blob: 1706b1847fc518d24906bc3e583f171e9d4c69d8 [file] [log] [blame]
Bernhard Reutner-Fischerb1629b12006-05-19 19:29:19 +00001/* vi: set sw=4 ts=4: */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +00002/*
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02003 * Copyright 2006, Bernhard Reutner-Fischer
Denys Vlasenko867ffb92010-08-16 03:24:40 +02004 *
Denys Vlasenko0ef64bd2010-08-16 20:14:46 +02005 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
Denys Vlasenko867ffb92010-08-16 03:24:40 +02006 */
Denys Vlasenkoe4dcba12010-10-28 18:57:19 +02007#ifndef BB_PLATFORM_H
Denis Vlasenkof81e8db2009-04-09 12:35:13 +00008#define BB_PLATFORM_H 1
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +00009
Dan Fandrich21a542d2009-10-27 11:05:00 +010010
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000011/* Convenience macros to test the version of gcc. */
12#undef __GNUC_PREREQ
13#if defined __GNUC__ && defined __GNUC_MINOR__
14# define __GNUC_PREREQ(maj, min) \
Denis Vlasenko9213a9e2006-09-17 16:28:10 +000015 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000016#else
17# define __GNUC_PREREQ(maj, min) 0
18#endif
19
20/* __restrict is known in EGCS 1.2 and above. */
Denis Vlasenko98636eb2008-05-09 17:59:34 +000021#if !__GNUC_PREREQ(2,92)
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000022# ifndef __restrict
Denys Vlasenko5a49d282009-05-19 13:18:45 +020023# define __restrict
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000024# endif
25#endif
26
Denis Vlasenko98636eb2008-05-09 17:59:34 +000027#if !__GNUC_PREREQ(2,7)
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000028# ifndef __attribute__
29# define __attribute__(x)
30# endif
31#endif
32
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000033#undef inline
Denis Vlasenkoa7189f02006-11-17 20:29:00 +000034#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000035/* it's a keyword */
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +020036#elif __GNUC_PREREQ(2,7)
37# define inline __inline__
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000038#else
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +020039# define inline
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000040#endif
41
42#ifndef __const
43# define __const const
44#endif
45
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000046#define UNUSED_PARAM __attribute__ ((__unused__))
47#define NORETURN __attribute__ ((__noreturn__))
Denys Vlasenko53283ad2009-11-02 14:20:34 +010048/* "The malloc attribute is used to tell the compiler that a function
49 * may be treated as if any non-NULL pointer it returns cannot alias
50 * any other pointer valid when the function returns. This will often
51 * improve optimization. Standard functions with this property include
52 * malloc and calloc. realloc-like functions have this property as long
53 * as the old pointer is never referred to (including comparing it
54 * to the new pointer) after the function returns a non-NULL value."
55 */
56#define RETURNS_MALLOC __attribute__ ((malloc))
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000057#define PACKED __attribute__ ((__packed__))
58#define ALIGNED(m) __attribute__ ((__aligned__(m)))
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +020059
Denis Vlasenko0f3a5802008-03-20 13:13:09 +000060/* __NO_INLINE__: some gcc's do not honor inlining! :( */
Denis Vlasenko98636eb2008-05-09 17:59:34 +000061#if __GNUC_PREREQ(3,0) && !defined(__NO_INLINE__)
62# define ALWAYS_INLINE __attribute__ ((always_inline)) inline
Denis Vlasenko77f1ec12007-10-13 03:36:03 +000063/* I've seen a toolchain where I needed __noinline__ instead of noinline */
Denis Vlasenko98636eb2008-05-09 17:59:34 +000064# define NOINLINE __attribute__((__noinline__))
65# if !ENABLE_WERROR
Denis Vlasenkoa60f84e2008-07-05 09:18:54 +000066# define DEPRECATED __attribute__ ((__deprecated__))
