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() {
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 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)
}
func doversion() {
p := obj.Expstring()
if p == "X:none" {
p = ""
}
sep := ""
if p != "" {
sep = " "
}
fmt.Printf("compile version %s%s%s\n", obj.Getgoversion(), sep, p)
os.Exit(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()
}
func Fatalf(fmt_ string, args ...interface{}) {
Flusherrors()
fmt.Printf("%v: internal compiler error: ", linestr(lineno))
fmt.Printf(fmt_, args...)
fmt.Printf("\n")
// If this is a released compiler version, ask for a bug report.
if strings.HasPrefix(obj.Getgoversion(), "release") {
fmt.Printf("\n")
fmt.Printf("Please file a bug report including a short program that triggers the error.\n")
fmt.Printf("https://golang.org/issue/new\n")
}
hcrash()
errorexit()
}
func writebench(filename string) error {
f, err := os.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
return err
}
var buf bytes.Buffer
fmt.Fprintln(&buf, "commit:", obj.Getgoversion())
fmt.Fprintln(&buf, "goos:", runtime.GOOS)
fmt.Fprintln(&buf, "goarch:", runtime.GOARCH)
timings.Write(&buf, "BenchmarkCompile:"+myimportpath+":")
n, err := f.Write(buf.Bytes())
if err != nil {
return err
}
if n != buf.Len() {
panic("bad writer")
}
return f.Close()
}
func ldobj(f *obj.Biobuf, pkg string, length int64, pn string, file string, whence int) {
eof := obj.Boffset(f) + length
start := obj.Boffset(f)
c1 := obj.Bgetc(f)
c2 := obj.Bgetc(f)
c3 := obj.Bgetc(f)
c4 := obj.Bgetc(f)
obj.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 := obj.Brdline(f, '\n')
if line == "" {
if obj.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 := obj.Boffset(f)
c1 = '\n' // the last line ended in \n
c2 = obj.Bgetc(f)
c3 = obj.Bgetc(f)
for c1 != '\n' || c2 != '!' || c3 != '\n' {
c1 = c2
c2 = c3
c3 = obj.Bgetc(f)
if c3 == obj.Beof {
Diag("truncated object file: %s", pn)
return
}
}
import1 := obj.Boffset(f)
obj.Bseek(f, import0, 0)
ldpkg(f, pkg, import1-import0-2, pn, whence) // -2 for !\n
obj.Bseek(f, import1, 0)
ldobjfile(Ctxt, f, pkg, eof-obj.Boffset(f), pn)
}
func doversion() {
fmt.Printf("%cl version %s\n", Thearch.Thechar, obj.Getgoversion())
Errorexit()
}
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$$\n", importpkg.Name, tag)
cannedimports(file, p)
return
}
importpkg.Imported = 1
var err error
var imp *obj.Biobuf
imp, err = obj.Bopenr(file)
if err != nil {
Yyerror("can't open import: %q: %v", f.U.Sval, err)
errorexit()
}
if strings.HasSuffix(file, ".a") {
if !skiptopkgdef(imp) {
Yyerror("import %s: not a package file", file)
errorexit()
}
}
// check object header
p := obj.Brdstr(imp, '\n', 1)
if p != "empty archive" {
if !strings.HasPrefix(p, "go object ") {
Yyerror("import %s: not a go object file", file)
errorexit()
}
q := fmt.Sprintf("%s %s %s %s", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
if p[10:] != q {
Yyerror("import %s: object is [%s] expected [%s]", file, p[10:], q)
errorexit()
}
}
// assume files move (get installed)
// so don't record the full path.
