Rev 839 | Rev 841 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
||
4 | ;; Distributed under terms of the GNU General Public License ;; |
||
5 | ;; ;; |
||
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
164 | serge | 7 | |
593 | mikedld | 8 | $Revision: 840 $ |
9 | |||
10 | |||
164 | serge | 11 | align 4 |
12 | proc alloc_page |
||
13 | |||
14 | pushfd |
||
15 | cli |
||
660 | serge | 16 | push ebx |
164 | serge | 17 | mov ebx, [page_start] |
18 | mov ecx, [page_end] |
||
19 | .l1: |
||
20 | bsf eax,[ebx]; |
||
21 | jnz .found |
||
22 | add ebx,4 |
||
23 | cmp ebx, ecx |
||
24 | jb .l1 |
||
660 | serge | 25 | pop ebx |
164 | serge | 26 | popfd |
27 | xor eax,eax |
||
28 | ret |
||
29 | .found: |
||
30 | btr [ebx], eax |
||
31 | mov [page_start],ebx |
||
32 | sub ebx, sys_pgmap |
||
254 | serge | 33 | lea eax, [eax+ebx*8] |
164 | serge | 34 | shl eax, 12 |
35 | dec [pg_data.pages_free] |
||
660 | serge | 36 | pop ebx |
164 | serge | 37 | popfd |
38 | ret |
||
39 | endp |
||
40 | |||
41 | align 4 |
||
42 | proc alloc_pages stdcall, count:dword |
||
43 | pushfd |
||
660 | serge | 44 | push ebx |
45 | push edi |
||
164 | serge | 46 | cli |
47 | mov eax, [count] |
||
48 | add eax, 7 |
||
49 | shr eax, 3 |
||
50 | mov [count], eax |
||
51 | cmp eax, [pg_data.pages_free] |
||
52 | ja .fail |
||
53 | |||
54 | mov ecx, [page_start] |
||
55 | mov ebx, [page_end] |
||
56 | .find: |
||
57 | mov edx, [count] |
||
58 | mov edi, ecx |
||
59 | .match: |
||
60 | cmp byte [ecx], 0xFF |
||
61 | jne .next |
||
62 | dec edx |
||
63 | jz .ok |
||
64 | inc ecx |
||
65 | cmp ecx,ebx |
||
66 | jb .match |
||
660 | serge | 67 | .fail: |
68 | xor eax, eax |
||
69 | pop edi |
||
70 | pop ebx |
||
164 | serge | 71 | popfd |
72 | ret |
||
73 | .next: |
||
74 | inc ecx |
||
75 | cmp ecx, ebx |
||
76 | jb .find |
||
660 | serge | 77 | pop edi |
78 | pop ebx |
||
164 | serge | 79 | popfd |
80 | xor eax, eax |
||
81 | ret |
||
82 | .ok: |
||
83 | sub ecx, edi |
||
84 | inc ecx |
||
663 | serge | 85 | push esi |
164 | serge | 86 | mov esi, edi |
87 | xor eax, eax |
||
88 | rep stosb |
||
89 | sub esi, sys_pgmap |
||
90 | shl esi, 3+12 |
||
91 | mov eax, esi |
||
92 | mov ebx, [count] |
||
93 | shl ebx, 3 |
||
94 | sub [pg_data.pages_free], ebx |
||
663 | serge | 95 | pop esi |
660 | serge | 96 | pop edi |
97 | pop ebx |
||
164 | serge | 98 | popfd |
99 | ret |
||
100 | endp |
||
101 | |||
102 | align 4 |
||
103 | proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword |
||
321 | diamond | 104 | push ebx |
164 | serge | 105 | mov eax, [phis_addr] |
106 | and eax, not 0xFFF |
||
107 | or eax, [flags] |
||
108 | mov ebx, [lin_addr] |
||
109 | shr ebx, 12 |
||
365 | serge | 110 | mov [page_tabs+ebx*4], eax |
164 | serge | 111 | mov eax, [lin_addr] |
112 | invlpg [eax] |
||
321 | diamond | 113 | pop ebx |
164 | serge | 114 | ret |
115 | endp |
||
116 | |||
117 | align 4 |
||
281 | serge | 118 | map_space: ;not implemented |
119 | |||
120 | |||
121 | ret |
||
122 | |||
123 | |||
124 | align 4 |
||
164 | serge | 125 | proc free_page |
126 | ;arg: eax page address |
||
127 | pushfd |
||
128 | cli |
||
819 | serge | 129 | shr eax, 12 ;page index |
130 | bts dword [sys_pgmap], eax ;that's all! |
||
291 | serge | 131 | cmc |
328 | serge | 132 | adc [pg_data.pages_free], 0 |
164 | serge | 133 | shr eax, 3 |
819 | serge | 134 | and eax, not 3 ;dword offset from page_map |
448 | diamond | 135 | add eax, sys_pgmap |
164 | serge | 136 | cmp [page_start], eax |
137 | ja @f |
||
138 | popfd |
||
139 | ret |
||
140 | @@: |
||
141 | mov [page_start], eax |
||
142 | popfd |
||
143 | ret |
||
144 | endp |
||
145 | |||
741 | serge | 146 | proc map_io_mem stdcall, base:dword, size:dword, flags:dword |
147 | |||
148 | push ebx |
||
149 | push edi |
||
150 | mov eax, [size] |
||
151 | add eax, 4095 |
||
152 | and eax, -4096 |
||
153 | mov [size], eax |
||
154 | stdcall alloc_kernel_space, eax |
||
155 | test eax, eax |
||
156 | jz .fail |
||
157 | push eax |
||
158 | |||
159 | mov edi, 0x1000 |
||
160 | mov ebx, eax |
||
161 | mov ecx,[size] |
||
162 | mov edx, [base] |
||
163 | shr eax, 12 |
||
164 | shr ecx, 12 |
||
165 | and edx, -4096 |
||
166 | or edx, [flags] |
||
167 | @@: |
||
168 | mov [page_tabs+eax*4], edx |
||
819 | serge | 169 | ; push eax |
170 | ; invlpg [ebx] |
||
171 | ; pop eax |
||
741 | serge | 172 | inc eax |
173 | add ebx, edi |
