Contents of /trunk/mkinitrd-magellan/busybox/include/platform.h
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (16 years, 9 months ago) by niro
File MIME type: text/plain
File size: 7709 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
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) \ |
14 | ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) |
15 | #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 | |
36 | #undef inline |
37 | #if defined(__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
38 | /* 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 | |
51 | # define ATTRIBUTE_UNUSED __attribute__ ((__unused__)) |
52 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) |
53 | # define ATTRIBUTE_PACKED __attribute__ ((__packed__)) |
54 | # define ATTRIBUTE_ALIGNED(m) __attribute__ ((__aligned__(m))) |
55 | # if __GNUC_PREREQ (3,0) |
56 | # define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline)) inline |
57 | # else |
58 | # define ATTRIBUTE_ALWAYS_INLINE inline |
59 | # endif |
60 | |
61 | /* -fwhole-program makes all symbols local. The attribute externally_visible |
62 | forces a symbol global. */ |
63 | # if __GNUC_PREREQ (4,1) |
64 | # define ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((__externally_visible__)) |
65 | # else |
66 | # define ATTRIBUTE_EXTERNALLY_VISIBLE |
67 | # endif /* GNUC >= 4.1 */ |
68 | |
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 | |
78 | /* 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 | |
86 | /* ---- Endian Detection ------------------------------------ */ |
87 | |
88 | #if (defined __digital__ && defined __unix__) |
89 | # include <sex.h> |
90 | # define __BIG_ENDIAN__ (BYTE_ORDER == BIG_ENDIAN) |
91 | # define __BYTE_ORDER BYTE_ORDER |
92 | #elif !defined __APPLE__ |
93 | # include <byteswap.h> |
94 | # include <endian.h> |
95 | #endif |
96 | |
97 | #ifdef __BIG_ENDIAN__ |
98 | # define BB_BIG_ENDIAN 1 |
99 | # define BB_LITTLE_ENDIAN 0 |
100 | #elif __BYTE_ORDER == __BIG_ENDIAN |
101 | # define BB_BIG_ENDIAN 1 |
102 | # define BB_LITTLE_ENDIAN 0 |
103 | #else |
104 | # define BB_BIG_ENDIAN 0 |
105 | # define BB_LITTLE_ENDIAN 1 |
106 | #endif |
107 | |
108 | #if BB_BIG_ENDIAN |
109 | #define SWAP_BE16(x) (x) |
110 | #define SWAP_BE32(x) (x) |
111 | #define SWAP_BE64(x) (x) |
112 | #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) |
119 | #define SWAP_LE16(x) (x) |
120 | #define SWAP_LE32(x) (x) |
121 | #define SWAP_LE64(x) (x) |
122 | #endif |
123 | |
124 | /* ---- Networking ------------------------------------------ */ |
125 | #ifndef __APPLE__ |
126 | # include <arpa/inet.h> |
127 | #else |
128 | # include <netinet/in.h> |
129 | #endif |
130 | |
131 | #ifndef __socklen_t_defined |
132 | typedef int socklen_t; |
133 | #endif |
134 | |
135 | /* ---- Compiler dependent settings ------------------------- */ |
136 | #if (defined __digital__ && defined __unix__) |
137 | # undef HAVE_MNTENT_H |
138 | #else |
139 | # define HAVE_MNTENT_H 1 |
140 | #endif /* ___digital__ && __unix__ */ |
141 | |
142 | /*----- Kernel versioning ------------------------------------*/ |
143 | #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c)) |
144 | |
145 | /* ---- miscellaneous --------------------------------------- */ |
146 | |
147 | #if defined(__GNU_LIBRARY__) && __GNU_LIBRARY__ < 5 && \ |
148 | !defined(__dietlibc__) && \ |
149 | !defined(_NEWLIB_VERSION) && \ |
150 | !(defined __digital__ && defined __unix__) |
151 | # error "Sorry, this libc version is not supported :(" |
152 | #endif |
153 | |
154 | // Don't perpetuate e2fsck crap into the headers. Clean up e2fsck instead. |
155 | |
156 | #if defined __GLIBC__ || defined __UCLIBC__ \ |
157 | || defined __dietlibc__ || defined _NEWLIB_VERSION |
158 | #include <features.h> |
159 | #define HAVE_FEATURES_H |
160 | #include <stdint.h> |
161 | #define HAVE_STDINT_H |
162 | #else |
163 | /* Largest integral types. */ |
164 | #if __BIG_ENDIAN__ |
165 | typedef long int intmax_t; |
166 | typedef unsigned long int uintmax_t; |
167 | #else |
168 | __extension__ |
169 | typedef long long int intmax_t; |
170 | __extension__ |
