Home Original page

[patch] MIPS gas problems with gcc's explicit relocs

Richard Sandiford rsandifo@redhat.com
Sat May 29 06:39:00 GMT 2004 
Hi Maciej,

"Maciej W. Rozycki" <macro@ds2.pg.gda.pl> writes:
>  The recent addition of explicit relocation generation to gcc triggered 
> failures for inline assembly under certain conditions.

Thanks for sticking up for the new gcc behaviour ;).

I just wanted to point out that using %lo(...) in "m" constraints
isn't in itself a new thing.  And that includes "m" constraints in
inline asms, since gcc doesn't treat them any differently from "m"
constraints in its own internal patterns.  For example, if you
select non-abicalls o32 or o64 code, I think it's been possible
for "m" to use %lo(...) for some time.  (Unless of course you
disabled it via -mno-split-addresses.)

If allowing %lo(...) in dla isn't acceptable (I've no opinion either
way really), then we'll just have to call:

> 	asm("dla\t%0,%1" : "=r" (result) : "m" (foo));

ill-formed.  You should only use "m" if the instruction can handle
every valid memory reference.

Richard
More information about the Binutils mailing list