NTFS reader, part 3: get file info & read normal files
taskman.inc: now invalid command line and/or path fields in program header
will not crash the kernel
git-svn-id: svn://kolibrios.org@262 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Evgeny Grechnikov (Diamond)
parent
853d0ada7d
commit
3fd82557ce
@ -998,15 +998,25 @@ proc set_app_params stdcall,slot:dword, params:dword,\
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mov edx,[edx] ;app_cmdline
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test edx,edx
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jz @F ;application don't need parameters
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mov eax, edx
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add eax, 256
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jc @f
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cmp eax, [PROC_BASE+APPDATA.mem_size+ebx*8]
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ja @f
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add edx, new_app_base
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stdcall k_strncpy, edx, [cmd_line], 255
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stdcall k_strncpy, edx, [cmd_line], 256
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@@:
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mov edx,[params]
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mov edx, [edx+4] ;app_path
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test edx,edx
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jz @F ;application don't need path of file
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mov eax, edx
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add eax, 1024
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jc @f
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cmp eax, [PROC_BASE+APPDATA.mem_size+ebx*8]
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ja @f
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add edx, new_app_base
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stdcall k_strncpy, edx, [app_path], 64
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stdcall k_strncpy, edx, [app_path], 1024
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@@:
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mov ebx,[slot]
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mov eax,ebx
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@ -293,6 +293,7 @@ ntfs_attr_iBaseRecord dd ?
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ntfs_attr_offs dd ?
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ntfs_attr_list dd ?
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ntfs_attr_size dq ?
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ntfs_cur_tail dd ?
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endg
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ntfs_read_attr:
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@ -434,6 +435,9 @@ ntfs_read_attr:
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.scancont:
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add eax, [eax+4]
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jmp .scanattr
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.continue:
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pushad
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and [ntfs_cur_read], 0
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.scandone:
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; c) Check for required offset and length
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mov ecx, [ntfs_attr_offs]
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@ -666,9 +670,13 @@ ntfs_read_attr:
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ret
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@@:
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; reduce read length
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and [ntfs_cur_tail], 0
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cmp [ntfs_cur_size], eax
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jb @f
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mov [ntfs_cur_size], eax
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mov eax, dword [ntfs_attr_size]
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and eax, 0x1FF
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mov [ntfs_cur_tail], eax
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@@:
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cmp [ntfs_cur_size], 0
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jz .okret
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@ -719,6 +727,11 @@ ntfs_read_attr:
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cmp [ntfs_cur_size], 0
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jnz .readloop
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add esp, 10h
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mov eax, [ntfs_cur_tail]
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test eax, eax
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jz .okret
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sub eax, 0x200
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add [ntfs_cur_read], eax
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jmp .okret
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.errread2:
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pop ecx
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@ -864,7 +877,7 @@ ntfs_decode_mcb_entry:
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ntfs_find_lfn:
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; in: esi->name
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; out: CF=1 - file not found
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; else CF=0 and eax=ntfs_cur_iRecord valid
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; else CF=0, [ntfs_cur_iRecord] valid, eax->record in parent directory
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mov [ntfs_cur_iRecord], 5 ; start parse from root cluster
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.doit2:
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mov [ntfs_cur_attr], 0x90 ; $INDEX_ROOT
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@ -1008,7 +1021,7 @@ ntfs_find_lfn:
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pop esi
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mov eax, [esi]
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mov [ntfs_cur_iRecord], eax
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mov [esp+1Ch], eax
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mov [esp+1Ch], esi
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mov [esp+4], edi
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popad
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inc esi
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@ -1031,8 +1044,132 @@ ntfs_find_lfn:
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;
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;--------------------------------------------------------------
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ntfs_HdRead:
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cmp byte [esi], 0
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jnz @f
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or ebx, -1
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mov eax, ERROR_UNSUPPORTED_FS
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push ERROR_ACCESS_DENIED
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pop eax
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ret
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@@:
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call ntfs_find_lfn
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jnc .found
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or ebx, -1
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push ERROR_FILE_NOT_FOUND
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pop eax
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ret
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.found:
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mov [ntfs_cur_attr], 0x80 ; $DATA
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and [ntfs_cur_offs], 0
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and [ntfs_cur_size], 0
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call ntfs_read_attr
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jnc @f
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or ebx, -1
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push ERROR_ACCESS_DENIED
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pop eax
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ret
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@@:
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pushad
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and dword [esp+10h], 0
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xor eax, eax
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test ebx, ebx
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jz .zero1
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cmp dword [ebx+4], 0x200
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jb @f
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.eof0:
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popad
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xor ebx, ebx
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.eof:
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push ERROR_END_OF_FILE
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pop eax
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ret
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@@:
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mov eax, [ebx]
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test eax, 0x1FF
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jz .alignedstart
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push edx
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mov edx, [ebx+4]
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shrd eax, edx, 9
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pop edx
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mov [ntfs_cur_offs], eax
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mov [ntfs_cur_size], 1
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mov [ntfs_cur_buf], ntfs_bitmap_buf
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call ntfs_read_attr.continue
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mov eax, [ebx]
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and eax, 0x1FF
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lea esi, [ntfs_bitmap_buf+eax]
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sub eax, [ntfs_cur_read]
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jae .eof0
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neg eax
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push ecx
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cmp ecx, eax
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jb @f
