comm/local/ELF/gas/gcc
Ian Lance Taylor
ian@cygnus.com
Tue Nov 28 08:55:00 GMT 1995
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
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