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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 PM |
31 | #ifdef NEED_CPU_H |
32 | #include "config-target.h" | |
bdd90227 PB |
33 | #else |
34 | #include "exec/poison.h" | |
b1e34d1c | 35 | #endif |
a1a98357 PB |
36 | #ifdef __COVERITY__ |
37 | /* Coverity does not like the new _Float* types that are used by | |
38 | * recent glibc, and croaks on every single file that includes | |
39 | * stdlib.h. These typedefs are enough to please it. | |
40 | * | |
41 | * Note that these fix parse errors so they cannot be placed in | |
42 | * scripts/coverity-model.c. | |
43 | */ | |
44 | typedef float _Float32; | |
45 | typedef double _Float32x; | |
46 | typedef double _Float64; | |
47 | typedef __float80 _Float64x; | |
48 | typedef __float128 _Float128; | |
49 | #endif | |
50 | ||
49120868 | 51 | #include "qemu/compiler.h" |
d5db2ec1 | 52 | |
79f56d82 PM |
53 | /* Older versions of C++ don't get definitions of various macros from |
54 | * stdlib.h unless we define these macros before first inclusion of | |
55 | * that system header. | |
56 | */ | |
57 | #ifndef __STDC_CONSTANT_MACROS | |
58 | #define __STDC_CONSTANT_MACROS | |
59 | #endif | |
60 | #ifndef __STDC_LIMIT_MACROS | |
61 | #define __STDC_LIMIT_MACROS | |
62 | #endif | |
63 | #ifndef __STDC_FORMAT_MACROS | |
64 | #define __STDC_FORMAT_MACROS | |
65 | #endif | |
66 | ||
d5db2ec1 PM |
67 | /* The following block of code temporarily renames the daemon() function so the |
68 | * compiler does not see the warning associated with it in stdlib.h on OSX | |
69 | */ | |
70 | #ifdef __APPLE__ | |
71 | #define daemon qemu_fake_daemon_function | |
72 | #include <stdlib.h> | |
73 | #undef daemon | |
74 | extern int daemon(int, int); | |
75 | #endif | |
76 | ||
ea88812f | 77 | #include <stdarg.h> |
de5071c5 | 78 | #include <stddef.h> |
0f66998f | 79 | #include <stdbool.h> |
a2b257d6 | 80 | #include <stdint.h> |
128ab2ff | 81 | #include <sys/types.h> |
bfe7e449 PM |
82 | #include <stdlib.h> |
83 | #include <stdio.h> | |
84 | #include <string.h> | |
85 | #include <strings.h> | |
86 | #include <inttypes.h> | |
87 | #include <limits.h> | |
4d9310f4 DB |
88 | /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r |
89 | * function availability on recentish Mingw-w64 platforms. */ | |
90 | #include <unistd.h> | |
bfe7e449 PM |
91 | #include <time.h> |
92 | #include <ctype.h> | |
93 | #include <errno.h> | |
bfe7e449 PM |
94 | #include <fcntl.h> |
95 | #include <sys/stat.h> | |
96 | #include <sys/time.h> | |
97 | #include <assert.h> | |
e89fdafb SW |
98 | /* setjmp must be declared before sysemu/os-win32.h |
99 | * because it is redefined there. */ | |
100 | #include <setjmp.h> | |
bfe7e449 PM |
101 | #include <signal.h> |
102 | ||
98b2d199 | 103 | #ifdef __OpenBSD__ |
128ab2ff BS |
104 | #include <sys/signal.h> |
105 | #endif | |
ea88812f | 106 | |
13c7b2da PB |
107 | #ifndef _WIN32 |
108 | #include <sys/wait.h> | |
109 | #else | |
110 | #define WIFEXITED(x) 1 | |
111 | #define WEXITSTATUS(x) (x) | |
112 | #endif | |
113 | ||
bfe7e449 PM |
114 | #ifdef _WIN32 |
115 | #include "sysemu/os-win32.h" | |
116 | #endif | |
117 | ||
118 | #ifdef CONFIG_POSIX | |
119 | #include "sysemu/os-posix.h" | |
120 | #endif | |
f7b4a940 | 121 | |
529490e5 | 122 | #include "glib-compat.h" |
da34e65c | 123 | #include "qemu/typedefs.h" |
57cb38b3 | 124 | |
28012e19 MT |
125 | /* |
126 | * According to waitpid man page: | |
127 | * WCOREDUMP | |
128 | * This macro is not specified in POSIX.1-2001 and is not | |
129 | * available on some UNIX implementations (e.g., AIX, SunOS). | |
130 | * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif. | |
131 | */ | |