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mov ecx, eax
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@@:
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mov [esp+10h+4], ecx
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mov edi, edx
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rep movsb
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mov edx, edi
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pop ecx
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sub ecx, [esp+10h]
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jnz @f
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.retok:
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popad
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xor eax, eax
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ret
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@@:
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cmp [ntfs_cur_read], 0x200
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jz .alignedstart
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.eof_ebx:
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popad
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jmp .eof
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.alignedstart:
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mov eax, [ebx]
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push edx
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mov edx, [ebx+4]
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add eax, 511
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adc edx, 0
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shrd eax, edx, 9
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pop edx
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.zero1:
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mov [ntfs_cur_offs], eax
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mov [ntfs_cur_buf], edx
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mov eax, ecx
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shr eax, 9
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mov [ntfs_cur_size], eax
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add eax, [ntfs_cur_offs]
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push eax
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call ntfs_read_attr.continue
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pop [ntfs_cur_offs]
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mov eax, [ntfs_cur_read]
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add [esp+10h], eax
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mov eax, ecx
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and eax, not 0x1FF
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cmp [ntfs_cur_read], eax
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jnz .eof_ebx
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and ecx, 0x1FF
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jz .retok
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add edx, [ntfs_cur_read]
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mov [ntfs_cur_size], 1
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mov [ntfs_cur_buf], ntfs_bitmap_buf
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call ntfs_read_attr.continue
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cmp [ntfs_cur_read], ecx
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jb @f
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mov [ntfs_cur_read], ecx
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@@:
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xchg ecx, [ntfs_cur_read]
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push ecx
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mov edi, edx
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mov esi, ntfs_bitmap_buf
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add [esp+10h+4], ecx
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rep movsb
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pop ecx
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xor eax, eax
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cmp ecx, [ntfs_cur_read]
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jz @f
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mov al, ERROR_END_OF_FILE
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@@:
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mov [esp+1Ch], eax
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popad
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ret
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;----------------------------------------------------------------
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@ -1344,32 +1481,7 @@ ntfs_HdReadFolder:
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js .ret
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inc dword [eax+4] ; new file block copied
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mov eax, [edx+4] ; flags
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ntfs_direntry_to_bdfe:
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mov [edi+4], eax ; ANSI/UNICODE name
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mov eax, [esi+48h]
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test eax, 0x10000000
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jz @f
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and eax, not 0x10000000
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or al, 0x10
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@@:
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stosd
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scasd
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push edx
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mov eax, [esi+0x18]
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mov edx, [esi+0x1C]
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call ntfs_datetime_to_bdfe
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mov eax, [esi+0x30]
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mov edx, [esi+0x34]
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call ntfs_datetime_to_bdfe
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mov eax, [esi+0x20]
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mov edx, [esi+0x24]
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call ntfs_datetime_to_bdfe
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pop edx
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mov eax, [esi+0x40]
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stosd
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mov eax, [esi+0x44]
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stosd
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call ntfs_direntry_to_bdfe
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push ecx esi edi
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movzx ecx, byte [esi+0x50]
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add esi, 0x52
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@ -1399,6 +1511,33 @@ ntfs_direntry_to_bdfe:
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pop esi ecx
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ret
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ntfs_direntry_to_bdfe:
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mov [edi+4], eax ; ANSI/UNICODE name
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mov eax, [esi+48h]
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test eax, 0x10000000
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jz @f
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and eax, not 0x10000000
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or al, 0x10
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@@:
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stosd
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scasd
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push edx
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mov eax, [esi+0x18]
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mov edx, [esi+0x1C]
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call ntfs_datetime_to_bdfe
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mov eax, [esi+0x30]
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mov edx, [esi+0x34]
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call ntfs_datetime_to_bdfe
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mov eax, [esi+0x20]
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mov edx, [esi+0x24]
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call ntfs_datetime_to_bdfe
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pop edx
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mov eax, [esi+0x40]
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stosd
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mov eax, [esi+0x44]
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stosd
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ret
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iglobal
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_24 dd 24
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_60 dd 60
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@ -1570,6 +1709,27 @@ ntfs_HdDelete:
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ret
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ntfs_HdGetFileInfo:
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mov eax, ERROR_UNSUPPORTED_FS
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cmp byte [esi], 0
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jnz @f
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push 2
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pop eax
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ret
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@@:
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call ntfs_find_lfn
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jnc .doit
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push ERROR_FILE_NOT_FOUND
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pop eax
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cmp [hd_error], 0
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jz @f
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mov al, 11
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@@:
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ret
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.doit:
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push esi edi
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mov esi, eax
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mov edi, edx
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xor eax, eax
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call ntfs_direntry_to_bdfe
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pop edi esi
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xor eax, eax
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ret
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