67# define UNUSED_PARAM_RESULT __attribute__ ((warn_unused_result))
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000068# else
Denys Vlasenko5a49d282009-05-19 13:18:45 +020069# define DEPRECATED
70# define UNUSED_PARAM_RESULT
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000071# endif
Denis Vlasenko98636eb2008-05-09 17:59:34 +000072#else
Denys Vlasenko5a49d282009-05-19 13:18:45 +020073# define ALWAYS_INLINE inline
74# define NOINLINE
75# define DEPRECATED
76# define UNUSED_PARAM_RESULT
Denis Vlasenko98636eb2008-05-09 17:59:34 +000077#endif
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000078
Bartosz Golaszewskibf0f2c72014-06-26 14:31:05 +020079/* used by unit test machinery to run registration functions before calling main() */
80#define INIT_FUNC __attribute__ ((constructor))
Bartosz Golaszewski3ed81cf2014-06-22 16:30:41 +020081
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000082/* -fwhole-program makes all symbols local. The attribute externally_visible
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +020083 * forces a symbol global. */
Denis Vlasenko98636eb2008-05-09 17:59:34 +000084#if __GNUC_PREREQ(4,1)
85# define EXTERNALLY_VISIBLE __attribute__(( visibility("default") ))
Denis Vlasenko9b49a5e2007-10-11 10:05:36 +000086//__attribute__ ((__externally_visible__))
Denis Vlasenko98636eb2008-05-09 17:59:34 +000087#else
88# define EXTERNALLY_VISIBLE
Denis Vlasenko6ebb2f52008-12-03 10:46:12 +000089#endif
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000090
Denys Vlasenko98a4c7c2010-02-04 15:00:15 +010091/* At 4.4 gcc become much more anal about this, need to use "aliased" types */
92#if __GNUC_PREREQ(4,4)
93# define FIX_ALIASING __attribute__((__may_alias__))
94#else
95# define FIX_ALIASING
96#endif
97
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000098/* We use __extension__ in some places to suppress -pedantic warnings
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +020099 * about GCC extensions. This feature didn't work properly before
100 * gcc 2.8. */
Denis Vlasenko98636eb2008-05-09 17:59:34 +0000101#if !__GNUC_PREREQ(2,8)
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +0000102# ifndef __extension__
103# define __extension__
104# endif
105#endif
106
Denis Vlasenko42b8daf2008-06-27 03:55:18 +0000107/* FAST_FUNC is a qualifier which (possibly) makes function call faster
108 * and/or smaller by using modified ABI. It is usually only needed
109 * on non-static, busybox internal functions. Recent versions of gcc
110 * optimize statics automatically. FAST_FUNC on static is required
111 * only if you need to match a function pointer's type */
Denis Vlasenkoac2b50e2008-06-27 04:30:48 +0000112#if __GNUC_PREREQ(3,0) && defined(i386) /* || defined(__x86_64__)? */
113/* stdcall makes callee to pop arguments from stack, not caller */
114# define FAST_FUNC __attribute__((regparm(3),stdcall))
Denis Vlasenko42b8daf2008-06-27 03:55:18 +0000115/* #elif ... - add your favorite arch today! */
Denis Vlasenkodefc1ea2008-06-27 02:52:20 +0000116#else
117# define FAST_FUNC
118#endif
119
Denis Vlasenkof81e8db2009-04-09 12:35:13 +0000120/* Make all declarations hidden (-fvisibility flag only affects definitions) */
121/* (don't include system headers after this until corresponding pop!) */
Denys Vlasenko4dc35fb2011-07-08 04:41:38 +0200122#if __GNUC_PREREQ(4,1) && !defined(__CYGWIN__)
Denis Vlasenkof81e8db2009-04-09 12:35:13 +0000123# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN _Pragma("GCC visibility push(hidden)")
124# define POP_SAVED_FUNCTION_VISIBILITY _Pragma("GCC visibility pop")
125#else
126# define PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
127# define POP_SAVED_FUNCTION_VISIBILITY
128#endif
129
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200130/* gcc-2.95 had no va_copy but only __va_copy. */
131#if !__GNUC_PREREQ(3,0)
132# include <stdarg.h>