132 | #ifndef WCOREDUMP | |
133 | #define WCOREDUMP(status) 0 | |
134 | #endif | |
262a69f4 EB |
135 | /* |
136 | * We have a lot of unaudited code that may fail in strange ways, or | |
137 | * even be a security risk during migration, if you disable assertions | |
138 | * at compile-time. You may comment out these safety checks if you | |
139 | * absolutely want to disable assertion overhead, but it is not | |
140 | * supported upstream so the risk is all yours. Meanwhile, please | |
141 | * submit patches to remove any side-effects inside an assertion, or | |
142 | * fixing error handling that should use Error instead of assert. | |
143 | */ | |
144 | #ifdef NDEBUG | |
145 | #error building with NDEBUG is not supported | |
146 | #endif | |
147 | #ifdef G_DISABLE_ASSERT | |
148 | #error building with G_DISABLE_ASSERT is not supported | |
149 | #endif | |
150 | ||
bfe7e449 PM |
151 | #ifndef O_LARGEFILE |
152 | #define O_LARGEFILE 0 | |
153 | #endif | |
154 | #ifndef O_BINARY | |
155 | #define O_BINARY 0 | |
156 | #endif | |
157 | #ifndef MAP_ANONYMOUS | |
158 | #define MAP_ANONYMOUS MAP_ANON | |
159 | #endif | |
160 | #ifndef ENOMEDIUM | |
161 | #define ENOMEDIUM ENODEV | |
162 | #endif | |
163 | #if !defined(ENOTSUP) | |
164 | #define ENOTSUP 4096 | |
165 | #endif | |
166 | #if !defined(ECANCELED) | |
167 | #define ECANCELED 4097 | |
168 | #endif | |
169 | #if !defined(EMEDIUMTYPE) | |
170 | #define EMEDIUMTYPE 4098 | |
171 | #endif | |
b6f5d3b5 EB |
172 | #if !defined(ESHUTDOWN) |
173 | #define ESHUTDOWN 4099 | |
174 | #endif | |
e7b47c22 PM |
175 | |
176 | /* time_t may be either 32 or 64 bits depending on the host OS, and | |
177 | * can be either signed or unsigned, so we can't just hardcode a | |
178 | * specific maximum value. This is not a C preprocessor constant, | |
179 | * so you can't use TIME_MAX in an #ifdef, but for our purposes | |
180 | * this isn't a problem. | |
181 | */ | |
182 | ||
183 | /* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from | |
184 | * Gnulib, and are under the LGPL v2.1 or (at your option) any | |
185 | * later version. | |
186 | */ | |
187 | ||
188 | /* True if the real type T is signed. */ | |
189 | #define TYPE_SIGNED(t) (!((t)0 < (t)-1)) | |
190 | ||
191 | /* The width in bits of the integer type or expression T. | |
192 | * Padding bits are not supported. | |
193 | */ | |
194 | #define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT) | |
195 | ||
196 | /* The maximum and minimum values for the integer type T. */ | |
197 | #define TYPE_MAXIMUM(t) \ | |
198 | ((t) (!TYPE_SIGNED(t) \ | |
199 | ? (t)-1 \ | |
200 | : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1))) | |
201 | ||
bfe7e449 | 202 | #ifndef TIME_MAX |
e7b47c22 | 203 | #define TIME_MAX TYPE_MAXIMUM(time_t) |
bfe7e449 PM |
204 | #endif |
205 | ||
a8139632 MA |
206 | /* HOST_LONG_BITS is the size of a native pointer in bits. */ |
207 | #if UINTPTR_MAX == UINT32_MAX | |
208 | # define HOST_LONG_BITS 32 | |
209 | #elif UINTPTR_MAX == UINT64_MAX | |
210 | # define HOST_LONG_BITS 64 | |
211 | #else | |
212 | # error Unknown pointer size | |
213 | #endif | |
214 | ||
6b39b063 EB |
215 | /* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with |
216 | * the wrong type. Our replacement isn't usable in preprocessor | |
217 | * expressions, but it is sufficient for our needs. */ | |
218 | #if defined(HAVE_BROKEN_SIZE_MAX) && HAVE_BROKEN_SIZE_MAX | |
219 | #undef SIZE_MAX | |
220 | #define SIZE_MAX ((size_t)-1) | |
221 | #endif | |
222 | ||
df2542c7 JM |
223 | #ifndef MIN |
224 | #define MIN(a, b) (((a) < (b)) ? (a) : (b)) | |
225 | #endif | |
226 | #ifndef MAX | |
227 | #define MAX(a, b) (((a) > (b)) ? (a) : (b)) | |
