Tiberiu Chibici
913e65b856
==================================================== + Changed 'align 0x4' line above multiboot header in loader.asm to 'align 4' + Removed -e option for echo in build.sh + Modified build.sh for linux + Fixed triple fault when enabling paging + Fixed page faults at memory manager initialization + Fixed 'mem' console function + Added more info about page fault at crash screen + Added Panic() macro + Added verbose mode for memory manager [ BAD] BUILD 0.1.0.390 DATE 8/27/2011 AT 10:54 PM ==================================================== + Added stdlib routines, separated in different files + Rewritten physical memory manager + Added virtual mem manager + Added memory allocation/freeing + Added memory library + Added temporary allocation (at end of kernel), until paging is started - Removed functionality from debug console function 'mem' - Removed system.h, the one remaining function now in stdio.h
98 lines
3.2 KiB
C
98 lines
3.2 KiB
C
/*
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* crash.c
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*
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* Created on: Aug 19, 2011
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* Author: Tiberiu
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*/
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#include <debugio.h>
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string errorCodes[] =
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{
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"Division by zero", //0
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"Debugger", //1
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"Non maskable interrupt", //2
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"Breakpoint", //3
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"Overflow", //4
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"Bounds", //5
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"Invalid opcode", //6
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"Coprocessor not available", //7
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"Double fault", //8
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"Coprocessor segment overrun",//9
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"Invalid task state segment", //A
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"Segment not present", //B
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"Stack fault", //C
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"General protection fault", //D
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"Page fault", //E
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"", //F
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"Math fault", //10
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"Alignment check", //11
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"Machine check", //12
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"SIMD floating-point exception" //13
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};
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void CrashMessage(_RegsStack32 *r)
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{
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ConsoleSetDefaultColor(ColorLightRed);
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ConsoleWrite("\n"); uint32 i;
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for (i = 0; i < 80; i++) ConsoleWrite("%c", 205);
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ConsoleWrite("%#\t\t\t\tSomething went terribly wrong :(\n\n", ColorWhite);
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ConsoleWrite("There was an unhandled exception: ");
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if (r->int_no < 20)
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ConsoleWrite("%#%s (INT%u)", ColorWhite, errorCodes[r->int_no], r->int_no);
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else ConsoleWrite("%#INT%u", ColorWhite, r->int_no);
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ConsoleWrite("\nTo protect your computer, it had to be halted.\n\n");
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ConsoleWrite("Here, this might help find the problem:\n");
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Point a = {4, -1}, b = {22, -1}, c = {40, -1}, d = {58, -1};
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ConsoleSetDefaultColor(ColorWhite);
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ConsoleCursorGoto(a); ConsoleWrite("eax=0x%x", r->eax);
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ConsoleCursorGoto(b); ConsoleWrite("ebx=0x%x", r->ebx);
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ConsoleCursorGoto(c); ConsoleWrite("ecx=0x%x", r->ecx);
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ConsoleCursorGoto(d); ConsoleWrite("edx=0x%x\n", r->edx);
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ConsoleCursorGoto(a); ConsoleWrite("edi=0x%x", r->edi);
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ConsoleCursorGoto(b); ConsoleWrite("esi=0x%x", r->esi);
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ConsoleCursorGoto(c); ConsoleWrite("ebp=0x%x", r->ebp);
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ConsoleCursorGoto(d); ConsoleWrite("esp=0x%x\n", r->esp);
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ConsoleCursorGoto(a); ConsoleWrite("gs=0x%x", r->gs);
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ConsoleCursorGoto(b); ConsoleWrite("fs=0x%x", r->fs);
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ConsoleCursorGoto(c); ConsoleWrite("es=0x%x", r->es);
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ConsoleCursorGoto(d); ConsoleWrite("ds=0x%x\n", r->ds);
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ConsoleCursorGoto(a); ConsoleWrite("eip=0x%x", r->eip);
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ConsoleCursorGoto(b); ConsoleWrite("cs=0x%x", r->cs);
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ConsoleCursorGoto(c); ConsoleWrite("eflags=0x%x", r->eflags);
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ConsoleCursorGoto(d); ConsoleWrite("useresp=0x%x\n", r->useresp);
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ConsoleCursorGoto(a); ConsoleWrite("gs=0x%x", r->ss);
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ConsoleCursorGoto(b); ConsoleWrite("fs=0x%x", r->int_no);
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ConsoleCursorGoto(c); ConsoleWrite("err_code=0x%x", r->err_code);
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// Useful info about page fault
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if (r->int_no == 0xE)
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{
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uint32 faulting_address;
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asm volatile("mov %%cr2, %0" : "=r" (faulting_address));
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ConsoleCursorGoto(d); ConsoleWrite("address=0x%x\n", faulting_address);
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ConsoleCursorGoto(a); ConsoleWrite("reason: ");
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if (!(r->err_code & 1)) ConsoleWrite("%#PAGE_NOT_PRESENT; ", ColorLightGray);
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if (r->err_code & 2) ConsoleWrite("%#WRITE_OPERATION; ", ColorLightGray);
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if (r->err_code & 4) ConsoleWrite("%#CPU_IN_USER_MODE; ", ColorLightGray);
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if (r->err_code & 8) ConsoleWrite("%#CPU_RESERVED_PAGE_ENTRY_OVERWRITTEN; ", ColorLightGray);
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if (r->err_code & 0x10) ConsoleWrite("%#INSTRUCTION_FETCH; ", ColorLightGray);
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}
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ConsoleSetDefaultColor(ColorLightRed);
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ConsoleWrite("\n");
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for (i = 0; i < 80; i++) ConsoleWrite("%c", 205);
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}
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