From: David Gordon Hogan <dhog@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] partial-Plan9ification question
Date: Fri, 13 Jul 2001 02:23:32 -0400 [thread overview]
Message-ID: <20010713062335.4AFC3199C0@mail.cse.psu.edu> (raw)
> gcc varies between architectures, and even from platform to platform,
> but i think even on the x86 with hardly any registers, some registers are callee-saved.
ebx, esi and edi are callee save under GCC. ebp is the frame pointer, so
that one gets preserved too (I've no idea what happens if you compile with
-fomit-frame-pointer).
This means that in the Plan 9 port of GCC, the system call wrappers
have to push these four registers, then push copies of all the arguments...
next reply other threads:[~2001-07-13 6:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-13 6:23 David Gordon Hogan [this message]
2001-07-13 18:26 ` Rick Hohensee
-- strict thread matches above, loose matches on Subject: below --
2001-07-13 22:34 David Gordon Hogan
2001-07-13 19:15 David Gordon Hogan
2001-07-13 18:08 brucee
2001-07-13 18:37 ` Rick Hohensee
2001-07-13 6:39 David Gordon Hogan
2001-07-13 5:53 forsyth
2001-07-13 6:26 ` Mike Haertel
2001-07-12 22:16 Rick Hohensee
2001-07-12 22:18 ` Boyd Roberts
2001-07-13 1:55 ` Rick Hohensee
2001-07-12 22:08 David Gordon Hogan
2001-07-13 1:27 ` Rick Hohensee
2001-07-13 14:53 ` Douglas A. Gwyn
2001-07-13 22:18 ` Dan Cross
2001-07-14 1:21 ` Boyd Roberts
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