Added basic support for arm64

src/arm/Call.go

@@ -0,0 +1,10 @@
+package arm
+
+import "encoding/binary"
+
+// Call branches to a PC-relative offset, setting the register X30 to PC+4.
+// The offset starts from the address of this instruction and is encoded as "imm26" times 4.
+// This instruction is also known as BL (branch with link).
+func Call(code []byte, offset uint32) []byte {
+	return binary.LittleEndian.AppendUint32(code, uint32(0b100101<<26)|offset)
+}