342 lines
8.3 KiB
C
342 lines
8.3 KiB
C
/*******************************************************************************/
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/* COS2000 - Compatible Operating System - LGPL v3 - Hordé Nicolas */
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/* */
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#include "interrupts.h"
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#include "types.h"
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#include "asm.h"
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#include "memory.h"
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#include "video.h"
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#include "gdt.h"
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#include "system.h"
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#include "debug.h"
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#include "process.h"
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/******************************************************************************/
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/* Déclenché lors de l'appel d'une interruption */
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__attribute__ ((noreturn)) void interruption_handler(regs *dump)
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{
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u32 interruption=dump->eip;
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exception_stack_noerror *caller = (exception_stack_noerror*) ((u32*)dump->esp+1);
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bool noerror,user;
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if (caller->cs==SEL_KERNEL_CODE || caller->cs==SEL_USER_CODE)
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{
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noerror=true;
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dump->eip = caller->eip;
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dump->cs = caller->cs;
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dump->eflags = caller->eflags;
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if (dump->cs==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack_noerror);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_noerror_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_noerror_user*) caller)->ss;
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user=true;
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}
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}
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else
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{
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noerror=false;
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dump->eip = ((exception_stack*)caller)->eip;
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dump->cs = ((exception_stack*)caller)->cs;
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if (dump->cs==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_user*) caller)->ss;
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user=true;
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}
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}
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switch (interruption)
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{
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case 20:
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show_lightcpu(dump);
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break;
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default:
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print("Appel d'une interruption\r\n");
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}
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if (dump->cs==SEL_KERNEL_CODE)
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{
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setESP(dump);
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restcpu_kernel();
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}
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else
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{
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setESP(dump);
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restcpu_user();
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iret();
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}
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}
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/******************************************************************************/
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/* Les expections */
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static u8 ex14_errors1[] =
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"Supervisory process tried to read a non-present page entry";
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static u8 ex14_errors2[] =
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"Supervisory process tried to read a page and caused a protection fault";
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static u8 ex14_errors3[] =
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"Supervisory process tried to write to a non-present page entry";
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static u8 ex14_errors4[] =
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"Supervisory process tried to write a page and caused a protection fault";
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static u8 ex14_errors5[] =
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"User process tried to read a non-present page entry";
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static u8 ex14_errors6[] =
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"User process tried to read a page and caused a protection fault";
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static u8 ex14_errors7[] =
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"User process tried to write to a non-present page entry";
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static u8 ex14_errors8[] =
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"User process tried to write a page and caused a protection fault";
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static u8 *ex14_errors[] =
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{ &ex14_errors1, &ex14_errors2, &ex14_errors3, &ex14_errors4,
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&ex14_errors5, &ex14_errors6, &ex14_errors7, &ex14_errors8
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};
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__attribute__ ((noreturn)) void exception_handler(regs *dump)
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{
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u32 exception=dump->eip;
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exception_stack_noerror *caller = (exception_stack_noerror*) ((u32*)dump->esp+1);
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bool noerror,user;
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if (caller->cs==SEL_KERNEL_CODE || caller->cs==SEL_USER_CODE)
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{
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noerror=true;
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dump->eip = caller->eip;
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dump->cs = caller->cs;
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dump->eflags = caller->eflags;
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if (dump->cs==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack_noerror);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_noerror_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_noerror_user*) caller)->ss;
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user=true;
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}
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}
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else
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{
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noerror=false;
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dump->eip = ((exception_stack*)caller)->eip;
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dump->cs = ((exception_stack*)caller)->cs;
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if (dump->cs==SEL_KERNEL_CODE)
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{
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dump->esp = (u32) caller + sizeof(exception_stack);
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user=false;
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}
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else
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{
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dump->esp = (u32) ((exception_stack_user*) caller)->esp;
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dump->ss = (u32) ((exception_stack_user*) caller)->ss;
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user=true;
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}
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}
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switch (exception)
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{
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case 0:
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cpuerror("#DE Divide error", dump, false);
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case 1:
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changevc(6);
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clearscreen();
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show_lightcpu(dump);
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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");
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sti();
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u8 ascii = waitascii();
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cli();
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if (ascii == 'P' || ascii == 'p')
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setdebugreg(0,
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caller->eip + disasm(caller->eip, NULL, false),
