Release of RosAsm V.2.025a
in [ASM]
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From: randyhyde@earthlink.net on 29 Sep 2005 14:17 Herbert Kleebauer wrote: > > My brain is to small to understand a "multiverse". Everyone's brain is too small to even comprehend the number of states possible in an x86 system. Combined with the fact that there is not a one-to-one mapping of programs to binary object files, this is why it's fair to say that writing a perfect disassembler is an impossibility. Cheers, Randy Hyde
From: wolfgang kern on 29 Sep 2005 17:53 <randyhyde(a)earthlink.net> described his limits: | Herbert Kleebauer wrote: | > | > My brain is to small to understand a "multiverse". | | Everyone's brain is too small to even comprehend the number of states | possible in an x86 system. Combined with the fact that there is not a | one-to-one mapping of programs to binary object files, this is why it's | fair to say that writing a perfect disassembler is an impossibility. Nope, not everyone's brain work like yours. Perhaps it is valid for your brain, but all possible instructions on x86 in 16/32/64-bit-modes and all mixed variants are in 'my' brain already. __ wolfgang
From: randyhyde@earthlink.net on 29 Sep 2005 19:38 wolfgang kern wrote: > > Nope, not everyone's brain work like yours. > Perhaps it is valid for your brain, but all possible instructions on > x86 in 16/32/64-bit-modes and all mixed variants are in 'my' brain already. > __ > wolfgang I guess you don't understand the difference between a machine "state" and a machine instruction. Oh well. Cheers, Randy Hyde
From: wolfgang kern on 30 Sep 2005 15:31 <randyhyde(a)earthlink.net> wrote: | > Nope, not everyone's brain work like yours. | > Perhaps it is valid for your brain, but all possible instructions on | > x86 in 16/32/64-bit-modes and all mixed variants are in 'my' brain | > already. | I guess you don't understand the difference between a machine "state" | and a machine instruction. Oh well. You can ask me for every single flag bit or what's in thea TSS or whatsoever you like to know about IA-32 and AMD64 hardware, even when I'm in deep sleep, and be sure to get a correct answer, even it may be followed by a very nasty curse then. __ wolfgang
From: randyhyde@earthlink.net on 30 Sep 2005 19:40
wolfgang kern wrote: > <randyhyde(a)earthlink.net> wrote: > > | > Nope, not everyone's brain work like yours. > | > Perhaps it is valid for your brain, but all possible instructions on > | > x86 in 16/32/64-bit-modes and all mixed variants are in 'my' brain > | > already. > > | I guess you don't understand the difference between a machine "state" > | and a machine instruction. Oh well. > > You can ask me for every single flag bit or what's in thea TSS or whatsoever > you like to know about IA-32 and AMD64 hardware, even when I'm in deep sleep, > and be sure to get a correct answer, even it may be followed by a very > nasty curse then. > > __ > wolfgang I guess you don't understand what a machine "state" is. I'd suggest you study automata theory sometime. Then, perhaps, you'd understand what is meant by the phrase "machine state". I'll give you a quick hint with regard to the x86, though. If you take *all* the possible bits in a hypothetically maxed-out x86 system (including all secondary storage, registers, memory, and anything else that can be set one way or the other), then one configuration (that is, bit pattern) of all these bits is *one* state of the machine. Now raise two to the power specified by this number of bits and that the number of possible states in the system. This is a *very* large number. Far beyond the comprehension of any human being (or even all human beings combined) to comprehend. Indeed, if every elementary particle in the universe were able to record one of these states, there are still far, far, too many states to store (IIRC, the size of the universe is somewhere around 10^78 particles or so, far less than the two to this very huge number). So, Wolfgang: no, there is no way you could possibly even imagine all the states that are possible to create with an x86 system. Cheers, Randy Hyde |