173 lines
4.2 KiB
NASM
173 lines
4.2 KiB
NASM
;=----------------------------------------------------------------------------=;
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; GNU GPL OS/K ;
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; ;
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; Desc: Interrupt Descriptor Table related functions ;
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; ;
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; ;
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; Copyright © 2018-2019 The OS/K Team ;
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; ;
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; This file is part of OS/K. ;
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; ;
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; OS/K 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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; OS/K 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 OS/K. If not, see <https://www.gnu.org/licenses/>. ;
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;=----------------------------------------------------------------------------=;
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%include "kaleid/kernel/cpu/isr.inc"
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global IdtInit
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global divideByZero
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extern idtPtr
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extern IsrHandler
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extern label0
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;;
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;; Loads the IDT
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;;
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IdtInit:
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lidt [idtPtr]
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ret
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;;
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;; Bug test
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;;
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divideByZero:
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mov eax, 17
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mov ebx, 0
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xor edx, edx
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div ebx
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ret
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;;
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;; ISR Exception pre-handler
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;;
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isrPreHandler:
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pushAll
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; Check if we are switching from user mode to supervisor mode
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mov rax, [rsp + 152]
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and rax, 0x3000
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jz .SEnter
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swapgs ; XXX need TSS
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.SEnter:
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; Increment mask count as we configure all interrupts to mask IF
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; automatically in the IDT
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inc qword [gs:8]
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; Call the C routine for dispatching an interrupt
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cld ; DF must be cleared by the caller
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mov rdi, rsp ; First argument points to the processor state
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mov rbp, 0 ; Terminate stack traces here
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call IsrHandler
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; decrement mask count
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dec qword [gs:8]
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; check if we are switching from supervisor to user mode
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mov rax, [rsp + 152]
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and rax, 0x3000
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jz .SExit
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swapgs ; XXX need TSS
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.SExit:
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popAll
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; pop the error code and interrupt id
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add rsp, 16
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iretq
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;; Divide Error Fault
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IsrWithoutErrCode 0
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;; Debug Exception Fault/trap
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IsrWithoutErrCode 1
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;; NMI Interrupt
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IsrWithoutErrCode 2
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;; Breakpoint Trap
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IsrWithoutErrCode 3
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;; Overflow Trap
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IsrWithoutErrCode 4
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;; Bound Range Exceeded Fault
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IsrWithoutErrCode 5
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;; Invalid Opcode Fault
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IsrWithoutErrCode 6
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;; Device Not Available or No Math Coprocessor Fault
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IsrWithoutErrCode 7
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;; Coprocessor Segment Overrun Fault
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IsrWithoutErrCode 9
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;; x87 FPU Floating Point or Math Fault
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IsrWithoutErrCode 16
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;; Alignment Check Fault
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IsrWithoutErrCode 17
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;; Machine Check Abort
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IsrWithoutErrCode 18
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;; SIMD Floating Point Fault
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IsrWithoutErrCode 19
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;; Virtualization Exception Fault
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IsrWithoutErrCode 20
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;; Double Fault Abort
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IsrWithErrCode 8
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;; Invalid TSS Fault
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IsrWithErrCode 10
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;; Segment Not Present Fault
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IsrWithErrCode 11
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;; Stack Segment Fault
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IsrWithErrCode 12
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;; General Protection Fault
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IsrWithErrCode 13
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;; Page Fault
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IsrWithErrCode 14
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;; Reserved
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IsrWithoutErrCode 15
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IsrWithoutErrCode 21
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IsrWithoutErrCode 22
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IsrWithoutErrCode 23
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IsrWithoutErrCode 24
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IsrWithoutErrCode 25
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IsrWithoutErrCode 26
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IsrWithoutErrCode 27
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IsrWithoutErrCode 28
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IsrWithoutErrCode 29
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IsrWithoutErrCode 30
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IsrWithoutErrCode 31
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;; IRQs
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%assign i 32
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%rep 225
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IsrWithoutErrCode i
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%assign i i+1
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%endrep
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