linehist(file[len(file)-len(path_)-2:], -1, 1) // acts as #pragma lib
/*
* position the input right
* after $$ 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()
}
func importfile(f *Val, indent []byte) {
if importpkg != nil {
Fatalf("importpkg not nil")
}
path_, ok := f.U.(string)
if !ok {
Yyerror("import statement not a string")
return
}
if len(path_) == 0 {
Yyerror("import path is empty")
return
}
if isbadimport(path_) {
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 path_ == "main" {
Yyerror("cannot import \"main\"")
errorexit()
}
if myimportpath != "" && path_ == myimportpath {
Yyerror("import %q while compiling that package (import cycle)", path_)
errorexit()
}
if mapped, ok := importMap[path_]; ok {
path_ = mapped
}
if path_ == "unsafe" {
if safemode {
Yyerror("cannot import package unsafe")
errorexit()
}
importpkg = unsafepkg
imported_unsafe = true
return
}
if islocalname(path_) {
if path_[0] == '/' {
Yyerror("import path cannot be absolute path")
return
}
prefix := Ctxt.Pathname
if localimport != "" {
prefix = localimport
}
path_ = path.Join(prefix, path_)
if isbadimport(path_) {
return
}
}
file, found := findpkg(path_)
if !found {
Yyerror("can't find import: %q", path_)
errorexit()
}
importpkg = mkpkg(path_)
if importpkg.Imported {
return
}
importpkg.Imported = true
impf, err := os.Open(file)
if err != nil {
Yyerror("can't open import: %q: %v", path_, err)
errorexit()
}
defer impf.Close()
imp := bufio.NewReader(impf)
if strings.HasSuffix(file, ".a") {
if !skiptopkgdef(imp) {
Yyerror("import %s: not a package file", file)
errorexit()
}
}
// check object header
p, err := imp.ReadString('\n')
if err != nil {
log.Fatalf("reading input: %v", err)
}
if len(p) > 0 {
p = p[:len(p)-1]
}
if p != "empty archive" {
if !strings.HasPrefix(p, "go object ") {
Yyerror("import %s: not a go object file: %s", file, p)
errorexit()
}
q := fmt.Sprintf("%s %s %s %s", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
if p[10:] != q {
Yyerror("import %s: object is [%s] expected [%s]", file, p[10:], q)
errorexit()
}
}
// process header lines
for {
p, err = imp.ReadString('\n')
if err != nil {
log.Fatalf("reading input: %v", err)
}
if p == "\n" {
break // header ends with blank line
}
if strings.HasPrefix(p, "safe") {
importpkg.Safe = true
break // ok to ignore rest
}
}
// assume files move (get installed)
// so don't record the full path.
linehistpragma(file[len(file)-len(path_)-2:]) // acts as #pragma lib
// In the importfile, if we find:
// $$\n (textual format): not supported anymore
// $$B\n (binary format) : import directly, then feed the lexer a dummy statement
// look for $$
var c byte
for {
c, err = imp.ReadByte()
if err != nil {
break
}
if c == '$' {
c, err = imp.ReadByte()
if c == '$' || err != nil {
break
}
}
}
// get character after $$
if err == nil {
c, _ = imp.ReadByte()
}
switch c {
case '\n':
Yyerror("cannot import %s: old export format no longer supported (recompile library)", path_)
case 'B':
if Debug_export != 0 {
fmt.Printf("importing %s (%s)\n", path_, file)
}
imp.ReadByte() // skip \n after $$B
Import(imp)
default:
Yyerror("no import in %q", path_)
errorexit()
}
if safemode && !importpkg.Safe {
Yyerror("cannot import unsafe package %q", importpkg.Path)
}
}
func importfile(f *Val, indent []byte) {
if importpkg != nil {
Fatalf("importpkg not nil")
}
path_, ok := f.U.(string)
if !ok {
Yyerror("import statement not a string")
return
}
if len(path_) == 0 {
Yyerror("import path is empty")
return
}
if isbadimport(path_) {
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 path_ == "main" {
Yyerror("cannot import \"main\"")
errorexit()
}
if myimportpath != "" && path_ == myimportpath {
Yyerror("import %q while compiling that package (import cycle)", path_)
errorexit()
}
if mapped, ok := importMap[path_]; ok {
path_ = mapped
}
if path_ == "unsafe" {
if safemode != 0 {
Yyerror("cannot import package unsafe")
errorexit()
}
importpkg = unsafepkg
imported_unsafe = true
return
}
if islocalname(path_) {
if path_[0] == '/' {
Yyerror("import path cannot be absolute path")
return
}
prefix := Ctxt.Pathname
if localimport != "" {
prefix = localimport
}
path_ = path.Join(prefix, path_)
if isbadimport(path_) {
return
}
}
file, found := findpkg(path_)
if !found {
Yyerror("can't find import: %q", path_)
errorexit()
}
importpkg = mkpkg(path_)
if importpkg.Imported {
return
}
importpkg.Imported = true
imp, err := obj.Bopenr(file)
if err != nil {
Yyerror("can't open import: %q: %v", path_, err)
errorexit()
}
defer obj.Bterm(imp)
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 {
Yyerror("import %s: object is [%s] expected [%s]", file, p[10:], q)
errorexit()
}
}
// assume files move (get installed)
// so don't record the full path.
