1 /*
2 * win32 specific declarations
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26 #ifndef QEMU_OS_WIN32_H
27 #define QEMU_OS_WIN32_H
28
29 #include <winsock2.h>
30 #include <windows.h>
31 #include <ws2tcpip.h>
32 #include "qemu/typedefs.h"
33
34 #ifdef HAVE_AFUNIX_H
35 #include <afunix.h>
36 #else
37 /*
38 * Fallback definitions of things we need in afunix.h, if not available from
39 * the used Windows SDK or MinGW headers.
40 */
41 #define UNIX_PATH_MAX 108
42
43 typedef struct sockaddr_un {
44 ADDRESS_FAMILY sun_family;
45 char sun_path[UNIX_PATH_MAX];
46 } SOCKADDR_UN, *PSOCKADDR_UN;
47
48 #define SIO_AF_UNIX_GETPEERPID _WSAIOR(IOC_VENDOR, 256)
49 #endif
50
51 #ifdef __cplusplus
52 extern "C" {
53 #endif
54
55 #if defined(__aarch64__)
56 /*
57 * On windows-arm64, setjmp is available in only one variant, and longjmp always
58 * does stack unwinding. This crash with generated code.
59 * Thus, we use another implementation of setjmp (not windows one), coming from
60 * mingw, which never performs stack unwinding.
61 */
62 #undef setjmp
63 #undef longjmp
64 /*
65 * These functions are not declared in setjmp.h because __aarch64__ defines
66 * setjmp to _setjmpex instead. However, they are still defined in libmingwex.a,
67 * which gets linked automatically.
68 */
69 int __mingw_setjmp(jmp_buf);
70 void __attribute__((noreturn)) __mingw_longjmp(jmp_buf, int);
71 #define setjmp(env) __mingw_setjmp(env)
72 #define longjmp(env, val) __mingw_longjmp(env, val)
73 #elif defined(_WIN64)
74 /*
75 * On windows-x64, setjmp is implemented by _setjmp which needs a second parameter.
76 * If this parameter is NULL, longjump does no stack unwinding.
77 * That is what we need for QEMU. Passing the value of register rsp (default)
78 * lets longjmp try a stack unwinding which will crash with generated code.
79 */
80 # undef setjmp
81 # define setjmp(env) _setjmp(env, NULL)
82 #endif /* __aarch64__ */
83 /* QEMU uses sigsetjmp()/siglongjmp() as the portable way to specify
84 * "longjmp and don't touch the signal masks". Since we know that the
85 * savemask parameter will always be zero we can safely define these
86 * in terms of setjmp/longjmp on Win32.
87 */
88 #define sigjmp_buf jmp_buf
89 #define sigsetjmp(env, savemask) setjmp(env)
90 #define siglongjmp(env, val) longjmp(env, val)
91
92 /* Missing POSIX functions. Don't use MinGW-w64 macros. */
93 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS
94 #undef gmtime_r
95 struct tm *gmtime_r(const time_t *timep, struct tm *result);
96 #undef localtime_r
97 struct tm *localtime_r(const time_t *timep, struct tm *result);
98 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */
99
os_setup_signal_handling(void)100 static inline void os_setup_signal_handling(void) {}
os_daemonize(void)101 static inline void os_daemonize(void) {}
os_setup_post(void)102 static inline void os_setup_post(void) {}
os_set_proc_name(const char * dummy)103 static inline void os_set_proc_name(const char *dummy) {}
104 void os_set_line_buffering(void);
105 void os_setup_early_signal_handling(void);
106
107 int getpagesize(void);
108
109 #if !defined(EPROTONOSUPPORT)
110 # define EPROTONOSUPPORT EINVAL
111 #endif
112
os_set_daemonize(bool d)113 static inline int os_set_daemonize(bool d)
114 {
115 if (d) {
116 return -ENOTSUP;
117 }
118 return 0;
119 }
120
is_daemonized(void)121 static inline bool is_daemonized(void)
122 {
123 return false;
124 }
125
os_mlock(void)126 static inline int os_mlock(void)
127 {
128 return -ENOSYS;
129 }
130
os_setup_limits(void)131 static inline void os_setup_limits(void)
132 {
133 return;
134 }
135
136 #define fsync _commit
137
138 #if !defined(lseek)
139 # define lseek _lseeki64
140 #endif
141
142 int qemu_ftruncate64(int, int64_t);
143
144 #if !defined(ftruncate)
145 # define ftruncate qemu_ftruncate64
146 #endif
147
realpath(const char * path,char * resolved_path)148 static inline char *realpath(const char *path, char *resolved_path)
149 {
150 _fullpath(resolved_path, path, _MAX_PATH);
151 return resolved_path;
152 }
153
154 /*
155 * Older versions of MinGW do not import _lock_file and _unlock_file properly.
