Subversion Repositories Kolibri OS

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;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;

;;  Distributed under terms of the GNU General Public License.  ;;

;;                                                              ;;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision: 6502 $

GREEDY_KERNEL  equ 0

struct  APP_HEADER_00_

        banner          dq ?

        version         dd ?    ;+8

        start           dd ?    ;+12

        i_end           dd ?    ;+16

        mem_size        dd ?    ;+20

        i_param         dd ?    ;+24

ends

struct  APP_HEADER_01_

        banner          dq ?

        version         dd ?    ;+8

        start           dd ?    ;+12

        i_end           dd ?    ;+16

        mem_size        dd ?    ;+20

        stack_top       dd ?    ;+24

        i_param         dd ?    ;+28

        i_icon          dd ?    ;+32

ends

struct  APP_HDR

        cmdline         rd 1    ;0x00

        path            rd 1    ;0x04

        eip             rd 1    ;0x08

        esp             rd 1    ;0x0C

        _edata          rd 1    ;0x10

        _emem           rd 1    ;0x14

        img_base        rd 1    ;0x18

        img_size        rd 1

        filename_size   rd 1

        cmdline_size    rd 1

        path_string     rd 1

ends

macro _clear_ op

{  mov ecx, op/4

        xor     eax, eax

        cld

        rep stosd

}

align 4

_strnlen:

        mov     edx, ecx

        xor     eax, eax

        repne scasb

        jne     @F

        inc     ecx

@@:

        mov     eax, edx

        sub     eax, ecx

        retn

fs_execute_from_sysdir:

        xor     ebx, ebx

fs_execute_from_sysdir_param:

        xor     edx, edx

proc fs_execute

; ebx - cmdline

; edx - flags

; ebp - full filename

    locals

        cmdline         rd  1

        flags           rd  1

        slot            rd  1

        slot_base       rd  1

; app header data

        hdr_cmdline     rd  1

        hdr_path        rd  1

        hdr_eip         rd  1

        hdr_esp         rd  1

        hdr_edata       rd  1

        hdr_emem        rd  1

        file_base       rd  1

        file_size       rd  1

        filename_size   rd  1

        cmdline_size    rd  1

        path_string     rd  1

    endl

        mov     [flags], edx

        mov     [cmdline], ebx

        stdcall kernel_alloc, maxPathLength

        mov     [path_string], eax

        mov     ebx, [ebp]

        stdcall get_full_file_name, eax, maxPathLength

        test    eax, eax

        jz      .err_file

        stdcall load_file, [path_string]

        mov     esi, -ERROR_FILE_NOT_FOUND

        test    eax, eax

        jz      .err_file

        mov     [file_base], eax

        mov     [file_size], ebx

        lea     ebx, [hdr_cmdline]

        call    test_app_header

        mov     esi, -0x1F

        test    eax, eax

        jz      .err_hdr

        call    lock_application_table

        call    alloc_thread_slot

        mov     esi, -0x20  ; too many processes

        test    eax, eax

        jz      .err_0

        mov     [slot], eax

        shl     eax, 8

        lea     edi, [SLOT_BASE+eax]

        mov     [slot_base], edi

; clean extended information about process

        mov     ecx, 256/4

        xor     eax, eax

        cld

        rep stosd

; write application name

        stdcall strrchr, [path_string], '/'

        lea     esi, [eax+1]    ; -> name without path

        mov     ecx, 11

        mov     edi, [slot_base]

@@:

        call    utf8to16

        call    uni2ansi_char

        cmp     al, '.'

        jz      @f

        test    al, al

        jz      @f

        stosb

        loop    @b

@@:

        mov     edi, [cmdline]

        xor     eax, eax

        test    edi, edi

        jz      @f

        mov     ecx, 65535

        call    _strnlen

        cmp     eax, 256

        jb      @f

        lea     ebx, [eax+1]

        add     [hdr_emem], ebx

@@:

        mov     [cmdline_size], eax

        stdcall create_process, [hdr_emem]

        mov     esi, -30    ; no memory

        test    eax, eax

        jz      .err_hdr

        mov     ebx, [sys_proc+LHEAD.prev]

