Hi. I recently built a new machine and was working on an assembler project on my old one. I did the usual, code, assemble, debug using olly but now I have this new machine which has xp 64 bit on it and olly is behaving oddly. I imagine things like pe headers and general architecture are different in 64 but os but is this what's throwing olly off? What's happening is i open my proggy in olly and it's entry point seems a very far jump away from the main proggy. I step through and end up in code i recognize. I set a breakpoint to somewhere i know my programme does reach but it never gets there. It stops at a single step event and event it won't let me pass to the programme. I can step but it just seems to go round in circles and nowhere near my own code. What's going on?
Thanks.
OllyDbg does not yet support 64 bit OSes.
You need a new disassembly engine in 64bits, and a new heuristic engine. Besides the Windows debug API is closely related to the machine architecture. Hence Olly has serious problems under those circumstances.
It is a wonder if anything works. If it works it is probably just "apparently working"
There are other 64 bits debuggers and maybe in the future Olly will be enabled for 64bits also.
For now you will have to seek and use other debuggers for 64bits.
Quote from: BogdanOntanu on November 08, 2007, 08:05:25 AM
OllyDbg does not yet support 64 bit OSes.
You need a new disassembly engine in 64bits, and a new heuristic engine. Besides the Windows debug API is closely related to the machine architecture. Hence Olly has serious problems under those circumstances.
It is a wonder if anything works. If it works it is probably just "apparently working"
There are other 64 bits debuggers and maybe in the future Olly will be enabled for 64bits also.
For now you will have to seek and use other debuggers for 64bits.
I was thinking that the 64 bit os runs 32 bit through some sort of emulations and olly was trying to debug the emulator. Just a thought.
Not the end of the world. I can improvise. :)
Install Debugging Tools for Windows 64-bit Version :
http://www.microsoft.com/whdc/devtools/debugging/install64bit.mspx