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From: John Farmer <news02@lavabit.com>
To: gcc-help@gcc.gnu.org
Subject: Re: Register Usage
Date: Tue, 28 Apr 2009 22:06:00 -0000	[thread overview]
Message-ID: <23287035.post@talk.nabble.com> (raw)
In-Reply-To: <m363go205k.fsf@google.com>


Hi Ian thanks for the reply,

I had a good look through the ARM-THUMB Procedure Call Standard and it sort
of suggests that R7 could be used as a frame pointer. Looked through the GCC
docs and found the -fabi option but it appears to apply to C++ code.

I am still wondering what makes the decision to use R7 as the frame pointer.
If its used because of an ABI standard for the ARM Cortex-M3 CPU how is it
specified to GCC? Also if this is the case is there a standard that I could
look through? I have looked on the ARM web site but not found it yet.

Regards John

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  reply	other threads:[~2009-04-28 22:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-28 16:06 John Farmer
2009-04-28 16:50 ` Ian Lance Taylor
2009-04-28 22:06   ` John Farmer [this message]
2009-04-29  0:27     ` Ian Lance Taylor
2009-04-29  7:57       ` John Farmer
2009-04-29  9:27     ` Richard Earnshaw
2009-04-29 10:18       ` John Farmer
2009-04-29 10:38         ` Richard Earnshaw
2009-04-29 12:14           ` John Farmer
2009-04-29 13:34             ` Richard Earnshaw
  -- strict thread matches above, loose matches on Subject: below --
2006-07-12  1:27 gcc binary format output Victor Roman Archidona
2006-07-12  4:39 ` Ian Lance Taylor
2006-07-12  5:35   ` Victor Roman Archidona
2006-07-12  5:57     ` Ian Lance Taylor
2006-07-12  8:58       ` register usage Petar Bajic
2006-07-12 12:48         ` Andrew Haley
2006-07-13 12:33           ` Petar Bajic
2006-07-13 12:45             ` Andrew Haley

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