How to resolve E8 call address

static __forceinline uintptr_t getCallAddress(const uintptr_t address)
{
    if (address == 0)
        return 0;

    unsigned char buffer[5];
    memcpy(buffer, (void const*)address, 5);

    intptr_t *addr = (intptr_t*)(buffer + 1);
    *addr += (address + sizeof(buffer));

    return *addr;
}