Re: [PATCH 1/5] asm-generic/ptrace.h: start a common low levelptrace helper

From: Oleg Nesterov
Date: Thu Apr 14 2011 - 14:11:38 EST

On 04/14, Mike Frysinger wrote:
> This implements a bunch of helper funcs for poking the registers of a
> ptrace structure. Now common code should be able to portably update
> specific registers (like kgdb updating the PC).

The whole series looks correct, but I am a bit confused...

> +#ifndef GET_IP
> +#define GET_IP(regs) ((regs)->pc)
> +#endif

Could you explain this ifndef ?

IIUC, this should be included by arch/*/asm/ptrace.h. Isn't it better
to simply require that if you include asm-generic/ptrace.h you should
provide the necessary GET_* macros?

(regs)->pc looks a bit strange in asm-generic. But please feel free
to ignore.


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