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fix: interrupt handler function uses an array

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fix: gdt calls cli asm instruction at init
This commit is contained in:
0x35c 2024-10-08 10:56:15 +02:00
parent 14758ff4ea
commit d348ac109e
2 changed files with 36 additions and 63 deletions
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1
src/gdt/set_gdt.s
View File

@ -4,6 +4,7 @@
.global set_gdt
set_gdt:
cli // disable all interrupts
mov eax, [esp+4] // 1st parameter : pointer to the IDT
lgdt [eax]
mov ax, 0x10 // 0x10 is the offset in the GDT to our data segment

98
src/interrupt/handler.c
View File

@ -1,76 +1,48 @@
#include "interrupts.h"
#include "kpanic.h"
#include "kprintf.h"
#include "utils.h"
#include <stdint.h>
const char *faults[] = {
"division by zero",
"debugger",
"NMI",
"breakpoint",
"overflow",
"bounds",
"invalid opcode",
"coprocessor not available",
"double fault",
"coprocessor segement overrun",
"invalid task state segment",
"segment not present",
"stack fault",
"general protection fault",
"page fault",
"reserved",
"math fault",
"alignment check",
"machine check",
"SIMD floating point exception",
};
void exception_handler(void)
{
int8_t index = -1;
__asm__ volatile("movb %%bl, %0" ::"m"(index));
switch (index) {
case 0:
kpanic("interrupt: division by zero\n");
break;
case 1:
kpanic("interrupt: debugger\n");
break;
case 2:
kpanic("interrupt: NMI\n");
break;
case 3:
kpanic("interrupt: breakpoint\n");
break;
case 4:
kpanic("interrupt: overflow\n");
break;
case 5:
kpanic("interrupt: bounds\n");
break;
case 6:
kpanic("interrupt: invalid opcode\n");
break;
case 7:
kpanic("interrupt: coprocessor not available\n");
break;
case 8:
kpanic("interrupt: double fault\n");
break;
case 9:
kpanic("interrupt: coprocessor segement overrun\n");
break;
case 10:
kpanic("interrupt: invalid task state segment\n");
break;
case 11:
kpanic("interrupt: segment not present\n");
break;
case 12:
kpanic("interrupt: stack fault\n");
break;
case 13:
kpanic("interrupt: general protection fault\n");
break;
case 14:
kpanic("interrupt: page fault\n");
break;
case 15:
kpanic("interrupt: reserved\n");
break;
case 16:
kpanic("interrupt: math fault\n");
break;
case 17:
kpanic("interrupt: alignment check\n");
break;
case 18:
kpanic("interrupt: machine check\n");
break;
case 19:
kpanic("interrupt: SIMD floating point exception\n");
break;
default:
if (index == -1) {
kprintf(KERN_ERR "interrupt triggered without a code\n");
return;
break;
}
uint8_t i = 0;
while (i < ARRAY_SIZE(faults)) {
if (i == index)
kpanic("interrupt: %s\n", faults[i]);
i++;
}
kprintf(KERN_ERR "interrupt triggered with no matching code\n");
}