signal的发送（暂时父子进程之间共享信号及相应的结构体） (#89)

* 解决由于spinlock.h中包含preempt_enable()带来的循环include问题

* new: 初步实现signal的数据结构

* new:signal相关数据结构

* fix: 解决bindings.rs报一堆警告的问题

* new: rust下的kdebug kinfo kwarn kBUG kerror宏

* 移动asm.h和cmpxchg.h

* new: signal的发送（暂时只支持父子进程共享信号及处理函数）

kernel/src/lib.rs

@@ -2,27 +2,32 @@
 #![no_main] // <1>
 #![feature(core_intrinsics)] // <2>
 #![feature(alloc_error_handler)]
+#![feature(panic_info_message)]
 
 #[allow(non_upper_case_globals)]
 #[allow(non_camel_case_types)]
 #[allow(non_snake_case)]
-
-use core::intrinsics; // <2>
 use core::panic::PanicInfo;
 
+#[macro_use]
+mod arch;
+#[macro_use]
+mod include;
+mod ipc;
 
 #[macro_use]
-mod mm;
-mod include;
 mod libs;
-mod ipc;
+mod mm;
+mod process;
+mod sched;
+mod smp;
 
 extern crate alloc;
 
 use mm::allocator::KernelAllocator;
 
 // <3>
-use crate::include::bindings::bindings::{BLACK, GREEN};
+use crate::{include::bindings::bindings::{process_do_exit, BLACK, GREEN}, arch::x86_64::asm::current::current_pcb};
 
 // 声明全局的slab分配器
 #[cfg_attr(not(test), global_allocator)]
@@ -31,14 +36,44 @@ pub static KERNEL_ALLOCATOR: KernelAllocator = KernelAllocator {};
 /// 全局的panic处理函数
 #[panic_handler]
 #[no_mangle]
-pub fn panic(_info: &PanicInfo) -> ! {
-    intrinsics::abort(); // <4>
+pub fn panic(info: &PanicInfo) -> ! {
+    kerror!("Kernel Panic Occurred.");
+
+    match info.location() {
+        Some(loc) => {
+            println!(
+                "Location:\n\tFile: {}\n\tLine: {}, Column: {}",
+                loc.file(),
+                loc.line(),
+                loc.column()
+            );
+        }
+        None => {
+            println!("No location info");
+        }
+    }
+
+    match info.message() {
+        Some(msg) => {
+            println!("Message:\n\t{}", msg);
+        }
+        None => {
+            println!("No panic message.");
+        }
+    }
+
+    println!("Current PCB:\n\t{:?}", current_pcb());
+    unsafe {
+        process_do_exit(u64::MAX);
+    };
+    loop {
+        
+    }
 }
 
 /// 该函数用作测试，在process.c的initial_kernel_thread()中调用了此函数
 #[no_mangle]
 pub extern "C" fn __rust_demo_func() -> i32 {
-    
     printk_color!(GREEN, BLACK, "__rust_demo_func()\n");
 
     return 0;