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use crate::arch::x86_64::arch_regs::TrapFrame;
use crate::io::*;
use core::arch::asm;
/// handle page fault: for now we only check if the faulting addr is within
/// kernel heap range.
/// TODO: improve this later
pub fn page_fault_handler(frame: &mut TrapFrame, fault_addr: u64) {
let err_code = frame.err_code;
println!("pagefault @ {:#X}, err {:#X?}", fault_addr, err_code);
unsafe { asm!("hlt") };
}
/// for x86_64, return the CR3 register.
/// TODO: use page root in task struct instead of raw cr3
#[inline]
pub fn get_root() -> u64 {
let cr3: u64;
unsafe {
asm!("mov {}, cr3", out(reg) cr3);
}
return cr3;
}
/// for x86_64, return the CR3 register.
#[inline]
pub fn get_fault_addr() -> u64 {
let cr2: u64;
unsafe {
asm!("mov {}, cr2", out(reg) cr2);
}
return cr2;
}
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