||
174 | add edx, edi |
||
175 | loop @B |
||
176 | |||
177 | pop eax |
||
178 | mov edx, [base] |
||
179 | and edx, 4095 |
||
180 | add eax, edx |
||
181 | .fail: |
||
182 | pop edi |
||
183 | pop ebx |
||
184 | ret |
||
185 | endp |
||
186 | |||
279 | serge | 187 | ; param |
328 | serge | 188 | ; eax= page base + page flags |
819 | serge | 189 | ; ebx= linear address |
281 | serge | 190 | ; ecx= count |
191 | |||
192 | align 4 |
||
328 | serge | 193 | commit_pages: |
741 | serge | 194 | push edi |
328 | serge | 195 | test ecx, ecx |
196 | jz .fail |
||
281 | serge | 197 | |
328 | serge | 198 | mov edi, ebx |
199 | mov ebx, pg_data.pg_mutex |
||
200 | call wait_mutex ;ebx |
||
201 | |||
202 | mov edx, 0x1000 |
||
203 | mov ebx, edi |
||
204 | shr ebx, 12 |
||
205 | @@: |
||
365 | serge | 206 | mov [page_tabs+ebx*4], eax |
819 | serge | 207 | ; push eax |
208 | ; invlpg [edi] |
||
209 | ; pop eax |
||
328 | serge | 210 | add edi, edx |
211 | add eax, edx |
||
212 | inc ebx |
||
213 | dec ecx |
||
214 | jnz @B |
||
215 | mov [pg_data.pg_mutex],ecx |
||
216 | .fail: |
||
741 | serge | 217 | pop edi |
281 | serge | 218 | ret |
219 | |||
328 | serge | 220 | |
281 | serge | 221 | ; param |
279 | serge | 222 | ; eax= base |
281 | serge | 223 | ; ecx= count |
279 | serge | 224 | |
164 | serge | 225 | align 4 |
279 | serge | 226 | release_pages: |
321 | diamond | 227 | |
228 | pushad |
||
279 | serge | 229 | mov ebx, pg_data.pg_mutex |
230 | call wait_mutex ;ebx |
||
231 | |||
232 | mov esi, eax |
||
233 | mov edi, eax |
||
234 | |||
235 | shr esi, 10 |
||
365 | serge | 236 | add esi, page_tabs |
328 | serge | 237 | |
238 | mov ebp, [pg_data.pages_free] |
||
279 | serge | 239 | mov ebx, [page_start] |
240 | mov edx, sys_pgmap |
||
241 | @@: |
||
242 | xor eax, eax |
||
243 | xchg eax, [esi] |
||
837 | serge | 244 | push eax |
279 | serge | 245 | invlpg [edi] |
837 | serge | 246 | pop eax |
279 | serge | 247 | |
248 | test eax, 1 |
||
249 | jz .next |
||
250 | |||
251 | shr eax, 12 |
||
252 | bts [edx], eax |
||
291 | serge | 253 | cmc |
328 | serge | 254 | adc ebp, 0 |
279 | serge | 255 | shr eax, 3 |
256 | and eax, -4 |
||
257 | add eax, edx |
||
258 | cmp eax, ebx |
||
259 | jae .next |
||
260 | |||
261 | mov ebx, eax |
||
262 | .next: |
||
263 | add edi, 0x1000 |
||
264 | add esi, 4 |
||
265 | dec ecx |
||
266 | jnz @B |
||
328 | serge | 267 | mov [pg_data.pages_free], ebp |
279 | serge | 268 | and [pg_data.pg_mutex],0 |
321 | diamond | 269 | popad |
279 | serge | 270 | ret |
271 | |||
819 | serge | 272 | ; param |
273 | ; eax= base |
||
274 | ; ecx= count |
||
275 | |||
279 | serge | 276 | align 4 |
819 | serge | 277 | unmap_pages: |
278 | |||
279 | push edi |
||
280 | |||
281 | mov edi, eax |
||
282 | mov edx, eax |
||
283 | |||
284 | shr edi, 10 |
||
285 | add edi, page_tabs |
||
286 | |||
287 | xor eax, eax |
||
288 | @@: |
||
289 | stosd |
||
290 | invlpg [edx] |
||
291 | add edx, 0x1000 |
||
292 | loop @b |
||
293 | |||
294 | pop edi |
||
295 | ret |
||
296 | |||
297 | |||
298 | align 4 |
||
188 | serge | 299 | proc map_page_table stdcall, lin_addr:dword, phis_addr:dword |
321 | diamond | 300 | push ebx |
164 | serge | 301 | mov ebx, [lin_addr] |
302 | shr ebx, 22 |
||
303 | mov eax, [phis_addr] |
||
304 | and eax, not 0xFFF |
||
305 | or eax, PG_UW ;+PG_NOCACHE |
||
378 | serge | 306 | mov dword [master_tab+ebx*4], eax |
164 | serge | 307 | mov eax, [lin_addr] |
308 | shr eax, 10 |
||
365 | serge | 309 | add eax, page_tabs |
164 | serge | 310 | invlpg [eax] |
321 | diamond | 311 | pop ebx |
164 | serge | 312 | ret |
313 | endp |
||
314 | |||
315 | align 4 |
||
316 | proc init_LFB |
||
378 | serge | 317 | locals |
318 | pg_count dd ? |
||
319 | endl |
||
320 | |||
164 | serge | 321 | cmp dword [LFBAddress], -1 |
322 | jne @f |
||
412 | serge | 323 | mov [BOOT_VAR+0x901c],byte 2 |
839 | serge | 324 | stdcall alloc_pages, 0x280000 shr 12 |
325 | add eax, OS_BASE |
||
164 | serge | 326 | mov [LFBAddress], eax |
327 | ret |
||
328 | @@: |
||
329 | test [SCR_MODE],word 0100000000000000b |
||
211 | serge | 330 | jnz @f |
412 | serge | 331 | mov [BOOT_VAR+0x901c],byte 2 |
211 | serge | 332 | ret |
333 | @@: |
||
490 | serge | 334 | call init_mtrr |
335 | |||
839 | serge | 336 | mov eax, [LFBAddress] |
337 | or eax, PG_LARGE+PG_UW |
||
338 | mov [sys_pgdir+(LFB_BASE shr 20)], eax |
||
339 | add eax, 0x00400000 |
||
