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;----------------------------------------------------------------

;

;  fs_CdExecute - LFN variant for executing from CD

;

;  esi  points to hd filename (e.g. 'dir1/name')

;  ebp  points to full filename (e.g. '/hd0/1/dir1/name')

;  dword [ebx] = flags

;  dword [ebx+4] = cmdline

;

;  ret ebx,edx destroyed

;      eax > 0 - PID, < 0 - error

;

;--------------------------------------------------------------

fs_CdExecute:

        mov     edx, [ebx]

        mov     ebx, [ebx+4]

        test    ebx, ebx

        jz      @f

        add     ebx, std_application_base_address

@@:

;----------------------------------------------------------------

;

; fs_CdExecute.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:

        cmp     byte [esi], 0

        jnz     @f

; cannot execute root!

        mov     eax, -ERROR_ACCESS_DENIED

        ret

@@:

        push    edi

        call    cd_find_lfn

        jnc     .found

        pop     edi

        mov     eax, -ERROR_FILE_NOT_FOUND

        cmp     [DevErrorCode], 0

        jz      @f

        mov     al, -11

@@:

        ret

.found:

        mov     edi,[cd_current_pointer_of_input]

        mov    eax,[edi+2]

        push    0

        push    eax

        push    dword [edi+10]          ; size

        push    .DoRead

        call    fs_execute

        add     esp, 16

        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

        cmp     [eax+8],dword 0

        jne     @f

        mov     ecx,[eax+4]

        inc     dword [eax+4] 

        mov     [CDSectorAddress],ecx

        mov     [CDDataBuf_pointer],CDDataBuf  ;edi

        call    ReadCDWRetr

        cmp     [DevErrorCode], 0

        jnz     .err

@@:

        push    esi edi ecx

        mov     esi,512

        imul    esi,[eax+8]

        add     esi,CDDataBuf  

        mov     ecx,512/4

        cld

        rep     movsd

        pop     ecx edi esi

        mov     eax, [esp+28]

        mov     ecx, [eax]

        sub     ecx, 512

        jae     @f

        lea     edi, [edi+ecx+512]

        neg     ecx

        push    eax

        xor     eax, eax

        rep     stosb

        pop     eax

@@:

        mov     [eax], ecx

        mov     edx, [eax+8]

        inc     edx

        cmp     edx, 4  ; 2048/512=4

        jb      @f

        xor     edx, edx

@@:

        mov     [eax+8], edx

        popad

        xor     eax, eax

        ret

.eof:

        popad

        mov     eax, 6

        ret

.err:

        popad

        mov     eax, 11

        ret