[PATCH v2 03/31] arm64: Exception handling

[Will Deacon]

On Wed, Aug 15, 2012 at 02:03:47PM +0100, Arnd Bergmann wrote:
> On Tuesday 14 August 2012, Catalin Marinas wrote:
> 
> > +#ifdef CONFIG_AARCH32_EMULATION
> > +#define compat_thumb_mode(regs) \
> > +	(((regs)->pstate & COMPAT_PSR_T_BIT))
> > +#else
> > +#define compat_thumb_mode(regs) (0)
> > +#endif
> 
> The symbol we use on other platforms is CONFIG_COMPAT. I don't think you
> need to have a separate CONFIG_AARCH32_EMULATION

Using COMPAT does preclude the possibility of doing something like the x32
ABI later on though. Some other architectures seem to do something similar
(MIPS32_COMPAT, IA32_EMULATION).

Will