Golang obj.Getgoarch函數代碼示例

func addinitarray() (c *IMAGE_SECTION_HEADER) {
	// The size below was determined by the specification for array relocations,
	// and by observing what GCC writes here. If the initarray section grows to
	// contain more than one constructor entry, the size will need to be 8 * constructor_count.
	// However, the entire Go runtime is initialized from just one function, so it is unlikely
	// that this will need to grow in the future.
	var size int
	switch obj.Getgoarch() {
	default:
		fmt.Fprintf(os.Stderr, "link: unknown architecture for PE: %q\n", obj.Getgoarch())
		os.Exit(2)
	case "386":
		size = 4
	case "amd64":
		size = 8
	}

	c = addpesection(".ctors", size, size)
	c.Characteristics = IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ
	c.SizeOfRawData = uint32(size)

	Cseek(int64(c.PointerToRawData))
	chksectoff(c, Cpos())
	init_entry := Linklookup(Ctxt, INITENTRY, 0)
	addr := uint64(init_entry.Value) - init_entry.Sect.Vaddr

	switch obj.Getgoarch() {
	case "386":
		Lputl(uint32(addr))
	case "amd64":
		Vputl(addr)
	}

	return c
}

func main() {
	// disable timestamps for reproducible output
	log.SetFlags(0)
	log.SetPrefix("compile: ")

	switch obj.Getgoarch() {
	default:
		fmt.Fprintf(os.Stderr, "compile: unknown architecture %q\n", obj.Getgoarch())
		os.Exit(2)
	case "386":
		x86.Main()
	case "amd64", "amd64p32":
		amd64.Main()
	case "arm":
		arm.Main()
	case "arm64":
		arm64.Main()
	case "mips64", "mips64le":
		mips64.Main()
	case "ppc64", "ppc64le":
		ppc64.Main()
	case "s390x":
		s390x.Main()
	}
}

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()
}

func linkarchinit() {
	ld.Thestring = obj.Getgoarch()
	ld.Thelinkarch = &ld.Linkarm64

	ld.Thearch.Thechar = thechar
	ld.Thearch.Ptrsize = ld.Thelinkarch.Ptrsize
	ld.Thearch.Intsize = ld.Thelinkarch.Ptrsize
	ld.Thearch.Regsize = ld.Thelinkarch.Regsize
	ld.Thearch.Funcalign = FuncAlign
	ld.Thearch.Maxalign = MaxAlign
	ld.Thearch.Minlc = MINLC
	ld.Thearch.Dwarfregsp = DWARFREGSP
	ld.Thearch.Dwarfreglr = DWARFREGLR

	ld.Thearch.Adddynrel = adddynrel
	ld.Thearch.Archinit = archinit
	ld.Thearch.Archreloc = archreloc
	ld.Thearch.Archrelocvariant = archrelocvariant
	ld.Thearch.Asmb = asmb
	ld.Thearch.Elfreloc1 = elfreloc1
	ld.Thearch.Elfsetupplt = elfsetupplt
	ld.Thearch.Gentext = gentext
	ld.Thearch.Machoreloc1 = machoreloc1
	ld.Thearch.Lput = ld.Lputl
	ld.Thearch.Wput = ld.Wputl
	ld.Thearch.Vput = ld.Vputl

	ld.Thearch.Linuxdynld = "/lib/ld-linux-aarch64.so.1"

	ld.Thearch.Freebsddynld = "XXX"
	ld.Thearch.Openbsddynld = "XXX"
	ld.Thearch.Netbsddynld = "XXX"
	ld.Thearch.Dragonflydynld = "XXX"
	ld.Thearch.Solarisdynld = "XXX"
}

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)
	obuf.Flush()
	return 0
}

func Main() {
	gc.Thearch.LinkArch = &ppc64.Linkppc64
	if obj.Getgoarch() == "ppc64le" {
		gc.Thearch.LinkArch = &ppc64.Linkppc64le
	}
	gc.Thearch.REGSP = ppc64.REGSP
	gc.Thearch.REGCTXT = ppc64.REGCTXT
	gc.Thearch.REGCALLX = ppc64.REG_R3
	gc.Thearch.REGCALLX2 = ppc64.REG_R4
	gc.Thearch.REGRETURN = ppc64.REG_R3
	gc.Thearch.REGMIN = ppc64.REG_R0
	gc.Thearch.REGMAX = ppc64.REG_R31
	gc.Thearch.FREGMIN = ppc64.REG_F0
	gc.Thearch.FREGMAX = ppc64.REG_F31
	gc.Thearch.MAXWIDTH = 1 << 50
	gc.Thearch.ReservedRegs = resvd

