b := bu.get()
	if !b.objdumpFound {
		return nil, errors.New("cannot disasm: no objdump tool available")
	}
	args := []string{"--disassemble", "--demangle", "--no-show-raw-insn",
		"--line-numbers", fmt.Sprintf("--start-address=%#x", start),
		fmt.Sprintf("--stop-address=%#x", end)}

	if intelSyntax {
		if b.isLLVMObjdump {

// faulting instructions.
func clobber(t *testing.T, src string, dst *os.File, opcodes map[string]bool) {
	// Run objdump to get disassembly.
	var re *regexp.Regexp
	var disasm io.Reader
	if false {
		// TODO: go tool objdump doesn't disassemble the bmi1 instructions
		// in question correctly. See issue 48584.
		cmd := testenv.Command(t, "go", "tool", "objdump", src)
		var err error

	}
}

func (sp *sourcePrinter) expandAddresses(rpt *Report, addrs map[uint64]addrInfo, flat map[uint64]int64) {
	// We found interesting addresses (ones with non-zero samples) above.
	// Get covering address ranges and disassemble the ranges.
	ranges, unprocessed := sp.splitIntoRanges(rpt.prof, addrs, flat)
	sp.handleUnprocessed(addrs, unprocessed)

	// Trim ranges if there are too many.
	const maxRanges = 25

		return nil, nil
	}

	return cf.Lines[line-1], nil
}

// Print prints a disassembly of the file to w.
// If filter is non-nil, the disassembly only includes functions with names matching filter.
// If printCode is true, the disassembly includs corresponding source lines.
// The disassembly only includes functions that overlap the range [start, end).

	// sure the default heuristics of excluding insignificant nodes and edges
	// from the call graph do not apply. One example where it is important is
	// annotated source or disassembly listing. Those reports run on a specific
	// function (or functions), but the trimming is applied before the function
	// data is selected. So, with trimming enabled, the report could end up

// The pc is the program counter of the first instruction, used for expanding
// PC-relative addresses into absolute ones.
// The symname function queries the symbol table for the program
// being disassembled. It returns the name and base address of the symbol
// containing the target, if any; otherwise it returns "", 0.
func GoSyntax(inst Inst, pc uint64, symname func(uint64) (string, uint64)) string {
	if symname == nil {

	// specific instruction to which they are attached? It depends.
	// If they really have no meaning, they are ignored. However, a future
	// processor may assign a different meaning. As a disassembler, we
	// don't really know whether we're seeing a meaningless prefix or one
	// whose meaning we simply haven't been told yet.
	//
	// Combining the two questions, what happens when conflicting

	SampleType        string
	SampleUnit        string // Unit for the sample data from the profile.

	OutputUnit string // Units for data formatting in report.

	Symbol     *regexp.Regexp // Symbols to include on disassembly report.
	SourcePath string         // Search path for source files.
	TrimPath   string         // Paths to trim from source file paths.

	IntelSyntax bool // Whether or not to print assembly in Intel syntax.
}

// This form typically matches the syntax defined in the Power ISA Reference Manual.
func GNUSyntax(inst Inst, pc uint64) string {
	var buf bytes.Buffer
	// When there are all 0s, identify them as the disassembler
	// in binutils would.
	if inst.Enc == 0 {
		return ".long 0x0"
	} else if inst.Op == 0 {
		return "error: unknown instruction"
	}

	PC := pc
	// Special handling for some ops
	startArg := 0

// The pc is the program counter of the instruction, used for expanding
// PC-relative addresses into absolute ones.
// The symname function queries the symbol table for the program
// being disassembled. Given a target address it returns the name and base
// address of the symbol containing the target, if any; otherwise it returns "", 0.
// The reader r should read from the text segment using text addresses