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Commit | Line | Data |
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03557b9a PM |
1 | /* |
2 | * OS includes and handling of OS dependencies | |
3 | * | |
4 | * This header exists to pull in some common system headers that | |
5 | * most code in QEMU will want, and to fix up some possible issues with | |
6 | * it (missing defines, Windows weirdness, and so on). | |
7 | * | |
8 | * To avoid getting into possible circular include dependencies, this | |
9 | * file should not include any other QEMU headers, with the exceptions | |
da34e65c MA |
10 | * of config-host.h, config-target.h, qemu/compiler.h, |
11 | * sysemu/os-posix.h, sysemu/os-win32.h, glib-compat.h and | |
12 | * qemu/typedefs.h, all of which are doing a similar job to this file | |
13 | * and are under similar constraints. | |
03557b9a PM |
14 | * |
15 | * This header also contains prototypes for functions defined in | |
16 | * os-*.c and util/oslib-*.c; those would probably be better split | |
17 | * out into separate header files. | |
18 | * | |
19 | * In an ideal world this header would contain only: | |
20 | * (1) things which everybody needs | |
21 | * (2) things without which code would work on most platforms but | |
22 | * fail to compile or misbehave on a minority of host OSes | |
23 | * | |
24 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
25 | * See the COPYING file in the top-level directory. | |
26 | */ | |
ea88812f FB |
27 | #ifndef QEMU_OSDEP_H |
28 | #define QEMU_OSDEP_H | |
29 | ||
9adea5f7 | 30 | #include "config-host.h" |
b1e34d1c | 31 | #ifdef NEED_CPU_H |
2becc36a | 32 | #include CONFIG_TARGET |
bdd90227 PB |
33 | #else |
34 | #include "exec/poison.h" | |
b1e34d1c | 35 | #endif |
a1a98357 | 36 | |
49120868 | 37 | #include "qemu/compiler.h" |
d5db2ec1 | 38 | |
79f56d82 PM |
39 | /* Older versions of C++ don't get definitions of various macros from |
40 | * stdlib.h unless we define these macros before first inclusion of | |
41 | * that system header. | |
42 | */ | |
43 | #ifndef __STDC_CONSTANT_MACROS | |
44 | #define __STDC_CONSTANT_MACROS | |
45 | #endif | |
46 | #ifndef __STDC_LIMIT_MACROS | |
47 | #define __STDC_LIMIT_MACROS | |
48 | #endif | |
49 | #ifndef __STDC_FORMAT_MACROS | |
50 | #define __STDC_FORMAT_MACROS | |
51 | #endif | |
52 | ||
d5db2ec1 PM |
53 | /* The following block of code temporarily renames the daemon() function so the |
54 | * compiler does not see the warning associated with it in stdlib.h on OSX | |
55 | */ | |
56 | #ifdef __APPLE__ | |
57 | #define daemon qemu_fake_daemon_function | |
58 | #include <stdlib.h> | |
59 | #undef daemon | |
875df03b | 60 | QEMU_EXTERN_C int daemon(int, int); |
d5db2ec1 PM |
61 | #endif |
62 | ||
007e722c MAL |
63 | #ifdef _WIN32 |
64 | /* as defined in sdkddkver.h */ | |
56cdca1d MAL |
65 | #ifndef _WIN32_WINNT |
66 | #define _WIN32_WINNT 0x0600 /* Vista */ | |
007e722c MAL |
67 | #endif |
68 | /* reduces the number of implicitly included headers */ | |
69 | #ifndef WIN32_LEAN_AND_MEAN | |
70 | #define WIN32_LEAN_AND_MEAN | |
71 | #endif | |
72 | #endif | |
73 | ||
946376c2 CJ |
74 | /* enable C99/POSIX format strings (needs mingw32-runtime 3.15 or later) */ |
75 | #ifdef __MINGW32__ | |
76 | #define __USE_MINGW_ANSI_STDIO 1 | |
77 | #endif | |
78 | ||
ea88812f | 79 | #include <stdarg.h> |
de5071c5 | 80 | #include <stddef.h> |
0f66998f | 81 | #include <stdbool.h> |
a2b257d6 | 82 | #include <stdint.h> |
128ab2ff | 83 | #include <sys/types.h> |
bfe7e449 PM |
84 | #include <stdlib.h> |
85 | #include <stdio.h> | |
007e722c | 86 | |
bfe7e449 PM |
87 | #include <string.h> |
88 | #include <strings.h> | |
89 | #include <inttypes.h> | |
90 | #include <limits.h> | |
4d9310f4 DB |
91 | /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r |
92 | * function availability on recentish Mingw-w64 platforms. */ | |
93 | #include <unistd.h> | |
bfe7e449 PM |
94 | #include <time.h> |
95 | #include <ctype.h> | |
96 | #include <errno.h> | |
bfe7e449 | 97 | #include <fcntl.h> |
d339d766 | 98 | #include <getopt.h> |
bfe7e449 PM |
99 | #include <sys/stat.h> |