340 | mov [sys_pgdir+4+(LFB_BASE shr 20)], eax |
||
164 | serge | 341 | |
839 | serge | 342 | mov dword [exp_lfb+4], LFB_BASE |
164 | serge | 343 | |
207 | serge | 344 | bt [cpu_caps], CAPS_PGE |
345 | jnc @F |
||
465 | serge | 346 | or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL |
207 | serge | 347 | @@: |
378 | serge | 348 | mov dword [LFBAddress], LFB_BASE |
164 | serge | 349 | mov eax, cr3 ;flush TLB |
350 | mov cr3, eax |
||
351 | |||
352 | ret |
||
353 | endp |
||
354 | |||
355 | align 4 |
||
356 | proc new_mem_resize stdcall, new_size:dword |
||
357 | |||
276 | serge | 358 | mov ebx, pg_data.pg_mutex |
359 | call wait_mutex ;ebx |
||
164 | serge | 360 | |
361 | mov edi, [new_size] |
||
362 | add edi,4095 |
||
363 | and edi,not 4095 |
||
364 | mov [new_size], edi |
||
365 | |||
465 | serge | 366 | mov edx,[current_slot] |
367 | cmp [edx+APPDATA.heap_base],0 |
||
172 | serge | 368 | jne .exit |
369 | |||
465 | serge | 370 | mov esi, [edx+APPDATA.mem_size] |
164 | serge | 371 | add esi, 4095 |
372 | and esi, not 4095 |
||
373 | |||
374 | cmp edi, esi |
||
375 | jae .expand |
||
376 | |||
377 | shr edi, 12 |
||
378 | shr esi, 12 |
||
379 | @@: |
||
378 | serge | 380 | mov eax, [app_page_tabs+edi*4] |
164 | serge | 381 | test eax, 1 |
382 | jz .next |
||
378 | serge | 383 | mov dword [app_page_tabs+edi*4], 2 |
164 | serge | 384 | mov ebx, edi |
385 | shl ebx, 12 |
||
837 | serge | 386 | push eax |
659 | serge | 387 | invlpg [ebx] |
837 | serge | 388 | pop eax |
164 | serge | 389 | call free_page |
390 | |||
391 | .next: add edi, 1 |
||
392 | cmp edi, esi |
||
393 | jb @B |
||
394 | |||
395 | .update_size: |
||
465 | serge | 396 | mov ebx, [new_size] |
397 | call update_mem_size |
||
164 | serge | 398 | |
399 | xor eax, eax |
||
400 | dec [pg_data.pg_mutex] |
||
401 | ret |
||
402 | .expand: |
||
403 | |||
404 | push esi |
||
405 | push edi |
||
406 | |||
407 | add edi, 0x3FFFFF |
||
408 | and edi, not(0x3FFFFF) |
||
409 | add esi, 0x3FFFFF |
||
410 | and esi, not(0x3FFFFF) |
||
411 | |||
412 | cmp esi, edi |
||
413 | jae .grow |
||
414 | |||
415 | xchg esi, edi |
||
416 | |||
417 | @@: |
||
418 | call alloc_page |
||
419 | test eax, eax |
||
420 | jz .exit |
||
421 | |||
188 | serge | 422 | stdcall map_page_table, edi, eax |
164 | serge | 423 | |
424 | push edi |
||
425 | shr edi, 10 |
||
365 | serge | 426 | add edi, page_tabs |
164 | serge | 427 | mov ecx, 1024 |
428 | xor eax, eax |
||
429 | cld |
||
430 | rep stosd |
||
431 | pop edi |
||
432 | |||
433 | add edi, 0x00400000 |
||
434 | cmp edi, esi |
||
435 | jb @B |
||
436 | .grow: |
||
437 | pop edi |
||
438 | pop esi |
||
439 | @@: |
||
440 | call alloc_page |
||
441 | test eax, eax |
||
442 | jz .exit |
||
443 | stdcall map_page,esi,eax,dword PG_UW |
||
444 | |||
445 | push edi |
||
446 | mov edi, esi |
||
447 | xor eax, eax |
||
448 | mov ecx, 1024 |
||
449 | cld |
||
450 | rep stosd |
||
451 | pop edi |
||
452 | |||
453 | add esi, 0x1000 |
||
454 | cmp esi, edi |
||
294 | diamond | 455 | jb @B |
164 | serge | 456 | |
457 | jmp .update_size |
||
458 | .exit: |
||
459 | xor eax, eax |
||
460 | inc eax |
||
461 | dec [pg_data.pg_mutex] |
||
462 | ret |
||
463 | endp |
||
464 | |||
294 | diamond | 465 | update_mem_size: |
465 | serge | 466 | ; in: edx = slot base |
294 | diamond | 467 | ; ebx = new memory size |
468 | ; destroys eax,ecx,edx |
||
469 | |||
465 | serge | 470 | mov [APPDATA.mem_size+edx],ebx |
294 | diamond | 471 | ;search threads and update |
472 | ;application memory size infomation |
||
465 | serge | 473 | mov ecx,[APPDATA.dir_table+edx] |
294 | diamond | 474 | mov eax,2 |
475 | |||
476 | .search_threads: |
||
477 | ;eax = current slot |
||
478 | ;ebx = new memory size |
||
479 | ;ecx = page directory |
||
480 | cmp eax,[TASK_COUNT] |
||
481 | jg .search_threads_end |
||
482 | mov edx,eax |
||
483 | shl edx,5 |
||
484 | cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty? |
||
485 | jz .search_threads_next |
||
486 | shl edx,3 |
||
380 | serge | 487 | cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread? |
294 | diamond | 488 | jnz .search_threads_next |
380 | serge | 489 | mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size |
294 | diamond | 490 | .search_threads_next: |
491 | inc eax |
||
492 | jmp .search_threads |
||
493 | .search_threads_end: |
||
494 | ret |
||
495 | |||
285 | serge | 496 | ; param |
