forked from KolibriOS/kolibrios
1322 lines
37 KiB
PHP
1322 lines
37 KiB
PHP
if ~defined newprocess_inc
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newprocess_inc_fix:
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newprocess_inc fix newprocess_inc_fix
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include "mem.inc"
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include "memmanag.inc"
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;Working with new types of processes.
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;;Author: Khalyavin Andrey halyavin@land.ru
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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iglobal
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new_process_loading db 'K : New Process - loading',13,10,0
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new_process_running db 'K : New Process - done',13,10,0
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start_not_enough_memory db 'K : New Process - not enough memory',13,10,0
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endg
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;-----------------------------------------------------------------------------
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find_new_process_place:
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;input:
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; none
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;result:
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; eax=[new_process_place]<>0 - ok
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; 0 - failed.
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;This function find least empty slot.
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;It doesn't increase [0x3004]!
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mov eax,0x3000+second_base_address
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push ebx
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mov ebx,[0x3004]
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inc ebx
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shl ebx,5
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add ebx,eax ;ebx - address of process information for (last+1) slot
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.newprocessplace:
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;eax = address of process information for current slot
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cmp eax,ebx
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jz .endnewprocessplace ;empty slot after high boundary
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add eax,0x20
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cmp word [eax+0xa],9 ;check process state, 9 means that process slot is empty
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jnz .newprocessplace
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.endnewprocessplace:
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mov ebx,eax
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sub eax,0x3000+second_base_address
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shr eax,5 ;calculate slot index
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cmp eax,256
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jge .failed ;it should be <256
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mov word [ebx+0xa],9 ;set process state to 9 (for slot after hight boundary)
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mov [new_process_place],eax ;save process slot
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pop ebx
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ret
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.failed:
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xor eax,eax
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pop ebx
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ret
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;-----------------------------------------------------------------------------
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new_start_application_floppy:
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;input:
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; eax - pointer to filename
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; ebx - parameters to pass
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;result:
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; eax - pid of new process
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; or 0 if call fails.
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pushad
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mov esi,new_process_loading
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call sys_msg_board_str ;write to debug board
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;wait application_table_status mutex
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.table_status:
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cli
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cmp [application_table_status],0
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jz .stf
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sti
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call change_task
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jmp .table_status
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.stf:
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call set_application_table_status
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;we can change system tables now
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push edi
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push ebx
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push eax
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call find_new_process_place ;find empty process slot
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sti
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test eax,eax
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jz .failed
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mov edi,eax
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shl edi,8
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add edi,0x80000
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mov ecx,256/4
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xor eax,eax
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cld
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rep stosd ;clean extended information about process
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;set new process name
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mov eax,[esp+8]
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.find_last_byte:
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cmp byte [eax],0
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jz .find_last_byte_end
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inc eax
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jmp .find_last_byte
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.find_last_byte_end:
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sub eax,11 ;last 11 bytes = application name
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; mov eax,[esp] ;eax - pointer to file name
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mov ebx,[new_process_place]
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shl ebx,8
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add ebx,0x80000
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mov ecx,11
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call memmove
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;read header of file
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mov eax,[esp]
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mov ebx,1 ;index of first block
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mov ecx,2 ;number of blocks
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mov edx,0x90000 ;temp area
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mov esi,12 ;file name length
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mov edi,[esp+8]
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; cli
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call floppy_fileread ;read file from FD
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; sti
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cmp eax,0
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jne .cleanfailed
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;check MENUET signature
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cmp [0x90000],dword 'MENU'
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jnz .cleanfailed
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cmp [0x90004],word 'ET'
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jnz .cleanfailed
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call get_app_params ;parse header fields
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cmp esi,0
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jz .cleanfailed
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mov eax,[new_process_place]
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call create_app_cr3_table ;create page directory for new process
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test eax,eax
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jz .cleanfailed_mem
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call MEM_Get_Linear_Address ;calculate linear address of it
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mov ebx,std_application_base_address
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mov ecx,[app_mem]
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add ecx,4095
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shr ecx,12
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mov edx,eax
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call mem_alloc_specified_region ;allocate memory for application
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test eax,eax
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jz .cleanfailed_mem
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mov eax,[edx+(std_application_base_address shr 20)]
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and eax,not (4096-1) ;eax - physical address of first (for application memory) page table
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call MEM_Get_Linear_Address
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mov edx,eax
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;read file
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mov ebx,1
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mov esi,12 ;length of file name
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.loop1:
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;edx = linear address of current page table entry
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;ebx = index of current block in file
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push edx
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mov eax,[edx]
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and eax,not (4096-1)
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call MEM_Get_Linear_Address
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mov edx,eax ;read file block to current page
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mov eax,[esp+4] ;restore pointer to file name
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mov ecx,8 ;number of blocks read
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push ebx
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mov edi,[esp+16]
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; cli
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call floppy_fileread
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;ebx=file size
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; sti
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pop ecx
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shr ebx,9
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cmp ecx,ebx
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jg .endloop1 ;if end of file?
