Пример #1
0
Файл: lex.go Проект: Ericean/go
func outcode(a int, g2 *Addr2) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	p = new(obj.Prog)
	*p = obj.Prog{}
	p.Ctxt = asm.Ctxt
	p.As = int16(a)
	p.Lineno = stmtline
	p.From = g2.from
	p.To = g2.to
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {

		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Пример #2
0
func outgcode(a int, g1 *obj.Addr, reg int, g2, g3 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	p = asm.Ctxt.NewProg()
	p.As = int16(a)
	p.Lineno = stmtline
	if nosched != 0 {
		p.Mark |= ppc64.NOSCHED
	}
	p.From = *g1
	p.Reg = int16(reg)
	p.From3 = *g2
	p.To = *g3
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Пример #3
0
func newplist() *obj.Plist {
	pl := obj.Linknewplist(Ctxt)

	Pc = Ctxt.NewProg()
	Clearp(Pc)
	pl.Firstpc = Pc

	return pl
}
Пример #4
0
func main() {
	log.SetFlags(0)
	log.SetPrefix("asm: ")

	GOARCH := obj.Getgoarch()

	architecture := arch.Set(GOARCH)
	if architecture == nil {
		log.Fatalf("unrecognized architecture %s", GOARCH)
	}

	flags.Parse()

	ctxt := obj.Linknew(architecture.LinkArch)
	if *flags.PrintOut {
		ctxt.Debugasm = 1
	}
	ctxt.LineHist.TrimPathPrefix = *flags.TrimPath
	ctxt.Flag_dynlink = *flags.Dynlink
	ctxt.Flag_shared = *flags.Shared || *flags.Dynlink
	ctxt.Bso = bufio.NewWriter(os.Stdout)
	defer ctxt.Bso.Flush()

	// Create object file, write header.
	out, err := os.Create(*flags.OutputFile)
	if err != nil {
		log.Fatal(err)
	}
	defer bio.MustClose(out)
	buf := bufio.NewWriter(bio.MustWriter(out))

	fmt.Fprintf(buf, "go object %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion())
	fmt.Fprintf(buf, "!\n")

	lexer := lex.NewLexer(flag.Arg(0), ctxt)
	parser := asm.NewParser(ctxt, architecture, lexer)
	diag := false
	ctxt.DiagFunc = func(format string, args ...interface{}) {
		diag = true
		log.Printf(format, args...)
	}
	pList := obj.Linknewplist(ctxt)
	var ok bool
	pList.Firstpc, ok = parser.Parse()
	if ok {
		// reports errors to parser.Errorf
		obj.Writeobjdirect(ctxt, buf)
	}
	if !ok || diag {
		log.Printf("assembly of %s failed", flag.Arg(0))
		os.Remove(*flags.OutputFile)
		os.Exit(1)
	}
	buf.Flush()
}
Пример #5
0
func main() {
	log.SetFlags(0)
	log.SetPrefix("asm: ")

	GOARCH := obj.Getgoarch()

	architecture := arch.Set(GOARCH)
	if architecture == nil {
		log.Fatalf("asm: unrecognized architecture %s", GOARCH)
	}

	flags.Parse(architecture.Thechar)

	// Create object file, write header.
	fd, err := os.Create(*flags.OutputFile)
	if err != nil {
		log.Fatal(err)
	}
	ctxt := obj.Linknew(architecture.LinkArch)
	if *flags.PrintOut {
		ctxt.Debugasm = 1
	}
	ctxt.LineHist.TrimPathPrefix = *flags.TrimPath
	ctxt.Flag_dynlink = *flags.Dynlink
	if *flags.Shared || *flags.Dynlink {
		ctxt.Flag_shared = 1
	}
	ctxt.Bso = obj.Binitw(os.Stdout)
	defer ctxt.Bso.Flush()
	ctxt.Diag = log.Fatalf
	output := obj.Binitw(fd)
	fmt.Fprintf(output, "go object %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion())
	fmt.Fprintf(output, "!\n")