linehistpragma(file[len(file)-len(path_)-2:]) // acts as #pragma lib
// In the importfile, if we find:
// $$\n (old format): position the input right after $$\n and return
// $$B\n (new format): import directly, then feed the lexer a dummy statement
// look for $$
var c int
for {
c = obj.Bgetc(imp)
if c < 0 {
break
}
if c == '$' {
c = obj.Bgetc(imp)
if c == '$' || c < 0 {
break
}
}
}
// get character after $$
if c >= 0 {
c = obj.Bgetc(imp)
}
switch c {
case '\n':
// old export format
parse_import(imp, indent)
case 'B':
// new export format
obj.Bgetc(imp) // skip \n after $$B
Import(imp)
default:
Yyerror("no import in %q", path_)
errorexit()
}
if safemode != 0 && !importpkg.Safe {
Yyerror("cannot import unsafe package %q", importpkg.Path)
}
}
func dumpobj1(outfile string, mode int) {
var err error
bout, err = bio.Create(outfile)
if err != nil {
Flusherrors()
fmt.Printf("can't create %s: %v\n", outfile, err)
errorexit()
}
startobj := int64(0)
var arhdr [ArhdrSize]byte
if writearchive {
bout.WriteString("!<arch>\n")
arhdr = [ArhdrSize]byte{}
bout.Write(arhdr[:])
startobj = bout.Offset()
}
printheader := func() {
fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
if buildid != "" {
fmt.Fprintf(bout, "build id %q\n", buildid)
}
if localpkg.Name == "main" {
fmt.Fprintf(bout, "main\n")
}
if safemode {
fmt.Fprintf(bout, "safe\n")
} else {
fmt.Fprintf(bout, "----\n") // room for some other tool to write "safe"
}
fmt.Fprintf(bout, "\n") // header ends with blank line
}
printheader()
if mode&modeCompilerObj != 0 {
dumpexport()
}
if writearchive {
bout.Flush()
size := bout.Offset() - startobj
if size&1 != 0 {
bout.WriteByte(0)
}
bout.Seek(startobj-ArhdrSize, 0)
formathdr(arhdr[:], "__.PKGDEF", size)
bout.Write(arhdr[:])
bout.Flush()
bout.Seek(startobj+size+(size&1), 0)
}
if mode&modeLinkerObj == 0 {
bout.Close()
return
}
if writearchive {
// start object file
arhdr = [ArhdrSize]byte{}
bout.Write(arhdr[:])
startobj = bout.Offset()
printheader()
}
if pragcgobuf != "" {
if writearchive {
// write empty export section; must be before cgo section
fmt.Fprintf(bout, "\n$$\n\n$$\n\n")
}
fmt.Fprintf(bout, "\n$$ // cgo\n")
fmt.Fprintf(bout, "%s\n$$\n\n", pragcgobuf)
}
fmt.Fprintf(bout, "\n!\n")
externs := len(externdcl)
dumpglobls()
dumptypestructs()
// Dump extra globals.
