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 | /* |
Bernhard Reutner-Fischer | 6c4dade | 2008-09-25 12:13:34 +0000 | [diff] [blame] | 3 | Copyright 2006, Bernhard Reutner-Fischer |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 4 | |
| 5 | Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
| 6 | */ |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 7 | #ifndef BB_PLATFORM_H |
| 8 | #define BB_PLATFORM_H 1 |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 9 | |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 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 |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 14 | #define HAVE_MEMRCHR 1 |
| 15 | #define HAVE_MKDTEMP 1 |
| 16 | #define HAVE_SETBIT 1 |
| 17 | #define HAVE_STRCASESTR 1 |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 18 | #define HAVE_STRCHRNUL 1 |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 19 | #define HAVE_STRSIGNAL 1 |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 20 | #define HAVE_VASPRINTF 1 |
| 21 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 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) \ |
Denis Vlasenko | 9213a9e | 2006-09-17 16:28:10 +0000 | [diff] [blame] | 26 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 27 | #else |
| 28 | # define __GNUC_PREREQ(maj, min) 0 |
| 29 | #endif |
| 30 | |
| 31 | /* __restrict is known in EGCS 1.2 and above. */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 32 | #if !__GNUC_PREREQ(2,92) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 33 | # ifndef __restrict |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 34 | # define __restrict |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 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 | |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 42 | #if !__GNUC_PREREQ(2,7) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 43 | # ifndef __attribute__ |
| 44 | # define __attribute__(x) |
| 45 | # endif |
| 46 | #endif |
| 47 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 48 | #undef inline |
Denis Vlasenko | a7189f0 | 2006-11-17 20:29:00 +0000 | [diff] [blame] | 49 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 50 | /* it's a keyword */ |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 51 | #elif __GNUC_PREREQ(2,7) |
| 52 | # define inline __inline__ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 53 | #else |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 54 | # define inline |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 55 | #endif |
| 56 | |
| 57 | #ifndef __const |
| 58 | # define __const const |
| 59 | #endif |
| 60 | |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 61 | #define UNUSED_PARAM __attribute__ ((__unused__)) |
| 62 | #define NORETURN __attribute__ ((__noreturn__)) |
Denys Vlasenko | 53283ad | 2009-11-02 14:20:34 +0100 | [diff] [blame] | 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)) |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 72 | #define PACKED __attribute__ ((__packed__)) |
| 73 | #define ALIGNED(m) __attribute__ ((__aligned__(m))) |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 74 | |
Denis Vlasenko | 0f3a580 | 2008-03-20 13:13:09 +0000 | [diff] [blame] | 75 | /* __NO_INLINE__: some gcc's do not honor inlining! :( */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 76 | #if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__) |
| 77 | # define ALWAYS_INLINE __attribute__ ((always_inline)) inline |
Denis Vlasenko | 77f1ec1 | 2007-10-13 03:36:03 +0000 | [diff] [blame] | 78 | /* I've seen a toolchain where I needed __noinline__ instead of noinline */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 79 | # define NOINLINE __attribute__((__noinline__)) |
| 80 | # if !ENABLE_WERROR |
Denis Vlasenko | a60f84e | 2008-07-05 09:18:54 +0000 | [diff] [blame] | 81 | # define DEPRECATED __attribute__ ((__deprecated__)) |
| 82 | # define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result)) |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 83 | # else |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 84 | # define DEPRECATED |
