From 16a184061beff49314dbea4b9ae926cee34247e5 Mon Sep 17 00:00:00 2001 From: Marat Zakiyanov Date: Sat, 2 Apr 2022 21:38:53 +0000 Subject: [PATCH] exFAT_Delete - delete file/folder (F70.8) git-svn-id: svn://kolibrios.org@9755 a494cfbc-eb01-0410-851d-a64ba20cac60 --- kernel/trunk/fs/exfat.inc | 527 +++++++++++++++++++++++++++++++++++++- 1 file changed, 514 insertions(+), 13 deletions(-) diff --git a/kernel/trunk/fs/exfat.inc b/kernel/trunk/fs/exfat.inc index 3e61b77ecc..2e4ee51228 100644 --- a/kernel/trunk/fs/exfat.inc +++ b/kernel/trunk/fs/exfat.inc @@ -27,7 +27,7 @@ exFAT_user_functions: dd exFAT_GetFileInfo dd exFAT_SetFileInfo dd 0 - dd 0 ;exFAT_Delete + dd exFAT_Delete dd 0 ;exFAT_CreateFolder dd 0 ;exFAT_Rename exFAT_user_functions_end: @@ -35,11 +35,11 @@ endg struct exFAT PARTITION fat_change db ? ; 1=fat has changed +ClstHeap_change db ? ; 1=Cluster Heap has changed createOption db ? rb 2 Lock MUTEX ; currently operations with one partition ; can not be executed in parallel since the legacy code is not ready -fat_in_cache dd ? FAT_START dd ? ; start of fat table ROOT_START dd ? ; start of rootdir SECTORS_PER_CLUSTER dd ? @@ -57,11 +57,12 @@ fatMASK dd ? fatStartScan dd ? cluster_tmp dd ? ; used by analyze_directory and analyze_directory_to_write ROOT_CLUSTER dd ? ; first rootdir cluster -fat_cache_ptr dd ? points_to_BDFE dd ? secondary_dir_entry dd ? longname_sec1 dd ? ; used by analyze_directory to save 2 previous longname_sec2 dd ? ; directory sectors for delete long filename +longname_sector1 dd ? ; used by analyze_directory to save 2 previous +longname_sector2 dd ? ; directory sectors for delete long filename LFN_reserve_place dd ? path_in_UTF8 dd ? General_Sec_Flags dd ? @@ -77,8 +78,12 @@ buffer_curr_sector dd ? buff_file_dirsect dd ? buff_file_dir_pos dd ? fname_extdir_offset dd ? +fat_in_cache dd ? +fat_cache_ptr dd ? +ClstHeap_in_cache dd ? +ClstHeap_cache_ptr dd ? volumeLabel rb 12 -; The next nine areas (32*17) should be arranged sequentially. +; The next areas (32*19) should be arranged sequentially. ; Do not change their location!!! file_dir_entry rb 32 ; Entry Type 0x85 str_ext_dir_entry rb 32 ; Entry Type 0xC0 @@ -299,11 +304,14 @@ exFAT_create_partition: ; mov [ebp+FAT.fs_type], al ;------------------------------------------------------------------------------ ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. - mov eax, 512 +; For exFAT allocate 512 bytes for Cluster Heap cache. + mov eax, 512*2 call malloc test eax, eax jz .free_return0 mov [ebp+exFAT.fat_cache_ptr], eax + add eax, 512 + mov [ebp+exFAT.ClstHeap_cache_ptr], eax ; DEBUGF 1, "K : malloc exFAT.fat_cache_ptr EAX: %x\n", eax mov eax, ebp @@ -371,6 +379,16 @@ exFAT_get_name: stc ret ;-------------------------------------- +.save_curr_sector_number: + mov eax, [ebp+exFAT.buffer_curr_sector] + cmp eax, [ebp+exFAT.longname_sector2] + je @f + push [ebp+exFAT.longname_sector2] + pop [ebp+exFAT.longname_sector1] + mov [ebp+exFAT.longname_sector2], eax +@@: + ret +;-------------------------------------- .file_directory_entry: ; DEBUGF 1, "K : exFAT_get_name 0x85\n" mov eax, [ebp+exFAT.buffer_curr_sector] @@ -381,6 +399,8 @@ exFAT_get_name: mov [ebp+exFAT.fname_extdir_offset], eax xor eax, eax + mov [ebp+exFAT.longname_sector1], eax + mov [ebp+exFAT.longname_sector2], eax mov [ebp+exFAT.hash_flag], eax ; dword 0 mov al, byte [edi+1] ; Number of Secondary directory entries dec eax @@ -393,6 +413,7 @@ exFAT_get_name: .stream_extension_directory_entry: ; DEBUGF 1, "K : exFAT_get_name 0xC0\n" ; DEBUGF 1, "K : exFAT SEDE need_hash :%x\n", [ebp+exFAT.need_hash] + call .save_curr_sector_number mov eax, [ebp+exFAT.need_hash] test eax, eax jz .stream_extension_directory_entry_1 ; @f @@ -441,7 +462,7 @@ exFAT_get_name: ; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4] ; DEBUGF 1, "K : exFAT_get_name.longname Input FS EBP:%x\n", ebp ; pop ebp - + call .save_curr_sector_number mov eax, [ebp+exFAT.hash_flag] test eax, eax jnz .no @@ -655,6 +676,51 @@ exFAT_bdfe_to_fat_entry: ; DEBUGF 1, "K : exFAT write date: %x\n", ax ret ;------------------------------------------------------------------------------ +exFAT_set_FAT: +; in: eax = cluster, edx = value to save +; out: edx = old value, CF=1 -> error + push eax ebx esi + cmp eax, 2 + jc .ret + cmp [ebp+exFAT.LAST_CLUSTER], eax + jc .ret + add eax, eax +@@: + add eax, eax + mov esi, 511 + and esi, eax + shr eax, 9 + add eax, [ebp+exFAT.FAT_START] + mov ebx, [ebp+exFAT.fat_cache_ptr] + cmp eax, [ebp+exFAT.fat_in_cache] + je .inCache + cmp [ebp+exFAT.fat_change], 0 + je @f + call exFAT_write_fat_sector +@@: + mov [ebp+exFAT.fat_in_cache], eax + call fs_read32_sys + test eax, eax + jne .error +.inCache: + mov eax, [ebp+exFAT.fatMASK] + and edx, eax + xor eax, -1 ; mask for high bits + and eax, [ebx+esi] ; get high 4 bits + or eax, edx + mov edx, [ebx+esi] ; get old value + mov [ebx+esi], eax ; save new value +.write: + mov [ebp+exFAT.fat_change], 1 + and edx, [ebp+exFAT.fatMASK] +.ret: + pop esi ebx eax + ret + +.error: + stc + jmp .ret +;------------------------------------------------------------------------------ exFAT_get_FAT: ; DEBUGF 1, "K : exFAT_get_FAT \n" ; in: eax = cluster @@ -677,7 +743,7 @@ exFAT_get_FAT: je .inCache cmp [ebp+exFAT.fat_change], 0 je @f -; call write_fat_sector + call exFAT_write_fat_sector @@: mov [ebp+exFAT.fat_in_cache], eax call fs_read32_sys @@ -735,9 +801,11 @@ exFAT_hd_find_lfn: cmp byte [esi], 0 jz .found ; test byte [edi+11], 10h + push eax lea eax, [ebp+exFAT.file_dir_entry] ; DEBUGF 1, "K : exFAT_hd_find_lfn exFAT.file_dir_entry [EAX]: %x\n", [eax] test byte [eax+4], 10000b + pop eax jz .notfound and dword [esp+12], 0 ; this entry’s first cluster number @@ -765,7 +833,7 @@ exFAT_hd_find_lfn: jmp .loop .notfound: -; DEBUGF 1, "K : exFAT_hd_find_lfn.notfound \n" +; DEBUGF 1, "K : exFAT_hd_find_lfn.notfound EAX:%x\n", eax add esp, 16 pop edi esi stc @@ -952,16 +1020,20 @@ align 4 ; DEBUGF 1, "K : exFAT General_Sec_Flags %x\n", [ebp+exFAT.General_Sec_Flags] ; DEBUGF 1, "K : exFAT.valid_data_length 2 %x\n", [ebp+exFAT.valid_data_length] cmp [ebp+exFAT.valid_data_length], 0 - jbe @f - + jbe .error +; DEBUGF 1, "K : exFAT_find_lfn call dword[eax-8] ; exFAT_notroot_next: \n" call dword[eax-8] ; exFAT_notroot_next jnc .l1 @@: +; DEBUGF 1, "K : exFAT_find_lfn.