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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 | 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 | |
60 | extern int daemon(int, int); | |
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 | ||
98b2d199 | 107 | #ifdef __OpenBSD__ |
128ab2ff BS |
108 | #include <sys/signal.h> |
109 | #endif | |
ea88812f | 110 | |
13c7b2da PB |
111 | #ifndef _WIN32 |
112 | #include <sys/wait.h> | |
113 | #else | |
114 | #define WIFEXITED(x) 1 | |
115 | #define WEXITSTATUS(x) (x) | |
116 | #endif | |
117 | ||
bfe7e449 PM |
118 | #ifdef _WIN32 |
119 | #include "sysemu/os-win32.h" | |
120 | #endif | |
121 | ||
122 | #ifdef CONFIG_POSIX | |
123 | #include "sysemu/os-posix.h" | |
124 | #endif | |
f7b4a940 | 125 | |
529490e5 | 126 | #include "glib-compat.h" |
da34e65c | 127 | #include "qemu/typedefs.h" |
57cb38b3 | 128 | |
3ebee3b1 RH |
129 | /* |
130 | * For mingw, as of v6.0.0, the function implementing the assert macro is | |
131 | * not marked as noreturn, so the compiler cannot delete code following an | |
132 | * assert(false) as unused. We rely on this within the code base to delete | |
133 | * code that is unreachable when features are disabled. | |
134 | * All supported versions of Glib's g_assert() satisfy this requirement. | |
135 | */ | |
136 | #ifdef __MINGW32__ | |
137 | #undef assert | |
138 | #define assert(x) g_assert(x) | |
139 | #endif | |
140 | ||
28012e19 MT |
141 | /* |
142 | * According to waitpid man page: | |
143 | * WCOREDUMP | |
144 | * This macro is not specified in POSIX.1-2001 and is not | |
145 | * available on some UNIX implementations (e.g., AIX, SunOS). | |
146 | * Therefore, enclose its use inside #ifdef WCOREDUMP ... #endif. | |
147 | */ | |
148 | #ifndef WCOREDUMP | |
149 | #define WCOREDUMP(status) 0 | |
150 | #endif | |
262a69f4 EB |
151 | /* |
152 | * We have a lot of unaudited code that may fail in strange ways, or | |
153 | * even be a security risk during migration, if you disable assertions | |
154 | * at compile-time. You may comment out these safety checks if you | |
155 | * absolutely want to disable assertion overhead, but it is not | |
156 | * supported upstream so the risk is all yours. Meanwhile, please | |
157 | * submit patches to remove any side-effects inside an assertion, or | |
158 | * fixing error handling that should use Error instead of assert. | |
159 | */ | |
160 | #ifdef NDEBUG | |
161 | #error building with NDEBUG is not supported | |
162 | #endif | |
163 | #ifdef G_DISABLE_ASSERT | |
164 | #error building with G_DISABLE_ASSERT is not supported | |
165 | #endif | |
166 | ||
bfe7e449 PM |
167 | #ifndef O_LARGEFILE |
168 | #define O_LARGEFILE 0 | |
169 | #endif | |
170 | #ifndef O_BINARY | |
171 | #define O_BINARY 0 | |
172 | #endif | |
173 | #ifndef MAP_ANONYMOUS | |
174 | #define MAP_ANONYMOUS MAP_ANON | |
175 | #endif | |
176 | #ifndef ENOMEDIUM | |
177 | #define ENOMEDIUM ENODEV | |
178 | #endif | |
179 | #if !defined(ENOTSUP) | |
180 | #define ENOTSUP 4096 | |
181 | #endif | |
182 | #if !defined(ECANCELED) | |
183 | #define ECANCELED 4097 | |
184 | #endif | |
185 | #if !defined(EMEDIUMTYPE) | |
186 | #define EMEDIUMTYPE 4098 | |
187 | #endif | |
b6f5d3b5 EB |
188 | #if !defined(ESHUTDOWN) |
189 | #define ESHUTDOWN 4099 | |
190 | #endif | |
e7b47c22 PM |
191 | |
192 | /* time_t may be either 32 or 64 bits depending on the host OS, and | |
193 | * can be either signed or unsigned, so we can't just hardcode a | |
