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  1. #include <Windows.h>
  2.  
  3. #pragma comment(linker, "/SECTION:.text,RWE")
  4.  
  5. #define FILENAME "main.exe"
  6.  
  7.  
  8. PDWORD FindMarker(void *addr, DWORD dwMarker)
  9. {
  10. 	PBYTE ptr = (PBYTE)addr;
  11. 	while ((*(DWORD *)ptr) != dwMarker)
  12. 		ptr++;
  13. 	return (PDWORD)ptr;
  14. }
  15.  
  16. int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int nCmdShow)
  17. {
  18. 	PDWORD StartMarker = 0, EndMarker = 0;
  19. 	HANDLE hFile = NULL;
  20. 	HANDLE hFileMapping = NULL;
  21. 	LPVOID lpMapView = NULL;
  22. 	BYTE dwMarkerDistance = 0;
  23.  
  24. 	PDWORD (* volatile find)(void *, DWORD) = FindMarker;
  25.  
  26. 	hFile = CreateFile(TEXT(FILENAME),
  27. 		GENERIC_READ | GENERIC_WRITE,
  28. 		FILE_SHARE_READ,
  29. 		NULL,
  30. 		OPEN_EXISTING,
  31. 		0,
  32. 		NULL);
  33. 	hFileMapping = CreateFileMapping(hFile,
  34. 		NULL,
  35. 		PAGE_READWRITE,
  36. 		0,
  37. 		0,
  38. 		NULL);
  39. 	lpMapView = MapViewOfFile(hFileMapping,
  40. 		FILE_MAP_READ | FILE_MAP_WRITE,
  41. 		0,
  42. 		0,
  43. 		0);
  44.  
  45. 	StartMarker = find(lpMapView, 0x90909090);
  46. 	EndMarker = find(StartMarker + 1, 0x90909090);
  47. 	dwMarkerDistance = EndMarker - StartMarker;
  48.  
  49. 	TCHAR buffer[127];
  50. 	wsprintf(buffer, TEXT("%x, %x, %x"), StartMarker, EndMarker, (EndMarker - StartMarker) * sizeof(DWORD));
  51. 	MessageBox(NULL, buffer, NULL, MB_OK);
  52.  
  53. 	*((PBYTE)StartMarker - 1) = dwMarkerDistance * sizeof(DWORD) + 4;
  54.  
  55. 	StartMarker++;
  56. 	while (StartMarker < EndMarker)
  57. 	{
  58. 		*StartMarker ^= 0xDEADCAFE;
  59. 		StartMarker++;
  60. 	}
  61.  
  62. 	UnmapViewOfFile(lpMapView);
  63. 	CloseHandle(hFileMapping);
  64. 	CloseHandle(hFile);
  65. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp:1:21: fatal error: Windows.h: No such file or directory
compilation terminated.
stdout 
Standard output is empty
https://ideone.com/KOYU4M
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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