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pe.go
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pe.go
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// Copyright 2019 The GoRE.tk Authors. All rights reserved.
// Use of this source code is governed by the license that
// can be found in the LICENSE file.
package gore
import (
"debug/gosym"
"debug/pe"
"encoding/binary"
"fmt"
)
func openPE(fp string) (*peFile, error) {
f, err := pe.Open(fp)
if err != nil {
return nil, err
}
return &peFile{file: f}, nil
}
type peFile struct {
file *pe.File
pclntabAddr uint64
imageBase uint64
}
func (p *peFile) getPCLNTab() (*gosym.Table, error) {
addr, pclndat, err := searchFileForPCLNTab(p.file)
if err != nil {
return nil, err
}
pcln := gosym.NewLineTable(pclndat, uint64(p.file.Section(".text").VirtualAddress))
p.pclntabAddr = uint64(addr) + p.imageBase
return gosym.NewTable(make([]byte, 0), pcln)
}
func (p *peFile) Close() error {
return p.file.Close()
}
func (p *peFile) getRData() ([]byte, error) {
section := p.file.Section(".rdata")
if section == nil {
return nil, ErrSectionDoesNotExist
}
return section.Data()
}
func (p *peFile) getCodeSection() ([]byte, error) {
section := p.file.Section(".text")
if section == nil {
return nil, ErrSectionDoesNotExist
}
return section.Data()
}
func (p *peFile) moduledataSection() string {
return ".data"
}
func (p *peFile) getPCLNTABData() (uint64, []byte, error) {
b, d, e := searchFileForPCLNTab(p.file)
return p.imageBase + uint64(b), d, e
}
func (p *peFile) getSectionDataFromOffset(off uint64) (uint64, []byte, error) {
for _, section := range p.file.Sections {
if p.imageBase+uint64(section.VirtualAddress) <= off && off < p.imageBase+uint64(section.VirtualAddress+section.Size) {
data, err := section.Data()
return p.imageBase + uint64(section.VirtualAddress), data, err
}
}
return 0, nil, ErrSectionDoesNotExist
}
func (p *peFile) getSectionData(name string) (uint64, []byte, error) {
section := p.file.Section(name)
if section == nil {
return 0, nil, ErrSectionDoesNotExist
}
data, err := section.Data()
return p.imageBase + uint64(section.VirtualAddress), data, err
}
func (p *peFile) getFileInfo() *FileInfo {
fi := &FileInfo{ByteOrder: binary.LittleEndian, OS: "windows"}
if p.file.Machine == pe.IMAGE_FILE_MACHINE_I386 {
fi.WordSize = intSize32
optHdr := p.file.OptionalHeader.(*pe.OptionalHeader32)
p.imageBase = uint64(optHdr.ImageBase)
} else {
fi.WordSize = intSize64
optHdr := p.file.OptionalHeader.(*pe.OptionalHeader64)
p.imageBase = optHdr.ImageBase
}
return fi
}
func (p *peFile) getBuildID() (string, error) {
data, err := p.getCodeSection()
if err != nil {
return "", fmt.Errorf("failed to get code section: %w", err)
}
return parseBuildIDFromRaw(data)
}