| 49,11 → 49,12 |
|---|
| ; first half (0x800 bytes) is page table for addresses 0 - 0x100000, |
| ; second half is for V86-to-linear translation. |
| ; Third and fourth are for I/O permission map. |
| mov ecx, 2 |
| call @core_alloc@4 |
| |
| mov ecx, 0x4000 |
| mov edx, PG_SW |
| call @mem_alloc@8 |
| test eax, eax |
| jz .fail2 |
| add eax, OS_BASE |
| mov [ebx+V86_machine.pagedir], eax |
| push edi eax |
| mov edi, eax |
| 72,14 → 73,14 |
|---|
| mov edi, eax |
| add eax, 1000h |
| push eax |
| sub eax, OS_BASE |
| call get_pg_addr |
| or al, PG_UW |
| stosd |
| ; ...and also copy system page tables |
| ; thx to Serge, system is located at high addresses |
| add edi, (OS_BASE shr 20) - 4 |
| add edi, (HEAP_BASE shr 20) - 4 |
| push esi |
| mov esi, (OS_BASE shr 20) + _sys_pdbr |
| mov esi, (HEAP_BASE shr 20) + _sys_pdbr |
| mov ecx, 0x80000000 shr 22 |
| rep movsd |
| |
| 110,6 → 111,7 |
|---|
| mov [edi+800h], eax |
| lea eax, [edx + 111b] |
| stosd |
| add edx, 0x1000 |
| loop @b |
| pop eax |
| pop edi |
| 145,8 → 147,7 |
|---|
| push eax |
| |
| mov ecx, [eax+V86_machine.pagedir] |
| sub ecx, OS_BASE |
| call @core_free@4 |
| call @mem_free@4 |
| |
| pop eax |
| jmp free |
| 300,10 → 301,10 |
|---|
| push dword [ecx+APPDATA.io_map] |
| push dword [ecx+APPDATA.io_map+4] |
| mov dword [ecx+APPDATA.io_map], eax |
| mov dword [page_tabs + (tss._io_map_0 shr 10)], eax |
| ; mov dword [page_tabs + (tss._io_map_0 shr 10)], eax |
| add eax, 0x1000 |
| mov dword [ecx+APPDATA.io_map+4], eax |
| mov dword [page_tabs + (tss._io_map_1 shr 10)], eax |
| ; mov dword [page_tabs + (tss._io_map_1 shr 10)], eax |
| |
| push [ecx+APPDATA.dir_table] |
| push [ecx+APPDATA.saved_esp0] |
| 820,10 → 821,10 |
|---|
| mov [SLOT_BASE+ecx+APPDATA.dir_table], eax |
| pop ebx |
| mov dword [SLOT_BASE+ecx+APPDATA.io_map+4], ebx |
| mov dword [page_tabs + (tss._io_map_1 shr 10)], ebx |
| ; mov dword [page_tabs + (tss._io_map_1 shr 10)], ebx |
| pop ebx |
| mov dword [SLOT_BASE+ecx+APPDATA.io_map], ebx |
| mov dword [page_tabs + (tss._io_map_0 shr 10)], ebx |
| ; mov dword [page_tabs + (tss._io_map_0 shr 10)], ebx |
| mov cr3, eax |
| ; mov [irq_tab+5*4], 0 |
| sti |