133# if !defined va_copy && defined __va_copy
134# define va_copy(d,s) __va_copy((d),(s))
135# endif
136#endif
137
138
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000139/* ---- Endian Detection ------------------------------------ */
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000140
Denys Vlasenko9ff50b82010-10-18 11:40:26 +0200141#include <limits.h>
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +0200142#if defined(__digital__) && defined(__unix__)
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000143# include <sex.h>
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200144#elif defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
145 || defined(__APPLE__)
Denys Vlasenkofb132e42010-10-29 11:46:52 +0200146# include <sys/resource.h> /* rlimit */
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +0200147# include <machine/endian.h>
148# define bswap_64 __bswap64
149# define bswap_32 __bswap32
150# define bswap_16 __bswap16
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200151#else
Rob Landley15d20a02006-05-29 05:00:44 +0000152# include <byteswap.h>
153# include <endian.h>
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000154#endif
155
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200156#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN
Mike Frysingerf8855132006-03-28 02:35:56 +0000157# define BB_BIG_ENDIAN 1
158# define BB_LITTLE_ENDIAN 0
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200159#elif defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN
160# define BB_BIG_ENDIAN 0
161# define BB_LITTLE_ENDIAN 1
Waldemar Brodkorb95b83ba2010-08-06 09:17:26 +0200162#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _BIG_ENDIAN
163# define BB_BIG_ENDIAN 1
164# define BB_LITTLE_ENDIAN 0
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200165#elif defined(_BYTE_ORDER) && _BYTE_ORDER == _LITTLE_ENDIAN
Mike Frysingerf8855132006-03-28 02:35:56 +0000166# define BB_BIG_ENDIAN 0
167# define BB_LITTLE_ENDIAN 1
Denys Vlasenko867ffb92010-08-16 03:24:40 +0200168#elif defined(BYTE_ORDER) && BYTE_ORDER == BIG_ENDIAN
169# define BB_BIG_ENDIAN 1
170# define BB_LITTLE_ENDIAN 0
171#elif defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN
172# define BB_BIG_ENDIAN 0
173# define BB_LITTLE_ENDIAN 1
174#elif defined(__386__)
Waldemar Brodkorb95b83ba2010-08-06 09:17:26 +0200175# define BB_BIG_ENDIAN 0
176# define BB_LITTLE_ENDIAN 1
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +0200177#else
Dan Fandrich21a542d2009-10-27 11:05:00 +0100178# error "Can't determine endianness"
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000179#endif
180
Denys Vlasenko9ff50b82010-10-18 11:40:26 +0200181#if ULONG_MAX > 0xffffffff
182# define bb_bswap_64(x) bswap_64(x)
183#endif
184
Denis Vlasenko9b0f6e12008-11-01 13:40:32 +0000185/* SWAP_LEnn means "convert CPU<->little_endian by swapping bytes" */
Rob Landleybba7f082006-05-29 05:51:12 +0000186#if BB_BIG_ENDIAN
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200187# define SWAP_BE16(x) (x)
188# define SWAP_BE32(x) (x)
189# define SWAP_BE64(x) (x)
190# define SWAP_LE16(x) bswap_16(x)
191# define SWAP_LE32(x) bswap_32(x)
Denys Vlasenko9ff50b82010-10-18 11:40:26 +0200192# define SWAP_LE64(x) bb_bswap_64(x)
Denys Vlasenkobcccad32010-10-16 20:46:35 +0200193# define IF_BIG_ENDIAN(...) __VA_ARGS__
194# define IF_LITTLE_ENDIAN(...)
Rob Landleybba7f082006-05-29 05:51:12 +0000195#else
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200196# define SWAP_BE16(x) bswap_16(x)
197# define SWAP_BE32(x) bswap_32(x)
Denys Vlasenko9ff50b82010-10-18 11:40:26 +0200198# define SWAP_BE64(x) bb_bswap_64(x)
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200199# define SWAP_LE16(x) (x)
200# define SWAP_LE32(x) (x)
201# define SWAP_LE64(x) (x)
Denys Vlasenkobcccad32010-10-16 20:46:35 +0200202# define IF_BIG_ENDIAN(...)
