ax_cpu/
uspace_common.rs

1use ax_memory_addr::VirtAddr;
2
3use crate::{trap::PageFaultFlags, uspace::ExceptionInfo};
4
5/// A reason as to why the control of the CPU is returned from
6/// the user space to the kernel.
7#[derive(Debug, Clone, Copy)]
8pub enum ReturnReason {
9    /// An interrupt.
10    Interrupt,
11    /// A system call.
12    Syscall,
13    /// A page fault.
14    PageFault(VirtAddr, PageFaultFlags),
15    /// Other kinds of exceptions.
16    Exception(ExceptionInfo),
17    /// Unknown reason.
18    Unknown,
19}
20
21/// A generalized kind for [`ExceptionInfo`].
22#[derive(Debug, Clone, Copy, PartialEq, Eq)]
23pub enum ExceptionKind {
24    #[cfg(target_arch = "x86_64")]
25    /// A debug exception.
26    Debug,
27    /// A breakpoint exception.
28    Breakpoint,
29    /// An illegal instruction exception.
30    IllegalInstruction,
31    /// A misaligned access exception.
32    Misaligned,
33    /// Other kinds of exceptions.
34    Other,
35}
ax_cpu/uspace_common.rs

ax_cpu/
uspace_common.rs
