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debug/pe, cgo: add windows support

Browse Source 
R=rsc, mattn
CC=golang-dev
https://golang.org/cl/1976045
This commit is contained in:
Wei Guangjing 2010-11-01 17:52:26 -04:00 committed by Russ Cox
parent e198a5086a
commit 035696c59a
10 changed files with 407 additions and 1 deletions
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1
src/Make.pkg
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@ -141,6 +141,7 @@ _CGO_CFLAGS_amd64=-m64
_CGO_LDFLAGS_freebsd=-shared -lpthread -lm
_CGO_LDFLAGS_linux=-shared -lpthread -lm
_CGO_LDFLAGS_darwin=-dynamiclib -Wl,-undefined,dynamic_lookup
_CGO_LDFLAGS_windows=-shared -lm -mthreads
# Compile x.cgo4.c with gcc to make package_x.so.

5
src/cmd/cgo/gcc.go
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@ -12,6 +12,7 @@ import (
"debug/dwarf"
"debug/elf"
"debug/macho"
"debug/pe"
"flag"
"fmt"
"go/ast"
@ -504,7 +505,9 @@ func (p *Package) gccDebug(stdin []byte) *dwarf.Data {
var err os.Error
if f, err = elf.Open(gccTmp); err != nil {
if f, err = macho.Open(gccTmp); err != nil {
fatal("cannot parse gcc output %s as ELF or Mach-O object", gccTmp)
if f, err = pe.Open(gccTmp); err != nil {
fatal("cannot parse gcc output %s as ELF or Mach-O or PE object", gccTmp)
}
}
}

1
src/pkg/Makefile
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@ -50,6 +50,7 @@ DIRS=\
debug/macho\
debug/elf\
debug/gosym\
debug/pe\
debug/proc\
ebnf\
encoding/ascii85\

12
src/pkg/debug/pe/Makefile Normal file
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@ -0,0 +1,12 @@
# Copyright 2009 The Go Authors. All rights reserved.
# Use of this source code is governed by a BSD-style
# license that can be found in the LICENSE file.
include ../../../Make.inc
TARG=debug/pe
GOFILES=\
pe.go\
file.go\
include ../../../Make.pkg