	lexer := lex.NewLexer(flag.Arg(0), ctxt)
	parser := asm.NewParser(ctxt, architecture, lexer)
	pList := obj.Linknewplist(ctxt)
	var ok bool
	pList.Firstpc, ok = parser.Parse()
	if !ok {
		log.Printf("asm: assembly of %s failed", flag.Arg(0))
		os.Remove(*flags.OutputFile)
		os.Exit(1)
	}
	obj.Writeobjdirect(ctxt, output)
	output.Flush()
}
Пример #6
0
func testEndToEnd(t *testing.T, goarch string) {
	lex.InitHist()
	input := filepath.Join("testdata", goarch+".s")
	output := filepath.Join("testdata", goarch+".out")
	architecture, ctxt := setArch(goarch)
	lexer := lex.NewLexer(input, ctxt)
	parser := NewParser(ctxt, architecture, lexer)
	pList := obj.Linknewplist(ctxt)
	var ok bool
	testOut = new(bytes.Buffer) // The assembler writes -S output to this buffer.
	ctxt.Bso = obj.Binitw(os.Stdout)
	defer obj.Bflush(ctxt.Bso)
	ctxt.Diag = log.Fatalf
	obj.Binitw(ioutil.Discard)
	pList.Firstpc, ok = parser.Parse()
	if !ok {
		t.Fatalf("asm: %s assembly failed", goarch)
	}
	result := string(testOut.Bytes())
	expect, err := ioutil.ReadFile(output)
	// For Windows.
	result = strings.Replace(result, `testdata\`, `testdata/`, -1)
	if err != nil {
		t.Fatal(err)
	}
	if result != string(expect) {
		if false { // Enable to capture output.
			fmt.Printf("%s", result)
			os.Exit(1)
		}
		t.Errorf("%s failed: output differs", goarch)
		r := strings.Split(result, "\n")
		e := strings.Split(string(expect), "\n")
		if len(r) != len(e) {
			t.Errorf("%s: expected %d lines, got %d", goarch, len(e), len(r))
		}
		n := len(e)
		if n > len(r) {
			n = len(r)
		}
		for i := 0; i < n; i++ {
			if r[i] != e[i] {
				t.Errorf("%s:%d:\nexpected\n\t%s\ngot\n\t%s", output, i, e[i], r[i])
			}
		}
	}
}
Пример #7
0
func Fuzz(data []byte) int {
	f, err := ioutil.TempFile("", "fuzz.asm")
	if err != nil {
		return 0
	}
	defer os.Remove(f.Name())
	defer f.Close()
	_, err = f.Write(data)
	if err != nil {
		return 0
	}
	f.Close()

	defer func() {
		if x := recover(); x != nil {
			if str, ok := x.(string); ok && str == "os.Exit" {
				return
			}
			panic(x)
		}
	}()

	const GOARCH = "amd64"
	architecture := arch.Set(GOARCH)
	fd := new(bytes.Buffer)
	ctxt := obj.Linknew(architecture.LinkArch)
	// Try to vary these and other flags:
	// ctxt.Flag_dynlink
	// ctxt.Flag_shared
	ctxt.Bso = obj.Binitw(new(bytes.Buffer))
	defer ctxt.Bso.Flush()
	ctxt.Diag = func(format string, v ...interface{}) { panic("os.Exit") }
	output := obj.Binitw(fd)
	lexer := lex.NewLexer(f.Name(), ctxt)
	parser := asm.NewParser(ctxt, architecture, lexer)
	pList := obj.Linknewplist(ctxt)
	var ok bool
	pList.Firstpc, ok = parser.Parse()
	if !ok {
		return 0
	}
	obj.Writeobjdirect(ctxt, output)
	output.Flush()
	return 1
}
Пример #8
0
func outcode(a int, g1 *obj.Addr, reg int, g2 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	if asm.Pass == 1 {
		goto out
	}

	if g1.Scale != 0 {
		if reg != 0 || g2.Scale != 0 {
			yyerror("bad addressing modes")
		}
		reg = int(g1.Scale)
	} else if g2.Scale != 0 {
		if reg != 0 {
			yyerror("bad addressing modes")
		}
		reg = int(g2.Scale)
	}

	p = asm.Ctxt.NewProg()
	p.As = int16(a)
	p.Lineno = stmtline
	if nosched != 0 {
		p.Mark |= ppc64.NOSCHED
	}
	p.From = *g1
	p.Reg = int16(reg)
	p.To = *g2
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Пример #9
0
Файл: lex.go Проект: Ericean/go
func outcode(a, scond int32, g1 *obj.Addr, reg int32, g2 *obj.Addr) {
	var p *obj.Prog
	var pl *obj.Plist

