1 /* 2 * os-win32.c 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * Copyright (c) 2010-2016 Red Hat, Inc. 6 * 7 * QEMU library functions for win32 which are shared between QEMU and 8 * the QEMU tools. 9 * 10 * Permission is hereby granted, free of charge, to any person obtaining a copy 11 * of this software and associated documentation files (the "Software"), to deal 12 * in the Software without restriction, including without limitation the rights 13 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 14 * copies of the Software, and to permit persons to whom the Software is 15 * furnished to do so, subject to the following conditions: 16 * 17 * The above copyright notice and this permission notice shall be included in 18 * all copies or substantial portions of the Software. 19 * 20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 21 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 23 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 24 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 25 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 26 * THE SOFTWARE. 27 */ 28 29 #include "qemu/osdep.h" 30 #include <windows.h> 31 #include "qapi/error.h" 32 #include "qemu/main-loop.h" 33 #include "trace.h" 34 #include "qemu/sockets.h" 35 #include "qemu/cutils.h" 36 #include "qemu/error-report.h" 37 #include <malloc.h> 38 39 static int get_allocation_granularity(void) 40 { 41 SYSTEM_INFO system_info; 42 43 GetSystemInfo(&system_info); 44 return system_info.dwAllocationGranularity; 45 } 46 47 void *qemu_anon_ram_alloc(size_t size, uint64_t *align, bool shared, 48 bool noreserve) 49 { 50 void *ptr; 51 52 if (noreserve) { 53 /* 54 * We need a MEM_COMMIT before accessing any memory in a MEM_RESERVE 55 * area; we cannot easily mimic POSIX MAP_NORESERVE semantics. 56 */ 57 error_report("Skipping reservation of swap space is not supported."); 58 return NULL; 59 } 60 61 ptr = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE); 62 trace_qemu_anon_ram_alloc(size, ptr); 63 64 if (ptr && align) { 65 *align = MAX(get_allocation_granularity(), getpagesize()); 66 } 67 return ptr; 68 } 69 70 void qemu_anon_ram_free(void *ptr, size_t size) 71 { 72 trace_qemu_anon_ram_free(ptr, size); 73 if (ptr) { 74 VirtualFree(ptr, 0, MEM_RELEASE); 75 } 76 } 77 78 #ifndef _POSIX_THREAD_SAFE_FUNCTIONS 79 /* FIXME: add proper locking */ 80 struct tm *gmtime_r(const time_t *timep, struct tm *result) 81 { 82 struct tm *p = gmtime(timep); 83 memset(result, 0, sizeof(*result)); 84 if (p) { 85 *result = *p; 86 p = result; 87 } 88 return p; 89 } 90 91 /* FIXME: add proper locking */ 92 struct tm *localtime_r(const time_t *timep, struct tm *result) 93 { 94 struct tm *p = localtime(timep); 95 memset(result, 0, sizeof(*result)); 96 if (p) { 97 *result = *p; 98 p = result; 99 } 100 return p; 101 } 102 #endif /* _POSIX_THREAD_SAFE_FUNCTIONS */ 103 104 static int socket_error(void) 105 { 106 switch (WSAGetLastError()) { 107 case 0: 108 return 0; 109 case WSAEINTR: 110 return EINTR; 111 case WSAEINVAL: 112 return EINVAL; 113 case WSA_INVALID_HANDLE: 114 return EBADF; 115 case WSA_NOT_ENOUGH_MEMORY: 116 return ENOMEM; 117 case WSA_INVALID_PARAMETER: 118 return EINVAL; 119 case