231
src/pkg/debug/pe/file.go Normal file
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@ -0,0 +1,231 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package pe implements access to PE (Microsoft Windows Portable Executable) files.
package pe
import (
"debug/dwarf"
"encoding/binary"
"fmt"
"io"
"os"
"strconv"
)
// A File represents an open PE file.
type File struct {
FileHeader
Sections []*Section
closer io.Closer
}
type SectionHeader struct {
Name string
VirtualSize uint32
VirtualAddress uint32
Size uint32
Offset uint32
PointerToRelocations uint32
PointerToLineNumbers uint32
NumberOfRelocations uint16
NumberOfLineNumbers uint16
Characteristics uint32
}
type Section struct {
SectionHeader
// Embed ReaderAt for ReadAt method.
// Do not embed SectionReader directly
// to avoid having Read and Seek.
// If a client wants Read and Seek it must use
// Open() to avoid fighting over the seek offset
// with other clients.
io.ReaderAt
sr *io.SectionReader
}
// Data reads and returns the contents of the PE section.
func (s *Section) Data() ([]byte, os.Error) {
dat := make([]byte, s.sr.Size())
n, err := s.sr.ReadAt(dat, 0)
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) }
type FormatError struct {
off int64
msg string
val interface{}
}
func (e *FormatError) String() string {
msg := e.msg
if e.val != nil {
msg += fmt.Sprintf(" '%v'", e.val)
}
msg += fmt.Sprintf(" in record at byte %#x", e.off)
return msg
}
// Open opens the named file using os.Open and prepares it for use as a PE binary.
func Open(name string) (*File, os.Error) {
f, err := os.Open(name, os.O_RDONLY, 0)
if err != nil {
return nil, err
}
ff, err := NewFile(f)
if err != nil {
f.Close()
return nil, err
}
ff.closer = f
return ff, nil
}
// Close closes the File.
// If the File was created using NewFile directly instead of Open,
// Close has no effect.
func (f *File) Close() os.Error {
var err os.Error
if f.closer != nil {
err = f.closer.Close()
f.closer = nil
}
return err
}
// NewFile creates a new File for acecssing a PE binary in an underlying reader.
func NewFile(r io.ReaderAt) (*File, os.Error) {
f := new(File)
sr := io.NewSectionReader(r, 0, 1<<63-1)
var dosheader [96]byte
if _, err := r.ReadAt(dosheader[0:], 0); err != nil {
return nil, err
}
var base int64
if dosheader[0] == 'M' && dosheader[1] == 'Z' {
var sign [4]byte
r.ReadAt(sign[0:], int64(dosheader[0x3c]))
if !(sign[0] == 'P' && sign[1] == 'E' && sign[2] == 0 && sign[3] == 0) {
return nil, os.NewError("Invalid PE File Format.")
}
base = int64(dosheader[0x3c]) + 4
} else {
base = int64(0)
}
sr.Seek(base, 0)
if err := binary.Read(sr, binary.LittleEndian, &f.FileHeader); err != nil {
return nil, err
}
if f.FileHeader.Machine != IMAGE_FILE_MACHINE_UNKNOWN && f.FileHeader.Machine != IMAGE_FILE_MACHINE_AMD64 && f.FileHeader.Machine != IMAGE_FILE_MACHINE_I386 {
return nil, os.NewError("Invalid PE File Format.")
}
// get symbol string table
sr.Seek(int64(f.FileHeader.PointerToSymbolTable+18*f.FileHeader.NumberOfSymbols), 0)
var l uint32
if err := binary.Read(sr, binary.LittleEndian, &l); err != nil {
return nil, err
}
ss := make([]byte, l)
if _, err := r.ReadAt(ss, int64(f.FileHeader.PointerToSymbolTable+18*f.FileHeader.NumberOfSymbols)); err != nil {
return nil, err
}
sr.Seek(base, 0)
binary.Read(sr, binary.LittleEndian, &f.FileHeader)
sr.Seek(int64(f.FileHeader.SizeOfOptionalHeader), 1) //Skip OptionalHeader
f.Sections = make([]*Section, f.FileHeader.NumberOfSections)
for i := 0; i < int(f.FileHeader.NumberOfSections); i++ {
sh := new(SectionHeader32)
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:])
}
s := new(Section)
s.SectionHeader = SectionHeader{
Name: name,
VirtualSize: uint32(sh.VirtualSize),
VirtualAddress: uint32(sh.VirtualAddress),
Size: uint32(sh.SizeOfRawData),
Offset: uint32(sh.PointerToRawData),
PointerToRelocations: uint32(sh.PointerToRelocations),
PointerToLineNumbers: uint32(sh.PointerToLineNumbers),
NumberOfRelocations: uint16(sh.NumberOfRelocations),
NumberOfLineNumbers: uint16(sh.NumberOfLineNumbers),
Characteristics: uint32(sh.Characteristics),
}
s.sr = io.NewSectionReader(r, int64(s.SectionHeader.Offset), int64(s.SectionHeader.Size))
s.ReaderAt = s.sr
f.Sections[i] = s
}
return f, nil
}
func cstring(b []byte) string {
var i int
for i = 0; i < len(b) && b[i] != 0; i++ {
}
return string(b[0:i])
}
// getString extracts a string from symbol string table.
func getString(section []byte, start int) (string, bool) {
if start < 0 || start >= len(section) {
return "", false
}
for end := start; end < len(section); end++ {
if section[end] == 0 {
return string(section[start:end]), true
}
}
return "", false
}
// Section returns the first section with the given name, or nil if no such
// section exists.
func (f *File) Section(name string) *Section {
for _, s := range f.Sections {
if s.Name == name {
return s
}
}
return nil
}
func (f *File) DWARF() (*dwarf.Data, os.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", "info", "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
}
dat[i] = b
}
abbrev, info, str := dat[0], dat[1], dat[2]
return dwarf.New(abbrev, nil, nil, info, nil, nil, nil, str)
}

