Date: Fri, 4 Jan 2008 13:07:51 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Nate Eldredge <nge@cs.hmc.edu> Cc: freebsd-amd64@freebsd.org Subject: Re: how do i write assembly code in amd64 Message-ID: <20080104210751.GA18913@dragon.NUXI.org> In-Reply-To: <Pine.LNX.4.64.0712222028270.32093@knuth.cs.hmc.edu> References: <d38327e0712221956t7b7ead72xda3f65e15a23b1a@mail.gmail.com> <Pine.LNX.4.64.0712222028270.32093@knuth.cs.hmc.edu>
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On Sat, Dec 22, 2007 at 08:29:46PM -0800, Nate Eldredge wrote: > On Sun, 23 Dec 2007, zhang feng wrote: >> i write asm32 code in linux.when i run the code in freebsd amd64, it >> cannt run. someone give me a help for coding asm64 in freebsd. > > amd64 has a whole different instruction set than 32-bit x86, Not true at all. 97% of the instructions are the same. What is different is the operand size and the C calling ABI. For the most part, code can be port by simple s/%e/%r/. -- -- David (obrien@FreeBSD.org)
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