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Rev 8680 Rev 8912
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;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
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;;  Distributed under terms of the GNU General Public License.  ;;
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;;  Distributed under terms of the GNU General Public License.  ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 8680 $
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$Revision: 8912 $
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ERROR_SUCCESS        = 0
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ERROR_SUCCESS        = 0
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ERROR_DISK_BASE      = 1
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ERROR_DISK_BASE      = 1
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maxPathLength = 1000h
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maxPathLength = 1000h
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image_of_eax EQU esp+32
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image_of_eax EQU esp+32
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image_of_ebx EQU esp+20
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image_of_ebx EQU esp+20
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; System function 70 security check
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; ; System function 70 security check
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align 4
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; align 4
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proc file_system_is_operation_safe stdcall, inf_struct_ptr: dword
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; proc file_system_is_operation_safe stdcall, inf_struct_ptr: dword
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; in:
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; ; in:
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;      inf_struct_ptr = pointer to information structure was given to sysfn70
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; ;      inf_struct_ptr = pointer to information structure was given to sysfn70
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; out: ZF = 1 if operation is safe
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; ; out: ZF = 1 if operation is safe
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;      ZF = 0 if operation can cause kernel crash
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; ;      ZF = 0 if operation can cause kernel crash
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        push    ebx ecx edx
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;         push    ebx ecx edx
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        xor     ecx, ecx ; ecx - length of target buffer
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;         xor     ecx, ecx ; ecx - length of target buffer
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        mov     ebx, [inf_struct_ptr]
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;         mov     ebx, [inf_struct_ptr]
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        mov     edx, [ebx + 16] ; base of target buffer
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;         mov     edx, [ebx + 16] ; base of target buffer
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        cmp     dword [ebx], 0 ; if 70.0
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;         cmp     dword [ebx], 0 ; if 70.0
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        jnz     .case1
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;         jnz     .case1
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        mov     ecx, dword [ebx + 12]
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;         mov     ecx, dword [ebx + 12]
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        jmp     .end_switch
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;         jmp     .end_switch
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.case1:
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; .case1:
- 
 
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;         cmp     dword [ebx], 1 ; if 70.1
- 
 
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;         jnz     .case2_3
- 
 
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;         ;mov     ecx, 32
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;         cmp     dword [ebx + 8], 1 ; check encoding
- 
 
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;         jbe     .case1_304 ; if encdoing <= 1 i.e cpp866
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;         mov     ecx, 560 ; if unicode then bdvk block len is 560 bytes
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;         jmp     .case1_end
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; .case1_304:
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;         mov     ecx, 304 ; if cp866 then bdvk block len is 304 bytes
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; .case1_end:
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;         imul    ecx, dword [ebx + 12] ; multiply bdvk length by their count
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;         add     ecx, 32 ; add result header len
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;         jmp     .end_switch
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- 
 
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; .case2_3:
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;         cmp     dword [ebx], 3
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;         ja      .case5 ; if subfn > 3
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;         mov     ecx, dword [ebx + 12]
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;         jmp     .end_switch
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- 
 
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; .case5:
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;         cmp     dword [ebx], 5
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;         jnz     .case6
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;         mov     ecx, 40
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;         jmp     .end_switch
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- 
 
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; .case6:
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        cmp     dword [ebx], 1 ; if 70.1
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;         cmp     dword [ebx], 6
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        jnz     .case2_3
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        ;mov     ecx, 32
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        cmp     dword [ebx + 8], 1 ; check encoding
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        jbe     .case1_304 ; if encdoing <= 1 i.e cpp866
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        mov     ecx, 560 ; if unicode then bdvk block len is 560 bytes
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        jmp     .case1_end
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.case1_304:
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        mov     ecx, 304 ; if cp866 then bdvk block len is 304 bytes
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.case1_end:
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        imul    ecx, dword [ebx + 12] ; multiply bdvk length by their count
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;         jnz     .switch_none
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        add     ecx, 32 ; add result header len
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        jmp     .end_switch
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.case2_3:
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        cmp     dword [ebx], 3
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        ja      .case5 ; if subfn > 3
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        mov     ecx, dword [ebx + 12]
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        jmp     .end_switch
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.case5:
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        cmp     dword [ebx], 5
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        jnz     .case6
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        mov     ecx, 40
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        jmp     .end_switch
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.case6:
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        cmp     dword [ebx], 6
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        jnz     .switch_none
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        mov     ecx, 32
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;         mov     ecx, 32
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        jmp     .end_switch
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;         jmp     .end_switch
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.switch_none:
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; .switch_none:
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        mov     ecx, 1
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;         mov     ecx, 1
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        test    ecx, ecx
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;         test    ecx, ecx
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        jmp     .ret
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;         jmp     .ret
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.end_switch:
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; .end_switch:
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        ;;
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;         ;;
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        stdcall is_region_userspace, edx, ecx
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;         stdcall is_region_userspace, edx, ecx
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.ret:
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; .ret:
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        pop     edx ecx ebx
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;         pop     edx ecx ebx
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        ret
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;         ret
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endp
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; endp
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syscall_fileSystemUnicode:
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syscall_fileSystemUnicode:
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        mov     dword [image_of_eax], ERROR_MEMORY_POINTER
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        mov     dword [image_of_eax], ERROR_MEMORY_POINTER
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        ret
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        ret
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@@:
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@@:
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        jmp     fileSystemUnicode
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        jmp     fileSystemUnicode
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; temporarily commented out cause acpi driver (drivers/devman) uses sysfn70 via 0x40
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; so because drivers it kernel space, pointer checking fails
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; TODO solution: add filesystem functions without pointer checking to kernel exports
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; and make the driver use them, not int 0x40
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syscall_file_system_lfn:
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; syscall_file_system_lfn: ; with user pointer correctness checking
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; in: ebx -> f.70 parameter structure
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; ; in: ebx -> f.70 parameter structure
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        stdcall file_system_is_operation_safe, ebx
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;         stdcall file_system_is_operation_safe, ebx
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        jnz     @f
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;         jnz     @f
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        DEBUGF  1, "sysfn70 addr error\n"
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;         DEBUGF  1, "sysfn70 addr error\n"
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        mov     dword [image_of_eax], ERROR_MEMORY_POINTER
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;         mov     dword [image_of_eax], ERROR_MEMORY_POINTER
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        ret
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;         ret
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@@:
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; @@:
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        jmp     file_system_lfn
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;         jmp     file_system_lfn
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