Jeremy Soller
57 lines
957 B
Rust
57 lines
957 B
Rust
//! crt0
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#![no_std]
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#![feature(asm)]
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#![feature(lang_items)]
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#![feature(naked_functions)]
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extern crate platform;
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use platform::types::*;
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#[no_mangle]
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#[naked]
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pub unsafe extern "C" fn _start() {
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asm!("mov rdi, rsp
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call _start_rust"
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:
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:
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:
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: "intel", "volatile"
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);
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}
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#[repr(C)]
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pub struct Stack {
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argc: isize,
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argv0: *const u8,
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}
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impl Stack {
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fn argc(&self) -> isize {
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self.argc
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}
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fn argv(&self) -> *const *const u8 {
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&self.argv0 as *const *const u8
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}
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}
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#[inline(never)]
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#[no_mangle]
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pub unsafe extern "C" fn _start_rust(sp: &'static Stack) -> ! {
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extern "C" {
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fn main(argc: isize, argv: *const *const u8) -> c_int;
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}
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let argc = sp.argc();
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let argv = sp.argv();
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platform::exit(main(argc, argv));
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}
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#[lang = "panic_fmt"]
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pub extern "C" fn rust_begin_unwind(_fmt: ::core::fmt::Arguments, _file: &str, _line: u32) -> ! {
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loop {}
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}
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