156 * This was fixed for v6.0.0 with commit b48e3ac8969d.
157 */
qemu_flockfile(FILE * f)158 static inline void qemu_flockfile(FILE *f)
159 {
160 #ifdef HAVE__LOCK_FILE
161 _lock_file(f);
162 #endif
163 }
164
qemu_funlockfile(FILE * f)165 static inline void qemu_funlockfile(FILE *f)
166 {
167 #ifdef HAVE__LOCK_FILE
168 _unlock_file(f);
169 #endif
170 }
171
172 /* Helper for WSAEventSelect, to report errors */
173 bool qemu_socket_select(int sockfd, WSAEVENT hEventObject,
174 long lNetworkEvents, Error **errp);
175
176 bool qemu_socket_unselect(int sockfd, Error **errp);
177
178 /* We wrap all the sockets functions so that we can set errno based on
179 * WSAGetLastError(), and use file-descriptors instead of SOCKET.
180 */
181
182 /*
183 * qemu_close_socket_osfhandle:
184 * @fd: a file descriptor associated with a SOCKET
185 *
186 * Close only the C run-time file descriptor, leave the SOCKET opened.
187 *
188 * Returns zero on success. On error, -1 is returned, and errno is set to
189 * indicate the error.
190 */
191 int qemu_close_socket_osfhandle(int fd);
192
193 #undef close
194 #define close qemu_close_wrap
195 int qemu_close_wrap(int fd);
196
197 #undef connect
198 #define connect qemu_connect_wrap
199 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
200 socklen_t addrlen);
201
202 #undef listen
203 #define listen qemu_listen_wrap
204 int qemu_listen_wrap(int sockfd, int backlog);
205
206 #undef bind
207 #define bind qemu_bind_wrap
208 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
209 socklen_t addrlen);
210
211 #undef socket
212 #define socket qemu_socket_wrap
213 int qemu_socket_wrap(int domain, int type, int protocol);
214
215 #undef accept
216 #define accept qemu_accept_wrap
217 int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
218 socklen_t *addrlen);
219
220 #undef shutdown
221 #define shutdown qemu_shutdown_wrap
222 int qemu_shutdown_wrap(int sockfd, int how);
223
224 #undef ioctlsocket
225 #define ioctlsocket qemu_ioctlsocket_wrap
226 int qemu_ioctlsocket_wrap(int fd, int req, void *val);
227
228 #undef getsockopt
229 #define getsockopt qemu_getsockopt_wrap
230 int qemu_getsockopt_wrap(int sockfd, int level, int optname,
231 void *optval, socklen_t *optlen);
232
233 #undef setsockopt
234 #define setsockopt qemu_setsockopt_wrap
235 int qemu_setsockopt_wrap(int sockfd, int level, int optname,
236 const void *optval, socklen_t optlen);
237
238 #undef getpeername
239 #define getpeername qemu_getpeername_wrap
240 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
241 socklen_t *addrlen);
242
243 #undef getsockname
244 #define getsockname qemu_getsockname_wrap
245 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
246 socklen_t *addrlen);
247
248 #undef send
249 #define send qemu_send_wrap
250 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags);
251
252 #undef sendto
253 #define sendto qemu_sendto_wrap
254 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
255 const struct sockaddr *addr, socklen_t addrlen);
256
257 #undef recv
258 #define recv qemu_recv_wrap
259 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
260
261 #undef recvfrom
262 #define recvfrom qemu_recvfrom_wrap
263 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
264 struct sockaddr *addr, socklen_t *addrlen);
265
266 EXCEPTION_DISPOSITION
267 win32_close_exception_handler(struct _EXCEPTION_RECORD*, void*,
268 struct _CONTEXT*, void*);
269
270 void *qemu_win32_map_alloc(size_t size, HANDLE *h, Error **errp);
271 void qemu_win32_map_free(void *ptr, HANDLE h, Error **errp);
272
273 #ifdef __cplusplus
274 }
275 #endif
276
277 #endif
278