include/compiler.h

   1 /*
   2  * Keep all the ugly #ifdef for system stuff here
   3  */
   4
   5 #ifndef __COMPILER_H__
   6 #define __COMPILER_H__
   7
   8 #include <stddef.h>
   9 #include <stdbool.h>
  10
  11 #ifdef USE_HOSTCC
  12
  13 #if defined(__BEOS__)    || \
  14     defined(__NetBSD__)  || \
  15     defined(__FreeBSD__) || \
  16     defined(__sun__)     || \
  17     defined(__APPLE__)
  18 # include <inttypes.h>
  19 #elif defined(__linux__) || defined(__WIN32__) || defined(__MINGW32__) || defined(__OpenBSD__)
  20 # include <stdint.h>
  21 #endif
  22
  23 #include <errno.h>
  24 #include <stdlib.h>
  25 #include <stdint.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 #if !defined(__WIN32__) && !defined(__MINGW32__)
  30 # include <sys/mman.h>
  31 #endif
  32
  33 /* Not all systems (like Windows) has this define, and yes
  34  * we do replace/emulate mmap() on those systems ...
  35  */
  36 #ifndef MAP_FAILED
  37 # define MAP_FAILED ((void *)-1)
  38 #endif
  39
  40 #include <fcntl.h>
  41 #ifndef O_BINARY                /* should be define'd on __WIN32__ */
  42 #define O_BINARY        0
  43 #endif
  44
  45 #ifdef __linux__
  46 # include <endian.h>
  47 # include <byteswap.h>
  48 #elif defined(__MACH__) || defined(__FreeBSD__)
  49 # include <machine/endian.h>
  50 #endif
  51 #ifdef __FreeBSD__
  52 # include <sys/endian.h> /* htole32 and friends */
  53 # define __BYTE_ORDER BYTE_ORDER
  54 # define __LITTLE_ENDIAN LITTLE_ENDIAN
  55 # define __BIG_ENDIAN BIG_ENDIAN
  56 #elif defined(__OpenBSD__)
  57 # include <endian.h>
  58 # define __BYTE_ORDER BYTE_ORDER
  59 # define __LITTLE_ENDIAN LITTLE_ENDIAN
  60 # define __BIG_ENDIAN BIG_ENDIAN
  61 #endif
  62
  63 #include <time.h>
  64
  65 typedef uint8_t __u8;
  66 typedef uint16_t __u16;
  67 typedef uint32_t __u32;
  68 typedef unsigned int uint;
  69 typedef unsigned long ulong;
  70
  71 /* Define these on the host so we can build some target code */
  72 typedef __u32 u32;
  73
  74 #define uswap_16(x) \
  75         ((((x) & 0xff00) >> 8) | \
  76          (((x) & 0x00ff) << 8))
  77 #define uswap_32(x) \
  78         ((((x) & 0xff000000) >> 24) | \
  79          (((x) & 0x00ff0000) >>  8) | \
  80          (((x) & 0x0000ff00) <<  8) | \
  81          (((x) & 0x000000ff) << 24))
  82 #define _uswap_64(x, sfx) \
  83         ((((x) & 0xff00000000000000##sfx) >> 56) | \
  84          (((x) & 0x00ff000000000000##sfx) >> 40) | \
  85          (((x) & 0x0000ff0000000000##sfx) >> 24) | \
  86          (((x) & 0x000000ff00000000##sfx) >>  8) | \
  87          (((x) & 0x00000000ff000000##sfx) <<  8) | \
  88          (((x) & 0x0000000000ff0000##sfx) << 24) | \
  89          (((x) & 0x000000000000ff00##sfx) << 40) | \
  90          (((x) & 0x00000000000000ff##sfx) << 56))
  91 #if defined(__GNUC__)
  92 # define uswap_64(x) _uswap_64(x, ull)
  93 #else
  94 # define uswap_64(x) _uswap_64(x, )
  95 #endif
  96
  97 #if __BYTE_ORDER == __LITTLE_ENDIAN
  98 # define cpu_to_le16(x)         (x)
  99 # define cpu_to_le32(x)         (x)
 100 # define cpu_to_le64(x)         (x)
 101 # define le16_to_cpu(x)         (x)
 102 # define le32_to_cpu(x)         (x)
 103 # define le64_to_cpu(x)         (x)
 104 # define cpu_to_be16(x)         uswap_16(x)
 105 # define cpu_to_be32(x)         uswap_32(x)
 106 # define cpu_to_be64(x)         uswap_64(x)
 107 # define be16_to_cpu(x)         uswap_16(x)
 108 # define be32_to_cpu(x)         uswap_32(x)
 109 # define be64_to_cpu(x)         uswap_64(x)
 110 #else
 111 # define cpu_to_le16(x)         uswap_16(x)
 112 # define cpu_to_le32(x)         uswap_32(x)
 113 # define cpu_to_le64(x)         uswap_64(x)
 114 # define le16_to_cpu(x)         uswap_16(x)
 115 # define le32_to_cpu(x)         uswap_32(x)
 116 # define le64_to_cpu(x)         uswap_64(x)
 117 # define cpu_to_be16(x)         (x)
 118 # define cpu_to_be32(x)         (x)
 119 # define cpu_to_be64(x)         (x)
 120 # define be16_to_cpu(x)         (x)
 121 # define be32_to_cpu(x)         (x)
 122 # define be64_to_cpu(x)         (x)
 123 #endif
 124
 125 #else /* !USE_HOSTCC */
 126
 127 /* Type for `void *' pointers. */
 128 typedef unsigned long int uintptr_t;
 129
 130 #include <linux/string.h>
 131 #include <linux/types.h>
 132 #include <asm/byteorder.h>
 133
 134 #if __SIZEOF_LONG__ == 8
 135 # define __WORDSIZE     64
 136 #elif __SIZEOF_LONG__ == 4
 137 # define __WORDSIZE     32
 138 #else
 139 /*
 140  * Assume 32-bit for now - only newer toolchains support this feature and
 141  * this is only required for sandbox support at present.
 142  */
 143 #define __WORDSIZE      32
 144 #endif
 145
 146 #endif /* USE_HOSTCC */
 147
 148 #define likely(x)       __builtin_expect(!!(x), 1)
 149 #define unlikely(x)     __builtin_expect(!!(x), 0)
 150
 151 #ifdef __LP64__
 152 #define MEM_SUPPORT_64BIT_DATA  1
 153 #else
 154 #define MEM_SUPPORT_64BIT_DATA  0
 155 #endif
 156
 157 /**
 158  * tools_build() - check if we are building host tools
 159  *
 160  * Return: true if building for the host, false if for a target
 161  */
 162 static inline bool tools_build(void)
 163 {
 164 #ifdef USE_HOSTCC
 165         return true;
 166 #else
 167         return false;
 168 #endif
 169 }
 170
 171 #endif