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use crate::read::{Architecture, Error, ReadError, Result};
use crate::{macho, BigEndian, Bytes, Pod};
pub use macho::{FatArch32, FatArch64, FatHeader};
impl FatHeader {
pub fn parse_arch32<'data>(file: &'data [u8]) -> Result<&'data [FatArch32]> {
let mut file = Bytes(file);
let header = file
.read::<FatHeader>()
.read_error("Invalid fat header size or alignment")?;
if header.magic.get(BigEndian) != macho::FAT_MAGIC {
return Err(Error("Invalid 32-bit fat magic"));
}
file.read_slice::<FatArch32>(header.nfat_arch.get(BigEndian) as usize)
.read_error("Invalid nfat_arch")
}
pub fn parse_arch64<'data>(file: &'data [u8]) -> Result<&'data [FatArch64]> {
let mut file = Bytes(file);
let header = file
.read::<FatHeader>()
.read_error("Invalid fat header size or alignment")?;
if header.magic.get(BigEndian) != macho::FAT_MAGIC_64 {
return Err(Error("Invalid 64-bit fat magic"));
}
file.read_slice::<FatArch64>(header.nfat_arch.get(BigEndian) as usize)
.read_error("Invalid nfat_arch")
}
}
#[allow(missing_docs)]
pub trait FatArch: Pod {
type Word: Into<u64>;
fn cputype(&self) -> u32;
fn cpusubtype(&self) -> u32;
fn offset(&self) -> Self::Word;
fn size(&self) -> Self::Word;
fn align(&self) -> u32;
fn architecture(&self) -> Architecture {
match self.cputype() {
macho::CPU_TYPE_ARM => Architecture::Arm,
macho::CPU_TYPE_ARM64 => Architecture::Aarch64,
macho::CPU_TYPE_X86 => Architecture::I386,
macho::CPU_TYPE_X86_64 => Architecture::X86_64,
macho::CPU_TYPE_MIPS => Architecture::Mips,
_ => Architecture::Unknown,
}
}
fn data<'data>(&self, file: &'data [u8]) -> Result<&'data [u8]> {
let offset = self.offset().into();
let size = self.size().into();
let data = Bytes(file)
.read_bytes_at(offset as usize, size as usize)
.read_error("Invalid fat arch offset or size")?;
Ok(data.0)
}
}
impl FatArch for FatArch32 {
type Word = u32;
fn cputype(&self) -> u32 {
self.cputype.get(BigEndian)
}
fn cpusubtype(&self) -> u32 {
self.cpusubtype.get(BigEndian)
}
fn offset(&self) -> Self::Word {
self.offset.get(BigEndian)
}
fn size(&self) -> Self::Word {
self.size.get(BigEndian)
}
fn align(&self) -> u32 {
self.align.get(BigEndian)
}
}
impl FatArch for FatArch64 {
type Word = u64;
fn cputype(&self) -> u32 {
self.cputype.get(BigEndian)
}
fn cpusubtype(&self) -> u32 {
self.cpusubtype.get(BigEndian)
}
fn offset(&self) -> Self::Word {
self.offset.get(BigEndian)
}
fn size(&self) -> Self::Word {
self.size.get(BigEndian)
}
fn align(&self) -> u32 {
self.align.get(BigEndian)
}
}