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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
Bernhard Reutner-Fischer51f7ab62007-04-10 18:40:05 +000057# define ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000058# else
59# define ATTRIBUTE_ALWAYS_INLINE inline
Bernhard Reutner-Fischer51f7ab62007-04-10 18:40:05 +000060# define ATTRIBUTE_DEPRECATED /* n/a */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000061# endif
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000062
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000063/* -fwhole-program makes all symbols local. The attribute externally_visible
64 forces a symbol global. */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000065# if __GNUC_PREREQ (4,1)
Mike Frysingerf8855132006-03-28 02:35:56 +000066# define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__))
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000067# else
Mike Frysingerf8855132006-03-28 02:35:56 +000068# define ATTRIBUTE_EXTERNALLY_VISIBLE
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000069# endif /* GNUC >= 4.1 */
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +000070
71/* We use __extension__ in some places to suppress -pedantic warnings
72 about GCC extensions. This feature didn't work properly before
73 gcc 2.8. */
74#if !__GNUC_PREREQ (2,8)
75# ifndef __extension__
76# define __extension__
77# endif
78#endif
79
Bernhard Reutner-Fischerb5f50ea2006-09-12 13:27:55 +000080/* gcc-2.95 had no va_copy but only __va_copy. */
81#if !__GNUC_PREREQ (3,0)
82# include <stdarg.h>
83# if !defined va_copy && defined __va_copy
84# define va_copy(d,s) __va_copy((d),(s))
85# endif
86#endif
87
Rob Landley5cf7c2d2006-02-21 06:44:43 +000088/* ---- Endian Detection ------------------------------------ */
Rob Landley5cf7c2d2006-02-21 06:44:43 +000089
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000090#if (defined __digital__ && defined __unix__)
91# include <sex.h>
92# define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN)
93# define __BYTE_ORDER BYTE_ORDER
Rob Landley15d20a02006-05-29 05:00:44 +000094#elif !defined __APPLE__
95# include <byteswap.h>
96# include <endian.h>
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +000097#endif
98
Rob Landley5cf7c2d2006-02-21 06:44:43 +000099#ifdef __BIG_ENDIAN__
Mike Frysingerf8855132006-03-28 02:35:56 +0000100# define BB_BIG_ENDIAN 1
101# define BB_LITTLE_ENDIAN 0
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000102#elif __BYTE_ORDER == __BIG_ENDIAN
Mike Frysingerf8855132006-03-28 02:35:56 +0000103# define BB_BIG_ENDIAN 1
104# define BB_LITTLE_ENDIAN 0
Bernhard Reutner-Fischered7bb622006-02-23 14:25:15 +0000105#else
Mike Frysingerf8855132006-03-28 02:35:56 +0000106# define BB_BIG_ENDIAN 0
107# define BB_LITTLE_ENDIAN 1
Rob Landley5cf7c2d2006-02-21 06:44:43 +0000108#endif
109
Rob Landleybba7f082006-05-29 05:51:12 +0000110#if BB_BIG_ENDIAN
Rob Landley752f0a62006-05-30 06:28:03 +0000111#define SWAP_BE16(x) (x)
112#define SWAP_BE32(x) (x)
113#define SWAP_BE64(x) (x)
Rob Landleybba7f082006-05-29 05:51:12 +0000114#define SWAP_LE16(x) bswap_16(x)
115#define SWAP_LE32(x) bswap_32(x)
116#define SWAP_LE64(x) bswap_64(x)
117#else
118#define SWAP_BE16(x) bswap_16(x)
119#define SWAP_BE32(x) bswap_32(x)
120#define SWAP_BE64(x) bswap_64(x)
Rob Landley752f0a62006-05-30 06:28:03 +0000121#define SWAP_LE16(x) (x)
122#define SWAP_LE32(x) (x)
123#define SWAP_LE64(x) (x)
Rob Landleybba7f082006-05-29 05:51:12 +0000124#endif
125
Rob Landleydae6aa22006-03-09 22:39:08 +0000126/* ---- Networking ------------------------------------------ */
127#ifndef __APPLE__
Mike Frysingerf8855132006-03-28 02:35:56 +0000128# include <arpa/inet.h>
Rob Landleydae6aa22006-03-09 22:39:08 +0000129#else
