Re: [Nvda-dev] Rev 3385: nvdaHelper API hooking implementation: in http://bzr.nvaccess.org/nvda/nvdaHelperAPIHooks

[Lex <le...@pr...>]

Hi.

27.02.2010 10:52, Michael Curran пишет:
> Its possible that we can't use this stuff as the dll names must match 
> or something, though I'm not sure, I havn't seen anything say that yet.
I am afraid we can't. Quote ffrom the article:
• There's no public tool (special version of C compiler, linker?) for 
creating the cold/hotpatches. It is possible to write a tool that will 
add/write to '.hotp1 ' section of image created by normal 
compiling/linking but there are 2 problems:
• How to write the new function with instructions pointing to target 
module and with this conjuncted
• Fixup handling. Anyway, one doesn't have to use the target module 
functions/data so there's no need for the hotpatch fixups.

If I understand correctly, we will be not able to call original function.
So the best approach I can come with which iwll work on x64 is to take 
one of available codebases (minhook looks most promising since it is 
light-weight and not an overcome as easyhook is) and integrate it. What 
disadvantages do you see?