194 | * specific maximum value. This is not a C preprocessor constant, | |
195 | * so you can't use TIME_MAX in an #ifdef, but for our purposes | |
196 | * this isn't a problem. | |
197 | */ | |
198 | ||
199 | /* The macros TYPE_SIGNED, TYPE_WIDTH, and TYPE_MAXIMUM are from | |
200 | * Gnulib, and are under the LGPL v2.1 or (at your option) any | |
201 | * later version. | |
202 | */ | |
203 | ||
204 | /* True if the real type T is signed. */ | |
205 | #define TYPE_SIGNED(t) (!((t)0 < (t)-1)) | |
206 | ||
207 | /* The width in bits of the integer type or expression T. | |
208 | * Padding bits are not supported. | |
209 | */ | |
210 | #define TYPE_WIDTH(t) (sizeof(t) * CHAR_BIT) | |
211 | ||
212 | /* The maximum and minimum values for the integer type T. */ | |
213 | #define TYPE_MAXIMUM(t) \ | |
214 | ((t) (!TYPE_SIGNED(t) \ | |
215 | ? (t)-1 \ | |
216 | : ((((t)1 << (TYPE_WIDTH(t) - 2)) - 1) * 2 + 1))) | |
217 | ||
bfe7e449 | 218 | #ifndef TIME_MAX |
e7b47c22 | 219 | #define TIME_MAX TYPE_MAXIMUM(time_t) |
bfe7e449 PM |
220 | #endif |
221 | ||
a8139632 MA |
222 | /* HOST_LONG_BITS is the size of a native pointer in bits. */ |
223 | #if UINTPTR_MAX == UINT32_MAX | |
224 | # define HOST_LONG_BITS 32 | |
225 | #elif UINTPTR_MAX == UINT64_MAX | |
226 | # define HOST_LONG_BITS 64 | |
227 | #else | |
228 | # error Unknown pointer size | |
229 | #endif | |
230 | ||
6b39b063 EB |
231 | /* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with |
232 | * the wrong type. Our replacement isn't usable in preprocessor | |
233 | * expressions, but it is sufficient for our needs. */ | |
234 | #if defined(HAVE_BROKEN_SIZE_MAX) && HAVE_BROKEN_SIZE_MAX | |
235 | #undef SIZE_MAX | |
236 | #define SIZE_MAX ((size_t)-1) | |
237 | #endif | |
238 | ||
df2542c7 JM |
239 | #ifndef MIN |
240 | #define MIN(a, b) (((a) < (b)) ? (a) : (b)) | |
241 | #endif | |
242 | #ifndef MAX | |
243 | #define MAX(a, b) (((a) > (b)) ? (a) : (b)) | |
244 | #endif | |
245 | ||
ac3a8726 PL |
246 | /* Minimum function that returns zero only iff both values are zero. |
247 | * Intended for use with unsigned values only. */ | |
248 | #ifndef MIN_NON_ZERO | |
d27ba624 FZ |
249 | #define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \ |
250 | ((b) == 0 ? (a) : (MIN(a, b)))) | |
ac3a8726 PL |
251 | #endif |
252 | ||
e07e540a MA |
253 | /* Round number down to multiple */ |
254 | #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m)) | |
255 | ||
e9fd416e EB |
256 | /* Round number up to multiple. Safe when m is not a power of 2 (see |
257 | * ROUND_UP for a faster version when a power of 2 is guaranteed) */ | |
e07e540a MA |
258 | #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m)) |
259 | ||
18a60a76 SF |
260 | /* Check if n is a multiple of m */ |
261 | #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) | |
262 | ||
6b587d3c SF |
263 | /* n-byte align pointer down */ |
264 | #define QEMU_ALIGN_PTR_DOWN(p, n) \ | |
265 | ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) | |
266 | ||
267 | /* n-byte align pointer up */ | |
268 | #define QEMU_ALIGN_PTR_UP(p, n) \ | |
269 | ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) | |
270 | ||
271 | /* Check if pointer p is n-bytes aligned */ | |
272 | #define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) | |
273 | ||
e9fd416e EB |
274 | /* Round number up to multiple. Requires that d be a power of 2 (see |
275 | * QEMU_ALIGN_UP for a safer but slower version on arbitrary | |
2098b073 | 276 | * numbers); works even if d is a smaller type than n. */ |
