Add the rust std as a custom sysroot

src/fs.rs

@@ -12,7 +12,7 @@ use io::{IoBase, Read, Seek, Write};
 
 use crate::virtual_fs::{VirtualFileSystem, VirtualNode};
 
-const DISK_ADDR: *const u8 = 0x9000_0000 as *const _;
+const DISK_ADDR: *const u8 = 0xA000_0000 as *const _;
 
 #[derive(Debug)]
 /// Simple disk backend that reads from a fixed memory region.