203# define IF_LITTLE_ENDIAN(...) __VA_ARGS__
Rob Landleybba7f082006-05-29 05:51:12 +0000204#endif
205
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200206
Denis Vlasenkofc9e1082008-05-26 17:32:35 +0000207/* ---- Unaligned access ------------------------------------ */
208
Denys Vlasenko1f4a9872011-01-22 17:31:35 +0100209#include <stdint.h>
Denys Vlasenkob40da222011-01-21 01:16:09 +0100210typedef int bb__aliased_int FIX_ALIASING;
Lauri Kasanenb8173b62013-01-14 05:20:50 +0100211typedef long bb__aliased_long FIX_ALIASING;
Denys Vlasenkob40da222011-01-21 01:16:09 +0100212typedef uint16_t bb__aliased_uint16_t FIX_ALIASING;
213typedef uint32_t bb__aliased_uint32_t FIX_ALIASING;
Denys Vlasenko1f5e81f2013-06-27 01:03:19 +0200214typedef uint64_t bb__aliased_uint64_t FIX_ALIASING;
Denys Vlasenkob40da222011-01-21 01:16:09 +0100215
Denis Vlasenkoefb545b2008-12-08 22:56:18 +0000216/* NB: unaligned parameter should be a pointer, aligned one -
217 * a lvalue. This makes it more likely to not swap them by mistake
218 */
Joakim Tjernlund80f42752010-02-11 08:48:15 +0100219#if defined(i386) || defined(__x86_64__) || defined(__powerpc__)
Denys Vlasenkof7f70bf2015-02-02 16:07:07 +0100220# define BB_UNALIGNED_MEMACCESS_OK 1
Lauri Kasanenb8173b62013-01-14 05:20:50 +0100221# define move_from_unaligned_int(v, intp) ((v) = *(bb__aliased_int*)(intp))
222# define move_from_unaligned_long(v, longp) ((v) = *(bb__aliased_long*)(longp))
Denys Vlasenko12ca0802010-02-04 18:41:18 +0100223# define move_from_unaligned16(v, u16p) ((v) = *(bb__aliased_uint16_t*)(u16p))
224# define move_from_unaligned32(v, u32p) ((v) = *(bb__aliased_uint32_t*)(u32p))
Denys Vlasenko5fb38492010-02-06 22:48:10 +0100225# define move_to_unaligned16(u16p, v) (*(bb__aliased_uint16_t*)(u16p) = (v))
Denys Vlasenko12ca0802010-02-04 18:41:18 +0100226# define move_to_unaligned32(u32p, v) (*(bb__aliased_uint32_t*)(u32p) = (v))
Denis Vlasenko42b8daf2008-06-27 03:55:18 +0000227/* #elif ... - add your favorite arch today! */
Denis Vlasenkofc9e1082008-05-26 17:32:35 +0000228#else
Denys Vlasenkof7f70bf2015-02-02 16:07:07 +0100229# define BB_UNALIGNED_MEMACCESS_OK 0
Denis Vlasenkofc9e1082008-05-26 17:32:35 +0000230/* performs reasonably well (gcc usually inlines memcpy here) */
Denys Vlasenko57be1ee2009-11-26 15:26:31 +0100231# define move_from_unaligned_int(v, intp) (memcpy(&(v), (intp), sizeof(int)))
Lauri Kasanenb8173b62013-01-14 05:20:50 +0100232# define move_from_unaligned_long(v, longp) (memcpy(&(v), (longp), sizeof(long)))
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200233# define move_from_unaligned16(v, u16p) (memcpy(&(v), (u16p), 2))
234# define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
Denys Vlasenko5fb38492010-02-06 22:48:10 +0100235# define move_to_unaligned16(u16p, v) do { \
236 uint16_t __t = (v); \
Denys Vlasenkoe3e32162013-02-27 15:49:38 +0100237 memcpy((u16p), &__t, 2); \
Denys Vlasenko5fb38492010-02-06 22:48:10 +0100238} while (0)
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200239# define move_to_unaligned32(u32p, v) do { \
Denis Vlasenko3be23082009-04-17 22:20:44 +0000240 uint32_t __t = (v); \
241 memcpy((u32p), &__t, 4); \
242} while (0)
Denis Vlasenkofc9e1082008-05-26 17:32:35 +0000243#endif
244
Denis Vlasenkofc9e1082008-05-26 17:32:35 +0000245
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200246/* ---- Size-saving "small" ints (arch-dependent) ----------- */
Bernhard Reutner-Fischerbe862092007-03-19 15:15:06 +0000247
Bernhard Reutner-Fischerc966ba42007-01-18 10:32:09 +0000248#if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
249/* add other arches which benefit from this... */
250typedef signed char smallint;
251typedef unsigned char smalluint;
252#else
253/* for arches where byte accesses generate larger code: */
254typedef int smallint;
255typedef unsigned smalluint;
256#endif
257
Bernhard Reutner-Fischera8e2e182007-01-20 21:27:18 +0000258/* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
259#if (defined __digital__ && defined __unix__)
260/* old system without (proper) C99 support */
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200261# define bool smalluint
Bernhard Reutner-Fischera8e2e182007-01-20 21:27:18 +0000262#else
263/* modern system, so use it */
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200264# include <stdbool.h>
Bernhard Reutner-Fischera8e2e182007-01-20 21:27:18 +0000265#endif
266
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200267
268/*----- Kernel versioning ------------------------------------*/