497 | ; eax= linear address |
||
498 | ; |
||
499 | ; retval |
||
500 | ; eax= phisical page address |
||
501 | |||
164 | serge | 502 | align 4 |
285 | serge | 503 | get_pg_addr: |
504 | shr eax, 12 |
||
365 | serge | 505 | mov eax, [page_tabs+eax*4] |
164 | serge | 506 | and eax, 0xFFFFF000 |
507 | ret |
||
508 | |||
465 | serge | 509 | |
188 | serge | 510 | align 4 |
164 | serge | 511 | proc page_fault_handler |
465 | serge | 512 | |
709 | diamond | 513 | test byte [esp+12+2], 2 |
514 | jnz v86_page_fault |
||
515 | |||
465 | serge | 516 | .err_code equ ebp+32 |
517 | .err_addr equ ebp-4 |
||
518 | |||
164 | serge | 519 | pushad |
520 | mov ebp, esp |
||
521 | mov eax, cr2 |
||
172 | serge | 522 | push eax |
164 | serge | 523 | |
465 | serge | 524 | mov ax, app_data |
164 | serge | 525 | mov ds, ax |
188 | serge | 526 | mov es, ax |
164 | serge | 527 | |
188 | serge | 528 | inc [pg_data.pages_faults] |
529 | |||
465 | serge | 530 | mov ebx, [.err_addr] |
531 | mov eax, [.err_code] |
||
164 | serge | 532 | |
839 | serge | 533 | ; xchg bx, bx |
534 | |||
535 | cmp ebx, HEAP_BASE |
||
465 | serge | 536 | jb .user_space ;ñòðàíèöà â ïàìÿòè ïðèëîæåíèÿ ; |
188 | serge | 537 | |
839 | serge | 538 | cmp ebx, LFB_BASE |
539 | jb .kernel_heap |
||
540 | |||
378 | serge | 541 | cmp ebx, page_tabs |
839 | serge | 542 | jb .lfb |
164 | serge | 543 | |
839 | serge | 544 | cmp ebx, OS_BASE |
545 | jb .core_tabs |
||
546 | |||
547 | jmp .core_tabs |
||
548 | |||
549 | ; cmp ebx, kernel_tabs |
||
550 | ; jb .alloc;.app_tabs ;òàáëèöû ñòðàíèö ïðèëîæåíèÿ ; |
||
465 | serge | 551 | ;ïðîñòî ñîçäàäèì îäíó |
378 | serge | 552 | |
465 | serge | 553 | .lfb: |
839 | serge | 554 | shr ebx, 22 |
555 | mov edx, [sys_pgdir + ebx*4] |
||
556 | mov [master_tab + ebx*4], edx |
||
557 | jmp .exit |
||
164 | serge | 558 | |
839 | serge | 559 | .core_tabs: |
560 | |||
561 | shr ebx, 12 |
||
562 | and ebx, 0x3FF |
||
563 | mov edx, [master_tab + ebx*4] |
||
564 | test edx, PG_MAP |
||
565 | jz .check_ptab ;òàáëèöà ñòðàíèö íå ñîçäàíà |
||
566 | |||
465 | serge | 567 | align 4 |
839 | serge | 568 | .kernel_heap: |
569 | |||
570 | shr ebx, 22 |
||
571 | mov edx, [master_tab + ebx*4] |
||
572 | test edx, PG_MAP |
||
573 | jz .check_ptab ;òàáëèöà ñòðàíèö íå ñîçäàíà |
||
574 | |||
575 | .check_ptab: |
||
576 | mov edx, [sys_pgdir + ebx*4] |
||
577 | test edx, PG_MAP |
||
578 | jnz @F |
||
579 | |||
580 | call alloc_page |
||
581 | test eax, eax |
||
582 | jz .fail |
||
583 | |||
584 | lea edx, [eax + PG_UW] |
||
585 | lea edi, [eax + OS_BASE] |
||
586 | mov ecx, 1024 |
||
587 | xor eax, eax |
||
588 | cld |
||
589 | rep stosd |
||
590 | |||
591 | mov [sys_pgdir + ebx*4], edx |
||
592 | @@: |
||
593 | mov [master_tab + ebx*4], edx |
||
594 | jmp .exit |
||
595 | |||
596 | align 4 |
||
164 | serge | 597 | .user_space: |
465 | serge | 598 | test eax, PG_MAP |
599 | jnz .err_access ;Ñòðàíèöà ïðèñóòñòâóåò |
||
600 | ;Îøèáêà äîñòóïà ? |
||
601 | |||
164 | serge | 602 | shr ebx, 12 |
172 | serge | 603 | mov ecx, ebx |
604 | shr ecx, 10 |
||
839 | serge | 605 | mov edx, [master_tab + ecx*4] |
465 | serge | 606 | test edx, PG_MAP |
607 | jz .fail ;òàáëèöà ñòðàíèö íå ñîçäàíà |
||
608 | ;íåâåðíûé àäðåñ â ïðîãðàììå |
||
172 | serge | 609 | |
365 | serge | 610 | mov eax, [page_tabs+ebx*4] |
164 | serge | 611 | test eax, 2 |
465 | serge | 612 | jz .fail ;àäðåñ íå çàðåçåðâèðîâàí äëÿ ; |
613 | ;èñïîëüçîâàíèÿ. Îøèáêà |
||
188 | serge | 614 | .alloc: |
164 | serge | 615 | call alloc_page |
566 | serge | 616 | test eax, eax |
465 | serge | 617 | jz .fail |
164 | serge | 618 | |
619 | stdcall map_page,[ebp-4],eax,dword PG_UW |
||
620 | |||
188 | serge | 621 | mov edi, [ebp-4] |
622 | and edi, 0xFFFFF000 |
||
164 | serge | 623 | mov ecx, 1024 |
624 | xor eax, eax |
||
188 | serge | 625 | cld |
626 | rep stosd |
||
164 | serge | 627 | .exit: |
628 | mov esp, ebp |
||
629 | popad |
||
630 | add esp, 4 |
||
631 | iretd |
||
465 | serge | 632 | |
633 | .err_access: |
||
634 | ;íèêîãäà íå ïðîèñõîäèò |
||
635 | jmp .fail |
||
636 | |||
637 | .kernel_space: |
||
638 | test eax, PG_MAP |
||
639 | jz .fail ;ñòðàíèöà íå ïðèñóòñòâóåò |
||
640 | |||
641 | test eax, 4 ;U/S |
||
642 | jnz .fail ;ïðèëîæåíèå îáðàòèëîñü ê ïàìÿòè |
||
643 | ;ÿäðà |
||
644 | test eax, 8 |
||
645 | jnz .fail ;óñòàíîâëåí çàðåçåðâèðîâàííûé áèò |
||
646 | ;â òàáëèöàõ ñòðàíèö. äîáàâëåíî â P4/Xeon |
||
647 | |||