tmp := externdcl
if externdcl != nil {
externdcl = externdcl[externs:]
}
dumpglobls()
externdcl = tmp
if zerosize > 0 {
zero := Pkglookup("zero", mappkg)
ggloblsym(zero, int32(zerosize), obj.DUPOK|obj.RODATA)
}
dumpdata()
obj.Writeobjdirect(Ctxt, bout.Writer)
if writearchive {
bout.Flush()
size := bout.Offset() - startobj
if size&1 != 0 {
bout.WriteByte(0)
}
bout.Seek(startobj-ArhdrSize, 0)
formathdr(arhdr[:], "_go_.o", size)
bout.Write(arhdr[:])
}
bout.Close()
}
func dumpobj() {
var err error
bout, err = obj.Bopenw(outfile)
if err != nil {
Flusherrors()
fmt.Printf("can't create %s: %v\n", outfile, err)
errorexit()
}
startobj := int64(0)
var arhdr [ArhdrSize]byte
if writearchive != 0 {
obj.Bwritestring(bout, "!<arch>\n")
arhdr = [ArhdrSize]byte{}
obj.Bwrite(bout, arhdr[:])
startobj = obj.Boffset(bout)
}
fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
dumpexport()
if writearchive != 0 {
obj.Bflush(bout)
size := obj.Boffset(bout) - startobj
if size&1 != 0 {
obj.Bputc(bout, 0)
}
obj.Bseek(bout, startobj-ArhdrSize, 0)
formathdr(arhdr[:], "__.PKGDEF", size)
obj.Bwrite(bout, arhdr[:])
obj.Bflush(bout)
obj.Bseek(bout, startobj+size+(size&1), 0)
arhdr = [ArhdrSize]byte{}
obj.Bwrite(bout, arhdr[:])
startobj = obj.Boffset(bout)
fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
}
if pragcgobuf != "" {
if writearchive != 0 {
// write empty export section; must be before cgo section
fmt.Fprintf(bout, "\n$$\n\n$$\n\n")
}
fmt.Fprintf(bout, "\n$$ // cgo\n")
fmt.Fprintf(bout, "%s\n$$\n\n", pragcgobuf)
}
fmt.Fprintf(bout, "\n!\n")
var externs *NodeList
if externdcl != nil {
externs = externdcl.End
}
dumpglobls()
dumptypestructs()
// Dump extra globals.
tmp := externdcl
if externs != nil {
externdcl = externs.Next
}
dumpglobls()
externdcl = tmp
zero := Pkglookup("zerovalue", Runtimepkg)
ggloblsym(zero, int32(zerosize), obj.DUPOK|obj.RODATA)
dumpdata()
obj.Writeobjdirect(Ctxt, bout)
if writearchive != 0 {
obj.Bflush(bout)
size := obj.Boffset(bout) - startobj
if size&1 != 0 {
obj.Bputc(bout, 0)
}
obj.Bseek(bout, startobj-ArhdrSize, 0)
name := fmt.Sprintf("_go_.%c", Thearch.Thechar)
formathdr(arhdr[:], name, size)
obj.Bwrite(bout, arhdr[:])
}
obj.Bterm(bout)
}
func doversion() {
Exitf("version %s", obj.Getgoversion())
}
func dumpobj() {
var err error
bout, err = obj.Bopenw(outfile)
if err != nil {
Flusherrors()
fmt.Printf("can't create %s: %v\n", outfile, err)
errorexit()
}
startobj := int64(0)
var arhdr [ArhdrSize]byte
if writearchive != 0 {
obj.Bwritestring(bout, "!<arch>\n")
arhdr = [ArhdrSize]byte{}
bout.Write(arhdr[:])
startobj = obj.Boffset(bout)
}
fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
dumpexport()
if writearchive != 0 {
bout.Flush()
size := obj.Boffset(bout) - startobj
if size&1 != 0 {
obj.Bputc(bout, 0)
}
obj.Bseek(bout, startobj-ArhdrSize, 0)
formathdr(arhdr[:], "__.PKGDEF", size)
bout.Write(arhdr[:])
bout.Flush()
obj.Bseek(bout, startobj+size+(size&1), 0)
arhdr = [ArhdrSize]byte{}
bout.Write(arhdr[:])
startobj = obj.Boffset(bout)
fmt.Fprintf(bout, "go object %s %s %s %s\n", obj.Getgoos(), obj.Getgoarch(), obj.Getgoversion(), obj.Expstring())
}
if pragcgobuf != "" {
if writearchive != 0 {
// write empty export section; must be before cgo section
fmt.Fprintf(bout, "\n$$\n\n$$\n\n")
}
fmt.Fprintf(bout, "\n$$ // cgo\n")
fmt.Fprintf(bout, "%s\n$$\n\n", pragcgobuf)
}
fmt.Fprintf(bout, "\n!\n")
externs := len(externdcl)
dumpglobls()
dumptypestructs()
// Dump extra globals.
