65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/**
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* IDT section header of rockOS
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* Copyright (C) 2022 Furkan Mudanyali
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, _either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef _ROCKOS_IDT_H
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#define _ROCKOS_IDT_H
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#include <stdint.h>
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#define IDT_MAX_DESCRIPTORS 256
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typedef struct {
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uint16_t isr_low; // lower 16-bits of ISR address
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uint16_t kernel_cs; // The GDT selector that the CPU will load into CS before calling ISR
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uint8_t reserved; // set to zero
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uint8_t flags; // Type and attributes
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uint16_t isr_high; // Higher 16-bits of ISR address
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} __attribute__((packed)) idt_entry_t;
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typedef struct {
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uint16_t limit;
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uint32_t base;
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} __attribute__((packed)) idtr_t;
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static idtr_t idtptr;
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static char* err_msg[] = {
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"#DE Divide Error!",
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"#DB Debug Exception!",
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"NMI Interrupt!",
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"#BP Breakpoint!",
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"#OF Overflow!",
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"#BR Bound Range Exceeded!",
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"#Invalid Opcode (Undefined Opcode)!",
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"#NM Device Not Available (No Math Coprocessor)!",
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"#DF Double Fault!",
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"Coprocessor Segment Overrun (reserved)!",
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"#TS Invalid TSS!",
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"#NP Segment Not Present!",
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"#SS Stack-Segment Fault!",
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"#GP General Protection!",
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"#PF Page Fault!",
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"Unknown Reserved Fault 15!",
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"#MF x87 FPU Floating-Point Error (Math Fault)!",
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"#AC Alignment Check!",
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"#MC Machine Check!",
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"#XM SIMD Floating-Point Exception!",
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"#VE Virtualization Exception!",
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"#CP Control Protection Exception!"
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};
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#endif |