100 | #include <sys/time.h> | |
101 | #include <assert.h> | |
e89fdafb SW |
102 | /* setjmp must be declared before sysemu/os-win32.h |
103 | * because it is redefined there. */ | |
104 | #include <setjmp.h> | |
bfe7e449 PM |
105 | #include <signal.h> |
106 | ||
ec63ca2d PM |
107 | #ifdef CONFIG_IOVEC |
108 | #include <sys/uio.h> | |
109 | #endif | |
110 | ||
111 | #if defined(__linux__) && defined(__sparc__) | |
112 | /* The SPARC definition of QEMU_VMALLOC_ALIGN needs SHMLBA */ | |
113 | #include <sys/shm.h> | |
114 | #endif | |
115 | ||
13c7b2da PB |
116 | #ifndef _WIN32 |
117 | #include <sys/wait.h> | |
118 | #else | |
119 | #define WIFEXITED(x) 1 | |
120 | #define WEXITSTATUS(x) (x) | |
121 | #endif | |
122 | ||
ec63ca2d PM |
123 | #ifdef __APPLE__ |
124 | #include <AvailabilityMacros.h> | |
125 | #endif | |
126 | ||
af1bb59c PB |
127 | /* |
128 | * This is somewhat like a system header; it must be outside any extern "C" | |
129 | * block because it includes system headers itself, including glib.h, | |
130 | * which will not compile if inside an extern "C" block. | |
131 | */ | |
132 | #include "glib-compat.h" | |
133 | ||
bfe7e449 PM |
134 | #ifdef _WIN32 |
135 | #include "sysemu/os-win32.h" | |
136 | #endif | |
137 | ||
138 | #ifdef CONFIG_POSIX | |
139 | #include "sysemu/os-posix.h" | |
140 | #endif | |
f7b4a940 | 141 | |
415a9fb8 PM |
142 | #ifdef __cplusplus |
143 | extern "C" { | |
144 | #endif | |
145 | ||
da34e65c | 146 | #include "qemu/typedefs.h" |
57cb38b3 | 147 | |
3ebee3b1 RH |
148 | /* |
149 | * For mingw, as of v6.0.0, the function implementing the assert macro is | |
150 | * not marked as noreturn, so the compiler cannot delete code following an | |
151 | * assert(false) as unused. We rely on this within the code base to delete | |
152 | * code that is unreachable when features are disabled. | |
153 | * All supported versions of Glib's g_assert() satisfy this requirement. | |
154 | */ | |
155 | #ifdef __MINGW32__ | |
156 | #undef assert | |
157 | #define assert(x) g_assert(x) | |
158 | #endif | |
159 | ||
28012e19 MT |
160 | /* |
161 | * According to waitpid man page: | |
162 | * WCOREDUMP | |
163 | * This macro is not specified in POSIX.1-2001 and is not | |
164 | * available on some UNIX implementations (e.g., AIX, SunOS). | |
165 | * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif. | |
166 | */ | |
167 | #ifndef WCOREDUMP | |
168 | #define WCOREDUMP(status) 0 | |
169 | #endif | |
262a69f4 EB |
170 | /* |
171 | * We have a lot of unaudited code that may fail in strange ways, or | |
172 | * even be a security risk during migration, if you disable assertions | |
173 | * at compile-time. You may comment out these safety checks if you | |
174 | * absolutely want to disable assertion overhead, but it is not | |
175 | * supported upstream so the risk is all yours. Meanwhile, please | |
176 | * submit patches to remove any side-effects inside an assertion, or | |
177 | * fixing error handling that should use Error instead of assert. | |
178 | */ | |
179 | #ifdef NDEBUG | |
180 | #error building with NDEBUG is not supported | |
181 | #endif | |
182 | #ifdef G_DISABLE_ASSERT | |
183 | #error building with G_DISABLE_ASSERT is not supported | |
184 | #endif | |
185 | ||
bfe7e449 PM |
186 | #ifndef O_LARGEFILE |
187 | #define O_LARGEFILE 0 | |
188 | #endif | |
189 | #ifndef O_BINARY | |
190 | #define O_BINARY 0 | |
191 | #endif | |
192 | #ifndef MAP_ANONYMOUS | |
193 | #define MAP_ANONYMOUS MAP_ANON | |
194 | #endif | |
2667e069 AB |
195 | #ifndef MAP_FIXED_NOREPLACE |
196 | #define MAP_FIXED_NOREPLACE 0 | |
197 | #endif | |
d94e0bc9 DH |
198 | #ifndef MAP_NORESERVE |
199 | #define MAP_NORESERVE 0 | |
200 | #endif | |
bfe7e449 PM |
201 | #ifndef ENOMEDIUM |
202 | #define ENOMEDIUM ENODEV | |
203 | #endif | |
204 | #if !defined(ENOTSUP) | |
205 | #define ENOTSUP 4096 | |
206 | #endif | |
207 | #if !defined(ECANCELED) | |
208 | #define ECANCELED 4097 | |
209 | #endif | |
210 | #if !defined(EMEDIUMTYPE) | |
211 | #define EMEDIUMTYPE 4098 | |
212 | #endif | |
b6f5d3b5 EB |
213 | #if !defined(ESHUTDOWN) |
