Пример #1
0
Файл: asm.go Проект: rsc/tmp
func assemble(file string) int {
	if outfile == "" {
		outfile = strings.TrimSuffix(filepath.Base(file), ".s") + "." + string(Thechar)
	}

	of, err := os.Create(outfile)
	if err != nil {
		Yyerror("%ca: cannot create %s", Thechar, outfile)
		errorexit()
	}

	obuf = *obj.Binitw(of)
	fmt.Fprintf(&obuf, "go object %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion())
	fmt.Fprintf(&obuf, "!\n")

	var i int
	for Pass = 1; Pass <= 2; Pass++ {
		pinit(file)
		for i = 0; i < len(Dlist); i++ {
			dodefine(Dlist[i])
		}
		Yyparse()
		Cclean()
		if nerrors != 0 {
			return nerrors
		}
	}

	obj.Writeobjdirect(Ctxt, &obuf)
	obj.Bflush(&obuf)
	return 0
}
Пример #2
0
Файл: lex.go Проект: rsc/tmp
func doversion() {
	p := obj.Expstring()
	if p == "X:none" {
		p = ""
	}
	sep := ""
	if p != "" {
		sep = " "
	}
	fmt.Printf("%cg version %s%s%s\n", Thearch.Thechar, obj.Getgoversion(), sep, p)
	os.Exit(0)
}
Пример #3
0
Файл: lex.go Проект: rsc/tmp
func importfile(f *Val, line int) {
	if f.Ctype != CTSTR {
		Yyerror("import statement not a string")
		fakeimport()
		return
	}

	if len(f.U.Sval) == 0 {
		Yyerror("import path is empty")
		fakeimport()
		return
	}

	if isbadimport(f.U.Sval) {
		fakeimport()
		return
	}

	// The package name main is no longer reserved,
	// but we reserve the import path "main" to identify
	// the main package, just as we reserve the import
	// path "math" to identify the standard math package.
	if f.U.Sval == "main" {
		Yyerror("cannot import \"main\"")
		errorexit()
	}

	if myimportpath != "" && f.U.Sval == myimportpath {
		Yyerror("import %q while compiling that package (import cycle)", f.U.Sval)
		errorexit()
	}

	if f.U.Sval == "unsafe" {
		if safemode != 0 {
			Yyerror("cannot import package unsafe")
			errorexit()
		}

		importpkg = mkpkg(f.U.Sval)
		cannedimports("unsafe.6", unsafeimport)
		imported_unsafe = 1
		return
	}

	path_ := f.U.Sval
	if islocalname(path_) {
		if path_[0] == '/' {
			Yyerror("import path cannot be absolute path")
			fakeimport()
			return
		}

		prefix := Ctxt.Pathname
		if localimport != "" {
			prefix = localimport
		}
		cleanbuf := prefix
		cleanbuf += "/"
		cleanbuf += path_
		cleanbuf = path.Clean(cleanbuf)
		path_ = cleanbuf

		if isbadimport(path_) {
			fakeimport()
			return
		}
	}

	file, found := findpkg(path_)
	if !found {
		Yyerror("can't find import: %q", f.U.Sval)
		errorexit()
	}

	importpkg = mkpkg(path_)

	// If we already saw that package, feed a dummy statement
	// to the lexer to avoid parsing export data twice.
	if importpkg.Imported != 0 {
		tag := ""
		if importpkg.Safe {
			tag = "safe"
		}

		p := fmt.Sprintf("package %s %s\n$$\n", importpkg.Name, tag)
		cannedimports(file, p)
		return
	}

	importpkg.Imported = 1

	var err error
	var imp *obj.Biobuf
	imp, err = obj.Bopenr(file)
	if err != nil {
		Yyerror("can't open import: %q: %v", f.U.Sval, err)
		errorexit()
	}

	if strings.HasSuffix(file, ".a") {
		if !skiptopkgdef(imp) {
			Yyerror("import %s: not a package file", file)
			errorexit()
		}
	}

	// check object header
	p := obj.Brdstr(imp, '\n', 1)

	if p != "empty archive" {
		if !strings.HasPrefix(p, "go object ") {
			Yyerror("import %s: not a go object file", file)
			errorexit()
		}

		q := fmt.Sprintf("%s %s %s %s", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
		if p[10:] != q {
			Warn("WARNING ONLY: import %s: object is [%s] expected [%s]", file, p[10:], q)
			//errorexit()
		}
	}

	// assume files move (get installed)
	// so don't record the full path.
	linehist(file[len(file)-len(path_)-2:], -1, 1) // acts as #pragma lib

	/*
	 * position the input right
	 * after $$ and return
	 */
	pushedio = curio

	curio.bin = imp
	curio.peekc = 0
	curio.peekc1 = 0
	curio.infile = file
	curio.nlsemi = 0
	typecheckok = 1

	var c int32
	for {
		c = int32(getc())
		if c == EOF {
			break
		}
		if c != '$' {
			continue
		}
		c = int32(getc())
		if c == EOF {
			break
		}
		if c != '$' {
			continue
		}
		return
	}

