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Bernhard Reutner-Fischerb1629b12006-05-19 19:29:19 +00001/* vi: set sw=4 ts=4: */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +00002/*
3 Copyright 2006, Bernhard Fischer
4
5 Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
6*/
7#ifndef __PLATFORM_H
8#define __PLATFORM_H 1
9
10/* Convenience macros to test the version of gcc. */
11#undef __GNUC_PREREQ
12#if defined __GNUC__ && defined __GNUC_MINOR__
13# define __GNUC_PREREQ(maj, min) \
Denis Vlasenko9213a9e2006-09-17 16:28:10 +000014 ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000015#else
16# define __GNUC_PREREQ(maj, min) 0
17#endif
18
19/* __restrict is known in EGCS 1.2 and above. */
20#if !__GNUC_PREREQ (2,92)
21# ifndef __restrict
22# define __restrict /* Ignore */
23# endif
24#endif
25
26/* Define macros for some gcc attributes. This permits us to use the
27 macros freely, and know that they will come into play for the
28 version of gcc in which they are supported. */
29
30#if !__GNUC_PREREQ (2,7)
31# ifndef __attribute__
32# define __attribute__(x)
33# endif
34#endif
35
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000036#undef inline
Denis Vlasenkoa7189f02006-11-17 20:29:00 +000037#if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000038/* it's a keyword */
39#else
40# if __GNUC_PREREQ (2,7)
41# define inline __inline__
42# else
43# define inline
44# endif
45#endif
46
47#ifndef __const
48# define __const const
49#endif
50
Mike Frysingerf8855132006-03-28 02:35:56 +000051# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
Mike Frysingerf8855132006-03-28 02:35:56 +000052# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
Mike Frysingerf8855132006-03-28 02:35:56 +000053# define ATTRIBUTE_PACKED __attribute__ ((__packed__))
Mike Frysingerf8855132006-03-28 02:35:56 +000054# define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m)))
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000055# if __GNUC_PREREQ (3,0)
56# define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline
57# else
58# define ATTRIBUTE_ALWAYS_INLINE inline
59# endif
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000060
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000061/* -fwhole-program makes all symbols local. The attribute externally_visible
62 forces a symbol global. */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000063# if __GNUC_PREREQ (4,1)
Mike Frysingerf8855132006-03-28 02:35:56 +000064# define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000065# else
Mike Frysingerf8855132006-03-28 02:35:56 +000066# define ATTRIBUTE_EXTERNALLY_VISIBLE
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000067# endif /* GNUC >= 4.1 */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000068
69/* We use __extension__ in some places to suppress -pedantic warnings
70 about GCC extensions. This feature didn't work properly before
71 gcc 2.8. */
72#if !__GNUC_PREREQ (2,8)
73# ifndef __extension__
74# define __extension__
75# endif
76#endif
77
Bernhard Reutner-Fischerb5f50ea2006-09-12 13:27:55 +000078/* gcc-2.95 had no va_copy but only __va_copy. */
79#if !__GNUC_PREREQ (3,0)
80# include <stdarg.h>
81# if !defined va_copy && defined __va_copy
82# define va_copy(d,s) __va_copy((d),(s))
83# endif
84#endif
85
Rob Landley5cf7c2d2006-02-21 06:44:43 +000086/* ---- Endian Detection ------------------------------------ */
Rob Landley5cf7c2d2006-02-21 06:44:43 +000087
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000088#if (defined __digital__ && defined __unix__)
89# include <sex.h>
90# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
91# define __BYTE_ORDER BYTE_ORDER
Rob Landley15d20a02006-05-29 05:00:44 +000092#elif !defined __APPLE__
93# include <byteswap.h>
94# include <endian.h>
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000095#endif
96
