1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/rust/wasmparser-0.48.2/src/readers/start_section.rs b/third_party/rust/wasmparser-0.48.2/src/readers/start_section.rs
new file mode 100644
index 0000000000..81da40b58f
--- /dev/null
+++ b/third_party/rust/wasmparser-0.48.2/src/readers/start_section.rs
@@ -0,0 +1,28 @@
+/* Copyright 2018 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use super::{BinaryReader, BinaryReaderError, Result};
+
+pub(crate) fn read_start_section_content(data: &[u8], offset: usize) -> Result<u32> {
+    let mut reader = BinaryReader::new_with_offset(data, offset);
+    let start_index = reader.read_var_u32()?;
+    if !reader.eof() {
+        return Err(BinaryReaderError {
+            message: "Unexpected content in the start section",
+            offset: offset + reader.position,
+        });
+    }
+    Ok(start_index)
+}