$Revision$ ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; ;; Distributed under terms of the GNU General Public License ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; align 4 proc alloc_page pushfd cli mov ebx, [page_start] mov ecx, [page_end] .l1: bsf eax,[ebx]; jnz .found add ebx,4 cmp ebx, ecx jb .l1 popfd xor eax,eax ret .found: btr [ebx], eax mov [page_start],ebx sub ebx, sys_pgmap lea eax, [eax+ebx*8] shl eax, 12 dec [pg_data.pages_free] popfd ret endp align 4 proc alloc_pages stdcall, count:dword pushfd cli mov eax, [count] add eax, 7 shr eax, 3 mov [count], eax cmp eax, [pg_data.pages_free] ja .fail mov ecx, [page_start] mov ebx, [page_end] .find: mov edx, [count] mov edi, ecx .match: cmp byte [ecx], 0xFF jne .next dec edx jz .ok inc ecx cmp ecx,ebx jb .match .fail: xor eax, eax popfd ret .next: inc ecx cmp ecx, ebx jb .find popfd xor eax, eax ret .ok: sub ecx, edi inc ecx mov esi, edi xor eax, eax rep stosb sub esi, sys_pgmap shl esi, 3+12 mov eax, esi mov ebx, [count] shl ebx, 3 sub [pg_data.pages_free], ebx popfd ret endp align 4 proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword push ebx mov eax, [phis_addr] and eax, not 0xFFF or eax, [flags] mov ebx, [lin_addr] shr ebx, 12 mov [page_tabs+ebx*4], eax mov eax, [lin_addr] invlpg [eax] pop ebx ret endp align 4 map_space: ;not implemented ret align 4 proc free_page ;arg: eax page address pushfd cli shr eax, 12 ;page index bts dword [sys_pgmap], eax ;that's all! cmc adc [pg_data.pages_free], 0 shr eax, 3 and eax, not 3 ;dword offset from page_map add eax, sys_pgmap cmp [page_start], eax ja @f popfd ret @@: mov [page_start], eax popfd ret endp ; param ; eax= page base + page flags ; ebx= liear address ; ecx= count align 4 commit_pages: test ecx, ecx jz .fail mov edi, ebx mov ebx, pg_data.pg_mutex call wait_mutex ;ebx mov edx, 0x1000 mov ebx, edi shr ebx, 12 @@: mov [page_tabs+ebx*4], eax invlpg [edi] add edi, edx add eax, edx inc ebx dec ecx jnz @B mov [pg_data.pg_mutex],ecx .fail: ret ; param ; eax= base ; ecx= count align 4 release_pages: pushad mov ebx, pg_data.pg_mutex call wait_mutex ;ebx mov esi, eax mov edi, eax shr esi, 10 add esi, page_tabs mov ebp, [pg_data.pages_free] mov ebx, [page_start] mov edx, sys_pgmap @@: xor eax, eax xchg eax, [esi] invlpg [edi] test eax, 1 jz .next shr eax, 12 bts [edx], eax cmc adc ebp, 0 shr eax, 3 and eax, -4 add eax, edx cmp eax, ebx jae .next mov ebx, eax .next: add edi, 0x1000 add esi, 4 dec ecx jnz @B mov [pg_data.pages_free], ebp and [pg_data.pg_mutex],0 popad ret align 4 proc map_page_table stdcall, lin_addr:dword, phis_addr:dword push ebx mov ebx, [lin_addr] shr ebx, 22 mov eax, [phis_addr] and eax, not 0xFFF or eax, PG_UW ;+PG_NOCACHE mov dword [master_tab+ebx*4], eax mov eax, [lin_addr] shr eax, 10 add eax, page_tabs invlpg [eax] pop ebx ret endp align 4 