Module interrupt 

Modules

idt 🔒

pic_8259

pit

plugbox

Registrar of IRQ handling routines

Functions

handle_exception 🔒

handles exception/faults (nr < 32);

handle_irq 🔒 ^⚠

handle_irq assumes the interrupt is disabled when called. this will also make sure interrupt is disabled when it returns

handle_syscall 🔒

dispatch a syscall (int 0x80). The syscall number is in rax; args in rdi, rsi, rdx. The return value is written back into the trap frame’s rax so iretq returns it to user space.

init

initialize the idt and pic_8259

interrupt_disable

interrupt_enable

irq_restore

irq_restore only re-enable irq if was_enabled==true. it will not disable irq regardless the was_enabled value. This function should only be called to restore irq based on previous irq_save();

irq_save

irq_save() disables all interrupts and returns the previous state

trap_gate 🔒