Re: [PATCH v9 3.2 2/9] uprobes: handle breakpoint and signal step exception.

[Srikar Dronamraju <srikar@linux.vnet.ibm.com>]

> Srikar,
> 
>   Can we use existing SET_IP() instead of set_instruction_pointer() ?
> 

Oleg had already commented about this in one his uprobes reviews.

The GET_IP/SET_IP available in include/asm-generic/ptrace.h doesnt work
on all archs. Atleast it doesnt work on powerpc when I tried it.

Also most archs define instruction_pointer(). So I thought (rather Peter
Zijlstra suggested the name set_instruction_pointer())
set_instruction_pointer was a better bet than SET_IP. I 

Also I dont see any usage for SET_IP/GET_IP.

May be we should have something like this in
include/asm-generic/ptrace.h

#ifdef instruction_pointer
#define GET_IP(regs)		(instruction_pointer(regs))

#define set_instruction_pointer(regs, val) (instruction_pointer(regs) = (val))

#define SET_IP(regs, val)	(set_instruction_pointer(regs,val))

#endif

or should we do away with GET_IP/SET_IP esp since there are no many
users?

-- 
Thanks and Regards
Srikar

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