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/arch/mod.rs

@@ -0,0 +1,3 @@
+#[cfg(target_arch="x86_64")]
+#[macro_use]
+pub mod x86_64;

kernel/src/arch/x86_64/asm/current.rs

@@ -0,0 +1,18 @@
+use crate::include::bindings::bindings::process_control_block;
+
+use core::{arch::asm, sync::atomic::compiler_fence};
+
+/// @brief 获取指向当前进程的pcb的可变引用
+#[inline]
+pub fn current_pcb() -> &'static mut process_control_block {
+    let ret: Option<&mut process_control_block>;
+    unsafe {
+        let mut tmp: u64 = !(32767u64);
+        compiler_fence(core::sync::atomic::Ordering::SeqCst);
+        asm!("and {0}, rsp", inout(reg)(tmp),);
+        compiler_fence(core::sync::atomic::Ordering::SeqCst);
+        ret = (tmp as *mut process_control_block).as_mut();
+    }
+
+    ret.unwrap()
+}

kernel/src/arch/x86_64/asm/irqflags.rs

@@ -0,0 +1,24 @@
+use core::arch::asm;
+
+#[inline]
+pub fn local_irq_save(flags: &mut u64) {
+    unsafe {
+        asm!(
+            "pushfq",
+            "pop rax",
+            "mov rax, {0}",
+            "cli",
+            out(reg)(*flags),
+        );
+    }
+}
+
+#[inline]
+pub fn local_irq_restore(flags: &u64) {
+    let x = *flags;
+
+    unsafe {
+        asm!("push r15",
+            "popfq", in("r15")(x));
+    }
+}

kernel/src/arch/x86_64/asm/mod.rs

@@ -0,0 +1,3 @@
+pub mod irqflags;
+#[macro_use]
+pub mod current;

kernel/src/arch/x86_64/cpu.rs

@@ -0,0 +1,16 @@
+use core::arch::asm;
+
+/// @brief 获取当前cpu的apic id
+#[inline]
+pub fn arch_current_apic_id() -> u8 {
+    let cpuid_res: u32;
+    unsafe {
+        asm!(
+             "mov eax, 1",
+             "cpuid",
+             "mov r15, ebx",
+             lateout("r15") cpuid_res
+        );
+    }
+    return (cpuid_res >> 24) as u8;
+}

kernel/src/arch/x86_64/include/asm/cmpxchg.h

@@ -1,6 +1,6 @@
 #pragma once
 #include <common/compiler.h>
-#include <arch/x86_64/asm/asm.h>
+#include <asm/asm.h>
 
 /**
  * @brief 通过extern不存在的函数，来让编译器报错。以防止不符合要求的代码的产生。

kernel/src/arch/x86_64/include/asm/irqflags.h

@@ -1,5 +1,5 @@
 #pragma once
-
+#include <asm/asm.h>
 // 保存当前rflags的值到变量x内并关闭中断
 #define local_irq_save(x) __asm__ __volatile__("pushfq ; popq %0 ; cli" \
                                                : "=g"(x)::"memory")

kernel/src/arch/x86_64/mod.rs

@@ -0,0 +1,3 @@
+#[macro_use]
+pub mod asm;
+pub mod cpu;