| 85 | # define UNUSED_PARAM_RESULT |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 86 | # endif |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 87 | #else |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 88 | # define ALWAYS_INLINE inline |
| 89 | # define NOINLINE |
| 90 | # define DEPRECATED |
| 91 | # define UNUSED_PARAM_RESULT |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 92 | #endif |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 93 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 94 | /* -fwhole-program makes all symbols local. The attribute externally_visible |
| 95 | forces a symbol global. */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 96 | #if __GNUC_PREREQ(4,1) |
| 97 | # define EXTERNALLY_VISIBLE __attribute__(( visibility("default") )) |
Denis Vlasenko | 9b49a5e | 2007-10-11 10:05:36 +0000 | [diff] [blame] | 98 | //__attribute__ ((__externally_visible__)) |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 99 | #else |
| 100 | # define EXTERNALLY_VISIBLE |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 101 | #endif |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 102 | |
Denys Vlasenko | 98a4c7c | 2010-02-04 15:00:15 +0100 | [diff] [blame] | 103 | /* At 4.4 gcc become much more anal about this, need to use "aliased" types */ |
| 104 | #if __GNUC_PREREQ(4,4) |
| 105 | # define FIX_ALIASING __attribute__((__may_alias__)) |
| 106 | #else |
| 107 | # define FIX_ALIASING |
| 108 | #endif |
| 109 | |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 110 | /* We use __extension__ in some places to suppress -pedantic warnings |
| 111 | about GCC extensions. This feature didn't work properly before |
| 112 | gcc 2.8. */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 113 | #if !__GNUC_PREREQ(2,8) |
Bernhard Reutner-Fischer | 86f5c99 | 2006-01-22 22:55:11 +0000 | [diff] [blame] | 114 | # ifndef __extension__ |
| 115 | # define __extension__ |
| 116 | # endif |
| 117 | #endif |
| 118 | |
Bernhard Reutner-Fischer | b5f50ea | 2006-09-12 13:27:55 +0000 | [diff] [blame] | 119 | /* gcc-2.95 had no va_copy but only __va_copy. */ |
Denis Vlasenko | 98636eb | 2008-05-09 17:59:34 +0000 | [diff] [blame] | 120 | #if !__GNUC_PREREQ(3,0) |
Bernhard Reutner-Fischer | b5f50ea | 2006-09-12 13:27:55 +0000 | [diff] [blame] | 121 | # include <stdarg.h> |
| 122 | # if !defined va_copy && defined __va_copy |
| 123 | # define va_copy(d,s) __va_copy((d),(s)) |
| 124 | # endif |
| 125 | #endif |
| 126 | |
Denis Vlasenko | 42b8daf | 2008-06-27 03:55:18 +0000 | [diff] [blame] | 127 | /* FAST_FUNC is a qualifier which (possibly) makes function call faster |
| 128 | * and/or smaller by using modified ABI. It is usually only needed |
| 129 | * on non-static, busybox internal functions. Recent versions of gcc |
| 130 | * optimize statics automatically. FAST_FUNC on static is required |
| 131 | * only if you need to match a function pointer's type */ |
Denis Vlasenko | ac2b50e | 2008-06-27 04:30:48 +0000 | [diff] [blame] | 132 | #if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */ |
| 133 | /* stdcall makes callee to pop arguments from stack, not caller */ |
| 134 | # define FAST_FUNC __attribute__((regparm(3),stdcall)) |
Denis Vlasenko | 42b8daf | 2008-06-27 03:55:18 +0000 | [diff] [blame] | 135 | /* #elif ... - add your favorite arch today! */ |
Denis Vlasenko | defc1ea | 2008-06-27 02:52:20 +0000 | [diff] [blame] | 136 | #else |
| 137 | # define FAST_FUNC |
| 138 | #endif |
| 139 | |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 140 | /* Make all declarations hidden (-fvisibility flag only affects definitions) */ |
| 141 | /* (don't include system headers after this until corresponding pop!) */ |
| 142 | #if __GNUC_PREREQ(4,1) |
| 143 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)") |
| 144 | # define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop") |
| 145 | #else |
| 146 | # define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN |
| 147 | # define POP_SAVED_FUNCTION_VISIBILITY |
