loader.go

		}
		s.Attr.Set(sym.AttrLocal, local)
		s.Attr.Set(sym.AttrMakeTypelink, makeTypelink)

		if s.Type == sym.SDWARFINFO {
			// For DWARF symbols, replace `"".` to actual package prefix
			// in the symbol content.
			// TODO: maybe we should do this in the compiler and get rid
			// of this.
			patchDWARFName(s, r)
		}

		if s.Type != sym.STEXT {
			continue
		}

		// FuncInfo
		if isym == -1 {
			continue
		}
		b := r.Data(isym)
		info := goobj2.FuncInfo{}
		info.Read(b)

		if info.NoSplit != 0 {
			s.Attr |= sym.AttrNoSplit
		}
		if osym.ReflectMethod() {
			s.Attr |= sym.AttrReflectMethod
		}
		if r.Flags()&goobj2.ObjFlagShared != 0 {
			s.Attr |= sym.AttrShared
		}
		if osym.TopFrame() {
			s.Attr |= sym.AttrTopFrame
		}

		info.Pcdata = append(info.Pcdata, info.PcdataEnd) // for the ease of knowing where it ends
		pc := s.FuncInfo
		if pc == nil {
			pc = &sym.FuncInfo{}
			s.FuncInfo = pc
		}
		pc.Args = int32(info.Args)
		pc.Locals = int32(info.Locals)
		pc.Pcdata = make([]sym.Pcdata, len(info.Pcdata)-1) // -1 as we appended one above
		pc.Funcdataoff = make([]int64, len(info.Funcdataoff))
		pc.File = make([]*sym.Symbol, len(info.File))
		pc.InlTree = make([]sym.InlinedCall, len(info.InlTree))
		pc.Pcsp.P = r.BytesAt(pcdataBase+info.Pcsp, int(info.Pcfile-info.Pcsp))
		pc.Pcfile.P = r.BytesAt(pcdataBase+info.Pcfile, int(info.Pcline-info.Pcfile))
		pc.Pcline.P = r.BytesAt(pcdataBase+info.Pcline, int(info.Pcinline-info.Pcline))
		pc.Pcinline.P = r.BytesAt(pcdataBase+info.Pcinline, int(info.Pcdata[0]-info.Pcinline))
		for k := range pc.Pcdata {
			pc.Pcdata[k].P = r.BytesAt(pcdataBase+info.Pcdata[k], int(info.Pcdata[k+1]-info.Pcdata[k]))
		}
		for k := range pc.Funcdataoff {
			pc.Funcdataoff[k] = int64(info.Funcdataoff[k])
		}
		for k := range pc.File {
			pc.File[k] = resolveSymRef(info.File[k])
		}
		for k := range pc.InlTree {
			inl := &info.InlTree[k]
			pc.InlTree[k] = sym.InlinedCall{
				Parent:   inl.Parent,
				File:     resolveSymRef(inl.File),
				Line:     inl.Line,
				Func:     l.SymName(l.resolve(r, inl.Func)),
				ParentPC: inl.ParentPC,
			}
		}

		if !dupok {
			if s.Attr.OnList() {
				log.Fatalf("symbol %s listed multiple times", s.Name)
			}
			s.Attr.Set(sym.AttrOnList, true)
			lib.Textp = append(lib.Textp, s)
		} else {
			// there may ba a dup in another package
			// put into a temp list and add to text later
			lib.DupTextSyms = append(lib.DupTextSyms, s)
		}
	}
}

var emptyPkg = []byte(`"".`)

func patchDWARFName(s *sym.Symbol, r *oReader) {
	// This is kind of ugly. Really the package name should not
	// even be included here.
	if s.Size < 1 || s.P[0] != dwarf.DW_ABRV_FUNCTION {
		return
	}
	e := bytes.IndexByte(s.P, 0)
	if e == -1 {
		return
	}
	p := bytes.Index(s.P[:e], emptyPkg)
	if p == -1 {
		return
	}
	pkgprefix := []byte(r.pkgprefix)
	patched := bytes.Replace(s.P[:e], emptyPkg, pkgprefix, -1)

	s.P = append(patched, s.P[e:]...)
	s.Attr.Set(sym.AttrReadOnly, false)
	delta := int64(len(s.P)) - s.Size
	s.Size = int64(len(s.P))
	for i := range s.R {
		r := &s.R[i]
		if r.Off > int32(e) {
			r.Off += int32(delta)
		}
	}
}

// For debugging.
func (l *Loader) Dump() {
	fmt.Println("objs")
	for _, obj := range l.objs {
		if obj.r != nil {
			fmt.Println(obj.i, obj.r.unit.Lib)
		}
	}
	fmt.Println("syms")
	for i, s := range l.Syms {
		if i == 0 {
			continue
		}
		if s != nil {
			fmt.Println(i, s, s.Type)
		} else {
			fmt.Println(i, l.SymName(Sym(i)), "<not loaded>")
		}
	}
	fmt.Println("overwrite:", l.overwrite)
	fmt.Println("symsByName")
	for name, i := range l.symsByName[0] {
		fmt.Println(i, name, 0)
	}
	for name, i := range l.symsByName[1] {
		fmt.Println(i, name, 1)
	}
}