269
270#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
271
Mike Frysinger445e7542013-03-12 11:13:22 -0400272#ifdef __UCLIBC__
273# define UCLIBC_VERSION KERNEL_VERSION(__UCLIBC_MAJOR__, __UCLIBC_MINOR__, __UCLIBC_SUBLEVEL__)
274#else
275# define UCLIBC_VERSION 0
276#endif
277
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200278
279/* ---- Miscellaneous --------------------------------------- */
280
281#if defined __GLIBC__ \
282 || defined __UCLIBC__ \
283 || defined __dietlibc__ \
Denys Vlasenko14bd16a2011-07-08 08:49:40 +0200284 || defined __BIONIC__ \
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200285 || defined _NEWLIB_VERSION
286# include <features.h>
287#endif
288
289/* Define bb_setpgrp */
290#if defined(__digital__) && defined(__unix__)
291/* use legacy setpgrp(pid_t, pid_t) for now. move to platform.c */
292# define bb_setpgrp() do { pid_t __me = getpid(); setpgrp(__me, __me); } while (0)
293#else
294# define bb_setpgrp() setpgrp()
295#endif
296
297/* fdprintf is more readable, we used it before dprintf was standardized */
298#include <unistd.h>
299#define fdprintf dprintf
300
301/* Useful for defeating gcc's alignment of "char message[]"-like data */
Denys Vlasenko2ffd7102012-08-06 17:17:15 +0200302#if !defined(__s390__)
303 /* on s390[x], non-word-aligned data accesses require larger code */
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200304# define ALIGN1 __attribute__((aligned(1)))
305# define ALIGN2 __attribute__((aligned(2)))
Denys Vlasenko0ecc1162010-04-14 10:14:25 -0700306# define ALIGN4 __attribute__((aligned(4)))
Denis Vlasenko6ca409e2007-08-12 20:58:27 +0000307#else
308/* Arches which MUST have 2 or 4 byte alignment for everything are here */
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200309# define ALIGN1
310# define ALIGN2
Denys Vlasenko0ecc1162010-04-14 10:14:25 -0700311# define ALIGN4
Denis Vlasenko6ca409e2007-08-12 20:58:27 +0000312#endif
313
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200314/*
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000315 * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
316 * For earlier versions there is no reliable way to check if we are building
Denis Vlasenko9e589212008-01-24 01:33:42 +0000317 * for a mmu-less system.
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000318 */
Denis Vlasenkod2c450c2008-01-08 20:32:12 +0000319#if ENABLE_NOMMU || \
Mike Frysinger445e7542013-03-12 11:13:22 -0400320 (defined __UCLIBC__ && \
321 UCLIBC_VERSION > KERNEL_VERSION(0, 9, 28) && \
322 !defined __ARCH_USE_MMU__)
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200323# define BB_MMU 0
324# define USE_FOR_NOMMU(...) __VA_ARGS__
325# define USE_FOR_MMU(...)
Denis Vlasenko473dae02007-04-11 07:04:23 +0000326#else
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200327# define BB_MMU 1
328# define USE_FOR_NOMMU(...)
329# define USE_FOR_MMU(...) __VA_ARGS__
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000330#endif
331
Denys Vlasenko9b1b62a2009-07-05 03:34:12 +0200332#if defined(__digital__) && defined(__unix__)
Denis Vlasenko6ebb2f52008-12-03 10:46:12 +0000333# include <standards.h>
Denis Vlasenko6ebb2f52008-12-03 10:46:12 +0000334# include <inttypes.h>
Denis Vlasenko6ebb2f52008-12-03 10:46:12 +0000335# define PRIu32 "u"
Denis Vlasenko6ebb2f52008-12-03 10:46:12 +0000336# if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
337# define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
338# endif
339# if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
340# define ADJ_FREQUENCY MOD_FREQUENCY
341# endif
342# if !defined ADJ_TIMECONST && defined MOD_TIMECONST
343# define ADJ_TIMECONST MOD_TIMECONST
344# endif
345# if !defined ADJ_TICK && defined MOD_CLKB
346# define ADJ_TICK MOD_CLKB
347# endif
Rob Landley18958e92006-06-13 18:28:33 +0000348#endif
349
Denys Vlasenko4dc35fb2011-07-08 04:41:38 +0200350#if defined(__CYGWIN__)
351# define MAXSYMLINKS SYMLOOP_MAX
352#endif
353
Tias Guns36451952012-06-10 14:26:32 +0200354#if defined(ANDROID) || defined(__ANDROID__)
355# define BB_ADDITIONAL_PATH ":/system/sbin:/system/bin:/system/xbin"
356# define SYS_ioprio_set __NR_ioprio_set
357# define SYS_ioprio_get __NR_ioprio_get
358#endif
359
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200360
361/* ---- Who misses what? ------------------------------------ */
362
Dan Fandrichf533ec82011-06-10 05:17:59 +0200363/* Assume all these functions and header files exist by default.
