Subversion Repositories Kolibri OS

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

;;                                                              ;;

;;                                                              ;;

;;  MenuetOS process management, protected ring3                ;;

;;                                                              ;;

;;  Distributed under GPL. See file COPYING for details.        ;;

;;  Copyright 2003 Ville Turjanmaa                              ;;

;;                                                              ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision: 1369 $

align 4 ;3A08

build_interrupt_table:

        mov     edi, idts

        mov     esi, sys_int

        mov     ecx, 0x40

        mov     eax, (10001110b shl 24) + os_code

  @@:   movsw   ;low word of code-entry

        stosd   ;interrupt gate type : os_code selector

        movsw   ;high word of code-entry

        loop    @b

        movsd   ;copy low  dword of trap gate for int 0x40

        movsd   ;copy high dword of trap gate for int 0x40

        lidt    [esi]

        ret

iglobal

  align 4

  sys_int:

    ;exception handlers addresses (for interrupt gate construction)

        dd      e0,e1,e2,e3,e4,e5,e6,except_7 ; SEE: core/fpu.inc

        dd      e8,e9,e10,e11,e12,e13,page_fault_exc,e15

        dd      e16, e17,e18, e19

        times   12 dd unknown_interrupt ;int_20..int_31

    ;interrupt handlers addresses (for interrupt gate construction)

        dd      irq0, irq_serv.irq_1, irq_serv.irq_2

    if  USE_COM_IRQ

        dd      irq_serv.irq_3, irq_serv.irq_4

    else

        dd      p_irq3, p_irq4 ;??? íåñòûêîâêà

    end if

        dd      irq_serv.irq_5,  p_irq6,          irq_serv.irq_7

        dd      irq_serv.irq_8,  irq_serv.irq_9,  irq_serv.irq_10

        dd      irq_serv.irq_11, irq_serv.irq_12, irqD,p_irq14,p_irq15

        times   16 dd unknown_interrupt ;int_0x30..int_0x3F

    ;int_0x40 gate trap (for directly copied)

        dw      i40 and 0xFFFF, os_code, 11101111b shl 8, i40 shr 16

  idtreg: ; data for LIDT instruction (!!! must be immediately below sys_int data)

        dw      2*($-sys_int-4)-1

        dd      idts ;0x8000B100

        dw      0    ;ïðîñòî âûðàâíèâàíèå

  msg_fault_sel dd  msg_exc_8,msg_exc_u,msg_exc_a,msg_exc_b

                dd  msg_exc_c,msg_exc_d,msg_exc_e

  msg_exc_8     db "Double fault", 0

  msg_exc_u     db "Undefined Exception", 0

  msg_exc_a     db "Invalid TSS", 0

  msg_exc_b     db "Segment not present", 0

  msg_exc_c     db "Stack fault", 0

  msg_exc_d     db "General protection fault", 0

  msg_exc_e     db "Page fault", 0

  msg_sel_ker   db "kernel", 0

  msg_sel_app   db "application", 0

endg

macro save_ring3_context {

        pushad

}

macro restore_ring3_context {

        popad

}

macro exc_wo_code [num] {

  e#num :

        save_ring3_context

        mov     bl, num

        jmp     exc_c

} exc_wo_code   0,1,2,3,4,5,6,15,16,19

macro exc_w_code [num] {

  e#num :

        add     esp, 4

        save_ring3_context

        mov     bl, num

        jmp     exc_c

} exc_w_code    8,9,10,11,12,13,17,18

uglobal

  pf_err_code   dd ?

endg

page_fault_exc:                 ; äóðàêîóñòî÷èâîñòü: ñåëåêòîðû èñïîð÷åíû...

        pop     [ss:pf_err_code]; äåéñòâèòåëüíî äî ñëåäóþùåãî #PF

        save_ring3_context

        mov     bl,14

exc_c:                          ; èñêëþ÷åíèÿ (âñå, êðîìå 7-ãî - #NM)

