kvisc/ka/sys/main.k

; The OS/K Team licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.

PrintBootMsg:
    call print, .bootmsg
    ret

.bootmsg = "Starting DOS...\n\n"

;
; Initialize TRAP handlers
;
InitSyscalls:
    mov ax0, 1
    call RFS.ActivateFrame

    mov ax1, $rip
    mov ax2, DefaultTrapHandler
    call RFS.StoreReg

    mov ax0, 256
    mov ax1, 1
    call IDT.AddHandler

    ret

InitExcepts:
    mov ax0, 2
    call RFS.ActivateFrame

    mov ax1, $rip
    mov ax2, DefaultExceptionHandler
    call RFS.StoreReg

    mov ax0, zero
    mov ax1, 2
    call IDT.AddHandler

SwitchToCMD:
    mov rax, Sys.Exit
    trap 0

;
; Main function
;
main:
    call PrintBootMsg
    call InitSyscalls
    call InitExcepts
    call SwitchToCMD
    ret