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Kernel panic

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Ben
2019-04-30 19:32:23 +01:00
parent fdff77afd1
commit 390fc87c20
18 changed files with 323 additions and 90 deletions
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13
kernel/gdt.cpp
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@@ -25,24 +25,23 @@ void lgdt(GDT_t GDT) {
asm ("lgdt %0" : : "m"(GDT));
}
void initGDT() {
#define BochsBreak() outw(0x8A00,0x8A00); outw(0x8A00,0x08AE0);
int InitGDT() {
_GDTptr.limit = (sizeof(SegmentDescriptor_t) * 5) - 1;
_GDTptr.base = (uint32_t)&_GDT;
// Null segment
setGDTGate(0, 0, 0, 0, 0);
SetGDTGate(0, 0, 0, 0, 0);
// Code Base 0 limit 32 Access EXEC + RW
setGDTGate(1, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_EXEC | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
SetGDTGate(1, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_EXEC | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
// Data Base 0 Limit 32 Access RW
setGDTGate(2, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
SetGDTGate(2, 0x00000000, 0xFFFFFFFF, GDT_ACCESS_PRESENT | GDT_ACCESS_RW, GDT_FLAG_GR_PAGE | GDT_FLAG_SZ_32B);
lgdt(_GDTptr);
BochsBreak();
SEGMENTS_RELOAD();
return 1;
}
void setGDTGate(uint32_t index, uint32_t baseAddr, uint32_t limitAddr, uint8_t accessLvl, uint8_t flags) {
void SetGDTGate(uint32_t index, uint32_t baseAddr, uint32_t limitAddr, uint8_t accessLvl, uint8_t flags) {
if (index > 5) return;
_GDT[index].base_low = (baseAddr & 0xFFFF);
_GDT[index].base_middle = (baseAddr >> 16) & 0xFF;