; Ôðýéì ñòåêà ïðè èñêëþ÷åíèè/ïðåðûâàíèè èç 3-ãî êîëüöà + pushad (ò.å., èìåííî çäåñü)

  reg_ss        equ esp+0x30

  reg_esp3      equ esp+0x2C

  reg_eflags    equ esp+0x28

  reg_cs3       equ esp+0x24

  reg_eip       equ esp+0x20

 ; ýòî ôðýéì îò pushad

  reg_eax       equ esp+0x1C

  reg_ecx       equ esp+0x18

  reg_edx       equ esp+0x14

  reg_ebx       equ esp+0x10

  reg_esp0      equ esp+0x0C

  reg_ebp       equ esp+0x08

  reg_esi       equ esp+0x04

  reg_edi       equ esp+0x00

        Mov     ds,ax,app_data  ; çàãðóçèì ïðàâèëüíûå çíà÷åíèÿ

        mov     es,ax           ; â ñåãìåíòíûå ðåãèñòðû

        cld                     ; è ïðèâîäèì DF ê ñòàíäàðòó

        movzx   ebx,bl

; redirect to V86 manager? (EFLAGS & 0x20000) != 0?

        test    byte[reg_eflags+2],2

        jnz     v86_exc_c

        cmp     bl,14           ; #PF

        jne     @f

        call    page_fault_handler ; SEE: core/memory.inc

  @@:   mov     esi, [current_slot]

        btr     [esi+APPDATA.except_mask], ebx

        jnc     @f

        mov     eax,[esi+APPDATA.exc_handler]

        test    eax, eax

        jnz     IRetToUserHook

  @@:   cli

        mov     eax, [esi+APPDATA.debugger_slot]

        test    eax, eax

        jnz     .debug

        sti

; not debuggee => say error and terminate

        call    show_error_parameters ;; only ONE using, inline ???

       ;mov     edx, [TASK_BASE]

        mov     [edx + TASKDATA.state], byte 4 ; terminate

        jmp     change_task     ; stack - here it does not matter at all, SEE: core/shed.inc

.debug:

; we are debugged process, notify debugger and suspend ourself

; eax=debugger PID

        mov     ecx,1           ; debug_message code=other_exception

        cmp     bl,1            ; #DB

        jne     .notify         ; notify debugger and suspend ourself

        mov     ebx, dr6        ; debug_message data=DR6_image

        xor     edx, edx

        mov     dr6, edx

        mov     edx, dr7

        mov     cl, not 8

  .l1:  shl     dl,2

        jc      @f

        and     bl, cl

  @@:   sar     cl,1

        jc      .l1

        mov     cl, 3           ; debug_message code=debug_exception

.notify:

        push    ebx             ; debug_message data

        mov     ebx, [TASK_BASE]

        push    [ebx+TASKDATA.pid] ; PID

        push    ecx             ; debug_message code ((here: ecx==1/3))

        mov     cl, 12          ; debug_message size

        call    debugger_notify ;; only ONE using, inline ??? SEE: core/debug.inc

        add     esp,12

        mov     edx, [TASK_BASE]

        mov     byte [edx+TASKDATA.state], 1 ; suspended

        call    change_task     ; SEE: core/shed.inc

        restore_ring3_context

        iretd

IRetToUserHook:

        xchg    eax, [reg_eip]

        sub     dword[reg_esp3], 8

        mov     edi, [reg_esp3]

        stosd

        mov     [edi], ebx

        restore_ring3_context

unknown_interrupt:

        iretd

;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

show_error_parameters:

        mov     edx,[TASK_BASE] ;not scratched below

        DEBUGF  1, "K : Process - forced terminate PID: %x\n", [edx+TASKDATA.pid]

        cmp     bl, 0x08

        jb      .l0

        cmp     bl, 0x0e

        jbe     .l1

  .l0:  mov     bl, 0x09

  .l1:  mov     eax,[msg_fault_sel+ebx*4 - 0x08*4]

        DEBUGF  1, "K : %s\n", eax

        mov     eax, [reg_cs3+4]

        mov     edi, msg_sel_app

        mov     ebx, [reg_esp3+4]

        cmp     eax, app_code

        je      @f

        mov     edi, msg_sel_ker

        mov     ebx, [reg_esp0+4]

    @@: DEBUGF  1, "K : EAX : %x EBX : %x ECX : %x\n", [reg_eax+4], [reg_ebx+4], [reg_ecx+4]

        DEBUGF  1, "K : EDX : %x ESI : %x EDI : %x\n", [reg_edx+4], [reg_esi+4], [reg_edi+4]

