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#include "Daodan_Patch.h" |
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#include <windows.h> |
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#include <stdlib.h> |
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#include <string.h> |
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|
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bool DDrPatch_MakeJump(void* from, void* to) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(from, 5, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*((unsigned char*)from) = 0xe9; // jmp rel32 |
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from = (char*)from + 1; |
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*(int*)from = (unsigned int)to - (unsigned int)from - 4; |
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VirtualProtect(from, 5, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_MakeCall(void* from, void* to) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(from, 5, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*((unsigned char*)from) = 0xe8; // call rel32 |
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from = (char*)from + 1; |
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*(int*)from = (unsigned int)to - (unsigned int)from - 4; |
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VirtualProtect(from, 5, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_String(char* dest, const unsigned char* string, int length) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, length, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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memcpy(dest, string, length); |
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VirtualProtect(dest, length, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_Byte(char* dest, unsigned char value) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, 1, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*dest = value; |
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VirtualProtect(dest, 1, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_Int32(int* dest, unsigned int value) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, 4, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*dest = value; |
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VirtualProtect(dest, 4, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_Int16(short* dest, unsigned short value) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, 2, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*dest = value; |
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VirtualProtect(dest, 2, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch__strdup(int* dest, const char* value) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, 4, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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*dest = (int)_strdup(value); |
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VirtualProtect(dest, 4, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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bool DDrPatch_NOOP(char* dest, unsigned int length) |
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{ |
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DWORD oldp; |
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|
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if (VirtualProtect(dest, length, PAGE_EXECUTE_READWRITE, &oldp)) |
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{ |
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memset(dest, 0x90, length); |
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VirtualProtect(dest, length, oldp, &oldp); |
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return true; |
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} |
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else |
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return false; |
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} |
