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| 3 | ;; Copyright (C) KolibriOS team 2007-2015. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2007-2015. All rights reserved. ;; |
| 4 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
| 5 | ;; ;; |
5 | ;; ;; |
| 6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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| 7 | 7 | ||
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| 8 | $Revision: 6333 $ |
8 | $Revision: 8052 $ |
| 9 | 9 | ||
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| 10 | ; Virtual-8086 mode manager |
10 | ; Virtual-8086 mode manager |
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| 356 | ; If faulted EIP exceeds 0xFFFF, we have #GP and it is an error |
356 | ; If faulted EIP exceeds 0xFFFF, we have #GP and it is an error |
| 357 | cmp word [esp+v86_regs.eip+2], 0 |
357 | cmp word [esp+v86_regs.eip+2], 0 |
| 358 | jnz .nogp |
358 | jnz .nogp |
| 359 | ; Otherwise we can safely access byte at CS:IP |
359 | ; Otherwise we can safely access byte at CS:IP |
| 360 | ; (because it is #GP, not #PF handler) |
360 | ; (because it is #GP, not #PF handler) |
| 361 | ; Если бы мы могли схлопотать исключение только из-за чтения байтов кода, |
361 | ; If we could get an exception just because of reading code bytes, |
| 362 | ; мы бы его уже схлопотали и это было бы не #GP |
362 | ; we would have got it already and it wouldn't be #GP |
| 363 | movzx esi, word [esp+v86_regs.cs] |
363 | movzx esi, word [esp+v86_regs.cs] |
| 364 | shl esi, 4 |
364 | shl esi, 4 |
| 365 | add esi, [esp+v86_regs.eip] |
365 | add esi, [esp+v86_regs.eip] |
| 366 | lodsb |
366 | lodsb |
| 367 | cmp al, 0xCD ; int xx command = CD xx |
367 | cmp al, 0xCD ; int xx command = CD xx |