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68 lines
1.6 KiB
Rust
68 lines
1.6 KiB
Rust
#![feature(panic_info_message)]
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#![feature(alloc_error_handler)]
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#![no_std]
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#![no_main]
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extern crate alloc;
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use core::arch::global_asm;
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use sbi::{console_put_char, shutdown};
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use lang_items::console;
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pub mod lang_items;
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pub mod sbi;
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pub mod sync;
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pub mod trap;
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pub mod syscall;
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pub mod loader;
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pub mod config;
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pub mod task;
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pub mod timer;
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pub mod mm;
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#[path = "boards/qemu.rs"]
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mod board;
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// 汇编脚本引入, 调整内核的内存布局之后, 会跳入到 rust_main中执行
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global_asm!(include_str!("entry.asm"));
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// 引入用户的二进制文件
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global_asm!(include_str!("link_app.S"));
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extern "C" {
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fn stext();
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fn etext();
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fn sbss();
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fn ebss();
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fn boot_stack_top_bound();
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fn boot_stack_lower_bound();
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}
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#[no_mangle]
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pub fn rust_main(){
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init_bss();
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println!("stext: {:#x}, etext: {:#x}", stext as usize, etext as usize);
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println!("sbss: {:#x}, ebss: {:#x}", sbss as usize, ebss as usize);
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println!("boot_stack_top_bound: {:#x}, boot_stack_lower_bound: {:#x}", boot_stack_top_bound as usize, boot_stack_lower_bound as usize);
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// 初始化动态内存分配器, 使我们能在内核中使用动态大小数据类型
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mm::init();
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trap::init();
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trap::enable_timer_interrupt(); // 允许定时器中断
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timer::set_next_trigger(); // 在进入用户态之前, 设置一个时钟中断, 防止第一个用户任务死循环
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task::run_first_task();
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panic!("Disable run here")
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}
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/// ## 初始化bss段
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///
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fn init_bss() {
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unsafe {
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(sbss as usize..ebss as usize).for_each(|p| (p as *mut u8).write_unaligned(0))
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}
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}
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