.text _start: xor %eax, %eax 140: testl %eax, %eax 141: .nops -(((144f-143f)-(141b-140b)) > 0)*((144f-143f)-(141b-140b)),5 142: xor %eax, %eax .pushsection .altinstr_replacement,"ax" 143: mov %eax, %eax mov %eax, %eax mov %eax, %eax mov %eax, %eax jmp foo 144: .popsection xor %eax, %eax