qemu-e2k/include/sysemu/os-win32.h

198 lines
6.0 KiB
C
Raw Normal View History

/*
* win32 specific declarations
*
* Copyright (c) 2003-2008 Fabrice Bellard
* Copyright (c) 2010 Jes Sorensen <Jes.Sorensen@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef QEMU_OS_WIN32_H
#define QEMU_OS_WIN32_H
#include <winsock2.h>
#include <windows.h>
osdep: add wrappers for socket functions The windows socket functions look identical to the normal POSIX sockets functions, but instead of setting errno, the caller needs to call WSAGetLastError(). QEMU has tried to deal with this incompatibility by defining a socket_error() method that callers must use that abstracts the difference between WSAGetLastError() and errno. This approach is somewhat error prone though - many callers of the sockets functions are just using errno directly because it is easy to forget the need use a QEMU specific wrapper. It is not always immediately obvious that a particular function will in fact call into Windows sockets functions, so the dev may not even realize they need to use socket_error(). This introduces an alternative approach to portability inspired by the way GNULIB fixes portability problems. We use a macro to redefine the original socket function names to refer to a QEMU wrapper function. The wrapper function calls the original Win32 sockets method and then sets errno from the WSAGetLastError() value. Thus all code can simply call the normal POSIX sockets APIs are have standard errno reporting on error, even on Windows. This makes the socket_error() method obsolete. We also bring closesocket & ioctlsocket into this approach. Even though they are non-standard Win32 names, we can't wrap the normal close/ioctl methods since there's no reliable way to distinguish between a file descriptor and HANDLE in Win32. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-07 21:25:19 +01:00
#include <ws2tcpip.h>
#if defined(_WIN64)
/* On w64, setjmp is implemented by _setjmp which needs a second parameter.
* If this parameter is NULL, longjump does no stack unwinding.
* That is what we need for QEMU. Passing the value of register rsp (default)
* lets longjmp try a stack unwinding which will crash with generated code. */
# undef setjmp
# define setjmp(env) _setjmp(env, NULL)
#endif
Replace all setjmp()/longjmp() with sigsetjmp()/siglongjmp() The setjmp() function doesn't specify whether signal masks are saved and restored; on Linux they are not, but on BSD (including MacOSX) they are. We want to have consistent behaviour across platforms, so we should always use "don't save/restore signal mask" (this is also generally going to be faster). This also works around a bug in MacOSX where the signal-restoration on longjmp() affects the signal mask for a completely different thread, not just the mask for the thread which did the longjmp. The most visible effect of this was that ctrl-C was ignored on MacOSX because the CPU thread did a longjmp which resulted in its signal mask being applied to every thread, so that all threads had SIGINT and SIGTERM blocked. The POSIX-sanctioned portable way to do a jump without affecting signal masks is to siglongjmp() to a sigjmp_buf which was created by calling sigsetjmp() with a zero savemask parameter, so change all uses of setjmp()/longjmp() accordingly. [Technically POSIX allows sigsetjmp(buf, 0) to save the signal mask; however the following siglongjmp() must not restore the signal mask, so the pair can be effectively considered as "sigjmp/longjmp which don't touch the mask".] For Windows we provide a trivial sigsetjmp/siglongjmp in terms of setjmp/longjmp -- this is OK because no user will ever pass a non-zero savemask. The setjmp() uses in tests/tcg/test-i386.c and tests/tcg/linux-test.c are left untouched because these are self-contained singlethreaded test programs intended to be run under QEMU's Linux emulation, so they have neither the portability nor the multithreading issues to deal with. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <rth@twiddle.net> Tested-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-02-20 16:21:09 +01:00
/* QEMU uses sigsetjmp()/siglongjmp() as the portable way to specify
* "longjmp and don't touch the signal masks". Since we know that the
* savemask parameter will always be zero we can safely define these
* in terms of setjmp/longjmp on Win32.
