mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-11-28 11:43:09 +03:00
Removed redundant .asm files.
git-svn-id: svn://kolibrios.org@4068 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
shikhin
parent
9e1cd84895
commit
61237b15f3
@ -1,408 +0,0 @@
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
;; ;;
|
||||
;; Contains ext2 block handling code. ;;
|
||||
;; ;;
|
||||
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
|
||||
;; Distributed under the terms of the new BSD license. ;;
|
||||
;; ;;
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Write ext2 block from memory to disk.
|
||||
; Input: eax = i_block (block number in ext2 terms);
|
||||
; ebx = buffer address
|
||||
; ebp = pointer to EXTFS
|
||||
; Output: eax = error code (0 implies no error)
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_write:
|
||||
push edx ebx ecx
|
||||
|
||||
mov edx, fs_write32_sys
|
||||
jmp ext2_block_modify
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Read ext2 block from disk to memory.
|
||||
; Input: eax = i_block (block number in ext2 terms);
|
||||
; ebx = address of where to read block
|
||||
; ebp = pointer to EXTFS
|
||||
; Output: eax = error code (0 implies no error)
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_read:
|
||||
push edx ebx ecx
|
||||
|
||||
mov edx, fs_read32_sys
|
||||
jmp ext2_block_modify
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Modify ext2 block.
|
||||
; Input: eax = i_block (block number in ext2 terms);
|
||||
; ebx = I/O buffer address;
|
||||
; edx = fs_read/write32_sys
|
||||
; ebp = pointer to EXTFS
|
||||
; edx, ebx, ecx on stack.
|
||||
; Output: eax = error code (0 implies no error)
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_modify:
|
||||
; Get block number in hard-disk terms in eax.
|
||||
mov ecx, [ebp + EXTFS.log_block_size]
|
||||
shl eax, cl
|
||||
mov ecx, eax
|
||||
push [ebp + EXTFS.count_block_in_block]
|
||||
|
||||
@@:
|
||||
mov eax, ecx
|
||||
call edx
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
inc ecx
|
||||
add ebx, 512
|
||||
dec dword[esp]
|
||||
jnz @B
|
||||
|
||||
xor eax, eax
|
||||
@@:
|
||||
pop ecx
|
||||
pop ecx ebx edx
|
||||
ret
|
||||
|
||||
.fail:
|
||||
mov eax, ERROR_DEVICE
|
||||
jmp @B
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Zeroes a block.
|
||||
; Input: ebx = block ID.
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: eax = error code.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_zero:
|
||||
push ebx
|
||||
|
||||
mov eax, ebx
|
||||
mov ebx, [ebp + EXTFS.ext2_temp_block]
|
||||
call ext2_block_read
|
||||
test eax, eax
|
||||
jnz .return
|
||||
|
||||
push edi ecx
|
||||
xor eax, eax
|
||||
mov ecx, [ebp + EXTFS.block_size]
|
||||
mov edi, [ebp + EXTFS.ext2_temp_block]
|
||||
rep stosb
|
||||
pop ecx edi
|
||||
|
||||
mov eax, [esp]
|
||||
call ext2_block_write
|
||||
|
||||
.return:
|
||||
pop ebx
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Allocates a block.
|
||||
; Input: eax = inode ID for "preference".
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: Block marked as set in block group.
|
||||
; eax = error code.
|
||||
; ebx = block ID.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_alloc:
|
||||
push [ebp + EXTFS.superblock + EXT2_SB_STRUC.blocks_count]
|
||||
push EXT2_BLOCK_GROUP_DESC.free_blocks_count
|
||||
push [ebp + EXTFS.superblock + EXT2_SB_STRUC.blocks_per_group]
|
||||
|
||||
lea ebx, [ebp + EXTFS.superblock + EXT2_SB_STRUC.free_block_count]
|
||||
push ebx
|
||||
|
||||
push ext2_bg_read_blk_bitmap
|
||||
|
||||
call ext2_resource_alloc
|
||||
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Zero-allocates a block.
|
||||
; Input: eax = inode ID for "preference".
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: Block marked as set in block group.
|
||||
; eax = error code.
|
||||
; ebx = block ID.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_calloc:
|
||||
call ext2_block_alloc
|
||||
test eax, eax
|
||||
jnz @F
|
||||
|
||||
call ext2_block_zero
|
||||
@@:
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Frees a block.
|
||||
; Input: eax = block ID.
