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Rev 1055 Rev 1056
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1055 $
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$Revision: 1056 $
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           and eax, 0xFFFFF000
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           and eax, 0xFFFFF000
543 
           ret
 543 
           ret
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- 
 
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 546 
align 4
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align 4
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547 
proc page_fault_handler
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548 
 
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549 
        test    byte [esp+12+2], 2
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550 
        jnz     v86_page_fault
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; Now it is called from sys32::exc_c (see stack frame there)
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        .err_code equ ebp+32
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proc page_fault_handler
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        .err_addr equ ebp-4
 549 
 
554 
 
 - 
 
555 
           pushad
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556 
           mov ebp, esp
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    .err_addr   equ ebp-4
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           mov eax, cr2
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558 
           push eax
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559 
 
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560 
           mov ax, app_data
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           mov ds, ax
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        mov     ebp, esp
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           mov es, ax
 553 
        mov     ebx, cr2
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        push    ebx               ; that is locals: .err_addr = cr2
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           inc [pg_data.pages_faults]
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        inc     [pg_data.pages_faults]
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566 
;     push eax
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;     push eax
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;     push edx
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;     push edx
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;     mov edx, 0x400   ;bochs
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569 
;     mov al,0xff      ;bochs
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;     mov edx, 0x400   ;bochs
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;     out dx, al       ;bochs
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;     mov al,0xff      ;bochs
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;     pop edx
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;     out dx, al       ;bochs
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;     pop eax
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;     pop edx
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 563 
;     pop eax
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           mov ebx, [.err_addr]
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575 
           mov eax, [.err_code]
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        mov     eax, [pf_err_code]
576 
 
 566 
 
577 
           cmp ebx, OS_BASE
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        cmp     ebx, OS_BASE      ;ebx == .err_addr
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           jb .user_space      ;ñòðàíèöà â ïàìÿòè ïðèëîæåíèÿ ;
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        jb      .user_space       ;ñòðàíèöà â ïàìÿòè ïðèëîæåíèÿ ;
579 
 
 569 
 
580 
           cmp ebx, page_tabs
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        cmp     ebx, page_tabs
581 
           jb .kernel_space    ;ñòðàíèöà â ïàìÿòè ÿäðà
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        jb      .kernel_space     ;ñòðàíèöà â ïàìÿòè ÿäðà
582 
 
 572 
 
583 
           cmp ebx, kernel_tabs
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        cmp     ebx, kernel_tabs
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           jb .alloc;.app_tabs ;òàáëèöû ñòðàíèö ïðèëîæåíèÿ ;
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        jb      .alloc;.app_tabs  ;òàáëèöû ñòðàíèö ïðèëîæåíèÿ ;
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                                  ;ïðîñòî ñîçäàäèì îäíó
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if 0 ;ïîêà ýòî ïðîñòî ëèøíåå
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        cmp     ebx, LFB_BASE
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        jb      .core_tabs        ;òàáëèöû ñòðàíèö ÿäðà
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                                  ;Îøèáêà
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  .lfb:
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                               ;ïðîñòî ñîçäàäèì îäíó
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586 
 
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                                  ;îáëàñòü LFB
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           cmp ebx, LFB_BASE
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                                  ;Îøèáêà
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           jb .core_tabs       ;òàáëèöû ñòðàíèö ÿäðà
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        jmp     .fail
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                               ;Îøèáêà
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end if
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.alloc:
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.alloc:
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           call alloc_page
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        call    alloc_page
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           test eax, eax
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        test    eax, eax
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           jz .fail
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        jz      .fail
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           stdcall map_page,[ebp-4],eax,dword PG_UW
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        stdcall map_page,[.err_addr],eax,dword PG_UW
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620 
           mov edi, [ebp-4]
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        mov     edi, [.err_addr]
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           and edi, 0xFFFFF000
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        and     edi, 0xFFFFF000
622 
           mov ecx, 1024
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        mov     ecx, 1024
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           xor eax, eax
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        xor     eax, eax
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           cld
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625 
           rep stosd
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       ;cld     ;caller is duty for this
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.exit:
 620 
        rep     stosd
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           mov esp, ebp
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.exit:  ;iret with repeat fault instruction
628 
           popad
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        add     esp,8 ; clear in stack: locals(.err_addr) + ret_to_caller
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           add esp, 4
 623 
        restore_ring3_context
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           iretd
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        iretd
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.err_access:
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.err_access  =  .fail
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;íèêîãäà íå ïðîèñõîäèò
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;íèêîãäà íå ïðîèñõîäèò
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           jmp .fail
 628 
       ;jmp     .fail
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 629 
 
636 
.kernel_space:
 630 
.kernel_space:
637 
           test eax, PG_MAP
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        test    eax, PG_MAP
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           jz .fail        ;ñòðàíèöà íå ïðèñóòñòâóåò
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        jz      .fail   ;ñòðàíèöà íå ïðèñóòñòâóåò
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 633 
 
640 
           test eax, 4     ;U/S
 634 
        test    eax,12  ;U/S (+below)
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           jnz .fail       ;ïðèëîæåíèå îáðàòèëîñü ê ïàìÿòè
 635 
        jnz     .fail   ;ïðèëîæåíèå îáðàòèëîñü ê ïàìÿòè
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                           ;ÿäðà
 636 
                        ;ÿäðà
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           call alloc_page
 652 
        call    alloc_page
659 
           test eax, eax
 653 
        test    eax, eax
660 
           jz .fail
 654 
        jz      .fail
Line 661... Line 655...
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 655 
 
662 
           push eax
 656 
        push    eax
663 
           stdcall map_page,[ebp-4],eax,dword PG_SW
 657 
        stdcall map_page,[.err_addr],eax,dword PG_SW
664 
           pop eax
 658 
        pop     eax
665 
           mov edi, [.err_addr]
 659 
        mov     edi, [.err_addr]
666 
           and edi, -4096
 660 
        and     edi, -4096
Line 672... Line 666...
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           or eax, PG_SW
 666 
        or      eax, PG_SW
673 
           mov [edx+APPDATA.io_map+ebx*4], eax
 667 
        mov     [edx+APPDATA.io_map+ebx*4], eax
Line 674... Line 668...
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 668 
 
675 
           add esi, [default_io_map]
 669 
        add     esi, [default_io_map]
676 
           mov ecx, 4096/4
 670 
        mov     ecx, 4096/4
677 
           cld
 671 
       ;cld     ;caller is duty for this
678 
           rep movsd
 672 
        rep     movsd
679 
           jmp .exit
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680 
 
 - 
 
681 
 
 - 
 
682 
;íå îáðàáàòûâàåì. Îøèáêà
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683 
 
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684 
.core_tabs:
 - 
 
685 
.fail:
 - 
 
686 
           mov esp, ebp
 - 
 
687 
           popad
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688 
           add esp, 4
 - 
 
689 
 
 - 
 
690 
;           iretd
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691 
 
 - 
 
692 
           save_ring3_context     ;debugger support
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693 
 
 - 
 
694 
           mov bl, 14
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695 
           jmp exc_c
 - 
 
696 
           iretd
 673 
        jmp     .exit
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endp
 674 
endp
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 675 
 
699 
align 4
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align 4
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1344 
           xor eax, eax
 1321 
           xor eax, eax
1345 
           pop ebx
 1322 
           pop ebx
1346 
.fail:
 1323 
.fail:
1347 
           ret
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           ret
1348 
endp
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endp
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