        DEBUGF  1, "K : EBP : %x EIP : %x ESP : %x\n", [reg_ebp+4], [reg_eip+4], ebx

        DEBUGF  1, "K : Flags : %x CS : %x (%s)\n", [reg_eflags+4], eax, edi

        ret

;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

  restore  reg_ss

  restore  reg_esp3

  restore  reg_eflags

  restore  reg_cs

  restore  reg_eip

  restore  reg_eax

  restore  reg_ecx

  restore  reg_edx

  restore  reg_ebx

  restore  reg_esp0

  restore  reg_ebp

  restore  reg_esi

  restore  reg_edi

; irq1  ->  hid/keyboard.inc

macro irqh [num] {

  p_irq#num :

        mov     edi, num

        jmp     irqhandler

}

p_irq6:

        save_ring3_context

        mov     ax, app_data  ;os_data

        mov     ds, ax

        mov     es, ax

        mov     edi, 6

        cmp     [v86_irqhooks+edi*8], 0

        jnz     v86_irq2

        call    fdc_irq

        call    ready_for_next_irq

        restore_ring3_context

        iret

p_irq14:

        save_ring3_context

        mov     ax, app_data  ;os_data

        mov     ds, ax

        mov     es, ax

        mov     edi, 14

        cmp     [v86_irqhooks+edi*8], 0

        jnz     v86_irq2

;       mov     byte [BOOT_VAR + 0x48E], 0xFF

        call    [irq14_func]

        call    ready_for_next_irq_1

        restore_ring3_context

        iret

p_irq15:

        save_ring3_context

        mov     ax, app_data  ;os_data

        mov     ds, ax

        mov     es, ax

        mov     edi, 15

        cmp     [v86_irqhooks+edi*8], 0

        jnz     v86_irq2

;       mov     byte [BOOT_VAR + 0x48E], 0xFF

        call    [irq15_func]

        call    ready_for_next_irq_1

        restore_ring3_context

        iret

ready_for_next_irq:

	mov	eax,5

        mov     [check_idle_semaphore],eax

;        mov     al, 0x20

	add 	eax,(0x20-0x5)

        out     0x20, al

        ret

;destroy eax

ready_for_next_irq_1:

	mov	eax,5

        mov     [check_idle_semaphore],eax

;        mov     al, 0x20

	add 	eax,(0x20-0x5)

        out     0xa0,al

        out     0x20, al

        ret

irqD:

        push  eax

	xor   eax,eax

        out   0xf0,al

        mov   al,0x20

        out   0xa0,al

        out   0x20,al

        pop   eax

        iret

irqh 2,3,4,5,7,8,9,10,11

irqhandler:

     mov    esi,edi          ; 1

     shl    esi,6            ; 1

     add    esi,irq00read    ; 1

     shl    edi,12           ; 1

     add    edi,IRQ_SAVE

     mov    ecx,16

   irqnewread:

     dec    ecx

     js     irqover

     movzx  edx, word [esi]        ; 2+

     test   edx, edx               ; 1

     jz     irqover

     mov    ebx, [edi]             ; address of begin of buffer in edi      ; + 0x0 dword - data size

     mov    eax, 4000                                                       ; + 0x4 dword - data begin offset

     cmp    ebx, eax

     je     irqfull

     add    ebx, [edi + 0x4]       ; add data size to data begin offset

     cmp    ebx, eax               ; if end of buffer, begin cycle again

     jb     @f

     xor    ebx, ebx

  @@:

     add    ebx, edi

     movzx  eax, byte[esi + 3]     ; get type of data being received 1 - byte, 2 - word

     dec    eax

     jz     irqbyte

     dec    eax

     jnz    noirqword

     in     ax,dx

     cmp    ebx, 3999              ; check for address odd in the end of buffer

     jne    .odd

     mov    [ebx + 0x10], ax

     jmp    .add_size

  .odd:

     mov    [ebx + 0x10], al       ; I could make mistake here :)

     mov    [edi + 0x10], ah

  .add_size:

     add    dword [edi], 2

     jmp    nextport

  irqbyte:

     in     al,dx

     mov    [ebx + 0x10],al

     inc    dword [edi]

  nextport:

     add    esi,4

     jmp    irqnewread

   noirqword:

   irqfull:

   irqover:

     ret

set_application_table_status:

        push eax

        mov  eax,[CURRENT_TASK]

