实现SystemV共享内存 (#690)

* 实现SystemV共享内存

* 测试shm

* 添加测试程序

* 完善细节

* 修正shm的时间数据错误的问题

* fix: devfs的metadata权限为0x777的错误

---------

Co-authored-by: longjin <longjin@DragonOS.org>

kernel/src/libs/futex/futex.rs

@@ -22,7 +22,7 @@ use crate::{
     syscall::user_access::{UserBufferReader, UserBufferWriter},
     time::{
         timer::{next_n_us_timer_jiffies, Timer, WakeUpHelper},
-        TimeSpec,
+        PosixTimeSpec,
     },
 };
 
@@ -220,7 +220,7 @@ impl Futex {
         uaddr: VirtAddr,
         flags: FutexFlag,
         val: u32,
-        abs_time: Option<TimeSpec>,
+        abs_time: Option<PosixTimeSpec>,
         bitset: u32,
     ) -> Result<usize, SystemError> {
         if bitset == 0 {

kernel/src/libs/futex/syscall.rs

@@ -3,7 +3,7 @@ use system_error::SystemError;
 use crate::{
     mm::{verify_area, VirtAddr},
     syscall::Syscall,
-    time::TimeSpec,
+    time::PosixTimeSpec,
 };
 
 use super::{
@@ -16,7 +16,7 @@ impl Syscall {
         uaddr: VirtAddr,
         operation: FutexFlag,
         val: u32,
-        timeout: Option<TimeSpec>,
+        timeout: Option<PosixTimeSpec>,
         uaddr2: VirtAddr,
         val2: u32,
         val3: u32,

kernel/src/libs/printk.rs

@@ -16,7 +16,7 @@ use crate::{
         kmsg::KMSG,
         log::{LogLevel, LogMessage},
     },
-    time::TimeSpec,
+    time::PosixTimeSpec,
 };
 
 #[macro_export]
@@ -120,7 +120,7 @@ pub struct Logger;
 impl Logger {
     pub fn log(&self, log_level: usize, message: fmt::Arguments) {
         if unsafe { KMSG.is_some() } {
-            let timestamp: TimeSpec = TimeSpec::now();
+            let timestamp: PosixTimeSpec = PosixTimeSpec::now_cpu_time();
             let log_level = LogLevel::from(log_level);
 
             let log_message = LogMessage::new(timestamp, log_level, message.to_string());