Implement many process syscalls.

2020-12-10 11:57:26 +08:00 · 2020-12-10 11:57:26 +08:00 · 8fbadfc951
commit 8fbadfc951
parent e56ea17566
20 changed files with 383 additions and 88 deletions
--- a/os/src/trap/context.rs
+++ b/os/src/trap/context.rs
@ -20,7 +20,9 @@ impl TrapContext {
        trap_handler: usize,
    ) -> Self {
        let mut sstatus = sstatus::read();
+        // set CPU privilege to User after trapping back
        sstatus.set_spp(SPP::User);
+        // enable Supervisor mode interrupt after trapping back
        sstatus.set_spie(true);
        let mut cx = Self {
            x: [0; 32],