# Check 64bit unsupported NOTRACK prefix .allow_index_reg .text _start: notrack call foo notrack jmp foo fs notrack call *%rax notrack fs call *%rax notrack bnd call *%rax notrack data16 call *%rax .intel_syntax noprefix fs notrack call rax notrack fs call rax notrack bnd call rax notrack data16 call rax