proc init_LFB locals pg_count dd ? endl cmp dword [LFBAddress], -1 jne @f mov [BOOT_VAR+0x901c],byte 2 stdcall kernel_alloc, 0x280000 mov [LFBAddress], eax ret @@: test [SCR_MODE],word 0100000000000000b jnz @f mov [BOOT_VAR+0x901c],byte 2 ret @@: call init_mtrr mov edx, LFB_BASE mov esi, [LFBAddress] mov edi, 0x00800000 mov dword [exp_lfb+4], edx shr edi, 12 mov [pg_count], edi shr edi, 10 bt [cpu_caps], CAPS_PSE jnc .map_page_tables or esi, PG_LARGE+PG_UW mov edx, sys_pgdir+(LFB_BASE shr 20) @@: mov [edx], esi add edx, 4 add esi, 0x00400000 dec edi jnz @B bt [cpu_caps], CAPS_PGE jnc @F or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL @@: mov dword [LFBAddress], LFB_BASE mov eax, cr3 ;flush TLB mov cr3, eax ret .map_page_tables: @@: call alloc_page stdcall map_page_table, edx, eax add edx, 0x00400000 dec edi jnz @B mov eax, [LFBAddress] mov edi, page_tabs + (LFB_BASE shr 10) or eax, PG_UW mov ecx, [pg_count] cld @@: stosd add eax, 0x1000 dec ecx jnz @B mov dword [LFBAddress], LFB_BASE mov eax, cr3 ;flush TLB mov cr3, eax ret endp align 4 proc new_mem_resize stdcall, new_size:dword mov ebx, pg_data.pg_mutex call wait_mutex ;ebx mov edi, [new_size] add edi,4095 and edi,not 4095 mov [new_size], edi mov edx,[current_slot] cmp [edx+APPDATA.heap_base],0 jne .exit mov esi, [edx+APPDATA.mem_size] add esi, 4095 and esi, not 4095 cmp edi, esi jae .expand shr edi, 12 shr esi, 12 @@: mov eax, [app_page_tabs+edi*4] test eax, 1 jz .next mov dword [app_page_tabs+edi*4], 2 mov ebx, edi shl ebx, 12 invlpg [ebx+std_application_base_address] call free_page .next: add edi, 1 cmp edi, esi jb @B .update_size: mov ebx, [new_size] call update_mem_size xor eax, eax dec [pg_data.pg_mutex] ret .expand: push esi push edi add edi, 0x3FFFFF and edi, not(0x3FFFFF) add esi, 0x3FFFFF and esi, not(0x3FFFFF) cmp esi, edi jae .grow xchg esi, edi @@: call alloc_page test eax, eax jz .exit stdcall map_page_table, edi, eax push edi shr edi, 10 add edi, page_tabs mov ecx, 1024 xor eax, eax cld rep stosd pop edi add edi, 0x00400000 cmp edi, esi jb @B .grow: pop edi pop esi @@: call alloc_page test eax, eax jz .exit stdcall map_page,esi,eax,dword PG_UW push edi mov edi, esi xor eax, eax mov ecx, 1024 cld rep stosd pop edi add esi, 0x1000 cmp esi, edi jb @B jmp .update_size .exit: xor eax, eax inc eax dec [pg_data.pg_mutex] ret endp update_mem_size: ; in: edx = slot base ; ebx = new memory size ; destroys eax,ecx,edx mov [APPDATA.mem_size+edx],ebx ;search threads and update ;application memory size infomation mov ecx,[APPDATA.dir_table+edx] mov eax,2 .search_threads: ;eax = current slot ;ebx = new memory size ;ecx = page directory cmp eax,[TASK_COUNT] jg .search_threads_end mov edx,eax shl edx,5 cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty? jz .search_threads_next shl edx,3 cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread? jnz .search_threads_next mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size .search_threads_next: inc eax jmp .search_threads .search_threads_end: ret ; param ; eax= linear address ; ; retval ; eax= phisical page address align 4 get_pg_addr: shr eax, 12 mov eax, [page_tabs+eax*4] and eax, 0xFFFFF000 ret align 4 proc page_fault_handler .err_code equ ebp+32 .err_addr equ ebp-4 pushad mov ebp, esp mov eax, cr2 push eax mov ax, app_data mov ds, ax mov es, ax inc [pg_data.pages_faults] ; push eax ; push edx ; mov edx, 0x400 ;bochs ; mov al,0xff ;bochs ; out dx, al ;bochs ; pop edx ; pop eax mov ebx, [.err_addr] mov eax, [.err_code] cmp ebx, OS_BASE jb .user_space ;страница в памяти приложения ; cmp ebx, page_tabs jb .kernel_space ;страница в памяти ядра cmp ebx, kernel_tabs jb .alloc;.app_tabs ;таблицы страниц приложения ; ;просто создадим одну cmp ebx, LFB_BASE jb .core_tabs ;таблицы страниц ядра ;Ошибка .lfb: ;область LFB ;Ошибка jmp .fail align 4 .user_space: test eax, PG_MAP jnz .err_access ;Страница присутствует ;Ошибка доступа ? shr ebx, 12 mov ecx, ebx shr ecx, 10 mov edx, [master_tab+ecx*4] test edx, PG_MAP jz .fail ;таблица страниц не создана ;неверный адрес в программе mov eax, [page_tabs+ebx*4] test eax, 2 jz .fail ;адрес не зарезервирован для ; ;использования. Ошибка .alloc: call alloc_page and eax, eax jz .fail stdcall map_page,[ebp-4],eax,dword PG_UW mov edi, [ebp-4] and edi, 0xFFFFF000 mov ecx, 1024 xor eax, eax cld rep stosd .exit: mov esp, ebp popad add esp, 4 iretd .err_access: ;никогда не происходит jmp .fail .kernel_space: test eax, PG_MAP jz .fail ;страница не присутствует test eax, 4 ;U/S jnz .fail ;приложение обратилось к памяти ;ядра test eax, 8 jnz .fail ;установлен зарезервированный бит ;в таблицах страниц. добавлено в P4/Xeon ;попытка записи в защищённую страницу ядра cmp ebx, tss._io_map_0 jb .fail cmp ebx, tss._io_map_0+8192 jae .fail ; io permission map ; copy-on-write protection call alloc_page and eax, eax jz .fail push eax stdcall map_page,[ebp-4],eax,dword PG_SW pop eax mov edi, [.err_addr] and edi, -4096 lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0 mov ebx, esi shr ebx, 12 mov edx, [current_slot] or eax, PG_SW mov [edx+APPDATA.io_map+ebx*4], eax add esi, [default_io_map] mov ecx, 4096/4 cld rep movsd jmp .exit ;не обрабатываем. Ошибка .core_tabs: .fail: mov esp, ebp popad add esp, 4 ; iretd save_ring3_context ;debugger support mov bl, 14 jmp exc_c iretd endp align 4 proc map_mem stdcall, lin_addr:dword,pdir:dword,\ ofs:dword,buf_size:dword mov eax, [buf_size] test eax, eax jz .exit mov eax, [pdir] and eax, 0xFFFFF000 stdcall map_page,[ipc_pdir],eax,dword PG_UW mov ebx, [ofs] shr ebx, 22 mov esi, [ipc_pdir] mov edi, [ipc_ptab] mov eax, [esi+ebx*4] and eax, 0xFFFFF000 test eax, eax jz .exit stdcall map_page,edi,eax,dword