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实现gettimeofday()系统调用和clocksource+timekeeping子模块 (#278)

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- 实现gettimeofday()系统调用
- 实现clocksource+timekeeping子模块部分功能
- 实现了timespec转换成日期时间
This commit is contained in:
houmkh
2023-06-17 22:48:15 +08:00
committed by GitHub
parent a55ac7b928
commit 36fd013004
34 changed files with 1988 additions and 78 deletions
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10
kernel/src/arch/x86_64/fpu.rs
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@ -79,8 +79,7 @@ impl FpState {
/// @brief 从用户态进入内核时，保存浮点寄存器，并关闭浮点功能
pub fn fp_state_save(pcb: &mut process_control_block) {
// 该过程中不允许中断
let mut rflags: u64 = 0;
local_irq_save(&mut rflags);
let rflags = local_irq_save();
let fp: &mut FpState = if pcb.fp_state == null_mut() {
let f = Box::leak(Box::new(FpState::default()));
@ -112,14 +111,13 @@ pub fn fp_state_save(pcb: &mut process_control_block) {
"mov cr4, rax" */
)
}
local_irq_restore(&rflags);
local_irq_restore(rflags);
}
/// @brief 从内核态返回用户态时，恢复浮点寄存器，并开启浮点功能
pub fn fp_state_restore(pcb: &mut process_control_block) {
// 该过程中不允许中断
let mut rflags: u64 = 0;
local_irq_save(&mut rflags);
let rflags = local_irq_save();
if pcb.fp_state == null_mut() {
panic!("fp_state_restore: fp_state is null. pid={}", pcb.pid);
@ -143,5 +141,5 @@ pub fn fp_state_restore(pcb: &mut process_control_block) {
fp.restore();
fp.clear();
local_irq_restore(&rflags);
local_irq_restore(rflags);
}