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: Block marked as free in block group.
|
||||
; eax = error code.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_free:
|
||||
push edi ecx
|
||||
|
||||
mov edi, ext2_bg_read_blk_bitmap
|
||||
xor ecx, ecx
|
||||
call ext2_resource_free
|
||||
|
||||
pop ecx edi
|
||||
ret
|
||||
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Find parent from file path in block.
|
||||
; Input: esi = file path.
|
||||
; ebx = pointer to directory block.
|
||||
; ebp = pointer to EXTFS structure.
|
||||
; Output: esi = name without parent, or not changed.
|
||||
; ebx = directory record matched.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_find_parent:
|
||||
sub esp, 256 ; Space for EXT2 filename.
|
||||
mov edx, ebx
|
||||
add edx, [ebp + EXTFS.block_size] ; Save block end.
|
||||
|
||||
.start_rec:
|
||||
cmp [ebx + EXT2_DIR_STRUC.inode], 0
|
||||
jz .next_rec
|
||||
|
||||
mov edi, esp
|
||||
push esi
|
||||
movzx ecx, [ebx + EXT2_DIR_STRUC.name_len]
|
||||
lea esi, [ebx + EXT2_DIR_STRUC.name]
|
||||
call utf8_to_cp866
|
||||
|
||||
mov ecx, edi
|
||||
lea edi, [esp + 4]
|
||||
sub ecx, edi ; Number of bytes in resulting string.
|
||||
|
||||
mov esi, [esp]
|
||||
|
||||
; esi: original file path.
|
||||
; edi: converted string stored on stack.
|
||||
; ecx: size of converted string.
|
||||
@@:
|
||||
; If no bytes left in resulting string, test it.
|
||||
jecxz .test_find
|
||||
dec ecx
|
||||
|
||||
lodsb
|
||||
call char_toupper
|
||||
|
||||
mov ah, [edi]
|
||||
inc edi
|
||||
xchg al, ah
|
||||
call char_toupper
|
||||
|
||||
; If both are same, check next byte.
|
||||
cmp al, ah
|
||||
je @B
|
||||
@@: ; Doesn't match.
|
||||
pop esi
|
||||
|
||||
.next_rec:
|
||||
movzx eax, [ebx + EXT2_DIR_STRUC.rec_len]
|
||||
add ebx, eax ; Go to next record.
|
||||
cmp ebx, edx ; Check if this is the end.
|
||||
jb .start_rec
|
||||
|
||||
add esp, 256
|
||||
ret
|
||||
|
||||
.test_find:
|
||||
cmp byte [esi], 0
|
||||
je .ret ; The end reached.
|
||||
cmp byte [esi], '/' ; If not end of directory name, not matched.
|
||||
jne @B
|
||||
inc esi
|
||||
|
||||
.ret:
|
||||
add esp, 256 + 4
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Finds free space in a directory block, modifying last entry appropriately.
|
||||
; Input: ebp = pointer to EXTFS.
|
||||
; ecx = size of free space required.
|
||||
; [EXTFS.ext2_temp_block] contains the block relevant.
|
||||
; Output: edi = free entry.
|
||||
; rec_len of free entry is set.
|
||||
; eax = error code; if the block doesn't link to the next one, this is 0x00000001 on failure.
|
||||
; ; else, 0xFFFFFFFF.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_block_find_fspace:
|
||||
push ebx edx
|
||||
|
||||
mov edi, [ebp + EXTFS.ext2_temp_block]
|
||||
mov edx, edi
|
||||
add edx, [ebp + EXTFS.block_size]
|
||||
|
||||
@@:
|
||||
movzx eax, [edi + EXT2_DIR_STRUC.rec_len]
|
||||
test eax, eax
|
||||
jz .zero_len
|
||||
|
||||
cmp [edi + EXT2_DIR_STRUC.inode], 0
|
||||
je .unused_entry
|
||||
|
||||
; It's a used entry, so see if we can fit it between current one and next.
|
||||
; Subtract the size used by the name and the structure from rec_len.
|
||||
movzx ebx, [edi + EXT2_DIR_STRUC.name_len]
|
||||
add ebx, 8 + 3
|
||||
and ebx, 0xfffffffc ; Align it on the next 4-byte boundary.