PG_UW ; inc ebx ; add edi, 0x1000 ; mov eax, [esi+ebx*4] ; test eax, eax ; jz @f ; and eax, 0xFFFFF000 ; stdcall map_page, edi, eax @@: mov edi, [lin_addr] and edi, 0xFFFFF000 mov ecx, [buf_size] add ecx, 4095 shr ecx, 12 inc ecx mov edx, [ofs] shr edx, 12 and edx, 0x3FF mov esi, [ipc_ptab] .map: mov eax, [esi+edx*4] and eax, 0xFFFFF000 test eax, eax jz .exit stdcall map_page,edi,eax,dword PG_UW add edi, 0x1000 inc edx dec ecx jnz .map .exit: ret endp align 4 proc map_memEx stdcall, lin_addr:dword,pdir:dword,\ ofs:dword,buf_size:dword mov eax, [buf_size] test eax, eax jz .exit mov eax, [pdir] and eax, 0xFFFFF000 stdcall map_page,[proc_mem_pdir],eax,dword PG_UW mov ebx, [ofs] shr ebx, 22 mov esi, [proc_mem_pdir] mov edi, [proc_mem_tab] mov eax, [esi+ebx*4] and eax, 0xFFFFF000 test eax, eax jz .exit stdcall map_page,edi,eax,dword PG_UW @@: mov edi, [lin_addr] and edi, 0xFFFFF000 mov ecx, [buf_size] add ecx, 4095 shr ecx, 12 inc ecx mov edx, [ofs] shr edx, 12 and edx, 0x3FF mov esi, [proc_mem_tab] .map: mov eax, [esi+edx*4] ; and eax, 0xFFFFF000 ; test eax, eax ; jz .exit stdcall map_page,edi,eax,dword PG_UW add edi, 0x1000 inc edx dec ecx jnz .map .exit: ret endp sys_IPC: ;input: ; eax=1 - set ipc buffer area ; ebx=address of buffer ; ecx=size of buffer ; eax=2 - send message ; ebx=PID ; ecx=address of message ; edx=size of message cmp eax,1 jne @f call set_ipc_buff mov [esp+36], eax ret @@: cmp eax, 2 jne @f stdcall sys_ipc_send, ebx, ecx, edx mov [esp+36], eax ret @@: xor eax, eax not eax mov [esp+36], eax ret align 4 proc set_ipc_buff mov eax,[current_slot] pushf cli mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area mov [eax+APPDATA.ipc_size],ecx add ecx, ebx add ecx, 4095 and ecx, not 4095 .touch: mov eax, [ebx] add ebx, 0x1000 cmp ebx, ecx jna .touch popf xor eax, eax ret endp proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword locals dst_slot dd ? dst_offset dd ? buf_size dd ? endl pushf cli mov eax, [PID] call pid_to_slot test eax,eax jz .no_pid mov [dst_slot], eax shl eax,8 mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined? test edi,edi jz .no_ipc_area mov ebx, edi ; add edi, new_app_base and ebx, 0xFFF mov [dst_offset], ebx mov esi, [eax+SLOT_BASE+0xa4] mov [buf_size], esi stdcall map_mem, [ipc_tmp], [SLOT_BASE+eax+0xB8],\ edi, esi mov edi, [dst_offset] add edi, [ipc_tmp] cmp dword [edi], 0 jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now mov ebx, dword [edi+4] mov edx, ebx add ebx, 8 add ebx, [msg_size] cmp ebx, [buf_size] ja .buffer_overflow ;esi<0 - not enough memory in buffer mov dword [edi+4], ebx mov eax,[TASK_BASE] mov eax, [eax+0x04] ;eax - our PID mov edi, [dst_offset] add edi, [ipc_tmp] add edi, edx mov [edi], eax mov ecx, [msg_size] mov [edi+4], ecx add edi, 8 mov esi, [msg_addr] ; add esi, new_app_base cld rep movsb mov