Beispiel #1
0
// Adapted from src/debug/pe/file.go: pe.(*File).DWARF()
func dwarfFromPE(f *pe.File) (*dwarf.Data, error) {
	// There are many other DWARF sections, but these
	// are the ones the debug/dwarf package uses.
	// Don't bother loading others.
	var names = [...]string{"abbrev", "info", "line", "str"}
	var dat [len(names)][]byte
	for i, name := range names {
		name = ".debug_" + name
		s := f.Section(name)
		if s == nil {
			continue
		}
		b, err := s.Data()
		if err != nil && uint32(len(b)) < s.Size {
			return nil, err
		}
		if 0 < s.VirtualSize && s.VirtualSize < s.Size {
			b = b[:s.VirtualSize]
		}
		dat[i] = b
	}

	abbrev, info, line, str := dat[0], dat[1], dat[2], dat[3]
	return dwarf.New(abbrev, nil, nil, info, line, nil, nil, str)
}
Beispiel #2
0
// DWARF returns the DWARF debug information for the Mach-O file.
func (f *File) DWARF() (*dwarf.Data, error) {
	// There are many other DWARF sections, but these
	// are the required ones, and the debug/dwarf package
	// does not use the others, so don't bother loading them.
	var names = [...]string{"abbrev", "frame", "info", "line", "str"}
	var dat [len(names)][]byte
	for i, name := range names {
		name = "__debug_" + name
		s := f.Section(name)
		if s == nil {
			continue
		}
		b, err := s.Data()
		if err != nil && uint64(len(b)) < s.Size {
			return nil, err
		}
		dat[i] = b
	}

	abbrev, frame, info, line, str := dat[0], dat[1], dat[2], dat[3], dat[4]
	return dwarf.New(abbrev, nil, frame, info, line, nil, nil, str)
}
Beispiel #3
0
func (f *File) DWARF() (*dwarf.Data, error) {
	// There are many other DWARF sections, but these
	// are the required ones, and the debug/dwarf package
	// does not use the others, so don't bother loading them.
	// r: added line.
	var names = [...]string{"abbrev", "frame", "info", "line", "str"}
	var dat [len(names)][]byte
	for i, name := range names {
		name = ".debug_" + name
		s := f.Section(name)
		if s == nil {
			continue
		}
		b, err := s.Data()
		if err != nil && uint64(len(b)) < s.Size {
			return nil, err
		}
		dat[i] = b
	}

	// If there's a relocation table for .debug_info, we have to process it
	// now otherwise the data in .debug_info is invalid for x86-64 objects.
	rela := f.Section(".rela.debug_info")
	if rela != nil && rela.Type == SHT_RELA && f.Machine == EM_X86_64 {
		data, err := rela.Data()
		if err != nil {
			return nil, err
		}
		err = f.applyRelocations(dat[2], data)
		if err != nil {
			return nil, err
		}
	}

	abbrev, frame, info, line, str := dat[0], dat[1], dat[2], dat[3], dat[4]
	d, err := dwarf.New(abbrev, nil, frame, info, line, nil, nil, str)
	if err != nil {
		return nil, err
	}

	// Look for DWARF4 .debug_types sections.
	for i, s := range f.Sections {
		if s.Name == ".debug_types" {
			b, err := s.Data()
			if err != nil && uint64(len(b)) < s.Size {
				return nil, err
			}

			for _, r := range f.Sections {
				if r.Type != SHT_RELA && r.Type != SHT_REL {
					continue
				}
				if int(r.Info) != i {
					continue
				}
				rd, err := r.Data()
				if err != nil {
					return nil, err
				}
				err = f.applyRelocations(b, rd)
				if err != nil {
					return nil, err
				}
			}

			err = d.AddTypes(fmt.Sprintf("types-%d", i), b)
			if err != nil {
				return nil, err
			}
		}
	}

	return d, nil
}