228 | #endif | |
229 | ||
ac3a8726 PL |
230 | /* Minimum function that returns zero only iff both values are zero. |
231 | * Intended for use with unsigned values only. */ | |
232 | #ifndef MIN_NON_ZERO | |
d27ba624 FZ |
233 | #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ |
234 | ((b) == 0 ? (a) : (MIN(a, b)))) | |
ac3a8726 PL |
235 | #endif |
236 | ||
e07e540a MA |
237 | /* Round number down to multiple */ |
238 | #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) | |
239 | ||
e9fd416e EB |
240 | /* Round number up to multiple. Safe when m is not a power of 2 (see |
241 | * ROUND_UP for a faster version when a power of 2 is guaranteed) */ | |
e07e540a MA |
242 | #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) |
243 | ||
18a60a76 SF |
244 | /* Check if n is a multiple of m */ |
245 | #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) | |
246 | ||
6b587d3c SF |
247 | /* n-byte align pointer down */ |
248 | #define QEMU_ALIGN_PTR_DOWN(p, n) \ | |
249 | ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) | |
250 | ||
251 | /* n-byte align pointer up */ | |
252 | #define QEMU_ALIGN_PTR_UP(p, n) \ | |
253 | ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) | |
254 | ||
255 | /* Check if pointer p is n-bytes aligned */ | |
256 | #define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) | |
257 | ||
e9fd416e EB |
258 | /* Round number up to multiple. Requires that d be a power of 2 (see |
259 | * QEMU_ALIGN_UP for a safer but slower version on arbitrary | |
2098b073 | 260 | * numbers); works even if d is a smaller type than n. */ |
292c8e50 | 261 | #ifndef ROUND_UP |
2098b073 | 262 | #define ROUND_UP(n, d) (((n) + (d) - 1) & -(0 ? (n) : (d))) |
292c8e50 PB |
263 | #endif |
264 | ||
e0e53b2f | 265 | #ifndef DIV_ROUND_UP |
2098b073 | 266 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
e0e53b2f CC |
267 | #endif |
268 | ||
ed63ec0d MT |
269 | /* |
270 | * &(x)[0] is always a pointer - if it's same type as x then the argument is a | |
271 | * pointer, not an array. | |
272 | */ | |
273 | #define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \ | |
274 | typeof(&(x)[0]))) | |
0954d0d9 | 275 | #ifndef ARRAY_SIZE |
ed63ec0d MT |
276 | #define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \ |
277 | QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x))) | |
0954d0d9 BS |
278 | #endif |
279 | ||
f97742d0 | 280 | int qemu_daemon(int nochdir, int noclose); |
7d2a35cc | 281 | void *qemu_try_memalign(size_t alignment, size_t size); |
33f00271 | 282 | void *qemu_memalign(size_t alignment, size_t size); |
06329cce | 283 | void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared); |
49b470eb | 284 | void qemu_vfree(void *ptr); |
e7a09b92 | 285 | void qemu_anon_ram_free(void *ptr, size_t size); |
ea88812f | 286 | |
e78815a5 AF |
287 | #define QEMU_MADV_INVALID -1 |
288 | ||
289 | #if defined(CONFIG_MADVISE) | |
290 | ||
291 | #define QEMU_MADV_WILLNEED MADV_WILLNEED | |
292 | #define QEMU_MADV_DONTNEED MADV_DONTNEED | |
293 | #ifdef MADV_DONTFORK | |
294 | #define QEMU_MADV_DONTFORK MADV_DONTFORK | |
295 | #else | |
296 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
297 | #endif | |
298 | #ifdef MADV_MERGEABLE | |
299 | #define QEMU_MADV_MERGEABLE MADV_MERGEABLE | |
300 | #else | |
301 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
302 | #endif | |
605d0a94 PB |
303 | #ifdef MADV_UNMERGEABLE |
304 | #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE | |
305 | #else | |
306 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID | |
307 | #endif | |
308 | #ifdef MADV_DODUMP | |
309 | #define QEMU_MADV_DODUMP MADV_DODUMP | |
310 | #else | |