ebx, [ipc_tmp] mov edx, ebx shr ebx, 12 xor eax, eax mov [page_tabs+ebx*4], eax invlpg [edx] mov ebx, [ipc_pdir] mov edx, ebx shr ebx, 12 xor eax, eax mov [page_tabs+ebx*4], eax invlpg [edx] mov ebx, [ipc_ptab] mov edx, ebx shr ebx, 12 xor eax, eax mov [page_tabs+ebx*4], eax invlpg [edx] mov eax, [dst_slot] shl eax, 8 or [eax+SLOT_BASE+0xA8],dword 0x40 cmp dword [check_idle_semaphore],20 jge .ipc_no_cis mov dword [check_idle_semaphore],5 .ipc_no_cis: popf xor eax, eax ret .no_pid: popf mov eax, 4 ret .no_ipc_area: popf xor eax, eax inc eax ret .ipc_blocked: popf mov eax, 2 ret .buffer_overflow: popf mov eax, 3 ret endp align 4 sysfn_meminfo: ; add ebx, new_app_base cmp ebx, OS_BASE jae .fail mov eax, [pg_data.pages_count] mov [ebx], eax shl eax, 12 mov [esp+36], eax mov ecx, [pg_data.pages_free] mov [ebx+4], ecx mov edx, [pg_data.pages_faults] mov [ebx+8], edx mov esi, [heap_size] mov [ebx+12], esi mov edi, [heap_free] mov [ebx+16], edi mov eax, [heap_blocks] mov [ebx+20], eax mov ecx, [free_blocks] mov [ebx+24], ecx ret .fail: mov dword [esp+36], -1 ret align 4 new_services: cmp eax,4 jle sys_sheduler cmp eax, 11 jb .fail ja @f call init_heap mov [esp+36], eax ret @@: cmp eax, 12 ja @f stdcall user_alloc, ebx mov [esp+36], eax ret @@: cmp eax, 13 ja @f stdcall user_free, ebx mov [esp+36], eax ret @@: cmp eax, 14 ja @f cmp ebx, OS_BASE jae .fail stdcall get_event_ex, ebx, ecx mov [esp+36], eax ret @@: cmp eax, 15 ja @f mov ecx, [current_slot] mov eax, [ecx+APPDATA.fpu_handler] mov [ecx+APPDATA.fpu_handler], ebx mov [esp+36], eax ret @@: cmp eax, 16 ja @f test ebx, ebx jz .fail cmp ebx, OS_BASE jae .fail stdcall get_service, ebx mov [esp+36], eax ret @@: cmp eax, 17 ja @f call srv_handlerEx ;ebx mov [esp+36], eax ret @@: cmp eax, 18 ja @f mov ecx, [current_slot] mov eax, [ecx+APPDATA.sse_handler] mov [ecx+APPDATA.sse_handler], ebx mov [esp+36], eax ret @@: cmp eax, 19 ja @f cmp ebx, OS_BASE jae .fail stdcall load_library, ebx mov [esp+36], eax ret @@: cmp eax, 20 ja .fail mov eax, ecx call user_realloc mov [esp+36], eax ret .fail: xor eax, eax mov [esp+36], eax ret align 4 proc init_mtrr cmp [BOOT_VAR+0x901c],byte 2 je .exit bt [cpu_caps], CAPS_MTRR jnc .exit mov eax, cr0 or eax, 0x60000000 ;disable caching mov cr0, eax wbinvd ;invalidate cache mov ecx, 0x2FF rdmsr ; push eax xor edx, edx xor eax, eax mov ecx, 0x2FF wrmsr ;disable all MTRR stdcall set_mtrr, dword 0,dword 0,[MEM_AMOUNT],MEM_WB stdcall set_mtrr, dword 1,[LFBAddress],[LFBSize],MEM_WC xor edx, edx xor eax, eax mov ecx, 0x204 mov ebx, 6 @@: wrmsr ;disable unused MTRR inc ecx wrmsr inc ecx dec ebx jnz @b wbinvd ;again invalidate pop eax or eax, 0x800 ;set default memtype to UC and al, 0xF0 mov ecx, 0x2FF wrmsr ;and enable MTRR mov eax, cr0 and eax, not 0x60000000 mov cr0, eax ; enable caching .exit: ret endp align 4 proc set_mtrr