[m68k] fix return value extraction

[Andreas Schwab]

Nathan Sidwell <nathan@codesourcery.com> writes:

> + /* a.out */
> + 
> + void
> + m68k_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
> + {
> +   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
> + 
> +   set_gdbarch_return_value (gdbarch, m68k_return_value);
> + 
> +   /* aout uses %a1 */
> +   tdep->struct_value_regnum = M68K_A1_REGNUM;
> +   tdep->struct_return = reg_struct_return;
> +   /* Pointers are returned in %a0 */
> +   tdep->ptr_value_regnum = M68K_A0_REGNUM;

I don't think this is correct.  The GCC default for m68k is the old Sun3
ABI, which returns everything in %d0 and uses pcc structure return.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
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