292c8e50 | 277 | #ifndef ROUND_UP |
2098b073 | 278 | #define ROUND_UP(n, d) (((n) + (d) - 1) & -(0 ? (n) : (d))) |
292c8e50 PB |
279 | #endif |
280 | ||
e0e53b2f | 281 | #ifndef DIV_ROUND_UP |
2098b073 | 282 | #define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) |
e0e53b2f CC |
283 | #endif |
284 | ||
ed63ec0d MT |
285 | /* |
286 | * &(x)[0] is always a pointer - if it's same type as x then the argument is a | |
287 | * pointer, not an array. | |
288 | */ | |
289 | #define QEMU_IS_ARRAY(x) (!__builtin_types_compatible_p(typeof(x), \ | |
290 | typeof(&(x)[0]))) | |
0954d0d9 | 291 | #ifndef ARRAY_SIZE |
ed63ec0d MT |
292 | #define ARRAY_SIZE(x) ((sizeof(x) / sizeof((x)[0])) + \ |
293 | QEMU_BUILD_BUG_ON_ZERO(!QEMU_IS_ARRAY(x))) | |
0954d0d9 BS |
294 | #endif |
295 | ||
f97742d0 | 296 | int qemu_daemon(int nochdir, int noclose); |
7d2a35cc | 297 | void *qemu_try_memalign(size_t alignment, size_t size); |
33f00271 | 298 | void *qemu_memalign(size_t alignment, size_t size); |
06329cce | 299 | void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared); |
49b470eb | 300 | void qemu_vfree(void *ptr); |
e7a09b92 | 301 | void qemu_anon_ram_free(void *ptr, size_t size); |
ea88812f | 302 | |
e78815a5 AF |
303 | #define QEMU_MADV_INVALID -1 |
304 | ||
305 | #if defined(CONFIG_MADVISE) | |
306 | ||
307 | #define QEMU_MADV_WILLNEED MADV_WILLNEED | |
308 | #define QEMU_MADV_DONTNEED MADV_DONTNEED | |
309 | #ifdef MADV_DONTFORK | |
310 | #define QEMU_MADV_DONTFORK MADV_DONTFORK | |
311 | #else | |
312 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
313 | #endif | |
314 | #ifdef MADV_MERGEABLE | |
315 | #define QEMU_MADV_MERGEABLE MADV_MERGEABLE | |
316 | #else | |
317 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
318 | #endif | |
605d0a94 PB |
319 | #ifdef MADV_UNMERGEABLE |
320 | #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE | |
321 | #else | |
322 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID | |
323 | #endif | |
324 | #ifdef MADV_DODUMP | |
325 | #define QEMU_MADV_DODUMP MADV_DODUMP | |
326 | #else | |
327 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
328 | #endif | |
ddb97f1d JB |
329 | #ifdef MADV_DONTDUMP |
330 | #define QEMU_MADV_DONTDUMP MADV_DONTDUMP | |
331 | #else | |
332 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID | |
333 | #endif | |
ad0b5321 LC |
334 | #ifdef MADV_HUGEPAGE |
335 | #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE | |
336 | #else | |
337 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID | |
338 | #endif | |
ebf81150 DDAG |
339 | #ifdef MADV_NOHUGEPAGE |
340 | #define QEMU_MADV_NOHUGEPAGE MADV_NOHUGEPAGE | |
341 | #else | |
342 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID | |
343 | #endif | |
0f81d335 EH |
344 | #ifdef MADV_REMOVE |
345 | #define QEMU_MADV_REMOVE MADV_REMOVE | |
346 | #else | |
347 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID | |
348 | #endif | |
e78815a5 AF |
349 | |
350 | #elif defined(CONFIG_POSIX_MADVISE) | |
351 | ||
352 | #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED | |
353 | #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED | |
354 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
355 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
356 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
357 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 358 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 359 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 360 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
