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use crate::error;
use scroll::{Pread, Pwrite, SizeWith};
#[repr(C)]
#[derive(Debug, PartialEq, Copy, Clone, Default)]
#[derive(Pread, Pwrite, SizeWith)]
pub struct DataDirectory {
pub virtual_address: u32,
pub size: u32,
}
pub const SIZEOF_DATA_DIRECTORY: usize = 8;
const NUM_DATA_DIRECTORIES: usize = 16;
impl DataDirectory {
pub fn parse(bytes: &[u8], offset: &mut usize) -> error::Result<Self> {
let dd = bytes.gread_with(offset, scroll::LE)?;
Ok (dd)
}
}
#[derive(Debug, PartialEq, Copy, Clone, Default)]
pub struct DataDirectories {
pub data_directories: [Option<DataDirectory>; NUM_DATA_DIRECTORIES],
}
impl DataDirectories {
pub fn parse(bytes: &[u8], count: usize, offset: &mut usize) -> error::Result<Self> {
let mut data_directories = [None; NUM_DATA_DIRECTORIES];
if count > NUM_DATA_DIRECTORIES { return Err (error::Error::Malformed(format!("data directory count ({}) is greater than maximum number of data directories ({})", count, NUM_DATA_DIRECTORIES))) }
for dir in data_directories.iter_mut().take(count) {
let dd = DataDirectory::parse(bytes, offset)?;
let dd = if dd.virtual_address == 0 && dd.size == 0 { None } else { Some (dd) };
*dir = dd;
}
Ok (DataDirectories { data_directories })
}
pub fn get_export_table(&self) -> &Option<DataDirectory> {
let idx = 0;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_import_table(&self) -> &Option<DataDirectory> {
let idx = 1;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_resource_table(&self) -> &Option<DataDirectory> {
let idx = 2;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_exception_table(&self) -> &Option<DataDirectory> {
let idx = 3;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_certificate_table(&self) -> &Option<DataDirectory> {
let idx = 4;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_base_relocation_table(&self) -> &Option<DataDirectory> {
let idx = 5;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_debug_table(&self) -> &Option<DataDirectory> {
let idx = 6;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_architecture(&self) -> &Option<DataDirectory> {
let idx = 7;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_global_ptr(&self) -> &Option<DataDirectory> {
let idx = 8;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_tls_table(&self) -> &Option<DataDirectory> {
let idx = 9;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_load_config_table(&self) -> &Option<DataDirectory> {
let idx = 10;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_bound_import_table(&self) -> &Option<DataDirectory> {
let idx = 11;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_import_address_table(&self) -> &Option<DataDirectory> {
let idx = 12;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_delay_import_descriptor(&self) -> &Option<DataDirectory> {
let idx = 13;
unsafe { self.data_directories.get_unchecked(idx) }
}
pub fn get_clr_runtime_header(&self) -> &Option<DataDirectory> {
let idx = 14;
unsafe { self.data_directories.get_unchecked(idx) }
}
}
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