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GeezerVison is showing github.com — MemoryModule/MemoryModule.c at master · jack416/MemoryModule Expand file tree/ Copy pathMemoryModule.cMore file actions 888 lines (777 loc) · 29 KB / Copy pathMemoryModule.cFile metadata and controls888 lines (777 loc) · 29 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 /* * Memory DLL loading code * Version 0.0.4 * * Copyright (c) 2004-2015 by Joachim Bauch / [email protected] * http://www.joachim-bauch.de * * The contents of this file are subject to the Mozilla Public License Version * 2.0 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is MemoryModule.c * * The Initial Developer of the Original Code is Joachim Bauch. * * Portions created by Joachim Bauch are Copyright (C) 2004-2015 * Joachim Bauch. All Rights Reserved. * */ #ifndef __GNUC__ // disable warnings about pointer <-> DWORD conversions #pragma warning( disable : 4311 4312 ) #endif #include <windows.h> #include <winnt.h> #include <stddef.h> #include <tchar.h> #ifdef DEBUG_OUTPUT #include <stdio.h> #endif #ifndef IMAGE_SIZEOF_BASE_RELOCATION // Vista SDKs no longer define IMAGE_SIZEOF_BASE_RELOCATION!? #define IMAGE_SIZEOF_BASE_RELOCATION (sizeof(IMAGE_BASE_RELOCATION)) #endif #include "MemoryModule.h" typedef BOOL (WINAPI *DllEntryProc)(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved); typedef int (WINAPI *ExeEntryProc)(void); typedef struct { PIMAGE_NT_HEADERS headers; unsigned char *codeBase; HCUSTOMMODULE *modules; int numModules; BOOL initialized; BOOL isDLL; BOOL isRelocated; CustomLoadLibraryFunc loadLibrary; CustomGetProcAddressFunc getProcAddress; CustomFreeLibraryFunc freeLibrary; void *userdata; ExeEntryProc exeEntry; DWORD pageSize; } MEMORYMODULE, *PMEMORYMODULE; typedef struct { LPVOID address; LPVOID alignedAddress; DWORD size; DWORD characteristics; BOOL last; } SECTIONFINALIZEDATA, *PSECTIONFINALIZEDATA; #define GET_HEADER_DICTIONARY(module, idx) &(module)->headers->OptionalHeader.DataDirectory[idx] #define ALIGN_DOWN(address, alignment) (LPVOID)((uintptr_t)(address) & ~((alignment) - 1)) #ifdef DEBUG_OUTPUT static void OutputLastError(const char *msg) { LPVOID tmp; char *tmpmsg; FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&tmp, 0, NULL); tmpmsg = (char *)LocalAlloc(LPTR, strlen(msg) + strlen(tmp) + 3); sprintf(tmpmsg, "%s: %s", msg, tmp); OutputDebugString(tmpmsg); LocalFree(tmpmsg); LocalFree(tmp); } #endif static BOOL CopySections(const unsigned char *data, PIMAGE_NT_HEADERS old_headers, PMEMORYMODULE module) { int i, size; unsigned char *codeBase = module->codeBase; unsigned char *dest; PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers); for (i=0; i<module->headers->FileHeader.NumberOfSections; i++, section++) { if (section->SizeOfRawData == 0) { // section doesn't contain data in the dll itself, but may define // uninitialized data size = old_headers->OptionalHeader.SectionAlignment; if (size > 0) { dest = (unsigned char *)VirtualAlloc(codeBase + section->VirtualAddress, size, MEM_COMMIT, PAGE_READWRITE); if (dest == NULL) { return FALSE; } // Always use position from file to support alignments smaller // than page size. dest = codeBase + section->VirtualAddress; section->Misc.PhysicalAddress = (DWORD) (uintptr_t) dest; memset(dest, 0, size); } // section is empty continue; } // commit memory block and copy data from dll dest = (unsigned char *)VirtualAlloc(codeBase + section->VirtualAddress, section->SizeOfRawData, MEM_COMMIT, PAGE_READWRITE); if (dest == NULL) { return