214 | #define ESHUTDOWN 4099 | |
215 | #endif | |
e7b47c22 PM |
216 | |
217 | /* time_t may be either 32 or 64 bits depending on the host OS, and | |
218 | * can be either signed or unsigned, so we can't just hardcode a | |
219 | * specific maximum value. This is not a C preprocessor constant, | |
220 | * so you can't use TIME_MAX in an #ifdef, but for our purposes | |
221 | * this isn't a problem. | |
222 | */ | |
223 | ||
224 | /* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from | |
225 | * Gnulib, and are under the LGPL v2.1 or (at your option) any | |
226 | * later version. | |
227 | */ | |
228 | ||
229 | /* True if the real type T is signed. */ | |
230 | #define TYPE_SIGNED(t) (!((t)0 < (t)-1)) | |
231 | ||
232 | /* The width in bits of the integer type or expression T. | |
233 | * Padding bits are not supported. | |
234 | */ | |
235 | #define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT) | |
236 | ||
237 | /* The maximum and minimum values for the integer type T. */ | |
238 | #define TYPE_MAXIMUM(t) \ | |
239 | ((t) (!TYPE_SIGNED(t) \ | |
240 | ? (t)-1 \ | |
241 | : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1))) | |
242 | ||
bfe7e449 | 243 | #ifndef TIME_MAX |
e7b47c22 | 244 | #define TIME_MAX TYPE_MAXIMUM(time_t) |
bfe7e449 PM |
245 | #endif |
246 | ||
a8139632 MA |
247 | /* HOST_LONG_BITS is the size of a native pointer in bits. */ |
248 | #if UINTPTR_MAX == UINT32_MAX | |
249 | # define HOST_LONG_BITS 32 | |
250 | #elif UINTPTR_MAX == UINT64_MAX | |
251 | # define HOST_LONG_BITS 64 | |
252 | #else | |
253 | # error Unknown pointer size | |
254 | #endif | |
255 | ||
6b39b063 EB |
256 | /* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with |
257 | * the wrong type. Our replacement isn't usable in preprocessor | |
258 | * expressions, but it is sufficient for our needs. */ | |
7db492a1 | 259 | #ifdef HAVE_BROKEN_SIZE_MAX |
6b39b063 EB |
260 | #undef SIZE_MAX |
261 | #define SIZE_MAX ((size_t)-1) | |
262 | #endif | |
263 | ||
f9919116 EB |
264 | /* |
265 | * Two variations of MIN/MAX macros. The first is for runtime use, and | |
266 | * evaluates arguments only once (so it is safe even with side | |
267 | * effects), but will not work in constant contexts (such as array | |
268 | * size declarations) because of the '{}'. The second is for constant | |
269 | * expression use, where evaluating arguments twice is safe because | |
270 | * the result is going to be constant anyway, but will not work in a | |
271 | * runtime context because of a void expression where a value is | |
272 | * expected. Thus, both gcc and clang will fail to compile if you use | |
273 | * the wrong macro (even if the error may seem a bit cryptic). | |
274 | * | |
275 | * Note that neither form is usable as an #if condition; if you truly | |
276 | * need to write conditional code that depends on a minimum or maximum | |
277 | * determined by the pre-processor instead of the compiler, you'll | |
6553aa1d EB |
278 | * have to open-code it. Sadly, Coverity is severely confused by the |
279 | * constant variants, so we have to dumb things down there. | |
f9919116 EB |
280 | */ |
281 | #undef MIN | |
282 | #define MIN(a, b) \ | |
283 | ({ \ | |
284 | typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ | |
285 | _a < _b ? _a : _b; \ | |
286 | }) | |
f9919116 EB |
287 | #undef MAX |
288 | #define MAX(a, b) \ | |
289 | ({ \ | |
290 | typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ | |
291 | _a > _b ? _a : _b; \ | |
292 | }) | |
6553aa1d EB |
293 | |
294 | #ifdef __COVERITY__ | |
295 | # define MIN_CONST(a, b) ((a) < (b) ? (a) : (b)) | |
296 | # define MAX_CONST(a, b) ((a) > (b) ? (a) : (b)) | |
297 | #else | |
298 | # define MIN_CONST(a, b) \ | |
299 | __builtin_choose_expr( \ | |
300 | __builtin_constant_p(a) && __builtin_constant_p(b), \ | |
301 | (a) < (b) ? (a) : (b), \ | |
302 | ((void)0)) | |
303 | # define MAX_CONST(a, b) \ | |
f9919116 EB |
304 | __builtin_choose_expr( \ |
305 | __builtin_constant_p(a) && __builtin_constant_p(b), \ | |
306 | (a) > (b) ? (a) : (b), \ | |
307 | ((void)0)) | |
6553aa1d | 308 | #endif |
