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#include "kernel.h"
#include "exceptions.h"
#include "scheduler.h"
#include "syscalls.h"
#include "log.h"
#include "asm_x86.h"
#include "smp.h"
#include "apic.h"
static void defklog(uint32_t esp)
{
klog("EXCEPTION: eip: 0x%08X",*(uint32_t *)esp);
esp+=4;
klog("EXCEPTION: segment: 0x%08X",*(uint16_t *)esp);
esp+=4;
klog("EXCPETION: eflags: 0x%08X",*(uint32_t *)esp);
}
static void show_selector_error(uint32_t err)
{
klog("Selector Error Details:");
klog("External Event: %x",err&0b1);
klog("Location: 0x%x (0-GDT/1-IDT/2-LDT/3-IDT)",err&0b110);
klog("Selector: 0x%x",err&0b1111111111111000);
}
static void show_page_fault_error(uint32_t error_code)
{
klog("Page Fault Error Details:");
klog("error_code_P (Present): %d",error_code&1?1:0);
klog("error_code_W/R (Write): %d",error_code&2?1:0);
klog("error_code_U/S (User): %d",error_code&4?1:0);
klog("error_code_RSVD (Reserved Write) : %d",error_code&8?1:0);
klog("error_code_I/D (Instruction Fetch): %d",error_code&16?1:0);
klog("at addr: 0x%08X",x86_get_cr(2));
}
uint32_t exception_handle(uint32_t esp, uint32_t irq)
{
uint32_t error_code=0;
klog("EXCEPTION: apicID: 0x%08X",apic_id());
klog("EXCEPTION: task: %d",task_get_current_pid());
klog("EXCEPTION: vector nr.: %d",irq);
switch(irq){ //this interrupts push also an error_code
case 8:
case 10:
case 11:
case 12:
case 13:
case 14:
case 17:
case 30:
error_code = *(uint32_t *)esp;
esp+=4;
}
klog("EXCEPTION: error_code: %d",irq);
defklog(esp);
switch(irq){
case 0:
klog("Divide by 0");
break;
case 1:
klog("Single step (debugger)");
break;
case 2:
klog("Non Maskable Interrupt");
break;
case 3:
klog("Breakpoint (debugger)");
break;
case 4:
klog("Overflow");
break;
case 5:
klog("Bounds check");
break;
case 6:
klog("Undefined OP Code");
break;
case 7:
klog("No coprocessor");
break;
case 8:
klog("Double Fault");
break;
case 9:
klog("Coprocessor Segment Overrun");
break;
case 10:
show_selector_error(error_code);
klog("Invalid TSS");
break;
case 11:
show_selector_error(error_code);
klog("Segment Not Present");
break;
case 12:
show_selector_error(error_code);
klog("Stack Segment Overrun");
break;
case 13:
show_selector_error(error_code);
klog("Exception: Fault: General Protection Fault");
break;
case 14:
show_page_fault_error(error_code);
klog("Exception: Fault: Page Fault");
break;
case 15:
klog("RESERVED");
break;
case 16:
klog("Coprocessor error");
break;
case 17:
klog("Alignment Check");
break;
case 18:
klog("Machine Check");
break;
}
klog("killing task in question!");
task_syscall(SYSCALL_EXIT,task_get_current_pid(),0,0);
return scheduler_run(esp,0);
}
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