@@: \n" add esp, 262*2 .reterr: ; DEBUGF 1, "K : exFAT_find_lfn.reterr \n" stc ret +.error: + movi eax, ERROR_FILE_NOT_FOUND + jmp @b ;------------------------------------------------------------------------------ exFAT_ReadFile: ; DEBUGF 1, "K : exFAT_ReadFile \n" @@ -1648,7 +1720,10 @@ exFAT_ReadFolder: add ebx, 512 push eax .l1: -; DEBUGF 1, "K : exFAT_ReadFolder.l1 \n" +; cmp [edi], dword 0 +; je .l1_1 +; DEBUGF 1, "K : exFAT_ReadFolder.l1 [EDI]:%x\n", [edi] +;.l1_1: ; push esi ; lea esi, [esp+20] ; DEBUGF 1, "K : exFAT RD need_hash :%x\n", [ebp+exFAT.need_hash] @@ -1982,6 +2057,280 @@ exFAT_SetFileInfo: pop eax ret ;------------------------------------------------------------------------------ +exFAT_Delete: +; DEBUGF 1, "K : exFAT_Delete\n" +; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx] +; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4] +; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8] +; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12] +; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16] +; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20] +; DEBUGF 1, "K : exFAT Path: %s\n", esi + call exFAT_lock + xor eax, eax + mov [ebp+exFAT.need_hash], eax ; dword 0 + mov [ebp+exFAT.hash_flag], eax ; dword 0 +; and [ebp+exFAT.longname_sec1], 0 +; and [ebp+exFAT.longname_sec2], 0 + mov [ebp+exFAT.longname_sec1], eax + mov [ebp+exFAT.longname_sec2], eax + call exFAT_hd_find_lfn + jc .notFound +; cmp dword [edi], '. ' +; jz .access_denied2 +; cmp dword [edi], '.. ' +; jz .access_denied2 +; test byte [edi+11], 10h + push eax + lea eax, [ebp+exFAT.file_dir_entry] +; DEBUGF 1, "K : exFAT_Delete: File Attributes:%x\n", [eax+4] + test byte [eax+4], 10000b + pop eax + jz .dodel +; we can delete only empty folders! + pushad +; mov esi, [edi+20-2] +; mov si, [edi+26] ; esi=cluster + lea eax, [ebp+exFAT.str_ext_dir_entry] + mov esi, [eax+20] ; cluster +; DEBUGF 1, "K : exFAT_Delete: Cluster1:%x [EDI+20]:%x\n", esi, [edi+20] + xor ecx, ecx + lea eax, [esi-2] + imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] + add eax, [ebp+exFAT.DATA_START] +; add eax, [ebp+exFAT.CLUSTER_HEAP_START] + lea ebx, [ebp+exFAT.buffer] + call fs_read32_sys + test eax, eax + jnz .err1 + lea eax, [ebx+0x200] +; add ebx, 2*0x20 +.checkempty: +; DEBUGF 1, "K : exFAT_Delete.checkempty: [EBX]:%x\n", [ebx] + cmp byte [ebx], 0 ; DIR_Name[0] == 0x00, then the directory entry is free + jz .empty +; cmp byte [ebx], 0xE5 ; DIR_Name[0] == 0xE5, then the directory entry is free +; jnz .notempty + cmp byte [ebx], 0x85 ; File/Folder Directory Entry of ExFAT + jz .notempty + cmp byte [ebx], 0xC0 ; Stream Extension Directory Entry of ExFAT + jz .notempty + cmp byte [ebx], 0xC1 ; File Name Extension Directory Entry of ExFAT + jz .notempty + add ebx, 0x20 + cmp ebx, eax + jb .checkempty + inc ecx + cmp ecx, [ebp+exFAT.SECTORS_PER_CLUSTER] + jb @f + mov eax, esi +; Check - General Secondary Flags +; Bit 0 : Allocation possible +; 0 – No cluster allocated; 1 – cluster allocation is possible +; Bit 1 : No FAT chain +; 0 – Yes ; The clusters of this file/directory