🚧 Rust hello example

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["bin", "crates/*"]
+members = ["bin", "crates/*", "example/*-rs"]
 resolver = "2"
 
 [workspace.package]

crates/mipsevm/src/mips/instrumented.rs

@@ -227,6 +227,40 @@ mod test {
         }
     }
 
+    #[test]
+    #[ignore]
+    fn test_hello_rs() {
+        let elf_bytes = include_bytes!("../../../../example/bin/hello-rs.elf");
+        let mut state = load_elf(elf_bytes).unwrap();
+        // patch::patch_go(elf_bytes, &mut state).unwrap();
+        patch::patch_stack(&mut state).unwrap();
+
+        let out = BufWriter::new(Vec::default());
+        let err = BufWriter::new(Vec::default());
+        let mut ins =
+            InstrumentedState::new(state, StaticOracle::new(b"hello world".to_vec()), out, err);
+
+        for i in 0..400_000 {
+            if ins.state.exited {
+                break;
+            }
+            dbg!(i);
+            ins.step(false).unwrap();
+        }
+
+        assert!(ins.state.exited, "must exit");
+        assert_eq!(ins.state.exit_code, 0, "must exit with 0");
+
+        assert_eq!(
+            String::from_utf8(ins.std_out.buffer().to_vec()).unwrap(),
+            "hello world!\n"
+        );
+        assert_eq!(
+            String::from_utf8(ins.std_err.buffer().to_vec()).unwrap(),
+            ""
+        );
+    }
+
     #[test]
     fn test_hello() {
         let elf_bytes = include_bytes!("../../../../example/bin/hello.elf");

example/Makefile

@@ -1,11 +1,17 @@
-all: elf dump
+all: elf dump ex-rs
 
 .PHONY: elf
 elf: $(patsubst %/go.mod,bin/%.elf,$(wildcard */go.mod))
 
 .PHONY: dump
 dump: $(patsubst %/go.mod,bin/%.dump,$(wildcard */go.mod))
 
+.PHONY: ex-rs
+ex-rs:
+	cd hello-rs && \
+		RUSTFLAGS='-C link-arg=-no-pie -C target-feature=+mips32,+crt-static,-mips32r2,-fpxx,-nooddspreg' cross build --release --target mips-unknown-linux-musl && \
+		cp ../../target/mips-unknown-linux-musl/release/hello-rs ../bin/hello-rs.elf
+
 bin:
 	mkdir bin
 

example/hello-rs/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "hello-rs"
+edition = "2021"
+version.workspace = true
+authors.workspace = true
+
+[dependencies]
+# no deps

example/hello-rs/src/main.rs

@@ -0,0 +1,5 @@
+use std::io::{self, Write};
+
+fn main() {
+    let _ = io::stdout().write_all(b"hello world!\n");
+}