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Re: [patch] MIPS gas problems with gcc's explicit relocs
At Fri, 4 Jun 2004 15:54:22 +0000 (UTC), "Eric Christopher" wrote:
> > - Work around the problem by not using "m" constraints for (d)la in
> > the inline assembler, that is instead of
> >
> > asm("dla\t%0,%1" : "=r" (result) : "m" (foo));
> >
> > something like
> >
> > asm("dla\t%0,foo" : "=r" (result));
>
> I like this I think the most. It fits with what people are trying to do
> with the la instruction, i.e. load an address for a symbol that they
> know.
FWIW, I don't think using 'dla' or 'la' in this way is a great idea,
but...
assuming there are no other references to 'foo' in the file, this can
lose w/ unit-at-a-time compilation (e.g., if 'foo' is a static data
object). Need to reference 'foo' from C code.
Also, historically speaking, putting 'foo' in the asm might have been
a bad idea, because of of the question of underscores or not at the
start of C symbols. Nicer to let the compiler take care of it for
you. (not clear that this matters today, though.)
chris