Comments on: Reapplying the Decal: The practical application of theory http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory Implicit Definition Thu, 01 Apr 2010 13:52:30 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Paul http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-445 Paul Thu, 25 Aug 2005 10:36:48 +0000 http://www.archgrove.co.uk/?p=51#comment-445 Hi all, If anyone's interested, the objdump tool from the GNU toolchain can be used to generate assembly: objdump -d helloWorld.exe > helloWorld.asm Produces quite nicely formatted stuff, too. Assuming most of the people here are running in Windows, you can get the GNU tools by installing Cygwin (http://www.cygwin.com/) Hi all,

If anyone’s interested, the objdump tool from the GNU toolchain can be used to generate assembly:

objdump -d helloWorld.exe > helloWorld.asm

Produces quite nicely formatted stuff, too.

Assuming most of the people here are running in Windows, you can get the GNU tools by installing Cygwin (http://www.cygwin.com/)

]]> By: Jungalist http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-443 Jungalist Tue, 23 Aug 2005 17:34:57 +0000 http://www.archgrove.co.uk/?p=51#comment-443 Well, I tried it out too. I got the first two questions with no trouble but I kind of fell apart after that. Great articles though, I just found them today and am getting nothing done at work because I've read them all! Well, I tried it out too. I got the first two questions with no trouble but I kind of fell apart after that. Great articles though, I just found them today and am getting nothing done at work because I’ve read them all!

]]> By: Long Duk Bill http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-440 Long Duk Bill Mon, 22 Aug 2005 21:23:39 +0000 http://www.archgrove.co.uk/?p=51#comment-440 Ahh, Ok Portaren. I just ran thru it with a cheapie compiler I had laying around, and it compiles and runs just fine. Like I said, my C++ is RUSTY! :) Ahh, Ok Portaren. I just ran thru it with a cheapie compiler I had laying around, and it compiles and runs just fine. Like I said, my C++ is RUSTY! :)

]]> By: Archgrove - Implicit Definition » Reapplying the Decal: The surviving stumble to victory! (The weblog of Adam Wright) http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-438 Archgrove - Implicit Definition » Reapplying the Decal: The surviving stumble to victory! (The weblog of Adam Wright) Fri, 19 Aug 2005 14:25:09 +0000 http://www.archgrove.co.uk/?p=51#comment-438 [...] Well, there was a total of 2 received answers to the questions in the last part which, whilst somewhat less than I hoped, just makes it more of an achievement to those that tried. I’m sure lots of you are sitting at home using your solutions as some form of abstract modern art, rather than wasting them on this site, and you’re right to do so! [...] [...] Well, there was a total of 2 received answers to the questions in the last part which, whilst somewhat less than I hoped, just makes it more of an achievement to those that tried. I’m sure lots of you are sitting at home using your solutions as some form of abstract modern art, rather than wasting them on this site, and you’re right to do so! [...]

]]> By: Portaren http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-436 Portaren Tue, 16 Aug 2005 22:52:57 +0000 http://www.archgrove.co.uk/?p=51#comment-436 Long Duk Bill, it does certainly look like it lost my class name, but that's because I'm using an anonymous class, since I only need the one object out of it, HelloWorldPrinter. If you want, you could call it HelloWorldPrinterClass. It compiles and runs either way and the executables my compiler gives me are only 2-3 bytes different, and those bytes vary even if I compile the same code again, so I think it's a datestamp or some such. Long Duk Bill, it does certainly look like it lost my class name, but that’s because I’m using an anonymous class, since I only need the one object out of it, HelloWorldPrinter. If you want, you could call it HelloWorldPrinterClass.
It compiles and runs either way and the executables my compiler gives me are only 2-3 bytes different, and those bytes vary even if I compile the same code again, so I think it’s a datestamp or some such.