| 148 | #endif |
| 149 | |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 150 | /* ---- Endian Detection ------------------------------------ */ |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 151 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 152 | #if defined(__digital__) && defined(__unix__) |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 153 | # include <sex.h> |
| 154 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) |
| 155 | # define __BYTE_ORDER BYTE_ORDER |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 156 | #elif defined __FreeBSD__ |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 157 | # include <sys/resource.h> /* rlimit */ |
| 158 | # include <machine/endian.h> |
| 159 | # define bswap_64 __bswap64 |
| 160 | # define bswap_32 __bswap32 |
| 161 | # define bswap_16 __bswap16 |
| 162 | # define __BIG_ENDIAN__ (_BYTE_ORDER == _BIG_ENDIAN) |
Rob Landley | 15d20a0 | 2006-05-29 05:00:44 +0000 | [diff] [blame] | 163 | #elif !defined __APPLE__ |
| 164 | # include <byteswap.h> |
| 165 | # include <endian.h> |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 166 | #endif |
| 167 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 168 | #if defined(__BIG_ENDIAN__) && __BIG_ENDIAN__ |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 169 | # define BB_BIG_ENDIAN 1 |
| 170 | # define BB_LITTLE_ENDIAN 0 |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 171 | #elif __BYTE_ORDER == __BIG_ENDIAN |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 172 | # define BB_BIG_ENDIAN 1 |
| 173 | # define BB_LITTLE_ENDIAN 0 |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 174 | #elif __BYTE_ORDER == __LITTLE_ENDIAN |
Mike Frysinger | f885513 | 2006-03-28 02:35:56 +0000 | [diff] [blame] | 175 | # define BB_BIG_ENDIAN 0 |
| 176 | # define BB_LITTLE_ENDIAN 1 |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 177 | #else |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 178 | # error "Can't determine endianness" |
Rob Landley | 5cf7c2d | 2006-02-21 06:44:43 +0000 | [diff] [blame] | 179 | #endif |
| 180 | |
Denis Vlasenko | 9b0f6e1 | 2008-11-01 13:40:32 +0000 | [diff] [blame] | 181 | /* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */ |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 182 | #if BB_BIG_ENDIAN |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 183 | # define SWAP_BE16(x) (x) |
| 184 | # define SWAP_BE32(x) (x) |
| 185 | # define SWAP_BE64(x) (x) |
| 186 | # define SWAP_LE16(x) bswap_16(x) |
| 187 | # define SWAP_LE32(x) bswap_32(x) |
| 188 | # define SWAP_LE64(x) bswap_64(x) |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 189 | #else |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 190 | # define SWAP_BE16(x) bswap_16(x) |
| 191 | # define SWAP_BE32(x) bswap_32(x) |
| 192 | # define SWAP_BE64(x) bswap_64(x) |
| 193 | # define SWAP_LE16(x) (x) |
| 194 | # define SWAP_LE32(x) (x) |
| 195 | # define SWAP_LE64(x) (x) |
Rob Landley | bba7f08 | 2006-05-29 05:51:12 +0000 | [diff] [blame] | 196 | #endif |
| 197 | |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 198 | /* ---- Unaligned access ------------------------------------ */ |
| 199 | |
Denis Vlasenko | efb545b | 2008-12-08 22:56:18 +0000 | [diff] [blame] | 200 | /* NB: unaligned parameter should be a pointer, aligned one - |
| 201 | * a lvalue. This makes it more likely to not swap them by mistake |
| 202 | */ |
Joakim Tjernlund | 80f4275 | 2010-02-11 08:48:15 +0100 | [diff] [blame] | 203 | #if defined(i386) || defined(__x86_64__) || defined(__powerpc__) |
Denys Vlasenko | 12ca080 | 2010-02-04 18:41:18 +0100 | [diff] [blame] | 204 | # include <stdint.h> |
| 205 | typedef int bb__aliased_int FIX_ALIASING; |
| 206 | typedef uint16_t bb__aliased_uint16_t FIX_ALIASING; |
| 207 | typedef uint32_t bb__aliased_uint32_t FIX_ALIASING; |
| 208 | # define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp)) |
| 209 | # define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p)) |
| 210 | # define move_from_unaligned32(v, u32p) ((v) = *(bb__aliased_uint32_t*)(u32p)) |
