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_option)] 10 #![feature(const_trait_impl)] 11 #![feature(const_refs_to_cell)] 12 #![feature(core_intrinsics)] 13 #![feature(c_void_variant)] 14 #![feature(extract_if)] 15 #![feature(fn_align)] 16 #![feature(linked_list_retain)] 17 #![feature(naked_functions)] 18 #![feature(new_uninit)] 19 #![feature(ptr_internals)] 20 #![feature(trait_upcasting)] 21 #![feature(slice_ptr_get)] 22 #![feature(sync_unsafe_cell)] 23 #![feature(vec_into_raw_parts)] 24 #![feature(c_variadic)] 25 #![cfg_attr(target_os = "none", no_std)] 26 #![allow(internal_features)] 27 // clippy的配置 28 #![deny(clippy::all)] 29 #![allow(clippy::bad_bit_mask)] 30 // 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） 31 #![allow(clippy::let_and_return)] 32 #![allow(clippy::needless_pass_by_ref_mut)] 33 #![allow(clippy::needless_return)] 34 #![allow(clippy::single_char_pattern)] 35 #![allow(clippy::upper_case_acronyms)] 36 37 #[cfg(test)] 38 #[macro_use] 39 extern crate std; 40 41 use core::panic::PanicInfo; 42 43 /// 导出x86_64架构相关的代码，命名为arch模块 44 #[macro_use] 45 mod arch; 46 #[macro_use] 47 mod libs; 48 #[macro_use] 49 mod include; 50 mod bpf; 51 mod debug; 52 mod driver; // 如果driver依赖了libs，应该在libs后面导出 53 mod exception; 54 mod filesystem; 55 mod init; 56 mod ipc; 57 mod misc; 58 mod mm; 59 mod net; 60 mod perf; 61 mod process; 62 mod sched; 63 mod smp; 64 mod syscall; 65 mod time; 66 #[cfg(target_arch = "x86_64")] 67 mod virt; 68 69 #[macro_use] 70 extern crate alloc; 71 #[macro_use] 72 extern crate atomic_enum; 73 #[macro_use] 74 extern crate bitflags; 75 extern crate elf; 76 #[macro_use] 77 extern crate lazy_static; 78 extern crate num; 79 #[macro_use] 80 extern crate num_derive; 81 extern crate smoltcp; 82 #[macro_use] 83 extern crate intertrait; 84 #[cfg(target_arch = "x86_64")] 85 extern crate x86; 86 #[macro_use] 87 extern crate kcmdline_macros; 88 extern crate klog_types; 89 extern crate uefi; 90 extern crate uefi_raw; 91 #[macro_use] 92 extern crate wait_queue_macros; 93 94 use crate::mm::allocator::kernel_allocator::KernelAllocator; 95 96 use crate::process::ProcessManager; 97 98 #[cfg(all(feature = "backtrace", target_arch = "x86_64"))] 99 extern crate mini_backtrace; 100 101 extern "C" { 102 fn lookup_kallsyms(addr: u64, level: i32) -> i32; 103 } 104 105 // 声明全局的分配器 106 #[cfg_attr(not(test), global_allocator)] 107 pub static KERNEL_ALLOCATOR: KernelAllocator = KernelAllocator; 108 109 /// 全局的panic处理函数 110 #[cfg(target_os = "none")] 111 #[panic_handler] 112 #[no_mangle] 113 pub fn panic(info: &PanicInfo) -> ! { 114 use log::error; 115 116 error!("Kernel Panic Occurred."); 117 118 match info.location() { 119 Some(loc) => { 120 println!( 121 "Location:\n\tFile: {}\n\tLine: {}, Column: {}", 122 loc.file(), 123 loc.line(), 124 loc.column() 125 ); 126 } 127 None => { 128 println!("No location info"); 129 } 130 } 131 println!("Message:\n\t{}", info.message()); 132 133 #[cfg(all(feature = "backtrace", target_arch = "x86_64"))] 134 { 135 unsafe { 136 let bt = mini_backtrace::Backtrace::<16>::capture(); 137 println!("Rust Panic Backtrace:"); 138 let mut level = 0; 139 for frame in bt.frames { 140 lookup_kallsyms(frame as u64, level); 141 level += 1; 142 } 143 }; 144 } 145 146 println!("Current PCB:\n\t{:?}", (ProcessManager::current_pcb())); 147 148 ProcessManager::exit(usize::MAX); 149 } 150