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mov ebx,ecx
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test eax,eax
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jnz .endloop1 ;check io errors
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pop edx
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add ebx,8 ;go to next page
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add edx,4
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jmp .loop1
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.endloop1:
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add esp,8+4 ;pop linear address of page table entry and pointer to file name
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call new_start_application_fl.add_app_parameters
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mov [esp+28],eax
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popad
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ret
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.cleanfailed_mem:
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mov esi,start_not_enough_memory
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call sys_msg_board_str
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.cleanfailed: ;clean process name
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mov edi,[new_process_place]
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shl edi,8
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add edi,0x80000
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mov ecx,11
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mov eax,' '
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cld
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rep stosb
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.failed:
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add esp,8+4
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mov [application_table_status],0
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popad
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sti
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mov eax,-1
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ret
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;-----------------------------------------------------------------------------
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new_start_application_fl:
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;input:
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; eax - pointer to filename
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; ebx - parameters to pass
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;result:
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; eax - pid of new process
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; or 0 if call fails.
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pushad
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mov esi,new_process_loading
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call sys_msg_board_str ;write to debug board
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;wait application_table_status mutex
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.table_status:
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cli
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cmp [application_table_status],0
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jz .stf
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sti
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call change_task
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jmp .table_status
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.stf:
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call set_application_table_status
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;we can change system tables now
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push ebx
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push eax
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call find_new_process_place ;find empty process slot
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sti
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test eax,eax
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jz .failed
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mov edi,eax
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shl edi,8
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add edi,0x80000
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mov ecx,256/4
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xor eax,eax
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cld
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rep stosd ;clean extended information about process
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;set new process name
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mov eax,[esp] ;eax - pointer to file name
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mov ebx,[new_process_place]
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shl ebx,8
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add ebx,0x80000
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mov ecx,11
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call memmove
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;read header of file
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mov ebx,1 ;index of first block
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mov ecx,2 ;number of blocks
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mov edx,0x90000 ;temp area
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mov esi,12 ;file name length
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cli
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call fileread ;read file from RD
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sti
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cmp eax,0
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jne .cleanfailed
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;check MENUET signature
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cmp [0x90000],dword 'MENU'
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jnz .cleanfailed
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cmp [0x90004],word 'ET'
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jnz .cleanfailed
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call get_app_params ;parse header fields
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cmp esi,0
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jz .failed
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mov eax,[new_process_place]
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call create_app_cr3_table ;create page directory for new process
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test eax,eax
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jz .cleanfailed_mem
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call MEM_Get_Linear_Address ;calculate linear address of it
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mov ebx,std_application_base_address
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mov ecx,[app_mem]
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add ecx,4095
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shr ecx,12
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mov edx,eax
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call mem_alloc_specified_region ;allocate memory for application
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test eax,eax
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jz .cleanfailed_mem
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mov eax,[edx+(std_application_base_address shr 20)]
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and eax,not (4096-1) ;eax - physical address of first (for application memory) page table
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call MEM_Get_Linear_Address
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mov edx,eax
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;read file
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mov ebx,1
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mov esi,12 ;length of file name
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.loop1:
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;edx = linear address of current page table entry
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;ebx = index of current block in file
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push edx
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mov eax,[edx]
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and eax,not (4096-1)
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call MEM_Get_Linear_Address
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mov edx,eax ;read file block to current page
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mov eax,[esp+4] ;restore pointer to file name
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mov ecx,8 ;number of blocks read
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push ebx
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cli
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call fileread
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;ebx=file size
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sti
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pop ecx
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shr ebx,9
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cmp ecx,ebx
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jg .endloop1 ;if end of file?
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mov ebx,ecx
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test eax,eax
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jnz .endloop1 ;check io errors
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pop edx
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add ebx,8 ;go to next page
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add edx,4
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jmp .loop1
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.endloop1:
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add esp,8 ;pop linear address of page table entry and pointer to file name
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call .add_app_parameters
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mov [esp+28],eax
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popad
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ret
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.cleanfailed_mem:
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mov esi,start_not_enough_memory
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call sys_msg_board_str
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.cleanfailed: ;clean process name
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mov edi,[new_process_place]
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shl edi,8
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add edi,0x80000
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mov ecx,11
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mov eax,' '
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cld
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rep stosb
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.failed:
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add esp,8
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mov [application_table_status],0
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popad
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sti
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mov eax,-1
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ret
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.add_app_parameters:
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;input:
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; [esp] - pointer to parameters
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; [esp+4]-[esp+36] pushad registers.