0f81d335 | 361 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID |
e78815a5 AF |
362 | |
363 | #else /* no-op */ | |
364 | ||
365 | #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID | |
366 | #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID | |
367 | #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID | |
368 | #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID | |
2925020d MT |
369 | #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID |
370 | #define QEMU_MADV_DODUMP QEMU_MADV_INVALID | |
ddb97f1d | 371 | #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID |
8473f377 | 372 | #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID |
ebf81150 | 373 | #define QEMU_MADV_NOHUGEPAGE QEMU_MADV_INVALID |
0f81d335 | 374 | #define QEMU_MADV_REMOVE QEMU_MADV_INVALID |
e78815a5 AF |
375 | |
376 | #endif | |
377 | ||
d203c643 MAL |
378 | #ifdef _WIN32 |
379 | #define HAVE_CHARDEV_SERIAL 1 | |
380 | #elif defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ | |
381 | || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) \ | |
382 | || defined(__GLIBC__) | |
383 | #define HAVE_CHARDEV_SERIAL 1 | |
384 | #endif | |
385 | ||
386 | #if defined(__linux__) || defined(__FreeBSD__) || \ | |
387 | defined(__FreeBSD_kernel__) || defined(__DragonFly__) | |
388 | #define HAVE_CHARDEV_PARPORT 1 | |
389 | #endif | |
390 | ||
a16fc07e PB |
391 | #if defined(CONFIG_LINUX) |
392 | #ifndef BUS_MCEERR_AR | |
393 | #define BUS_MCEERR_AR 4 | |
394 | #endif | |
395 | #ifndef BUS_MCEERR_AO | |
396 | #define BUS_MCEERR_AO 5 | |
397 | #endif | |
398 | #endif | |
399 | ||
d2f39add | 400 | #if defined(__linux__) && \ |
0c1272cc NP |
401 | (defined(__x86_64__) || defined(__arm__) || defined(__aarch64__) \ |
402 | || defined(__powerpc64__)) | |
d2f39add DD |
403 | /* Use 2 MiB alignment so transparent hugepages can be used by KVM. |
404 | Valgrind does not support alignments larger than 1 MiB, | |
405 | therefore we need special code which handles running on Valgrind. */ | |
406 | # define QEMU_VMALLOC_ALIGN (512 * 4096) | |
407 | #elif defined(__linux__) && defined(__s390x__) | |
408 | /* Use 1 MiB (segment size) alignment so gmap can be used by KVM. */ | |
409 | # define QEMU_VMALLOC_ALIGN (256 * 4096) | |
57d1f6d7 PM |
410 | #elif defined(__linux__) && defined(__sparc__) |
411 | #include <sys/shm.h> | |
038adc2f | 412 | # define QEMU_VMALLOC_ALIGN MAX(qemu_real_host_page_size, SHMLBA) |
d2f39add | 413 | #else |
038adc2f | 414 | # define QEMU_VMALLOC_ALIGN qemu_real_host_page_size |
d2f39add DD |
415 | #endif |
416 | ||
d98d4072 PB |
417 | #ifdef CONFIG_POSIX |
418 | struct qemu_signalfd_siginfo { | |
419 | uint32_t ssi_signo; /* Signal number */ | |
420 | int32_t ssi_errno; /* Error number (unused) */ | |
421 | int32_t ssi_code; /* Signal code */ | |
422 | uint32_t ssi_pid; /* PID of sender */ | |
423 | uint32_t ssi_uid; /* Real UID of sender */ | |
424 | int32_t ssi_fd; /* File descriptor (SIGIO) */ | |
425 | uint32_t ssi_tid; /* Kernel timer ID (POSIX timers) */ | |
426 | uint32_t ssi_band; /* Band event (SIGIO) */ | |
427 | uint32_t ssi_overrun; /* POSIX timer overrun count */ | |
428 | uint32_t ssi_trapno; /* Trap number that caused signal */ | |
429 | int32_t ssi_status; /* Exit status or signal (SIGCHLD) */ | |
430 | int32_t ssi_int; /* Integer sent by sigqueue(2) */ | |
431 | uint64_t ssi_ptr; /* Pointer sent by sigqueue(2) */ | |
432 | uint64_t ssi_utime; /* User CPU time consumed (SIGCHLD) */ | |