WSAENAMETOOLONG: 120 return ENAMETOOLONG; 121 case WSAENOTEMPTY: 122 return ENOTEMPTY; 123 case WSAEWOULDBLOCK: 124 /* not using EWOULDBLOCK as we don't want code to have 125 * to check both EWOULDBLOCK and EAGAIN */ 126 return EAGAIN; 127 case WSAEINPROGRESS: 128 return EINPROGRESS; 129 case WSAEALREADY: 130 return EALREADY; 131 case WSAENOTSOCK: 132 return ENOTSOCK; 133 case WSAEDESTADDRREQ: 134 return EDESTADDRREQ; 135 case WSAEMSGSIZE: 136 return EMSGSIZE; 137 case WSAEPROTOTYPE: 138 return EPROTOTYPE; 139 case WSAENOPROTOOPT: 140 return ENOPROTOOPT; 141 case WSAEPROTONOSUPPORT: 142 return EPROTONOSUPPORT; 143 case WSAEOPNOTSUPP: 144 return EOPNOTSUPP; 145 case WSAEAFNOSUPPORT: 146 return EAFNOSUPPORT; 147 case WSAEADDRINUSE: 148 return EADDRINUSE; 149 case WSAEADDRNOTAVAIL: 150 return EADDRNOTAVAIL; 151 case WSAENETDOWN: 152 return ENETDOWN; 153 case WSAENETUNREACH: 154 return ENETUNREACH; 155 case WSAENETRESET: 156 return ENETRESET; 157 case WSAECONNABORTED: 158 return ECONNABORTED; 159 case WSAECONNRESET: 160 return ECONNRESET; 161 case WSAENOBUFS: 162 return ENOBUFS; 163 case WSAEISCONN: 164 return EISCONN; 165 case WSAENOTCONN: 166 return ENOTCONN; 167 case WSAETIMEDOUT: 168 return ETIMEDOUT; 169 case WSAECONNREFUSED: 170 return ECONNREFUSED; 171 case WSAELOOP: 172 return ELOOP; 173 case WSAEHOSTUNREACH: 174 return EHOSTUNREACH; 175 default: 176 return EIO; 177 } 178 } 179 180 void qemu_socket_set_block(int fd) 181 { 182 unsigned long opt = 0; 183 qemu_socket_unselect(fd, NULL); 184 ioctlsocket(fd, FIONBIO, &opt); 185 } 186 187 int qemu_socket_try_set_nonblock(int fd) 188 { 189 unsigned long opt = 1; 190 if (ioctlsocket(fd, FIONBIO, &opt) != NO_ERROR) { 191 return -socket_error(); 192 } 193 return 0; 194 } 195 196 void qemu_socket_set_nonblock(int fd) 197 { 198 (void)qemu_socket_try_set_nonblock(fd); 199 } 200 201 int socket_set_fast_reuse(int fd) 202 { 203 /* Enabling the reuse of an endpoint that was used by a socket still in 204 * TIME_WAIT state is usually performed by setting SO_REUSEADDR. On Windows 205 * fast reuse is the default and SO_REUSEADDR does strange things. So we 206 * don't have to do anything here. More info can be found at: 207 * http://msdn.microsoft.com/en-us/library/windows/desktop/ms740621.aspx */ 208 return 0; 209 } 210 211 int inet_aton(const char *cp, struct in_addr *ia) 212 { 213 uint32_t addr = inet_addr(cp); 214 if (addr == 0xffffffff) { 215 return 0; 216 } 217 ia->s_addr = addr; 218 return 1; 219 } 220 221 void qemu_set_cloexec(int fd) 222 { 223 } 224 225 int qemu_get_thread_id(void) 226 { 227 return GetCurrentThreadId(); 228 } 229 230 char * 231 qemu_get_local_state_dir(void) 232 { 233 const char * const *data_dirs = g_get_system_data_dirs(); 234 235 g_assert(data_dirs && data_dirs[0]); 236 237 return g_strdup(data_dirs[0]); 238 } 239 240 void qemu_set_tty_echo(int fd, bool echo) 241 { 242 HANDLE handle = (HANDLE)_get_osfhandle(fd); 243 DWORD dwMode = 0; 244 245 if (handle == INVALID_HANDLE_VALUE) { 246 return; 247 } 248 249 GetConsoleMode(handle, &dwMode); 250 251 if (echo) { 252 SetConsoleMode(handle, dwMode | ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT); 253 } else { 254 SetConsoleMode(handle, 255 dwMode & ~(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT)); 256 } 257 } 258 259 int getpagesize(void) 260 { 261 SYSTEM_INFO system_info; 262 263 GetSystemInfo(&system_info); 264 return system_info.dwPageSize; 265 } 266 267 void qemu_prealloc_mem(int fd, char *area, size_t sz, int max_threads, 268 ThreadContext *tc, Error **errp) 269 { 270 int i; 271 size_t pagesize = qemu_real_host_page_size(); 272 273 sz = (sz + pagesize - 1) & -pagesize; 274 for (i = 0; i < sz / pagesize; i++) { 275 memset(area + pagesize * i, 0, 1); 276 } 277 } 278 279 char *qemu_get_pid_name(pid_t pid) 280 { 281 /* XXX Implement me */ 282 abort(); 283 } 284 285 286 bool qemu_socket_select(int sockfd, WSAEVENT hEventObject, 287 long lNetworkEvents, Error **errp) 288 { 289 SOCKET s = _get_osfhandle(sockfd); 290 291 if (errp == NULL) { 292 errp = &error_warn; 293 } 294 295 if (s == INVALID_SOCKET) { 296 error_setg(errp, "invalid socket fd=%d", sockfd); 297 return false; 298 } 299 300 if (WSAEventSelect(s, hEventObject, lNetworkEvents) != 0) { 301 error_setg_win32(errp, WSAGetLastError(), "failed to WSAEventSelect()"); 302 return false; 303 } 304 305 return true; 306 } 307 308 bool qemu_socket_unselect(int sockfd, Error **errp) 309 { 310 return qemu_socket_select(sockfd, NULL, 0, errp); 311 } 312 313 int qemu_socketpair(int domain, int type, int protocol, int sv[2]) 314 { 315 struct sockaddr_un addr = { 316 0, 317 }; 318 socklen_t socklen; 319 int listener = -1; 320 int client = -1; 321 int server = -1; 322 g_autofree char *path = NULL; 323 int tmpfd; 324 u_long arg; 325 int ret = -1; 326 327 g_return_val_if_fail(sv != NULL, -1); 328 329 addr.sun_family = AF_UNIX; 330 socklen = sizeof(addr); 331 332 tmpfd = g_file_open_tmp(NULL, &path, NULL); 333 if (tmpfd == -1 || !path) { 334 errno = EACCES; 335 goto out; 336 } 337 338 close(tmpfd); 339 340 if (strlen(path) >= sizeof(addr.sun_path)) { 341 errno = EINVAL; 342 goto out; 343 } 344 345 strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1); 346 347 listener = socket(domain, type, protocol); 348 if (listener == -1) { 349 goto out; 350 } 351 352 if (DeleteFile(path) == 0 && GetLastError() != ERROR_FILE_NOT_FOUND) { 353 errno = EACCES; 354 goto out; 355 } 356 g_clear_pointer(&path, g_free); 357 358 if (bind(listener, (struct sockaddr *)&addr, socklen) == -1) { 359 goto out; 360 } 361 362 if (listen(listener, 1) == -1) { 363 goto out; 364 } 365 366 client = socket(domain, type, protocol); 367 if (client == -1) { 368 goto out; 369 } 370 371 arg = 1; 372 if (ioctlsocket(client, FIONBIO, &arg) != NO_ERROR) { 373 goto out; 374 } 375 376 if (connect(client, (struct sockaddr *)&addr, socklen) == -1 && 377 WSAGetLastError() != WSAEWOULDBLOCK) { 378 goto out; 379 } 380 381 server = accept(listener, NULL, NULL); 382 if (server == -1) { 383 goto out; 384 } 385 386 arg = 0; 387 if (ioctlsocket(client, FIONBIO, &arg) != NO_ERROR) { 388 goto out; 389 } 390 391 arg = 0; 392 if (ioctlsocket(client, SIO_AF_UNIX_GETPEERPID, &arg) != NO_ERROR) { 393 goto out; 394 } 395 396 if (arg != GetCurrentProcessId()) { 397 errno = EPERM; 398 goto out; 399 } 400 401 sv[0] = server; 402 server = -1; 403 sv[1] = client; 404 client = -1; 405 ret = 0; 406 407 out: 408 if (listener != -1) { 409 close(listener); 410 } 411 if (client != -1) { 412 close(client); 413 } 414 if (server != -1) { 415 close(server); 416 } 417 if (path) { 418 DeleteFile(path); 419 } 420 return ret; 421 } 422 423 #undef connect 424 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr, 425 socklen_t addrlen) 426 { 427 int ret; 428 SOCKET s = _get_osfhandle(sockfd); 429 430 if (s == INVALID_SOCKET) { 431 return -1; 432 } 433 434 ret = connect(s, addr, addrlen); 435 if (ret < 0) { 436 if (WSAGetLastError() == WSAEWOULDBLOCK) { 437 errno = EINPROGRESS; 438 } else { 439 errno = socket_error(); 440 } 441 } 442 return ret; 443 } 444 445 446 #undef listen 447 int qemu_listen_wrap(int sockfd, int backlog) 448 { 449 int ret; 450 SOCKET s = _get_osfhandle(sockfd); 451 452 if (s == INVALID_SOCKET) { 453 return -1; 454 } 455 456 ret = listen(s, backlog); 457 if (ret < 0) { 458 errno = socket_error(); 459 } 460 return ret; 461 } 462 463 464 #undef bind 465 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr, 466 socklen_t addrlen) 467 { 468 int ret; 469 SOCKET s = _get_osfhandle(sockfd); 470 471 if (s == INVALID_SOCKET) { 472 return -1; 473 } 474 475 ret = bind(s, addr, addrlen); 476 if (ret < 0) { 477 errno = socket_error(); 478 } 479 return ret; 480 } 481 482 QEMU_USED EXCEPTION_DISPOSITION 483 win32_close_exception_handler(struct _EXCEPTION_RECORD *exception_record, 484 void *registration, struct _CONTEXT *context, 485 void *dispatcher) 486 { 487 return EXCEPTION_EXECUTE_HANDLER; 488 } 489 490 #undef close 491 int qemu_close_socket_osfhandle(int fd) 492 { 493 SOCKET s = _get_osfhandle(fd); 494 DWORD flags = 0; 495 496 /* 497 * If we were to just call _close on the descriptor, it would close the 498 * HANDLE, but it wouldn't free any of the resources associated to the 499 * SOCKET, and we can't call _close after calling closesocket, because 500 * closesocket has already closed the HANDLE, and _close would attempt to 501 * close the HANDLE again, resulting in a double free. We can however 502 * protect the HANDLE from actually being closed long enough to close the 503 * file descriptor, then close the socket itself. 504 */ 505 if (!GetHandleInformation((HANDLE)s, &flags)) { 506 errno = EACCES; 507 return -1; 508 } 509 510 if (!SetHandleInformation((HANDLE)s, HANDLE_FLAG_PROTECT_FROM_CLOSE, HANDLE_FLAG_PROTECT_FROM_CLOSE)) { 511 errno = EACCES; 512 return -1; 513 } 514 515 __try1(win32_close_exception_handler) { 516 /* 517 * close() returns EBADF since we PROTECT_FROM_CLOSE the underlying 518 * handle, but the FD is actually freed 519 */ 520 if (close(fd) < 0 && errno != EBADF) { 521 return -1; 522 } 523 } 524 __except1 { 525 } 526 527 if (!SetHandleInformation((HANDLE)s, flags, flags)) { 528 errno = EACCES; 529 return -1; 530 } 531 532 return 0; 533 } 534 535 int qemu_close_wrap(int fd) 536 { 537 SOCKET s = INVALID_SOCKET; 538 int ret = -1; 539 540 if (!fd_is_socket(fd)) { 541 return close(fd); 542 } 543 544 s = _get_osfhandle(fd); 545 qemu_close_socket_osfhandle(fd); 546 547 ret = closesocket(s); 548 if (ret < 0) { 549 errno = socket_error(); 550 } 551 552 return ret; 553 } 554 555 556 #undef socket 557 int qemu_socket_wrap(int domain, int type, int protocol) 558 { 