FALSE; } // Always use position from file to support alignments smaller // than page size. dest = codeBase + section->VirtualAddress; memcpy(dest, data + section->PointerToRawData, section->SizeOfRawData); section->Misc.PhysicalAddress = (DWORD) (uintptr_t) dest; } return TRUE; } // Protection flags for memory pages (Executable, Readable, Writeable) static int ProtectionFlags[2][2][2] = { { // not executable {PAGE_NOACCESS, PAGE_WRITECOPY}, {PAGE_READONLY, PAGE_READWRITE}, }, { // executable {PAGE_EXECUTE, PAGE_EXECUTE_WRITECOPY}, {PAGE_EXECUTE_READ, PAGE_EXECUTE_READWRITE}, }, }; static DWORD GetRealSectionSize(PMEMORYMODULE module, PIMAGE_SECTION_HEADER section) { DWORD size = section->SizeOfRawData; if (size == 0) { if (section->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) { size = module->headers->OptionalHeader.SizeOfInitializedData; } else if (section->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) { size = module->headers->OptionalHeader.SizeOfUninitializedData; } } return size; } static BOOL FinalizeSection(PMEMORYMODULE module, PSECTIONFINALIZEDATA sectionData) { DWORD protect, oldProtect; BOOL executable; BOOL readable; BOOL writeable; if (sectionData->size == 0) { return TRUE; } if (sectionData->characteristics & IMAGE_SCN_MEM_DISCARDABLE) { // section is not needed any more and can safely be freed if (sectionData->address == sectionData->alignedAddress && (sectionData->last || module->headers->OptionalHeader.SectionAlignment == module->pageSize || (sectionData->size % module->pageSize) == 0) ) { // Only allowed to decommit whole pages VirtualFree(sectionData->address, sectionData->size, MEM_DECOMMIT); } return TRUE; } // determine protection flags based on characteristics executable = (sectionData->characteristics & IMAGE_SCN_MEM_EXECUTE) != 0; readable = (sectionData->characteristics & IMAGE_SCN_MEM_READ) != 0; writeable = (sectionData->characteristics & IMAGE_SCN_MEM_WRITE) != 0; protect = ProtectionFlags[executable][readable][writeable]; if (sectionData->characteristics & IMAGE_SCN_MEM_NOT_CACHED) { protect |= PAGE_NOCACHE; } // change memory access flags if (VirtualProtect(sectionData->address, sectionData->size, protect, &oldProtect) == 0) { #ifdef DEBUG_OUTPUT OutputLastError("Error protecting memory page") #endif return FALSE; } return TRUE; } static BOOL FinalizeSections(PMEMORYMODULE module) { int i; PIMAGE_SECTION_HEADER section = IMAGE_FIRST_SECTION(module->headers); #ifdef _WIN64 uintptr_t imageOffset = (module->headers->OptionalHeader.ImageBase & 0xffffffff00000000); #else #define imageOffset 0 #endif SECTIONFINALIZEDATA sectionData; sectionData.address = (LPVOID)((uintptr_t)section->Misc.PhysicalAddress | imageOffset); sectionData.alignedAddress = ALIGN_DOWN(sectionData.address, module->pageSize); sectionData.size = GetRealSectionSize(module, section); sectionData.characteristics = section->Characteristics; sectionData.last = FALSE; section++; // loop through all sections and change access flags for (i=1; i<module->headers->FileHeader.NumberOfSections; i++, section++) { LPVOID sectionAddress = (LPVOID)((uintptr_t)section->Misc.PhysicalAddress | imageOffset); LPVOID alignedAddress = ALIGN_DOWN(sectionAddress, module->pageSize); DWORD sectionSize = GetRealSectionSize(module, section); // Combine access flags of all sections that share a page // TODO(fancycode): We currently share flags of a trailing large section // with the page of a first small section. This should be optimized. if (sectionData.alignedAddress == alignedAddress || (uintptr_t) sectionData.address + sectionData.size > (uintptr_t) alignedAddress) { // Section shares page with previous if ((section->Characteristics & IMAGE_SCN_MEM_DISCARDABLE) == 0 || (sectionData.characteristics & IMAGE_SCN_MEM_DISCARDABLE) == 0) { sectionData.characteristics = (sectionData.characteristics | section->Characteristics) & ~IMAGE_SCN_MEM_DISCARDABLE; } else { sectionData.characteristics |= section->Characteristics; } sectionData.size = (((uintptr_t)sectionAddress) + sectionSize) - (uintptr_t) sectionData.address; continue; } if (!FinalizeSection(module, §ionData)) { return FALSE; } sectionData.address = sectionAddress; sectionData.alignedAddress = alignedAddress; sectionData.size = sectionSize; sectionData.characteristics = section->Characteristics; } sectionData.last = TRUE; if (!FinalizeSection(module, §ionData)) { return FALSE; } #ifndef _WIN64 #undef imageOffset #endif return TRUE; } static BOOL ExecuteTLS(PMEMORYMODULE module) { unsigned char *codeBase = module->codeBase; PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_TLS); if (directory->VirtualAddress == 0) { return TRUE; } PIMAGE_TLS_DIRECTORY tls = (PIMAGE_TLS_DIRECTORY) (codeBase + directory->VirtualAddress); PIMAGE_TLS_CALLBACK* callback = (PIMAGE_TLS_CALLBACK *) tls->AddressOfCallBacks; if (callback) { while (*callback) { (*callback)((LPVOID) codeBase, DLL_PROCESS_ATTACH, NULL); callback++; } } return TRUE; } static BOOL PerformBaseRelocation(PMEMORYMODULE module, SIZE_T delta) { unsigned char *codeBase = module->codeBase; PIMAGE_BASE_RELOCATION relocation; PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_BASERELOC); if (directory->Size == 0) { return (delta == 0); } relocation = (PIMAGE_BASE_RELOCATION) (codeBase + directory->VirtualAddress); for (; relocation->VirtualAddress > 0; ) { DWORD i; unsigned char *dest = codeBase + relocation->VirtualAddress; unsigned short *relInfo = (unsigned short *)((unsigned char *)relocation + IMAGE_SIZEOF_BASE_RELOCATION); for (i=0; i<((relocation->SizeOfBlock-IMAGE_SIZEOF_BASE_RELOCATION) / 2); i++, relInfo++) { DWORD *patchAddrHL; #ifdef _WIN64 ULONGLONG *patchAddr64; #endif int type, offset; // the upper 4 bits define the type of relocation type = *relInfo >> 12; // the lower 12 bits define the offset offset = *relInfo & 0xfff; switch (type) { case IMAGE_REL_BASED_ABSOLUTE: // skip relocation break; case IMAGE_REL_BASED_HIGHLOW: // change complete 32 bit address patchAddrHL = (DWORD *) (dest + offset); *patchAddrHL += (DWORD) delta; break; #ifdef _WIN64 case IMAGE_REL_BASED_DIR64: patchAddr64 = (ULONGLONG *) (dest + offset); *patchAddr64 += (ULONGLONG) delta; break; #endif default: //printf("Unknown relocation: %d\n", type); break; } } // advance to next relocation block relocation = (PIMAGE_BASE_RELOCATION) (((char *) relocation) + relocation->SizeOfBlock); } return TRUE; } static BOOL BuildImportTable(PMEMORYMODULE module) { unsigned char *codeBase = module->codeBase; PIMAGE_IMPORT_DESCRIPTOR importDesc; BOOL result = TRUE; PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_IMPORT); if (directory->Size == 0) { return TRUE; } importDesc = (PIMAGE_IMPORT_DESCRIPTOR) (codeBase + directory->VirtualAddress); for (; !IsBadReadPtr(importDesc, sizeof(IMAGE_IMPORT_DESCRIPTOR)) && importDesc->Name; importDesc++) { uintptr_t *thunkRef; FARPROC *funcRef; HCUSTOMMODULE *tmp; HCUSTOMMODULE handle = module->loadLibrary((LPCSTR) (codeBase + importDesc->Name), module->userdata); if (handle == NULL) { SetLastError(ERROR_MOD_NOT_FOUND); result = FALSE; break; } tmp = (HCUSTOMMODULE *) realloc(module->modules, (module->numModules+1)*(sizeof(HCUSTOMMODULE))); if (tmp == NULL) { module->freeLibrary(handle, module->userdata); SetLastError(ERROR_OUTOFMEMORY); result = FALSE; break; } module->modules = tmp; module->modules[module->numModules++] = handle; if (importDesc->OriginalFirstThunk) { thunkRef = (uintptr_t *) (codeBase + importDesc->OriginalFirstThunk); funcRef = (FARPROC *) (codeBase + importDesc->FirstThunk); } else { // no hint table thunkRef = (uintptr_t *) (codeBase + importDesc->FirstThunk); funcRef = (FARPROC *) (codeBase + importDesc->FirstThunk); } for (; *thunkRef; thunkRef++, funcRef++) { if (IMAGE_SNAP_BY_ORDINAL(*thunkRef)) { *funcRef = module->getProcAddress(handle, (LPCSTR)IMAGE_ORDINAL(*thunkRef), module->userdata); } else { PIMAGE_IMPORT_BY_NAME thunkData = (PIMAGE_IMPORT_BY_NAME) (codeBase + (*thunkRef)); *funcRef = module->getProcAddress(handle, (LPCSTR)&thunkData->Name, module->userdata); } if (*funcRef == 0) { result = FALSE; break; } } if (!result) { module->freeLibrary(handle, module->userdata); SetLastError(ERROR_PROC_NOT_FOUND); break; } } return result; } static HCUSTOMMODULE _LoadLibrary(LPCSTR filename, void *userdata) { HMODULE result = LoadLibraryA(filename); if (result == NULL) { return NULL; } return (HCUSTOMMODULE) result; } static FARPROC _GetProcAddress(HCUSTOMMODULE module, LPCSTR name, void *userdata) { return (FARPROC) GetProcAddress((HMODULE) module, name); } static void _FreeLibrary(HCUSTOMMODULE module, void *userdata) { FreeLibrary((HMODULE) module); } HMEMORYMODULE MemoryLoadLibrary(const void *data) { return MemoryLoadLibraryEx(data, _LoadLibrary, _GetProcAddress, _FreeLibrary, NULL); } HMEMORYMODULE MemoryLoadLibraryEx(const void *data, CustomLoadLibraryFunc loadLibrary, CustomGetProcAddressFunc getProcAddress, CustomFreeLibraryFunc freeLibrary, void *userdata) { PMEMORYMODULE result; PIMAGE_DOS_HEADER dos_header; PIMAGE_NT_HEADERS old_header; unsigned char *code, *headers; SIZE_T locationDelta; SYSTEM_INFO sysInfo; dos_header = (PIMAGE_DOS_HEADER)data; if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) { SetLastError(ERROR_BAD_EXE_FORMAT); return NULL; } old_header = (PIMAGE_NT_HEADERS)&((const unsigned char *)(data))[dos_header->e_lfanew]; if (old_header->Signature != IMAGE_NT_SIGNATURE) { SetLastError(ERROR_BAD_EXE_FORMAT); return NULL; } #ifdef _WIN64 if (old_header->FileHeader.Machine != IMAGE_FILE_MACHINE_AMD64) { #else if (old_header->FileHeader.Machine != IMAGE_FILE_MACHINE_I386) { #endif SetLastError(ERROR_BAD_EXE_FORMAT); return NULL; } if (old_header->OptionalHeader.SectionAlignment & 1) { // Only support section alignments that are a multiple of 2 SetLastError(ERROR_BAD_EXE_FORMAT); return NULL; } // reserve memory for image of library // XXX: is it correct to commit the complete memory region at once? // calling DllEntry raises an exception if we don't... code = (unsigned char *)VirtualAlloc((LPVOID)(old_header->OptionalHeader.ImageBase), old_header->OptionalHeader.SizeOfImage, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); if (code == NULL) { // try to allocate memory at arbitrary position code = (unsigned char *)VirtualAlloc(NULL, old_header->OptionalHeader.SizeOfImage, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); if (code == NULL) { SetLastError(ERROR_OUTOFMEMORY); return NULL; } } result = (PMEMORYMODULE)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(MEMORYMODULE)); if (result == NULL) { VirtualFree(code, 