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#![feature(naked_functions)]
#![no_std]
#![no_main]
use core::arch::asm;
#[no_mangle]
fn main(_hartid: usize) -> ! {
loop {}
}
#[naked]
#[link_section = ".text.init"]
#[export_name = "_start"]
unsafe extern "C" fn _start() -> ! {
// At boot, the hart is in privilege mode M, mstatus fields MIE
// and MPRV are 0, the pc is set to a reset vector, the mcause
// register specifies why the reset occurred.
// c.f.: [^super::rism2] § 3.4 (Reset)
asm!(
".option push",
".option norelax",
"la gp, __global_pointer$",
".option pop",
"csrr a0, mhartid",
"la sp, _stack_top",
"j main",
options(noreturn)
)
}
#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
loop {}
}
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