[bug?] Unsized structure offsets load without error.

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revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20617
Location: In your JS exploiting you and your system

revolution 04 May 2009, 03:37

See here for some history:

Code:

include 'macro\struct.inc'
use32

struct TestStruct1
   Key1  rq 1           ;<-- a quad word for testing
ends

struct TestStruct2
   Key2  TestStruct1
ends

        mov     ebx,[ebx+TestStruct2.Key2]      ; shouldn't work?

We loaded a dword from a quad word pointer? I'm not sure if this is a bug, but it feels a bit bad so I report it here to see if this is a problem that needs fixing.

04 May 2009, 03:37

bitRAKE

Joined: 21 Jul 2003
Posts: 4224
Location: vpcmpistri

bitRAKE 04 May 2009, 08:43

Key2 is TestStruct1, so it doesn't appear to be a bug, imho. Has a struct ever been an alias for the first member?

04 May 2009, 08:43

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