0, MEM_RELEASE); SetLastError(ERROR_OUTOFMEMORY); return NULL; } result->codeBase = code; result->isDLL = (old_header->FileHeader.Characteristics & IMAGE_FILE_DLL) != 0; result->loadLibrary = loadLibrary; result->getProcAddress = getProcAddress; result->freeLibrary = freeLibrary; result->userdata = userdata; GetNativeSystemInfo(&sysInfo); result->pageSize = sysInfo.dwPageSize; // commit memory for headers headers = (unsigned char *)VirtualAlloc(code, old_header->OptionalHeader.SizeOfHeaders, MEM_COMMIT, PAGE_READWRITE); // copy PE header to code memcpy(headers, dos_header, old_header->OptionalHeader.SizeOfHeaders); result->headers = (PIMAGE_NT_HEADERS)&((const unsigned char *)(headers))[dos_header->e_lfanew]; // update position result->headers->OptionalHeader.ImageBase = (uintptr_t)code; // copy sections from DLL file block to new memory location if (!CopySections((const unsigned char *) data, old_header, result)) { goto error; } // adjust base address of imported data locationDelta = (SIZE_T)(code - old_header->OptionalHeader.ImageBase); if (locationDelta != 0) { result->isRelocated = PerformBaseRelocation(result, locationDelta); } else { result->isRelocated = TRUE; } // load required dlls and adjust function table of imports if (!BuildImportTable(result)) { goto error; } // mark memory pages depending on section headers and release // sections that are marked as "discardable" if (!FinalizeSections(result)) { goto error; } // TLS callbacks are executed BEFORE the main loading if (!ExecuteTLS(result)) { goto error; } // get entry point of loaded library if (result->headers->OptionalHeader.AddressOfEntryPoint != 0) { if (result->isDLL) { DllEntryProc DllEntry = (DllEntryProc) (code + result->headers->OptionalHeader.AddressOfEntryPoint); // notify library about attaching to process BOOL successfull = (*DllEntry)((HINSTANCE)code, DLL_PROCESS_ATTACH, 0); if (!successfull) { SetLastError(ERROR_DLL_INIT_FAILED); goto error; } result->initialized = TRUE; } else { result->exeEntry = (ExeEntryProc) (code + result->headers->OptionalHeader.AddressOfEntryPoint); } } else { result->exeEntry = NULL; } return (HMEMORYMODULE)result; error: // cleanup MemoryFreeLibrary(result); return NULL; } FARPROC MemoryGetProcAddress(HMEMORYMODULE module, LPCSTR name) { unsigned char *codeBase = ((PMEMORYMODULE)module)->codeBase; int idx=-1; DWORD i, *nameRef; WORD *ordinal; PIMAGE_EXPORT_DIRECTORY exports; PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY((PMEMORYMODULE)module, IMAGE_DIRECTORY_ENTRY_EXPORT); if (directory->Size == 0) { // no export table found SetLastError(ERROR_PROC_NOT_FOUND); return NULL; } exports = (PIMAGE_EXPORT_DIRECTORY) (codeBase + directory->VirtualAddress); if (exports->NumberOfNames == 0 || exports->NumberOfFunctions == 0) { // DLL doesn't export anything SetLastError(ERROR_PROC_NOT_FOUND); return NULL; } // search function name in list of exported names nameRef = (DWORD *) (codeBase + exports->AddressOfNames); ordinal = (WORD *) (codeBase + exports->AddressOfNameOrdinals); for (i=0; i<exports->NumberOfNames; i++, nameRef++, ordinal++) { if (_stricmp(name, (const char *) (codeBase + (*nameRef))) == 0) { idx = *ordinal; break; } } if (idx == -1) { // exported symbol not found SetLastError(ERROR_PROC_NOT_FOUND); return NULL; } if ((DWORD)idx > exports->NumberOfFunctions) { // name <-> ordinal number don't match SetLastError(ERROR_PROC_NOT_FOUND); return NULL; } // AddressOfFunctions contains the RVAs to the "real" functions return (FARPROC) (codeBase + (*(DWORD *) (codeBase + exports->AddressOfFunctions + (idx*4)))); } void MemoryFreeLibrary(HMEMORYMODULE mod) { PMEMORYMODULE module = (PMEMORYMODULE)mod; if (module == NULL) { return; } if (module->initialized) { // notify library about detaching from process DllEntryProc DllEntry = (DllEntryProc) (module->codeBase + module->headers->OptionalHeader.AddressOfEntryPoint); (*DllEntry)((HINSTANCE)module->codeBase, DLL_PROCESS_DETACH, 0); } if (module->modules != NULL) { // free previously opened libraries int i; for (i=0; i<module->numModules; i++) { if (module->modules[i] != NULL) { module->freeLibrary(module->modules[i], module->userdata); } } free(module->modules); } if (module->codeBase != NULL) { // release memory of library VirtualFree(module->codeBase, 0, MEM_RELEASE); } HeapFree(GetProcessHeap(), 0, module); } int MemoryCallEntryPoint(HMEMORYMODULE mod) { PMEMORYMODULE module = (PMEMORYMODULE)mod; if (module == NULL || module->isDLL || module->exeEntry == NULL || !module->isRelocated) { return -1; } return module->exeEntry(); } #define DEFAULT_LANGUAGE MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL) HMEMORYRSRC MemoryFindResource(HMEMORYMODULE module, LPCTSTR name, LPCTSTR type) { return MemoryFindResourceEx(module, name, type, DEFAULT_LANGUAGE); } static PIMAGE_RESOURCE_DIRECTORY_ENTRY _MemorySearchResourceEntry( void *root, PIMAGE_RESOURCE_DIRECTORY resources, LPCTSTR key) { PIMAGE_RESOURCE_DIRECTORY_ENTRY entries = (PIMAGE_RESOURCE_DIRECTORY_ENTRY) (resources + 1); PIMAGE_RESOURCE_DIRECTORY_ENTRY result = NULL; DWORD start; DWORD end; DWORD middle; if (!IS_INTRESOURCE(key) && key[0] == TEXT('#')) { // special case: resource id given as string TCHAR *endpos = NULL; long int tmpkey = (WORD) _tcstol((TCHAR *) &key[1], &endpos, 10); if (tmpkey <= 0xffff && lstrlen(endpos) == 0) { key = MAKEINTRESOURCE(tmpkey); } } // entries are stored as ordered list of named entries, // followed by an ordered list of id entries - we can do // a binary search to find faster... if (IS_INTRESOURCE(key)) { WORD check = (WORD) (uintptr_t) key; start = resources->NumberOfNamedEntries; end = start + resources->NumberOfIdEntries; while (end > start) { WORD entryName; middle = (start + end) >> 1; entryName = (WORD) entries[middle].Name; if (check < entryName) { end = (end != middle ? middle : middle-1); } else if (check > entryName) { start = (start != middle ? middle : middle+1); } else { result = &entries[middle]; break; } } } else { #if !defined(UNICODE) char *searchKey = NULL; int searchKeyLength = 0; #endif start = 0; end = resources->NumberOfNamedEntries; while (end > start) { // resource names are always stored using 16bit characters int cmp; PIMAGE_RESOURCE_DIR_STRING_U resourceString; middle = (start + end) >> 1; resourceString = (PIMAGE_RESOURCE_DIR_STRING_U) (((char *) root) + (entries[middle].Name & 0x7FFFFFFF)); #if !defined(UNICODE) if (searchKey == NULL || searchKeyLength < resourceString->Length) { void *tmp = realloc(searchKey, resourceString->Length); if (tmp == NULL) { break; } searchKey = (char *) tmp; } wcstombs(searchKey, resourceString->NameString, resourceString->Length); cmp = strncmp(key, searchKey, resourceString->Length); #else cmp = wcsncmp(key, resourceString->NameString, resourceString->Length); #endif if (cmp < 0) { end = (middle != end ? middle : middle-1); } else if (cmp > 0) { start = (middle != start ? middle : middle+1); } else { result = &entries[middle]; break; } } #if !defined(UNICODE) free(searchKey); #endif } return result; } HMEMORYRSRC MemoryFindResourceEx(HMEMORYMODULE