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use alloc::vec::Vec;
use core::str;
use crate::read::{
self, Architecture, FileFlags, Object, ObjectSection, ReadError, Result, SectionIndex, Symbol,
SymbolIndex, SymbolMap,
};
use crate::{pe, Bytes, LittleEndian as LE};
use super::{
parse_symbol, CoffSection, CoffSectionIterator, CoffSegment, CoffSegmentIterator,
CoffSymbolIterator, SectionTable, SymbolTable,
};
#[derive(Debug)]
pub struct CoffFile<'data> {
pub(super) header: &'data pe::ImageFileHeader,
pub(super) sections: SectionTable<'data>,
pub(super) symbols: SymbolTable<'data>,
pub(super) data: Bytes<'data>,
}
impl<'data> CoffFile<'data> {
pub fn parse(data: &'data [u8]) -> Result<Self> {
let data = Bytes(data);
let (header, tail) = pe::ImageFileHeader::parse(data)?;
let sections = header.sections(tail)?;
let symbols = header.symbols(data)?;
Ok(CoffFile {
header,
sections,
symbols,
data,
})
}
}
impl<'data> read::private::Sealed for CoffFile<'data> {}
impl<'data, 'file> Object<'data, 'file> for CoffFile<'data>
where
'data: 'file,
{
type Segment = CoffSegment<'data, 'file>;
type SegmentIterator = CoffSegmentIterator<'data, 'file>;
type Section = CoffSection<'data, 'file>;
type SectionIterator = CoffSectionIterator<'data, 'file>;
type SymbolIterator = CoffSymbolIterator<'data, 'file>;
fn architecture(&self) -> Architecture {
match self.header.machine.get(LE) {
pe::IMAGE_FILE_MACHINE_I386 => Architecture::I386,
pe::IMAGE_FILE_MACHINE_AMD64 => Architecture::X86_64,
_ => Architecture::Unknown,
}
}
#[inline]
fn is_little_endian(&self) -> bool {
true
}
#[inline]
fn is_64(&self) -> bool {
false
}
fn segments(&'file self) -> CoffSegmentIterator<'data, 'file> {
CoffSegmentIterator {
file: self,
iter: self.sections.iter(),
}
}
fn section_by_name(&'file self, section_name: &str) -> Option<CoffSection<'data, 'file>> {
self.sections()
.find(|section| section.name() == Ok(section_name))
}
fn section_by_index(&'file self, index: SectionIndex) -> Result<CoffSection<'data, 'file>> {
let section = self.sections.section(index.0)?;
Ok(CoffSection {
file: self,
index,
section,
})
}
fn sections(&'file self) -> CoffSectionIterator<'data, 'file> {
CoffSectionIterator {
file: self,
iter: self.sections.iter().enumerate(),
}
}
fn symbol_by_index(&self, index: SymbolIndex) -> Result<Symbol<'data>> {
let symbol = self
.symbols
.get(index.0)
.read_error("Invalid COFF symbol index")?;
Ok(parse_symbol(&self.symbols, index.0, symbol))
}
fn symbols(&'file self) -> CoffSymbolIterator<'data, 'file> {
CoffSymbolIterator {
symbols: &self.symbols,
index: 0,
}
}
fn dynamic_symbols(&'file self) -> CoffSymbolIterator<'data, 'file> {
CoffSymbolIterator {
symbols: &self.symbols,
index: self.symbols.len(),
}
}
fn symbol_map(&self) -> SymbolMap<'data> {
let mut symbols: Vec<_> = self
.symbols()
.map(|(_, s)| s)
.filter(SymbolMap::filter)
.collect();
symbols.sort_by_key(|x| x.address);
SymbolMap { symbols }
}
fn has_debug_symbols(&self) -> bool {
self.section_by_name(".debug_info").is_some()
}
#[inline]
fn entry(&self) -> u64 {
0
}
fn flags(&self) -> FileFlags {
FileFlags::Coff {
characteristics: self.header.characteristics.get(LE),
}
}
}
impl pe::ImageFileHeader {
pub fn parse<'data>(mut data: Bytes<'data>) -> read::Result<(&'data Self, Bytes<'data>)> {
let header = data
.read::<pe::ImageFileHeader>()
.read_error("Invalid COFF file header size or alignment")?;
data.skip(header.size_of_optional_header.get(LE) as usize)
.read_error("Invalid COFF optional header size")?;
Ok((header, data))
}
#[inline]
fn sections<'data>(&self, tail: Bytes<'data>) -> read::Result<SectionTable<'data>> {
SectionTable::parse(self, tail)
}
#[inline]
fn symbols<'data>(&self, data: Bytes<'data>) -> read::Result<SymbolTable<'data>> {
SymbolTable::parse(self, data)
}
}