package x64

// Call places the return address on the top of the stack and continues
// program flow at the new address.
// The address is relative to the next instruction.
func Call(code []byte, address uint32) []byte {
	return append(
		code,
		0xE8,
		byte(address),
		byte(address>>8),
		byte(address>>16),
		byte(address>>24),
	)
}

// CallAtAddress places the return address on the top of the stack and
// continues program flow at the address stored at the given memory address.
// The memory address is relative to the next instruction.
func CallAtAddress(code []byte, address uint32) []byte {
	return append(
		code,
		0xFF,
		0x15,
		byte(address),
		byte(address>>8),
		byte(address>>16),
		byte(address>>24),
	)
}