cos2000v2/lib/handlers.c

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/*******************************************************************************/
/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
/* */
#include "interrupts.h"
#include "types.h"
#include "asm.h"
#include "memory.h"
#include "video.h"
#include "gdt.h"
#include "system.h"
#include "debug.h"
#include "process.h"
/******************************************************************************/
/* Déclenché lors de l'appel d'une interruption */
__attribute__((interrupt)) void interruption(exception_stack_noerror *caller)
{
print("Appel d'une interruption\r\n");
}
/******************************************************************************/
/* Les expections */
static u8 ex14_errors1[] =
"Supervisory process tried to read a non-present page entry";
static u8 ex14_errors2[] =
"Supervisory process tried to read a page and caused a protection fault";
static u8 ex14_errors3[] =
"Supervisory process tried to write to a non-present page entry";
static u8 ex14_errors4[] =
"Supervisory process tried to write a page and caused a protection fault";
static u8 ex14_errors5[] =
"User process tried to read a non-present page entry";
static u8 ex14_errors6[] =
"User process tried to read a page and caused a protection fault";
static u8 ex14_errors7[] =
"User process tried to write to a non-present page entry";
static u8 ex14_errors8[] =
"User process tried to write a page and caused a protection fault";
static u8 *ex14_errors[] =
{ &ex14_errors1, &ex14_errors2, &ex14_errors3, &ex14_errors4,
&ex14_errors5, &ex14_errors6, &ex14_errors7, &ex14_errors8
};
__attribute__ ((noreturn)) void exception_handler(regs *dump)
{
u32 exception=dump->eip;
exception_stack_noerror *caller = (exception_stack_noerror*) ((u32*)dump->esp+1);
bool noerror,user;
if (caller->cs==SEL_KERNEL_CODE || caller->cs==SEL_USER_CODE)
{
noerror=true;
dump->eip = caller->eip;
dump->cs = caller->cs;
dump->eflags = caller->eflags;
if (dump->cs==SEL_KERNEL_CODE)
{
dump->esp = (u32) caller + sizeof(exception_stack_noerror);
user=false;
}
else
{
dump->esp = (u32) ((exception_stack_noerror_user*) caller)->esp;
dump->ss = (u32) ((exception_stack_noerror_user*) caller)->ss;
user=true;
}
}
else
{
noerror=false;
dump->eip = ((exception_stack*)caller)->eip;
dump->cs = ((exception_stack*)caller)->cs;
if (dump->cs==SEL_KERNEL_CODE)
{
dump->esp = (u32) caller + sizeof(exception_stack);
user=false;
}
else
{
dump->esp = (u32) ((exception_stack_user*) caller)->esp;
dump->ss = (u32) ((exception_stack_user*) caller)->ss;
user=true;
}
}
switch (exception)
{
case 0:
cpuerror("#DE Divide error", dump, false);
case 1:
changevc(6);
clearscreen();
show_lightcpu(dump);
printf("\r\n\033[7m[P]\033[0m PAS A PAS \033[7m D \033[0m PAS A PAS DETAILLE \033[7m C \033[0m CONTINUER \033[7m S \033[0m STOPPER \033[7m V \033[0m VOIR \033[7m S \033[0m SCINDER");
sti();
u8 ascii = waitascii();
cli();
if (ascii == 'P' || ascii == 'p')
setdebugreg(0,
caller->eip + disasm(caller->eip, NULL, false),
DBG_EXEC);
else if (ascii == 'D' || ascii == 'd')
setdebugreg(0, 0, DBG_CLEAR);
else if (ascii == 'C' || ascii == 'c')
setdebugreg(0, 0, DBG_CLEAR);
else if (ascii == 'S' || ascii == 's')
{
changevc(0);
sti();
initselectors(getinitretry());
}
changevc(0);
goto endofexception;
case 2:
cpuerror("NMI Non-maskable hardware interrupt", dump, false);