	/* hack to make B.NE etc. work: turn it into the corresponding conditional */
	if a == arm.AB {
		a = int32(bcode[(scond^arm.C_SCOND_XOR)&0xf])
		scond = (scond &^ 0xf) | Always
	}

	if asm.Pass == 1 {
		goto out
	}

	p = new(obj.Prog)
	*p = obj.Prog{}
	p.Ctxt = asm.Ctxt
	p.As = int16(a)
	p.Lineno = stmtline
	p.Scond = uint8(scond)
	p.From = *g1
	p.Reg = int16(reg)
	p.To = *g2
	p.Pc = int64(asm.PC)

	if lastpc == nil {
		pl = obj.Linknewplist(asm.Ctxt)
		pl.Firstpc = p
	} else {
		lastpc.Link = p
	}
	lastpc = p

out:
	if a != obj.AGLOBL && a != obj.ADATA {
		asm.PC++
	}
}
Пример #10
0
func testEndToEnd(t *testing.T, goarch, file string) {
	lex.InitHist()
	input := filepath.Join("testdata", file+".s")
	architecture, ctxt := setArch(goarch)
	lexer := lex.NewLexer(input, ctxt)
	parser := NewParser(ctxt, architecture, lexer)
	pList := obj.Linknewplist(ctxt)
	var ok bool
	testOut = new(bytes.Buffer) // The assembler writes test output to this buffer.
	ctxt.Bso = obj.Binitw(os.Stdout)
	defer ctxt.Bso.Flush()
	failed := false
	ctxt.Diag = func(format string, args ...interface{}) {
		failed = true
		t.Errorf(format, args...)
	}
	obj.Binitw(ioutil.Discard)
	pList.Firstpc, ok = parser.Parse()
	if !ok || failed {
		t.Errorf("asm: %s assembly failed", goarch)
		return
	}
	output := strings.Split(testOut.String(), "\n")

	// Reconstruct expected output by independently "parsing" the input.
	data, err := ioutil.ReadFile(input)
	if err != nil {
		t.Error(err)
		return
	}
	lineno := 0
	seq := 0
	hexByLine := map[string]string{}
	lines := strings.SplitAfter(string(data), "\n")
Diff:
	for _, line := range lines {
		lineno++

		// The general form of a test input line is:
		//	// comment
		//	INST args [// printed form] [// hex encoding]
		parts := strings.Split(line, "//")
		printed := strings.TrimSpace(parts[0])
		if printed == "" || strings.HasSuffix(printed, ":") { // empty or label
			continue
		}
		seq++

		var hexes string
		switch len(parts) {
		default:
			t.Errorf("%s:%d: unable to understand comments: %s", input, lineno, line)
		case 1:
			// no comment
		case 2:
			// might be printed form or hex
			note := strings.TrimSpace(parts[1])
			if isHexes(note) {
				hexes = note
			} else {
				printed = note
			}
		case 3:
			// printed form, then hex
			printed = strings.TrimSpace(parts[1])
			hexes = strings.TrimSpace(parts[2])
			if !isHexes(hexes) {
				t.Errorf("%s:%d: malformed hex instruction encoding: %s", input, lineno, line)
			}
		}

		if hexes != "" {
			hexByLine[fmt.Sprintf("%s:%d", input, lineno)] = hexes
		}

		// Canonicalize spacing in printed form.
		// First field is opcode, then tab, then arguments separated by spaces.
		// Canonicalize spaces after commas first.
		// Comma to separate argument gets a space; comma within does not.
		var buf []byte
		nest := 0
		for i := 0; i < len(printed); i++ {
			c := printed[i]
			switch c {
			case '{', '[':
				nest++
			case '}', ']':
				nest--
			case ',':
				buf = append(buf, ',')
				if nest == 0 {
					buf = append(buf, ' ')
				}
				for i+1 < len(printed) && (printed[i+1] == ' ' || printed[i+1] == '\t') {
					i++
				}
				continue
			}
			buf = append(buf, c)
		}

		f := strings.Fields(string(buf))

		// Turn relative (PC) into absolute (PC) automatically,
		// so that most branch instructions don't need comments
		// giving the absolute form.
		if len(f) > 0 && strings.HasSuffix(printed, "(PC)") {
			last := f[len(f)-1]
			n, err := strconv.Atoi(last[:len(last)-len("(PC)")])
			if err == nil {
				f[len(f)-1] = fmt.Sprintf("%d(PC)", seq+n)
			}
		}

		if len(f) == 1 {
			printed = f[0]
		} else {
			printed = f[0] + "\t" + strings.Join(f[1:], " ")
		}

		want := fmt.Sprintf("%05d (%s:%d)\t%s", seq, input, lineno, printed)
		for len(output) > 0 && (output[0] < want || output[0] != want && len(output[0]) >= 5 && output[0][:5] == want[:5]) {
			if len(output[0]) >= 5 && output[0][:5] == want[:5] {
				t.Errorf("mismatched output:\nhave %s\nwant %s", output[0], want)
				output = output[1:]
				continue Diff
			}
			t.Errorf("unexpected output: %q", output[0])
			output = output[1:]
		}
		if len(output) > 0 && output[0] == want {
			output = output[1:]
		} else {
			t.Errorf("missing output: %q", want)
		}
	}
	for len(output) > 0 {
		if output[0] == "" {
			// spurious blank caused by Split on "\n"
			output = output[1:]
			continue
		}
		t.Errorf("unexpected output: %q", output[0])
		output = output[1:]
	}

