Date: Thu, 21 Nov 2002 18:59:06 +0100 From: dslb@tiscali.dk To: hackers@freebsd.org Subject: Re: Assembly and ELF Message-ID: <3D9FE7F60000649D@cpfe5.be.tisc.dk>
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On 2002.11.21 18:00 Bruce M Simpson wrote: > > One big question I'd have is, why are you using assembly language? 1. I like assembly 2. FreeBSD will still need assembly programms 3. To learn more about the FreeBSD kernel (internals) I do however program in C++, so if you are worried about portability don'= t. > I use assembly language, but only where it's absolutely essential to > do > so, e.g. for interacting with the BIOS, writing firmware, or for > small > embedded targets. Jep, assembly is useful to know. > Generally you shouldn't need to worry about linking. I don't, but I would just like to know "it all". > As for stack > arguments, > the reason is that x86 is register-starved. The amount of stack > shuffling, > managing the frame pointer, and saves and so forth should serve to > illustrate > why register arguments are usually a bad idea (unless you have a > very > tight piece of code which takes less than 3 arguments) on that > architecture. Ah ok, this leads to a question I forgot to ask: That in assembly language programming will change when we get ia-64? > Also, you do know that executing an INT causes standard exception > processing through a call gate anyway, right? Yes, so it is all in the kernel and thereby in the ram? Sorry of all these questions, but I am relativly new to Unix (FreeBSD sin= ce 4.5) and I am only (just turned) 21, so it is just now I've begon program= ming and such. br socketd To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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