2 * OS includes and handling of OS dependencies
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).
8 * To avoid getting into possible circular include dependencies, this
9 * file should not include any other QEMU headers, with the exceptions
10 * of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which
11 * are doing a similar job to this file and are under similar constraints.
13 * This header also contains prototypes for functions defined in
14 * os-*.c and util/oslib-*.c; those would probably be better split
15 * out into separate header files.
17 * In an ideal world this header would contain only:
18 * (1) things which everybody needs
19 * (2) things without which code would work on most platforms but
20 * fail to compile or misbehave on a minority of host OSes
22 * This work is licensed under the terms of the GNU GPL, version 2 or later.
23 * See the COPYING file in the top-level directory.
28 #include "config-host.h"
29 #include "qemu/compiler.h"
34 #include <sys/types.h>
41 /* Put unistd.h before time.h as that triggers localtime_r/gmtime_r
42 * function availability on recentish Mingw-w64 platforms. */
54 #include <sys/signal.h>
60 #define WIFEXITED(x) 1
61 #define WEXITSTATUS(x) (x)
65 #include "sysemu/os-win32.h"
69 #include "sysemu/os-posix.h"
72 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
73 /* [u]int_fast*_t not in <sys/int_types.h> */
74 typedef unsigned char uint_fast8_t;
75 typedef unsigned int uint_fast16_t;
76 typedef signed int int_fast16_t;
86 #define MAP_ANONYMOUS MAP_ANON
89 #define ENOMEDIUM ENODEV
94 #if !defined(ECANCELED)
95 #define ECANCELED 4097
97 #if !defined(EMEDIUMTYPE)
98 #define EMEDIUMTYPE 4098
101 #define TIME_MAX LONG_MAX
105 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
108 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
111 /* Minimum function that returns zero only iff both values are zero.
112 * Intended for use with unsigned values only. */
114 #define MIN_NON_ZERO(a, b) (((a) != 0 && (a) < (b)) ? (a) : (b))
118 #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d))
122 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
126 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
129 int qemu_daemon(int nochdir, int noclose);
130 void *qemu_try_memalign(size_t alignment, size_t size);
131 void *qemu_memalign(size_t alignment, size_t size);
132 void *qemu_anon_ram_alloc(size_t size, uint64_t *align);
133 void qemu_vfree(void *ptr);
134 void qemu_anon_ram_free(void *ptr, size_t size);
136 #define QEMU_MADV_INVALID -1
138 #if defined(CONFIG_MADVISE)
140 #define QEMU_MADV_WILLNEED MADV_WILLNEED
141 #define QEMU_MADV_DONTNEED MADV_DONTNEED
143 #define QEMU_MADV_DONTFORK MADV_DONTFORK
145 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
147 #ifdef MADV_MERGEABLE
148 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE
150 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
152 #ifdef MADV_UNMERGEABLE
153 #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE
155 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
158 #define QEMU_MADV_DODUMP MADV_DODUMP
160 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
163 #define QEMU_MADV_DONTDUMP MADV_DONTDUMP
165 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
168 #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE
170 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
173 #elif defined(CONFIG_POSIX_MADVISE)
175 #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
176 #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
177 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
178 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
179 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
180 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
181 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
182 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
186 #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
187 #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
188 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
189 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
190 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID
191 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID
192 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
193 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID
197 int qemu_madvise(void *addr, size_t len, int advice);
199 int qemu_open(const char *name, int flags, ...);
200 int qemu_close(int fd);
202 #if defined(__HAIKU__) && defined(__i386__)
203 #define FMT_pid "%ld"
205 #define FMT_pid "%" PRId64
210 int qemu_create_pidfile(const char *filename);
211 int qemu_get_thread_id(void);
219 * Use the same value as Linux for now.
223 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
224 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);
230 static inline void qemu_timersub(const struct timeval *val1,
231 const struct timeval *val2,
234 res->tv_sec = val1->tv_sec - val2->tv_sec;
235 if (val1->tv_usec < val2->tv_usec) {
237 res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
239 res->tv_usec = val1->tv_usec - val2->tv_usec;
243 #define qemu_timersub timersub
246 void qemu_set_cloexec(int fd);
248 void qemu_set_version(const char *);
249 const char *qemu_get_version(void);
251 void fips_set_state(bool requested);
252 bool fips_get_state(void);
254 /* Return a dynamically allocated pathname denoting a file or directory that is
255 * appropriate for storing local state.
257 * @relative_pathname need not start with a directory separator; one will be
258 * added automatically.
260 * The caller is responsible for releasing the value returned with g_free()
263 char *qemu_get_local_state_pathname(const char *relative_pathname);
265 /* Find program directory, and save it for later usage with
266 * qemu_get_exec_dir().
267 * Try OS specific API first, if not working, parse from argv0. */
268 void qemu_init_exec_dir(const char *argv0);
270 /* Get the saved exec dir.
271 * Caller needs to release the returned string by g_free() */
272 char *qemu_get_exec_dir(void);
276 * @type: the auxiliary vector key to lookup
278 * Search the auxiliary vector for @type, returning the value
279 * or 0 if @type is not present.
281 unsigned long qemu_getauxval(unsigned long type);
283 void qemu_set_tty_echo(int fd, bool echo);
285 void os_mem_prealloc(int fd, char *area, size_t sz);
287 int qemu_read_password(char *buf, int buf_size);