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ARM arch: unknown asm insn "mrc" in v5T_semantics()

I'm targetting an ARM7 TDMI processor, and gcc 3.3.2 complains about this inline asm instruction from function arm_stub.h:v5T_semantics().

    asm volatile ("mrc  p15,0,%0,c0,c0,0\n"
		  : "=r" (id) : /* no inputs */);

What's up with this insn, I can't find it in the reference. And what should I correct to make it work?

Thanks,
Heiko Panther

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