func openPlan9(r *os.File) (rawFile, error) {
f, err := plan9obj.NewFile(r)
if err != nil {
return nil, err
}
return &plan9File{f}, nil
}
func size(name string) error {
f, err := os.Open(name)
if err != nil {
return err
}
defer f.Close()
p, err := plan9obj.NewFile(f)
if err != nil {
return fmt.Errorf("%v: %v", name, err)
}
textsz := uint32(0)
if s := p.Section("text"); s != nil {
textsz += s.Size
}
datasz := uint32(0)
if s := p.Section("data"); s != nil {
datasz += s.Size
}
fmt.Printf("%dt + %dd + %db = %d\t%s\n", textsz, datasz, p.Bss, textsz+datasz+p.Bss, name)
return nil
}
func plan9Symbols(f *os.File) []Sym {
p, err := plan9obj.NewFile(f)
if err != nil {
errorf("parsing %s: %v", f.Name(), err)
return nil
}
plan9Syms, err := p.Symbols()
if err != nil {
errorf("parsing %s: %v", f.Name(), err)
return nil
}
// Build sorted list of addresses of all symbols.
// We infer the size of a symbol by looking at where the next symbol begins.
var addrs []uint64
for _, s := range plan9Syms {
addrs = append(addrs, s.Value)
}
sort.Sort(uint64s(addrs))
var syms []Sym
for _, s := range plan9Syms {
sym := Sym{Addr: s.Value, Name: s.Name, Code: rune(s.Type)}
i := sort.Search(len(addrs), func(x int) bool { return addrs[x] > s.Value })
if i < len(addrs) {
sym.Size = int64(addrs[i] - s.Value)
}
syms = append(syms, sym)
}
return syms
}
func loadTables(f *os.File) (textStart uint64, textData, symtab, pclntab []byte, err error) {
if obj, err := elf.NewFile(f); err == nil {
if sect := obj.Section(".text"); sect != nil {
textStart = sect.Addr
textData, _ = sect.Data()
}
if sect := obj.Section(".gosymtab"); sect != nil {
if symtab, err = sect.Data(); err != nil {
return 0, nil, nil, nil, err
}
}
if sect := obj.Section(".gopclntab"); sect != nil {
if pclntab, err = sect.Data(); err != nil {
return 0, nil, nil, nil, err
}
}
return textStart, textData, symtab, pclntab, nil
}
if obj, err := macho.NewFile(f); err == nil {
if sect := obj.Section("__text"); sect != nil {
textStart = sect.Addr
textData, _ = sect.Data()
}
if sect := obj.Section("__gosymtab"); sect != nil {
if symtab, err = sect.Data(); err != nil {
return 0, nil, nil, nil, err
}
}
if sect := obj.Section("__gopclntab"); sect != nil {
if pclntab, err = sect.Data(); err != nil {
return 0, nil, nil, nil, err
}
}
return textStart, textData, symtab, pclntab, nil
}
if obj, err := pe.NewFile(f); err == nil {
var imageBase uint64
switch oh := obj.OptionalHeader.(type) {
case *pe.OptionalHeader32:
imageBase = uint64(oh.ImageBase)
case *pe.OptionalHeader64:
imageBase = oh.ImageBase
default:
return 0, nil, nil, nil, fmt.Errorf("pe file format not recognized")
}
if sect := obj.Section(".text"); sect != nil {
textStart = imageBase + uint64(sect.VirtualAddress)
textData, _ = sect.Data()
}
if pclntab, err = loadPETable(obj, "pclntab", "epclntab"); err != nil {
return 0, nil, nil, nil, err
}
if symtab, err = loadPETable(obj, "symtab", "esymtab"); err != nil {
return 0, nil, nil, nil, err
}
return textStart, textData, symtab, pclntab, nil
}
if obj, err := plan9obj.NewFile(f); err == nil {
sym, err := findPlan9Symbol(obj, "text")
if err != nil {
return 0, nil, nil, nil, err
}
textStart = sym.Value
if sect := obj.Section("text"); sect != nil {
textData, _ = sect.Data()
}
if pclntab, err = loadPlan9Table(obj, "pclntab", "epclntab"); err != nil {
return 0, nil, nil, nil, err
}
if symtab, err = loadPlan9Table(obj, "symtab", "esymtab"); err != nil {
return 0, nil, nil, nil, err
}
return textStart, textData, symtab, pclntab, nil
}
return 0, nil, nil, nil, fmt.Errorf("unrecognized binary format")
}