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 bool 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 return true; 279 } 280 281 char *qemu_get_pid_name(pid_t pid) 282 { 283 /* XXX Implement me */ 284 abort(); 285 } 286 287 288 bool qemu_socket_select(int sockfd, WSAEVENT hEventObject, 289 long lNetworkEvents, Error **errp) 290 { 291 SOCKET s = _get_osfhandle(sockfd); 292 293 if (errp == NULL) { 294 errp = &error_warn; 295 } 296 297 if (s == INVALID_SOCKET) { 298 error_setg(errp, "invalid socket fd=%d", sockfd); 299 return false; 300 } 301 302 if (WSAEventSelect(s, hEventObject, lNetworkEvents) != 0) { 303 error_setg_win32(errp, WSAGetLastError(), "failed to WSAEventSelect()"); 304 return false; 305 } 306 307 return true; 308 } 309 310 bool qemu_socket_unselect(int sockfd, Error **errp) 311 { 312 return qemu_socket_select(sockfd, NULL, 0, errp); 313 } 314 315 int qemu_socketpair(int domain, int type, int protocol, int sv[2]) 316 { 317 struct sockaddr_un addr = { 318 0, 319 }; 320 socklen_t socklen; 321 int listener = -1; 322 int client = -1; 323 int server = -1; 324 g_autofree char *path = NULL; 325 int tmpfd; 326 u_long arg; 327 int ret = -1; 328 329 g_return_val_if_fail(sv != NULL, -1); 330 331 addr.sun_family = AF_UNIX; 332 socklen = sizeof(addr); 333 334 tmpfd = g_file_open_tmp(NULL, &path, NULL); 335 if (tmpfd == -1 || !path) { 336 errno = EACCES; 337 goto out; 338 } 339 340 close(tmpfd); 341 342 if (strlen(path) >= sizeof(addr.sun_path)) { 343 errno = EINVAL; 344 goto out; 345 } 346 347 strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1); 348 349 listener = socket(domain, type, protocol); 350 if (listener == -1) { 351 goto out; 352 } 353 354 if (DeleteFile(path) == 0 && GetLastError() != ERROR_FILE_NOT_FOUND) { 355 errno = EACCES; 356 goto out; 357 } 358 g_clear_pointer(&path, g_free); 359 360 if (bind(listener, (struct sockaddr *)&addr, socklen) == -1) { 361 goto out; 362 } 363 364 if (listen(listener, 1) == -1) { 365 goto out; 366 } 367 368 client = socket(domain, type, protocol); 369 if (client == -1) { 370 goto out; 371 } 372 373 arg = 1; 374 if (ioctlsocket(client, FIONBIO, &arg) != NO_ERROR) { 375 goto out; 376 } 377 378 if (connect(client, (struct sockaddr *)&addr, socklen) == -1 && 379 WSAGetLastError() != WSAEWOULDBLOCK) { 380 goto out; 381 } 382 383 server = accept(listener, NULL, NULL); 384 if (server == -1) { 385 goto out; 386 } 387 388 arg = 0; 389 if (ioctlsocket(client, FIONBIO, &arg) != NO_ERROR) { 390 goto out; 391 } 392 393 arg = 0; 394 if (ioctlsocket(client, SIO_AF_UNIX_GETPEERPID, &arg) != NO_ERROR) { 395 goto out; 396 } 397 398 if (arg != GetCurrentProcessId()) { 399 errno = EPERM; 400 goto out; 401 } 402 403 sv[0] = server; 404 server = -1; 405 sv[1] = client; 406 client = -1; 407 ret = 0; 408 409 out: 410 if (listener != -1) { 411 close(listener); 412 } 413 if (client != -1) { 414 close(client); 415 } 416 if (server != -1) { 417 close(server); 418 } 419 if (path) { 420 DeleteFile(path); 421 } 422 return ret; 423 } 424 425 #undef connect 426 int qemu_connect_wrap(int sockfd, const struct sockaddr *addr, 427 socklen_t addrlen) 