GET_LENGTH_INFORMATION structure

[azdps]

I'm having a problem with the GET_LENGTH_INFORMATION structure. I get the following 2 errors when assembling:

error A2138: invalid data initializer
error A2036: too many initial values for structure

I found a link to the microsoft website which describes the error's I'm getting
http://support.microsoft.com/kb/94912

Any recommendations would be great. Here is the code I have been working with:

Code Select Expand

.586
.model flat, stdcall
option casemap: none

     include         /masm32/include/windows.inc
     include         /masm32/include/kernel32.inc
     include         /masm32/include/user32.inc
     include         /masm32/include/comctl32.inc
     include         /masm32/include/masm32.inc
     include         /masm32/include/debug.inc
     include         /masm32/include/Setupapi.inc

   
     includelib      /masm32/lib/kernel32.lib
     includelib      /masm32/lib/user32.lib
     includelib      /masm32/lib/comctl32.lib
     includelib      /masm32/lib/masm32.lib
     includelib      /masm32/lib/debug.lib
     includelib      /masm32/lib/Setupapi.lib

     
     GET_LENGTH_INFORMATION struct
      iLength            LARGE_INTEGER <>
     GET_LENGTH_INFORMATION ends

     IOCTL_DISK_GET_LENGTH_INFO equ 2D005Ch
     
.data
     DrivePath db "C:\",0

.data?
     hDrive           HANDLE ?
     cbReturned       dd ?
     len              GET_LENGTH_INFORMATION <?>

.code
start:

     invoke CreateFile,addr DrivePath,FILE_LIST_DIRECTORY,FILE_SHARE_READ + FILE_SHARE_WRITE,0,OPEN_EXISTING,0,0
     mov hDrive,eax
   
     invoke DeviceIoControl,hDrive,IOCTL_DISK_GET_LENGTH_INFO, 0,0,addr len, sizeof GET_LENGTH_INFORMATION, addr cbReturned, 0
   
     invoke CloseHandle,hDrive
     invoke ExitProcess,0

end start
[/size]

[MichaelW]

Try:

len  GET_LENGTH_INFORMATION <>

[donkey]

or try:

len DQ ?

A LARGE_INTEGER structure is just a qword or a union of 2 dwords but in both cases it resolves to a qword.

[dedndave]

it's a nested structure inside a structure   :P

Code Select Expand

     len              GET_LENGTH_INFORMATION <<?>>
or

Code Select Expand

     len              GET_LENGTH_INFORMATION <<<?,?>>>

i think either of those will work
Michael's way is easier   :bg
Edgar is also right

the way i handle simple stuff like this is...

Code Select Expand

lenQ    LABEL   QWORD
lenL    dd ?
lenH    dd ?

then, you can grab the QWORD with lenQ

[azdps]

Wasnt able to get it to work for some reason. DeviceIOControl fails.

[MichaelW]

To get an idea of why it's failing, call the GetLastError function and check the error code that it returns. Another alternative is the MASM32 LastError$() macro, which will get the last error-code value and return the offset address of a system-defined error string. Depending on your app, you can then either display the string with the print macro or in a message box.

[lingo]

"i think either of those will work
Michael's way is easier   
Edgar is also right"

Wrong! :lol
try  with
-  IOCTL_DISK_GET_LENGTH_INFO equ 7405Ch
-  DrivePath db "\\.\C:",0

- len  db  24 Dup(0)

and

invoke DeviceIoControl,hDrive,IOCTL_DISK_GET_LENGTH_INFO, 0,0,addr len, sizeof len, addr cbReturned, 0

[dedndave]

obviously, you took my statement out of context, ***offending content removed***

[PBrennick]

Dave,
Maybe I'll go away for another couple of years if language such as that has become acceptable.

Paul

[oex]

fucking moron

:lol Couldnt help but laugh

[jj2007]

obviously, you took my statement out of context, fucking moron

Dave, really :naughty:

Rumpelstilzchen is still the fastest assembly coder in Toronto, and produces the nicest GPFs in town :P

[lingo]

"The Campus
A protected forum where programmers learning assembler can ask questions in a sensible and safe atmosphere without being harassed or insulted."

Super protection from the forum's idiots!!! :lol

[BogdanOntanu]

Indeed Dave... what happened to your good manners ?

Please avoid this kind of statements  :D

[sinsi]

With lingo's corrections the code works fine but only if run as administrator (win7 pro x64). I would imagine that vista would also require admin.

[hutch--]

 :bg

Now now kiddies, you have to be an Australian to know how to use naughty words in a consistent manner.