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Rev 1055 Rev 1056
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;; Copyright (C) KolibriOS team 2007-2008. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2007-2008. 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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; Virtual-8086 mode manager
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; Virtual-8086 mode manager
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; It is only possible to leave virtual-8086 mode by faulting to
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; It is only possible to leave virtual-8086 mode by faulting to
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; a protected-mode interrupt handler (typically the general-protection
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; a protected-mode interrupt handler (typically the general-protection
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; exception handler, which in turn calls the virtual 8086-mode monitor).
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v86_debug_exc:
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        pushad
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        xor     eax, eax
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        mov     dr6, eax
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        mov     bl, 1
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        jmp     v86_exc_c
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v86_page_fault:
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        add     esp, 4
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        pushad
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        mov     bl, 14
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        jmp     v86_exc_c
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v86_except_16:
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        pushad
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        mov     bl, 16
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        jmp     v86_exc_c
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v86_except_19:
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        pushad
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        mov     bl, 19
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; exception handler, which in turn calls the virtual 8086-mode monitor).
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iglobal
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iglobal
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v86_exc_str1    db      'V86 : unexpected exception ',0
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  v86_exc_str1  db      'V86 : unexpected exception ',0
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v86_exc_str2    db      ' at ',0
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  v86_exc_str2  db      ' at ',0
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v86_io_dword    db      ' (dword)',13,10,0
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  v86_io_dword  db      ' (dword)',13,10,0
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v86_irqerr      db      'V86 : IRQ already hooked',13,10,0
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  v86_irqerr    db      'V86 : IRQ already hooked',13,10,0
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endg
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endg
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v86_exc_c:
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        mov     ax, app_data
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        mov     ds, ax
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        mov     es, ax
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v86_exc_c:
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; Did we all that we have wanted to do?
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        cmp     bl,1
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        jne     @f
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        xor     eax, eax
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; Did we all that we have wanted to do?
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        mov     dr6, eax
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        mov     eax, [esp+v86_regs.size+10h+18h]
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  @@:   mov     eax, [esp+v86_regs.size+10h+18h]
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        cmp     word [esp+v86_regs.eip], ax
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        cmp     word [esp+v86_regs.eip], ax
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        jnz     @f
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        jnz     @f
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        shr     eax, 16
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        shr     eax, 16
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        cmp     word [esp+v86_regs.cs], ax
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        cmp     word [esp+v86_regs.cs], ax