df2542c7 | 309 | |
f9919116 EB |
310 | /* |
311 | * Minimum function that returns zero only if both values are zero. | |
312 | * Intended for use with unsigned values only. | |
313 | */ | |
ac3a8726 | 314 | #ifndef MIN_NON_ZERO |
f9919116 EB |
315 | #define MIN_NON_ZERO(a, b) \ |
316 | ({ \ | |
317 | typeof(1 ? (a) : (b)) _a = (a), _b = (b); \ | |
318 | _a == 0 ? _b : (_b == 0 || _b > _a) ? _a : _b; \ | |
319 | }) | |
ac3a8726 PL |
320 | #endif |
321 | ||
c9797456 PB |
322 | /* |
323 | * Round number down to multiple. Safe when m is not a power of 2 (see | |
324 | * ROUND_DOWN for a faster version when a power of 2 is guaranteed). | |
325 | */ | |
e07e540a MA |
326 | #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) |
327 | ||
c9797456 PB |
328 | /* |
329 | * Round number up to multiple. Safe when m is not a power of 2 (see | |
330 | * ROUND_UP for a faster version when a power of 2 is guaranteed). | |
331 | */ | |
e07e540a MA |
332 | #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) |
333 | ||
18a60a76 SF |
334 | /* Check if n is a multiple of m */ |
335 | #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) | |
336 | ||
6b587d3c SF |
337 | /* n-byte align pointer down */ |
338 | #define QEMU_ALIGN_PTR_DOWN(p, n) \ | |
339 | ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) | |
340 | ||
341 | /* n-byte align pointer up */ | |
342 | #define QEMU_ALIGN_PTR_UP(p, n) \ | |
343 | ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) | |
344 | ||
345 | /* Check if pointer p is n-bytes aligned */ | |
346 | #define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) | |
347 | ||
c9797456 PB |
348 | /* |
349 | * Round number down to multiple. Requires that d be a power of 2 (see | |
e9fd416e | 350 | * QEMU_ALIGN_UP for a safer but slower version on arbitrary |
c9797456 PB |
351 | * numbers); works even if d is a smaller type than n. |
352 | */ | |
353 | #ifndef ROUND_DOWN | |
354 | #define ROUND_DOWN(n, d) ((n) & -(0 ? (n) : (d))) | |
355 | #endif | |
356 | ||
357 | /* | |
358 | * Round number up to multiple. Requires that d be a power of 2 (see | |
359 | * QEMU_ALIGN_UP for a safer but slower version on arbitrary | |
360 | * numbers); works even if d is a smaller type than n. | |
361 | */ | |
292c8e50 | 362 | #ifndef ROUND_UP |
c9797456 | 363 | #define ROUND_UP(n, d) ROUND_DOWN((n) + (d) - 1, (d)) |
292c8e50 PB |
364 | #endif |
365 | ||
e0e53b2f | 366 | #ifndef DIV_ROUND_UP |
2098b073 | 367 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
e0e53b2f CC |
368 | #endif |
369 | ||
ed63ec0d MT |
370 | /* |
371 | * &(x)[0] is always a pointer - if it's same type as x then the argument is a | |
372 | * pointer, not an array. | |
373 | */ | |
374 | #define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \ | |
375 | typeof(&(x)[0]))) | |
0954d0d9 | 376 | #ifndef ARRAY_SIZE |
ed63ec0d MT |
377 | #define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \ |
378 | QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x))) | |
0954d0d9 BS |
379 | #endif |
380 | ||
f97742d0 | 381 | int qemu_daemon(int nochdir, int noclose); |
7d2a35cc | 382 | void *qemu_try_memalign(size_t alignment, size_t size); |
33f00271 | 383 | void *qemu_memalign(size_t alignment, size_t size); |
8dbe22c6 DH |
384 | void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared, |
385 | bool noreserve); | |
49b470eb | 386 | void qemu_vfree(void *ptr); |
e7a09b92 | 387 | void qemu_anon_ram_free(void *ptr, size_t size); |
ea88812f | 388 | |
4d324c0b VSO |
389 | /* |
390 | * It's an analog of GLIB's g_autoptr_cleanup_generic_gfree(), used to define | |
391 | * g_autofree macro. | |
392 | */ | |
393 | static inline void qemu_cleanup_generic_vfree(void *p) | |
394 | { | |
395 | void **pp = (void **)p; | |
396 | qemu_vfree(*pp); | |
397 | } | |
398 | ||
399 | /* | |
400 | * Analog of g_autofree, but qemu_vfree is called on cleanup instead of g_free. | |
401 | */ | |
402 | #define QEMU_AUTO_VFREE __attribute__((cleanup(qemu_cleanup_generic_vfree))) | |
403 | ||
b444f5c0 DH |
404 | /* |
405 | * Abstraction of PROT_ and MAP_ flags as passed to mmap(), for example, | |
