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103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
#include "handlers.h"
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#include "../arch/core_cr.h"
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#include "../arch/idt.h"
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#include "../arch/lapic.h"
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#include "../arch/system.h"
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#include "../debug/kernelpanic.h"
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#include "../debug/output.h"
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void printContext(const InterruptContext *context) {
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DBG << "ip: " << hex << context->cs << ':' << context->ip
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<< " sp: " << context->ss << ':' << context->sp << " flags" << bin
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<< context->flags << endl;
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}
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[[gnu::interrupt]] void handle_invalid_opcode(InterruptContext *context) {
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DBG << "Invalid opcode encoutered" << endl;
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printContext(context);
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kernelpanic("Invalid opcode!");
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}
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[[gnu::interrupt]] void handle_double_fault(InterruptContext *context,
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uint64_t error) {
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(void)error;
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DBG << "Double fault encoutered" << endl;
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printContext(context);
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kernelpanic("Double fault!");
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}
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[[gnu::interrupt]] void handle_invalid_tss(InterruptContext *context,
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uint64_t error) {
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DBG << "Invalid tss encoutered. Offending selector idx: " << dec << error
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<< endl;
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printContext(context);
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kernelpanic("Invalid TSS!");
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}
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[[gnu::interrupt]] void handle_general_protection_fault(
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InterruptContext *context, uint64_t error) {
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DBG << "General protection fault encoutered. Error code: " << dec << error
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<< endl;
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printContext(context);
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kernelpanic("General protection fault!");
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}
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enum PAGE_FAULT_ERROR {
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PF_ERR_PRESENT = 0x1,
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PF_ERR_WRITE = 0x2,
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PF_ERR_USER = 0x4,
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PF_ERR_RESERVED = 0x8,
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PF_ERR_IFETCH = 0x10,
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};
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[[gnu::interrupt]] void handle_page_fault(InterruptContext *context,
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uint64_t error) {
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(void)error;
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DBG << "Page fault encoutered at linear address " << hex
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<< Core::CR<2>::read() << endl
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<< (error & PF_ERR_PRESENT ? "present" : "non-present") << " page|"
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<< (error & PF_ERR_WRITE ? "write" : "read") << " access|"
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<< (error & PF_ERR_USER ? "user" : "supervisor") << "|"
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<< (error & PF_ERR_RESERVED ? "reserved bit int pte" : "") << "|"
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<< (error & PF_ERR_IFETCH ? "instrution" : "data") << " fetch|" << endl;
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printContext(context);
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kernelpanic("Page fault!");
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}
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void handle_keyboard() {}
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[[gnu::interrupt]] void handle_panic(InterruptContext *context) {
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(void)context;
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}
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[[gnu::interrupt]] void handle_timer(InterruptContext *context) {
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(void)context;
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}
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[[gnu::interrupt]] void handle_assassin(InterruptContext *context) {
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(void)context;
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}
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[[gnu::interrupt]] void handle_wakeup(InterruptContext *context) {
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(void)context;
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}
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void initInterruptHandlers() {
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// Some handlers that are useful for debugging
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IDT::set(Core::Interrupt::Vector::INVALID_OPCODE,
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IDT::InterruptDescriptor::Returning(handle_invalid_opcode));
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IDT::set(Core::Interrupt::Vector::DOUBLE_FAULT,
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IDT::InterruptDescriptor::DivergingWithError(handle_double_fault));
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IDT::set(Core::Interrupt::Vector::INVALID_TSS,
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IDT::InterruptDescriptor::ReturningWithError(handle_invalid_tss));
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IDT::set(Core::Interrupt::Vector::GENERAL_PROTECTION_FAULT,
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IDT::InterruptDescriptor::ReturningWithError(
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handle_general_protection_fault));
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IDT::set(Core::Interrupt::Vector::PAGE_FAULT,
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IDT::InterruptDescriptor::ReturningWithError(handle_page_fault));
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// TODO: Add more handlers here
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// Load the idt pointer
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IDT::load();
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}
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