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debug/pe: pretty section.go code

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Introduce (*SectionHeader32).fullName and add documentation comments.

Updates #15345

Change-Id: I8f3b8ab9492642d62e7aad010c91c68daea3f14b
Reviewed-on: https://go-review.googlesource.com/22301
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Alex Brainman 2016-04-20 15:58:55 +10:00
parent 75b886ab79
commit 285a18436d
2 changed files with 27 additions and 10 deletions
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10
src/debug/pe/file.go
View File

@ -12,7 +12,6 @@ import (
"fmt"
"io"
"os"
"strconv"
)
// A File represents an open PE file.
@ -172,12 +171,9 @@ func NewFile(r io.ReaderAt) (*File, error) {
if err := binary.Read(sr, binary.LittleEndian, sh); err != nil {
return nil, err
}
var name string
if sh.Name[0] == '\x2F' {
si, _ := strconv.Atoi(cstring(sh.Name[1:]))
name, _ = getString(ss, si)
} else {
name = cstring(sh.Name[0:])
name, err := sh.fullName(f.StringTable)
if err != nil {
return nil, err
}
s := new(Section)
s.SectionHeader = SectionHeader{

27
src/debug/pe/section.go
View File

@ -6,8 +6,10 @@ package pe
import (
"io"
"strconv"
)
// SectionHeader32 represents real PE COFF section header.
type SectionHeader32 struct {
Name [8]uint8
VirtualSize uint32
@ -21,6 +23,22 @@ type SectionHeader32 struct {
Characteristics uint32
}
// fullName finds real name of section sh. Normally name is stored
// in sh.Name, but if it is longer then 8 characters, it is stored
// in COFF string table st instead.
func (sh *SectionHeader32) fullName(st StringTable) (string, error) {
if sh.Name[0] != '/' {
return cstring(sh.Name[:]), nil
}
i, err := strconv.Atoi(cstring(sh.Name[1:]))
if err != nil {
return "", err
}
return st.String(uint32(i))
}
// SectionHeader is similar to SectionHeader32 with Name
// field replaced by Go string.
type SectionHeader struct {
Name string
VirtualSize uint32
@ -34,6 +52,7 @@ type SectionHeader struct {
Characteristics uint32
}
// Section provides access to PE COFF section.
type Section struct {
SectionHeader
@ -47,7 +66,7 @@ type Section struct {
sr *io.SectionReader
}
// Data reads and returns the contents of the PE section.
// Data reads and returns the contents of the PE section s.
func (s *Section) Data() ([]byte, error) {
dat := make([]byte, s.sr.Size())
n, err := s.sr.ReadAt(dat, 0)
@ -57,5 +76,7 @@ func (s *Section) Data() ([]byte, error) {
return dat[0:n], err
}
// Open returns a new ReadSeeker reading the PE section.
func (s *Section) Open() io.ReadSeeker { return io.NewSectionReader(s.sr, 0, 1<<63-1) }
// Open returns a new ReadSeeker reading the PE section s.
func (s *Section) Open() io.ReadSeeker {
return io.NewSectionReader(s.sr, 0, 1<<63-1)
}