559 SOCKET s; 560 int fd; 561 562 s = socket(domain, type, protocol); 563 if (s == -1) { 564 errno = socket_error(); 565 return -1; 566 } 567 568 fd = _open_osfhandle(s, _O_BINARY); 569 if (fd < 0) { 570 closesocket(s); 571 /* _open_osfhandle may not set errno, and closesocket() may override it */ 572 errno = ENOMEM; 573 } 574 575 return fd; 576 } 577 578 579 #undef accept 580 int qemu_accept_wrap(int sockfd, struct sockaddr *addr, 581 socklen_t *addrlen) 582 { 583 int fd; 584 SOCKET s = _get_osfhandle(sockfd); 585 586 if (s == INVALID_SOCKET) { 587 return -1; 588 } 589 590 s = accept(s, addr, addrlen); 591 if (s == -1) { 592 errno = socket_error(); 593 return -1; 594 } 595 596 fd = _open_osfhandle(s, _O_BINARY); 597 if (fd < 0) { 598 closesocket(s); 599 /* _open_osfhandle may not set errno, and closesocket() may override it */ 600 errno = ENOMEM; 601 } 602 603 return fd; 604 } 605 606 607 #undef shutdown 608 int qemu_shutdown_wrap(int sockfd, int how) 609 { 610 int ret; 611 SOCKET s = _get_osfhandle(sockfd); 612 613 if (s == INVALID_SOCKET) { 614 return -1; 615 } 616 617 ret = shutdown(s, how); 618 if (ret < 0) { 619 errno = socket_error(); 620 } 621 return ret; 622 } 623 624 625 #undef ioctlsocket 626 int qemu_ioctlsocket_wrap(int fd, int req, void *val) 627 { 628 int ret; 629 SOCKET s = _get_osfhandle(fd); 630 631 if (s == INVALID_SOCKET) { 632 return -1; 633 } 634 635 ret = ioctlsocket(s, req, val); 636 if (ret < 0) { 637 errno = socket_error(); 638 } 639 return ret; 640 } 641 642 643 #undef getsockopt 644 int qemu_getsockopt_wrap(int sockfd, int level, int optname, 645 void *optval, socklen_t *optlen) 646 { 647 int ret; 648 SOCKET s = _get_osfhandle(sockfd); 649 650 if (s == INVALID_SOCKET) { 651 return -1; 652 } 653 654 ret = getsockopt(s, level, optname, optval, optlen); 655 if (ret < 0) { 656 errno = socket_error(); 657 } 658 return ret; 659 } 660 661 662 #undef setsockopt 663 int qemu_setsockopt_wrap(int sockfd, int level, int optname, 664 const void *optval, socklen_t optlen) 665 { 666 int ret; 667 SOCKET s = _get_osfhandle(sockfd); 668 669 if (s == INVALID_SOCKET) { 670 return -1; 671 } 672 673 ret = setsockopt(s, level, optname, optval, optlen); 674 if (ret < 0) { 675 errno = socket_error(); 676 } 677 return ret; 678 } 679 680 681 #undef getpeername 682 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr, 683 socklen_t *addrlen) 684 { 685 int ret; 686 SOCKET s = _get_osfhandle(sockfd); 687 688 if (s == INVALID_SOCKET) { 689 return -1; 690 } 691 692 ret = getpeername(s, addr, addrlen); 693 if (ret < 0) { 694 errno = socket_error(); 695 } 696 return ret; 697 } 698 699 700 #undef getsockname 701 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr, 702 socklen_t *addrlen) 703 { 704 int ret; 705 SOCKET s = _get_osfhandle(sockfd); 706 707 if (s == INVALID_SOCKET) { 708 return -1; 709 } 710 711 ret = getsockname(s, addr, addrlen); 712 if (ret < 0) { 713 errno = socket_error(); 714 } 715 return ret; 716 } 717 718 719 #undef send 720 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags) 721 { 722 int ret; 723 SOCKET s = _get_osfhandle(sockfd); 724 725 if (s == INVALID_SOCKET) { 726 return -1; 727 } 728 729 ret = send(s, buf, len, flags); 730 if (ret < 0) { 731 errno = socket_error(); 732 } 733 return ret; 734 } 735 736 737 #undef sendto 738 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags, 739 const struct sockaddr *addr, socklen_t addrlen) 740 { 741 int ret; 742 SOCKET s = _get_osfhandle(sockfd); 743 744 if (s == INVALID_SOCKET) { 745 return -1; 746 } 747 748 ret = sendto(s, buf, len, flags, addr, addrlen); 749 if (ret < 0) { 750 errno = socket_error(); 751 } 752 return ret; 753 } 754 755 756 #undef recv 757 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags) 758 { 759 int ret; 760 SOCKET s = _get_osfhandle(sockfd); 761 762 if (s == INVALID_SOCKET) { 763 return -1; 764 } 765 766 ret = recv(s, buf, len, flags); 767 if (ret < 0) { 768 errno = socket_error(); 769 } 770 return ret; 771 } 772 773 774 #undef recvfrom 775 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags, 776 struct sockaddr *addr, socklen_t *addrlen) 777 { 778 int ret; 779 SOCKET s = _get_osfhandle(sockfd); 780 781 if (s == INVALID_SOCKET) { 782 return -1; 783 } 784 785 ret = recvfrom(s, buf, len, flags, addr, addrlen); 786 if (ret < 0) { 787 errno = socket_error(); 788 } 789 return ret; 790 } 791 792 bool qemu_write_pidfile(const char *filename, Error **errp) 793 { 794 char buffer[128]; 795 int len; 796 HANDLE file; 797 OVERLAPPED overlap; 798 BOOL ret; 799 memset(&overlap, 0, sizeof(overlap)); 800 801 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, 802 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 803 804 if (file == INVALID_HANDLE_VALUE) { 805 error_setg(errp, "Failed to create PID file"); 806 return false; 807 } 808 len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid()); 809 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len, 810 NULL, &overlap); 811 CloseHandle(file); 812 if (ret == 0) { 813 error_setg(errp, "Failed to write PID file"); 814 return false; 815 } 816 return true; 817 } 818 819 size_t qemu_get_host_physmem(void) 820 { 821 MEMORYSTATUSEX statex; 822 statex.dwLength = sizeof(statex); 823 824 if (GlobalMemoryStatusEx(&statex)) { 825 return statex.ullTotalPhys; 826 } 827 return 0; 828 } 829 830 int qemu_msync(void *addr, size_t length, int fd) 831 { 832 /** 833 * Perform the sync based on the file descriptor 834 * The sync range will most probably be wider than the one 835 * requested - but it will still get the job done 836 */ 837 return qemu_fdatasync(fd); 838 } 839 840 void *qemu_win32_map_alloc(size_t size, HANDLE *h, Error **errp) 841 { 842 void *bits; 843 844 trace_win32_map_alloc(size); 845 846 *h = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 847 size, NULL); 848 if (*h == NULL) { 849 error_setg_win32(errp, GetLastError(), "Failed to CreateFileMapping"); 850 return NULL; 851 } 852 853 bits = MapViewOfFile(*h, FILE_MAP_ALL_ACCESS, 0, 0, size); 854 if (bits == NULL) { 855 error_setg_win32(errp, GetLastError(), "Failed to MapViewOfFile"); 856 CloseHandle(*h); 857 return NULL; 858 } 859 860 return bits; 861 } 862 863 void qemu_win32_map_free(void *ptr, HANDLE h, Error **errp) 864 { 865 trace_win32_map_free(ptr, h); 866 867 if (UnmapViewOfFile(ptr) == 0) { 868 error_setg_win32(errp, GetLastError(), "Failed to UnmapViewOfFile"); 869 } 870 CloseHandle(h); 871 } 872