406 | * consumed by qemu_ram_mmap(). | |
407 | */ | |
408 | ||
409 | /* Map PROT_READ instead of PROT_READ | PROT_WRITE. */ | |
410 | #define QEMU_MAP_READONLY (1 << 0) | |
411 | ||
412 | /* Use MAP_SHARED instead of MAP_PRIVATE. */ | |
413 | #define QEMU_MAP_SHARED (1 << 1) | |
414 | ||
415 | /* | |
416 | * Use MAP_SYNC | MAP_SHARED_VALIDATE if supported. Ignored without | |
417 | * QEMU_MAP_SHARED. If mapping fails, warn and fallback to !QEMU_MAP_SYNC. | |
418 | */ | |
419 | #define QEMU_MAP_SYNC (1 << 2) | |
420 | ||
8dbe22c6 DH |
421 | /* |
422 | * Use MAP_NORESERVE to skip reservation of swap space (or huge pages if | |
423 | * applicable). Bail out if not supported/effective. | |
424 | */ | |
425 | #define QEMU_MAP_NORESERVE (1 << 3) | |
426 | ||
b444f5c0 | 427 | |
e78815a5 AF |
428 | #define QEMU_MADV_INVALID -1 |
429 | ||
430 | #if defined(CONFIG_MADVISE) | |
431 | ||
432 | #define QEMU_MADV_WILLNEED MADV_WILLNEED | |
433 | #define QEMU_MADV_DONTNEED MADV_DONTNEED | |
434 | #ifdef MADV_DONTFORK | |
435 | #define QEMU_MADV_DONTFORK MADV_DONTFORK | |
436 | #else | |
437 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
438 | #endif | |
439 | #ifdef MADV_MERGEABLE | |
440 | #define QEMU_MADV_MERGEABLE MADV_MERGEABLE | |
441 | #else | |
442 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
443 | #endif | |
605d0a94 PB |
444 | #ifdef MADV_UNMERGEABLE |
445 | #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE | |
446 | #else | |
447 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID | |
448 | #endif | |
449 | #ifdef MADV_DODUMP | |
450 | #define QEMU_MADV_DODUMP MADV_DODUMP | |
451 | #else | |
452 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
453 | #endif | |
ddb97f1d JB |
454 | #ifdef MADV_DONTDUMP |
455 | #define QEMU_MADV_DONTDUMP MADV_DONTDUMP | |
456 | #else | |
457 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID | |
458 | #endif | |
ad0b5321 LC |
459 | #ifdef MADV_HUGEPAGE |
460 | #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE | |
461 | #else | |
462 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID | |
463 | #endif | |
ebf81150 DDAG |
464 | #ifdef MADV_NOHUGEPAGE |
465 | #define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE | |
466 | #else | |
467 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID | |
468 | #endif | |
0f81d335 EH |
469 | #ifdef MADV_REMOVE |
470 | #define QEMU_MADV_REMOVE MADV_REMOVE | |
471 | #else | |
cdfa56c5 | 472 | #define QEMU_MADV_REMOVE QEMU_MADV_DONTNEED |
0f81d335 | 473 | #endif |
a384bfa3 DH |
474 | #ifdef MADV_POPULATE_WRITE |
475 | #define QEMU_MADV_POPULATE_WRITE MADV_POPULATE_WRITE | |
476 | #else | |
477 | #define QEMU_MADV_POPULATE_WRITE QEMU_MADV_INVALID | |
478 | #endif | |
e78815a5 AF |
479 | |
480 | #elif defined(CONFIG_POSIX_MADVISE) | |
481 | ||
482 | #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED | |
483 | #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED | |
484 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
485 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
486 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
487 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 488 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 489 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 490 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
cdfa56c5 | 491 | #define QEMU_MADV_REMOVE QEMU_MADV_DONTNEED |
a384bfa3 | 492 | #define QEMU_MADV_POPULATE_WRITE QEMU_MADV_INVALID |
e78815a5 AF |
493 | |
494 | #else /* no-op */ | |
495 | ||
496 | #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID | |
497 | #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID | |
498 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
499 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
500 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
501 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 502 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 503 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 504 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
0f81d335 | 505 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID |
a384bfa3 | 506 | #define QEMU_MADV_POPULATE_WRITE QEMU_MADV_INVALID |
e78815a5 AF |
507 | |
508 | #endif | |
509 | ||
d203c643 MAL |
510 | #ifdef _WIN32 |
511 | #define HAVE_CHARDEV_SERIAL 1 | |
512 | #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ | |
513 | || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ | |
949da1eb | 514 | || defined(__GLIBC__) || defined(__APPLE__) |
d203c643 MAL |
515 | #define HAVE_CHARDEV_SERIAL 1 |
516 | #endif | |
517 | ||
518 | #if defined(__linux__) || defined(__FreeBSD__) || \ | |
519 | defined(__FreeBSD_kernel__) || defined(__DragonFly__) | |
520 | #define HAVE_CHARDEV_PARPORT 1 | |
521 | #endif | |
522 | ||
8bf0f175 DC |
523 | #if defined(__HAIKU__) |
524 | #define SIGIO SIGPOLL | |
525 | #endif | |
526 | ||
a16fc07e PB |
527 | #if defined(CONFIG_LINUX) |
528 | #ifndef BUS_MCEERR_AR | |
529 | #define BUS_MCEERR_AR 4 | |
530 | #endif | |
531 | #ifndef BUS_MCEERR_AO | |
532 | #define BUS_MCEERR_AO 5 | |
533 | #endif | |
534 | #endif | |
535 | ||
d2f39add | 536 | #if defined(__linux__) && \ |
0c1272cc NP |
537 | (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ |
538 | || defined(__powerpc64__)) | |
d2f39add DD |
539 | /* Use 2 MiB alignment so transparent hugepages can be used by KVM. |
540 | Valgrind does not support alignments larger than 1 MiB, | |
541 | therefore we need special code which handles running on Valgrind. */ | |
542 | # define QEMU_VMALLOC_ALIGN (512 * 4096) | |
543 | #elif defined(__linux__) && defined(__s390x__) | |
544 | /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */ | |
545 | # define QEMU_VMALLOC_ALIGN (256 * 4096) | |
57d1f6d7 | 546 | #elif defined(__linux__) && defined(__sparc__) |
038adc2f | 547 | # define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size, SHMLBA) |
d2f39add | 548 | #else |
038adc2f | 549 | # define QEMU_VMALLOC_ALIGN qemu_real_host_page_size |
d2f39add DD |
550 | #endif |
551 | ||
d98d4072 PB |
552 | #ifdef CONFIG_POSIX |
553 | struct qemu_signalfd_siginfo { | |
554 | uint32_t ssi_signo; /* Signal number */ | |
555 | int32_t ssi_errno; /* Error number (unused) */ | |
556 | int32_t ssi_code; /* Signal code */ | |
557 | uint32_t ssi_pid; /* PID of sender */ | |
558 | uint32_t ssi_uid; /* Real UID of sender */ | |
559 | int32_t ssi_fd; /* File descriptor (SIGIO) */ | |
560 | uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */ | |
561 | uint32_t ssi_band; /* Band event (SIGIO) */ | |
562 | uint32_t ssi_overrun; /* POSIX timer overrun count */ | |
563 | uint32_t ssi_trapno; /* Trap number that caused signal */ | |
564 | int32_t ssi_status; /* Exit status or signal (SIGCHLD) */ | |
565 | int32_t ssi_int; /* Integer sent by sigqueue(2) */ | |
566 | uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */ | |
567 | uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */ | |
568 | uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */ | |
569 | uint64_t ssi_addr; /* Address that generated signal | |
570 | (for hardware-generated signals) */ | |
571 | uint8_t pad[48]; /* Pad size to 128 bytes (allow for | |
572 | additional fields in the future) */ | |
573 | }; | |
574 | ||
575 | int qemu_signalfd(const sigset_t *mask); | |
576 | void sigaction_invoke(struct sigaction *action, | |
577 | struct qemu_signalfd_siginfo *info); | |
578 | #endif | |
579 | ||
e78815a5 | 580 | int qemu_madvise(void *addr, size_t len, int advice); |
d7107fc0 | 581 | int qemu_mprotect_rw(void *addr, size_t size); |
5fa64b31 EC |
582 | int qemu_mprotect_rwx(void *addr, size_t size); |
583 | int qemu_mprotect_none(void *addr, size_t size); | |
e78815a5 | 584 | |
c490af57 DB |
585 | /* |
586 | * Don't introduce new usage of this function, prefer the following | |
587 | * qemu_open/qemu_create that take an "Error **errp" | |
588 | */ | |
448058aa | 589 | int qemu_open_old(const char *name, int flags, ...); |
c490af57 DB |
590 | int qemu_open(const char *name, int flags, Error **errp); |
591 | int qemu_create(const char *name, int flags, mode_t mode, Error **errp); | |
17e0b6ab | 592 | int qemu_close(int fd); |