171 | typedef unsigned long long int uintmax_t; |
172 | #endif |
173 | #endif |
174 | |
175 | /* Size-saving "small" ints (arch-dependent) */ |
176 | #if defined(i386) || defined(__x86_64__) || defined(__mips__) || defined(__cris__) |
177 | /* add other arches which benefit from this... */ |
178 | typedef signed char smallint; |
179 | typedef unsigned char smalluint; |
180 | #else |
181 | /* for arches where byte accesses generate larger code: */ |
182 | typedef int smallint; |
183 | typedef unsigned smalluint; |
184 | #endif |
185 | |
186 | /* uclibc does not implement daemon() for no-mmu systems. |
187 | * For 0.9.29 and svn, __ARCH_USE_MMU__ indicates no-mmu reliably. |
188 | * For earlier versions there is no reliable way to check if we are building |
189 | * for a mmu-less system; the user should pass EXTRA_CFLAGS="-DBB_NOMMU" |
190 | * on his own. |
191 | */ |
192 | #if defined __UCLIBC__ && __UCLIBC_MAJOR__ >= 0 && __UCLIBC_MINOR__ >= 9 && \ |
193 | __UCLIBC_SUBLEVEL__ > 28 && !defined __ARCH_USE_MMU__ |
194 | #define BB_NOMMU |
195 | #endif |
196 | |
197 | /* Platforms that haven't got dprintf need to implement fdprintf() in |
198 | * libbb. This would require a platform.c. It's not going to be cleaned |
199 | * out of the tree, so stop saying it should be. */ |
200 | #if !defined(__dietlibc__) |
201 | /* Needed for: glibc */ |
202 | /* Not needed for: dietlibc */ |
203 | /* Others: ?? (add as needed) */ |
204 | #define fdprintf dprintf |
205 | #endif |
206 | |
207 | #if defined(__dietlibc__) |
208 | static ATTRIBUTE_ALWAYS_INLINE char* strchrnul(const char *s, char c) { |
209 | while (*s && *s != c) ++s; |
210 | return (char*)s; |
211 | } |
212 | #endif |
213 | |
214 | /* Don't use lchown with glibc older than 2.1.x ... uC-libc lacks it */ |
215 | #if (defined __GLIBC__ && __GLIBC__ <= 2 && __GLIBC_MINOR__ < 1) || \ |
216 | defined __UC_LIBC__ |
217 | # define lchown chown |
218 | #endif |
219 | |
220 | /* THIS SHOULD BE CLEANED OUT OF THE TREE ENTIRELY */ |
221 | /* FIXME: fix tar.c! */ |
222 | #ifndef FNM_LEADING_DIR |
223 | #define FNM_LEADING_DIR 0 |
224 | #endif |
225 | |
226 | #if (defined __digital__ && defined __unix__) |
227 | #include <standards.h> |
228 | #define HAVE_STANDARDS_H |
229 | #include <inttypes.h> |
230 | #define HAVE_INTTYPES_H |
231 | #define PRIu32 "u" |
232 | |
233 | /* use legacy setpgrp(pidt_,pid_t) for now. move to platform.c */ |
234 | #define bb_setpgrp do { pid_t __me = getpid(); setpgrp(__me,__me); } while (0) |
235 | |
236 | #if !defined ADJ_OFFSET_SINGLESHOT && defined MOD_CLKA && defined MOD_OFFSET |
237 | #define ADJ_OFFSET_SINGLESHOT (MOD_CLKA | MOD_OFFSET) |
238 | #endif |
239 | #if !defined ADJ_FREQUENCY && defined MOD_FREQUENCY |
240 | #define ADJ_FREQUENCY MOD_FREQUENCY |
241 | #endif |
242 | #if !defined ADJ_TIMECONST && defined MOD_TIMECONST |
243 | #define ADJ_TIMECONST MOD_TIMECONST |
244 | #endif |
245 | #if !defined ADJ_TICK && defined MOD_CLKB |
246 | #define ADJ_TICK MOD_CLKB |
247 | #endif |
248 | |
249 | #else |
250 | #define bb_setpgrp setpgrp() |
251 | #endif |
252 | |
253 | #if defined(__linux__) |
254 | #include <sys/mount.h> |
255 | // Make sure we have all the new mount flags we actually try to use. |
256 | #ifndef MS_BIND |
257 | #define MS_BIND (1<<12) |
258 | #endif |
259 | #ifndef MS_MOVE |
260 | #define MS_MOVE (1<<13) |
261 | #endif |
262 | #ifndef MS_RECURSIVE |
263 | #define MS_RECURSIVE (1<<14) |
264 | #endif |
265 | #ifndef MS_SILENT |
266 | #define MS_SILENT (1<<15) |
267 | #endif |
268 | |
269 | // The shared subtree stuff, which went in around 2.6.15 |
270 | #ifndef MS_UNBINDABLE |
271 | #define MS_UNBINDABLE (1<<17) |
272 | #endif |
273 | #ifndef MS_PRIVATE |
274 | #define MS_PRIVATE (1<<18) |
275 | #endif |
276 | #ifndef MS_SLAVE |
277 | #define MS_SLAVE (1<<19) |
278 | #endif |
279 | #ifndef MS_SHARED |
280 | #define MS_SHARED (1<<20) |
281 | #endif |
282 | |
283 | |
284 | #if !defined(BLKSSZGET) |
285 | #define BLKSSZGET _IO(0x12, 104) |
286 | #endif |
287 | #if !defined(BLKGETSIZE64) |
288 | #define BLKGETSIZE64 _IOR(0x12,114,size_t) |
289 | #endif |
290 | #endif |
291 | |
292 | #endif /* platform.h */ |