        shl  eax, 5

        add  eax,CURRENT_TASK+TASKDATA.pid

        mov  eax,[eax]

        mov  [application_table_status],eax

        pop  eax

        ret

clear_application_table_status:

        push eax

        mov  eax,[CURRENT_TASK]

        shl  eax, 5

        add  eax,CURRENT_TASK+TASKDATA.pid

        mov  eax,[eax]

        cmp  eax,[application_table_status]

        jne  apptsl1

	xor  eax,eax

        mov  [application_table_status],eax

      apptsl1:

        pop  eax

        ret

;  * eax = 64 - íîìåð ôóíêöèè

;  * ebx = 1 - åäèíñòâåííàÿ ïîäôóíêöèÿ

;  * ecx = íîâûé ðàçìåð ïàìÿòè

;Âîçâðàùàåìîå çíà÷åíèå:

;  * eax = 0 - óñïåøíî

;  * eax = 1 - íåäîñòàòî÷íî ïàìÿòè

sys_resize_app_memory:

        ; ebx = 1 - resize

        ; ecx = new amount of memory

;        cmp    eax,1

	dec	ebx

        jnz    .no_application_mem_resize

        stdcall new_mem_resize, ecx

        mov [esp+32], eax

.no_application_mem_resize:

        ret

iglobal

;  process_terminating  db 'K : Process - terminating',13,10,0

;  process_terminated   db 'K : Process - done',13,10,0

  msg_obj_destroy       db 'K : destroy app object',13,10,0

endg

; param

;  esi= slot

terminate: ; terminate application

           .slot equ esp   ;locals

           push   esi      ;save .slot

           shl esi, 8

           cmp [SLOT_BASE+esi+APPDATA.dir_table], 0

           jne @F

           pop    esi

           shl    esi, 5

           mov    [CURRENT_TASK+esi+TASKDATA.state], 9

           ret

@@:

           ;mov    esi,process_terminating

           ;call   sys_msg_board_str

@@:

           cli

           cmp   [application_table_status],0

           je    term9

           sti

           call  change_task

           jmp   @b

term9:

           call  set_application_table_status

; if the process is in V86 mode...

        mov     eax, [.slot]

        shl     eax, 8

        mov     esi, [eax+SLOT_BASE+APPDATA.pl0_stack]

        add     esi, RING0_STACK_SIZE

        cmp     [eax+SLOT_BASE+APPDATA.saved_esp0], esi

        jz      .nov86

; ...it has page directory for V86 mode

        mov     esi, [eax+SLOT_BASE+APPDATA.saved_esp0]

        mov     ecx, [esi+4]

        mov     [eax+SLOT_BASE+APPDATA.dir_table], ecx

; ...and I/O permission map for V86 mode

        mov     ecx, [esi+12]

        mov     [eax+SLOT_BASE+APPDATA.io_map], ecx

        mov     ecx, [esi+8]

        mov     [eax+SLOT_BASE+APPDATA.io_map+4], ecx

.nov86:

           mov esi, [.slot]

           shl esi,8

           add esi, SLOT_BASE+APP_OBJ_OFFSET

@@:

           mov eax, [esi+APPOBJ.fd]

           test eax, eax

           jz @F

           cmp eax, esi

           je @F

           push esi

           call [eax+APPOBJ.destroy]

           DEBUGF 1,"%s",msg_obj_destroy

           pop esi

           jmp @B

@@:

           mov eax, [.slot]

           shl eax, 8

           stdcall destroy_app_space, [SLOT_BASE+eax+APPDATA.dir_table], [SLOT_BASE+eax+APPDATA.dlls_list_ptr]

           mov esi, [.slot]

           cmp [fpu_owner],esi   ; if user fpu last -> fpu user = 1

           jne @F

           mov [fpu_owner],1

           mov eax, [256+SLOT_BASE+APPDATA.fpu_state]

           clts

           bt [cpu_caps], CAPS_SSE

           jnc .no_SSE

           fxrstor [eax]

           jmp @F

.no_SSE:

           fnclex

           frstor [eax]

@@:

    mov   [KEY_COUNT],byte 0           ; empty keyboard buffer

    mov   [BTN_COUNT],byte 0           ; empty button buffer

; remove defined hotkeys

        mov     eax, hotkey_list

.loop:

        cmp     [eax+8], esi

        jnz     .cont

        mov     ecx, [eax]

        jecxz   @f

        push    dword [eax+12]

        pop     dword [ecx+12]