	Yyerror("no import in %q", f.U.Sval)
	unimportfile()
}
Пример #4
0
Файл: lib.go Проект: rsc/tmp
func doversion() {
	Exitf("version %s", obj.Getgoversion())
}
Пример #5
0
Файл: lib.go Проект: rsc/tmp
func ldobj(f *Biobuf, pkg string, length int64, pn string, file string, whence int) {
	eof := Boffset(f) + length

	start := Boffset(f)
	c1 := Bgetc(f)
	c2 := Bgetc(f)
	c3 := Bgetc(f)
	c4 := Bgetc(f)
	Bseek(f, start, 0)

	magic := uint32(c1)<<24 | uint32(c2)<<16 | uint32(c3)<<8 | uint32(c4)
	if magic == 0x7f454c46 { // \x7F E L F
		ldhostobj(ldelf, f, pkg, length, pn, file)
		return
	}

	if magic&^1 == 0xfeedface || magic&^0x01000000 == 0xcefaedfe {
		ldhostobj(ldmacho, f, pkg, length, pn, file)
		return
	}

	if c1 == 0x4c && c2 == 0x01 || c1 == 0x64 && c2 == 0x86 {
		ldhostobj(ldpe, f, pkg, length, pn, file)
		return
	}

	/* check the header */
	line := Brdline(f, '\n')
	if line == "" {
		if Blinelen(f) > 0 {
			Diag("%s: not an object file", pn)
			return
		}
		Diag("truncated object file: %s", pn)
		return
	}

	if !strings.HasPrefix(line, "go object ") {
		if strings.HasSuffix(pn, ".go") {
			Exitf("%cl: input %s is not .%c file (use %cg to compile .go files)", Thearch.Thechar, pn, Thearch.Thechar, Thearch.Thechar)
		}

		if line == Thestring {
			// old header format: just $GOOS
			Diag("%s: stale object file", pn)
			return
		}

		Diag("%s: not an object file", pn)
		return
	}

	// First, check that the basic goos, goarch, and version match.
	t := fmt.Sprintf("%s %s %s ", goos, obj.Getgoarch(), obj.Getgoversion())

	line = strings.TrimRight(line, "\n")
	if !strings.HasPrefix(line[10:]+" ", t) && Debug['f'] == 0 {
		Diag("%s: object is [%s] expected [%s]", pn, line[10:], t)
		return
	}

	// Second, check that longer lines match each other exactly,
	// so that the Go compiler and write additional information
	// that must be the same from run to run.
	if len(line) >= len(t)+10 {
		if theline == "" {
			theline = line[10:]
		} else if theline != line[10:] {
			Diag("%s: object is [%s] expected [%s]", pn, line[10:], theline)
			return
		}
	}

	/* skip over exports and other info -- ends with \n!\n */
	import0 := Boffset(f)

	c1 = '\n' // the last line ended in \n
	c2 = Bgetc(f)
	c3 = Bgetc(f)
	for c1 != '\n' || c2 != '!' || c3 != '\n' {
		c1 = c2
		c2 = c3
		c3 = Bgetc(f)
		if c3 == Beof {
			Diag("truncated object file: %s", pn)
			return
		}
	}

	import1 := Boffset(f)

	Bseek(f, import0, 0)
	ldpkg(f, pkg, import1-import0-2, pn, whence) // -2 for !\n
	Bseek(f, import1, 0)

	ldobjfile(Ctxt, f, pkg, eof-Boffset(f), pn)
}
Пример #6
0
Файл: obj.go Проект: rsc/tmp
func dumpobj() {
	var err error
	bout, err = obj.Bopenw(outfile)
	if err != nil {
		Flusherrors()
		fmt.Printf("can't create %s: %v\n", outfile, err)
		errorexit()
	}

	startobj := int64(0)
	var arhdr [ArhdrSize]byte
	if writearchive != 0 {
		obj.Bwritestring(bout, "!<arch>\n")
		arhdr = [ArhdrSize]byte{}
		obj.Bwrite(bout, arhdr[:])
		startobj = obj.Boffset(bout)
	}

	fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
	dumpexport()

	if writearchive != 0 {
		obj.Bflush(bout)
		size := obj.Boffset(bout) - startobj
		if size&1 != 0 {
			obj.Bputc(bout, 0)
		}
		obj.Bseek(bout, startobj-ArhdrSize, 0)
		formathdr(arhdr[:], "__.PKGDEF", size)
		obj.Bwrite(bout, arhdr[:])
		obj.Bflush(bout)

		obj.Bseek(bout, startobj+size+(size&1), 0)
		arhdr = [ArhdrSize]byte{}
		obj.Bwrite(bout, arhdr[:])
		startobj = obj.Boffset(bout)
		fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
	}

	if pragcgobuf != "" {
		if writearchive != 0 {
			// write empty export section; must be before cgo section
			fmt.Fprintf(bout, "\n$$\n\n$$\n\n")
		}

		fmt.Fprintf(bout, "\n$$  // cgo\n")
		fmt.Fprintf(bout, "%s\n$$\n\n", pragcgobuf)
	}

	fmt.Fprintf(bout, "\n!\n")

	var externs *NodeList
	if externdcl != nil {
		externs = externdcl.End
	}

	dumpglobls()
	dumptypestructs()

	// Dump extra globals.
	tmp := externdcl

	if externs != nil {
		externdcl = externs.Next
	}
	dumpglobls()
	externdcl = tmp

	zero := Pkglookup("zerovalue", Runtimepkg)
	ggloblsym(zero, int32(zerosize), obj.DUPOK|obj.RODATA)

	dumpdata()
	obj.Writeobjdirect(Ctxt, bout)

	if writearchive != 0 {
		obj.Bflush(bout)
		size := obj.Boffset(bout) - startobj
		if size&1 != 0 {
			obj.Bputc(bout, 0)
		}
		obj.Bseek(bout, startobj-ArhdrSize, 0)
		name := fmt.Sprintf("_go_.%c", Thearch.Thechar)
		formathdr(arhdr[:], name, size)
		obj.Bwrite(bout, arhdr[:])
	}

	obj.Bterm(bout)
}