ADD ELF SUPPORT

src/main.rs

@@ -22,25 +22,7 @@ use anyhow::{Result, bail};
 
 use crate::basic_uart::BasicUart;
 
-fn read_file_to_buffer(path: &str, buffer: &mut [u8]) -> io::Result<usize> {
-    let mut file = File::open(path)?;
-    let mut total_read = 0;
-
-    while total_read < buffer.len() {
-        let n = file.read(&mut buffer[total_read..])?;
-        if n == 0 {
-            return Ok(total_read);
-        }
-        total_read += n;
-    }
-
-    let mut tmp = [0u8; 1];
-    if file.read(&mut tmp)? != 0 {
-        return Err(io::Error::other("RAM too small for file"));
-    }
-
-    Ok(total_read)
-}
+mod execload;
 
 fn main() -> Result<()> {
     let mut ram = Ram::try_new(16 * 1024 * 1024 / 4096)?;
@@ -53,7 +35,7 @@ fn main() -> Result<()> {
         bail!("Wrong number of arguments");
     }
 
-    read_file_to_buffer(&args[1], buf)?;
+    let entry_point = execload::load(&args[1], buf, 0x8000_0000)?;
 
     let uart = BasicUart::new();
     let uart = uart.spawn_poller(Duration::from_millis(10));
@@ -76,7 +58,7 @@ fn main() -> Result<()> {
     };
 
     let mut core = Core::new(mem_cfg);
-    core.reset(0x8000_0000);
+    core.reset(entry_point);
     core.run();
 
     Ok(())