428 { 429 int ret; 430 SOCKET s = _get_osfhandle(sockfd); 431 432 if (s == INVALID_SOCKET) { 433 return -1; 434 } 435 436 ret = connect(s, addr, addrlen); 437 if (ret < 0) { 438 if (WSAGetLastError() == WSAEWOULDBLOCK) { 439 errno = EINPROGRESS; 440 } else { 441 errno = socket_error(); 442 } 443 } 444 return ret; 445 } 446 447 448 #undef listen 449 int qemu_listen_wrap(int sockfd, int backlog) 450 { 451 int ret; 452 SOCKET s = _get_osfhandle(sockfd); 453 454 if (s == INVALID_SOCKET) { 455 return -1; 456 } 457 458 ret = listen(s, backlog); 459 if (ret < 0) { 460 errno = socket_error(); 461 } 462 return ret; 463 } 464 465 466 #undef bind 467 int qemu_bind_wrap(int sockfd, const struct sockaddr *addr, 468 socklen_t addrlen) 469 { 470 int ret; 471 SOCKET s = _get_osfhandle(sockfd); 472 473 if (s == INVALID_SOCKET) { 474 return -1; 475 } 476 477 ret = bind(s, addr, addrlen); 478 if (ret < 0) { 479 errno = socket_error(); 480 } 481 return ret; 482 } 483 484 QEMU_USED EXCEPTION_DISPOSITION 485 win32_close_exception_handler(struct _EXCEPTION_RECORD *exception_record, 486 void *registration, struct _CONTEXT *context, 487 void *dispatcher) 488 { 489 return EXCEPTION_EXECUTE_HANDLER; 490 } 491 492 #undef close 493 int qemu_close_socket_osfhandle(int fd) 494 { 495 SOCKET s = _get_osfhandle(fd); 496 DWORD flags = 0; 497 498 /* 499 * If we were to just call _close on the descriptor, it would close the 500 * HANDLE, but it wouldn't free any of the resources associated to the 501 * SOCKET, and we can't call _close after calling closesocket, because 502 * closesocket has already closed the HANDLE, and _close would attempt to 503 * close the HANDLE again, resulting in a double free. We can however 504 * protect the HANDLE from actually being closed long enough to close the 505 * file descriptor, then close the socket itself. 506 */ 507 if (!GetHandleInformation((HANDLE)s, &flags)) { 508 errno = EACCES; 509 return -1; 510 } 511 512 if (!SetHandleInformation((HANDLE)s, HANDLE_FLAG_PROTECT_FROM_CLOSE, HANDLE_FLAG_PROTECT_FROM_CLOSE)) { 513 errno = EACCES; 514 return -1; 515 } 516 517 __try1(win32_close_exception_handler) { 518 /* 519 * close() returns EBADF since we PROTECT_FROM_CLOSE the underlying 520 * handle, but the FD is actually freed 521 */ 522 if (close(fd) < 0 && errno != EBADF) { 523 return -1; 524 } 525 } 526 __except1 { 527 } 528 529 if (!SetHandleInformation((HANDLE)s, flags, flags)) { 530 errno = EACCES; 531 return -1; 532 } 533 534 return 0; 535 } 536 537 int qemu_close_wrap(int fd) 538 { 539 SOCKET s = INVALID_SOCKET; 540 int ret = -1; 541 542 if (!fd_is_socket(fd)) { 543 return close(fd); 544 } 545 546 s = _get_osfhandle(fd); 547 qemu_close_socket_osfhandle(fd); 548 549 ret = closesocket(s); 550 if (ret < 0) { 551 errno = socket_error(); 552 } 553 554 return ret; 555 } 556 557 558 #undef socket 559 int qemu_socket_wrap(int domain, int type, int protocol) 560 { 561 SOCKET s; 562 int fd; 563 564 s = socket(domain, type, protocol); 565 if (s == -1) { 566 errno = socket_error(); 567 return -1; 568 } 569 570 fd = _open_osfhandle(s, _O_BINARY); 571 if (fd < 0) { 572 closesocket(s); 573 /* _open_osfhandle may not set errno, and closesocket() may override it */ 574 errno = ENOMEM; 575 } 576 577 return fd; 578 } 579 580 581 #undef accept 582 int qemu_accept_wrap(int sockfd, struct sockaddr *addr, 583 socklen_t *addrlen) 584 { 585 int fd; 586 SOCKET s = _get_osfhandle(sockfd); 587 588 if (s == INVALID_SOCKET) { 589 return -1; 590 } 591 592 s = accept(s, addr, addrlen); 593 if (s == -1) { 594 errno = socket_error(); 595 return -1; 596 } 597 598 fd = _open_osfhandle(s, _O_BINARY); 599 if (fd < 0) { 600 closesocket(s); 601 /* _open_osfhandle may not set errno, and closesocket() may override it */ 602 errno = ENOMEM; 603 } 604 605 return fd; 606 } 607 608 609 #undef shutdown 610 int qemu_shutdown_wrap(int sockfd, int how) 611 { 612 int ret; 613 SOCKET s = _get_osfhandle(sockfd); 614 615 if (s == INVALID_SOCKET) { 616 return -1; 617 } 618 619 ret = shutdown(s, how); 620 if (ret < 0) { 621 errno = socket_error(); 622 } 623 return ret; 624 } 625 626 627 #undef ioctlsocket 628 int qemu_ioctlsocket_wrap(int fd, int req, void *val) 629 { 630 int ret; 631 SOCKET s = _get_osfhandle(fd); 632 633 if (s == INVALID_SOCKET) { 634 return -1; 635 } 636 637 ret = ioctlsocket(s, req, val); 638 if (ret < 0) { 639 errno = socket_error(); 640 } 641 return ret; 642 } 643 644 645 #undef getsockopt 646 int qemu_getsockopt_wrap(int sockfd, int level, int optname, 647 void *optval, socklen_t *optlen) 648 { 649 int ret; 650 SOCKET s = _get_osfhandle(sockfd); 651 652 if (s == INVALID_SOCKET) { 653 return -1; 654 } 655 656 ret = getsockopt(s, level, optname, optval, optlen); 657 if (ret < 0) { 658 errno = socket_error(); 659 } 660 return ret; 661 } 662 663 664 #undef setsockopt 665 int qemu_setsockopt_wrap(int sockfd, int level, int optname, 666 const void *optval, socklen_t optlen) 667 { 668 int ret; 669 SOCKET s = _get_osfhandle(sockfd); 670 671 if (s == INVALID_SOCKET) { 672 return -1; 673 } 674 675 ret = setsockopt(s, level, optname, optval, optlen); 676 if (ret < 0) { 677 errno = socket_error(); 678 } 679 return ret; 680 } 681 682 683 #undef getpeername 684 int qemu_getpeername_wrap(int sockfd, struct sockaddr *addr, 685 socklen_t *addrlen) 686 { 687 int ret; 688 SOCKET s = _get_osfhandle(sockfd); 689 690 if (s == INVALID_SOCKET) { 691 return -1; 692 } 693 694 ret = getpeername(s, addr, addrlen); 695 if (ret < 0) { 696 errno = socket_error(); 697 } 698 return ret; 699 } 700 701 702 #undef getsockname 703 int qemu_getsockname_wrap(int sockfd, struct sockaddr *addr, 704 socklen_t *addrlen) 705 { 706 int ret; 707 SOCKET s = _get_osfhandle(sockfd); 708 709 if (s == INVALID_SOCKET) { 710 return -1; 711 } 712 713 ret = getsockname(s, addr, addrlen); 714 if (ret < 0) { 715 errno = socket_error(); 716 } 717 return ret; 718 } 719 720 721 #undef send 722 ssize_t qemu_send_wrap(int sockfd, const void *buf, size_t len, int flags) 723 { 724 int ret; 725 SOCKET s = _get_osfhandle(sockfd); 726 727 if (s == INVALID_SOCKET) { 728 return -1; 729 } 730 731 ret = send(s, buf, len, flags); 732 if (ret < 0) { 733 errno = socket_error(); 734 } 735 return ret; 736 } 737 738 739 #undef sendto 740 ssize_t