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#include <kernel/arch/amd64/interrupts.h>
#include <kernel/arch/amd64/port_io.h>
#include <kernel/arch/generic.h>
#include <kernel/malloc.h>
#include <kernel/panic.h>
#include <kernel/proc.h>
#include <stdbool.h>
#include <stdint.h>
enum {
NMI = 0x02,
GP_FAULT = 0x0d,
PAGE_FAULT = 0x0e,
};
void (*irq_fn[16])(void) = {0};
static void log_interrupt(int interrupt, uint64_t *stackframe) {
kprintf("interrupt %d, rip = k/%08x, cs 0x%x, code 0x%x\n",
interrupt, stackframe[0], stackframe[1], stackframe[-1]);
if ((stackframe[1] & 0x3) == 0) {
uint64_t *stack = (void*)stackframe[3];
kprintf("kernel rip = %p, *rip = %p\n", stack, *stack);
}
if (interrupt == PAGE_FAULT) {
uint64_t addr = 0x69;
asm("mov %%cr2, %0" : "=r"(addr));
kprintf("addr 0x%x\n", addr);
}
}
void isr_stage3(uint8_t interrupt, uint64_t *stackframe) {
uint8_t irqn = interrupt - IRQ_IBASE;
if (irqn < 16) {
if (irq_fn[irqn]) {
irq_fn[irqn]();
irq_eoi(irqn);
return;
}
}
if (interrupt == NMI) { /* print some debugging information */
log_interrupt(interrupt, stackframe);
mem_debugprint();
return;
}
if (interrupt == PAGE_FAULT || interrupt == GP_FAULT) {
stackframe++;
}
if ((stackframe[1] & 0x3) == 0) { /* in kernel */
log_interrupt(interrupt, stackframe);
cpu_halt();
} else { /* in user */
proc_kill(proc_cur, interrupt);
proc_switch_any();
}
}
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