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DBG_EXEC);
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else if (ascii == 'D' || ascii == 'd')
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setdebugreg(0, 0, DBG_CLEAR);
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else if (ascii == 'C' || ascii == 'c')
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setdebugreg(0, 0, DBG_CLEAR);
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else if (ascii == 'S' || ascii == 's')
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{
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changevc(0);
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sti();
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initselectors(getinitretry());
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}
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changevc(0);
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goto endofexception;
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case 2:
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cpuerror("NMI Non-maskable hardware interrupt", dump, false);
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case 3:
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cpuerror("#BP INT3 instruction", dump, true);
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iret();
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case 4:
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cpuerror("#OF INTO instruction detected overflow", dump, false);
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case 5:
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cpuerror("#BR BOUND instruction detected overrange", dump, false);
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case 6:
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cpuerror("#UD Invalid instruction opcode", dump, false);
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case 7:
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cpuerror("#NM No coprocessor", dump, false);
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case 8:
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cpuerror("#DF Double fault", dump, false);
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case 9:
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cpuerror("Coprocessor segment overrun", dump, false);
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case 10:
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cpuerror("#TS Invalid task state segment (TSS)", dump, false);
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case 11:
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cpuerror("#NP Segment not present", dump, false);
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case 12:
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cpuerror("#SS Stack fault", dump, false);
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case 13:
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cpuerror("#GP General protection fault (GPF)", dump, false);
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case 14:
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if (dump->cr2 >= USER_CODE && dump->cr2 < USER_STACK)
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{
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virtual_range_new(findcurrentprocess()->pdd,
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(u8 *) (dump->cr2 & 0xFFFFF000),
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PAGESIZE, PAGE_ALL);
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}
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else
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{
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printf("Page fault - %s at adress %Y cs:eip - %Y:%Y\r\n",
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ex14_errors[((exception_stack*) caller)->error_code & 0xF], dump->cr2,
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dump->cs, dump->eip);
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cpuerror("#PGF Page fault", dump, false);
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}
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goto endofexception;
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case 15:
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cpuerror("(reserved)", dump, false);
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case 16:
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cpuerror("#MF Coprocessor error", dump, false);
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case 17:
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cpuerror("#AC Alignment check", dump, false);
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case 18:
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cpuerror("#MC Machine check", dump, false);
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}
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endofexception:
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if (dump->cs==SEL_KERNEL_CODE)
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{
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setESP(dump);
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restcpu_kernel();
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}
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else
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{
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setESP(dump);
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restcpu_user();
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iret();
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}
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}
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/******************************************************************************/
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/* Les IRQ par défaut */
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__attribute__((interrupt)) void irq0(exception_stack_noerror *caller)
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{
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print("irq 0");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq1(exception_stack_noerror *caller)
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{
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print("irq 1");
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while ((inb(0x64) & 1) == 0);
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inb(0x60);
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irqendmaster();
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}
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__attribute__((interrupt)) void irq2(exception_stack_noerror *caller)
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{ print("irq 2");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq3(exception_stack_noerror *caller)
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{
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print("irq 3");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq4(exception_stack_noerror *caller)
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{
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print("irq 4");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq5(exception_stack_noerror *caller)
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{
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print("irq 5");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq6(exception_stack_noerror *caller)
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{
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print("irq 6");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq7(exception_stack_noerror *caller)
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{
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print("irq 7");
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irqendmaster();
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}
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__attribute__((interrupt)) void irq8(exception_stack_noerror *caller)
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{
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print("irq 8");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq9(exception_stack_noerror *caller)
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{
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print("irq 9");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq10(exception_stack_noerror *caller)
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{
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print("irq 10");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq11(exception_stack_noerror *caller)
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{
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print("irq 11");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq12(exception_stack_noerror *caller)
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{
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print("irq 12");
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while ((inb(0x64) & 1) == 0);
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inb(0x60);
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq13(exception_stack_noerror *caller)
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{
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print("irq 13");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq14(exception_stack_noerror *caller)
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{
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print("irq 14");
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irqendslave();
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irqendmaster();
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}
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__attribute__((interrupt)) void irq15(exception_stack_noerror *caller)
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{
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print("irq 15");
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irqendslave();
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irqendmaster();
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}
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