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;result
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; eax - pid of new process
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; or zero if failed
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cli
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mov ebx,[new_process_place]
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cmp ebx,[0x3004]
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jle .noinc
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inc dword [0x3004] ;update number of processes
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.noinc:
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; mov ebx,[new_process_place]
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;set 0x8c field of extended information about process
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;(size of application memory)
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shl ebx,8
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mov eax,[app_mem]
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mov [second_base_address+0x80000+0x8c+ebx],eax
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;set 0x10 field of information about process
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;(application base address)
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; mov ebx,[new_process_place]
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; shl ebx,5
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shr ebx,3
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mov dword [second_base_address+0x3000+ebx+0x10],std_application_base_address
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;add command line parameters
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.add_command_line:
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mov edx,[app_i_param]
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test edx,edx
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jz .no_command_line ;application don't need parameters
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mov eax,[esp+4]
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test eax,eax
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jz .no_command_line ;no parameters specified
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;calculate parameter length
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mov esi,eax
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xor ecx,ecx
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.command_line_len:
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cmp byte [esi],0
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jz .command_line_len_end
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inc esi
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inc ecx
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cmp ecx,256
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jl .command_line_len
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.command_line_len_end:
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;ecx - parameter length
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;edx - address of parameters in new process address space
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mov ebx,eax ;ebx - address of parameters in our address space
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mov eax,[new_process_place]
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call write_process_memory ;copy parameters to new process address space
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.no_command_line:
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mov ebx,[new_process_place]
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mov eax,ebx
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shl ebx,5
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add ebx,0x3000 ;ebx - pointer to information about process
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mov [ebx+0xe],al ;set window number on screen = process slot
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mov [ebx],dword 1+2+4 ;set default event flags (see 40 function)
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inc dword [process_number]
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mov eax,[process_number]
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mov [ebx+4],eax ;set PID
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mov ecx,ebx
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add ecx,draw_data-0x3000 ;ecx - pointer to draw data
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;set draw data to full screen
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mov [ecx+0],dword 0
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mov [ecx+4],dword 0
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mov eax,[0xfe00]
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mov [ecx+8],eax
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mov eax,[0xfe04]
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mov [ecx+12],eax
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;set cr3 register in TSS of application
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mov ecx,[new_process_place]
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shl ecx,8
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mov eax,[0x800B8+ecx]
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add eax,8+16 ;add flags
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mov [l.cr3],eax
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;write cr3 in TSS of System Call Handler
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mov ecx,[new_process_place]
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shl ecx,7
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mov [0x298000+ecx+l.cr3-tss_sceleton],eax ;write directy to TSS
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mov eax,[app_start]
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mov [l.eip],eax ;set eip in TSS
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mov eax,[app_esp]
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mov [l.esp],eax ;set stack in TSS
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;gdt
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mov ebx,[new_process_place]
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shl ebx,3
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mov ax,app_code ;ax - selector of code segment
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add ax,bx
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mov [l.cs],ax
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mov ax,app_data
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add ax,bx ;ax - selector of data segment
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mov [l.ss],ax
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mov [l.ds],ax
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mov [l.es],ax
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mov [l.fs],ax
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mov ax,graph_data ;ax - selector of graphic segment
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mov [l.gs],ax
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mov [l.io],word 128
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mov [l.eflags],dword 0x11202
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mov [l.ss0],os_data
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mov [l.esp0],0x55000
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; mov [l.esp1],0x56000
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; mov [l.esp2],0x57000
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;copy tss to it place
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mov eax,tss_sceleton
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mov ebx,[new_process_place]
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imul ebx,tss_step
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add ebx,tss_data ;ebx - address of application TSS
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mov ecx,120
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call memmove