648 | ;ïîïûòêà çàïèñè â çàùèù¸ííóþ ñòðàíèöó ÿäðà |
||
649 | |||
650 | cmp ebx, tss._io_map_0 |
||
651 | jb .fail |
||
652 | |||
653 | cmp ebx, tss._io_map_0+8192 |
||
654 | jae .fail |
||
655 | |||
656 | ; io permission map |
||
657 | ; copy-on-write protection |
||
658 | |||
659 | call alloc_page |
||
566 | serge | 660 | test eax, eax |
465 | serge | 661 | jz .fail |
662 | |||
663 | push eax |
||
664 | stdcall map_page,[ebp-4],eax,dword PG_SW |
||
665 | pop eax |
||
666 | mov edi, [.err_addr] |
||
667 | and edi, -4096 |
||
668 | lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0 |
||
669 | |||
670 | mov ebx, esi |
||
671 | shr ebx, 12 |
||
672 | mov edx, [current_slot] |
||
673 | or eax, PG_SW |
||
674 | mov [edx+APPDATA.io_map+ebx*4], eax |
||
675 | |||
676 | add esi, [default_io_map] |
||
677 | mov ecx, 4096/4 |
||
678 | cld |
||
679 | rep movsd |
||
680 | jmp .exit |
||
681 | |||
682 | |||
683 | ;íå îáðàáàòûâàåì. Îøèáêà |
||
684 | |||
172 | serge | 685 | .fail: |
686 | mov esp, ebp |
||
687 | popad |
||
688 | add esp, 4 |
||
164 | serge | 689 | |
465 | serge | 690 | ; iretd |
691 | |||
172 | serge | 692 | save_ring3_context ;debugger support |
693 | |||
694 | mov bl, 14 |
||
695 | jmp exc_c |
||
696 | iretd |
||
164 | serge | 697 | endp |
698 | |||
699 | align 4 |
||
700 | proc map_mem stdcall, lin_addr:dword,pdir:dword,\ |
||
701 | ofs:dword,buf_size:dword |
||
702 | mov eax, [buf_size] |
||
703 | test eax, eax |
||
704 | jz .exit |
||
705 | |||
706 | mov eax, [pdir] |
||
707 | and eax, 0xFFFFF000 |
||
708 | |||
536 | diamond | 709 | stdcall map_page,[ipc_pdir],eax,PG_UW |
164 | serge | 710 | mov ebx, [ofs] |
711 | shr ebx, 22 |
||
712 | mov esi, [ipc_pdir] |
||
713 | mov edi, [ipc_ptab] |
||
714 | mov eax, [esi+ebx*4] |
||
715 | and eax, 0xFFFFF000 |
||
716 | jz .exit |
||
536 | diamond | 717 | stdcall map_page,edi,eax,PG_UW |
164 | serge | 718 | ; inc ebx |
719 | ; add edi, 0x1000 |
||
720 | ; mov eax, [esi+ebx*4] |
||
721 | ; test eax, eax |
||
722 | ; jz @f |
||
723 | ; and eax, 0xFFFFF000 |
||
724 | ; stdcall map_page, edi, eax |
||
725 | |||
726 | @@: mov edi, [lin_addr] |
||
727 | and edi, 0xFFFFF000 |
||
728 | mov ecx, [buf_size] |
||
729 | add ecx, 4095 |
||
730 | shr ecx, 12 |
||
731 | inc ecx |
||
732 | |||
733 | mov edx, [ofs] |
||
734 | shr edx, 12 |
||
735 | and edx, 0x3FF |
||
736 | mov esi, [ipc_ptab] |
||
737 | |||
738 | .map: mov eax, [esi+edx*4] |
||
739 | and eax, 0xFFFFF000 |
||
536 | diamond | 740 | jz .exit |
741 | stdcall map_page,edi,eax,PG_UW |
||
742 | dec ecx |
||
743 | jz .exit |
||
164 | serge | 744 | add edi, 0x1000 |
745 | inc edx |
||
536 | diamond | 746 | cmp edx, 0x400 |
164 | serge | 747 | jnz .map |
536 | diamond | 748 | inc ebx |
749 | mov eax, [ipc_pdir] |
||
750 | mov eax, [eax+ebx*4] |
||
751 | and eax, 0xFFFFF000 |
||
752 | jz .exit |
||
753 | stdcall map_page,esi,eax,PG_UW |
||
754 | xor edx, edx |
||
755 | jmp .map |
||
164 | serge | 756 | |
757 | .exit: |
||
758 | ret |
||
759 | endp |
||
760 | |||
761 | align 4 |
||
762 | proc map_memEx stdcall, lin_addr:dword,pdir:dword,\ |
||
763 | ofs:dword,buf_size:dword |
||
764 | mov eax, [buf_size] |
||
765 | test eax, eax |
||
766 | jz .exit |
||
767 | |||
768 | mov eax, [pdir] |
||
769 | and eax, 0xFFFFF000 |
||
770 | |||
771 | stdcall map_page,[proc_mem_pdir],eax,dword PG_UW |
||
772 | mov ebx, [ofs] |
||
773 | shr ebx, 22 |
||
774 | mov esi, [proc_mem_pdir] |
||
775 | mov edi, [proc_mem_tab] |
||
776 | mov eax, [esi+ebx*4] |
||
777 | and eax, 0xFFFFF000 |
||
778 | test eax, eax |
||
779 | jz .exit |
||
780 | stdcall map_page,edi,eax,dword PG_UW |
||
781 | |||
782 | @@: mov edi, [lin_addr] |
||
783 | and edi, 0xFFFFF000 |
||
784 | mov ecx, [buf_size] |
||
785 | add ecx, 4095 |
||
786 | shr ecx, 12 |
||
787 | inc ecx |
||
788 | |||
789 | mov edx, [ofs] |
||
790 | shr edx, 12 |
||
791 | and edx, 0x3FF |
||
792 | mov esi, [proc_mem_tab] |
||
793 | |||
794 | .map: mov eax, [esi+edx*4] |
||
795 | ; and eax, 0xFFFFF000 |
||
796 | ; test eax, eax |
||
797 | ; jz .exit |
||
798 | stdcall map_page,edi,eax,dword PG_UW |
||
799 | add edi, 0x1000 |
||
800 | inc edx |
||
801 | dec ecx |
||
802 | jnz .map |
||
803 | .exit: |
||
804 | ret |
||
805 | endp |
||
806 | |||
807 | |||
808 | |||
809 | |||
810 | sys_IPC: |
||
811 | ;input: |
||
812 | ; eax=1 - set ipc buffer area |
||
813 | ; ebx=address of buffer |
||
814 | ; ecx=size of buffer |