qemu_sendto_wrap(int sockfd, const void *buf, size_t len, int flags, 741 const struct sockaddr *addr, socklen_t addrlen) 742 { 743 int ret; 744 SOCKET s = _get_osfhandle(sockfd); 745 746 if (s == INVALID_SOCKET) { 747 return -1; 748 } 749 750 ret = sendto(s, buf, len, flags, addr, addrlen); 751 if (ret < 0) { 752 errno = socket_error(); 753 } 754 return ret; 755 } 756 757 758 #undef recv 759 ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags) 760 { 761 int ret; 762 SOCKET s = _get_osfhandle(sockfd); 763 764 if (s == INVALID_SOCKET) { 765 return -1; 766 } 767 768 ret = recv(s, buf, len, flags); 769 if (ret < 0) { 770 errno = socket_error(); 771 } 772 return ret; 773 } 774 775 776 #undef recvfrom 777 ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags, 778 struct sockaddr *addr, socklen_t *addrlen) 779 { 780 int ret; 781 SOCKET s = _get_osfhandle(sockfd); 782 783 if (s == INVALID_SOCKET) { 784 return -1; 785 } 786 787 ret = recvfrom(s, buf, len, flags, addr, addrlen); 788 if (ret < 0) { 789 errno = socket_error(); 790 } 791 return ret; 792 } 793 794 bool qemu_write_pidfile(const char *filename, Error **errp) 795 { 796 char buffer[128]; 797 int len; 798 HANDLE file; 799 OVERLAPPED overlap; 800 BOOL ret; 801 memset(&overlap, 0, sizeof(overlap)); 802 803 file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, 804 OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); 805 806 if (file == INVALID_HANDLE_VALUE) { 807 error_setg(errp, "Failed to create PID file"); 808 return false; 809 } 810 len = snprintf(buffer, sizeof(buffer), FMT_pid "\n", (pid_t)getpid()); 811 ret = WriteFile(file, (LPCVOID)buffer, (DWORD)len, 812 NULL, &overlap); 813 CloseHandle(file); 814 if (ret == 0) { 815 error_setg(errp, "Failed to write PID file"); 816 return false; 817 } 818 return true; 819 } 820 821 size_t qemu_get_host_physmem(void) 822 { 823 MEMORYSTATUSEX statex; 824 statex.dwLength = sizeof(statex); 825 826 if (GlobalMemoryStatusEx(&statex)) { 827 return statex.ullTotalPhys; 828 } 829 return 0; 830 } 831 832 int qemu_msync(void *addr, size_t length, int fd) 833 { 834 /** 835 * Perform the sync based on the file descriptor 836 * The sync range will most probably be wider than the one 837 * requested - but it will still get the job done 838 */ 839 return qemu_fdatasync(fd); 840 } 841 842 void *qemu_win32_map_alloc(size_t size, HANDLE *h, Error **errp) 843 { 844 void *bits; 845 846 trace_win32_map_alloc(size); 847 848 *h = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 849 size, NULL); 850 if (*h == NULL) { 851 error_setg_win32(errp, GetLastError(), "Failed to CreateFileMapping"); 852 return NULL; 853 } 854 855 bits = MapViewOfFile(*h, FILE_MAP_ALL_ACCESS, 0, 0, size); 856 if (bits == NULL) { 857 error_setg_win32(errp, GetLastError(), "Failed to MapViewOfFile"); 858 CloseHandle(*h); 859 return NULL; 860 } 861 862 return bits; 863 } 864 865 void qemu_win32_map_free(void *ptr, HANDLE h, Error **errp) 866 { 867 trace_win32_map_free(ptr, h); 868 869 if (UnmapViewOfFile(ptr) == 0) { 870 error_setg_win32(errp, GetLastError(), "Failed to UnmapViewOfFile"); 871 } 872 CloseHandle(h); 873 } 874