You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.0 KiB
79 lines
2.0 KiB
#![no_std]
|
|
#![feature(llvm_asm)]
|
|
#![feature(linkage)]
|
|
#![feature(panic_info_message)]
|
|
#![feature(alloc_error_handler)]
|
|
|
|
#[macro_use]
|
|
pub mod console;
|
|
mod syscall;
|
|
mod lang_items;
|
|
|
|
extern crate alloc;
|
|
|
|
use syscall::*;
|
|
use buddy_system_allocator::LockedHeap;
|
|
|
|
const USER_HEAP_SIZE: usize = 16384;
|
|
|
|
static mut HEAP_SPACE: [u8; USER_HEAP_SIZE] = [0; USER_HEAP_SIZE];
|
|
|
|
#[global_allocator]
|
|
static HEAP: LockedHeap = LockedHeap::empty();
|
|
|
|
#[alloc_error_handler]
|
|
pub fn handle_alloc_error(layout: core::alloc::Layout) -> ! {
|
|
panic!("Heap allocation error, layout = {:?}", layout);
|
|
}
|
|
|
|
#[no_mangle]
|
|
#[link_section = ".text.entry"]
|
|
pub extern "C" fn _start() -> ! {
|
|
unsafe {
|
|
HEAP.lock()
|
|
.init(HEAP_SPACE.as_ptr() as usize, USER_HEAP_SIZE);
|
|
}
|
|
exit(main());
|
|
}
|
|
|
|
#[linkage = "weak"]
|
|
#[no_mangle]
|
|
fn main() -> i32 {
|
|
panic!("Cannot find main!");
|
|
}
|
|
|
|
pub fn close(fd: usize) -> isize { sys_close(fd) }
|
|
pub fn pipe(pipe_fd: &mut [usize]) -> isize { sys_pipe(pipe_fd) }
|
|
pub fn read(fd: usize, buf: &mut [u8]) -> isize { sys_read(fd, buf) }
|
|
pub fn write(fd: usize, buf: &[u8]) -> isize { sys_write(fd, buf) }
|
|
pub fn exit(exit_code: i32) -> ! { sys_exit(exit_code); }
|
|
pub fn yield_() -> isize { sys_yield() }
|
|
pub fn get_time() -> isize { sys_get_time() }
|
|
pub fn getpid() -> isize { sys_getpid() }
|
|
pub fn fork() -> isize { sys_fork() }
|
|
pub fn exec(path: &str) -> isize { sys_exec(path) }
|
|
pub fn wait(exit_code: &mut i32) -> isize {
|
|
loop {
|
|
match sys_waitpid(-1, exit_code as *mut _) {
|
|
-2 => { yield_(); }
|
|
// -1 or a real pid
|
|
exit_pid => return exit_pid,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn waitpid(pid: usize, exit_code: &mut i32) -> isize {
|
|
loop {
|
|
match sys_waitpid(pid as isize, exit_code as *mut _) {
|
|
-2 => { yield_(); }
|
|
// -1 or a real pid
|
|
exit_pid => return exit_pid,
|
|
}
|
|
}
|
|
}
|
|
pub fn sleep(period_ms: usize) {
|
|
let start = sys_get_time();
|
|
while sys_get_time() < start + period_ms as isize {
|
|
sys_yield();
|
|
}
|
|
} |