Mike Frysingerf8855132006-03-28 02:35:56 +0000130# include <netinet/in.h>
Rob Landleydae6aa22006-03-09 22:39:08 +0000131#endif
132
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000133#ifndef __socklen_t_defined
134typedef int socklen_t;
135#endif
136
137/* ---- Compiler dependent settings ------------------------- */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000138#if (defined __digital__ && defined __unix__)
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000139# undef HAVE_MNTENT_H
140#else
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000141# define HAVE_MNTENT_H 1
142#endif /* ___digital__ && __unix__ */
143
Bernhard Reutner-Fischerbe862092007-03-19 15:15:06 +0000144/* linux/loop.h relies on __u64. Make sure we have that as a proper type
145 * until userspace is widely fixed. */
146#ifndef __GNUC__
147#if defined __INTEL_COMPILER
148__extension__ typedef __signed__ long long __s64;
149__extension__ typedef unsigned long long __u64;
150#endif /* __INTEL_COMPILER */
151#endif /* ifndef __GNUC__ */
152
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000153/*----- Kernel versioning ------------------------------------*/
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000154#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
Bernhard Reutner-Fischere2e56c72006-05-19 11:54:02 +0000155
Bernhard Reutner-Fischered7bb622006-02-23 14:25:15 +0000156/* ---- miscellaneous --------------------------------------- */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000157
Mike Frysingerb16b5bb2006-06-06 06:00:20 +0000158#if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000159 !defined(__dietlibc__) && \
160 !defined(_NEWLIB_VERSION) && \
161 !(defined __digital__ && defined __unix__)
Mike Frysingerb16b5bb2006-06-06 06:00:20 +0000162# error "Sorry, this libc version is not supported :("
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000163#endif
164
Rob Landley18958e92006-06-13 18:28:33 +0000165// Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead.
166
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000167#if defined __GLIBC__ || defined __UCLIBC__ \
168 || defined __dietlibc__ || defined _NEWLIB_VERSION
169#include <features.h>
170#define HAVE_FEATURES_H
171#include <stdint.h>
172#define HAVE_STDINT_H
173#else
174/* Largest integral types. */
175#if __BIG_ENDIAN__
176typedef long int intmax_t;
177typedef unsigned long int uintmax_t;
178#else
179__extension__
180typedef long long int intmax_t;
181__extension__
182typedef unsigned long long int uintmax_t;
183#endif
184#endif
185
Bernhard Reutner-Fischerc966ba42007-01-18 10:32:09 +0000186/* Size-saving "small" ints (arch-dependent) */
187#if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__)
188/* add other arches which benefit from this... */
189typedef signed char smallint;
190typedef unsigned char smalluint;
191#else
192/* for arches where byte accesses generate larger code: */
193typedef int smallint;
194typedef unsigned smalluint;
195#endif
196
Bernhard Reutner-Fischera8e2e182007-01-20 21:27:18 +0000197/* ISO C Standard: 7.16 Boolean type and values <stdbool.h> */
198#if (defined __digital__ && defined __unix__)
199/* old system without (proper) C99 support */
200#define bool smalluint
201#else
202/* modern system, so use it */
203#include <stdbool.h>
204#endif
205
206
Mike Frysinger88407592006-07-20 19:31:07 +0000207/* uclibc does not implement daemon() for no-mmu systems.
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000208 * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably.
209 * For earlier versions there is no reliable way to check if we are building
Rob Landley1fa4a942006-06-22 22:05:00 +0000210 * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU"
Bernhard Reutner-Fischer507cd752006-05-31 10:04:03 +0000211 * on his own.