Denys Vlasenko | 5fb3849 | 2010-02-06 22:48:10 +0100 | [diff] [blame] | 211 | # define move_to_unaligned16(u16p, v) (*(bb__aliased_uint16_t*)(u16p) = (v)) |
Denys Vlasenko | 12ca080 | 2010-02-04 18:41:18 +0100 | [diff] [blame] | 212 | # define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v)) |
Denis Vlasenko | 42b8daf | 2008-06-27 03:55:18 +0000 | [diff] [blame] | 213 | /* #elif ... - add your favorite arch today! */ |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 214 | #else |
| 215 | /* performs reasonably well (gcc usually inlines memcpy here) */ |
Denys Vlasenko | 57be1ee | 2009-11-26 15:26:31 +0100 | [diff] [blame] | 216 | # define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int))) |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 217 | # define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2)) |
| 218 | # define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4)) |
Denys Vlasenko | 5fb3849 | 2010-02-06 22:48:10 +0100 | [diff] [blame] | 219 | # define move_to_unaligned16(u16p, v) do { \ |
| 220 | uint16_t __t = (v); \ |
| 221 | memcpy((u16p), &__t, 4); \ |
| 222 | } while (0) |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 223 | # define move_to_unaligned32(u32p, v) do { \ |
Denis Vlasenko | 3be2308 | 2009-04-17 22:20:44 +0000 | [diff] [blame] | 224 | uint32_t __t = (v); \ |
| 225 | memcpy((u32p), &__t, 4); \ |
| 226 | } while (0) |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 227 | #endif |
| 228 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 229 | /* ---- Compiler dependent settings ------------------------- */ |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 230 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 231 | #if (defined __digital__ && defined __unix__) \ |
| 232 | || defined __APPLE__ || defined __FreeBSD__ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 233 | # undef HAVE_MNTENT_H |
Mike Frysinger | 9412ec7 | 2008-02-07 22:41:33 +0000 | [diff] [blame] | 234 | # undef HAVE_SYS_STATFS_H |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 235 | #else |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 236 | # define HAVE_MNTENT_H 1 |
Mike Frysinger | 9412ec7 | 2008-02-07 22:41:33 +0000 | [diff] [blame] | 237 | # define HAVE_SYS_STATFS_H 1 |
Bernhard Reutner-Fischer | 8c69afd | 2008-01-29 10:33:34 +0000 | [diff] [blame] | 238 | #endif |
Bernhard Reutner-Fischer | be86209 | 2007-03-19 15:15:06 +0000 | [diff] [blame] | 239 | |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 240 | /*----- Kernel versioning ------------------------------------*/ |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 241 | |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 242 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
Bernhard Reutner-Fischer | e2e56c7 | 2006-05-19 11:54:02 +0000 | [diff] [blame] | 243 | |
Denis Vlasenko | fc9e108 | 2008-05-26 17:32:35 +0000 | [diff] [blame] | 244 | /* ---- Miscellaneous --------------------------------------- */ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 245 | |
Mike Frysinger | b16b5bb | 2006-06-06 06:00:20 +0000 | [diff] [blame] | 246 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 247 | !defined(__dietlibc__) && \ |
| 248 | !defined(_NEWLIB_VERSION) && \ |
| 249 | !(defined __digital__ && defined __unix__) |
Mike Frysinger | b16b5bb | 2006-06-06 06:00:20 +0000 | [diff] [blame] | 250 | # error "Sorry, this libc version is not supported :(" |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 251 | #endif |
| 252 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 253 | /* Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. */ |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 254 | |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 255 | #if defined __GLIBC__ || defined __UCLIBC__ \ |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 256 | || defined __dietlibc__ || defined _NEWLIB_VERSION |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 257 | # include <features.h> |
Bernhard Reutner-Fischer | e00fc16 | 2006-05-26 13:10:10 +0000 | [diff] [blame] | 258 | #endif |
