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From: hjl@nynexst.com (H.J. Lu)
To: gcc2@cygnus.com
Cc: gas2@cygnus.com, raeburn@cygnus.com (Ken Raeburn),
	ian@cygnus.com (Ian Lance Taylor)
Subject: comm/local/ELF/gas/gcc
Date: Mon, 27 Nov 1995 22:06:00 -0000	[thread overview]
Message-ID: <9511280605.AA10129@nynexst.com> (raw)

I am kind of confused by the asm output under x86/ELF:

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.
2. __attribute__ ((aligned (n))) doesn't do anything useful if n > 4
  for integer or 8 for double. Should a better MAX_OFILE_ALIGNMENT
  be defined for x86?
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. But I checked as on Sparc/Solaris.

	.local x.2
	.comm   x.2,4,16

and

	.comm  x.2,4,16

have the same alignment. Personally I prefer Solaris. But if most of
ELF/SVR4 as does the same as gas, I guess my opinion doesn't count
much.

I don't know what the correct fixes are. I hope:

1. Increase MAX_OFILE_ALIGNMENT for x86 to 0x1000 or somthing like that.
2. Change gas to work like Solaris.


-- 
H.J. Lu
NYNEX Science and Technology, Inc.			hjl@nynexst.com


             reply	other threads:[~1995-11-27 22:06 UTC|newest]

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

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