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;Add IO access table - bit array of permitted ports
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or eax,-1
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mov edi,[new_process_place]
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imul edi,tss_step
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add edi,tss_data+128
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mov ecx,2048
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cld
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rep stosd ;full access to 2048*8=16384 ports
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mov ecx,ebx ;ecx - address of application TSS
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mov edi,[new_process_place]
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shl edi,3
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;set TSS descriptor
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mov [edi+gdts+tss0+0],word tss_step ;limit (size)
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mov [edi+gdts+tss0+2],cx ;part of offset
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mov eax,ecx
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shr eax,16
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mov [edi+gdts+tss0+4],al ;part of offset
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mov [edi+gdts+tss0+7],ah ;part of offset
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mov [edi+gdts+tss0+5],word 01010000b*256+11101001b ;system flags
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;set code and data segments
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mov eax,[new_process_place]
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shl eax,3
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;set base address of code segment
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mov word [eax+gdts+app_code-3+2],0
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mov byte [eax+gdts+app_code-3+4],0
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mov byte [eax+gdts+app_code-3+7],std_application_base_address shr 24
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;set limit of code segment
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; mov ebx,[app_mem]
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; add ebx,4095
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; shr ebx,12
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mov ebx,(0x80000000-std_application_base_address) shr 12
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mov [eax+gdts+app_code-3+0],bx
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mov [eax+gdts+app_code-3+5],word 11010000b*256+11111010b+256*((0x80000000-std_application_base_address) shr 28)
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;set base address of data segment
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mov word [eax+gdts+app_data-3+2],0
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mov byte [eax+gdts+app_data-3+4],0
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mov byte [eax+gdts+app_data-3+7],std_application_base_address shr 24
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;set limit of data segment
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mov [eax+gdts+app_data-3+0],bx
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mov [eax+gdts+app_data-3+5],word 11010000b*256+11110010b+256*((0x80000000-std_application_base_address) shr 28)
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;flush keyboard and buttons queue
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mov [0xf400],byte 0
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mov [0xf500],byte 0
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mov edi,[new_process_place]
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shl edi,5
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add edi,window_data
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mov ebx,[new_process_place]
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movzx esi,word [0xC000+ebx*2]
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lea esi,[0xC400+esi*2]
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call windowactivate ;gui initialization
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mov ebx,[new_process_place]
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shl ebx,5
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mov [0x3000+ebx+0xa],byte 0 ;set process state - running
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|
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mov esi,new_process_running
|
|
call sys_msg_board_str ;output information about succefull startup
|
|
|
|
; add esp,4 ;pop pointer to parameters
|
|
; popad
|
|
mov eax,[process_number] ;set result
|
|
mov [application_table_status],0 ;unlock application_table_status mutex
|
|
sti
|
|
ret 4
|
|
;-----------------------------------------------------------------------------
|
|
new_sys_threads:
|
|
;eax=1 - create thread
|
|
; ebx=thread start
|
|
; ecx=thread stack value
|
|
;result:
|
|
; eax=pid
|
|
pushad
|
|
|
|
cmp eax,1
|
|
jnz .ret ;other subfunctions
|
|
mov esi,new_process_loading
|
|
call sys_msg_board_str
|
|
;lock application_table_status mutex
|
|
.table_status:
|
|
cli
|
|
cmp [application_table_status],0
|
|
je .stf
|
|
sti
|
|
call change_task
|
|
jmp .table_status
|
|
.stf:
|
|
call set_application_table_status
|
|
;find free process slot
|
|
|
|
call find_new_process_place
|
|
test eax,eax
|
|
jz .failed
|
|
|
|
;set parameters for thread
|
|
xor eax,eax
|
|
mov [app_i_param],eax
|
|
mov [app_i_icon],eax
|
|
mov [app_start],ebx
|
|
mov [app_esp],ecx
|
|
|
|
mov esi,[0x3000]
|
|
shl esi,8
|
|
add esi,0x80000
|
|
mov ebx,esi ;ebx=esi - pointer to extended information about current thread
|
|
|
|
mov edi,[new_process_place]
|
|
shl edi,8
|
|
add edi,0x80000
|
|
mov edx,edi ;edx=edi - pointer to extended infomation about new thread
|
|
mov ecx,256/4
|
|
rep stosd ;clean extended information about new thread
|
|
mov edi,edx
|
|
mov ecx,11
|
|
rep movsb ;copy process name
|
|
mov eax,[ebx+0x8c]
|
|
mov [app_mem],eax ;set memory size
|
|
mov eax,[ebx+0xb8]
|
|
mov [edx+0xb8],eax ;copy page directory
|
|
; mov eax,[new_process_place]
|
|
; mov ebx,[0x3000]
|
|
; call addreference_app_cr3_table
|
|
|
|
push 0 ;no parameters
|
|
call new_start_application_fl.add_app_parameters ;start thread
|
|
mov [esp+28],eax
|
|
popad
|
|
ret
|
|
|
|
.failed:
|
|
sti
|
|
popad
|
|
mov eax,-1
|
|
ret
|
|
.ret:
|
|
popad
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
new_mem_resize:
|
|
;input:
|
|
; ebx - new size
|
|
;result:
|
|
; [esp+36]:=0 - normal
|
|
; [esp+36]:=1 - error
|
|
;This function set new application memory size.
|
|
mov esi,ebx ;save new size
|
|
add ebx,4095
|
|
and ebx,not (4096-1) ;round up size
|
|
mov ecx,[0x3000]
|
|
shl ecx,8
|
|
mov edx,[0x8008C+ecx]
|
|
add edx,4095
|
|
and edx,not (4096-1) ;old size
|
|
mov eax,[0x800B8+ecx]
|
|
call MEM_Get_Linear_Address
|
|
;eax - linear address of page directory
|
|
call MEM_Heap_Lock ;guarantee that two threads willn't
|
|
;change memory size simultaneously
|
|
cmp ebx,edx
|
|
; mov esi,ebx ;save new size
|
|
jg .expand
|
|
|
|
.free:
|
|
sub edx,ebx
|
|
jz .unlock ;do nothing
|
|
mov ecx,edx
|
|
shr ecx,12
|
|
add ebx,std_application_base_address
|
|
call mem_free_specified_region ;free unnecessary pages
|
|
jmp .unlock
|
|
|
|
.expand:
|
|
sub ebx,edx
|
|
mov ecx,ebx
|
|
shr ecx,12
|
|
mov ebx,edx
|
|
add ebx,std_application_base_address
|
|
call mem_alloc_specified_region ;alloc necessary pages
|
|
test eax,eax
|
|
jz .failed ;not enough memory
|
|
|
|
.unlock:
|
|
mov ebx,esi
|
|
mov eax,[0x3000]
|
|
shl eax,8
|
|
mov [eax+0x8008c],ebx ;write new memory size
|
|
;search threads and update
|
|
;application memory size infomation
|
|
mov ecx,[eax+0x800b8]
|
|
mov eax,2
|
|
|
|
.search_threads:
|
|
;eax = current slot
|
|
;ebx = new memory size
|
|
;ecx = page directory
|
|
cmp eax,[0x3004]
|
|
jg .search_threads_end
|
|
mov edx,eax
|
|
shl edx,5
|
|
cmp word [0x3000+edx+0xa],9 ;if slot empty?
|
|
jz .search_threads_next
|
|
shl edx,3
|
|
cmp [edx+0x800b8],ecx ;if it is our thread?