are NOT contiguous +; 1 – No; The Contiguous Cluster are allocated to this file/directory; +; This improves the File read performance +; Bits 2 – 7 : Reserved + test byte [ebp+exFAT.General_Sec_Flags], 10b + jz .get_FAT + inc eax ; inc cluster + jmp .continue +.get_FAT: +; DEBUGF 1, "K : exFAT_Delete.get_FAT:\n" + call exFAT_get_FAT + jc .err1 + cmp eax, 2 + jb .error_fat +.continue: +; DEBUGF 1, "K : exFAT_Delete.continue:\n" + cmp eax, [ebp+exFAT.fatRESERVED] + jae .empty + mov esi, eax + xor ecx, ecx +@@: +; DEBUGF 1, "K : exFAT_Delete.@@:\n" + lea eax, [esi-2] + imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] + add eax, [ebp+exFAT.DATA_START] +; add eax, [ebp+exFAT.CLUSTER_HEAP_START] + add eax, ecx + lea ebx, [ebp+exFAT.buffer] + call fs_read32_sys + test eax, eax + lea eax, [ebx+0x200] + jz .checkempty +.err1: +; DEBUGF 1, "K : exFAT_Delete.err1:\n" + popad +.err2: +; DEBUGF 1, "K : exFAT_Delete.err2:\n" + push ERROR_DEVICE +.ret: +; DEBUGF 1, "K : exFAT_Delete.ret:\n" + call exFAT_unlock + pop eax + ret + +.notFound: +; DEBUGF 1, "K : exFAT_Delete.notFound:\n" + push ERROR_FILE_NOT_FOUND + jmp .ret + +.error_fat: +; DEBUGF 1, "K : exFAT_Delete.error_fat:\n" + popad + push ERROR_FS_FAIL + jmp .ret + +.notempty: +; DEBUGF 1, "K : exFAT_Delete.notempty:\n" + popad +.access_denied2: +; DEBUGF 1, "K : exFAT_Delete.access_denied2:\n" + push ERROR_ACCESS_DENIED + jmp .ret + +.empty: +; DEBUGF 1, "K : exFAT_Delete.empty:\n" + popad + push eax ebx + lea ebx, [ebp+exFAT.buffer] + call fs_read32_sys + test eax, eax + pop ebx eax + jnz .err2 +.dodel: +; DEBUGF 1, "K : exFAT_Delete.dodel:\n" + push eax +; mov eax, [edi+20-2] +; mov ax, [edi+26] ; eax=cluster + lea eax, [ebp+exFAT.str_ext_dir_entry] + mov eax, [eax+20] ; cluster +; DEBUGF 1, "K : exFAT_Delete: Cluster2:%x [EDI+20]:%x\n", eax, [edi+20] + xchg eax, [esp] + + mov edi, [ebp+exFAT.buff_file_dir_pos] + cmp eax, [ebp+exFAT.buff_file_dirsect] + je .continue_2 + + mov eax, [ebp+exFAT.buff_file_dirsect] + mov [ebp+exFAT.buffer_curr_sector], eax + + push eax ebx + lea ebx, [ebp+exFAT.buffer] + call fs_read32_sys + test eax, eax + jz .continue_1 ; CF=0 + + pop ebx + add esp, 4 + jmp .err2 + +.continue_1: +; DEBUGF 1, "K : exFAT_Delete.continue_1:\n" + pop ebx eax + +.continue_2: +; DEBUGF 1, "K : exFAT_Delete.continue_2: EAX:%x\n", eax + push ecx +; delete folder entry +; mov byte [edi], 0xE5 ; for FAT + and byte [edi], 0x7F ; Entry Type is 0x85 is changed to 0x05 + movzx ecx, byte [edi+1] ; Number of Secondary directory entries + inc ecx +; delete LFN (if present) +.lfndel: +; DEBUGF 1, "K : exFAT_Delete.lfndel: [EDI]:%x\n", [edi] + add edi, 0x20 +; lea edx, [ebp+exFAT.buffer] + lea edx, [ebp+exFAT.buffer+0x200] +; cmp edi, edx + cmp edx, edi + ja @f + +; cmp [ebp+exFAT.longname_sec2], 0 +; jz .lfndone +; push [ebp+exFAT.longname_sec2] +; push [ebp+exFAT.longname_sec1] +; pop [ebp+exFAT.longname_sec2] +; and [ebp+exFAT.longname_sec1], 0 +; DEBUGF 1, "K : exFAT_Delete: lngnm_sec1:%x lngnm_sec2:%x\n", [ebp+exFAT.longname_sector1], [ebp+exFAT.longname_sector2] + cmp [ebp+exFAT.longname_sector1], 0 + je .longname_sec2 + + push eax + mov eax, [ebp+exFAT.buff_file_dirsect] + cmp eax, [ebp+exFAT.longname_sector1] + pop eax +; je .longname_sec2 + jne .longname_sec1 + and [ebp+exFAT.longname_sector1], 0 + jmp .longname_sec2 +.longname_sec1: + push [ebp+exFAT.longname_sector1] + and [ebp+exFAT.longname_sector1], 0 + jmp .longname_sec3 +.longname_sec2: +; DEBUGF 1, "K : exFAT_Delete.longname_sec2:\n" + cmp [ebp+exFAT.longname_sector2], 0 + je .lfndone + + push eax + mov eax, [ebp+exFAT.buff_file_dirsect] + cmp eax, [ebp+exFAT.longname_sector2] + pop eax + je .lfndone + + push [ebp+exFAT.longname_sector2] + and [ebp+exFAT.longname_sector2], 0 +.longname_sec3: +; DEBUGF 1, "K : exFAT_Delete.longname_sec3:\n" + + push ebx +; mov ebx, edx + lea ebx, [ebp+exFAT.buffer] + call fs_write32_sys + mov eax, [esp+4] +; DEBUGF 1, "K : exFAT_Delete: EAX:%x\n", eax + call fs_read32_sys + pop ebx + pop eax +; lea edi, [ebp+exFAT.buffer+0x200] + lea edi, [ebp+exFAT.buffer] +@@: +; DEBUGF 1, "K : exFAT_Delete.@@: [EDI]:%x\n", [edi] +; sub edi, 0x20 +;; add edi, 0x20 +; cmp byte [edi], 0xE5 +; jz .lfndone + dec ecx + jz .lfndone + cmp byte [edi], 0 + jz .lfndone + cmp byte [edi], 0x85 + jz .lfndone +; cmp byte [edi+11], 0xF +; jnz .lfndone +; mov byte [edi], 0xE5 + and byte [edi], 0x7F ; 0xC0 is changed to 0x40; 0xC1 is changed to 0x41 + jmp .lfndel +.lfndone: +; DEBUGF 1, "K : exFAT_Delete.lfndone:\n" + pop ecx + push ebx + lea ebx, [ebp+exFAT.buffer] + call fs_write32_sys + pop ebx +; delete FAT chain + pop eax + call exFAT_clear_Cluster_Heap + call exFAT_clear_cluster_chain + call exFAT_update_disk + call exFAT_unlock + xor eax, eax + ret +;------------------------------------------------------------------------------ calculate_SetChecksum_field: push ebx ecx edx esi edi lea esi, [ebp+exFAT.file_dir_entry] @@ -2037,11 +2386,163 @@ align 4 pop edi esi edx ecx ebx ret ;------------------------------------------------------------------------------ +exFAT_clear_Cluster_Heap: +; in: eax = first cluster + +;ClstHeap_change db ? ; 1=Cluster Heap has changed +;ClstHeap_in_cache dd ? +;ClstHeap_cache_ptr dd ? + + push eax ebx ecx edx esi + mov ebx, [ebp+exFAT.ClstHeap_cache_ptr] + push eax + lea eax, [ebp+exFAT.str_ext_dir_entry] + mov edx, [eax+12] ; high dword of real file size +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap Hdword file size:%x\n", edx + mov eax, [eax+8] ; low dword of real file size +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap Ldword file size:%x\n", eax + mov ecx, [ebp+exFAT.SECTORS_PER_CLUSTER] +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap SECTORS_PER_CLUSTER:%x\n", ecx + shl ecx, 9 + div ecx + test edx, edx + jz @f + inc eax +@@: + mov edx, eax +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap number of clusters:%x\n", edx + pop eax +.start: +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap current cluster:%x\n", eax + cmp eax, [ebp+exFAT.LAST_CLUSTER] + ja .exit + cmp eax, 2 + jb .exit + cmp eax, [ebp+exFAT.ROOT_CLUSTER] + jz .exit + + push eax + dec eax + dec eax + + mov ecx, 7 + and ecx, eax ; get offset of bits +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of bits:%x\n", ecx + shr eax, 3 + + mov esi, 511 + and esi, eax ; get offset of bytes +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of bytes:%x\n", esi + shr eax, 9 ; get get offset of sectors +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of sectors:%x\n", eax + add eax, [ebp+exFAT.CLUSTER_HEAP_START] +; DEBUGF 1, "K : exFAT_clear_Cluster_Heap general offset:%x\n", eax + cmp eax, [ebp+exFAT.ClstHeap_in_cache] + je .inCache + + cmp [ebp+exFAT.ClstHeap_change], 0 + je @f + + mov [ebp+exFAT.ClstHeap_change], 0 + push eax + mov eax, [ebp+exFAT.ClstHeap_in_cache] + call fs_write32_sys + pop eax +@@: + mov [ebp+exFAT.ClstHeap_in_cache], eax + call fs_read32_sys + test eax, eax + jne .error +.inCache: + xor eax, eax + mov al, [ebx+esi] ; get Cluster_Heap old value +; DEBUGF 1, "K : exFAT Cluster_Heap old value:%x\n", eax + ror al, cl + and al, 0xfe ; reset bit + rol al, cl + mov [ebx+esi], al ; save Cluster_Heap new value + +; DEBUGF 1, "K : exFAT Cluster_Heap new value:%x\n", eax + mov [ebp+exFAT.ClstHeap_change], 1 + pop eax +; Check - General Secondary Flags +; Bit 0 : Allocation possible +; 0 – No cluster allocated; 1 – cluster allocation is possible +; Bit 1 : No FAT chain +; 0 – Yes ; The clusters of this file/directory are NOT contiguous +; 1 – No; The Contiguous Cluster are allocated to this file/directory; +; This improves the File read performance +; Bits 2 – 7 : Reserved +; DEBUGF 1, "K : exFAT General_Sec_Flags %x\n", [ebp+exFAT.General_Sec_Flags] + test byte [ebp+exFAT.General_Sec_Flags], 10b + jz .get_FAT + + dec edx ; dec cluster counter + jz .exit + + inc eax ; inc cluster + jmp .start +.get_FAT: + call exFAT_get_FAT + jc .ret + jmp .start +.error: + pop eax + stc + jmp .ret +.exit: + clc +.ret: + pop esi edx ecx ebx eax + ret +;------------------------------------------------------------------------------ +exFAT_clear_cluster_chain: +; in: eax = first cluster +; DEBUGF 1, "K : exFAT_clear_cluster_chain: GSF:%x\n", [ebp+exFAT.General_Sec_Flags] +; Check - General Secondary Flags +; Bit 0 : Allocation possible +; 0 – No cluster allocated; 1 – cluster allocation is possible +; Bit 1 : No FAT chain +; 0 – Yes ; The clusters of this file/directory are NOT contiguous +; 1 – No; The Contiguous Cluster are allocated to this file/directory; +; This improves the File read performance +; Bits 2 – 7 : Reserved + test byte [ebp+exFAT.General_Sec_Flags], 10b + jz .set_FAT + ret +.set_FAT: + push eax edx +@@: + cmp eax, [ebp+exFAT.LAST_CLUSTER] + ja @f + cmp eax, 2 + jb @f + cmp eax, [ebp+exFAT.ROOT_CLUSTER] + jz @f + xor edx, edx + call exFAT_set_FAT + jc .ret + + mov eax, edx + jmp @b +@@: + clc +.ret: + pop edx eax + ret +;------------------------------------------------------------------------------ exFAT_update_disk: + cmp [ebp+exFAT.ClstHeap_change], 0 + je @f + mov [ebp+exFAT.ClstHeap_change], 0 + push eax ebx + mov eax, [ebp+exFAT.ClstHeap_in_cache] + mov ebx, [ebp+exFAT.ClstHeap_cache_ptr] + call fs_write32_sys + pop ebx eax +@@: cmp [ebp+exFAT.fat_change], 0 jz .noChange -; cmp [ebp+FAT.fs_type], 12 -; jz .fat12 call exFAT_write_fat_sector .noChange: mov esi, [ebp+PARTITION.Disk]