| 2346,6 → 2346,8 |
|---|
| |
| uglobal |
| ; bgrchanged dd 0x0 |
| bgrlock db 0 |
| bgrlockpid dd 0 |
| endg |
| |
| sys_background: |
| 2356,6 → 2358,14 |
|---|
| je sbgrr |
| cmp ecx,0 |
| je sbgrr |
| @@: |
| mov al, 1 |
| xchg [bgrlock], al |
| test al, al |
| jz @f |
| call change_task |
| jmp @b |
| @@: |
| mov [BgrDataWidth],ebx |
| mov [BgrDataHeight],ecx |
| ; mov [bgrchanged],1 |
| 2379,12 → 2389,13 |
|---|
| lea eax,[eax*3] |
| mov [mem_BACKGROUND],eax |
| ; get memory for new background |
| stdcall kernel_alloc, [mem_BACKGROUND] |
| stdcall kernel_alloc, eax |
| test eax, eax |
| jz .exit_mem |
| mov [img_background], eax |
| .exit_mem: |
| popad |
| mov [bgrlock], 0 |
| |
| sbgrr: |
| ret |
| 2444,9 → 2455,87 |
|---|
| ret |
| nosb5: |
| |
| cmp eax, 6 |
| jnz nosb6 |
| @@: |
| mov al, 1 |
| xchg [bgrlock], al |
| test al, al |
| jz @f |
| call change_task |
| jmp @b |
| @@: |
| mov eax, [CURRENT_TASK] |
| mov [bgrlockpid], eax |
| stdcall user_alloc, [mem_BACKGROUND] |
| mov [esp+36], eax |
| test eax, eax |
| jz .nomem |
| mov ebx, eax |
| shr ebx, 12 |
| or dword [page_tabs+(ebx-1)*4], DONT_FREE_BLOCK |
| mov esi, [img_background] |
| shr esi, 12 |
| mov ecx, [mem_BACKGROUND] |
| add ecx, 0xFFF |
| shr ecx, 12 |
| .z: |
| mov eax, [page_tabs+ebx*4] |
| test al, 1 |
| jz @f |
| call free_page |
| @@: |
| mov eax, [page_tabs+esi*4] |
| or al, PG_UW |
| mov [page_tabs+ebx*4], eax |
| mov eax, ebx |
| shl eax, 12 |
| invlpg [eax] |
| inc ebx |
| inc esi |
| loop .z |
| ret |
| .nomem: |
| and [bgrlockpid], 0 |
| mov [bgrlock], 0 |
| nosb6: |
| cmp eax, 7 |
| jnz nosb7 |
| cmp [bgrlock], 0 |
| jz .err |
| mov eax, [CURRENT_TASK] |
| cmp [bgrlockpid], eax |
| jnz .err |
| mov eax, ebx |
| shr eax, 12 |
| mov ecx, [page_tabs+(eax-1)*4] |
| test cl, USED_BLOCK+DONT_FREE_BLOCK |
| jz .err |
| jnp .err |
| push eax |
| shr ecx, 12 |
| @@: |
| and dword [page_tabs+eax*4], 0 |
| mov edx, eax |
| shl edx, 12 |
| invlpg [edx] |
| inc eax |
| loop @b |
| pop eax |
| and dword [page_tabs+(eax-1)*4], not DONT_FREE_BLOCK |
| stdcall user_free, ebx |
| mov [esp+36], eax |
| and [bgrlockpid], 0 |
| mov [bgrlock], 0 |
| ret |
| .err: |
| and dword [esp+36], 0 |
| ret |
| |
| nosb7: |
| ret |
| |
| |
| align 4 |
| |
| sys_getbackground: |