        __list_add eax, ebx, sys_proc

        mov     ebx, [hdr_emem]

        mov     [eax+PROC.mem_used], ebx

        mov     ebx, [slot_base]

        mov     [ebx+APPDATA.process], eax

        lea     edx, [ebx+APPDATA.list]

        lea     ecx, [eax+PROC.thr_list]

        list_add_tail edx, ecx

        mov     edi, [path_string]

        mov     ecx, maxPathLength

        call    _strnlen

        mov     [filename_size], eax

        mov     eax, [cmdline_size]

        add     eax, sizeof.APP_HDR

        stdcall kernel_alloc, eax

        mov     [ebx+APPDATA.exec_params], eax

        mov     edi, eax

        lea     esi, [hdr_cmdline]

        mov     ecx, sizeof.APP_HDR/4

        rep movsd

        mov     ecx, [cmdline_size]

        mov     esi, [cmdline]

        rep movsb

        lea     eax, [hdr_cmdline]

        stdcall set_app_params , [slot], eax, [flags]

        mov     eax, [process_number]   ;set result

        call    unlock_application_table

        ret

.err_0:

        call    unlock_application_table

.err_hdr:

        stdcall kernel_free, [file_base]

.err_file:

        stdcall kernel_free, [path_string]

        mov     eax, esi

        ret

endp

align 4

test_app_header:

       virtual at eax

         APP_HEADER_00 APP_HEADER_00_

       end virtual

       virtual at eax

         APP_HEADER_01 APP_HEADER_01_

       end virtual

        cmp     dword [eax], 'MENU'

        jne     .fail

        cmp     word [eax+4], 'ET'

        jne     .fail

        cmp     [eax+6], word '00'

        jne     .check_01_header

        mov     ecx, [APP_HEADER_00.start]

        mov     [ebx+APP_HDR.eip], ecx

        mov     edx, [APP_HEADER_00.mem_size]

        mov     [ebx+APP_HDR._emem], edx

        shr     edx, 1

        sub     edx, 0x10

        mov     [ebx+APP_HDR.esp], edx

        mov     ecx, [APP_HEADER_00.i_param]

        mov     [ebx+APP_HDR.cmdline], ecx

        mov     [ebx+APP_HDR.path], 0

        mov     edx, [APP_HEADER_00.i_end]

        mov     [ebx+APP_HDR._edata], edx

        ret

 .check_01_header:

        cmp     [eax+6], word '01'

        je      @f

        cmp     [eax+6], word '02'

        jne     .fail

@@:

        mov     ecx, [APP_HEADER_01.start]

        mov     [ebx+0x08], ecx

        mov     edx, [APP_HEADER_01.mem_size]

; \begin{diamond}[20.08.2006]

; sanity check (functions 19,58 load app_i_end bytes and that must

; fit in allocated memory to prevent kernel faults)

        cmp     edx, [APP_HEADER_01.i_end]

        jb      .fail

; \end{diamond}[20.08.2006]

        mov     [ebx+APP_HDR._emem], edx

        mov     ecx, [APP_HEADER_01.stack_top]

        mov     [ebx+APP_HDR.esp], ecx

        mov     edx, [APP_HEADER_01.i_param]

        mov     [ebx+APP_HDR.cmdline], edx

        mov     ecx, [APP_HEADER_01.i_icon]

        mov     [ebx+APP_HDR.path], ecx

        mov     edx, [APP_HEADER_01.i_end]

        mov     [ebx+APP_HDR._edata], edx

        ret

.fail:

        xor     eax, eax

        ret

align 4

alloc_thread_slot:

;input:

;  none

;result:

;  eax=[new_thread_slot]<>0 - ok

;      0 - failed.

;This function find least empty slot.