case 3:
cpuerror("#BP INT3 instruction", dump, true);
iret();
case 4:
cpuerror("#OF INTO instruction detected overflow", dump, false);
case 5:
cpuerror("#BR BOUND instruction detected overrange", dump, false);
case 6:
cpuerror("#UD Invalid instruction opcode", dump, false);
case 7:
cpuerror("#NM No coprocessor", dump, false);
case 8:
cpuerror("#DF Double fault", dump, false);
case 9:
cpuerror("Coprocessor segment overrun", dump, false);
case 10:
cpuerror("#TS Invalid task state segment (TSS)", dump, false);
case 11:
cpuerror("#NP Segment not present", dump, false);
case 12:
cpuerror("#SS Stack fault", dump, false);
case 13:
cpuerror("#GP General protection fault (GPF)", dump, false);
case 14:
if (dump->cr2 >= USER_CODE && dump->cr2 < USER_STACK)
{
virtual_range_new(getcurrentprocess()->pdd,
(u8 *) (dump->cr2 & 0xFFFFF000),
PAGESIZE, PAGE_ALL);
}
else
{
printf("Page fault - %s at adress %Y cs:eip - %Y:%Y\r\n",
ex14_errors[((exception_stack*) caller)->error_code & 0xF], dump->cr2,
dump->cs, dump->eip);
cpuerror("#PGF Page fault", dump, false);
}
goto endofexception;
case 15:
cpuerror("(reserved)", dump, false);
case 16:
cpuerror("#MF Coprocessor error", dump, false);
case 17:
cpuerror("#AC Alignment check", dump, false);
case 18:
cpuerror("#MC Machine check", dump, false);
}
endofexception:
if (dump->cs==SEL_KERNEL_CODE)
{
setESP(dump);
restcpu_kernel();
}
else
{
setESP(dump);
restcpu_user();
iret();
}
}
/******************************************************************************/
/* Les IRQ par défaut */
__attribute__((interrupt)) void irq0(exception_stack_noerror *caller)
{ print("irq 0");
irqendmaster();
}
__attribute__((interrupt)) void irq1(exception_stack_noerror *caller)
{
print("irq 1");
while ((inb(0x64) & 1) == 0);
inb(0x60);
irqendmaster();
}
__attribute__((interrupt)) void irq2(exception_stack_noerror *caller)
{ print("irq 2");
irqendmaster();
}
__attribute__((interrupt)) void irq3(exception_stack_noerror *caller)
{
print("irq 3");
irqendmaster();
}
__attribute__((interrupt)) void irq4(exception_stack_noerror *caller)
{
print("irq 4");
irqendmaster();
}
__attribute__((interrupt)) void irq5(exception_stack_noerror *caller)
{
print("irq 5");
irqendmaster();
}
__attribute__((interrupt)) void irq6(exception_stack_noerror *caller)
{
print("irq 6");
irqendmaster();
}
__attribute__((interrupt)) void irq7(exception_stack_noerror *caller)
{
print("irq 7");
irqendmaster();
}
__attribute__((interrupt)) void irq8(exception_stack_noerror *caller)
{
print("irq 8");
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq9(exception_stack_noerror *caller)
{
print("irq 9");
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq10(exception_stack_noerror *caller)
{
print("irq 10");
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq11(exception_stack_noerror *caller)
{
print("irq 11");
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq12(exception_stack_noerror *caller)
{
print("irq 12");
while ((inb(0x64) & 1) == 0);
inb(0x60);
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq13(exception_stack_noerror *caller)
{
print("irq 13");
irqendslave();
irqendmaster();
popad();
popf();
}
__attribute__((interrupt)) void irq14(exception_stack_noerror *caller)
{
print("irq 14");
irqendslave();
irqendmaster();
}
__attribute__((interrupt)) void irq15(exception_stack_noerror *caller)
{
print("irq 15");
irqendslave();
irqendmaster();
}