99
src/pkg/debug/pe/file_test.go Normal file
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@ -0,0 +1,99 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pe
import (
"reflect"
"testing"
)
type fileTest struct {
file string
hdr FileHeader
sections []*SectionHeader
}
var fileTests = []fileTest{
fileTest{
"testdata/gcc-386-mingw-obj",
FileHeader{0x014c, 0x000c, 0x0, 0x64a, 0x1e, 0x0, 0x104},
[]*SectionHeader{
&SectionHeader{".text", 0, 0, 36, 500, 1440, 0, 3, 0, 0x60300020},
&SectionHeader{".data", 0, 0, 0, 0, 0, 0, 0, 0, 3224371264},
&SectionHeader{".bss", 0, 0, 0, 0, 0, 0, 0, 0, 3224371328},
&SectionHeader{".debug_abbrev", 0, 0, 137, 536, 0, 0, 0, 0, 0x42100000},
&SectionHeader{".debug_info", 0, 0, 418, 673, 1470, 0, 7, 0, 1108344832},
&SectionHeader{".debug_line", 0, 0, 128, 1091, 1540, 0, 1, 0, 1108344832},
&SectionHeader{".rdata", 0, 0, 16, 1219, 0, 0, 0, 0, 1076887616},
&SectionHeader{".debug_frame", 0, 0, 52, 1235, 1550, 0, 2, 0, 1110441984},
&SectionHeader{".debug_loc", 0, 0, 56, 1287, 0, 0, 0, 0, 1108344832},
&SectionHeader{".debug_pubnames", 0, 0, 27, 1343, 1570, 0, 1, 0, 1108344832},
&SectionHeader{".debug_pubtypes", 0, 0, 38, 1370, 1580, 0, 1, 0, 1108344832},
&SectionHeader{".debug_aranges", 0, 0, 32, 1408, 1590, 0, 2, 0, 1108344832},
},
},
fileTest{
"testdata/gcc-386-mingw-exec",
FileHeader{0x014c, 0x000f, 0x4c6a1b60, 0x3c00, 0x282, 0xe0, 0x107},
[]*SectionHeader{
&SectionHeader{Name: ".text", VirtualSize: 0xcd8, VirtualAddress: 0x1000, Size: 0xe00, Offset: 0x400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x60500060},
&SectionHeader{Name: ".data", VirtualSize: 0x10, VirtualAddress: 0x2000, Size: 0x200, Offset: 0x1200, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0300040},
&SectionHeader{Name: ".rdata", VirtualSize: 0x120, VirtualAddress: 0x3000, Size: 0x200, Offset: 0x1400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x40300040},
&SectionHeader{Name: ".bss", VirtualSize: 0xdc, VirtualAddress: 0x4000, Size: 0x0, Offset: 0x0, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0400080},
&SectionHeader{Name: ".idata", VirtualSize: 0x3c8, VirtualAddress: 0x5000, Size: 0x400, Offset: 0x1600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0300040},
&SectionHeader{Name: ".CRT", VirtualSize: 0x18, VirtualAddress: 0x6000, Size: 0x200, Offset: 0x1a00, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0300040},
&SectionHeader{Name: ".tls", VirtualSize: 0x20, VirtualAddress: 0x7000, Size: 0x200, Offset: 0x1c00, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0xc0300040},
&SectionHeader{Name: ".debug_aranges", VirtualSize: 0x20, VirtualAddress: 0x8000, Size: 0x200, Offset: 0x1e00, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_pubnames", VirtualSize: 0x51, VirtualAddress: 0x9000, Size: 0x200, Offset: 0x2000, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_pubtypes", VirtualSize: 0x91, VirtualAddress: 0xa000, Size: 0x200, Offset: 0x2200, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_info", VirtualSize: 0xe22, VirtualAddress: 0xb000, Size: 0x1000, Offset: 0x2400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_abbrev", VirtualSize: 0x157, VirtualAddress: 0xc000, Size: 0x200, Offset: 0x3400, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_line", VirtualSize: 0x144, VirtualAddress: 0xd000, Size: 0x200, Offset: 0x3600, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
&SectionHeader{Name: ".debug_frame", VirtualSize: 0x34, VirtualAddress: 0xe000, Size: 0x200, Offset: 0x3800, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42300000},
&SectionHeader{Name: ".debug_loc", VirtualSize: 0x38, VirtualAddress: 0xf000, Size: 0x200, Offset: 0x3a00, PointerToRelocations: 0x0, PointerToLineNumbers: 0x0, NumberOfRelocations: 0x0, NumberOfLineNumbers: 0x0, Characteristics: 0x42100000},
},
},
}
func TestOpen(t *testing.T) {
for i := range fileTests {
tt := &fileTests[i]
f, err := Open(tt.file)
if err != nil {
t.Error(err)
continue
}
if !reflect.DeepEqual(f.FileHeader, tt.hdr) {
t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr)
continue
}
for i, sh := range f.Sections {
if i >= len(tt.sections) {
break
}
have := &sh.SectionHeader
want := tt.sections[i]
if !reflect.DeepEqual(have, want) {
t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
}
}
tn := len(tt.sections)
fn := len(f.Sections)
if tn != fn {
t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn)
}
}
}
func TestOpenFailure(t *testing.T) {
filename := "file.go" // not a PE file
_, err := Open(filename) // don't crash
if err == nil {
t.Errorf("open %s: succeeded unexpectedly", filename)
}
}

