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cmd/objdump: works with windows pe executables now

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Most code is copy from addr2line change 01dd67e5827f

Update #7406
Fixes #7937

LGTM=iant
R=golang-codereviews, iant, 0intro
CC=golang-codereviews
https://golang.org/cl/95090044
This commit is contained in:
Alex Brainman 2014-05-12 17:00:57 +10:00
parent 176041e4c6
commit 20aa947c56
2 changed files with 149 additions and 8 deletions
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48
src/cmd/objdump/main.go
View file

@ -170,18 +170,50 @@ func loadTables(f *os.File) (textStart uint64, textData, symtab, pclntab []byte,
textStart = uint64(sect.VirtualAddress)
textData, _ = sect.Data()
}
if sect := obj.Section(".gosymtab"); sect != nil {
if symtab, err = sect.Data(); err != nil {
return 0, nil, nil, nil, err
}
if pclntab, err = loadPETable(obj, "pclntab", "epclntab"); 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
}
if symtab, err = loadPETable(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")
}
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
}