433 | uint64_t ssi_stime; /* System CPU time consumed (SIGCHLD) */ | |
434 | uint64_t ssi_addr; /* Address that generated signal | |
435 | (for hardware-generated signals) */ | |
436 | uint8_t pad[48]; /* Pad size to 128 bytes (allow for | |
437 | additional fields in the future) */ | |
438 | }; | |
439 | ||
440 | int qemu_signalfd(const sigset_t *mask); | |
441 | void sigaction_invoke(struct sigaction *action, | |
442 | struct qemu_signalfd_siginfo *info); | |
443 | #endif | |
444 | ||
e78815a5 | 445 | int qemu_madvise(void *addr, size_t len, int advice); |
5fa64b31 EC |
446 | int qemu_mprotect_rwx(void *addr, size_t size); |
447 | int qemu_mprotect_none(void *addr, size_t size); | |
e78815a5 | 448 | |
17e0b6ab AF |
449 | int qemu_open(const char *name, int flags, ...); |
450 | int qemu_close(int fd); | |
ee13240e | 451 | int qemu_unlink(const char *name); |
761d1ddf FZ |
452 | #ifndef _WIN32 |
453 | int qemu_dup(int fd); | |
454 | #endif | |
13461fdb FZ |
455 | int qemu_lock_fd(int fd, int64_t start, int64_t len, bool exclusive); |
456 | int qemu_unlock_fd(int fd, int64_t start, int64_t len); | |
457 | int qemu_lock_fd_test(int fd, int64_t start, int64_t len, bool exclusive); | |
ca749954 | 458 | bool qemu_has_ofd_lock(void); |
17e0b6ab | 459 | |
953ffe0f AF |
460 | #if defined(__HAIKU__) && defined(__i386__) |
461 | #define FMT_pid "%ld" | |
0e0167ba SW |
462 | #elif defined(WIN64) |
463 | #define FMT_pid "%" PRId64 | |
953ffe0f AF |
464 | #else |
465 | #define FMT_pid "%d" | |
466 | #endif | |
467 | ||
9e6bdef2 MAL |
468 | bool qemu_write_pidfile(const char *pidfile, Error **errp); |
469 | ||
dc7a09cf | 470 | int qemu_get_thread_id(void); |
aa26bb2d | 471 | |
9adea5f7 PB |
472 | #ifndef CONFIG_IOVEC |
473 | struct iovec { | |
474 | void *iov_base; | |
475 | size_t iov_len; | |
476 | }; | |
477 | /* | |
478 | * Use the same value as Linux for now. | |
479 | */ | |
480 | #define IOV_MAX 1024 | |
481 | ||
482 | ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); | |
483 | ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); | |
484 | #else | |
485 | #include <sys/uio.h> | |
486 | #endif | |
487 | ||
ad620c29 BS |
488 | #ifdef _WIN32 |
489 | static inline void qemu_timersub(const struct timeval *val1, | |
490 | const struct timeval *val2, | |
491 | struct timeval *res) | |
492 | { | |
493 | res->tv_sec = val1->tv_sec - val2->tv_sec; | |
494 | if (val1->tv_usec < val2->tv_usec) { | |
495 | res->tv_sec--; | |
496 | res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000; | |
497 | } else { | |
498 | res->tv_usec = val1->tv_usec - val2->tv_usec; | |
499 | } | |
500 | } | |
501 | #else | |
502 | #define qemu_timersub timersub | |
503 | #endif | |
504 | ||
49ee3590 AL |
505 | void qemu_set_cloexec(int fd); |
506 | ||
d494352c EH |
507 | /* Starting on QEMU 2.5, qemu_hw_version() returns "2.5+" by default |
508 | * instead of QEMU_VERSION, so setting hw_version on MachineClass | |
509 | * is no longer mandatory. | |
510 | * | |
511 | * Do NOT change this string, or it will break compatibility on all | |
512 | * machine classes that don't set hw_version. | |
513 | */ | |
514 | #define QEMU_HW_VERSION "2.5+" | |
515 | ||
fac862ff | 516 | /* QEMU "hardware version" setting. Used to replace code that exposed |
cb8d4c8f | 517 | * QEMU_VERSION to guests in the past and need to keep compatibility. |
fac862ff EH |
518 | * Do not use qemu_hw_version() in new code. |
519 | */ | |
35c2c8dc EH |
520 | void qemu_set_hw_version(const char *); |
