From: cinap_lenrek@felloff.net
To: 9fans@9fans.net
Subject: Re: [9fans] FP register usage in Plan9 assembler
Date: Mon, 1 Feb 2016 23:48:43 +0100 [thread overview]
Message-ID: <732b1707b783c57f27b9c26d5e9c0900@felloff.net> (raw)
In-Reply-To: <CAHL7psFg6JgatGw3hQb93kpkrZFGq7vtcz7eMkWWbM0cNfMGzA@mail.gmail.com>
FP is a translated to a varying offset to SP depending on where in the program
you are. arguments on the stack are padded to 8 bytes on amd64, the first argument
is not passed on the stack on function entry, but passed in BP register (RARG is an
alias for that), however the slot on the stack for first arg is still reserved
so we have a save place to splill it. so 0(FP) is first function argument on the
stack, 8(FP) second argument 16(FP) third ect...
--
cinap
next prev parent reply other threads:[~2016-02-01 22:48 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 16:47 Giacomo Tesio
2016-02-01 22:38 ` Charles Forsyth
2016-02-01 22:44 ` Charles Forsyth
2016-02-01 22:48 ` cinap_lenrek [this message]
2016-02-01 23:34 ` Giacomo Tesio
2016-02-02 0:36 ` Charles Forsyth
2016-02-02 0:58 ` Giacomo Tesio
2016-02-02 12:39 ` Aram Hăvărneanu
2016-02-02 16:42 ` Steven Stallion
2016-02-02 17:16 ` lucio
2016-02-03 15:24 ` erik quanstrom
2016-02-03 15:51 ` Steven Stallion
2016-02-03 16:36 ` erik quanstrom
2016-02-04 10:08 ` Aram Hăvărneanu
2016-02-04 12:04 ` lucio
2016-02-04 15:58 ` Ryan Gonzalez
2016-02-04 16:09 ` lucio
2016-02-04 18:06 ` Ryan Gonzalez
2016-02-04 18:14 ` balaji
2016-02-04 18:28 ` Ryan Gonzalez
2016-02-04 19:31 ` Skip Tavakkolian
2016-02-04 12:24 ` Brantley Coile
2016-02-04 12:53 ` lucio
2016-02-04 14:57 ` erik quanstrom
2016-02-04 14:05 ` Aram Hăvărneanu
2016-02-04 14:10 ` Aram Hăvărneanu
2016-02-04 14:30 ` Aram Hăvărneanu
2016-02-04 15:07 ` Charles Forsyth
2016-02-04 15:16 ` erik quanstrom
2016-02-04 15:11 ` erik quanstrom
2016-02-04 15:22 ` erik quanstrom
2016-02-04 15:26 ` Charles Forsyth
2016-02-04 20:34 ` erik quanstrom
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