module, LPCTSTR name, LPCTSTR type, WORD language) { unsigned char *codeBase = ((PMEMORYMODULE) module)->codeBase; PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY((PMEMORYMODULE) module, IMAGE_DIRECTORY_ENTRY_RESOURCE); PIMAGE_RESOURCE_DIRECTORY rootResources; PIMAGE_RESOURCE_DIRECTORY nameResources; PIMAGE_RESOURCE_DIRECTORY typeResources; PIMAGE_RESOURCE_DIRECTORY_ENTRY foundType; PIMAGE_RESOURCE_DIRECTORY_ENTRY foundName; PIMAGE_RESOURCE_DIRECTORY_ENTRY foundLanguage; if (directory->Size == 0) { // no resource table found SetLastError(ERROR_RESOURCE_DATA_NOT_FOUND); return NULL; } if (language == DEFAULT_LANGUAGE) { // use language from current thread language = LANGIDFROMLCID(GetThreadLocale()); } // resources are stored as three-level tree // - first node is the type // - second node is the name // - third node is the language rootResources = (PIMAGE_RESOURCE_DIRECTORY) (codeBase + directory->VirtualAddress); foundType = _MemorySearchResourceEntry(rootResources, rootResources, type); if (foundType == NULL) { SetLastError(ERROR_RESOURCE_TYPE_NOT_FOUND); return NULL; } typeResources = (PIMAGE_RESOURCE_DIRECTORY) (codeBase + directory->VirtualAddress + (foundType->OffsetToData & 0x7fffffff)); foundName = _MemorySearchResourceEntry(rootResources, typeResources, name); if (foundName == NULL) { SetLastError(ERROR_RESOURCE_NAME_NOT_FOUND); return NULL; } nameResources = (PIMAGE_RESOURCE_DIRECTORY) (codeBase + directory->VirtualAddress + (foundName->OffsetToData & 0x7fffffff)); foundLanguage = _MemorySearchResourceEntry(rootResources, nameResources, (LPCTSTR) (uintptr_t) language); if (foundLanguage == NULL) { // requested language not found, use first available if (nameResources->NumberOfIdEntries == 0) { SetLastError(ERROR_RESOURCE_LANG_NOT_FOUND); return NULL; } foundLanguage = (PIMAGE_RESOURCE_DIRECTORY_ENTRY) (nameResources + 1); } return (codeBase + directory->VirtualAddress + (foundLanguage->OffsetToData & 0x7fffffff)); } DWORD MemorySizeofResource(HMEMORYMODULE module, HMEMORYRSRC resource) { PIMAGE_RESOURCE_DATA_ENTRY entry = (PIMAGE_RESOURCE_DATA_ENTRY) resource; if (entry == NULL) { return 0; } return entry->Size; } LPVOID MemoryLoadResource(HMEMORYMODULE module, HMEMORYRSRC resource) { unsigned char *codeBase = ((PMEMORYMODULE) module)->codeBase; PIMAGE_RESOURCE_DATA_ENTRY entry = (PIMAGE_RESOURCE_DATA_ENTRY) resource; if (entry == NULL) { return NULL; } return codeBase + entry->OffsetToData; } int MemoryLoadString(HMEMORYMODULE module, UINT id, LPTSTR buffer, int maxsize) { return MemoryLoadStringEx(module, id, buffer, maxsize, DEFAULT_LANGUAGE); } int MemoryLoadStringEx(HMEMORYMODULE module, UINT id, LPTSTR buffer, int maxsize, WORD language) { HMEMORYRSRC resource; PIMAGE_RESOURCE_DIR_STRING_U data; DWORD size; if (maxsize == 0) { return 0; } resource = MemoryFindResourceEx(module, MAKEINTRESOURCE((id >> 4) + 1), RT_STRING, language); if (resource == NULL) { buffer[0] = 0; return 0; } data = (PIMAGE_RESOURCE_DIR_STRING_U) MemoryLoadResource(module, resource); id = id & 0x0f; while (id--) { data = (PIMAGE_RESOURCE_DIR_STRING_U) (((char *) data) + (data->Length + 1) * sizeof(WCHAR)); } if (data->Length == 0) { SetLastError(ERROR_RESOURCE_NAME_NOT_FOUND); buffer[0] = 0; return 0; } size = data->Length; if (size >= (DWORD) maxsize) { size = maxsize; } else { buffer[size] = 0; } #if defined(UNICODE) wcsncpy(buffer, data->NameString, size); #else wcstombs(buffer, data->NameString, size); #endif return size; } |
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