51
src/pkg/debug/pe/pe.go Normal file
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@ -0,0 +1,51 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pe
type FileHeader struct {
Machine uint16
NumberOfSections uint16
TimeDateStamp uint32
PointerToSymbolTable uint32
NumberOfSymbols uint32
SizeOfOptionalHeader uint16
Characteristics uint16
}
type SectionHeader32 struct {
Name [8]uint8
VirtualSize uint32
VirtualAddress uint32
SizeOfRawData uint32
PointerToRawData uint32
PointerToRelocations uint32
PointerToLineNumbers uint32
NumberOfRelocations uint16
NumberOfLineNumbers uint16
Characteristics uint32
}
const (
IMAGE_FILE_MACHINE_UNKNOWN = 0x0
IMAGE_FILE_MACHINE_AM33 = 0x1d3
IMAGE_FILE_MACHINE_AMD64 = 0x8664
IMAGE_FILE_MACHINE_ARM = 0x1c0
IMAGE_FILE_MACHINE_EBC = 0xebc
IMAGE_FILE_MACHINE_I386 = 0x14c
IMAGE_FILE_MACHINE_IA64 = 0x200
IMAGE_FILE_MACHINE_M32R = 0x9041
IMAGE_FILE_MACHINE_MIPS16 = 0x266
IMAGE_FILE_MACHINE_MIPSFPU = 0x366
IMAGE_FILE_MACHINE_MIPSFPU16 = 0x466
IMAGE_FILE_MACHINE_POWERPC = 0x1f0
IMAGE_FILE_MACHINE_POWERPCFP = 0x1f1
IMAGE_FILE_MACHINE_R4000 = 0x166
IMAGE_FILE_MACHINE_SH3 = 0x1a2
IMAGE_FILE_MACHINE_SH3DSP = 0x1a3
IMAGE_FILE_MACHINE_SH4 = 0x1a6
IMAGE_FILE_MACHINE_SH5 = 0x1a8
IMAGE_FILE_MACHINE_THUMB = 0x1c2
IMAGE_FILE_MACHINE_WCEMIPSV2 = 0x169
)

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src/pkg/debug/pe/testdata/gcc-386-mingw-exec vendored Normal file
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src/pkg/debug/pe/testdata/gcc-386-mingw-obj vendored Normal file
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8
src/pkg/debug/pe/testdata/hello.c vendored Normal file
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@ -0,0 +1,8 @@
#include <stdio.h>
int
main(void)
{
printf("hello, world\n");
return 0;
}