|
||||
|
||||
sub eax, ebx
|
||||
add edi, ebx
|
||||
cmp eax, ecx
|
||||
jb .next_iter
|
||||
|
||||
sub edi, ebx
|
||||
mov [edi + EXT2_DIR_STRUC.rec_len], bx ; Make previous entry point to us.
|
||||
add edi, ebx
|
||||
|
||||
mov [edi + EXT2_DIR_STRUC.rec_len], ax ; Make current entry point to next one.
|
||||
jmp .found
|
||||
|
||||
.unused_entry:
|
||||
; It's an unused inode.
|
||||
cmp eax, ecx
|
||||
jge .found
|
||||
|
||||
.next_iter:
|
||||
add edi, eax
|
||||
cmp edi, edx
|
||||
jb @B
|
||||
|
||||
.not_found:
|
||||
xor eax, eax
|
||||
not eax
|
||||
jmp .ret
|
||||
|
||||
; Zero length entry means we have the rest of the block for us.
|
||||
.zero_len:
|
||||
mov eax, edx
|
||||
sub eax, edi
|
||||
|
||||
; Point to next block.
|
||||
mov [edi + EXT2_DIR_STRUC.rec_len], ax
|
||||
|
||||
cmp eax, ecx
|
||||
jge .fits
|
||||
|
||||
mov [edi + EXT2_DIR_STRUC.inode], 0
|
||||
|
||||
; It doesn't fit, but the block doesn't link to the next block.
|
||||
xor eax, eax
|
||||
inc eax
|
||||
jmp .ret
|
||||
|
||||
.fits:
|
||||
mov [edi + EXT2_DIR_STRUC.rec_len], cx
|
||||
|
||||
.found:
|
||||
xor eax, eax
|
||||
|
||||
.ret:
|
||||
pop edx ebx
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Gets the block group's descriptor.
|
||||
; Input: eax = block group.
|
||||
; Output: eax = if zero, error; else, points to block group descriptor.
|
||||
; [EXTFS.ext2_temp_block] contains relevant block.
|
||||
; ebp = pointer to EXTFS.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_bg_read_desc:
|
||||
push edx ebx
|
||||
mov edx, 32
|
||||
mul edx ; Get index of descriptor in global_desc_table.
|
||||
|
||||
; eax: block group descriptor offset relative to global descriptor table start
|
||||
; Find the block this block descriptor is in.
|
||||
div [ebp + EXTFS.block_size]
|
||||
add eax, [ebp + EXTFS.superblock + EXT2_SB_STRUC.first_data_block]
|
||||
inc eax
|
||||
mov ebx, [ebp + EXTFS.ext2_temp_block]
|
||||
call ext2_block_read
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
add ebx, edx ; edx: local index of descriptor inside block
|
||||
mov eax, ebx
|
||||
|
||||
.return:
|
||||
pop ebx edx
|
||||
ret
|
||||
|
||||
.fail:
|
||||
xor eax, eax
|
||||
jmp .return
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Writes a block group's descriptor.
|
||||
; Input: eax = block group.
|
||||
; [EXTFS.ext2_temp_data] contains the block relevant.
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: eax = error code.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_bg_write_desc:
|
||||
push edx ebx
|
||||
mov edx, 32
|
||||
mul edx ; Get index of descriptor in global_desc_table.
|
||||
|
||||
; eax: block group descriptor offset relative to global descriptor table start
|
||||
; Find the block this block descriptor is in.
|
||||
div [ebp + EXTFS.block_size]
|
||||
add eax, [ebp + EXTFS.superblock + EXT2_SB_STRUC.first_data_block]
|
||||
inc eax
|
||||
mov ebx, [ebp + EXTFS.ext2_temp_block]
|
||||
call ext2_block_write
|
||||
|
||||
.return:
|
||||
pop ebx edx
|
||||
ret
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Gets the block group's block bitmap.
|
||||
; Input: eax = block group.
|
||||
; Output: eax = if zero, error; else, points to block group descriptor.
|
||||
; ebx = block bitmap's block (hard disk).