||
815 | ; eax=2 - send message |
||
816 | ; ebx=PID |
||
817 | ; ecx=address of message |
||
818 | ; edx=size of message |
||
819 | |||
820 | cmp eax,1 |
||
821 | jne @f |
||
822 | call set_ipc_buff |
||
823 | mov [esp+36], eax |
||
824 | ret |
||
825 | @@: |
||
826 | cmp eax, 2 |
||
827 | jne @f |
||
828 | stdcall sys_ipc_send, ebx, ecx, edx |
||
829 | mov [esp+36], eax |
||
830 | ret |
||
831 | @@: |
||
832 | xor eax, eax |
||
833 | not eax |
||
834 | mov [esp+36], eax |
||
835 | ret |
||
836 | |||
837 | align 4 |
||
838 | proc set_ipc_buff |
||
839 | |||
465 | serge | 840 | mov eax,[current_slot] |
164 | serge | 841 | pushf |
842 | cli |
||
465 | serge | 843 | mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area |
844 | mov [eax+APPDATA.ipc_size],ecx |
||
164 | serge | 845 | |
846 | add ecx, ebx |
||
847 | add ecx, 4095 |
||
848 | and ecx, not 4095 |
||
849 | |||
850 | .touch: mov eax, [ebx] |
||
851 | add ebx, 0x1000 |
||
852 | cmp ebx, ecx |
||
536 | diamond | 853 | jb .touch |
164 | serge | 854 | |
855 | popf |
||
856 | xor eax, eax |
||
857 | ret |
||
858 | endp |
||
859 | |||
860 | proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword |
||
861 | locals |
||
862 | dst_slot dd ? |
||
863 | dst_offset dd ? |
||
864 | buf_size dd ? |
||
536 | diamond | 865 | used_buf dd ? |
164 | serge | 866 | endl |
867 | |||
868 | pushf |
||
869 | cli |
||
870 | |||
871 | mov eax, [PID] |
||
872 | call pid_to_slot |
||
873 | test eax,eax |
||
874 | jz .no_pid |
||
875 | |||
876 | mov [dst_slot], eax |
||
877 | shl eax,8 |
||
380 | serge | 878 | mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined? |
164 | serge | 879 | test edi,edi |
880 | jz .no_ipc_area |
||
881 | |||
882 | mov ebx, edi |
||
883 | and ebx, 0xFFF |
||
884 | mov [dst_offset], ebx |
||
885 | |||
380 | serge | 886 | mov esi, [eax+SLOT_BASE+0xa4] |
164 | serge | 887 | mov [buf_size], esi |
888 | |||
536 | diamond | 889 | mov ecx, [ipc_tmp] |
890 | cmp esi, 0x40000-0x1000 ; size of [ipc_tmp] minus one page |
||
891 | jbe @f |
||
892 | push eax esi edi |
||
893 | add esi,0x1000 |
||
894 | stdcall alloc_kernel_space,esi |
||
895 | mov ecx, eax |
||
896 | pop edi esi eax |
||
897 | @@: |
||
898 | mov [used_buf], ecx |
||
899 | stdcall map_mem, ecx, [SLOT_BASE+eax+0xB8],\ |
||
164 | serge | 900 | edi, esi |
901 | |||
902 | mov edi, [dst_offset] |
||
536 | diamond | 903 | add edi, [used_buf] |
164 | serge | 904 | cmp dword [edi], 0 |
905 | jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now |
||
227 | serge | 906 | |
566 | serge | 907 | mov edx, dword [edi+4] |
908 | lea ebx, [edx+8] |
||
164 | serge | 909 | add ebx, [msg_size] |
910 | cmp ebx, [buf_size] |
||
911 | ja .buffer_overflow ;esi<0 - not enough memory in buffer |
||
227 | serge | 912 | |
164 | serge | 913 | mov dword [edi+4], ebx |
914 | mov eax,[TASK_BASE] |
||
915 | mov eax, [eax+0x04] ;eax - our PID |
||
916 | add edi, edx |
||
917 | mov [edi], eax |
||
918 | mov ecx, [msg_size] |
||
919 | |||
920 | mov [edi+4], ecx |
||
921 | add edi, 8 |
||
922 | mov esi, [msg_addr] |
||
465 | serge | 923 | ; add esi, new_app_base |
164 | serge | 924 | cld |
925 | rep movsb |
||
926 | |||
927 | mov ebx, [ipc_tmp] |
||
928 | mov edx, ebx |
||
929 | shr ebx, 12 |
||
930 | xor eax, eax |
||
365 | serge | 931 | mov [page_tabs+ebx*4], eax |
164 | serge | 932 | invlpg [edx] |
933 | |||
934 | mov ebx, [ipc_pdir] |
||
935 | mov edx, ebx |
||
936 | shr ebx, 12 |
||
937 | xor eax, eax |
||
365 | serge | 938 | mov [page_tabs+ebx*4], eax |
164 | serge | 939 | invlpg [edx] |
940 | |||
941 | mov ebx, [ipc_ptab] |
||
942 | mov edx, ebx |
||
943 | shr ebx, 12 |
||
944 | xor eax, eax |
||
365 | serge | 945 | mov [page_tabs+ebx*4], eax |
164 | serge | 946 | invlpg [edx] |
947 | |||
948 | mov eax, [dst_slot] |
||
949 | shl eax, 8 |
||
380 | serge | 950 | or [eax+SLOT_BASE+0xA8],dword 0x40 |
164 | serge | 951 | cmp dword [check_idle_semaphore],20 |
952 | jge .ipc_no_cis |
||
953 | |||
954 | mov dword [check_idle_semaphore],5 |
||
955 | .ipc_no_cis: |
||
536 | diamond | 956 | push 0 |
957 | jmp .ret |
||
164 | serge | 958 | .no_pid: |
959 | popf |
||
536 | diamond | 960 | mov eax, 4 |
164 | serge | 961 | ret |
962 | .no_ipc_area: |
||
963 | popf |
||
964 | xor eax, eax |
||
965 | inc eax |
||
966 | ret |
||
967 | .ipc_blocked: |
||
536 | diamond | 968 | push 2 |
969 | jmp .ret |
||
164 | serge | 970 | .buffer_overflow: |
