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use alloc::borrow::Cow;
use alloc::vec::Vec;
use std::cmp;
use std::slice;
use goblin::pe;
use {
Machine, Object, ObjectSection, ObjectSegment, Relocation, SectionKind, Symbol, SymbolKind,
SymbolMap,
};
#[derive(Debug)]
pub struct PeFile<'data> {
pe: pe::PE<'data>,
data: &'data [u8],
}
#[derive(Debug)]
pub struct PeSegmentIterator<'data, 'file>
where
'data: 'file,
{
file: &'file PeFile<'data>,
iter: slice::Iter<'file, pe::section_table::SectionTable>,
}
#[derive(Debug)]
pub struct PeSegment<'data, 'file>
where
'data: 'file,
{
file: &'file PeFile<'data>,
section: &'file pe::section_table::SectionTable,
}
#[derive(Debug)]
pub struct PeSectionIterator<'data, 'file>
where
'data: 'file,
{
file: &'file PeFile<'data>,
iter: slice::Iter<'file, pe::section_table::SectionTable>,
}
#[derive(Debug)]
pub struct PeSection<'data, 'file>
where
'data: 'file,
{
file: &'file PeFile<'data>,
section: &'file pe::section_table::SectionTable,
}
#[derive(Debug)]
pub struct PeSymbolIterator<'data, 'file>
where
'data: 'file,
{
exports: slice::Iter<'file, pe::export::Export<'data>>,
imports: slice::Iter<'file, pe::import::Import<'data>>,
}
#[derive(Debug)]
pub struct PeRelocationIterator;
impl<'data> PeFile<'data> {
#[inline]
pub fn pe(&self) -> &pe::PE<'data> {
&self.pe
}
pub fn parse(data: &'data [u8]) -> Result<Self, &'static str> {
let pe = pe::PE::parse(data).map_err(|_| "Could not parse PE header")?;
Ok(PeFile { pe, data })
}
}
impl<'data, 'file> Object<'data, 'file> for PeFile<'data>
where
'data: 'file,
{
type Segment = PeSegment<'data, 'file>;
type SegmentIterator = PeSegmentIterator<'data, 'file>;
type Section = PeSection<'data, 'file>;
type SectionIterator = PeSectionIterator<'data, 'file>;
type SymbolIterator = PeSymbolIterator<'data, 'file>;
fn machine(&self) -> Machine {
match self.pe.header.coff_header.machine {
pe::header::COFF_MACHINE_X86 => Machine::X86,
pe::header::COFF_MACHINE_X86_64 => Machine::X86_64,
_ => Machine::Other,
}
}
fn segments(&'file self) -> PeSegmentIterator<'data, 'file> {
PeSegmentIterator {
file: self,
iter: self.pe.sections.iter(),
}
}
fn section_by_name(&'file self, section_name: &str) -> Option<PeSection<'data, 'file>> {
for section in &self.pe.sections {
if let Ok(name) = section.name() {
if name == section_name {
return Some(PeSection {
file: self,
section,
});
}
}
}
None
}
fn sections(&'file self) -> PeSectionIterator<'data, 'file> {
PeSectionIterator {
file: self,
iter: self.pe.sections.iter(),
}
}
fn symbol_by_index(&self, _index: u64) -> Option<Symbol<'data>> {
None
}
fn symbols(&'file self) -> PeSymbolIterator<'data, 'file> {
PeSymbolIterator {
exports: [].iter(),
imports: [].iter(),
}
}
fn dynamic_symbols(&'file self) -> PeSymbolIterator<'data, 'file> {
PeSymbolIterator {
exports: self.pe.exports.iter(),
imports: self.pe.imports.iter(),
}
}
fn symbol_map(&self) -> SymbolMap<'data> {
let mut symbols: Vec<_> = self.symbols().filter(SymbolMap::filter).collect();
symbols.sort_by_key(|x| x.address);
SymbolMap { symbols }
}
#[inline]
fn is_little_endian(&self) -> bool {
true
}
fn has_debug_symbols(&self) -> bool {
for section in &self.pe.sections {
if let Ok(name) = section.name() {
if name == ".debug_info" {
return true;
}
}
}
false
}
fn entry(&self) -> u64 {
self.pe.entry as u64
}
}
impl<'data, 'file> Iterator for PeSegmentIterator<'data, 'file> {
type Item = PeSegment<'data, 'file>;
fn next(&mut self) -> Option<Self::Item> {
self.iter.next().map(|section| PeSegment {
file: self.file,
section,
})
}
}
impl<'data, 'file> ObjectSegment<'data> for PeSegment<'data, 'file> {
#[inline]
fn address(&self) -> u64 {
u64::from(self.section.virtual_address)
}
#[inline]
fn size(&self) -> u64 {
u64::from(self.section.virtual_size)
}
fn data(&self) -> &'data [u8] {
&self.file.data[self.section.pointer_to_raw_data as usize..]
