1594,7 → 1594,16 |
.common1: |
call fat_find_lfn |
jc .notfound |
; found, delete FAT chain |
; found; must not be directory |
test byte [edi+11], 10h |
jz @f |
add esp, 28 |
popad |
mov eax, ERROR_ACCESS_DENIED |
xor ebx, ebx |
ret |
@@: |
; delete FAT chain |
push edi |
xor eax, eax |
mov dword [edi+28], eax ; zero size |
1960,4 → 1969,106 |
@@: |
ret |
|
;---------------------------------------------------------------- |
; |
; fs_FloppyExecute - LFN variant for executing from floppy |
; |
; esi points to floppy filename (e.g. 'dir1/name') |
; ebp points to full filename (e.g. '/fd/1/dir1/name') |
; dword [ebx] = flags |
; dword [ebx+4] = cmdline |
; |
; ret ebx,edx destroyed |
; eax > 0 - PID, < 0 - error |
; |
;-------------------------------------------------------------- |
fs_FloppyExecute: |
mov edx, [ebx] |
mov ebx, [ebx+4] |
test ebx, ebx |
jz @f |
add ebx, std_application_base_address |
@@: |
|
;---------------------------------------------------------------- |
; |
; fs_FloppyExecute.flags - second entry |
; |
; esi points to floppy filename (kernel address) |
; ebp points to full filename |
; edx flags |
; ebx cmdline (kernel address) |
; |
; ret eax > 0 - PID, < 0 - error |
; |
;-------------------------------------------------------------- |
|
.flags: |
call read_flp_fat |
cmp byte [esi], 0 |
jnz @f |
; cannot execute root! |
mov eax, -ERROR_ACCESS_DENIED |
ret |
@@: |
push edi |
call fd_find_lfn |
jnc .found |
pop edi |
mov eax, -ERROR_FILE_NOT_FOUND |
ret |
.found: |
movzx eax, word [edi+26] ; cluster |
push eax |
push dword [edi+28] ; size |
push .DoRead |
call fs_execute |
add esp, 12 |
pop edi |
ret |
|
.DoRead: |
; read next block |
; in: eax->parameters, edi->buffer |
; out: eax = error code |
pushad |
cmp dword [eax], 0 ; file size |
jz .eof |
mov eax, [eax+4] ; cluster |
add eax, 31 |
call read_chs_sector |
cmp [FDC_Status], 0 |
jnz .err |
pop edi |
mov esi, 0xD000 |
push edi |
mov ecx, 512/4 |
rep movsd |
mov eax, [esp+28] |
mov ecx, [eax] |
sub ecx, 512 |
jae @f |
add edi, ecx |
neg ecx |
push eax |
xor eax, eax |
rep stosb |
pop eax |
@@: |
mov [eax], ecx |
mov edx, [eax+4] |
mov dx, [edx*2+0x282000] |
mov [eax+4], dx ; high word is already zero |
popad |
xor eax, eax |
ret |
.eof: |
popad |
mov eax, 6 |
ret |
.err: |
popad |
mov eax, 11 |
ret |
|
; \end{diamond} |