|
|
jnz .search_threads_next
|
|
mov [edx+0x8008c],ebx ;update memory size
|
|
.search_threads_next:
|
|
inc eax
|
|
jmp .search_threads
|
|
.search_threads_end:
|
|
|
|
call MEM_Heap_UnLock
|
|
mov dword [esp+36],0
|
|
ret
|
|
|
|
.failed:
|
|
call MEM_Heap_UnLock
|
|
mov dword [esp+36],1
|
|
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,[0x3004]
|
|
shl ebx,5
|
|
mov ecx,2*32
|
|
|
|
.loop:
|
|
;ecx=offset of current process info entry
|
|
;ebx=maximum permitted offset
|
|
cmp byte [second_base_address+0x3000+ecx+0xa],9
|
|
jz .endloop ;skip empty slots
|
|
cmp [second_base_address+0x3000+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
|
|
;-----------------------------------------------------------------------------
|
|
is_new_process:
|
|
;Input:
|
|
; eax - process slot
|
|
;Output:
|
|
; eax=1 - it is new process
|
|
; eax=0 - it is old process
|
|
; shl eax,5
|
|
; mov eax,[second_base_address+0x3000+eax+0x10]
|
|
; cmp eax,std_application_base_address ;check base address of application
|
|
; jz .new_process
|
|
; xor eax,eax
|
|
; ret
|
|
|
|
;.new_process:
|
|
mov eax,1
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
write_process_memory:
|
|
;Input:
|
|
; eax - process slot
|
|
; ebx - buffer address
|
|
; ecx - buffer size
|
|
; edx - start address in other process
|
|
;Output:
|
|
; eax - number of bytes written
|
|
pushad
|
|
shl eax,8
|
|
mov eax,[0x80000+eax+0xB8]
|
|
call MEM_Get_Linear_Address
|
|
mov ebp,eax
|
|
;ebp=linear address of page directory of other process.
|
|
add edx,std_application_base_address ;convert to linear address
|
|
test ecx,ecx
|
|
jle .ret
|
|
|
|
.write_loop:
|
|
;ebx = current buffer address
|
|
;ecx>0 = current size
|
|
;edx = current address in other process
|
|
;ebp = linear address of page directory
|
|
|
|
call MEM_Heap_Lock ;cli
|
|
mov esi,edx
|
|
shr esi,22
|
|
mov eax,[ebp+4*esi] ;find page directory entry
|
|
and eax,not (4096-1) ;clear flags
|
|
test eax,eax
|
|
jz .page_not_found
|
|
call MEM_Get_Linear_Address ;calculate linear address of page table
|
|
test eax,eax
|
|
jz .page_not_found
|
|
mov esi,edx
|
|
shr esi,12
|
|
and esi,1023
|
|
mov eax,[eax+4*esi] ;find page table entry
|
|
and eax,not (4096-1)
|
|
test eax,eax
|
|
jz .page_not_found
|
|
call MEM_Get_Linear_Address ;calculate linear address of page
|
|
test eax,eax
|
|
jz .page_not_found
|
|
mov edi,eax
|
|
call MEM_Add_Reference_Linear;guarantee that page willn't disappear
|
|
call MEM_Heap_UnLock ;sti
|
|
|
|
mov esi,edx
|
|
and esi,4095
|
|
add edi,esi ;add offset in page
|
|
;edi = linear address corresponding edx in other process
|
|
sub esi,4096
|
|
neg esi ;esi - number of remaining bytes in page
|
|
cmp esi,ecx
|
|
jl .min_ecx
|
|
mov esi,ecx
|
|
.min_ecx: ;esi=min(ecx,esi) - number of bytes to write
|
|
sub ecx,esi
|
|
push ecx
|
|
mov ecx,esi ;ecx - number of bytes to write
|
|
mov esi,ebx ;esi - source, edi - destination
|
|
add edx,ecx ;move pointer in address space of other process
|
|
push edi
|
|
|
|
;move ecx bytes
|
|
test ecx,3
|
|
jnz .not_aligned
|
|
shr ecx,2
|
|
rep movsd
|
|
jmp .next_iter
|
|
.not_aligned:
|
|
rep movsb
|
|
.next_iter:
|
|
|
|
pop eax
|
|
and eax,not (4096-1) ;eax - linear address of current page
|
|
call MEM_Free_Page_Linear ;free reference
|
|
mov ebx,esi ;new pointer to buffer - movsb automaticaly advance it.
|
|
pop ecx ;restore number of remaining bytes
|
|
test ecx,ecx
|
|
jnz .write_loop
|
|
.ret:
|
|
popad
|
|
mov eax,ecx
|
|
ret
|
|
|
|
.page_not_found:
|
|
call MEM_Heap_UnLock ;error has appeared in critical region
|
|
sub ecx,[esp+24] ;[esp+24]<-->ecx
|
|
neg ecx ;ecx=number_of_written_bytes
|
|
mov [esp+28],ecx ;[esp+28]<-->eax
|
|
popad
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
syscall_test:
|
|
;for testing memory manager from applications.
|
|
mov edx,ecx
|
|
mov ecx,ebx
|
|
call trans_address
|
|
mov ebx,eax
|
|
mov eax,[0x3000]
|
|
call read_process_memory
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
read_process_memory:
|
|
;Input:
|
|
; eax - process slot
|
|
; ebx - buffer address
|
|
; ecx - buffer size
|
|
; edx - start address in other process
|
|
;Output:
|
|
; eax - number of bytes read.
