| | 399 | |
| | 400 | int VirtChangeProtection(DWORD start, DWORD end, int protection) |
| | 401 | { |
| | 402 | DWORD address; |
| | 403 | |
| | 404 | for (address=start; address<end; address+=PAGE_SIZE) |
| | 405 | { |
| | 406 | DWORD virtEnt=PGDIR_ENT(address); |
| | 407 | |
| | 408 | if (pageDir[virtEnt]) |
| | 409 | { |
| | 410 | if (pageTable[PGTABLE_ENT(address)] & PAGE_PRESENT) |
| | 411 | { |
| | 412 | pageTable[PGTABLE_ENT(address)] &= ~(0xFFF); |
| | 413 | pageTable[PGTABLE_ENT(address)] |= protection; |
| | 414 | // KePrint("address = %#X\n", pageTable[PGTABLE_ENT(address)]); |
| | 415 | } |
| | 416 | } |
| | 417 | } |
| | 418 | |
| | 419 | return 0; |
| | 420 | } |
| | 421 | |
| | 422 | SYMBOL_EXPORT(VirtChangeProtection); |