| 259 | |
Bernhard Reutner-Fischer | c966ba4 | 2007-01-18 10:32:09 +0000 | [diff] [blame] | 260 | /* Size-saving "small" ints (arch-dependent) */ |
| 261 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) |
| 262 | /* add other arches which benefit from this... */ |
| 263 | typedef signed char smallint; |
| 264 | typedef unsigned char smalluint; |
| 265 | #else |
| 266 | /* for arches where byte accesses generate larger code: */ |
| 267 | typedef int smallint; |
| 268 | typedef unsigned smalluint; |
| 269 | #endif |
| 270 | |
Bernhard Reutner-Fischer | a8e2e18 | 2007-01-20 21:27:18 +0000 | [diff] [blame] | 271 | /* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */ |
| 272 | #if (defined __digital__ && defined __unix__) |
| 273 | /* old system without (proper) C99 support */ |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 274 | # define bool smalluint |
Bernhard Reutner-Fischer | a8e2e18 | 2007-01-20 21:27:18 +0000 | [diff] [blame] | 275 | #else |
| 276 | /* modern system, so use it */ |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 277 | # include <stdbool.h> |
Bernhard Reutner-Fischer | a8e2e18 | 2007-01-20 21:27:18 +0000 | [diff] [blame] | 278 | #endif |
| 279 | |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 280 | /* Try to defeat gcc's alignment of "char message[]"-like data */ |
| 281 | #if 1 /* if needed: !defined(arch1) && !defined(arch2) */ |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 282 | # define ALIGN1 __attribute__((aligned(1))) |
| 283 | # define ALIGN2 __attribute__((aligned(2))) |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 284 | #else |
| 285 | /* Arches which MUST have 2 or 4 byte alignment for everything are here */ |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 286 | # define ALIGN1 |
| 287 | # define ALIGN2 |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 288 | #endif |
| 289 | |
Bernhard Reutner-Fischer | a8e2e18 | 2007-01-20 21:27:18 +0000 | [diff] [blame] | 290 | |
Mike Frysinger | 8840759 | 2006-07-20 19:31:07 +0000 | [diff] [blame] | 291 | /* uclibc does not implement daemon() for no-mmu systems. |
Bernhard Reutner-Fischer | 507cd75 | 2006-05-31 10:04:03 +0000 | [diff] [blame] | 292 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. |
| 293 | * For earlier versions there is no reliable way to check if we are building |
Denis Vlasenko | 9e58921 | 2008-01-24 01:33:42 +0000 | [diff] [blame] | 294 | * for a mmu-less system. |
Bernhard Reutner-Fischer | 507cd75 | 2006-05-31 10:04:03 +0000 | [diff] [blame] | 295 | */ |
Denis Vlasenko | d2c450c | 2008-01-08 20:32:12 +0000 | [diff] [blame] | 296 | #if ENABLE_NOMMU || \ |
| 297 | (defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ |
| 298 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__) |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 299 | # define BB_MMU 0 |
| 300 | # define USE_FOR_NOMMU(...) __VA_ARGS__ |
| 301 | # define USE_FOR_MMU(...) |
Denis Vlasenko | 473dae0 | 2007-04-11 07:04:23 +0000 | [diff] [blame] | 302 | #else |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 303 | # define BB_MMU 1 |
| 304 | # define USE_FOR_NOMMU(...) |
| 305 | # define USE_FOR_MMU(...) __VA_ARGS__ |
Bernhard Reutner-Fischer | 507cd75 | 2006-05-31 10:04:03 +0000 | [diff] [blame] | 306 | #endif |
| 307 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 308 | /* Don't use lchown with glibc older than 2.1.x */ |
| 309 | #if defined(__GLIBC__) && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1 |
Mike Frysinger | 8840759 | 2006-07-20 19:31:07 +0000 | [diff] [blame] | 310 | # define lchown chown |
| 311 | #endif |
| 312 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 313 | #if defined(__digital__) && defined(__unix__) |
Rob Landley | 8fba99f | 2006-05-27 22:08:01 +0000 | [diff] [blame] | 314 | |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 315 | # include <standards.h> |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 316 | # include <inttypes.h> |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 317 | # define PRIu32 "u" |