]]> By: Adam Wright http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-435 Adam Wright Tue, 16 Aug 2005 18:17:01 +0000 http://www.archgrove.co.uk/?p=51#comment-435 Thanks for the kind words! I accept the point that I didn’t give any instructions on how to generate the assembly. I did this deliberately, as the only way I can guarantee that people are seeing exactly what I expect is to just give it to them directly. Additionally, the tools I used are only available (as far as I know) from the Microsoft Visual Studio suite, something most people won’t have. However, for those who want to replicate exactly what I did to generate the listing, find “dumpbin.exe” in your VS install, with execute it on the “helloWorld.exe” file with “/disasm”. The generated code was truncated and reformatted a touch for clarity in my article, but the output should be close to identical. You can, of course, use any other disassembler (for example, IDA), but the format of the output will likely be different. I’ll put of a complete list of tools I used in the “solutions” article. Thanks for the kind words! I accept the point that I didn’t give any instructions on how to generate the assembly. I did this deliberately, as the only way I can guarantee that people are seeing exactly what I expect is to just give it to them directly. Additionally, the tools I used are only available (as far as I know) from the Microsoft Visual Studio suite, something most people won’t have.

However, for those who want to replicate exactly what I did to generate the listing, find “dumpbin.exe” in your VS install, with execute it on the “helloWorld.exe” file with “/disasm”. The generated code was truncated and reformatted a touch for clarity in my article, but the output should be close to identical. You can, of course, use any other disassembler (for example, IDA), but the format of the output will likely be different.

I’ll put of a complete list of tools I used in the “solutions” article.

]]> By: Long Duk Bill http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-434 Long Duk Bill Tue, 16 Aug 2005 17:47:36 +0000 http://www.archgrove.co.uk/?p=51#comment-434 Oh, another fun little thing to do by strictly editing the executable... Make the program output "Bite Me World", using only a hex editor. Not quite as trivial as it sounds. A calculator that does hex math is very useful for this one, btw. Oh, another fun little thing to do by strictly editing the executable…

Make the program output “Bite Me World”, using only a hex editor. Not quite as trivial as it sounds. A calculator that does hex math is very useful for this one, btw.

]]> By: Long Duk Bill http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-433 Long Duk Bill Tue, 16 Aug 2005 16:10:36 +0000 http://www.archgrove.co.uk/?p=51#comment-433 Oh, Portaren, it also didn't copy the name of your class over, either, in the declaration. Oh, Portaren, it also didn’t copy the name of your class over, either, in the declaration.

]]> By: Long Duk Bill http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-432 Long Duk Bill Tue, 16 Aug 2005 15:36:49 +0000 http://www.archgrove.co.uk/?p=51#comment-432 Great series. I haven't done any decompiling since TRS-80 Model 4's were state-of-the-art ... ok, I'm dating myself. And the last comment was a good one, too. What decompiler are you using? Hex editors don't create an Assembly output. It'd be kinda nice to be able to play along with you without having to be spoon fed some vital intel (i.e. the actual assembly code) Oh, as for the answers, I did the exact same thing Portaren did for the first 2, came up with the same answer for #3, didn't play with #4, and my C++ is so rusty for #5 that I figured I'd just be lazy and see who had the best response to date :D (I'm old, I'm allowed :D ) Great series. I haven’t done any decompiling since TRS-80 Model 4′s were state-of-the-art … ok, I’m dating myself. And the last comment was a good one, too. What decompiler are you using? Hex editors don’t create an Assembly output. It’d be kinda nice to be able to play along with you without having to be spoon fed some vital intel (i.e. the actual assembly code)

Oh, as for the answers, I did the exact same thing Portaren did for the first 2, came up with the same answer for #3, didn’t play with #4, and my C++ is so rusty for #5 that I figured I’d just be lazy and see who had the best response to date :D (I’m old, I’m allowed :D )

]]> By: Ashida Kim http://www.archgrove.co.uk/weblog/2005/08/13/reapplying-the-decal-the-practical-application-of-theory/comment-page-1#comment-431 Ashida Kim Tue, 16 Aug 2005 14:19:18 +0000 http://www.archgrove.co.uk/?p=51#comment-431 Ok, maybe I missed something, I have known to be absurdly blind sometimes. What did you use to generate the big list in this article? Was it a decompiler? If so, can you recommend a freeware one? Ok, maybe I missed something, I have known to be absurdly blind sometimes. What did you use to generate the big list in this article? Was it a decompiler? If so, can you recommend a freeware one?

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