;It doesn't increase [TASK_COUNT]!

        mov     edx, thr_slot_map

        pushfd

        cli

.l1:

        bsf     eax, [edx]

        jnz     .found

        add     edx, 4

        cmp     edx, thr_slot_map+32

        jb      .l1

        popfd

        xor     eax, eax

        ret

.found:

        btr     [edx], eax

        sub     edx, thr_slot_map

        lea     eax, [eax+edx*8]

        popfd

        ret

align 4

proc create_process stdcall, app_size:dword

       locals

         process     dd ?

         app_tabs    dd ?

       endl

        push    ebx

        push    esi

        push    edi

        xor     eax, eax

        mov     [process], eax

        mov     eax, [app_size]

        add     eax, 0x3FFFFF

        shr     eax, 22

        mov     [app_tabs], eax

        stdcall kernel_alloc, 0x2000

        test    eax, eax

        jz      .fail

        mov     [process], eax

        lea     edi, [eax+PROC.heap_lock]

        mov     ecx, (PROC.ht_free-PROC.heap_lock)/4

        list_init eax

        add     eax, PROC.thr_list

        list_init eax

        xor     eax, eax

        cld

        rep stosd

        mov     [edi], dword (PROC.pdt_0 - PROC.htab)/4 - 3

        mov     [edi+4], dword 3           ;reserve handles for stdin stdout and stderr

        mov     ecx, (PROC.pdt_0 - PROC.htab)/4

        add     edi, 8

        inc     eax

@@:

        stosd

        inc     eax

        cmp     eax, ecx

        jbe     @B

        mov     eax, edi

        call    get_pg_addr

        mov     [edi-4096+PROC.pdt_0_phys], eax

        mov     ecx, (OS_BASE shr 20)/4

        xor     eax, eax

        rep stosd

        mov     ecx, (OS_BASE shr 20)/4

        mov     esi, sys_proc+PROC.pdt_0+(OS_BASE shr 20)

        rep movsd

        mov     eax, [edi-8192+PROC.pdt_0_phys]

        or      eax, PG_SWR

        mov     [edi-4096+(page_tabs shr 20)], eax

        lea     edx, [edi-4096]

        mov     esi, [app_tabs]

.alloc_page_dir:

        call    alloc_page

        test    eax, eax

        jz      .fail

        or      eax, PG_UWR

        mov     [edx], eax

        mov     edi, [tmp_task_ptab]

        stdcall map_page, edi, eax, PG_SWR

        mov     ecx, 1024

        xor     eax, eax

        rep stosd

        add     edx, 4

        dec     esi

        jnz     .alloc_page_dir

        stdcall map_page, [tmp_task_ptab], 0, PG_UNMAP

        mov     eax, [process]

        pop     edi

        pop     esi

        pop     ebx

        ret

.fail:

        mov     ecx, [process]

        jcxz    @F

        call    destroy_process

@@:

        xor     eax, eax

        pop     edi

        pop     esi

        pop     ebx

        ret

endp

align 4

proc destroy_page_table stdcall, pg_tab:dword

        push    esi

        mov     esi, [pg_tab]

        mov     ecx, 1024

.free:

        mov     eax, [esi]

        test    eax, 1

        jz      .next

        test    eax, 2

        jz      .next

        test    eax, 1 shl 9

        jnz     .next                     ;skip shared pages

        call    free_page

.next:

        add     esi, 4

        dec     ecx

        jnz     .free

        pop     esi

        ret

endp

align 4

destroy_process: ;fastcall ecx= ptr to process

        lea     eax, [ecx+PROC.thr_list]

        cmp     eax, [eax+LHEAD.next]

        jne     .exit

align 4

.internal:

        push    ecx

        mov     esi, ecx

        list_del esi

        mov     esi, [esi+PROC.dlls_list_ptr]

        call    destroy_all_hdlls

        mov     esi, [esp]

        add     esi, PROC.pdt_0

        mov     edi, (0x80000000 shr 20)/4

.destroy:

        mov     eax, [esi]

        test    eax, 1

        jz      .next

        and     eax, not 0xFFF

        stdcall map_page, [tmp_task_ptab], eax, PG_SWR

        stdcall destroy_page_table, [tmp_task_ptab]

        mov     eax, [esi]

        call    free_page

.next:

        add     esi, 4

        dec     edi

        jnz     .destroy

        call    kernel_free     ;ecx still in stack

        stdcall map_page, [tmp_task_ptab], 0, PG_UNMAP

.exit:

        ret

align 4

get_pid:

        mov     eax, [TASK_BASE]

        mov     eax, [eax+TASKDATA.pid]

        ret

pid_to_slot:

;Input:

;  eax - pid of process

;Output:

;  eax - slot of process or 0 if process don't exists

;Search process by PID.

        push    ebx

        push    ecx

        mov     ebx, [TASK_COUNT]

        shl     ebx, 5

        mov     ecx, 2*32

.loop:

;ecx=offset of current process info entry

;ebx=maximum permitted offset

        cmp     byte [CURRENT_TASK+ecx+0xa], 9

        jz      .endloop ;skip empty slots

        cmp     [CURRENT_TASK+ecx+0x4], eax;check PID

        jz      .pid_found

.endloop:

        add     ecx, 32

        cmp     ecx, ebx

        jle     .loop

        pop     ecx

        pop     ebx

        xor     eax, eax

        ret

.pid_found:

        shr     ecx, 5

        mov     eax, ecx ;convert offset to index of slot

        pop     ecx

        pop     ebx

        ret

check_region:

;input:

;  esi - start of buffer

;  edx - size of buffer

;result:

;  eax = 1 region lays in app memory

;  eax = 0 region don't lays in app memory

        mov     eax, 1

        ret

if 0

        mov     eax, [CURRENT_TASK]

;     jmp  check_process_region

;-----------------------------------------------------------------------------

;check_process_region:

;input:

;  eax - slot

;  esi - start of buffer

;  edx - size of buffer

;result:

;  eax = 1 region lays in app memory

;  eax = 0 region don't lays in app memory

        test    edx, edx

        jle     .ok

        shl     eax, 5

        cmp     word [CURRENT_TASK+eax+0xa], 0

        jnz     .failed

        shl     eax, 3

        mov     eax, [SLOT_BASE+eax+0xb8]

        test    eax, eax

        jz      .failed

        mov     eax, 1

        ret

.ok:

        mov     eax, 1

        ret

.failed:

        xor     eax, eax

        ret

end if

align 4

proc read_process_memory

;Input:

;  eax - process slot

;  ecx - buffer address

;  edx - buffer size

;  esi - start address in other process

;Output:

;  eax - number of bytes read.

       locals

         slot   dd ?

         buff   dd ?

         r_count    dd ?

         offset dd ?

         tmp_r_cnt  dd ?

       endl

        mov     [slot], eax

        mov     [buff], ecx

        and     [r_count], 0

        mov     [tmp_r_cnt], edx

        mov     [offset], esi

        pushad

.read_mem:

        mov     edx, [offset]

        mov     ebx, [tmp_r_cnt]

        mov     ecx, 0x400000

        and     edx, 0x3FFFFF

        sub     ecx, edx

        cmp     ecx, ebx

        jbe     @f

        mov     ecx, ebx

@@:

        cmp     ecx, 0x8000

        jna     @F

        mov     ecx, 0x8000

@@:

        mov     ebx, [offset]

        push    ecx

        stdcall map_memEx, [proc_mem_map], \

                [slot], ebx, ecx, PG_READ

        pop     ecx

        mov     esi, [offset]

        and     esi, 0xfff

        sub     eax, esi

        jbe     .ret

        cmp     ecx, eax

        jbe     @f

        mov     ecx, eax

        mov     [tmp_r_cnt], eax

@@:

        add     esi, [proc_mem_map]

        mov     edi, [buff]

        mov     edx, ecx

        rep movsb

        add     [r_count], edx

        add     [offset], edx

        sub     [tmp_r_cnt], edx

        jnz     .read_mem

.ret:

        popad

        mov     eax, [r_count]

        ret

endp

align 4

proc write_process_memory

;Input:

;  eax - process slot

;  ecx - buffer address

;  edx - buffer size

;  esi - start address in other process

;Output:

;  eax - number of bytes written

       locals

         slot   dd ?

         buff   dd ?

         w_count    dd ?

         offset dd ?

         tmp_w_cnt  dd ?