521 | const char *qemu_hw_version(void); | |
93bfef4c | 522 | |
0f66998f PM |
523 | void fips_set_state(bool requested); |
524 | bool fips_get_state(void); | |
525 | ||
e2ea3515 LE |
526 | /* Return a dynamically allocated pathname denoting a file or directory that is |
527 | * appropriate for storing local state. | |
528 | * | |
529 | * @relative_pathname need not start with a directory separator; one will be | |
530 | * added automatically. | |
531 | * | |
532 | * The caller is responsible for releasing the value returned with g_free() | |
533 | * after use. | |
534 | */ | |
535 | char *qemu_get_local_state_pathname(const char *relative_pathname); | |
536 | ||
10f5bff6 FZ |
537 | /* Find program directory, and save it for later usage with |
538 | * qemu_get_exec_dir(). | |
539 | * Try OS specific API first, if not working, parse from argv0. */ | |
540 | void qemu_init_exec_dir(const char *argv0); | |
541 | ||
542 | /* Get the saved exec dir. | |
543 | * Caller needs to release the returned string by g_free() */ | |
544 | char *qemu_get_exec_dir(void); | |
545 | ||
b6a3e690 RH |
546 | /** |
547 | * qemu_getauxval: | |
548 | * @type: the auxiliary vector key to lookup | |
549 | * | |
550 | * Search the auxiliary vector for @type, returning the value | |
551 | * or 0 if @type is not present. | |
552 | */ | |
b6a3e690 | 553 | unsigned long qemu_getauxval(unsigned long type); |
b6a3e690 | 554 | |
13401ba0 SH |
555 | void qemu_set_tty_echo(int fd, bool echo); |
556 | ||
1e356fc1 JK |
557 | void os_mem_prealloc(int fd, char *area, size_t sz, int smp_cpus, |
558 | Error **errp); | |
38183310 | 559 | |
7dc9ae43 MP |
560 | /** |
561 | * qemu_get_pid_name: | |
562 | * @pid: pid of a process | |
563 | * | |
564 | * For given @pid fetch its name. Caller is responsible for | |
565 | * freeing the string when no longer needed. | |
566 | * Returns allocated string on success, NULL on failure. | |
567 | */ | |
568 | char *qemu_get_pid_name(pid_t pid); | |
569 | ||
57cb38b3 DB |
570 | /** |
571 | * qemu_fork: | |
572 | * | |
573 | * A version of fork that avoids signal handler race | |
574 | * conditions that can lead to child process getting | |
575 | * signals that are otherwise only expected by the | |
576 | * parent. It also resets all signal handlers to the | |
577 | * default settings. | |
578 | * | |
579 | * Returns 0 to child process, pid number to parent | |
580 | * or -1 on failure. | |
581 | */ | |
582 | pid_t qemu_fork(Error **errp); | |
583 | ||
3637cf58 EC |
584 | /* Using intptr_t ensures that qemu_*_page_mask is sign-extended even |
585 | * when intptr_t is 32-bit and we are aligning a long long. | |
586 | */ | |
587 | extern uintptr_t qemu_real_host_page_size; | |
588 | extern intptr_t qemu_real_host_page_mask; | |
589 | ||
b255b2c8 | 590 | extern int qemu_icache_linesize; |
5fe21034 | 591 | extern int qemu_icache_linesize_log; |
b255b2c8 | 592 | extern int qemu_dcache_linesize; |
5fe21034 | 593 | extern int qemu_dcache_linesize_log; |
b255b2c8 | 594 | |
d339d766 RJ |
595 | /* |
596 | * After using getopt or getopt_long, if you need to parse another set | |
597 | * of options, then you must reset optind. Unfortunately the way to | |
598 | * do this varies between implementations of getopt. | |
599 | */ | |
600 | static inline void qemu_reset_optind(void) | |
601 | { | |
602 | #ifdef HAVE_OPTRESET | |
603 | optind = 1; | |
604 | optreset = 1; | |
605 | #else | |
606 | optind = 0; | |
607 | #endif | |
608 | } | |
609 | ||
ea88812f | 610 | #endif |