Luna/kernel/src/interrupts/Entry.cpp

#define MODULE "isr"

#include "assert.h"
#include "interrupts/Context.h"
#include "interrupts/IRQ.h"
#include "interrupts/Interrupts.h"
#include "log/Log.h"
#include "misc/hang.h"
#include "std/stdio.h"
#include "thread/Scheduler.h"
#include "trace/StackTracer.h"

extern "C" void common_handler(Context* context)
{
    ASSERT(Interrupts::is_in_handler());
    if (context->number >= 0x20 && context->number < 0x30)
    {
        Interrupts::ensure_handler(); // restore the "in interrupt flag" if an interrupt happened in the middle of this
                                      // one
        IRQ::interrupt_handler(context);
        return;
    }
    if (context->number == 13)
    {
        kerrorln("General protection fault at RIP %lx, cs %ld, ss %ld, RSP %lx, error code %ld", context->rip,
                 context->cs, context->ss, context->rsp, context->error_code);
        kinfoln("Stack trace:");

        StackTracer tracer(context->rbp);
        tracer.trace_with_ip(context->rip);
        if (context->cs == 0x8) { PANIC("Fatal: GPF in kernel task"); }
        else
        {
            Interrupts::ensure_handler();
            Scheduler::task_misbehave(context);
        }
    }
    if (context->number == 14)
    {
        Interrupts::disable();
        kerrorln("Page fault in %s (RIP %lx), while trying to access %lx, error code %ld",
                 context->cs == 8 ? "ring 0" : "ring 3", context->rip, context->cr2, context->error_code);
        kinfoln("Stack trace:");

        StackTracer tracer(context->rbp);
        tracer.trace_with_ip(context->rip);

        if (context->cs == 0x8) { PANIC("Fatal: Page fault in kernel task"); }
        else
        {
            Interrupts::ensure_handler();
            Scheduler::task_misbehave(context);
        }
    }
    if (context->number == 8)
    {
        kerrorln("Double fault, halting");
        kinfoln("Stack trace:");

        StackTracer tracer(context->rbp);
        tracer.trace_with_ip(context->rip);

        hang();
    }
    if (context->number == 48)
    {
        Interrupts::ensure_handler();
        Scheduler::task_yield(context);
    }
    if (context->number == 49)
    {
        Interrupts::ensure_handler();
        Scheduler::task_exit(context);
    }
    if (context->number == 256) { kwarnln("Unused interrupt"); }
    return;
}