1 #ifndef QEMU_OSDEP_H 2 #define QEMU_OSDEP_H 3 4 #include "config-host.h" 5 #include <stdarg.h> 6 #include <stddef.h> 7 #include <stdbool.h> 8 #include <sys/types.h> 9 #ifdef __OpenBSD__ 10 #include <sys/signal.h> 11 #endif 12 13 #ifndef _WIN32 14 #include <sys/wait.h> 15 #else 16 #define WIFEXITED(x) 1 17 #define WEXITSTATUS(x) (x) 18 #endif 19 20 #include <sys/time.h> 21 22 #if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10 23 /* [u]int_fast*_t not in <sys/int_types.h> */ 24 typedef unsigned char uint_fast8_t; 25 typedef unsigned int uint_fast16_t; 26 typedef signed int int_fast16_t; 27 #endif 28 29 #ifndef glue 30 #define xglue(x, y) x ## y 31 #define glue(x, y) xglue(x, y) 32 #define stringify(s) tostring(s) 33 #define tostring(s) #s 34 #endif 35 36 #ifndef likely 37 #if __GNUC__ < 3 38 #define __builtin_expect(x, n) (x) 39 #endif 40 41 #define likely(x) __builtin_expect(!!(x), 1) 42 #define unlikely(x) __builtin_expect(!!(x), 0) 43 #endif 44 45 #ifndef container_of 46 #define container_of(ptr, type, member) ({ \ 47 const typeof(((type *) 0)->member) *__mptr = (ptr); \ 48 (type *) ((char *) __mptr - offsetof(type, member));}) 49 #endif 50 51 /* Convert from a base type to a parent type, with compile time checking. */ 52 #ifdef __GNUC__ 53 #define DO_UPCAST(type, field, dev) ( __extension__ ( { \ 54 char __attribute__((unused)) offset_must_be_zero[ \ 55 -offsetof(type, field)]; \ 56 container_of(dev, type, field);})) 57 #else 58 #define DO_UPCAST(type, field, dev) container_of(dev, type, field) 59 #endif 60 61 #define typeof_field(type, field) typeof(((type *)0)->field) 62 #define type_check(t1,t2) ((t1*)0 - (t2*)0) 63 64 #ifndef MIN 65 #define MIN(a, b) (((a) < (b)) ? (a) : (b)) 66 #endif 67 #ifndef MAX 68 #define MAX(a, b) (((a) > (b)) ? (a) : (b)) 69 #endif 70 71 #ifndef ROUND_UP 72 #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d)) 73 #endif 74 75 #ifndef DIV_ROUND_UP 76 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) 77 #endif 78 79 #ifndef ARRAY_SIZE 80 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) 81 #endif 82 83 #ifndef always_inline 84 #if !((__GNUC__ < 3) || defined(__APPLE__)) 85 #ifdef __OPTIMIZE__ 86 #undef inline 87 #define inline __attribute__ (( always_inline )) __inline__ 88 #endif 89 #endif 90 #else 91 #undef inline 92 #define inline always_inline 93 #endif 94 95 #define qemu_printf printf 96 97 int qemu_daemon(int nochdir, int noclose); 98 void *qemu_memalign(size_t alignment, size_t size); 99 void *qemu_anon_ram_alloc(size_t size); 100 void qemu_vfree(void *ptr); 101 void qemu_anon_ram_free(void *ptr, size_t size); 102 103 #define QEMU_MADV_INVALID -1 104 105 #if defined(CONFIG_MADVISE) 106 107 #define QEMU_MADV_WILLNEED MADV_WILLNEED 108 #define QEMU_MADV_DONTNEED MADV_DONTNEED 109 #ifdef MADV_DONTFORK 110 #define QEMU_MADV_DONTFORK MADV_DONTFORK 111 #else 112 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID 113 #endif 114 #ifdef MADV_MERGEABLE 115 #define QEMU_MADV_MERGEABLE MADV_MERGEABLE 116 #else 117 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID 118 #endif 119 #ifdef MADV_UNMERGEABLE 120 #define QEMU_MADV_UNMERGEABLE MADV_UNMERGEABLE 121 #else 122 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID 123 #endif 124 #ifdef MADV_DODUMP 125 #define QEMU_MADV_DODUMP MADV_DODUMP 126 #else 127 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID 128 #endif 129 #ifdef MADV_DONTDUMP 130 #define QEMU_MADV_DONTDUMP MADV_DONTDUMP 131 #else 132 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID 133 #endif 134 #ifdef MADV_HUGEPAGE 135 #define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE 136 #else 137 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID 138 #endif 139 140 #elif