536 | diamond | 971 | push 3 |
972 | .ret: |
||
973 | mov eax, [used_buf] |
||
974 | cmp eax, [ipc_tmp] |
||
975 | jz @f |
||
976 | stdcall free_kernel_space,eax |
||
977 | @@: |
||
978 | pop eax |
||
164 | serge | 979 | popf |
980 | ret |
||
981 | endp |
||
982 | |||
983 | align 4 |
||
170 | serge | 984 | sysfn_meminfo: |
164 | serge | 985 | |
465 | serge | 986 | ; add ebx, new_app_base |
987 | cmp ebx, OS_BASE |
||
988 | jae .fail |
||
172 | serge | 989 | |
164 | serge | 990 | mov eax, [pg_data.pages_count] |
170 | serge | 991 | mov [ebx], eax |
172 | serge | 992 | shl eax, 12 |
993 | mov [esp+36], eax |
||
170 | serge | 994 | mov ecx, [pg_data.pages_free] |
995 | mov [ebx+4], ecx |
||
996 | mov edx, [pg_data.pages_faults] |
||
997 | mov [ebx+8], edx |
||
998 | mov esi, [heap_size] |
||
999 | mov [ebx+12], esi |
||
1000 | mov edi, [heap_free] |
||
1001 | mov [ebx+16], edi |
||
1002 | mov eax, [heap_blocks] |
||
1003 | mov [ebx+20], eax |
||
1004 | mov ecx, [free_blocks] |
||
1005 | mov [ebx+24], ecx |
||
164 | serge | 1006 | ret |
172 | serge | 1007 | .fail: |
1008 | mov dword [esp+36], -1 |
||
1009 | ret |
||
164 | serge | 1010 | |
1011 | align 4 |
||
1012 | new_services: |
||
1013 | |||
1014 | cmp eax,4 |
||
1015 | jle sys_sheduler |
||
1016 | |||
170 | serge | 1017 | cmp eax, 11 |
164 | serge | 1018 | jb .fail |
1019 | ja @f |
||
1020 | |||
188 | serge | 1021 | call init_heap |
164 | serge | 1022 | mov [esp+36], eax |
1023 | ret |
||
1024 | @@: |
||
1025 | cmp eax, 12 |
||
1026 | ja @f |
||
1027 | |||
1028 | stdcall user_alloc, ebx |
||
1029 | mov [esp+36], eax |
||
1030 | ret |
||
1031 | @@: |
||
1032 | cmp eax, 13 |
||
1033 | ja @f |
||
1034 | stdcall user_free, ebx |
||
1035 | mov [esp+36], eax |
||
1036 | ret |
||
1037 | @@: |
||
1038 | cmp eax, 14 |
||
1039 | ja @f |
||
465 | serge | 1040 | cmp ebx, OS_BASE |
1041 | jae .fail |
||
227 | serge | 1042 | stdcall get_event_ex, ebx, ecx |
1043 | mov [esp+36], eax |
||
164 | serge | 1044 | ret |
1045 | @@: |
||
1046 | cmp eax, 15 |
||
1047 | ja @f |
||
465 | serge | 1048 | mov ecx, [current_slot] |
1049 | mov eax, [ecx+APPDATA.fpu_handler] |
||
1050 | mov [ecx+APPDATA.fpu_handler], ebx |
||
164 | serge | 1051 | mov [esp+36], eax |
1052 | ret |
||
1053 | @@: |
||
1054 | cmp eax, 16 |
||
1055 | ja @f |
||
1056 | |||
188 | serge | 1057 | test ebx, ebx |
1058 | jz .fail |
||
465 | serge | 1059 | cmp ebx, OS_BASE |
1060 | jae .fail |
||
164 | serge | 1061 | stdcall get_service, ebx |
1062 | mov [esp+36], eax |
||
1063 | ret |
||
1064 | @@: |
||
1065 | cmp eax, 17 |
||
1066 | ja @f |
||
378 | serge | 1067 | call srv_handlerEx ;ebx |
164 | serge | 1068 | mov [esp+36], eax |
1069 | ret |
||
168 | serge | 1070 | @@: |
1071 | cmp eax, 18 |
||
1072 | ja @f |
||
465 | serge | 1073 | mov ecx, [current_slot] |
1074 | mov eax, [ecx+APPDATA.sse_handler] |
||
1075 | mov [ecx+APPDATA.sse_handler], ebx |
||
168 | serge | 1076 | mov [esp+36], eax |
1077 | ret |
||
164 | serge | 1078 | @@: |
198 | serge | 1079 | cmp eax, 19 |
448 | diamond | 1080 | ja @f |
465 | serge | 1081 | cmp ebx, OS_BASE |
1082 | jae .fail |
||
198 | serge | 1083 | stdcall load_library, ebx |
1084 | mov [esp+36], eax |
||
1085 | ret |
||
448 | diamond | 1086 | @@: |
490 | serge | 1087 | cmp eax, 20 |
740 | serge | 1088 | ja @F |
490 | serge | 1089 | mov eax, ecx |
1090 | call user_realloc |
||
1091 | mov [esp+36], eax |
||
1092 | ret |
||
740 | serge | 1093 | @@: |
747 | serge | 1094 | cmp eax, 21 ;for test purposes only |
1095 | ja @f ;will be removed soon |
||
740 | serge | 1096 | cmp ebx, OS_BASE |
1097 | jae .fail |
||
1098 | |||
1099 | stdcall load_PE, ebx |
||
1100 | |||
1101 | test eax, eax |
||
1102 | jz @F |
||
1103 | |||
1104 | mov esi, eax |
||
1105 | stdcall eax, DRV_ENTRY |
||
1106 | |||
1107 | test eax, eax |
||
1108 | jz @F |
||
1109 | |||
1110 | mov [eax+SRV.entry], esi |
||
1111 | |||
1112 | @@: |
||
1113 | mov [esp+36], eax |
||
1114 | ret |
||
1115 | |||
1116 | |||
164 | serge | 1117 | .fail: |
1118 | xor eax, eax |
||
1119 | mov [esp+36], eax |
||
1120 | ret |
||
1121 | |||
1122 | align 4 |
||
819 | serge | 1123 | proc load_pe_driver stdcall, file:dword |
1124 | |||
1125 | stdcall load_PE, [file] |
||
1126 | test eax, eax |
||
1127 | jz .fail |
||
1128 | |||
1129 | mov esi, eax |
||
1130 | stdcall eax, DRV_ENTRY |
||
1131 | test eax, eax |
||
1132 | jz .fail |
||
1133 | |||