	// Checked printing.
	// Now check machine code layout.

	top := pList.Firstpc
	var text *obj.LSym
	ok = true
	ctxt.Diag = func(format string, args ...interface{}) {
		t.Errorf(format, args...)
		ok = false
	}
	obj.Flushplist(ctxt)

	for p := top; p != nil; p = p.Link {
		if p.As == obj.ATEXT {
			text = p.From.Sym
		}
		hexes := hexByLine[p.Line()]
		if hexes == "" {
			continue
		}
		delete(hexByLine, p.Line())
		if text == nil {
			t.Errorf("%s: instruction outside TEXT", p)
		}
		size := int64(len(text.P)) - p.Pc
		if p.Link != nil {
			size = p.Link.Pc - p.Pc
		} else if p.Isize != 0 {
			size = int64(p.Isize)
		}
		var code []byte
		if p.Pc < int64(len(text.P)) {
			code = text.P[p.Pc:]
			if size < int64(len(code)) {
				code = code[:size]
			}
		}
		codeHex := fmt.Sprintf("%x", code)
		if codeHex == "" {
			codeHex = "empty"
		}
		ok := false
		for _, hex := range strings.Split(hexes, " or ") {
			if codeHex == hex {
				ok = true
				break
			}
		}
		if !ok {
			t.Errorf("%s: have encoding %s, want %s", p, codeHex, hexes)
		}
	}

	if len(hexByLine) > 0 {
		var missing []string
		for key := range hexByLine {
			missing = append(missing, key)
		}
		sort.Strings(missing)
		for _, line := range missing {
			t.Errorf("%s: did not find instruction encoding", line)
		}
	}

}
Пример #11
0
func testErrors(t *testing.T, goarch, file string) {
	lex.InitHist()
	input := filepath.Join("testdata", file+".s")
	architecture, ctxt := setArch(goarch)
	lexer := lex.NewLexer(input, ctxt)
	parser := NewParser(ctxt, architecture, lexer)
	pList := obj.Linknewplist(ctxt)
	var ok bool
	testOut = new(bytes.Buffer) // The assembler writes test output to this buffer.
	ctxt.Bso = bufio.NewWriter(os.Stdout)
	defer ctxt.Bso.Flush()
	failed := false
	var errBuf bytes.Buffer
	ctxt.DiagFunc = func(format string, args ...interface{}) {
		failed = true
		s := fmt.Sprintf(format, args...)
		if !strings.HasSuffix(s, "\n") {
			s += "\n"
		}
		errBuf.WriteString(s)
	}
	pList.Firstpc, ok = parser.Parse()
	obj.Flushplist(ctxt)
	if ok && !failed {
		t.Errorf("asm: %s had no errors", goarch)
	}

	errors := map[string]string{}
	for _, line := range strings.Split(errBuf.String(), "\n") {
		if line == "" || strings.HasPrefix(line, "\t") {
			continue
		}
		m := fileLineRE.FindStringSubmatch(line)
		if m == nil {
			t.Errorf("unexpected error: %v", line)
			continue
		}
		fileline := m[1]
		if errors[fileline] != "" {
			t.Errorf("multiple errors on %s:\n\t%s\n\t%s", fileline, errors[fileline], line)
			continue
		}
		errors[fileline] = line
	}

	// Reconstruct expected errors by independently "parsing" the input.
	data, err := ioutil.ReadFile(input)
	if err != nil {
		t.Error(err)
		return
	}
	lineno := 0
	lines := strings.Split(string(data), "\n")
	for _, line := range lines {
		lineno++

		fileline := fmt.Sprintf("%s:%d", input, lineno)
		if m := errRE.FindStringSubmatch(line); m != nil {
			all := m[1]
			mm := errQuotesRE.FindAllStringSubmatch(all, -1)
			if len(mm) != 1 {
				t.Errorf("%s: invalid errorcheck line:\n%s", fileline, line)
			} else if err := errors[fileline]; err == "" {
				t.Errorf("%s: missing error, want %s", fileline, all)
			} else if !strings.Contains(err, mm[0][1]) {
				t.Errorf("%s: wrong error for %s:\n%s", fileline, all, err)
			}
		} else {
			if errors[fileline] != "" {
				t.Errorf("unexpected error on %s: %v", fileline, errors[fileline])
			}
		}
		delete(errors, fileline)
	}
	var extra []string
	for key := range errors {
		extra = append(extra, key)
	}
	sort.Strings(extra)
	for _, fileline := range extra {
		t.Errorf("unexpected error on %s: %v", fileline, errors[fileline])
	}
}