|
|
pushad
|
|
shl eax,8
|
|
mov eax,[0x80000+eax+0xB8]
|
|
call MEM_Get_Linear_Address
|
|
mov ebp,eax
|
|
add edx,std_application_base_address
|
|
.read_loop:
|
|
;ebx = current buffer address
|
|
;ecx>0 = current size
|
|
;edx = current address in other process
|
|
;ebp = linear address of page directory
|
|
|
|
call MEM_Heap_Lock ;cli
|
|
mov esi,edx
|
|
shr esi,22
|
|
mov eax,[ebp+4*esi] ;find page directory entry
|
|
and eax,not (4096-1)
|
|
test eax,eax
|
|
jz .page_not_found
|
|
call MEM_Get_Linear_Address
|
|
test eax,eax
|
|
jz .page_not_found
|
|
mov esi,edx
|
|
shr esi,12
|
|
and esi,1023
|
|
mov eax,[eax+4*esi] ;find page table entry
|
|
and eax,not (4096-1)
|
|
test eax,eax
|
|
jz .page_not_found
|
|
call MEM_Get_Linear_Address ;calculate linear address of page
|
|
test eax,eax
|
|
jz .page_not_found
|
|
mov esi,eax
|
|
call MEM_Add_Reference_Linear;guarantee that page willn't disappear
|
|
call MEM_Heap_UnLock ;sti
|
|
|
|
mov edi,edx
|
|
and edi,4095
|
|
add esi,edi ;add offset in page
|
|
;esi = linear address corresponding edx in other process
|
|
sub edi,4096
|
|
neg edi
|
|
|
|
;edi=min(edi,ecx) - number of bytes to copy
|
|
cmp edi,ecx
|
|
jl .min_ecx
|
|
mov edi,ecx
|
|
.min_ecx:
|
|
|
|
sub ecx,edi ;update size of remaining bytes
|
|
add edx,edi ;update current pointer in other address space.
|
|
push ecx
|
|
mov ecx,edi ;ecx - number of bytes to read
|
|
mov edi,ebx ;esi - source, edi - destination
|
|
push esi
|
|
;move ecx bytes
|
|
test ecx,3
|
|
jnz .not_aligned
|
|
shr ecx,2
|
|
rep movsd
|
|
jmp .next_iter
|
|
.not_aligned:
|
|
rep movsb
|
|
.next_iter:
|
|
pop eax
|
|
and eax,not (4096-1) ;eax - linear address of current page
|
|
call MEM_Free_Page_Linear ;free reference
|
|
mov ebx,edi ;new pointer to buffer - movsb automaticaly advance it.
|
|
pop ecx ;restore number of remaining bytes
|
|
test ecx,ecx
|
|
jnz .read_loop
|
|
|
|
popad
|
|
mov eax,ecx
|
|
ret
|
|
|
|
.page_not_found:
|
|
call MEM_Heap_UnLock ;error has appeared in critical region
|
|
sub ecx,[esp+24] ;[esp+24]<-->ecx
|
|
neg ecx ;ecx=number_of_read_bytes
|
|
mov [esp+28],ecx ;[esp+28]<-->eax
|
|
popad
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
check_region:
|
|
;input:
|
|
; ebx - start of buffer
|
|
; ecx - size of buffer
|
|
;result:
|
|
; eax = 1 region lays in app memory
|
|
; eax = 0 region don't lays in app memory
|
|
mov eax,[0x3000]
|
|
jmp check_process_region
|
|
;-----------------------------------------------------------------------------
|
|
check_process_region:
|
|
;input:
|
|
; eax - slot
|
|
; ebx - start of buffer
|
|
; ecx - size of buffer
|
|
;result:
|
|
; eax = 1 region lays in app memory
|
|
; eax = 0 region don't lays in app memory
|
|
test ecx,ecx
|
|
jle .ok
|
|
shl eax,5
|
|
cmp word [0x3000+eax+0xa],0
|
|
jnz .failed
|
|
shl eax,3
|
|
mov eax,[0x80000+eax+0xb8]
|
|
test eax,eax
|
|
jz .failed
|
|
call MEM_Get_Linear_Address
|
|
push ebx
|
|
push ecx
|
|
push edx
|
|
mov edx,ebx
|
|
and edx,not (4096-1)
|
|
sub ebx,edx
|
|
add ecx,ebx
|
|
mov ebx,edx
|
|
add ecx,(4096-1)
|
|
and ecx,not (4096-1)
|
|
.loop:
|
|
;eax - linear address of page directory
|
|
;ebx - current page
|
|
;ecx - current size
|
|
mov edx,ebx
|
|
shr edx,22
|
|
mov edx,[eax+4*edx]
|
|
and edx,not (4096-1)
|
|
test edx,edx
|
|
jz .failed1
|
|
push eax
|
|
mov eax,edx
|
|
call MEM_Get_Linear_Address
|
|
mov edx,ebx
|
|
shr edx,12
|
|
and edx,(1024-1)
|
|
mov eax,[eax+4*edx]
|
|
and eax,not (4096-1)
|
|
test eax,eax
|
|
pop eax
|
|
jz .failed1
|
|
add ebx,4096
|
|
sub ecx,4096
|
|
jg .loop
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
.ok:
|
|
mov eax,1
|
|
ret
|
|
|
|
.failed1:
|
|
pop edx
|
|
pop ecx
|
|
pop ebx
|
|
.failed:
|
|
xor eax,eax
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
new_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
|
|
jnz .no_ipc_def
|
|
;set ipc buffer area
|
|
mov edi,[0x3000]
|
|
shl edi,8
|
|
add edi,0x80000
|
|
cli
|
|
mov [edi+0xA0],ebx ;set fields in extended information area
|
|
mov [edi+0xA4],ecx
|
|
sti
|
|
mov [esp+36],dword 0 ;success
|
|
ret
|
|
|
|
.no_ipc_def:
|
|
cmp eax,2
|
|
jnz .no_ipc_send
|
|
;send message
|
|
cli
|
|
;obtain slot from PID
|
|
mov eax,ebx
|
|
call pid_to_slot
|
|
test eax,eax
|
|
jz .no_pid
|
|
mov ebp,eax
|
|
;ebp = slot of other process
|
|
shl eax,8
|
|
mov edi,[eax+0x80000+0xa0] ;is ipc area defined?