[..self.section.size_of_raw_data as usize]
}
#[inline]
fn name(&self) -> Option<&str> {
self.section.name().ok()
}
}
impl<'data, 'file> Iterator for PeSectionIterator<'data, 'file> {
type Item = PeSection<'data, 'file>;
fn next(&mut self) -> Option<Self::Item> {
self.iter.next().map(|section| PeSection {
file: self.file,
section,
})
}
}
impl<'data, 'file> ObjectSection<'data> for PeSection<'data, 'file> {
type RelocationIterator = PeRelocationIterator;
#[inline]
fn address(&self) -> u64 {
u64::from(self.section.virtual_address)
}
#[inline]
fn size(&self) -> u64 {
u64::from(self.section.virtual_size)
}
fn data(&self) -> Cow<'data, [u8]> {
Cow::from(
&self.file.data[self.section.pointer_to_raw_data as usize..]
[..cmp::min(self.section.virtual_size, self.section.size_of_raw_data) as usize],
)
}
#[inline]
fn uncompressed_data(&self) -> Cow<'data, [u8]> {
self.data()
}
fn name(&self) -> Option<&str> {
self.section.name().ok()
}
#[inline]
fn segment_name(&self) -> Option<&str> {
None
}
#[inline]
fn kind(&self) -> SectionKind {
if self.section.characteristics
& (pe::section_table::IMAGE_SCN_CNT_CODE | pe::section_table::IMAGE_SCN_MEM_EXECUTE)
!= 0
{
SectionKind::Text
} else if self.section.characteristics & pe::section_table::IMAGE_SCN_CNT_INITIALIZED_DATA
!= 0
{
SectionKind::Data
} else if self.section.characteristics & pe::section_table::IMAGE_SCN_CNT_UNINITIALIZED_DATA
!= 0
{
SectionKind::UninitializedData
} else {
SectionKind::Unknown
}
}
fn relocations(&self) -> PeRelocationIterator {
PeRelocationIterator
}
}
impl<'data, 'file> Iterator for PeSymbolIterator<'data, 'file> {
type Item = Symbol<'data>;
fn next(&mut self) -> Option<Self::Item> {
if let Some(export) = self.exports.next() {
return Some(Symbol {
kind: SymbolKind::Unknown,
section_kind: Some(SectionKind::Unknown),
global: true,
name: export.name,
address: export.rva as u64,
size: 0,
});
}
if let Some(import) = self.imports.next() {
let name = match import.name {
Cow::Borrowed(name) => Some(name),
_ => None,
};
return Some(Symbol {
kind: SymbolKind::Unknown,
section_kind: None,
global: true,
name: name,
address: 0,
size: 0,
});
}
None
}
}
impl Iterator for PeRelocationIterator {
type Item = (u64, Relocation);
fn next(&mut self) -> Option<Self::Item> {
None
}
}