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#![feature(start, core_intrinsics, alloc_error_handler, lang_items)]
#![no_std]
#![allow(internal_features)]
extern crate alloc;
extern crate alloc_system;
use alloc::boxed::Box;
use alloc_system::System;
#[global_allocator]
static ALLOC: System = System;
#[link(name = "c")]
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 {}
}
#[no_mangle]
unsafe extern "C" fn _Unwind_Resume() {
core::intrinsics::unreachable();
}
#[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
}
|
