Hello Shashi! you might wanna take a look at the argos [0] project. they do exactly that kind of stuff. we implemented something quite similar as the base of my masters thesis a technical report is available at [1] although what you need is only covered in a single chapter.
btw. i found it to be easier to make the changes in translate.c instead of changing every op in op.c cheers m. [0] http://www.few.vu.nl/argos/ [1] http://seclab.tuwien.ac.at/papers/tqana.pdf Am Mittwoch, den 25.04.2007, 01:16 -0700 schrieb Shashidhar Mysore: > Hi, > > I am trying to incorporate into QEMU (x86) some structures to maintain > integrity of data that flows in the processor. Specifically, I want to > maintain a bit for every physical memory address and transfer the > state information for every address along onto the virtual memory, and > also down to the instructions which operate on data, and bit arrays > for registers (so that when an operand is fetched from a particular > register, we also have the state information for that register). I am > trying to build a Minos type architecture > ( http://minos.cs.ucdavis.edu/) but in QEMU instead of Bochs. > > For this, as far as I can see, I need to maintain a set of new > structures to shadow the physical memory and make changes to the micro > ops defined in target-i386/op.c so that every instruction can track > the state and store them for every register used as an operand. I'm > not sure if somebody has already implemented such a system on QEMU? I > am just beginning to think and work on this, so any > pointers/suggestions would be greatly appreciated. Please let me know > your views on this. > > Thanks, > -Shashi.