Denis Vlasenko | 0de3c55 | 2007-04-12 12:31:02 +0000 | [diff] [blame] | 318 | /* use legacy setpgrp(pid_t,pid_t) for now. move to platform.c */ |
Denys Vlasenko | 245a4f8 | 2009-11-07 01:31:14 +0100 | [diff] [blame] | 319 | # define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0) |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 320 | # if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET |
| 321 | # define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) |
| 322 | # endif |
| 323 | # if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY |
| 324 | # define ADJ_FREQUENCY MOD_FREQUENCY |
| 325 | # endif |
| 326 | # if !defined ADJ_TIMECONST && defined MOD_TIMECONST |
| 327 | # define ADJ_TIMECONST MOD_TIMECONST |
| 328 | # endif |
| 329 | # if !defined ADJ_TICK && defined MOD_CLKB |
| 330 | # define ADJ_TICK MOD_CLKB |
| 331 | # endif |
Rob Landley | 8fba99f | 2006-05-27 22:08:01 +0000 | [diff] [blame] | 332 | |
Denys Vlasenko | 9b1b62a | 2009-07-05 03:34:12 +0200 | [diff] [blame] | 333 | #else |
Denis Vlasenko | 6ebb2f5 | 2008-12-03 10:46:12 +0000 | [diff] [blame] | 334 | |
| 335 | # define bb_setpgrp() setpgrp() |
| 336 | |
Rob Landley | 18958e9 | 2006-06-13 18:28:33 +0000 | [diff] [blame] | 337 | #endif |
| 338 | |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 339 | #if defined(__GLIBC__) |
| 340 | # define fdprintf dprintf |
| 341 | #endif |
| 342 | |
| 343 | #if defined(__dietlibc__) |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 344 | # undef HAVE_STRCHRNUL |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 345 | #endif |
| 346 | |
| 347 | #if defined(__WATCOMC__) |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 348 | # undef HAVE_FDPRINTF |
| 349 | # undef HAVE_MEMRCHR |
| 350 | # undef HAVE_MKDTEMP |
| 351 | # undef HAVE_SETBIT |
| 352 | # undef HAVE_STRCASESTR |
| 353 | # undef HAVE_STRCHRNUL |
| 354 | # undef HAVE_STRSIGNAL |
| 355 | # undef HAVE_VASPRINTF |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 356 | #endif |
| 357 | |
| 358 | #if defined(__FreeBSD__) |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 359 | # undef HAVE_STRCHRNUL |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 360 | #endif |
| 361 | |
| 362 | /* |
| 363 | * Now, define prototypes for all the functions defined in platform.c |
| 364 | * These must come after all the HAVE_* macros are defined (or not) |
| 365 | */ |
| 366 | |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 367 | #ifndef HAVE_FDPRINTF |
| 368 | extern int fdprintf(int fd, const char *format, ...); |
| 369 | #endif |
| 370 | |
| 371 | #ifndef HAVE_MEMRCHR |
| 372 | extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC; |
| 373 | #endif |
| 374 | |
| 375 | #ifndef HAVE_MKDTEMP |
| 376 | extern char *mkdtemp(char *template) FAST_FUNC; |
| 377 | #endif |
| 378 | |
| 379 | #ifndef HAVE_SETBIT |
| 380 | # define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7)) |
| 381 | # define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7))) |
| 382 | #endif |
| 383 | |
| 384 | #ifndef HAVE_STRCASESTR |
| 385 | extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC; |
| 386 | #endif |
| 387 | |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 388 | #ifndef HAVE_STRCHRNUL |
| 389 | extern char *strchrnul(const char *s, int c) FAST_FUNC; |
| 390 | #endif |
| 391 | |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 392 | #ifndef HAVE_STRSIGNAL |
| 393 | /* Not exactly the same: instead of "Stopped" it shows "STOP" etc */ |
| 394 | # define strsignal(sig) get_signame(sig) |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 395 | #endif |
| 396 | |
Dan Fandrich | fe4e23f | 2009-11-01 04:01:30 +0100 | [diff] [blame] | 397 | #ifndef HAVE_VASPRINTF |
| 398 | extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC; |
Dan Fandrich | 21a542d | 2009-10-27 11:05:00 +0100 | [diff] [blame] | 399 | #endif |
Denys Vlasenko | 5a49d28 | 2009-05-19 13:18:45 +0200 | [diff] [blame] | 400 | |
Denis Vlasenko | f81e8db | 2009-04-09 12:35:13 +0000 | [diff] [blame] | 401 | #endif |