What processor target is this?
On most processors, the cpupage (accessed via _cpupage_ptr) has some status
bits set by the kernel on interrupt handling, but x86 is different:

#if defined(__X86__)
     #include <x86/inline.h>
     #define in_interrupt()      ((_cs() & 0x3) == 0)
#else
     #include <sys/syspage.h>
     #define in_interrupt()      (_cpupage_ptr->state & 0x3)
#endif

	Sunil.

Rob Maher wrote:
> Hi,
> 
> I'm sharing some common code with an interrupt and a thread.
> While in the interrupt, I'd like to avoid the kernel calls.
> 
> What's the best way to determine whether or not I'm currently executing in an ISR?  In VxWorks intContext() call was 
available.
> 
> I'm running 6.3.2.
> 
> Cheers,
> Rob
> 
> 
> 
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