364 * Platforms where it is not true will #undef them below.
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200365 */
366#define HAVE_CLEARENV 1
367#define HAVE_FDATASYNC 1
368#define HAVE_DPRINTF 1
369#define HAVE_MEMRCHR 1
370#define HAVE_MKDTEMP 1
Matt Whitlockcee59052015-04-25 21:32:48 +0200371#define HAVE_TTYNAME_R 1
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200372#define HAVE_PTSNAME_R 1
373#define HAVE_SETBIT 1
374#define HAVE_SIGHANDLER_T 1
375#define HAVE_STPCPY 1
Denys Vlasenko50a6d862015-01-25 22:08:46 +0100376#define HAVE_MEMPCPY 1
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200377#define HAVE_STRCASESTR 1
378#define HAVE_STRCHRNUL 1
379#define HAVE_STRSEP 1
380#define HAVE_STRSIGNAL 1
Denys Vlasenko561f9c82011-06-21 16:38:29 +0200381#define HAVE_STRVERSCMP 1
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200382#define HAVE_VASPRINTF 1
Bernhard Reutner-Fischerad167412014-04-13 16:37:57 +0200383#define HAVE_USLEEP 1
Dan Fandrich75214cf2011-06-30 02:59:17 +0200384#define HAVE_UNLOCKED_STDIO 1
385#define HAVE_UNLOCKED_LINE_OPS 1
Timo Teras0a5b3102011-06-29 02:19:58 +0200386#define HAVE_GETLINE 1
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200387#define HAVE_XTABS 1
Dan Fandrichf533ec82011-06-10 05:17:59 +0200388#define HAVE_MNTENT_H 1
389#define HAVE_NET_ETHERNET_H 1
390#define HAVE_SYS_STATFS_H 1
391
Bernhard Reutner-Fischerad167412014-04-13 16:37:57 +0200392#if defined(__UCLIBC__)
393# if UCLIBC_VERSION < KERNEL_VERSION(0, 9, 32)
394# undef HAVE_STRVERSCMP
395# endif
396# if UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 30)
397# ifndef __UCLIBC_SUSV3_LEGACY__
398# undef HAVE_USLEEP
399# endif
400# endif
Denys Vlasenko1e18a012011-06-21 17:12:52 +0200401#endif
402
Dan Fandrich21a542d2009-10-27 11:05:00 +0100403#if defined(__WATCOMC__)
Denys Vlasenko47061b42011-04-17 23:14:19 +0200404# undef HAVE_DPRINTF
Dan Fandrich0e79e7b2011-06-28 23:03:27 -0700405# undef HAVE_GETLINE
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100406# undef HAVE_MEMRCHR
407# undef HAVE_MKDTEMP
408# undef HAVE_SETBIT
Dan Fandrichdc506762011-02-12 22:26:57 -0800409# undef HAVE_STPCPY
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100410# undef HAVE_STRCASESTR
411# undef HAVE_STRCHRNUL
Dan Fandrich0635ddd2010-06-18 22:36:45 -0700412# undef HAVE_STRSEP
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100413# undef HAVE_STRSIGNAL
Denys Vlasenko561f9c82011-06-21 16:38:29 +0200414# undef HAVE_STRVERSCMP
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100415# undef HAVE_VASPRINTF
Dan Fandrich75214cf2011-06-30 02:59:17 +0200416# undef HAVE_UNLOCKED_STDIO
417# undef HAVE_UNLOCKED_LINE_OPS
Dan Fandrichf533ec82011-06-10 05:17:59 +0200418# undef HAVE_NET_ETHERNET_H
Dan Fandrich21a542d2009-10-27 11:05:00 +0100419#endif
420
Denys Vlasenko4dc35fb2011-07-08 04:41:38 +0200421#if defined(__CYGWIN__)
422# undef HAVE_CLEARENV
423# undef HAVE_FDPRINTF
424# undef HAVE_MEMRCHR
425# undef HAVE_PTSNAME_R
426# undef HAVE_STRVERSCMP
427# undef HAVE_UNLOCKED_LINE_OPS
428#endif
429
Dan Fandrich0e79e7b2011-06-28 23:03:27 -0700430/* These BSD-derived OSes share many similarities */
