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Re: [patch] MIPS gas problems with gcc's explicit relocs
"Maciej W. Rozycki" <macro@ds2.pg.gda.pl> writes:
> This is actually an independent problem with explicit relocs passed to
> the inside of an asm with the o32 ABI (or REL relocations, to be exact).
> Consider the following (perhaps a bit useless, but valid) code.
>
> asm(
> "lw %0,%2\n\t"
> "lw %1,%3"
> : "=r" (r0), "=&r" (r1)
> : "m" (*m0), "m" (*m1));
>
> If built for o32, non-PIC it's bad *by definition* if "%lo" is a part of
> "%2" and "%3", as HI16 and LO16 relocs need to be paired, as you say.
But relocs don't have to be in increasing address order. We already reorder
them so that R_MIPS_LO16s follow R_MIPS_HI16s, and have done for years.
See tc-mips.c:mips_frob_file().
Richard