From f1dee4bc58e4bfb97a1b41831c5d4fc327882991 Mon Sep 17 00:00:00 2001 From: Nic Gaffney Date: Mon, 5 Feb 2024 22:28:34 -0600 Subject: random shit --- src/kernel/idt.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) (limited to 'src/kernel/idt.c') diff --git a/src/kernel/idt.c b/src/kernel/idt.c index f3fea4f..2805889 100644 --- a/src/kernel/idt.c +++ b/src/kernel/idt.c @@ -2,27 +2,22 @@ #include "gdt.h" #include -IDT_t idt = (IDT_t)0x7fffe; +static Gate_Descriptor_t idt[256]; extern GDTR_t idtr; void get_idtr() { - int base = 0x7fffe; - uint8_t code_seg = (0b1000 << 3) | 0b000; - - // idtr.size = sizeof(Gate_Descriptor_t) * n - 1; - idtr.size = 0; - idtr.offset = base; + idtr.offset = (uintptr_t)&idt[0]; + idtr.size = sizeof(Gate_Descriptor_t) * 256 - 1; + for (uint8_t vec = 0; vec < 32; vec++) { + make_gate(stub_table[vec], 0x8E, vec); + } } -Gate_Descriptor_t make_gate(uint32_t offset, uint8_t segment_selector, - uint8_t type) { - Gate_Descriptor_t ret = (Gate_Descriptor_t){ - .offset_low = offset, - .reserved = 0, - .attrs = (0b1000 << 4) | type, - .offset_high = offset >> 16, - .segment_selector = segment_selector, - }; +void make_gate(uint32_t offset, uint8_t attrs, uint8_t vec) { + Gate_Descriptor_t *descriptor = &idt[vec]; - return ret; + descriptor->offset_low = offset & 0xFFFF; + descriptor->attrs = (0b1000 << 4) | attrs; + descriptor->offset_high = offset >> 16, descriptor->segment_selector = 0x08; + descriptor->reserved = 0; } -- cgit v1.2.3