ee13240e | 593 | int qemu_unlink(const char *name); |
761d1ddf | 594 | #ifndef _WIN32 |
60efffa4 | 595 | int qemu_dup_flags(int fd, int flags); |
761d1ddf | 596 | int qemu_dup(int fd); |
13461fdb FZ |
597 | int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); |
598 | int qemu_unlock_fd(int fd, int64_t start, int64_t len); | |
599 | int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); | |
ca749954 | 600 | bool qemu_has_ofd_lock(void); |
6333da0f | 601 | #endif |
17e0b6ab | 602 | |
953ffe0f AF |
603 | #if defined(__HAIKU__) && defined(__i386__) |
604 | #define FMT_pid "%ld" | |
0e0167ba SW |
605 | #elif defined(WIN64) |
606 | #define FMT_pid "%" PRId64 | |
953ffe0f AF |
607 | #else |
608 | #define FMT_pid "%d" | |
609 | #endif | |
610 | ||
9e6bdef2 MAL |
611 | bool qemu_write_pidfile(const char *pidfile, Error **errp); |
612 | ||
dc7a09cf | 613 | int qemu_get_thread_id(void); |
aa26bb2d | 614 | |
9adea5f7 PB |
615 | #ifndef CONFIG_IOVEC |
616 | struct iovec { | |
617 | void *iov_base; | |
618 | size_t iov_len; | |
619 | }; | |
620 | /* | |
621 | * Use the same value as Linux for now. | |
622 | */ | |
623 | #define IOV_MAX 1024 | |
624 | ||
625 | ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); | |
626 | ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); | |
9adea5f7 PB |
627 | #endif |
628 | ||
ad620c29 BS |
629 | #ifdef _WIN32 |
630 | static inline void qemu_timersub(const struct timeval *val1, | |
631 | const struct timeval *val2, | |
632 | struct timeval *res) | |
633 | { | |
634 | res->tv_sec = val1->tv_sec - val2->tv_sec; | |
635 | if (val1->tv_usec < val2->tv_usec) { | |
636 | res->tv_sec--; | |
637 | res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000; | |
638 | } else { | |
639 | res->tv_usec = val1->tv_usec - val2->tv_usec; | |
640 | } | |
641 | } | |
642 | #else | |
643 | #define qemu_timersub timersub | |
644 | #endif | |
645 | ||
49ee3590 AL |
646 | void qemu_set_cloexec(int fd); |
647 | ||
d494352c EH |
648 | /* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default |
649 | * instead of QEMU_VERSION, so setting hw_version on MachineClass | |
650 | * is no longer mandatory. | |
651 | * | |
652 | * Do NOT change this string, or it will break compatibility on all | |
653 | * machine classes that don't set hw_version. | |
654 | */ | |
655 | #define QEMU_HW_VERSION "2.5+" | |
656 | ||
fac862ff | 657 | /* QEMU "hardware version" setting. Used to replace code that exposed |
cb8d4c8f | 658 | * QEMU_VERSION to guests in the past and need to keep compatibility. |
fac862ff EH |
659 | * Do not use qemu_hw_version() in new code. |
660 | */ | |
35c2c8dc EH |
661 | void qemu_set_hw_version(const char *); |
662 | const char *qemu_hw_version(void); | |
93bfef4c | 663 | |
0f66998f PM |
664 | void fips_set_state(bool requested); |
665 | bool fips_get_state(void); | |
666 | ||
e2ea3515 LE |
667 | /* Return a dynamically allocated pathname denoting a file or directory that is |
668 | * appropriate for storing local state. | |
669 | * | |
670 | * @relative_pathname need not start with a directory separator; one will be | |
671 | * added automatically. | |
672 | * | |
673 | * The caller is responsible for releasing the value returned with g_free() | |
674 | * after use. | |
675 | */ | |
676 | char *qemu_get_local_state_pathname(const char *relative_pathname); | |
677 | ||
10f5bff6 FZ |
678 | /* Find program directory, and save it for later usage with |
679 | * qemu_get_exec_dir(). | |
680 | * Try OS specific API first, if not working, parse from argv0. */ | |
681 | void qemu_init_exec_dir(const char *argv0); | |
682 | ||
a4c13869 PB |
683 | /* Get the saved exec dir. */ |
684 | const char *qemu_get_exec_dir(void); | |
10f5bff6 | 685 | |
b6a3e690 RH |
686 | /** |
687 | * qemu_getauxval: | |
688 | * @type: the auxiliary vector key to lookup | |
689 | * | |
690 | * Search the auxiliary vector for @type, returning the value | |
691 | * or 0 if @type is not present. | |
692 | */ | |
b6a3e690 | 693 | unsigned long qemu_getauxval(unsigned long type); |
b6a3e690 | 694 | |
13401ba0 SH |
695 | void qemu_set_tty_echo(int fd, bool echo); |
