Yup, "call dword " will be fixed by PE loader, "call imm32" (relative) won't.


Simply, it seems to me very strange -- we can use 100 'call rel32' (relative) to one 'jmp' -- PE loader will correct only 1 jmp. If we have 100 'call ' -- loader must complete 100 corrections. But, this is more rhetorical question, I think.

Thank you all for answers and patience!
Posted on 2006-04-21 13:29:55 by Mika0x65
well, in most situations you image won't be rebased and the relocations won't have to take place. There isn't really much reason to use one approach over the other - except that "call rel32" will not need a fixup, and will be a tiny smaller if you call the API many times. The speed difference between the two is almost nonexisting, and if becomes a problem - you're structured your code wrong :)
Posted on 2006-04-21 13:36:15 by f0dder
All in all a very good thread f0dder and Mika0x65, not something that I have ever looked into in any depth but I have learned a bit while exploring the answer, thanks :thumbsup:
Posted on 2006-04-21 20:30:18 by donkey