imer_setup() is not compatible with PaX's RAP

[Jason A. Donenfeld]

On Tue, Nov 28, 2017 at 1:32 PM, PaX Team <pageexec at freemail.hu> wrote:
> targets of indirect calls must be marked by the RAP hash which the plugin
> will do for code it sees but for asm you'll have to do it yourself, look at
> the use of RAP_ENTRY to see how that works.

Oh, terrific. So I can just do something horrible like:

#ifdef RAP_PLUGIN
#undef ENTRY
#define ENTRY RAP_ENTRY
#endif