stdcall, reg:dword,base:dword,size:dword,mem_type:dword xor edx, edx mov eax, [base] or eax, [mem_type] mov ecx, [reg] lea ecx, [0x200+ecx*2] wrmsr mov ebx, [size] dec ebx mov eax, 0xFFFFFFFF mov edx, 0x0000000F sub eax, ebx sbb edx, 0 or eax, 0x800 inc ecx wrmsr ret endp align 4 proc strncmp stdcall, str1:dword, str2:dword, count:dword mov ecx,[count] jecxz .end mov ebx,ecx mov edi,[str1] mov esi,edi xor eax,eax repne scasb neg ecx ; cx = count - strlen add ecx,ebx ; strlen + count - strlen .okay: mov edi,esi mov esi,[str2] repe cmpsb mov al,[esi-1] xor ecx,ecx cmp al,[edi-1] ja .str2_big je .end .str1_big: sub ecx,2 .str2_big: not ecx .end: mov eax,ecx ret endp align 4 proc stall stdcall, delay:dword push ecx push edx push ebx push eax mov eax, [delay] mul [stall_mcs] mov ebx, eax ;low mov ecx, edx ;high rdtsc add ebx, eax adc ecx,edx @@: rdtsc sub eax, ebx sbb edx, ecx jb @B pop eax pop ebx pop edx pop ecx ret endp align 4 k_strrchr: push eax xor eax,eax or ecx,-1 repne scasb add ecx,1 neg ecx sub edi,1 pop eax std repne scasb cld add edi,1 cmp [edi],al jne @F mov eax,edi ret @@: xor eax,eax ret align 4 proc k_strncpy stdcall, dest:dword, src:dword, maxlen:dword mov eax, [dest] mov esi, [src] mov ecx, [maxlen] test eax, eax jz .L9 test esi, esi jz .L9 test ecx, ecx jz .L9 sub esi, eax jmp .L1 align 4 .L2: mov edx, [esi+eax] mov [eax], dl test dl, dl jz .L7 mov [eax+1], dh test dh, dh jz .L6 shr edx, 16 mov [eax+2],dl test dl, dl jz .L5 mov [eax+3], dh test dh, dh jz .L4 add eax, 4 .L1: sub ecx, 4 jae .L2 add ecx, 4 jz .L9 mov dl, [eax+esi] mov [eax], dl test dl, dl jz .L3 inc eax dec ecx jz .L9 mov dl, [eax+esi] mov [eax], dl test dl, dl jz .L3 inc eax dec ecx jz .L9 mov dl, [eax+esi] mov [eax], dl test dl, dl jz .L3 inc eax jmp .L9 .L4: dec ecx inc eax .L5: dec ecx inc eax .L6: dec ecx inc eax .L7: add ecx,3 jz .L9 .L8: mov byte [ecx+eax], 0 .L3: dec ecx jnz .L8 .L9: ret endp if 0 magic equ 0xfefefeff k_strlen: mov eax,[esp+4] mov edx, 3 and edx, eax jz .L1 jp .L0 cmp dh, byte [eax] je .L2 inc eax cmp dh, byte [eax] je .L2 inc eax xor edx, 2 jz .L1 .L0: cmp dh, [eax] je .L2 inc eax xor edx, edx .L1: mov ecx, [eax] add eax, 4 sub edx, ecx add ecx, magic dec edx jnc .L3 xor edx, ecx and edx, not magic jne .L3 mov ecx, [eax] add eax, 4 sub edx, ecx add ecx, magic dec edx jnc .L3 xor edx, ecx and edx, not magic jne .L3 mov ecx, [eax] add eax, 4 sub edx, ecx add ecx, magic dec edx jnc .L3 xor edx, ecx and edx, not magic jne .L3 mov ecx, [eax] add eax, 4 sub edx, ecx add ecx, magic dec edx jnc .L3 xor edx, ecx and edx, not magic je .L1 .L3: sub eax ,4 sub ecx, magic cmp cl, 0 jz .L2 inc eax test ch, ch jz .L2 shr ecx, 16 inc eax cmp cl,0 jz .L2 inc eax .L2: sub eax, [esp+4] ret end if if 0 push eax push edx mov edx, 0x400 ;bochs mov al,0xff ;bochs out dx, al ;bochs pop edx pop eax end if