[PATCH v2 03/31] arm64: Exception handling

On Wed, Aug 15, 2012 at 02:03:47PM +0100, Arnd Bergmann wrote:

On Tuesday 14 August 2012, Catalin Marinas wrote:

quoted

+#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