	gc.Thearch.Betypeinit = betypeinit
	gc.Thearch.Cgen_hmul = cgen_hmul
	gc.Thearch.Cgen_shift = cgen_shift
	gc.Thearch.Clearfat = clearfat
	gc.Thearch.Defframe = defframe
	gc.Thearch.Dodiv = dodiv
	gc.Thearch.Excise = excise
	gc.Thearch.Expandchecks = expandchecks
	gc.Thearch.Getg = getg
	gc.Thearch.Gins = gins
	gc.Thearch.Ginscmp = ginscmp
	gc.Thearch.Ginscon = ginscon
	gc.Thearch.Ginsnop = ginsnop
	gc.Thearch.Gmove = gmove
	gc.Thearch.Peep = peep
	gc.Thearch.Proginfo = proginfo
	gc.Thearch.Regtyp = regtyp
	gc.Thearch.Sameaddr = sameaddr
	gc.Thearch.Smallindir = smallindir
	gc.Thearch.Stackaddr = stackaddr
	gc.Thearch.Blockcopy = blockcopy
	gc.Thearch.Sudoaddable = sudoaddable
	gc.Thearch.Sudoclean = sudoclean
	gc.Thearch.Excludedregs = excludedregs
	gc.Thearch.RtoB = RtoB
	gc.Thearch.FtoB = RtoB
	gc.Thearch.BtoR = BtoR
	gc.Thearch.BtoF = BtoF
	gc.Thearch.Optoas = optoas
	gc.Thearch.Doregbits = doregbits
	gc.Thearch.Regnames = regnames

	gc.Thearch.SSARegToReg = ssaRegToReg
	gc.Thearch.SSAMarkMoves = ssaMarkMoves
	gc.Thearch.SSAGenValue = ssaGenValue
	gc.Thearch.SSAGenBlock = ssaGenBlock

	initvariants()
	initproginfo()

	gc.Main()
	gc.Exit(0)
}

func (mode *BuildMode) Set(s string) error {
	goos := obj.Getgoos()
	goarch := obj.Getgoarch()
	badmode := func() error {
		return fmt.Errorf("buildmode %s not supported on %s/%s", s, goos, goarch)
	}
	switch s {
	default:
		return fmt.Errorf("invalid buildmode: %q", s)
	case "exe":
		*mode = BuildmodeExe
	case "c-archive":
		switch goos {
		case "darwin", "linux":
		default:
			return badmode()
		}
		*mode = BuildmodeCArchive
	case "c-shared":
		if goarch != "amd64" && goarch != "arm" {
			return badmode()
		}
		*mode = BuildmodeCShared
	case "shared":
		if goos != "linux" || goarch != "amd64" {
			return badmode()
		}
		*mode = BuildmodeShared
	}
	return nil
}

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()
}

func Main() {
	gc.Thearch.LinkArch = &x86.Linkamd64
	if obj.Getgoarch() == "amd64p32" {
		gc.Thearch.LinkArch = &x86.Linkamd64p32
	}
	gc.Thearch.REGSP = x86.REGSP
	gc.Thearch.REGCTXT = x86.REGCTXT
	gc.Thearch.REGCALLX = x86.REG_BX
	gc.Thearch.REGCALLX2 = x86.REG_AX
	gc.Thearch.REGRETURN = x86.REG_AX
	gc.Thearch.REGMIN = x86.REG_AX
	gc.Thearch.REGMAX = x86.REG_R15
	gc.Thearch.FREGMIN = x86.REG_X0
	gc.Thearch.FREGMAX = x86.REG_X15
	gc.Thearch.MAXWIDTH = 1 << 50

	gc.Thearch.AddIndex = addindex
	gc.Thearch.Betypeinit = betypeinit
	gc.Thearch.Cgen_bmul = cgen_bmul
	gc.Thearch.Cgen_hmul = cgen_hmul
	gc.Thearch.Cgen_shift = cgen_shift
	gc.Thearch.Clearfat = clearfat
	gc.Thearch.Defframe = defframe
	gc.Thearch.Dodiv = dodiv
	gc.Thearch.Excise = excise
	gc.Thearch.Expandchecks = expandchecks
	gc.Thearch.Getg = getg
	gc.Thearch.Gins = gins
	gc.Thearch.Ginsboolval = ginsboolval
	gc.Thearch.Ginscmp = ginscmp
	gc.Thearch.Ginscon = ginscon
	gc.Thearch.Ginsnop = ginsnop
	gc.Thearch.Gmove = gmove
	gc.Thearch.Peep = peep
	gc.Thearch.Proginfo = proginfo
	gc.Thearch.Regtyp = regtyp
	gc.Thearch.Sameaddr = sameaddr
	gc.Thearch.Smallindir = smallindir
	gc.Thearch.Stackaddr = stackaddr
	gc.Thearch.Blockcopy = blockcopy
	gc.Thearch.Sudoaddable = sudoaddable
	gc.Thearch.Sudoclean = sudoclean
	gc.Thearch.Excludedregs = excludedregs
	gc.Thearch.RtoB = RtoB
	gc.Thearch.FtoB = FtoB
	gc.Thearch.BtoR = BtoR
	gc.Thearch.BtoF = BtoF
	gc.Thearch.Optoas = optoas
	gc.Thearch.Doregbits = doregbits
	gc.Thearch.Regnames = regnames

