#![no_std] #![no_main] #![feature(global_asm)] #![feature(llvm_asm)] #![feature(panic_info_message)] #[macro_use] mod console; mod lang_items; mod sbi; mod syscall; mod trap; global_asm!(include_str!("entry.asm")); global_asm!(include_str!("link_app.S")); fn clear_bss() { extern "C" { fn sbss(); fn ebss(); } (sbss as usize..ebss as usize).for_each(|a| { unsafe { (a as *mut u8).write_volatile(0) } }); } #[no_mangle] pub fn rust_main() -> ! { clear_bss(); println!("Hello, world!"); extern "C" { fn _num_app(); } let num_app_ptr = _num_app as usize as *const usize; let num_app = unsafe { num_app_ptr.read_volatile() }; println!("num_app = {}", num_app); let app_start: &[usize] = unsafe { core::slice::from_raw_parts(num_app_ptr.add(1), num_app + 1) }; for i in 0..num_app { println!("app_{} [{:#x}, {:#x})", i, app_start[i], app_start[i + 1]); } panic!("Shutdown machine!"); }