Struct LoadMemShift

bpf/instructions.go:294–296

LoadMemShift multiplies the first 4 bits of the byte at packet[Off] by 4 and stores the result in register X. This instruction is mainly useful to load into X the length of an IPv4 packet header in a single instruction, rather than have to do the arithmetic on the header's first byte by hand.

// IPv4 packet header in a single instruction, rather than have to do
// the arithmetic on the header's first byte by hand.
type LoadMemShift struct {
	Off uint32
}

// Assemble implements the Instruction Assemble method.
func (a LoadMemShift) Assemble() (RawInstruction, error) {