *s, char c)
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| 255 | {
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| 256 | while (*s && *s != c) ++s;
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| 257 | return (char*)s;
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| 258 | }
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| 259 | #endif
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| 260 |
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| 261 | /* Don't use lchown with glibc older than 2.1.x ... uClibc lacks it */
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| 262 | #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
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| 263 | defined __UC_LIBC__
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| 264 | # define lchown chown
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| 265 | #endif
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| 266 |
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[821] | 267 | /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
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| 268 | /* FIXME: fix tar.c! */
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| 269 | #ifndef FNM_LEADING_DIR
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| 270 | #define FNM_LEADING_DIR 0
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| 271 | #endif
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| 272 |
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| 273 | #if (defined __digital__ && defined __unix__)
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| 274 | #include <standards.h>
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| 275 | #define HAVE_STANDARDS_H
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| 276 | #include <inttypes.h>
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| 277 | #define HAVE_INTTYPES_H
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| 278 | #define PRIu32 "u"
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| 279 |
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[1765] | 280 | /* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */
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| 281 | #define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0)
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[821] | 282 |
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| 283 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
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| 284 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
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| 285 | #endif
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| 286 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
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| 287 | #define ADJ_FREQUENCY MOD_FREQUENCY
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| 288 | #endif
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| 289 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST
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| 290 | #define ADJ_TIMECONST MOD_TIMECONST
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| 291 | #endif
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| 292 | #if !defined ADJ_TICK && defined MOD_CLKB
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| 293 | #define ADJ_TICK MOD_CLKB
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| 294 | #endif
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| 295 |
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| 296 | #else
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[1765] | 297 | #define bb_setpgrp() setpgrp()
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[821] | 298 | #endif
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| 299 |
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| 300 | #if defined(__linux__)
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| 301 | #include <sys/mount.h>
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[1765] | 302 | /* Make sure we have all the new mount flags we actually try to use. */
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| 303 | #ifndef MS_BIND
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| 304 | #define MS_BIND (1<<12)
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| 305 | #endif
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| 306 | #ifndef MS_MOVE
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| 307 | #define MS_MOVE (1<<13)
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| 308 | #endif
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| 309 | #ifndef MS_RECURSIVE
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| 310 | #define MS_RECURSIVE (1<<14)
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| 311 | #endif
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| 312 | #ifndef MS_SILENT
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| 313 | #define MS_SILENT (1<<15)
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| 314 | #endif
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| 315 |
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| 316 | /* The shared subtree stuff, which went in around 2.6.15. */
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| 317 | #ifndef MS_UNBINDABLE
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| 318 | #define MS_UNBINDABLE (1<<17)
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| 319 | #endif
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| 320 | #ifndef MS_PRIVATE
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| 321 | #define MS_PRIVATE (1<<18)
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| 322 | #endif
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| 323 | #ifndef MS_SLAVE
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| 324 | #define MS_SLAVE (1<<19)
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| 325 | #endif
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| 326 | #ifndef MS_SHARED
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| 327 | #define MS_SHARED (1<<20)
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| 328 | #endif
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| 329 |
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| 330 |
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[821] | 331 | #if !defined(BLKSSZGET)
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| 332 | #define BLKSSZGET _IO(0x12, 104)
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| 333 | #endif
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| 334 | #if !defined(BLKGETSIZE64)
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| 335 | #define BLKGETSIZE64 _IOR(0x12,114,size_t)
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| 336 | #endif
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| 337 | #endif
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| 338 |
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| 339 | #endif /* platform.h */
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