1 #![no_main] // <1> 2 #![feature(alloc_error_handler)] 3 #![feature(allocator_api)] 4 #![feature(arbitrary_self_types)] 5 #![feature(asm_const)] 6 #![feature(concat_idents)] 7 #![feature(const_for)] 8 #![feature(const_mut_refs)] 9 #![feature(const_trait_impl)] 10 #![feature(const_refs_to_cell)] 11 #![feature(core_intrinsics)] 12 #![feature(c_void_variant)] 13 #![feature(extract_if)] 14 #![feature(fn_align)] 15 #![feature(linked_list_retain)] 16 #![feature(naked_functions)] 17 #![feature(new_uninit)] 18 #![feature(ptr_internals)] 19 #![feature(trait_upcasting)] 20 #![feature(slice_ptr_get)] 21 #![feature(sync_unsafe_cell)] 22 #![feature(vec_into_raw_parts)] 23 #![cfg_attr(target_os = "none", no_std)] 24 #![allow(internal_features)] 25 // clippy的配置 26 #![deny(clippy::all)] 27 #![allow(clippy::bad_bit_mask)] 28 // DragonOS允许在函数中使用return语句（尤其是长函数时，我们推荐这么做） 29 #![allow(clippy::let_and_return)] 30 #![allow(clippy::needless_pass_by_ref_mut)] 31 #![allow(clippy::needless_return)] 32 #![allow(clippy::single_char_pattern)] 33 #![allow(clippy::upper_case_acronyms)] 34 35 #[cfg(test)] 36 #[macro_use] 37 extern crate std; 38 39 use core::panic::PanicInfo; 40 41 /// 导出x86_64架构相关的代码，命名为arch模块 42 #[macro_use] 43 mod arch; 44 #[macro_use] 45 mod libs; 46 #[macro_use] 47 mod include; 48 mod debug; 49 mod driver; // 如果driver依赖了libs，应该在libs后面导出 50 mod exception; 51 mod filesystem; 52 mod init; 53 mod ipc; 54 mod misc; 55 mod mm; 56 mod net; 57 mod process; 58 mod sched; 59 mod smp; 60 mod syscall; 61 mod time; 62 63 #[cfg(target_arch = "x86_64")] 64 mod virt; 65 66 #[macro_use] 67 extern crate alloc; 68 #[macro_use] 69 extern crate atomic_enum; 70 #[macro_use] 71 extern crate bitflags; 72 extern crate elf; 73 #[macro_use] 74 extern crate lazy_static; 75 extern crate num; 76 #[macro_use] 77 extern crate num_derive; 78 extern crate smoltcp; 79 #[macro_use] 80 extern crate intertrait; 81 #[cfg(target_arch = "x86_64")] 82 extern crate x86; 83 84 extern crate klog_types; 85 extern crate uefi; 86 extern crate uefi_raw; 87 #[macro_use] 88 extern crate wait_queue_macros; 89 90 use crate::mm::allocator::kernel_allocator::KernelAllocator; 91 92 use crate::process::ProcessManager; 93 94 #[cfg(all(feature = "backtrace", target_arch = "x86_64"))] 95 extern crate mini_backtrace; 96 97 extern "C" { 98 fn lookup_kallsyms(addr: u64, level: i32) -> i32; 99 } 100 101 // 声明全局的分配器 102 #[cfg_attr(not(test), global_allocator)] 103 pub static KERNEL_ALLOCATOR: KernelAllocator = KernelAllocator; 104 105 /// 全局的panic处理函数 106 #[cfg(target_os = "none")] 107 #[panic_handler] 108 #[no_mangle] 109 pub fn panic(info: &PanicInfo) -> ! { 110 use log::error; 111 112 error!("Kernel Panic Occurred."); 113 114 match info.location() { 115 Some(loc) => { 116 println!( 117 "Location:\n\tFile: {}\n\tLine: {}, Column: {}", 118 loc.file(), 119 loc.line(), 120 loc.column() 121 ); 122 } 123 None => { 124 println!("No location info"); 125 } 126 } 127 println!("Message:\n\t{}", info.message()); 128 129 #[cfg(all(feature = "backtrace", target_arch = "x86_64"))] 130 { 131 unsafe { 132 let bt = mini_backtrace::Backtrace::<16>::capture(); 133 println!("Rust Panic Backtrace:"); 134 let mut level = 0; 135 for frame in bt.frames { 136 lookup_kallsyms(frame as u64, level); 137 level += 1; 138 } 139 }; 140 } 141 142 println!("Current PCB:\n\t{:?}", (ProcessManager::current_pcb())); 143 144 ProcessManager::exit(usize::MAX); 145 } 146