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00008144141e[CPU0 ] exception(): 3rd (13) exception with no resolution, shutdown status is 00h, resetting
00008144141i[CPU0 ] protected mode
00008144141i[CPU0 ] CS.d_b = 32 bit
00008144141i[CPU0 ] SS.d_b = 32 bit
00008144141i[CPU0 ] EFER = 0x00000000
00008144141i[CPU0 ] | RAX=0000000001105fec RBX=000000000002d100
00008144141i[CPU0 ] | RCX=00000000000000fe RDX=00000000ff000021
00008144141i[CPU0 ] | RSP=0000000001105fc8 RBP=0000000001105ff0
00008144141i[CPU0 ] | RSI=000000000002d53a RDI=000000000002d53f
00008144141i[CPU0 ] | IOPL=0 of df IF sf zf af pf cf
00008144141i[CPU0 ] | SEG selector base limit G D
00008144141i[CPU0 ] | SEG sltr(index|ti|rpl) base limit G D
00008144141i[CPU0 ] | CS:0008( 0001| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | DS:0010( 0002| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | SS:0010( 0002| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | ES:0010( 0002| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | FS:0010( 0002| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | GS:0010( 0002| 0| 0) 00000000 000fffff 1 1
00008144141i[CPU0 ] | RIP=00000000011008ff (00000000011008ff)
00008144141i[CPU0 ] | CR0=0x00000011 CR1=0x0 CR2=0x0000000000000000
00008144141i[CPU0 ] | CR3=0x0000000000000000 CR4=0x00000000
void kmain ( MultibootInfo mb ) {
IDT idt;
GDT gdt;
int i;
kinitstdout(WHITE, BLACK);
initializeGDT(&gdt, 0x90000);
initializeIDT(&idt, 0x8FF01);
flushGDT(gdt.pGDT);
for(i = 0; i < 0x0F; i++) {
addExceptionHandler(&idt, i, exceptionHandler, 0x08);
}
for(i = IRQ0; i < 0xFF; i++) {
addInterruptHandler(&idt, i, interruptHandler, 0x08);
}
asm("sti");
i = 0;
i = 1 / i;
for(;;);
}
void initializeGDT( GDT *gdt, unsigned int base) {
gdt->pGDT.base = base;
gdt->pGDT.limit = (sizeof(GDTDescriptor) * 3) - 1;
gdt->descriptors = (GDTDescriptor *)base;
// <null descriptor>
gdt->descriptors[0].limit_low = 0;
gdt->descriptors[0].base_low = 0;
gdt->descriptors[0].base_mid = 0;
gdt->descriptors[0].type_flags = 0;
gdt->descriptors[0].limit_high_access = 0;
gdt->descriptors[0].base_high = 0;
addGDTDescriptor(gdt, 1, 0, 0xFFFFFFFF, SEG_TYPE_CODE_ER, 0,
RING0, 1,
GRANULARITY_4K); // code descriptor
addGDTDescriptor(gdt, 2, 0, 0xFFFFFFFF, SEG_TYPE_DATA_RW, 0,
RING0, 1,
GRANULARITY_4K); // data descriptor
asm("lgdt %0" : : "m" (gdt->pGDT));
return;
}
void initializeIDT ( IDT *idt, unsigned int base ) {
idt->pIDT.base = base;
idt->pIDT.limit = 0xFF;
idt->descriptors = (IDTDescriptor *)base;
remapPIC(IRQ0);
asm("lidt %0" : : "m" (idt->pIDT));
}
gcc -ffreestanding -Os -c -Iinclude\ -o video.obj src\kernel\video.c
OUTPUT_FORMAT("binary")
INPUT(kernel32.obj kernel.obj video.obj)
ENTRY(start)
SECTIONS
{
.text 0x10000 : {
code = .; _code = .; __code = .;
*(.text)
. = ALIGN(1);
}
.data : {
data = .; _data = .; __data = .;
*(.data)
. = ALIGN(1);
}
.bss :
{
bss = .; _bss = .; __bss = .;
*(.bss)
. = ALIGN(1);
}
end = .; _end = .; __end = .;
}
ld -Tlink.txt -o out\kernel.bin
)
char *vm = (char *)0xb8000;
void printc(char c)
{
*vm++;
*vm = c;
*vm++;
*vm = 7;
}
.
.