1134 | mov [eax+SRV.entry], esi |
||
1135 | ret |
||
1136 | |||
1137 | .fail: |
||
1138 | xor eax, eax |
||
1139 | ret |
||
1140 | endp |
||
1141 | |||
1142 | |||
1143 | align 4 |
||
164 | serge | 1144 | proc init_mtrr |
1145 | |||
412 | serge | 1146 | cmp [BOOT_VAR+0x901c],byte 2 |
164 | serge | 1147 | je .exit |
1148 | |||
211 | serge | 1149 | bt [cpu_caps], CAPS_MTRR |
1150 | jnc .exit |
||
1151 | |||
164 | serge | 1152 | mov eax, cr0 |
1153 | or eax, 0x60000000 ;disable caching |
||
1154 | mov cr0, eax |
||
1155 | wbinvd ;invalidate cache |
||
1156 | |||
1157 | mov ecx, 0x2FF |
||
1158 | rdmsr ; |
||
1159 | push eax |
||
1160 | |||
1161 | xor edx, edx |
||
1162 | xor eax, eax |
||
1163 | mov ecx, 0x2FF |
||
1164 | wrmsr ;disable all MTRR |
||
1165 | |||
821 | diamond | 1166 | mov eax, [MEM_AMOUNT] |
1167 | ; round eax up to next power of 2 |
||
1168 | dec eax |
||
1169 | bsr ecx, eax |
||
1170 | mov eax, 2 |
||
1171 | shl eax, cl |
||
1172 | stdcall set_mtrr, edx,edx,eax,MEM_WB |
||
1173 | stdcall set_mtrr, 1,[LFBAddress],[LFBSize],MEM_WC |
||
164 | serge | 1174 | xor edx, edx |
1175 | xor eax, eax |
||
1176 | mov ecx, 0x204 |
||
1177 | mov ebx, 6 |
||
1178 | @@: |
||
1179 | wrmsr ;disable unused MTRR |
||
1180 | inc ecx |
||
1181 | wrmsr |
||
1182 | inc ecx |
||
1183 | dec ebx |
||
1184 | jnz @b |
||
1185 | |||
1186 | wbinvd ;again invalidate |
||
1187 | |||
1188 | pop eax |
||
1189 | or eax, 0x800 ;set default memtype to UC |
||
1190 | and al, 0xF0 |
||
1191 | mov ecx, 0x2FF |
||
1192 | wrmsr ;and enable MTRR |
||
1193 | |||
1194 | mov eax, cr0 |
||
1195 | and eax, not 0x60000000 |
||
1196 | mov cr0, eax ; enable caching |
||
1197 | .exit: |
||
1198 | ret |
||
1199 | endp |
||
1200 | |||
1201 | align 4 |
||
1202 | proc set_mtrr stdcall, reg:dword,base:dword,size:dword,mem_type:dword |
||
1203 | |||
1204 | xor edx, edx |
||
1205 | mov eax, [base] |
||
1206 | or eax, [mem_type] |
||
1207 | mov ecx, [reg] |
||
1208 | lea ecx, [0x200+ecx*2] |
||
1209 | wrmsr |
||
1210 | |||
1211 | mov ebx, [size] |
||
1212 | dec ebx |
||
1213 | mov eax, 0xFFFFFFFF |
||
1214 | mov edx, 0x0000000F |
||
1215 | sub eax, ebx |
||
1216 | sbb edx, 0 |
||
1217 | or eax, 0x800 |
||
1218 | inc ecx |
||
1219 | wrmsr |
||
1220 | ret |
||
1221 | endp |
||
1222 | |||
465 | serge | 1223 | align 4 |
172 | serge | 1224 | proc stall stdcall, delay:dword |
1225 | push ecx |
||
1226 | push edx |
||
1227 | push ebx |
||
1228 | push eax |
||
1229 | |||
1230 | mov eax, [delay] |
||
1231 | mul [stall_mcs] |
||
1232 | mov ebx, eax ;low |
||
1233 | mov ecx, edx ;high |
||
1234 | rdtsc |
||
1235 | add ebx, eax |
||
1236 | adc ecx,edx |
||
1237 | @@: |
||
1238 | rdtsc |
||
1239 | sub eax, ebx |
||
1240 | sbb edx, ecx |
||
1241 | jb @B |
||
1242 | |||
1243 | pop eax |
||
1244 | pop ebx |
||
1245 | pop edx |
||
1246 | pop ecx |
||
1247 | ret |
||
1248 | endp |
||
1249 | |||
520 | serge | 1250 | align 4 |
1251 | proc create_ring_buffer stdcall, size:dword, flags:dword |
||
1252 | locals |
||
1253 | buf_ptr dd ? |
||
1254 | endl |
||
237 | serge | 1255 | |
520 | serge | 1256 | mov eax, [size] |
1257 | test eax, eax |
||
1258 | jz .fail |
||
1259 | |||
1260 | add eax, eax |
||
1261 | stdcall alloc_kernel_space, eax |
||
1262 | test eax, eax |
||
1263 | jz .fail |
||
1264 | |||
662 | serge | 1265 | push ebx |
1266 | |||
520 | serge | 1267 | mov [buf_ptr], eax |
1268 | |||
1269 | mov ebx, [size] |
||
1270 | shr ebx, 12 |
||
1271 | push ebx |
||
1272 | |||
1273 | stdcall alloc_pages, ebx |
||
1274 | pop ecx |
||
1275 | |||
1276 | test eax, eax |
||
1277 | jz .mm_fail |
||
1278 | |||
662 | serge | 1279 | push edi |
1280 | |||
520 | serge | 1281 | or eax, [flags] |
1282 | mov edi, [buf_ptr] |
||
1283 | mov ebx, [buf_ptr] |
||
1284 | mov edx, ecx |
||
566 | serge | 1285 | shl edx, 2 |
520 | serge | 1286 | shr edi, 10 |
1287 | @@: |
||
1288 | mov [page_tabs+edi], eax |
||
1289 | mov [page_tabs+edi+edx], eax |
||
1290 | add eax, 0x1000 |
||
1291 | add ebx, 0x1000 |
||
566 | serge | 1292 | add edi, 4 |
520 | serge | 1293 | dec ecx |
1294 | jnz @B |
||
1295 | |||
1296 | mov eax, [buf_ptr] |
||
662 | serge | 1297 | pop edi |
1298 | pop ebx |
||
520 | serge | 1299 | ret |
1300 | .mm_fail: |
||
1301 | stdcall free_kernel_space, [buf_ptr] |
||
1302 | xor eax, eax |
||
662 | serge | 1303 | pop ebx |
520 | serge | 1304 | .fail: |
1305 | ret |
||
1306 | endp0>> |
||
1307 |