diff options
Diffstat (limited to 'src/cmd/addr2line/main.go')
| -rw-r--r-- | src/cmd/addr2line/main.go | 166 |
1 files changed, 4 insertions, 162 deletions
diff --git a/src/cmd/addr2line/main.go b/src/cmd/addr2line/main.go index b94ba12ef..267f4170a 100644 --- a/src/cmd/addr2line/main.go +++ b/src/cmd/addr2line/main.go @@ -19,17 +19,14 @@ package main import ( "bufio" - "debug/elf" - "debug/gosym" - "debug/macho" - "debug/pe" - "debug/plan9obj" "flag" "fmt" "log" "os" "strconv" "strings" + + "cmd/internal/objfile" ) func printUsage(w *os.File) { @@ -60,18 +57,12 @@ func main() { usage() } - f, err := os.Open(flag.Arg(0)) + f, err := objfile.Open(flag.Arg(0)) if err != nil { log.Fatal(err) } - textStart, symtab, pclntab, err := loadTables(f) - if err != nil { - log.Fatalf("reading %s: %v", flag.Arg(0), err) - } - - pcln := gosym.NewLineTable(pclntab, textStart) - tab, err := gosym.NewTable(symtab, pcln) + tab, err := f.PCLineTable() if err != nil { log.Fatalf("reading %s: %v", flag.Arg(0), err) } @@ -102,152 +93,3 @@ func main() { } stdout.Flush() } - -func loadTables(f *os.File) (textStart uint64, symtab, pclntab []byte, err error) { - if obj, err := elf.NewFile(f); err == nil { - if sect := obj.Section(".text"); sect != nil { - textStart = sect.Addr - } - if sect := obj.Section(".gosymtab"); sect != nil { - if symtab, err = sect.Data(); err != nil { - return 0, nil, nil, err - } - } - if sect := obj.Section(".gopclntab"); sect != nil { - if pclntab, err = sect.Data(); err != nil { - return 0, nil, nil, err - } - } - return textStart, symtab, pclntab, nil - } - - if obj, err := macho.NewFile(f); err == nil { - if sect := obj.Section("__text"); sect != nil { - textStart = sect.Addr - } - if sect := obj.Section("__gosymtab"); sect != nil { - if symtab, err = sect.Data(); err != nil { - return 0, nil, nil, err - } - } - if sect := obj.Section("__gopclntab"); sect != nil { - if pclntab, err = sect.Data(); err != nil { - return 0, nil, nil, err - } - } - return textStart, 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, fmt.Errorf("pe file format not recognized") - } - if sect := obj.Section(".text"); sect != nil { - textStart = imageBase + uint64(sect.VirtualAddress) - } - if pclntab, err = loadPETable(obj, "pclntab", "epclntab"); err != nil { - return 0, nil, nil, err - } - if symtab, err = loadPETable(obj, "symtab", "esymtab"); err != nil { - return 0, nil, nil, err - } - return textStart, symtab, pclntab, nil - } - - if obj, err := plan9obj.NewFile(f); err == nil { - sym, err := findPlan9Symbol(obj, "text") - if err != nil { - return 0, nil, nil, err - } - textStart = sym.Value - if pclntab, err = loadPlan9Table(obj, "pclntab", "epclntab"); err != nil { - return 0, nil, nil, err - } - if symtab, err = loadPlan9Table(obj, "symtab", "esymtab"); err != nil { - return 0, nil, nil, err - } - return textStart, symtab, pclntab, nil - } - - return 0, nil, nil, fmt.Errorf("unrecognized binary format") -} - -func findPESymbol(f *pe.File, name string) (*pe.Symbol, error) { - for _, s := range f.Symbols { - if s.Name != name { - continue - } - if s.SectionNumber <= 0 { - return nil, fmt.Errorf("symbol %s: invalid section number %d", name, s.SectionNumber) - } - if len(f.Sections) < int(s.SectionNumber) { - return nil, fmt.Errorf("symbol %s: section number %d is larger than max %d", name, s.SectionNumber, len(f.Sections)) - } - return s, nil - } - return nil, fmt.Errorf("no %s symbol found", name) -} - -func loadPETable(f *pe.File, sname, ename string) ([]byte, error) { - ssym, err := findPESymbol(f, sname) - if err != nil { - return nil, err - } - esym, err := findPESymbol(f, ename) - if err != nil { - return nil, err - } - if ssym.SectionNumber != esym.SectionNumber { - return nil, fmt.Errorf("%s and %s symbols must be in the same section", sname, ename) - } - sect := f.Sections[ssym.SectionNumber-1] - data, err := sect.Data() - if err != nil { - return nil, err - } - return data[ssym.Value:esym.Value], nil -} - -func findPlan9Symbol(f *plan9obj.File, name string) (*plan9obj.Sym, error) { - syms, err := f.Symbols() - if err != nil { - return nil, err - } - for _, s := range syms { - if s.Name != name { - continue - } - return &s, nil - } - return nil, fmt.Errorf("no %s symbol found", name) -} - -func loadPlan9Table(f *plan9obj.File, sname, ename string) ([]byte, error) { - ssym, err := findPlan9Symbol(f, sname) - if err != nil { - return nil, err - } - esym, err := findPlan9Symbol(f, ename) - if err != nil { - return nil, err - } - text, err := findPlan9Symbol(f, "text") - if err != nil { - return nil, err - } - sect := f.Section("text") - if sect == nil { - return nil, err - } - data, err := sect.Data() - if err != nil { - return nil, err - } - return data[ssym.Value-text.Value : esym.Value-text.Value], nil -} |