1 files changed, 31 insertions, 0 deletions
diff --git a/third_party/rust/goblin/examples/scroll.rs b/third_party/rust/goblin/examples/scroll.rs
new file mode 100644
index 0000000000..a0f7beb61e
--- /dev/null
+++ b/third_party/rust/goblin/examples/scroll.rs
@@ -0,0 +1,31 @@
+/// Demonstrates the magical powers of scroll + goblin
+/// Goblin implements `TryFromCtx` for the header type
+/// which means downstream crates/clients can just "parse" headers out of
+/// arbitrary buffers, without learning new crate specific function names
+/// I.e., all you need are Types + Pread = Happiness
+
+use goblin::{error, elf64, elf};
+use scroll::{Pwrite, Pread};
+
+fn run () -> error::Result<()> {
+    let crt1: Vec<u8> = include!("../etc/crt1.rs");
+    let header: elf64::header::Header = crt1.pread(0)?;
+    assert_eq!(header.e_type, elf64::header::ET_REL);
+    println!("header: {:?}", &header);
+    // now lets write the header into some bytes
+    let mut bytes = [0u8; elf64::header::SIZEOF_EHDR];
+    bytes.pwrite(header, 0)?;
+    // read it back out
+    let header2: elf64::header::Header = bytes.pread(0)?;
+    // they're the same
+    assert_eq!(header, header2);
+    let elf: elf::Elf = crt1.pread(0)?;
+    println!("elf: {:#?}", &elf);
+    let elf = elf::Elf::parse(&crt1)?;
+    println!("elf: {:#?}", &elf);
+    Ok(())
+}
+
+fn main() {
+    run().unwrap();
+}