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os-k/kaleid/kernel/cpu/isr.asm

173 lines
4.2 KiB
NASM

;=----------------------------------------------------------------------------=;
; GNU GPL OS/K ;
; ;
; Desc: Interrupt Descriptor Table related functions ;
; ;
; ;
; Copyright © 2018-2019 The OS/K Team ;
; ;
; This file is part of OS/K. ;
; ;
; OS/K is free software: you can redistribute it and/or modify ;
; it under the terms of the GNU General Public License as published by ;
; the Free Software Foundation, either version 3 of the License, or ;
; (at your option) any later version. ;
; ;
; OS/K is distributed in the hope that it will be useful, ;
; but WITHOUT ANY WARRANTY; without even the implied warranty of ;
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;
; GNU General Public License for more details. ;
; ;
; You should have received a copy of the GNU General Public License ;
; along with OS/K. If not, see <https://www.gnu.org/licenses/>. ;
;=----------------------------------------------------------------------------=;
%include "kaleid/kernel/cpu/isr.inc"
global IdtInit
global divideByZero
extern idtPtr
extern IsrHandler
extern label0
;;
;; Loads the IDT
;;
IdtInit:
lidt [idtPtr]
ret
;;
;; Bug test
;;
divideByZero:
mov eax, 17
mov ebx, 0
xor edx, edx
div ebx
ret
;;
;; ISR Exception pre-handler
;;
isrPreHandler:
pushAll
; Check if we are switching from user mode to supervisor mode
mov rax, [rsp + 152]
and rax, 0x3000
jz .SEnter
swapgs ; XXX need TSS
.SEnter:
; Increment mask count as we configure all interrupts to mask IF
; automatically in the IDT
inc qword [gs:8]
; Call the C routine for dispatching an interrupt
cld ; DF must be cleared by the caller
mov rdi, rsp ; First argument points to the processor state
mov rbp, 0 ; Terminate stack traces here
call IsrHandler
; decrement mask count
dec qword [gs:8]
; check if we are switching from supervisor to user mode
mov rax, [rsp + 152]
and rax, 0x3000
jz .SExit
swapgs ; XXX need TSS
.SExit:
popAll
; pop the error code and interrupt id
add rsp, 16
iretq
;; Divide Error Fault
IsrWithoutErrCode 0
;; Debug Exception Fault/trap
IsrWithoutErrCode 1
;; NMI Interrupt
IsrWithoutErrCode 2
;; Breakpoint Trap
IsrWithoutErrCode 3
;; Overflow Trap
IsrWithoutErrCode 4
;; Bound Range Exceeded Fault
IsrWithoutErrCode 5
;; Invalid Opcode Fault
IsrWithoutErrCode 6
;; Device Not Available or No Math Coprocessor Fault
IsrWithoutErrCode 7
;; Coprocessor Segment Overrun Fault
IsrWithoutErrCode 9
;; x87 FPU Floating Point or Math Fault
IsrWithoutErrCode 16
;; Alignment Check Fault
IsrWithoutErrCode 17
;; Machine Check Abort
IsrWithoutErrCode 18
;; SIMD Floating Point Fault
IsrWithoutErrCode 19
;; Virtualization Exception Fault
IsrWithoutErrCode 20
;; Double Fault Abort
IsrWithErrCode 8
;; Invalid TSS Fault
IsrWithErrCode 10
;; Segment Not Present Fault
IsrWithErrCode 11
;; Stack Segment Fault
IsrWithErrCode 12
;; General Protection Fault
IsrWithErrCode 13
;; Page Fault
IsrWithErrCode 14
;; Reserved
IsrWithoutErrCode 15
IsrWithoutErrCode 21
IsrWithoutErrCode 22
IsrWithoutErrCode 23
IsrWithoutErrCode 24
IsrWithoutErrCode 25
IsrWithoutErrCode 26
IsrWithoutErrCode 27
IsrWithoutErrCode 28
IsrWithoutErrCode 29
IsrWithoutErrCode 30
IsrWithoutErrCode 31
;; IRQs
%assign i 32
%rep 225
IsrWithoutErrCode i
%assign i i+1
%endrep