311 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
312 | #endif | |
ddb97f1d JB |
313 | #ifdef MADV_DONTDUMP |
314 | #define QEMU_MADV_DONTDUMP MADV_DONTDUMP | |
315 | #else | |
316 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID | |
317 | #endif | |
ad0b5321 LC |
318 | #ifdef MADV_HUGEPAGE |
319 | #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE | |
320 | #else | |
321 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID | |
322 | #endif | |
ebf81150 DDAG |
323 | #ifdef MADV_NOHUGEPAGE |
324 | #define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE | |
325 | #else | |
326 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID | |
327 | #endif | |
0f81d335 EH |
328 | #ifdef MADV_REMOVE |
329 | #define QEMU_MADV_REMOVE MADV_REMOVE | |
330 | #else | |
331 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID | |
332 | #endif | |
e78815a5 AF |
333 | |
334 | #elif defined(CONFIG_POSIX_MADVISE) | |
335 | ||
336 | #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED | |
337 | #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED | |
338 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
339 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
340 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
341 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 342 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 343 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 344 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
0f81d335 | 345 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID |
e78815a5 AF |
346 | |
347 | #else /* no-op */ | |
348 | ||
349 | #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID | |
350 | #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID | |
351 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
352 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
353 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
354 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 355 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 356 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 357 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
0f81d335 | 358 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID |
e78815a5 AF |
359 | |
360 | #endif | |
361 | ||
d203c643 MAL |
362 | #ifdef _WIN32 |
363 | #define HAVE_CHARDEV_SERIAL 1 | |
364 | #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ | |
365 | || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ | |
366 | || defined(__GLIBC__) | |
367 | #define HAVE_CHARDEV_SERIAL 1 | |
368 | #endif | |
369 | ||
370 | #if defined(__linux__) || defined(__FreeBSD__) || \ | |
371 | defined(__FreeBSD_kernel__) || defined(__DragonFly__) | |
372 | #define HAVE_CHARDEV_PARPORT 1 | |
373 | #endif | |
374 | ||
a16fc07e PB |
375 | #if defined(CONFIG_LINUX) |
376 | #ifndef BUS_MCEERR_AR | |
377 | #define BUS_MCEERR_AR 4 | |
378 | #endif | |
379 | #ifndef BUS_MCEERR_AO | |
380 | #define BUS_MCEERR_AO 5 | |
381 | #endif | |
382 | #endif | |
383 | ||
d2f39add | 384 | #if defined(__linux__) && \ |
0c1272cc NP |
385 | (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ |
386 | || defined(__powerpc64__)) | |
d2f39add DD |
387 | /* Use 2 MiB alignment so transparent hugepages can be used by KVM. |
388 | Valgrind does not support alignments larger than 1 MiB, | |
389 | therefore we need special code which handles running on Valgrind. */ | |
390 | # define QEMU_VMALLOC_ALIGN (512 * 4096) | |
391 | #elif defined(__linux__) && defined(__s390x__) | |
392 | /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */ | |
393 | # define QEMU_VMALLOC_ALIGN (256 * 4096) | |
57d1f6d7 PM |
394 | #elif defined(__linux__) && defined(__sparc__) |