@@:

        mov     ecx, [eax+12]

        push    dword [eax]

        pop     dword [ecx]

        xor     ecx, ecx

        mov     [eax], ecx

        mov     [eax+4], ecx

        mov     [eax+8], ecx

        mov     [eax+12], ecx

.cont:

        add     eax, 16

        cmp     eax, hotkey_list+256*16

        jb      .loop

; remove hotkeys in buffer

        mov     eax, hotkey_buffer

.loop2:

        cmp     [eax], esi

        jnz     .cont2

        and     dword [eax+4], 0

        and     dword [eax], 0

.cont2:

        add     eax, 8

        cmp     eax, hotkey_buffer+120*8

        jb      .loop2

    mov   ecx,esi                 ; remove buttons

  bnewba2:

    mov   edi,[BTN_ADDR]

    mov   eax,edi

    cld

    movzx ebx,word [edi]

    inc   bx

  bnewba:

    dec   bx

    jz    bnmba

    add   eax,0x10

    cmp   cx,[eax]

    jnz   bnewba

    pusha

    mov   ecx,ebx

    inc   ecx

    shl   ecx,4

    mov   ebx,eax

    add   eax,0x10

    call  memmove

    dec   dword [edi]

    popa

    jmp   bnewba2

  bnmba:

    pusha     ; save window coordinates for window restoring

    cld

    shl   esi,5

    add   esi,window_data

    mov   eax,[esi+WDATA.box.left]

    mov   [draw_limits.left],eax

    add   eax,[esi+WDATA.box.width]

    mov   [draw_limits.right],eax

    mov   eax,[esi+WDATA.box.top]

    mov   [draw_limits.top],eax

    add   eax,[esi+WDATA.box.height]

    mov   [draw_limits.bottom],eax

    xor   eax, eax

    mov   [esi+WDATA.box.left],eax

    mov   [esi+WDATA.box.width],eax

    mov   [esi+WDATA.box.top],eax

    mov   [esi+WDATA.box.height],eax

    mov   [esi+WDATA.cl_workarea],eax

    mov   [esi+WDATA.cl_titlebar],eax

    mov   [esi+WDATA.cl_frames],eax

    mov   dword [esi+WDATA.reserved],eax ; clear all flags: wstate, redraw, wdrawn

    lea   edi, [esi-window_data+draw_data]

    mov   ecx,32/4

    rep   stosd

    popa

; debuggee test

    pushad

    mov  edi, esi

    shl  edi, 5

    mov  eax, [SLOT_BASE+edi*8+APPDATA.debugger_slot]

    test eax, eax

    jz   .nodebug

    push 8

    pop  ecx

    push dword [CURRENT_TASK+edi+TASKDATA.pid]   ; PID

    push 2

    call debugger_notify

    pop  ecx

    pop  ecx

.nodebug:

    popad

           mov ebx, [.slot]

           shl ebx, 8

           push ebx

           mov ebx,[SLOT_BASE+ebx+APPDATA.pl0_stack]

           stdcall kernel_free, ebx

           pop ebx

           mov ebx,[SLOT_BASE+ebx+APPDATA.cur_dir]

           stdcall kernel_free, ebx

           mov edi, [.slot]

           shl edi,8

           add edi,SLOT_BASE

           mov eax, [edi+APPDATA.io_map]

           cmp eax, [SLOT_BASE+256+APPDATA.io_map]

           je @F

           call free_page

@@:

           mov eax, [edi+APPDATA.io_map+4]

           cmp eax, [SLOT_BASE+256+APPDATA.io_map+4]

           je @F

           call free_page

@@:

           mov eax, 0x20202020

           stosd

           stosd

           stosd

           mov ecx,244/4

           xor eax, eax

           rep stosd

  ; activate window

        movzx  eax, word [WIN_STACK + esi*2]

        cmp    eax, [TASK_COUNT]

        jne    .dont_activate

        pushad

 .check_next_window:

        dec    eax

        cmp    eax, 1

        jbe    .nothing_to_activate

        lea    esi, [WIN_POS+eax*2]

        movzx  edi, word [esi]               ; edi = process

        shl    edi, 5

        cmp    [CURRENT_TASK + edi + TASKDATA.state], byte 9  ; skip dead slots

        je     .check_next_window

        add    edi, window_data

; \begin{diamond}[19.09.2006]