|
|
test edi,edi
|
|
jz .no_ipc_area
|
|
mov esi,[eax+0x80000+0xa4] ;esi - size of buffer
|
|
push dword -1 ;temp variable for read_process_memory
|
|
mov ebx,esp
|
|
push ecx
|
|
push edx
|
|
mov ecx,4 ;read 4 bytes
|
|
mov eax,ebp
|
|
mov edx,edi ;from beginning of buffer.
|
|
call read_process_memory
|
|
mov eax,[esp+8]
|
|
test eax,eax
|
|
jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now
|
|
add edx,4 ;move to next 4 bytes
|
|
mov eax,ebp
|
|
call read_process_memory ;read size of occupied space in buffer
|
|
sub esi,8
|
|
sub esi,[esp]
|
|
sub esi,[esp+8] ;esi=(buffer size)-(occupied size)-(message size)-(header of message size)
|
|
js .buffer_overflow ;esi<0 - not enough memory in buffer
|
|
mov esi,[esp+8] ;previous offset
|
|
add dword [esp+8],8
|
|
mov edi,[esp]
|
|
add [esp+8],edi ;add (size of message)+(size of header of message) to [buffer+4]
|
|
mov eax,ebp
|
|
call write_process_memory
|
|
add edx,esi
|
|
sub edx,4 ;move to beginning of place for our message
|
|
mov eax,[second_base_address+0x3010]
|
|
mov eax,[eax+0x4] ;eax - our PID
|
|
mov [esp+8],eax
|
|
mov eax,ebp
|
|
call write_process_memory ;write PID
|
|
mov ebx,esp ;address of size of message
|
|
mov eax,ebp
|
|
add edx,4
|
|
call write_process_memory ;write size of message
|
|
add edx,4
|
|
pop ecx ;ecx - size of message
|
|
pop eax
|
|
call trans_address
|
|
mov ebx,eax ;ebx - linear address of message
|
|
add esp,4 ;pop temporary variable
|
|
mov eax,ebp
|
|
call write_process_memory ;write message
|
|
sti
|
|
;awake other process
|
|
shl ebp,8
|
|
mov eax,ebp
|
|
or [eax+0x800A8],dword 0x40
|
|
|
|
cmp dword [check_idle_semaphore],20
|
|
jge .ipc_no_cis
|
|
mov dword [check_idle_semaphore],5
|
|
.ipc_no_cis:
|
|
mov dword [esp+36],0
|
|
ret
|
|
.no_ipc_send:
|
|
mov dword [esp+36],-1
|
|
ret
|
|
.no_pid:
|
|
sti
|
|
mov dword [esp+36],4
|
|
ret
|
|
.no_ipc_area:
|
|
sti
|
|
mov dword [esp+36],1
|
|
ret
|
|
.ipc_blocked:
|
|
sti
|
|
add esp,12
|
|
mov dword [esp+36],2
|
|
ret
|
|
.buffer_overflow:
|
|
sti
|
|
add esp,12
|
|
mov dword [esp+36],3
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
trans_address:
|
|
;Input
|
|
; eax - application address
|
|
;Output
|
|
; eax - linear address for kernel
|
|
add eax,std_application_base_address
|
|
ret
|
|
;-----------------------------------------------------------------------------
|
|
new_start_application_hd:
|
|
;eax - file name (kernel address)
|
|
;ebx - file name length
|
|
;ecx - work area (kernel address)
|
|
;ebp - parameters
|
|
pushad
|
|
|
|
mov esi,new_process_loading
|
|
call sys_msg_board_str ;write message to message board
|
|
|
|
;lock application_table_status mutex
|
|
.table_status:
|
|
cli
|
|
cmp [application_table_status],0
|
|
jz .stf
|
|
sti
|
|
call change_task
|
|
jmp .table_status
|
|
.stf:
|
|
call set_application_table_status
|
|
|
|
push ebp
|
|
push ebx
|
|
push eax
|
|
push ecx
|
|
call find_new_process_place ;find new process slot
|
|
sti
|
|
test eax,eax
|
|
jz .failed
|
|
|
|
;write application name
|
|
mov eax,[esp+4]
|
|
.find_last_byte:
|
|
cmp byte [eax],0
|
|
jz .find_last_byte_end
|
|
inc eax
|
|
jmp .find_last_byte
|
|
.find_last_byte_end:
|
|
lea esi,[eax-11] ;last 11 bytes = application name
|
|
mov edi,[new_process_place]
|
|
shl edi,8
|
|
add edi,0x80000