395 | #include <sys/shm.h> | |
396 | # define QEMU_VMALLOC_ALIGN MAX(getpagesize(), SHMLBA) | |
d2f39add DD |
397 | #else |
398 | # define QEMU_VMALLOC_ALIGN getpagesize() | |
399 | #endif | |
400 | ||
d98d4072 PB |
401 | #ifdef CONFIG_POSIX |
402 | struct qemu_signalfd_siginfo { | |
403 | uint32_t ssi_signo; /* Signal number */ | |
404 | int32_t ssi_errno; /* Error number (unused) */ | |
405 | int32_t ssi_code; /* Signal code */ | |
406 | uint32_t ssi_pid; /* PID of sender */ | |
407 | uint32_t ssi_uid; /* Real UID of sender */ | |
408 | int32_t ssi_fd; /* File descriptor (SIGIO) */ | |
409 | uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */ | |
410 | uint32_t ssi_band; /* Band event (SIGIO) */ | |
411 | uint32_t ssi_overrun; /* POSIX timer overrun count */ | |
412 | uint32_t ssi_trapno; /* Trap number that caused signal */ | |
413 | int32_t ssi_status; /* Exit status or signal (SIGCHLD) */ | |
414 | int32_t ssi_int; /* Integer sent by sigqueue(2) */ | |
415 | uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */ | |
416 | uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */ | |
417 | uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */ | |
418 | uint64_t ssi_addr; /* Address that generated signal | |
419 | (for hardware-generated signals) */ | |
420 | uint8_t pad[48]; /* Pad size to 128 bytes (allow for | |
421 | additional fields in the future) */ | |
422 | }; | |
423 | ||
424 | int qemu_signalfd(const sigset_t *mask); | |
425 | void sigaction_invoke(struct sigaction *action, | |
426 | struct qemu_signalfd_siginfo *info); | |
427 | #endif | |
428 | ||
e78815a5 | 429 | int qemu_madvise(void *addr, size_t len, int advice); |
5fa64b31 EC |
430 | int qemu_mprotect_rwx(void *addr, size_t size); |
431 | int qemu_mprotect_none(void *addr, size_t size); | |
e78815a5 | 432 | |
17e0b6ab AF |
433 | int qemu_open(const char *name, int flags, ...); |
434 | int qemu_close(int fd); | |
761d1ddf FZ |
435 | #ifndef _WIN32 |
436 | int qemu_dup(int fd); | |
437 | #endif | |
13461fdb FZ |
438 | int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); |
439 | int qemu_unlock_fd(int fd, int64_t start, int64_t len); | |
440 | int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); | |
ca749954 | 441 | bool qemu_has_ofd_lock(void); |
17e0b6ab | 442 | |
953ffe0f AF |
443 | #if defined(__HAIKU__) && defined(__i386__) |
444 | #define FMT_pid "%ld" | |
0e0167ba SW |
445 | #elif defined(WIN64) |
446 | #define FMT_pid "%" PRId64 | |
953ffe0f AF |
447 | #else |
448 | #define FMT_pid "%d" | |
449 | #endif | |
450 | ||
aa26bb2d | 451 | int qemu_create_pidfile(const char *filename); |
dc7a09cf | 452 | int qemu_get_thread_id(void); |
aa26bb2d | 453 | |
9adea5f7 PB |
454 | #ifndef CONFIG_IOVEC |
455 | struct iovec { | |
456 | void *iov_base; | |
457 | size_t iov_len; | |
458 | }; | |
459 | /* | |
460 | * Use the same value as Linux for now. | |
461 | */ | |
462 | #define IOV_MAX 1024 | |
463 | ||
464 | ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); | |
465 | ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); | |
466 | #else | |
467 | #include <sys/uio.h> | |
468 | #endif | |
469 | ||
ad620c29 BS |
470 | #ifdef _WIN32 |
471 | static inline void qemu_timersub(const struct timeval *val1, | |
472 | const struct timeval *val2, | |
473 | struct timeval *res) | |
474 | { | |
475 | res->tv_sec = val1->tv_sec - val2->tv_sec; | |
476 | if (val1->tv_usec < val2->tv_usec) { | |
477 | res->tv_sec--; | |
478 | res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000; | |
479 | } else { | |
480 | res->tv_usec = val1->tv_usec - val2->tv_usec; | |
481 | } | |
482 | } | |
483 | #else | |
484 | #define qemu_timersub timersub | |