tmp := externdcl
if externdcl != nil {
externdcl = externdcl[externs:]
}
dumpglobls()
externdcl = tmp
dumpdata()
obj.Writeobjdirect(Ctxt, bout)
if writearchive != 0 {
bout.Flush()
size := obj.Boffset(bout) - startobj
if size&1 != 0 {
obj.Bputc(bout, 0)
}
obj.Bseek(bout, startobj-ArhdrSize, 0)
formathdr(arhdr[:], "_go_.o", size)
bout.Write(arhdr[:])
}
obj.Bterm(bout)
}
// TODO(gri) line argument doesn't appear to be used
func importfile(f *Val, line int) {
if _, ok := f.U.(string); !ok {
Yyerror("import statement not a string")
fakeimport()
return
}
if len(f.U.(string)) == 0 {
Yyerror("import path is empty")
fakeimport()
return
}
if isbadimport(f.U.(string)) {
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.(string) == "main" {
Yyerror("cannot import \"main\"")
errorexit()
}
if myimportpath != "" && f.U.(string) == myimportpath {
Yyerror("import %q while compiling that package (import cycle)", f.U.(string))
errorexit()
}
path_ := f.U.(string)
if mapped, ok := importMap[path_]; ok {
path_ = mapped
}
if path_ == "unsafe" {
if safemode != 0 {
Yyerror("cannot import package unsafe")
errorexit()
}
importpkg = mkpkg(f.U.(string))
cannedimports("unsafe.o", unsafeimport)
imported_unsafe = true
return
}
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.(string))
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 {
tag := ""
if importpkg.Safe {
tag = "safe"
}
p := fmt.Sprintf("package %s %s\n$$\n", importpkg.Name, tag)
cannedimports(file, p)
return
}
importpkg.Imported = true
var err error
var imp *obj.Biobuf
imp, err = obj.Bopenr(file)
if err != nil {
Yyerror("can't open import: %q: %v", f.U.(string), 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 {
Yyerror("import %s: object is [%s] expected [%s]", file, p[10:], q)
errorexit()
}
}
// assume files move (get installed)
// so don't record the full path.
linehistpragma(file[len(file)-len(path_)-2:]) // acts as #pragma lib
// In the importfile, if we find:
// $$\n (old format): position the input right after $$\n and return
// $$B\n (new format): import directly, then feed the lexer a dummy statement
// look for $$
var c int
for {
c = obj.Bgetc(imp)
if c < 0 {
break
}
if c == '$' {
c = obj.Bgetc(imp)
if c == '$' || c < 0 {
break
}
}
}
// get character after $$
if c >= 0 {
c = obj.Bgetc(imp)
}
switch c {
case '\n':
// old export format
pushedio = curio
curio.bin = imp
curio.peekc = 0
curio.peekc1 = 0
curio.infile = file
curio.nlsemi = false
typecheckok = true
push_parser()
case 'B':
// new export format
obj.Bgetc(imp) // skip \n after $$B
Import(imp)
// continue as if the package was imported before (see above)
tag := ""
if importpkg.Safe {
tag = "safe"
}
p := fmt.Sprintf("package %s %s\n$$\n", importpkg.Name, tag)
cannedimports(file, p)
// Reset incannedimport flag (we are not truly in a
// canned import) - this will cause importpkg.Direct to
// be set via parser.import_package (was issue #13977).
//
// TODO(gri) Remove this global variable and convoluted
// code in the process of streamlining the import code.
incannedimport = 0
default:
Yyerror("no import in %q", f.U.(string))
}
}