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200431#if (defined __digital__ && defined __unix__) \
432 || defined __APPLE__ \
Denys Vlasenko8e0ad262014-01-08 15:10:54 +0100433 || defined __OpenBSD__ || defined __NetBSD__
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200434# undef HAVE_CLEARENV
435# undef HAVE_FDATASYNC
Dan Fandrich0e79e7b2011-06-28 23:03:27 -0700436# undef HAVE_GETLINE
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200437# undef HAVE_MNTENT_H
438# undef HAVE_PTSNAME_R
439# undef HAVE_SYS_STATFS_H
440# undef HAVE_SIGHANDLER_T
Denys Vlasenko561f9c82011-06-21 16:38:29 +0200441# undef HAVE_STRVERSCMP
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200442# undef HAVE_XTABS
443# undef HAVE_DPRINTF
Matthias Andree12854372011-08-28 05:04:07 +0200444# undef HAVE_UNLOCKED_STDIO
445# undef HAVE_UNLOCKED_LINE_OPS
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200446#endif
447
Denys Vlasenko432fbd72014-01-07 14:09:47 +0100448#if defined(__dietlibc__)
Dan Fandrich0e79e7b2011-06-28 23:03:27 -0700449# undef HAVE_STRCHRNUL
450#endif
451
Denys Vlasenko432fbd72014-01-07 14:09:47 +0100452#if defined(__APPLE__)
453# undef HAVE_STRCHRNUL
454#endif
455
456#if defined(__FreeBSD__)
Denys Vlasenko51046452015-02-02 03:51:47 +0100457/* users say mempcpy is not present in FreeBSD 9.x */
458# undef HAVE_MEMPCPY
Denys Vlasenko8e0ad262014-01-08 15:10:54 +0100459# undef HAVE_CLEARENV
460# undef HAVE_FDATASYNC
461# undef HAVE_MNTENT_H
462# undef HAVE_PTSNAME_R
463# undef HAVE_SYS_STATFS_H
464# undef HAVE_SIGHANDLER_T
465# undef HAVE_STRVERSCMP
466# undef HAVE_XTABS
467# undef HAVE_UNLOCKED_LINE_OPS
468# include <osreldate.h>
Denys Vlasenko432fbd72014-01-07 14:09:47 +0100469# if __FreeBSD_version < 1000029
Denys Vlasenko8e0ad262014-01-08 15:10:54 +0100470# undef HAVE_STRCHRNUL /* FreeBSD added strchrnul() between 1000028 and 1000029 */
Denys Vlasenko432fbd72014-01-07 14:09:47 +0100471# endif
472#endif
473
Dan Fandrich0e79e7b2011-06-28 23:03:27 -0700474#if defined(__NetBSD__)
475# define HAVE_GETLINE 1 /* Recent NetBSD versions have getline() */
476#endif
477
Denys Vlasenko89f5bfd2011-05-12 23:03:18 +0200478#if defined(__digital__) && defined(__unix__)
479# undef HAVE_STPCPY
480#endif
481
Denys Vlasenkoe0894f52011-09-09 18:00:44 +0200482#if defined(ANDROID) || defined(__ANDROID__)
Matt Whitlock778efe32015-05-03 18:59:50 +0200483# if __ANDROID_API__ < 8
484# undef HAVE_DPRINTF
485# else
486# define dprintf fdprintf
487# endif
488# if __ANDROID_API__ < 21
489# undef HAVE_TTYNAME_R
490# undef HAVE_GETLINE
491# undef HAVE_STPCPY
492# endif
Matt Whitlockf23e3ec2015-05-03 18:57:44 +0200493# undef HAVE_MEMPCPY
Dan Fandrich71d73132011-06-03 20:51:58 +0200494# undef HAVE_STRCHRNUL
Denys Vlasenko561f9c82011-06-21 16:38:29 +0200495# undef HAVE_STRVERSCMP
Dan Fandrich75214cf2011-06-30 02:59:17 +0200496# undef HAVE_UNLOCKED_LINE_OPS
Dan Fandrichf533ec82011-06-10 05:17:59 +0200497# undef HAVE_NET_ETHERNET_H
Dan Fandrich71d73132011-06-03 20:51:58 +0200498#endif
499
Dan Fandrich21a542d2009-10-27 11:05:00 +0100500/*
501 * Now, define prototypes for all the functions defined in platform.c