Rob Landley5cf7c2d2006-02-21 06:44:43 +000097#ifdef __BIG_ENDIAN__
Mike Frysingerf8855132006-03-28 02:35:56 +000098# define BB_BIG_ENDIAN 1
99# define BB_LITTLE_ENDIAN 0
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000100#elif __BYTE_ORDER == __BIG_ENDIAN
Mike Frysingerf8855132006-03-28 02:35:56 +0000101# define BB_BIG_ENDIAN 1
102# define BB_LITTLE_ENDIAN 0
Bernhard Reutner-Fischered7bb622006-02-23 14:25:15 +0000103#else
Mike Frysingerf8855132006-03-28 02:35:56 +0000104# define BB_BIG_ENDIAN 0
105# define BB_LITTLE_ENDIAN 1
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000106#endif
107
Rob Landleybba7f082006-05-29 05:51:12 +0000108#if BB_BIG_ENDIAN
Rob Landley752f0a62006-05-30 06:28:03 +0000109#define SWAP_BE16(x) (x)
110#define SWAP_BE32(x) (x)
111#define SWAP_BE64(x) (x)
Rob Landleybba7f082006-05-29 05:51:12 +0000112#define SWAP_LE16(x) bswap_16(x)
113#define SWAP_LE32(x) bswap_32(x)
114#define SWAP_LE64(x) bswap_64(x)
115#else
116#define SWAP_BE16(x) bswap_16(x)
117#define SWAP_BE32(x) bswap_32(x)
118#define SWAP_BE64(x) bswap_64(x)
Rob Landley752f0a62006-05-30 06:28:03 +0000119#define SWAP_LE16(x) (x)
120#define SWAP_LE32(x) (x)
121#define SWAP_LE64(x) (x)
Rob Landleybba7f082006-05-29 05:51:12 +0000122#endif
123
Rob Landleydae6aa22006-03-09 22:39:08 +0000124/* ---- Networking ------------------------------------------ */
125#ifndef __APPLE__
Mike Frysingerf8855132006-03-28 02:35:56 +0000126# include <arpa/inet.h>
Rob Landleydae6aa22006-03-09 22:39:08 +0000127#else
Mike Frysingerf8855132006-03-28 02:35:56 +0000128# include <netinet/in.h>
Rob Landleydae6aa22006-03-09 22:39:08 +0000129#endif
130
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000131#ifndef __socklen_t_defined
132typedef int socklen_t;
133#endif
134
135/* ---- Compiler dependent settings ------------------------- */
136#ifndef __GNUC__
137#if defined __INTEL_COMPILER
138__extension__ typedef __signed__ long long __s64;
139__extension__ typedef unsigned long long __u64;
140#endif /* __INTEL_COMPILER */
141#endif /* ifndef __GNUC__ */
142
143#if (defined __digital__ && defined __unix__)
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000144# undef HAVE_MNTENT_H
145#else
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000146# define HAVE_MNTENT_H 1
147#endif /* ___digital__ && __unix__ */
148
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000149/*----- Kernel versioning ------------------------------------*/
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000150#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000151
Bernhard Reutner-Fischered7bb622006-02-23 14:25:15 +0000152/* ---- miscellaneous --------------------------------------- */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000153
Mike Frysingerb16b5bb2006-06-06 06:00:20 +0000154#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000155 !defined(__dietlibc__) && \
156 !defined(_NEWLIB_VERSION) && \
157 !(defined __digital__ && defined __unix__)
Mike Frysingerb16b5bb2006-06-06 06:00:20 +0000158# error "Sorry, this libc version is not supported :("
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000159#endif
160
Rob Landley18958e92006-06-13 18:28:33 +0000161// Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead.
162
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000163#if defined __GLIBC__ || defined __UCLIBC__ \
164 || defined __dietlibc__ || defined _NEWLIB_VERSION
165#include <features.h>
166#define HAVE_FEATURES_H
167#include <stdint.h>
168#define HAVE_STDINT_H
169#else
170/* Largest integral types. */
171#if __BIG_ENDIAN__
172typedef long int intmax_t;
173typedef unsigned long int uintmax_t;
174#else
175__extension__
176typedef long long int intmax_t;
177__extension__
178typedef unsigned long long int uintmax_t;
179#endif
180#endif
181
Mike Frysinger88407592006-07-20 19:31:07 +0000182/* uclibc does not implement daemon() for no-mmu systems.
