Fix reading little-endian .line section

objdiff-core/src/util.rs

@@ -1,6 +1,12 @@
-use std::fmt::{LowerHex, UpperHex};
+use std::{
+    fmt::{LowerHex, UpperHex},
+    io::Read,
+};
 
+use anyhow::Result;
+use byteorder::{NativeEndian, ReadBytesExt};
 use num_traits::PrimInt;
+use object::{Endian, Object};
 
 // https://stackoverflow.com/questions/44711012/how-do-i-format-a-signed-integer-to-a-sign-aware-hexadecimal-representation
 pub(crate) struct ReallySigned<N: PrimInt>(pub(crate) N);
@@ -22,3 +28,11 @@ impl<N: PrimInt> UpperHex for ReallySigned<N> {
         f.pad_integral(num >= 0, prefix, &bare_hex)
     }
 }
+
+pub fn read_u32<R: Read>(obj_file: &object::File, reader: &mut R) -> Result<u32> {
+    Ok(obj_file.endianness().read_u32(reader.read_u32::<NativeEndian>()?))
+}
+
+pub fn read_u16<R: Read>(obj_file: &object::File, reader: &mut R) -> Result<u16> {
+    Ok(obj_file.endianness().read_u16(reader.read_u16::<NativeEndian>()?))
+}