|
||||
;---------------------------------------------------------------------
|
||||
ext2_bg_read_blk_bitmap:
|
||||
push ecx
|
||||
|
||||
call ext2_bg_read_desc
|
||||
test eax, eax
|
||||
jz .fail
|
||||
|
||||
mov ebx, [eax + EXT2_BLOCK_GROUP_DESC.block_bitmap] ; Block number of block group bitmap - in ext2 terms.
|
||||
|
||||
.return:
|
||||
pop ecx
|
||||
ret
|
||||
|
||||
.fail:
|
||||
xor eax, eax
|
||||
jmp .return
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Updates superblock, plus backups.
|
||||
; Input: ebp = pointer to EXTFS.
|
||||
; Output: eax = error code.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_sb_update:
|
||||
push ebx
|
||||
|
||||
mov eax, 2
|
||||
lea ebx, [ebp + EXTFS.superblock]
|
||||
call fs_write32_sys
|
||||
|
||||
pop ebx
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,223 +0,0 @@
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
;; ;;
|
||||
;; Contains common resource allocation + freeing code. ;;
|
||||
;; ;;
|
||||
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
|
||||
;; Distributed under the terms of the new BSD license. ;;
|
||||
;; ;;
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Frees a resource (block/inode).
|
||||
; Input: eax = resource ID.
|
||||
; edi = function pointer of ext2_bg_*_bitmap form, to
|
||||
; get bitmap of resource.
|
||||
; ecx = 0, block; 1, inode.
|
||||
; ebp = pointer to EXTFS.
|
||||
; Output: Block marked as free in block group.
|
||||
; eax = error code.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_resource_free:
|
||||
push ebx edx esi
|
||||
|
||||
; Get block group.
|
||||
sub eax, [ebp + EXTFS.superblock + EXT2_SB_STRUC.first_data_block]
|
||||
xor edx, edx
|
||||
div [ebp + EXTFS.superblock + EXT2_SB_STRUC.blocks_per_group]
|
||||
push eax edx
|
||||
|
||||
call edi
|
||||
test eax, eax
|
||||
jz .fail
|
||||
mov esi, eax
|
||||
|
||||
; Read the bitmap.
|
||||
mov eax, ebx
|
||||
mov edx, eax
|
||||
mov ebx, [ebp + EXTFS.ext2_save_block]
|
||||
call ext2_block_read
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
pop eax
|
||||
; Mark bit free.
|
||||
call bitmap_clear_bit
|
||||
test eax, eax
|
||||
jz @F
|
||||
|
||||
; No need to save anything.
|
||||
xor eax, eax
|
||||
|
||||
add esp, 4
|
||||
jmp .return
|
||||
|
||||
@@:
|
||||
mov eax, edx
|
||||
mov ebx, [ebp + EXTFS.ext2_save_block]
|
||||
call ext2_block_write
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
; Read the descriptor.
|
||||
mov eax, [esp]
|
||||
call ext2_bg_read_desc
|
||||
test eax, eax
|
||||
jz .fail_bg_desc_read
|
||||
|
||||
lea eax, [eax + EXT2_BLOCK_GROUP_DESC.free_blocks_count]
|
||||
shl ecx, 1
|
||||
add eax, ecx
|
||||
inc word[eax]
|
||||
|
||||
lea eax, [ebp + EXTFS.superblock + EXT2_SB_STRUC.free_block_count]
|
||||
shl ecx, 1
|
||||
add eax, ecx
|
||||
inc dword[eax]
|
||||
|
||||
pop eax
|
||||
call ext2_bg_write_desc
|
||||
|
||||
.return:
|
||||
pop esi edx ebx
|
||||
ret
|
||||
|
||||
.fail:
|
||||
add esp, 4
|
||||
.fail_bg_desc_read:
|
||||
add esp, 4
|
||||
xor eax, eax
|
||||
not eax
|
||||
jmp .return
|
||||
|
||||
;---------------------------------------------------------------------
|
||||
; Allocates a resource.
|
||||
; Input: eax = inode ID for "preference".
|
||||
; ebp = pointer to EXTFS.
|
||||
; [esp + 4], func pointer to ext2_bg_*_bitmap
|
||||
; [esp + 8], pointer to free_*_count in SB.
|
||||
; [esp + 12], *_per_group
|
||||
; [esp + 16], offset to free_*_count in bg descriptor.
|
||||
; [esp + 20], *_count
|
||||
; Output: Resource marked as set in block group.
