Run elf files

Cargo.lock

@@ -1046,6 +1046,12 @@ version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
 
+[[package]]
+name = "elf"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55dd888a213fc57e957abf2aa305ee3e8a28dbe05687a251f33b637cd46b0070"
+
 [[package]]
 name = "emath"
 version = "0.32.0"
@@ -1833,6 +1839,7 @@ dependencies = [
  "egui-wgpu",
  "egui-winit",
  "egui_extras",
+ "elf",
  "fixed",
  "gilrs",
  "hex",

Cargo.toml

@@ -21,6 +21,7 @@ egui_extras = { version = "0.32", features = ["image"] }
 egui-notify = "0.20"
 egui-winit = "0.32"
 egui-wgpu = { version = "0.32", features = ["winit"] }
+elf = "0.8"
 fixed = { version = "1.28", features = ["num-traits"] }
 gilrs = { version = "0.11", features = ["serde-serialize"] }
 hex = "0.4"

src/emulator/cart.rs

@@ -18,6 +18,7 @@ pub struct Cart {
 impl Cart {
     pub fn load(file_path: &Path, sim_id: SimId) -> Result<Self> {
         let rom = fs::read(file_path)?;
+        let rom = try_parse_elf(&rom).unwrap_or(rom);
 
         let mut sram_file = File::options()
             .read(true)
@@ -55,6 +56,23 @@ impl Cart {
     }
 }
 
+fn try_parse_elf(data: &[u8]) -> Option<Vec<u8>> {
+    let parsed = elf::ElfBytes::<elf::endian::AnyEndian>::minimal_parse(data).ok()?;
+    let mut bytes = vec![];
+    let mut pstart = None;
+    for phdr in parsed.segments()? {
+        if phdr.p_filesz == 0 {
+            continue;
+        }
+        let start = pstart.unwrap_or(phdr.p_paddr);
+        pstart = Some(start);
+        bytes.resize((phdr.p_paddr - start) as usize, 0);
+        let data = parsed.segment_data(&phdr).ok()?;
+        bytes.extend_from_slice(data);
+    }
+    Some(bytes)
+}
+
 fn sram_path(file_path: &Path, sim_id: SimId) -> PathBuf {
     match sim_id {
         SimId::Player1 => file_path.with_extension("p1.sram"),