|
|
mov ecx,11
|
|
cld
|
|
rep movsb ;copy name to extended information about process
|
|
|
|
;read header
|
|
mov eax,[esp+4] ;file name
|
|
mov esi,[esp] ;work area
|
|
mov ecx,1 ;read from first block
|
|
mov edx,1 ;read 1 block
|
|
call read_hd_file
|
|
test eax,eax
|
|
jnz .cleanfailed
|
|
|
|
mov esi,[esp]
|
|
;check menuet signature
|
|
cmp [esi+1024+0],dword 'MENU' ;read_hd_file function write file to +1024 offset
|
|
jnz .cleanfailed
|
|
cmp [esi+1024+4],word 'ET'
|
|
jnz .cleanfailed
|
|
add esi,1024
|
|
mov edi,0x90000
|
|
mov ecx,512/4
|
|
cld
|
|
rep movsd ;copy first block to 0x90000 address for get_app_params function
|
|
call get_app_params
|
|
test esi,esi
|
|
jz .cleanfailed
|
|
|
|
mov eax,[new_process_place]
|
|
call create_app_cr3_table ;create page directory
|
|
test eax,eax
|
|
jz .cleanfailed_mem
|
|
|
|
call MEM_Get_Linear_Address
|
|
|
|
mov ebx,std_application_base_address
|
|
mov ecx,[app_mem]
|
|
add ecx,4096-1
|
|
shr ecx,12
|
|
mov edx,eax ;edx - linear address of page directory
|
|
call mem_alloc_specified_region ;allocate memory for application
|
|
test eax,eax
|
|
jz .cleanfailed_mem
|
|
|
|
add edx,(std_application_base_address shr 20)
|
|
mov eax,[edx]
|
|
and eax,not (4096-1)
|
|
call MEM_Get_Linear_Address
|
|
push edx ;save pointer to first page table
|
|
mov edx,eax
|
|
;read file
|
|
mov ecx,1
|
|
xor ebp,ebp
|
|
.loop1:
|
|
;[esp] - pointer to current page directory entry
|
|
;edx - pointer to current page table
|
|
;ebp - offset in page
|
|
;ecx - current cluster
|
|
push edx
|
|
mov eax,[esp+12] ;file name
|
|
mov ebx,[esp+16] ;file name length
|
|
mov esi,[esp+8] ;work area
|
|
mov edx,1 ;number of blocks to read
|
|
push ecx
|
|
push ebp
|
|
cli
|
|
call read_hd_file
|
|
sti
|
|
pop ebp
|
|
test eax,eax
|
|
jnz .endloop1 ;check io errors
|
|
|
|
mov esi,[esp+8+4] ;work area
|
|
add esi,1024
|
|
mov eax,[esp+4] ;current page table
|
|
mov eax,[eax]
|
|
and eax,not (4096-1)
|
|
call MEM_Get_Linear_Address;calculate linear page address
|
|
lea edi,[eax+ebp] ;add page offset
|
|
mov ecx,512/4
|
|
cld
|
|
rep movsd ;copy data
|
|
|
|
pop ecx
|
|
inc ecx ;next block
|
|
mov eax,[app_i_end] ;todo: precalculate ([app_i_end]+4095)/4096
|
|
add eax,512-1
|
|
shr eax,9 ;calculate application image size
|
|
cmp ecx,eax
|
|
jg .endloop11
|
|
pop edx
|
|
add ebp,512 ;new offset
|
|
test ebp,4096
|
|
jz .loop1
|
|
xor ebp,ebp
|
|
add edx,4 ;go to next page
|
|
test edx,(4096-1)
|
|
jnz .loop1
|
|
add dword [esp],4 ;go to next directory entry
|
|
mov eax,[esp]
|
|
mov eax,[eax]
|
|
and eax,not (4096-1)
|
|
call MEM_Get_Linear_Address
|
|
mov edx,eax
|
|
jmp .loop1
|
|
.endloop1:
|
|
add esp,4 ;pop ecx
|
|
.endloop11:
|
|
add esp,4+4 ;pop edx, pop edx
|
|
|
|
;add_app_parameters
|
|
add esp,12 ;now pointer to parameters is on the top of the stack
|
|
call new_start_application_fl.add_app_parameters ;start process
|
|
mov [esp+28],eax
|
|
popad
|
|
ret
|
|
|
|
.cleanfailed_mem:
|
|
mov esi,start_not_enough_memory
|
|
call sys_msg_board_str
|
|
.cleanfailed: ;clean process name
|
|
mov edi,[new_process_place]
|
|
shl edi,8
|
|
add edi,0x80000
|
|
mov ecx,11
|
|
mov eax,' '
|
|
cld
|
|
rep stosb
|
|
.failed:
|
|
add esp,16
|
|
popad
|
|
mov eax,-1
|
|
mov [application_table_status],0
|
|
sti
|
|
ret
|
|
end if
|