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This commit is contained in:
Yifan Wu 2020-11-20 01:18:25 +08:00
parent e9949e5bd4
commit 3b920ac8f5
10 changed files with 74 additions and 26 deletions
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6
os/src/trap/mod.rs
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@ -10,6 +10,7 @@ use riscv::register::{
},
stval,
};
use crate::syscall::syscall;
global_asm!(include_str!("trap.S"));
@ -23,10 +24,11 @@ pub fn init() {
#[no_mangle]
pub fn trap_handler(cx: &mut TrapContext) -> &mut TrapContext {
let scause = scause::read();
let stval = stval::read();
let _stval = stval::read();
match scause.cause() {
Trap::Exception(Exception::UserEnvCall) => {
panic!("Triggered UserEnvCall!");
cx.sepc += 4;
cx.x[10] = syscall(cx.x[17], [cx.x[10], cx.x[11], cx.x[12]]) as usize;
}
_ => {
panic!("Unsupported trap!");