82 lines
2.4 KiB
Rust
82 lines
2.4 KiB
Rust
#![no_std] // 不链接 Rust 标准库
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#![no_main] // 禁用 main 入口点，因为没有运行时
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#![feature(custom_test_frameworks)]
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#![test_runner(anos::test_runner)]
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#![reexport_test_harness_main = "test_main"]
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extern crate alloc;
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use alloc::{boxed::Box, rc::Rc, vec, vec::Vec};
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use anos::println;
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use bootloader::{entry_point, BootInfo};
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use core::panic::PanicInfo;
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entry_point!(kernel_main);
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fn kernel_main(boot_info: &'static BootInfo) -> ! {
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use anos::allocator;
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use anos::memory::{self, BootInfoFrameAllocator};
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use x86_64::{structures::paging::Page, VirtAddr};
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println!("Hello World{}", "!");
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anos::init();
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let phys_mem_offset = VirtAddr::new(boot_info.physical_memory_offset);
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let mut mapper = unsafe { memory::init(phys_mem_offset) };
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let mut frame_allocator = unsafe { BootInfoFrameAllocator::init(&boot_info.memory_map) };
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let page = Page::containing_address(VirtAddr::new(0xdeadbeaf000));
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memory::create_example_mapping(page, &mut mapper, &mut frame_allocator);
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let page_ptr: *mut u64 = page.start_address().as_mut_ptr();
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unsafe { page_ptr.offset(400).write_volatile(0x_f021_f077_f065_f04e) };
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allocator::init_heap(&mut mapper, &mut frame_allocator).expect("heap initialization failed");
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let heap_value = Box::new(41);
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println!("heap_value at {:p}", heap_value);
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let mut vec = Vec::new();
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for i in 0..500 {
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vec.push(i);
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}
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println!("vec at {:p}", vec.as_slice());
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let reference_counted = Rc::new(vec![1, 2, 3]);
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let cloned_reference = reference_counted.clone();
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println!(
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"current reference count is {}",
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Rc::strong_count(&cloned_reference)
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);
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core::mem::drop(reference_counted);
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println!(
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"reference count is {} now",
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Rc::strong_count(&cloned_reference)
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);
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// 触发一个中断
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x86_64::instructions::interrupts::int3();
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println!("It didn't crash!");
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#[cfg(test)]
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test_main();
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anos::hlt_loop();
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}
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// 在非测试模式下，将 panic 信息打印到 VGA 缓冲区
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#[cfg(not(test))]
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#[panic_handler]
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// panic! 时将会进行栈展开，执行各种 drop 函数来回收垃圾
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// 禁用标准库之后，这些东西就都没有了，我们需要把它重写一遍
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fn panic(info: &PanicInfo) -> ! {
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println!("{}", info);
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anos::hlt_loop();
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}
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#[cfg(test)]
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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anos::test_panic_handler(info)
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}
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