       endl

        mov     [slot], eax

        mov     [buff], ecx

        and     [w_count], 0

        mov     [tmp_w_cnt], edx

        mov     [offset], esi

        pushad

.read_mem:

        mov     edx, [offset]

        mov     ebx, [tmp_w_cnt]

        mov     ecx, 0x400000

        and     edx, 0x3FFFFF

        sub     ecx, edx

        cmp     ecx, ebx

        jbe     @f

        mov     ecx, ebx

@@:

        cmp     ecx, 0x8000

        jna     @F

        mov     ecx, 0x8000

@@:

        mov     ebx, [offset]

        push    ecx

        stdcall map_memEx, [proc_mem_map], \

                [slot], ebx, ecx, PG_SWR

        pop     ecx

        mov     edi, [offset]

        and     edi, 0xfff

        sub     eax, edi

        jbe     .ret

        cmp     ecx, eax

        jbe     @f

        mov     ecx, eax

        mov     [tmp_w_cnt], eax

@@:

        add     edi, [proc_mem_map]

        mov     esi, [buff]

        mov     edx, ecx

        rep movsb

        add     [w_count], edx

        add     [offset], edx

        sub     [tmp_w_cnt], edx

        jnz     .read_mem

.ret:

        popad

        mov     eax, [w_count]

        ret

endp

;ebx = 1 - kernel thread

;ecx=thread entry point

;edx=thread stack pointer

;creation flags  0x01 - debugged

;                0x02 - kernel

align 4

proc new_sys_threads

       locals

         slot          dd ?

         flags         dd ?

         app_cmdline   dd ? ;0x00

         app_path      dd ? ;0x04

         app_eip       dd ? ;0x08

         app_esp       dd ? ;0x0C

         app_mem       dd ? ;0x10

       endl

        shl     ebx, 1

        mov     [flags], ebx

        xor     eax, eax

        mov     [app_eip], ecx

        mov     [app_cmdline], eax

        mov     [app_esp], edx

        mov     [app_path], eax

        call    lock_application_table

        call    alloc_thread_slot

        test    eax, eax

        jz      .failed

        mov     [slot], eax

        mov     esi, [current_slot]

        mov     ebx, esi      ;ebx=esi - pointer to extended information about current thread

        mov     edi, eax

        shl     edi, 8

        add     edi, SLOT_BASE

        mov     edx, edi      ;edx=edi - pointer to extended infomation about new thread

        mov     ecx, 256/4

        xor     eax, eax

        cld

        rep stosd             ;clean extended information about new thread

        mov     esi, ebx

        mov     edi, edx

        mov     ecx, 11

        rep movsb             ;copy process name

        mov     eax, [ebx+APPDATA.tls_base]

        test    eax, eax

        jz      @F

        push    edx

        stdcall user_alloc, 4096

        pop     edx

        test    eax, eax

        jz      .failed1;eax=0

@@:

        mov     [edx+APPDATA.tls_base], eax

        mov     eax, [ebx+APPDATA.process]

        mov     [edx+APPDATA.process], eax

        lea     ebx, [edx+APPDATA.list]

        lea     ecx, [eax+PROC.thr_list]

        list_add_tail ebx, ecx               ;add thread to process child's list

        lea     eax, [app_cmdline]

        stdcall set_app_params , [slot], eax, [flags]

        mov     eax, [process_number]           ;set result

        call    unlock_application_table

        ret

.failed:

        xor     eax, eax

.failed1:

        call    unlock_application_table

        dec     eax     ;-1

        ret

endp

proc map_process_image stdcall, img_size:dword, file_base:dword, file_size:dword

        mov     edx, [img_size]

        mov     esi, [file_base]

        mov     ecx, [file_size]

        add     edx, 4095

        add     ecx, 4095

        shr     edx, 12        ; total pages

        shr     ecx, 12        ; image pages

        mov     edi, page_tabs

        shr     esi, 10

        add     esi, edi

.map_image:

        lodsd

        and     eax, -4096

        or      eax, PG_UWR

        stosd

        dec     edx

        loop    .map_image

        test    edx, edx

        jz      .done

.map_bss:

        call    alloc_page

        test    eax, eax

        jz      .fail

        or      eax, PG_UWR

        stosd

        dec     edx

        jnz     .map_bss

        mov     edi, [file_size]

        mov     ecx, [img_size]

        add     edi, 4095

        and     edi, -4096

        add     ecx, 4095

        and     ecx, -4096

        sub     ecx, edi

        shr     ecx, 2

        xor     eax, eax

        rep stosd

.done:

.fail:

        ret

endp

align 4

common_app_entry:

        mov     ebp, [current_slot]

        mov     ebp, [ebp+APPDATA.exec_params]

        test    ebp, ebp

        jz      .exit

        stdcall map_process_image, [ebp+APP_HDR._emem],\

                [ebp+APP_HDR.img_base], [ebp+APP_HDR.img_size]

        mov     esi, [ebp+APP_HDR.path_string]

        mov     edi, [ebp+APP_HDR.path]

        push    esi

        test    edi, edi

        jz      @f

        mov     ecx, [ebp+APP_HDR.filename_size]

        rep movsb

        mov     byte [edi], 0

@@:

        call    kernel_free

        mov     edi, [ebp+APP_HDR.cmdline]

        test    edi, edi

        jz      .check_tls_header

        lea     esi, [ebp+sizeof.APP_HDR]

        mov     ecx, [ebp+APP_HDR.cmdline_size]

        cmp     ecx, 256

        jb      .copy_cmdline

        mov     edi, [ebp+APP_HDR._emem]

        add     edi, 4095

        and     edi, -4096

        sub     edi, ecx

        dec     edi

        cmp     word [6], '00'

        jne     @f

        mov     [APP_HEADER_00_.i_param], edi

        jmp     .copy_cmdline

@@:

        mov     [APP_HEADER_01_.i_param], edi

.copy_cmdline:

        rep movsb

        mov     byte [edi], 0

.check_tls_header:

        cmp     word [6], '02'

        jne     .cleanup

        call    init_heap

        stdcall user_alloc, 4096

        mov     edx, [current_slot]

        mov     [edx+APPDATA.tls_base], eax

        mov     [tls_data_l+2], ax

        shr     eax, 16

        mov     [tls_data_l+4], al

        mov     [tls_data_l+7], ah

        mov     dx, app_tls

        mov     fs, dx

.cleanup:

        stdcall free_kernel_space, [ebp+APP_HDR.img_base]

        stdcall kernel_free, ebp

        mov     ebx, [current_slot]

        cmp     [ebx+APPDATA.debugger_slot], 0

        je      .exit

        mov     eax, [TASK_BASE]

        mov     [eax+TASKDATA.state], 1

        call    change_task

.exit:

        popad

        iretd

EFL_IF      equ 0x0200

EFL_IOPL1   equ 0x1000

EFL_IOPL2   equ 0x2000

EFL_IOPL3   equ 0x3000

align 4

proc set_app_params stdcall,slot:dword, params:dword, flags:dword

       locals

         pl0_stack dd ?

       endl

        stdcall kernel_alloc, RING0_STACK_SIZE+512

        mov     [pl0_stack], eax

        lea     edi, [eax+RING0_STACK_SIZE]

        mov     eax, [slot]

        mov     ebx, eax

        shl     eax, 8

        mov     [eax+SLOT_BASE+APPDATA.fpu_state], edi

        mov     [eax+SLOT_BASE+APPDATA.exc_handler], 0

        mov     [eax+SLOT_BASE+APPDATA.except_mask], 0

        mov     [eax+SLOT_BASE+APPDATA.terminate_protection], 80000001h

;set default io permission map

        mov     ecx, [SLOT_BASE+256+APPDATA.io_map]

        mov     [eax+SLOT_BASE+APPDATA.io_map], ecx

        mov     ecx, [SLOT_BASE+256+APPDATA.io_map+4]

        mov     [eax+SLOT_BASE+APPDATA.io_map+4], ecx

        mov     esi, fpu_data

        mov     ecx, 512/4

        rep movsd

        cmp     ebx, [TASK_COUNT]

        jle     .noinc

        inc     dword [TASK_COUNT]     ;update number of processes

.noinc:

        shl     ebx, 8

        lea     edx, [ebx+SLOT_BASE+APP_EV_OFFSET]

        mov     [SLOT_BASE+APPDATA.fd_ev+ebx], edx

        mov     [SLOT_BASE+APPDATA.bk_ev+ebx], edx

        add     edx, APP_OBJ_OFFSET-APP_EV_OFFSET

        mov     [SLOT_BASE+APPDATA.fd_obj+ebx], edx

        mov     [SLOT_BASE+APPDATA.bk_obj+ebx], edx

        mov     ecx, [def_cursor]