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000183 * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
184 * For earlier versions there is no reliable way to check if we are building
Rob Landley1fa4a942006-06-22 22:05:00 +0000185 * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000186 * on his own.
187 */
188#if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
189 __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
190#define BB_NOMMU
191#endif
192
Rob Landley18958e92006-06-13 18:28:33 +0000193/* Platforms that haven't got dprintf need to implement fdprintf() in
194 * libbb. This would require a platform.c. It's not going to be cleaned
195 * out of the tree, so stop saying it should be. */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000196#define fdprintf dprintf
Rob Landleyc020f5f2006-05-21 18:28:13 +0000197
Mike Frysinger88407592006-07-20 19:31:07 +0000198/* Don't use lchown with glibc older then 2.1.x ... uC-libc lacks it */
199#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
200 defined __UC_LIBC__
201# define lchown chown
202#endif
203
Bernhard Reutner-Fischer4ed1f1d2006-05-26 13:34:25 +0000204/* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
205/* FIXME: fix tar.c! */
206#ifndef FNM_LEADING_DIR
207#define FNM_LEADING_DIR 0
208#endif
209
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000210#if (defined __digital__ && defined __unix__)
Rob Landley18958e92006-06-13 18:28:33 +0000211#include <standards.h>
212#define HAVE_STANDARDS_H
213#include <inttypes.h>
214#define HAVE_INTTYPES_H
215#define PRIu32 "u"
Rob Landley8fba99f2006-05-27 22:08:01 +0000216
Rob Landley18958e92006-06-13 18:28:33 +0000217/* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */
218#define bb_setpgrp do{pid_t __me = getpid();setpgrp(__me,__me);}while(0)
219
Rob Landley8fba99f2006-05-27 22:08:01 +0000220#if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
221#define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
222#endif
223#if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
224#define ADJ_FREQUENCY MOD_FREQUENCY
225#endif
226#if !defined ADJ_TIMECONST && defined MOD_TIMECONST
227#define ADJ_TIMECONST MOD_TIMECONST
228#endif
229#if !defined ADJ_TICK && defined MOD_CLKB
230#define ADJ_TICK MOD_CLKB
231#endif
232
Rob Landley18958e92006-06-13 18:28:33 +0000233#else
234#define bb_setpgrp setpgrp()
235#endif
236
Rob Landley22d26fc2006-06-15 15:49:36 +0000237#if defined(__linux__)
238#include <sys/mount.h>
Rob Landleye3781b72006-08-08 01:39:49 +0000239// Make sure we have all the new mount flags we actually try to use.
240#ifndef MS_BIND
241#define MS_BIND (1<<12)
242#endif
243#ifndef MS_MOVE
244#define MS_MOVE (1<<13)
245#endif
246#ifndef MS_RECURSIVE
247#define MS_RECURSIVE (1<<14)
248#endif
249#ifndef MS_SILENT
250#define MS_SILENT (1<<15)
251#endif
252
253// The shared subtree stuff, which went in around 2.6.15
254#ifndef MS_UNBINDABLE
255#define MS_UNBINDABLE (1<<17)
256#endif
257#ifndef MS_PRIVATE
258#define MS_PRIVATE (1<<18)
259#endif
260#ifndef MS_SLAVE
261#define MS_SLAVE (1<<19)
262#endif
263#ifndef MS_SHARED
264#define MS_SHARED (1<<20)
265#endif
266
Denis Vlasenko9213a9e2006-09-17 16:28:10 +0000267
Rob Landley7077ea32006-06-29 19:00:12 +0000268#if !defined(BLKSSZGET)
269#define BLKSSZGET _IO(0x12, 104)
270#endif
Rob Landley22d26fc2006-06-15 15:49:36 +0000271#if !defined(BLKGETSIZE64)
Rob Landley18958e92006-06-13 18:28:33 +0000272#define BLKGETSIZE64 _IOR(0x12,114,size_t)
273#endif
Rob Landley22d26fc2006-06-15 15:49:36 +0000274#endif
Rob Landley18958e92006-06-13 18:28:33 +0000275
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +0000276#endif /* platform.h */