*/
#define sigjmp_buf jmp_buf
#define sigsetjmp(env, savemask) setjmp(env)
#define siglongjmp(env, val) longjmp(env, val)
/* Missing POSIX functions. Don't use MinGW-w64 macros. */
oslib-win32: only provide localtime_r/gmtime_r if missing The oslib-win32 file currently provides a localtime_r and gmtime_r replacement unconditionally. Some versions of Mingw-w64 would provide crude macros for localtime_r/gmtime_r which QEMU takes care to disable. Latest versions of Mingw-w64 now provide actual functions for localtime_r/gmtime_r, but with a twist that you have to include unistd.h or pthread.h before including time.h. By luck some files in QEMU have such an include order, resulting in compile errors: CC util/osdep.o In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:77:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls] struct tm *gmtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:272:107: note: previous definition of 'gmtime_r' was here In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:79:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls] struct tm *localtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:269:107: note: previous definition of 'localtime_r' was here This change adds a configure test to see if localtime_r exits, and only enables the QEMU impl if missing. We also re-arrange qemu-common.h try attempt to guarantee that all source files get unistd.h before time.h and thus see the localtime_r/gmtime_r defs. [sw: Use "official" spellings for Mingw-w64, MinGW in comments.] [sw: Terminate sentences with a dot in comments.] Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Stefan Weil <sw@weilnetz.de>
2015-09-22 16:13:26 +02:00
#ifndef CONFIG_LOCALTIME_R
#undef gmtime_r
struct tm *gmtime_r(const time_t *timep, struct tm *result);
#undef localtime_r
struct tm *localtime_r(const time_t *timep, struct tm *result);
oslib-win32: only provide localtime_r/gmtime_r if missing The oslib-win32 file currently provides a localtime_r and gmtime_r replacement unconditionally. Some versions of Mingw-w64 would provide crude macros for localtime_r/gmtime_r which QEMU takes care to disable. Latest versions of Mingw-w64 now provide actual functions for localtime_r/gmtime_r, but with a twist that you have to include unistd.h or pthread.h before including time.h. By luck some files in QEMU have such an include order, resulting in compile errors: CC util/osdep.o In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:77:12: error: redundant redeclaration of 'gmtime_r' [-Werror=redundant-decls] struct tm *gmtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:272:107: note: previous definition of 'gmtime_r' was here In file included from include/qemu-common.h:48:0, from util/osdep.c:48: include/sysemu/os-win32.h:79:12: error: redundant redeclaration of 'localtime_r' [-Werror=redundant-decls] struct tm *localtime_r(const time_t *timep, struct tm *result); ^ In file included from include/qemu-common.h:35:0, from util/osdep.c:48: /usr/i686-w64-mingw32/sys-root/mingw/include/time.h:269:107: note: previous definition of 'localtime_r' was here This change adds a configure test to see if localtime_r exits, and only enables the QEMU impl if missing. We also re-arrange qemu-common.h try attempt to guarantee that all source files get unistd.h before time.h and thus see the localtime_r/gmtime_r defs. [sw: Use "official" spellings for Mingw-w64, MinGW in comments.] [sw: Terminate sentences with a dot in comments.] Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Stefan Weil <sw@weilnetz.de>
2015-09-22 16:13:26 +02:00
#endif /* CONFIG_LOCALTIME_R */
static inline void os_setup_signal_handling(void) {}
static inline void os_daemonize(void) {}
static inline void os_setup_post(void) {}
void os_set_line_buffering(void);
static inline void os_set_proc_name(const char *dummy) {}
int getpagesize(void);
#if !defined(EPROTONOSUPPORT)
# define EPROTONOSUPPORT EINVAL
#endif
typedef struct {
long tv_sec;
long tv_usec;
} qemu_timeval;
int qemu_gettimeofday(qemu_timeval *tp);
static inline bool is_daemonized(void)
{
return false;
}
static inline int os_mlock(void)
{
return -ENOSYS;
}
#define fsync _commit
#if !defined(lseek)
# define lseek _lseeki64
#endif
int qemu_ftruncate64(int, int64_t);
#if !defined(ftruncate)
# define ftruncate qemu_ftruncate64
#endif
static inline char *realpath(const char *path, char *resolved_path)
{
_fullpath(resolved_path, path, _MAX_PATH);
return resolved_path;
}
/* ??? Mingw appears to export _lock_file and _unlock_file as the functions
* with which to lock a stdio handle. But something is wrong in the markup,
* either in the header or the library, such that we get undefined references
* to "_imp___lock_file" etc when linking. Since we seem to have no other
* alternative, and the usage within the logging functions isn't critical,
* ignore FILE locking.
