Module trap

Handles trap.

Modules

gdt 🔒

Configure the Global Descriptor Table (GDT).

idt 🔒

Configure the Interrupt Descriptor Table (IDT).

syscall 🔒

Configure fast syscall.

Structs

RawUserContext 🔒

Userspace context.

TrapFrame

Trap frame of kernel interrupt

Statics

KERNEL_INTERRUPT_NESTED_LEVEL 🔒

USER_PAGE_FAULT_HANDLER 🔒

Functions

handle_kernel_page_fault 🔒

FIXME: this is a hack because we don’t allocate kernel space for IO memory. We are currently using the linear mapping for IO memory. This is not a good practice.

handle_user_page_fault 🔒

Handles page fault from user space.

init 🔒 ^⚠

Initializes interrupt handling on x86_64.

inject_user_page_fault_handler

Injects a custom handler for page faults that occur in the kernel and are caused by user-space address.

is_kernel_interrupted

Returns true if this function is called within the context of an IRQ handler and the IRQ occurs while the CPU is executing in the kernel mode. Otherwise, it returns false.

trap_handler 🔒

Handle traps (only from kernel).