485 | #endif | |
486 | ||
49ee3590 AL |
487 | void qemu_set_cloexec(int fd); |
488 | ||
d494352c EH |
489 | /* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default |
490 | * instead of QEMU_VERSION, so setting hw_version on MachineClass | |
491 | * is no longer mandatory. | |
492 | * | |
493 | * Do NOT change this string, or it will break compatibility on all | |
494 | * machine classes that don't set hw_version. | |
495 | */ | |
496 | #define QEMU_HW_VERSION "2.5+" | |
497 | ||
fac862ff | 498 | /* QEMU "hardware version" setting. Used to replace code that exposed |
cb8d4c8f | 499 | * QEMU_VERSION to guests in the past and need to keep compatibility. |
fac862ff EH |
500 | * Do not use qemu_hw_version() in new code. |
501 | */ | |
35c2c8dc EH |
502 | void qemu_set_hw_version(const char *); |
503 | const char *qemu_hw_version(void); | |
93bfef4c | 504 | |
0f66998f PM |
505 | void fips_set_state(bool requested); |
506 | bool fips_get_state(void); | |
507 | ||
e2ea3515 LE |
508 | /* Return a dynamically allocated pathname denoting a file or directory that is |
509 | * appropriate for storing local state. | |
510 | * | |
511 | * @relative_pathname need not start with a directory separator; one will be | |
512 | * added automatically. | |
513 | * | |
514 | * The caller is responsible for releasing the value returned with g_free() | |
515 | * after use. | |
516 | */ | |
517 | char *qemu_get_local_state_pathname(const char *relative_pathname); | |
518 | ||
10f5bff6 FZ |
519 | /* Find program directory, and save it for later usage with |
520 | * qemu_get_exec_dir(). | |
521 | * Try OS specific API first, if not working, parse from argv0. */ | |
522 | void qemu_init_exec_dir(const char *argv0); | |
523 | ||
524 | /* Get the saved exec dir. | |
525 | * Caller needs to release the returned string by g_free() */ | |
526 | char *qemu_get_exec_dir(void); | |
527 | ||
b6a3e690 RH |
528 | /** |
529 | * qemu_getauxval: | |
530 | * @type: the auxiliary vector key to lookup | |
531 | * | |
532 | * Search the auxiliary vector for @type, returning the value | |
533 | * or 0 if @type is not present. | |
534 | */ | |
b6a3e690 | 535 | unsigned long qemu_getauxval(unsigned long type); |
b6a3e690 | 536 | |
13401ba0 SH |
537 | void qemu_set_tty_echo(int fd, bool echo); |
538 | ||
1e356fc1 JK |
539 | void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus, |
540 | Error **errp); | |
38183310 | 541 | |
7dc9ae43 MP |
542 | /** |
543 | * qemu_get_pid_name: | |
544 | * @pid: pid of a process | |
545 | * | |
546 | * For given @pid fetch its name. Caller is responsible for | |
547 | * freeing the string when no longer needed. | |
548 | * Returns allocated string on success, NULL on failure. | |
549 | */ | |
550 | char *qemu_get_pid_name(pid_t pid); | |
551 | ||
57cb38b3 DB |
552 | /** |
553 | * qemu_fork: | |
554 | * | |
555 | * A version of fork that avoids signal handler race | |
556 | * conditions that can lead to child process getting | |
557 | * signals that are otherwise only expected by the | |
558 | * parent. It also resets all signal handlers to the | |
559 | * default settings. | |
560 | * | |
561 | * Returns 0 to child process, pid number to parent | |
562 | * or -1 on failure. | |
563 | */ | |
564 | pid_t qemu_fork(Error **errp); | |
565 | ||
3637cf58 EC |
566 | /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even |
567 | * when intptr_t is 32-bit and we are aligning a long long. | |
568 | */ | |
569 | extern uintptr_t qemu_real_host_page_size; | |
570 | extern intptr_t qemu_real_host_page_mask; | |
571 | ||
b255b2c8 EC |
572 | extern int qemu_icache_linesize; |
573 | extern int qemu_dcache_linesize; | |
574 | ||
ea88812f | 575 | #endif |