Thread: memcpy access violation reading

Recently, i learn how to C by making a program by peeking to another public source code and i got stopped working error whenever i run it.

I got "Access violation writing location" from debuger.

Code:

VOID LoadSection(HMODULE hModule, PUINT8 oBinary, IMAGE_SECTION_HEADER *section)
{
    LPVOID targetAddress = (uint8_t*)((PUINT8)hModule + section->VirtualAddress);
    LPVOID sourceAddress = oBinary + section->PointerToRawData;
    
    if ((uintptr_t)targetAddress >= 0x140000000 + 0x60000000)
    {
        return;
    }
    
    if (section->SizeOfRawData > 0)
    {
        size_t sizeOfData = min(section->SizeOfRawData, section->Misc.VirtualSize);
        memcpy(targetAddress, sourceAddress, sizeOfData);
            // When i removed this memcpy line, i got no error on runtime.
        DWORD oldProtect;
        VirtualProtect(targetAddress, sizeOfData, PAGE_EXECUTE_READWRITE, &oldProtect);
    }
}

Try

Code:

 #include <mem.h>

at the beginning. Might be far fetch but worth a shot.

i already include it, still ain't work.

Originally Posted by Tien Nguyen

Try

Code:

 #include <mem.h>

at the beginning. Might be far fetch but worth a shot.