*/
static inline void qemu_flockfile(FILE *f)
{
}
static inline void qemu_funlockfile(FILE *f)
{
}
osdep: add wrappers for socket functions The windows socket functions look identical to the normal POSIX sockets functions, but instead of setting errno, the caller needs to call WSAGetLastError(). QEMU has tried to deal with this incompatibility by defining a socket_error() method that callers must use that abstracts the difference between WSAGetLastError() and errno. This approach is somewhat error prone though - many callers of the sockets functions are just using errno directly because it is easy to forget the need use a QEMU specific wrapper. It is not always immediately obvious that a particular function will in fact call into Windows sockets functions, so the dev may not even realize they need to use socket_error(). This introduces an alternative approach to portability inspired by the way GNULIB fixes portability problems. We use a macro to redefine the original socket function names to refer to a QEMU wrapper function. The wrapper function calls the original Win32 sockets method and then sets errno from the WSAGetLastError() value. Thus all code can simply call the normal POSIX sockets APIs are have standard errno reporting on error, even on Windows. This makes the socket_error() method obsolete. We also bring closesocket & ioctlsocket into this approach. Even though they are non-standard Win32 names, we can't wrap the normal close/ioctl methods since there's no reliable way to distinguish between a file descriptor and HANDLE in Win32. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2016-03-07 21:25:19 +01:00
/* We wrap all the sockets functions so that we can
* set errno based on WSAGetLastError()
*/
#undef connect
#define connect qemu_connect_wrap
int qemu_connect_wrap(int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
#undef listen
#define listen qemu_listen_wrap
int qemu_listen_wrap(int sockfd, int backlog);
#undef bind
#define bind qemu_bind_wrap
int qemu_bind_wrap(int sockfd, const struct sockaddr *addr,
socklen_t addrlen);
#undef socket
#define socket qemu_socket_wrap
int qemu_socket_wrap(int domain, int type, int protocol);
#undef accept
#define accept qemu_accept_wrap
int qemu_accept_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef shutdown
#define shutdown qemu_shutdown_wrap
int qemu_shutdown_wrap(int sockfd, int how);
#undef ioctlsocket
#define ioctlsocket qemu_ioctlsocket_wrap
int qemu_ioctlsocket_wrap(int fd, int req, void *val);
#undef closesocket
#define closesocket qemu_closesocket_wrap
int qemu_closesocket_wrap(int fd);
#undef getsockopt
#define getsockopt qemu_getsockopt_wrap
int qemu_getsockopt_wrap(int sockfd, int level, int optname,
void *optval, socklen_t *optlen);
#undef setsockopt
#define setsockopt qemu_setsockopt_wrap
int qemu_setsockopt_wrap(int sockfd, int level, int optname,
const void *optval, socklen_t optlen);
#undef getpeername
#define getpeername qemu_getpeername_wrap
int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef getsockname
#define getsockname qemu_getsockname_wrap
int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr,
socklen_t *addrlen);
#undef send
#define send qemu_send_wrap
ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags);
#undef sendto
#define sendto qemu_sendto_wrap
ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *addr, socklen_t addrlen);
#undef recv
#define recv qemu_recv_wrap
ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
#undef recvfrom
#define recvfrom qemu_recvfrom_wrap
ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
struct sockaddr *addr, socklen_t *addrlen);
#endif