        mov     [SLOT_BASE+APPDATA.cursor+ebx], ecx

        mov     eax, [pl0_stack]

        mov     [SLOT_BASE+APPDATA.pl0_stack+ebx], eax

        add     eax, RING0_STACK_SIZE

        mov     [SLOT_BASE+APPDATA.saved_esp0+ebx], eax

        push    ebx

        stdcall kernel_alloc, maxPathLength

        pop     ebx

        mov     esi, [current_slot]

        mov     esi, [esi+APPDATA.cur_dir]

        mov     ecx, maxPathLength/4

        mov     edi, eax

        mov     [ebx+SLOT_BASE+APPDATA.cur_dir], eax

        rep movsd

        shr     ebx, 3

        mov     dword [CURRENT_TASK+ebx+0x10], 0

        mov     ebx, [slot]

        mov     eax, ebx

        shl     ebx, 5

        lea     ecx, [draw_data+ebx];ecx - pointer to draw data

; set window state to 'normal' (non-minimized/maximized/rolled-up) state

        mov     [ebx+window_data+WDATA.fl_wstate], WSTATE_NORMAL

        mov     [ebx+window_data+WDATA.fl_redraw], 1

        add     ebx, CURRENT_TASK     ;ebx - pointer to information about process

        mov     [ebx+TASKDATA.wnd_number], al;set window number on screen = process slot

        mov     [ebx+TASKDATA.event_mask], dword 1+2+4;set default event flags (see 40 function)

        inc     dword [process_number]

        mov     eax, [process_number]

        mov     [ebx+4], eax    ;set PID

;set draw data to full screen

        xor     eax, eax

        mov     [ecx+0], dword eax

        mov     [ecx+4], dword eax

        mov     eax, [screen_workarea.right]

        mov     [ecx+8], eax

        mov     eax, [screen_workarea.bottom]

        mov     [ecx+12], eax

        mov     ebx, [pl0_stack]

        mov     esi, [params]

        lea     ecx, [ebx+REG_EIP]

        xor     eax, eax

        mov     [ebx+REG_RET], dword common_app_entry

        mov     [ebx+REG_EDI], eax

        mov     [ebx+REG_ESI], eax

        mov     [ebx+REG_EBP], eax

        mov     [ebx+REG_ESP], ecx;ebx+REG_EIP

        mov     [ebx+REG_EBX], eax

        mov     [ebx+REG_EDX], eax

        mov     [ebx+REG_ECX], eax

        mov     [ebx+REG_EAX], eax

        mov     eax, [esi+APP_HDR.eip]

        mov     [ebx+REG_EIP], eax

        mov     [ebx+REG_CS], dword app_code

        mov     ecx, USER_PRIORITY

        test    byte [flags], 2

        jz      @F

        mov     [ebx+REG_CS], dword os_code ; kernel thread

        mov     ecx, MAX_PRIORITY

@@:

        mov     [ebx+REG_EFLAGS], dword EFL_IOPL1+EFL_IF

        mov     eax, [esi+APP_HDR.esp]

        mov     [ebx+REG_APP_ESP], eax

        mov     [ebx+REG_SS], dword app_data

        lea     edx, [ebx+REG_RET]

        mov     ebx, [slot]

        shl     ebx, 5

        mov     [ebx*8+SLOT_BASE+APPDATA.saved_esp], edx

        xor     edx, edx; process state - running

; set if debuggee

        test    byte [flags], 1

        jz      .no_debug

        mov     eax, [CURRENT_TASK]

        mov     [SLOT_BASE+ebx*8+APPDATA.debugger_slot], eax

.no_debug:

        mov     [CURRENT_TASK+ebx+TASKDATA.state], dl

        lea     edx, [SLOT_BASE+ebx*8]

        call    scheduler_add_thread

        ret

endp

align 4

get_stack_base:

        mov     eax, [current_slot]

        mov     eax, [eax+APPDATA.pl0_stack]

        ret

include "debug.inc"