212 */
213#if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \
214 __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__
215#define BB_NOMMU
216#endif
217
Rob Landley18958e92006-06-13 18:28:33 +0000218/* Platforms that haven't got dprintf need to implement fdprintf() in
219 * libbb. This would require a platform.c. It's not going to be cleaned
220 * out of the tree, so stop saying it should be. */
Denis Vlasenko7cfecc42006-12-18 22:32:45 +0000221#if !defined(__dietlibc__)
222/* Needed for: glibc */
223/* Not needed for: dietlibc */
224/* Others: ?? (add as needed) */
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000225#define fdprintf dprintf
Denis Vlasenko7cfecc42006-12-18 22:32:45 +0000226#endif
227
228#if defined(__dietlibc__)
229static ATTRIBUTE_ALWAYS_INLINE char* strchrnul(const char *s, char c) {
230 while (*s && *s != c) ++s;
231 return (char*)s;
232}
Denis Vlasenkoc8e6e352006-12-18 22:10:24 +0000233#endif
Rob Landleyc020f5f2006-05-21 18:28:13 +0000234
Denis Vlasenkoa597aad2006-12-16 23:48:13 +0000235/* Don't use lchown with glibc older than 2.1.x ... uC-libc lacks it */
Mike Frysinger88407592006-07-20 19:31:07 +0000236#if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \
237 defined __UC_LIBC__
238# define lchown chown
239#endif
240
Bernhard Reutner-Fischer4ed1f1d2006-05-26 13:34:25 +0000241/* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */
242/* FIXME: fix tar.c! */
243#ifndef FNM_LEADING_DIR
244#define FNM_LEADING_DIR 0
245#endif
246
Bernhard Reutner-Fischere00fc162006-05-26 13:10:10 +0000247#if (defined __digital__ && defined __unix__)
Rob Landley18958e92006-06-13 18:28:33 +0000248#include <standards.h>
249#define HAVE_STANDARDS_H
250#include <inttypes.h>
251#define HAVE_INTTYPES_H
252#define PRIu32 "u"
Rob Landley8fba99f2006-05-27 22:08:01 +0000253
Rob Landley18958e92006-06-13 18:28:33 +0000254/* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */
Denis Vlasenkobf0a2012006-12-26 10:42:51 +0000255#define bb_setpgrp do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0)
Rob Landley18958e92006-06-13 18:28:33 +0000256
Rob Landley8fba99f2006-05-27 22:08:01 +0000257#if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET
258#define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET)
259#endif
260#if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY
261#define ADJ_FREQUENCY MOD_FREQUENCY
262#endif
263#if !defined ADJ_TIMECONST && defined MOD_TIMECONST
264#define ADJ_TIMECONST MOD_TIMECONST
265#endif
266#if !defined ADJ_TICK && defined MOD_CLKB
267#define ADJ_TICK MOD_CLKB
268#endif
269
Rob Landley18958e92006-06-13 18:28:33 +0000270#else
271#define bb_setpgrp setpgrp()
272#endif
273
Rob Landley22d26fc2006-06-15 15:49:36 +0000274#if defined(__linux__)
275#include <sys/mount.h>
Rob Landleye3781b72006-08-08 01:39:49 +0000276// Make sure we have all the new mount flags we actually try to use.
277#ifndef MS_BIND
278#define MS_BIND (1<<12)
279#endif
280#ifndef MS_MOVE
281#define MS_MOVE (1<<13)
282#endif
283#ifndef MS_RECURSIVE
284#define MS_RECURSIVE (1<<14)
285#endif
286#ifndef MS_SILENT
287#define MS_SILENT (1<<15)
288#endif
289
290// The shared subtree stuff, which went in around 2.6.15
291#ifndef MS_UNBINDABLE
292#define MS_UNBINDABLE (1<<17)
293#endif
294#ifndef MS_PRIVATE
295#define MS_PRIVATE (1<<18)
296#endif
297#ifndef MS_SLAVE
298#define MS_SLAVE (1<<19)
299#endif
300#ifndef MS_SHARED
301#define MS_SHARED (1<<20)
302#endif
303
Denis Vlasenko9213a9e2006-09-17 16:28:10 +0000304
Rob Landley7077ea32006-06-29 19:00:12 +0000305#if !defined(BLKSSZGET)
306#define BLKSSZGET _IO(0x12, 104)
307#endif
Rob Landley22d26fc2006-06-15 15:49:36 +0000308#if !defined(BLKGETSIZE64)
Rob Landley18958e92006-06-13 18:28:33 +0000309#define BLKGETSIZE64 _IOR(0x12,114,size_t)
310#endif
Rob Landley22d26fc2006-06-15 15:49:36 +0000311#endif
Rob Landley18958e92006-06-13 18:28:33 +0000312
Bernhard Reutner-Fischer86f5c992006-01-22 22:55:11 +0000313#endif /* platform.h */