; skip minimized windows

        test   [edi + WDATA.fl_wstate], WSTATE_MINIMIZED

        jnz    .check_next_window

; \end{diamond}

        call   waredraw

 .nothing_to_activate:

        popad

 .dont_activate:

        push    esi     ; remove hd1 & cd & flp reservation

        shl     esi, 5

        mov     esi, [esi+CURRENT_TASK+TASKDATA.pid]

        cmp     [hd1_status], esi

        jnz     @f

        call    free_hd_channel

        and     [hd1_status], 0

@@:

        cmp     [cd_status], esi

        jnz     @f

        call    free_cd_channel

        and     [cd_status], 0

@@:

        cmp     [flp_status], esi

        jnz     @f

        and     [flp_status], 0

@@:

        pop     esi

        cmp     [bgrlockpid], esi

        jnz     @f

        and     [bgrlockpid], 0

        and     [bgrlock], 0

@@:

    pusha ; remove all irq reservations

    mov   eax,esi

    shl   eax, 5

    mov   eax,[eax+CURRENT_TASK+TASKDATA.pid]

    mov   edi,irq_owner

    xor   ebx, ebx

    xor   edx, edx

  newirqfree:

    cmp   [edi + 4 * ebx], eax

    jne   nofreeirq

    mov   [edi + 4 * ebx], edx                          ; remove irq reservation

    mov   [irq_tab + 4 * ebx], edx                      ; remove irq handler

    mov   [irq_rights + 4 * ebx], edx                   ; set access rights to full access

  nofreeirq:

    inc   ebx

    cmp   ebx, 16

    jb    newirqfree

    popa

    pusha                     ; remove all port reservations

    mov   edx,esi

    shl   edx, 5

    add   edx,CURRENT_TASK

    mov   edx,[edx+TASKDATA.pid]

  rmpr0:

    mov   esi,[RESERVED_PORTS]

    test  esi,esi

    jz    rmpr9

  rmpr3:

    mov   edi,esi

    shl   edi,4

    add   edi,RESERVED_PORTS

    cmp   edx,[edi]

    je    rmpr4

    dec   esi

    jnz   rmpr3

    jmp   rmpr9

  rmpr4:

    mov   ecx,256

    sub   ecx,esi

    shl   ecx,4

    mov   esi,edi

    add   esi,16

    cld

    rep   movsb

    dec   dword [RESERVED_PORTS]

    jmp   rmpr0

  rmpr9:

    popa

    mov  edi,esi         ; do not run this process slot

    shl  edi, 5

    mov  [edi+CURRENT_TASK + TASKDATA.state],byte 9

; debugger test - terminate all debuggees

    mov  eax, 2

    mov  ecx, SLOT_BASE+2*0x100+APPDATA.debugger_slot

.xd0:

    cmp  eax, [TASK_COUNT]

    ja   .xd1

    cmp  dword [ecx], esi

    jnz  @f

    and  dword [ecx], 0

    pushad

    xchg eax, ecx

    mov  ebx, 2

    call sys_system

    popad

@@:

    inc  eax

    add  ecx, 0x100

    jmp  .xd0

.xd1:

;    call  systest

    sti  ; .. and life goes on

    mov   eax, [draw_limits.left]

    mov   ebx, [draw_limits.top]

    mov   ecx, [draw_limits.right]

    mov   edx, [draw_limits.bottom]

    call  calculatescreen

    xor   eax, eax

    xor   esi, esi

    call  redrawscreen

    mov   [MOUSE_BACKGROUND],byte 0  ; no mouse background

    mov   [DONT_DRAW_MOUSE],byte 0  ; draw mouse

    and   [application_table_status],0

    ;mov   esi,process_terminated

    ;call  sys_msg_board_str

    add esp, 4

    ret

restore .slot

iglobal

  boot_sched_1    db   'Building gdt tss pointer',0

  boot_sched_2    db   'Building IDT table',0

endg

build_scheduler:

        mov    esi,boot_sched_1

        call   boot_log

  ;      call   build_process_gdt_tss_pointer

  ;      mov    esi,boot_sched_2

  ;      call   boot_log

        ret