defined(CONFIG_POSIX_MADVISE) 141 142 #define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED 143 #define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED 144 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID 145 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID 146 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID 147 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID 148 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID 149 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID 150 151 #else /* no-op */ 152 153 #define QEMU_MADV_WILLNEED QEMU_MADV_INVALID 154 #define QEMU_MADV_DONTNEED QEMU_MADV_INVALID 155 #define QEMU_MADV_DONTFORK QEMU_MADV_INVALID 156 #define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID 157 #define QEMU_MADV_UNMERGEABLE QEMU_MADV_INVALID 158 #define QEMU_MADV_DODUMP QEMU_MADV_INVALID 159 #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID 160 #define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID 161 162 #endif 163 164 int qemu_madvise(void *addr, size_t len, int advice); 165 166 int qemu_open(const char *name, int flags, ...); 167 int qemu_close(int fd); 168 169 #if defined(__HAIKU__) && defined(__i386__) 170 #define FMT_pid "%ld" 171 #elif defined(WIN64) 172 #define FMT_pid "%" PRId64 173 #else 174 #define FMT_pid "%d" 175 #endif 176 177 int qemu_create_pidfile(const char *filename); 178 int qemu_get_thread_id(void); 179 180 #ifndef CONFIG_IOVEC 181 struct iovec { 182 void *iov_base; 183 size_t iov_len; 184 }; 185 /* 186 * Use the same value as Linux for now. 187 */ 188 #define IOV_MAX 1024 189 190 ssize_t readv(int fd, const struct iovec *iov, int iov_cnt); 191 ssize_t writev(int fd, const struct iovec *iov, int iov_cnt); 192 #else 193 #include <sys/uio.h> 194 #endif 195 196 #ifdef _WIN32 197 static inline void qemu_timersub(const struct timeval *val1, 198 const struct timeval *val2, 199 struct timeval *res) 200 { 201 res->tv_sec = val1->tv_sec - val2->tv_sec; 202 if (val1->tv_usec < val2->tv_usec) { 203 res->tv_sec--; 204 res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000; 205 } else { 206 res->tv_usec = val1->tv_usec - val2->tv_usec; 207 } 208 } 209 #else 210 #define qemu_timersub timersub 211 #endif 212 213 void qemu_set_cloexec(int fd); 214 215 void qemu_set_version(const char *); 216 const char *qemu_get_version(void); 217 218 void fips_set_state(bool requested); 219 bool fips_get_state(void); 220 221 /* Return a dynamically allocated pathname denoting a file or directory that is 222 * appropriate for storing local state. 223 * 224 * @relative_pathname need not start with a directory separator; one will be 225 * added automatically. 226 * 227 * The caller is responsible for releasing the value returned with g_free() 228 * after use. 229 */ 230 char *qemu_get_local_state_pathname(const char *relative_pathname); 231 232 /* Find program directory, and save it for later usage with 233 * qemu_get_exec_dir(). 234 * Try OS specific API first, if not working, parse from argv0. */ 235 void qemu_init_exec_dir(const char *argv0); 236 237 /* Get the saved exec dir. 238 * Caller needs to release the returned string by g_free() */ 239 char *qemu_get_exec_dir(void); 240 241 /** 242 * qemu_getauxval: 243 * @type: the auxiliary vector key to lookup 244 * 245 * Search the auxiliary vector for @type, returning the value 246 * or 0 if @type is not present. 247 */ 248 #if defined(CONFIG_GETAUXVAL) || defined(__linux__) 249 unsigned long qemu_getauxval(unsigned long type); 250 #else 251 static inline unsigned long qemu_getauxval(unsigned long type) { return 0; } 252 #endif 253 254 void qemu_set_tty_echo(int fd, bool echo); 255 256 void os_mem_prealloc(int fd, char *area, size_t sz); 257 258 #endif 259