696 | ||
1e356fc1 JK |
697 | void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus, |
698 | Error **errp); | |
38183310 | 699 | |
7dc9ae43 MP |
700 | /** |
701 | * qemu_get_pid_name: | |
702 | * @pid: pid of a process | |
703 | * | |
704 | * For given @pid fetch its name. Caller is responsible for | |
705 | * freeing the string when no longer needed. | |
706 | * Returns allocated string on success, NULL on failure. | |
707 | */ | |
708 | char *qemu_get_pid_name(pid_t pid); | |
709 | ||
57cb38b3 DB |
710 | /** |
711 | * qemu_fork: | |
712 | * | |
713 | * A version of fork that avoids signal handler race | |
714 | * conditions that can lead to child process getting | |
715 | * signals that are otherwise only expected by the | |
716 | * parent. It also resets all signal handlers to the | |
717 | * default settings. | |
718 | * | |
719 | * Returns 0 to child process, pid number to parent | |
720 | * or -1 on failure. | |
721 | */ | |
722 | pid_t qemu_fork(Error **errp); | |
723 | ||
3637cf58 EC |
724 | /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even |
725 | * when intptr_t is 32-bit and we are aligning a long long. | |
726 | */ | |
727 | extern uintptr_t qemu_real_host_page_size; | |
728 | extern intptr_t qemu_real_host_page_mask; | |
729 | ||
b255b2c8 | 730 | extern int qemu_icache_linesize; |
5fe21034 | 731 | extern int qemu_icache_linesize_log; |
b255b2c8 | 732 | extern int qemu_dcache_linesize; |
5fe21034 | 733 | extern int qemu_dcache_linesize_log; |
b255b2c8 | 734 | |
d339d766 RJ |
735 | /* |
736 | * After using getopt or getopt_long, if you need to parse another set | |
737 | * of options, then you must reset optind. Unfortunately the way to | |
738 | * do this varies between implementations of getopt. | |
739 | */ | |
740 | static inline void qemu_reset_optind(void) | |
741 | { | |
742 | #ifdef HAVE_OPTRESET | |
743 | optind = 1; | |
744 | optreset = 1; | |
745 | #else | |
746 | optind = 0; | |
747 | #endif | |
748 | } | |
749 | ||
e47f4765 MP |
750 | /** |
751 | * qemu_get_host_name: | |
752 | * @errp: Error object | |
753 | * | |
754 | * Operating system agnostic way of querying host name. | |
755 | * | |
756 | * Returns allocated hostname (caller should free), NULL on failure. | |
757 | */ | |
758 | char *qemu_get_host_name(Error **errp); | |
759 | ||
ad06ef0e AB |
760 | /** |
761 | * qemu_get_host_physmem: | |
762 | * | |
763 | * Operating system agnostic way of querying host memory. | |
764 | * | |
765 | * Returns amount of physical memory on the system. This is purely | |
766 | * advisery and may return 0 if we can't work it out. At the other | |
767 | * end we saturate to SIZE_MAX if you are lucky enough to have that | |
768 | * much memory. | |
769 | */ | |
770 | size_t qemu_get_host_physmem(void); | |
771 | ||
653b87eb RB |
772 | /* |
773 | * Toggle write/execute on the pages marked MAP_JIT | |
774 | * for the current thread. | |
775 | */ | |
776 | #if defined(MAC_OS_VERSION_11_0) && \ | |
777 | MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0 | |
778 | static inline void qemu_thread_jit_execute(void) | |
779 | { | |
780 | if (__builtin_available(macOS 11.0, *)) { | |
781 | pthread_jit_write_protect_np(true); | |
782 | } | |
783 | } | |
784 | ||
785 | static inline void qemu_thread_jit_write(void) | |
786 | { | |
787 | if (__builtin_available(macOS 11.0, *)) { | |
788 | pthread_jit_write_protect_np(false); | |
789 | } | |
790 | } | |
791 | #else | |
792 | static inline void qemu_thread_jit_write(void) {} | |
793 | static inline void qemu_thread_jit_execute(void) {} | |
794 | #endif | |
795 | ||
1ad27f7d JD |
796 | /** |
797 | * Platforms which do not support system() return ENOSYS | |
798 | */ | |
799 | #ifndef HAVE_SYSTEM_FUNCTION | |
800 | #define system platform_does_not_support_system | |
801 | static inline int platform_does_not_support_system(const char *command) | |
802 | { | |
803 | errno = ENOSYS; | |
804 | return -1; | |
805 | } | |
806 | #endif /* !HAVE_SYSTEM_FUNCTION */ | |
807 | ||
875df03b PB |
808 | #ifdef __cplusplus |
809 | } | |
810 | #endif | |
811 | ||
ea88812f | 812 | #endif |