502 * These must come after all the HAVE_* macros are defined (or not)
503 */
504
Denys Vlasenko47061b42011-04-17 23:14:19 +0200505#ifndef HAVE_DPRINTF
506extern int dprintf(int fd, const char *format, ...);
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100507#endif
508
509#ifndef HAVE_MEMRCHR
510extern void *memrchr(const void *s, int c, size_t n) FAST_FUNC;
511#endif
512
513#ifndef HAVE_MKDTEMP
514extern char *mkdtemp(char *template) FAST_FUNC;
515#endif
516
Matt Whitlockcee59052015-04-25 21:32:48 +0200517#ifndef HAVE_TTYNAME_R
518#define ttyname_r bb_ttyname_r
519extern int ttyname_r(int fd, char *buf, size_t buflen);
520#endif
521
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100522#ifndef HAVE_SETBIT
523# define setbit(a, b) ((a)[(b) >> 3] |= 1 << ((b) & 7))
524# define clrbit(a, b) ((a)[(b) >> 3] &= ~(1 << ((b) & 7)))
525#endif
526
Chris Rees9ad97d52011-01-20 00:51:52 +0100527#ifndef HAVE_SIGHANDLER_T
528typedef void (*sighandler_t)(int);
529#endif
530
Dan Fandrichdc506762011-02-12 22:26:57 -0800531#ifndef HAVE_STPCPY
532extern char *stpcpy(char *p, const char *to_add) FAST_FUNC;
533#endif
534
Denys Vlasenko50a6d862015-01-25 22:08:46 +0100535#ifndef HAVE_MEMPCPY
Denys Vlasenko8c05a742015-01-29 16:41:48 +0100536#include <string.h>
Denys Vlasenko51046452015-02-02 03:51:47 +0100537/* In case we are wrong about !HAVE_MEMPCPY, and toolchain _does_ have
538 * mempcpy(), avoid colliding with it:
539 */
540#define mempcpy bb__mempcpy
Denys Vlasenko50a6d862015-01-25 22:08:46 +0100541static ALWAYS_INLINE void *mempcpy(void *dest, const void *src, size_t len)
542{
543 return memcpy(dest, src, len) + len;
544}
545#endif
546
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100547#ifndef HAVE_STRCASESTR
548extern char *strcasestr(const char *s, const char *pattern) FAST_FUNC;
549#endif
550
Dan Fandrich21a542d2009-10-27 11:05:00 +0100551#ifndef HAVE_STRCHRNUL
552extern char *strchrnul(const char *s, int c) FAST_FUNC;
553#endif
554
Dan Fandrich0635ddd2010-06-18 22:36:45 -0700555#ifndef HAVE_STRSEP
556extern char *strsep(char **stringp, const char *delim) FAST_FUNC;
557#endif
558
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100559#ifndef HAVE_STRSIGNAL
560/* Not exactly the same: instead of "Stopped" it shows "STOP" etc */
561# define strsignal(sig) get_signame(sig)
Dan Fandrich21a542d2009-10-27 11:05:00 +0100562#endif
563
Bernhard Reutner-Fischerad167412014-04-13 16:37:57 +0200564#ifndef HAVE_USLEEP
565extern int usleep(unsigned) FAST_FUNC;
566#endif
567
Dan Fandrichfe4e23f2009-11-01 04:01:30 +0100568#ifndef HAVE_VASPRINTF
569extern int vasprintf(char **string_ptr, const char *format, va_list p) FAST_FUNC;
Dan Fandrich21a542d2009-10-27 11:05:00 +0100570#endif
Denys Vlasenko5a49d282009-05-19 13:18:45 +0200571
Timo Teras0a5b3102011-06-29 02:19:58 +0200572#ifndef HAVE_GETLINE
Denys Vlasenko14bd16a2011-07-08 08:49:40 +0200573# include <stdio.h> /* for FILE */
574# include <sys/types.h> /* size_t */
Timo Teras0a5b3102011-06-29 02:19:58 +0200575extern ssize_t getline(char **lineptr, size_t *n, FILE *stream) FAST_FUNC;
576#endif
577
Denis Vlasenkof81e8db2009-04-09 12:35:13 +0000578#endif