linux: larger artifact support (#32)

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libsui"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["the Deno authors"]
 edition = "2021"
 license = "MIT"

lib.rs

@@ -727,10 +727,11 @@ impl<'a> Elf<'a> {
 
         // hash the name to 4 bytes int
         const MAGIC: u32 = 0x501e;
+        const TRAILER_LEN: u64 = 8 + 4 + 4;
 
         elf.extend_from_slice(&MAGIC.to_le_bytes());
         elf.extend_from_slice(&hash(name).to_le_bytes());
-        elf.extend_from_slice(&(sectdata.len() as u32 + 12).to_le_bytes());
+        elf.extend_from_slice(&(sectdata.len() as u64 + TRAILER_LEN).to_le_bytes());
 
         writer.write_all(&elf)?;
         Ok(())
@@ -752,8 +753,9 @@ mod elf {
             return None;
         };
 
-        file.seek(SeekFrom::End(-12)).unwrap();
-        let mut buf = [0; 12];
+        const TRAILER_LEN: i64 = 8 + 4 + 4;
+        file.seek(SeekFrom::End(-TRAILER_LEN)).unwrap();
+        let mut buf = [0; TRAILER_LEN as usize];
         file.read_exact(&mut buf).unwrap();
         let magic = u32::from_le_bytes([buf[0], buf[1], buf[2], buf[3]]);
         if magic != 0x501e {
@@ -766,15 +768,15 @@ mod elf {
             return None;
         }
 
-        let offset = u32::from_le_bytes([buf[8], buf[9], buf[10], buf[11]]) as u64;
+        let offset = u64::from_le_bytes([buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]]) as i64;
 
-        file.seek(SeekFrom::End(-(offset as i64))).unwrap();
+        file.seek(SeekFrom::End(-offset)).unwrap();
 
         // Read section data
         let mut buf = Vec::new();
         file.read_to_end(&mut buf).unwrap();
 
-        let data = buf[..buf.len() - 12].to_vec();
+        let data = buf[..buf.len() - TRAILER_LEN as usize].to_vec();
 
         Some(Box::leak(data.into_boxed_slice()))
     }

tests/integration_test.rs

@@ -63,6 +63,7 @@ fn test_macho(size: usize, sign: bool) {
     let mut out = std::fs::OpenOptions::new()
         .write(true)
         .create(true)
+        .truncate(true)
         .mode(0o755)
         .open(&_path)
         .unwrap();