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From: Ian Lance Taylor <ian@cygnus.com>
To: hjl@nynexst.com
Cc: gcc2@cygnus.com, gas2@cygnus.com, raeburn@cygnus.com
Subject: Re: comm/local/ELF/gas/gcc
Date: Tue, 28 Nov 1995 08:55:00 -0000	[thread overview]
Message-ID: <199511281655.LAA06540@sanguine.cygnus.com> (raw)
In-Reply-To: <9511280605.AA10129@nynexst.com>

   From: hjl@nynexst.com (H.J. Lu)
   Date: Tue, 28 Nov 95 1:05:35 EST

   1. There is a limit of MAX_OFILE_ALIGNMENT in bits for maximum alignment.
      But it only applies to symbols in data, not those in bss/common.

The problem would appear to be that gcc defaults to value of
MAX_OFILE_ALIGNMENT to BIGGEST_ALIGNMENT.  For the i386,
BIGGEST_ALIGNMENT is 32 or 64.  It would be reasonable for
config/svr4.h in gcc to set MAX_OFILE_ALIGNMENT to 0x80000000.
However, I don't know what the consequences are of requesting an
alignment larger than BIGGEST_ALIGNMENT.  Is that supposed to work or
not?

   3. The x86/ELF gas is kind of strange:

	   .local x.2
	   .comm   x.2,4,4

   and

	   .comm  x.2,4,16

   mean the same alignment.

This was a gas bug.  It is fixed in the 2.6 release.

Ian


      reply	other threads:[~1995-11-28  8:55 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1995-11-27 22:06 comm/local/ELF/gas/gcc H.J. Lu
1995-11-28  8:55 ` Ian Lance Taylor [this message]

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