	gc.Thearch.SSARegToReg = ssaRegToReg
	gc.Thearch.SSAMarkMoves = ssaMarkMoves
	gc.Thearch.SSAGenValue = ssaGenValue
	gc.Thearch.SSAGenBlock = ssaGenBlock

	gc.Main()
	gc.Exit(0)
}

func main() {
	switch obj.Getgoarch() {
	default:
		fmt.Fprintf(os.Stderr, "compile: unknown architecture %q\n", obj.Getgoarch())
		os.Exit(2)
	case "386":
		x86.Main()
	case "amd64", "amd64p32":
		amd64.Main()
	case "arm":
		arm.Main()
	case "arm64":
		arm64.Main()
	case "ppc64", "ppc64le":
		ppc64.Main()
	}
}

func linkarchinit() {
	if obj.Getgoarch() == "amd64p32" {
		thelinkarch = &x86.Linkamd64p32
		gc.Thearch.Thelinkarch = thelinkarch
		thestring = "amd64p32"
		gc.Thearch.Thestring = "amd64p32"
	}
}

func mywhatsys() {
	goroot = obj.Getgoroot()
	goos = obj.Getgoos()
	goarch = obj.Getgoarch()

	if !strings.HasPrefix(goarch, Thestring) {
		log.Fatalf("cannot use %cc with GOARCH=%s", Thearch.Thechar, goarch)
	}
}

func linkarchinit() {
	thestring = obj.Getgoarch()
	gc.Thearch.Thestring = thestring
	if thestring == "ppc64le" {
		thelinkarch = &ppc64.Linkppc64le
	} else {
		thelinkarch = &ppc64.Linkppc64
	}
	gc.Thearch.Thelinkarch = thelinkarch
}

func linkarchinit() {
	thestring = obj.Getgoarch()
	gc.Thearch.Thestring = thestring
	if thestring == "mips64le" {
		thelinkarch = &mips.Linkmips64le
	} else {
		thelinkarch = &mips.Linkmips64
	}
	gc.Thearch.Thelinkarch = thelinkarch
}

func Main() {
	gc.Thearch.Thechar = '0'
	gc.Thearch.Thestring = "mips64"
	gc.Thearch.Thelinkarch = &mips.Linkmips64
	if obj.Getgoarch() == "mips64le" {
		gc.Thearch.Thestring = "mips64le"
		gc.Thearch.Thelinkarch = &mips.Linkmips64le
	}
	gc.Thearch.REGSP = mips.REGSP
	gc.Thearch.REGCTXT = mips.REGCTXT
	gc.Thearch.REGCALLX = mips.REG_R1
	gc.Thearch.REGCALLX2 = mips.REG_R2
	gc.Thearch.REGRETURN = mips.REGRET
	gc.Thearch.REGMIN = mips.REG_R0
	gc.Thearch.REGMAX = mips.REG_R31
	gc.Thearch.FREGMIN = mips.REG_F0
	gc.Thearch.FREGMAX = mips.REG_F31
	gc.Thearch.MAXWIDTH = 1 << 50
	gc.Thearch.ReservedRegs = resvd

	gc.Thearch.Betypeinit = betypeinit
	gc.Thearch.Cgen_hmul = cgen_hmul
	gc.Thearch.Cgen_shift = cgen_shift
	gc.Thearch.Clearfat = clearfat
	gc.Thearch.Defframe = defframe
	gc.Thearch.Dodiv = dodiv
	gc.Thearch.Excise = excise
	gc.Thearch.Expandchecks = expandchecks
	gc.Thearch.Getg = getg
	gc.Thearch.Gins = gins
	gc.Thearch.Ginscmp = ginscmp
	gc.Thearch.Ginscon = ginscon
	gc.Thearch.Ginsnop = ginsnop
	gc.Thearch.Gmove = gmove
	gc.Thearch.Peep = peep
	gc.Thearch.Proginfo = proginfo
	gc.Thearch.Regtyp = regtyp
	gc.Thearch.Sameaddr = sameaddr
	gc.Thearch.Smallindir = smallindir
	gc.Thearch.Stackaddr = stackaddr
	gc.Thearch.Blockcopy = blockcopy
	gc.Thearch.Sudoaddable = sudoaddable
	gc.Thearch.Sudoclean = sudoclean
	gc.Thearch.Excludedregs = excludedregs
	gc.Thearch.RtoB = RtoB
	gc.Thearch.FtoB = RtoB
	gc.Thearch.BtoR = BtoR
	gc.Thearch.BtoF = BtoF
	gc.Thearch.Optoas = optoas
	gc.Thearch.Doregbits = doregbits
	gc.Thearch.Regnames = regnames

	gc.Main()
	gc.Exit(0)
}