Date: Fri, 04 Jan 2008 17:25:44 -0500 From: Lyle Miller <lm101ml@bellsouth.net> To: freebsd-amd64 <freebsd-amd64@freebsd.org> Subject: Re: how do i write assembly code in amd64 Message-ID: <477EB268.2090403@bellsouth.net> In-Reply-To: <20080104210751.GA18913@dragon.NUXI.org> References: <d38327e0712221956t7b7ead72xda3f65e15a23b1a@mail.gmail.com> <Pine.LNX.4.64.0712222028270.32093@knuth.cs.hmc.edu> <20080104210751.GA18913@dragon.NUXI.org>
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David O'Brien wrote: > 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/. > > look at some of the freebsd www documentation - handbooks and articles: freebsd developers handbook? freebsd architecture handbook? look at the under developers -> platforms -> amd64 project from www.freebsd.org. look at some of the freebsd asm coding in the source tree: cd /usr/src/sys find . -name '*.[s|S]' -print | grep amd64
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