|
||||
; eax = error code.
|
||||
; ebx = resource ID.
|
||||
;---------------------------------------------------------------------
|
||||
ext2_resource_alloc:
|
||||
; Block allocation is a pretty serious area, since bad allocation
|
||||
; can lead to defragmentation. Thus, the best way to allocate that
|
||||
; comes to mind is to allocate around an inode as much as possible.
|
||||
; On the other hand, this isn't about a single inode/file/directory,
|
||||
; and focusing just around the preferred inode would lead to
|
||||
; congestion. Thus, after much though, the chosen allocation algorithm
|
||||
; is to search forward, then backward.
|
||||
push ecx edx esi edi
|
||||
|
||||
cmp dword[esp + 16 + 8], 0
|
||||
jnz @F
|
||||
|
||||
; No free blocks.
|
||||
xor eax, eax
|
||||
not eax
|
||||
pop edi esi edx ecx
|
||||
ret 20
|
||||
|
||||
@@:
|
||||
; Calculate which block group the preferred inode belongs to.
|
||||
dec eax
|
||||
xor edx, edx
|
||||
|
||||
; EAX = block group.
|
||||
div [ebp + EXTFS.superblock + EXT2_SB_STRUC.inodes_per_group]
|
||||
push eax
|
||||
push eax
|
||||
|
||||
mov edi, .forward
|
||||
|
||||
.test_block_group:
|
||||
call dword[esp + 16 + 8 + 4]
|
||||
test eax, eax
|
||||
jz .fail
|
||||
mov esi, eax
|
||||
|
||||
mov eax, ebx
|
||||
mov edx, eax
|
||||
mov ebx, [ebp + EXTFS.ext2_save_block]
|
||||
call ext2_block_read
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
mov ecx, [esp + 16 + 8 + 12]
|
||||
call ext2_find_free_bit
|
||||
cmp eax, 0xFFFFFFFF
|
||||
jne @F
|
||||
|
||||
mov eax, edi
|
||||
jmp eax
|
||||
|
||||
@@:
|
||||
mov ecx, eax
|
||||
|
||||
mov eax, edx
|
||||
mov ebx, [ebp + EXTFS.ext2_save_block]
|
||||
call ext2_block_write
|
||||
test eax, eax
|
||||
jnz .fail
|
||||
|
||||
; ecx: the index of the matched entry.
|
||||
; [esp]: block group where we found.
|
||||
; [esp + 4]: starting block group.
|
||||
; esi: block group descriptor.
|
||||
mov eax, [esp] ; Index of block group in which we found.
|
||||
mul dword[esp + 16 + 8 + 12]
|
||||
add eax, ecx
|
||||
mov ebx, eax
|
||||
|
||||
mov eax, [esp + 16 + 8 + 8]
|
||||
dec dword[eax]
|
||||
|
||||
mov eax, esi
|
||||
add eax, [esp + 16 + 8 + 16]
|
||||
dec word[eax]
|
||||
|
||||
pop eax
|
||||
call ext2_bg_write_desc
|
||||
|
||||
add esp, 4
|
||||
jmp .return
|
||||
|
||||
; Continue forward.
|
||||
.forward:
|
||||
inc dword[esp]
|
||||
mov eax, [esp]
|
||||
mul dword[esp + 16 + 8 + 12]
|
||||
cmp eax, [esp + 16 + 8 + 20]
|
||||
jbe @F
|
||||
|
||||
; We need to go backward.
|
||||
mov eax, [esp + 4]
|
||||
mov [esp], eax
|
||||
mov edi, .backward
|
||||
jmp .backward
|
||||
|
||||
@@:
|
||||
mov eax, [esp]
|
||||
jmp .test_block_group
|
||||
|
||||
; Continue backward.
|
||||
.backward:
|
||||
cmp dword[esp], 0
|
||||
je .fail
|
||||
|
||||
dec dword[esp]
|
||||
mov eax, [esp]
|
||||
jmp .test_block_group
|
||||
|
||||
.return:
|
||||
pop edi esi edx ecx
|
||||
ret 20
|
||||
|
||||
.fail:
|
||||
add esp, 8
|
||||
xor eax, eax
|
||||
not eax
|
||||
jmp .return
|
||||
Loading…
Reference in New Issue
Block a user