44 lines
861 B
Rust
44 lines
861 B
Rust
#![feature(start, core_intrinsics, alloc_error_handler, lang_items)]
|
|
#![no_std]
|
|
|
|
extern crate alloc;
|
|
extern crate alloc_system;
|
|
|
|
use alloc::boxed::Box;
|
|
|
|
use alloc_system::System;
|
|
|
|
#[global_allocator]
|
|
static ALLOC: System = System;
|
|
|
|
#[cfg_attr(unix, link(name = "c"))]
|
|
#[cfg_attr(target_env = "msvc", link(name = "msvcrt"))]
|
|
extern "C" {
|
|
fn puts(s: *const u8) -> i32;
|
|
}
|
|
|
|
#[panic_handler]
|
|
fn panic_handler(_: &core::panic::PanicInfo<'_>) -> ! {
|
|
core::intrinsics::abort();
|
|
}
|
|
|
|
#[alloc_error_handler]
|
|
fn alloc_error_handler(_: alloc::alloc::Layout) -> ! {
|
|
core::intrinsics::abort();
|
|
}
|
|
|
|
#[lang = "eh_personality"]
|
|
fn eh_personality() -> ! {
|
|
loop {}
|
|
}
|
|
|
|
#[start]
|
|
fn main(_argc: isize, _argv: *const *const u8) -> isize {
|
|
let world: Box<&str> = Box::new("Hello World!\0");
|
|
unsafe {
|
|
puts(*world as *const str as *const u8);
|
|
}
|
|
|
|
0
|
|
}
|