From: Benjamin Herrenschmidt <benh@au1.ibm.com>
To: Mike Frysinger <vapier@gentoo.org>
Cc: linuxppc-dev <linuxppc-dev@ozlabs.org>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Subject: Re: [PATCH] Implement GET_IP/SET_IP for powerpc architecture.
Date: Fri, 03 Feb 2012 08:23:53 +1100 [thread overview]
Message-ID: <1328217833.5776.7.camel@pasglop> (raw)
In-Reply-To: <201202021128.49188.vapier@gentoo.org>
On Thu, 2012-02-02 at 11:28 -0500, Mike Frysinger wrote:
> On Thursday 02 February 2012 09:41:25 Srikar Dronamraju wrote:
> > +#define GET_FP(regs) (0)
> > +#define SET_FP(regs, val)
>
> ppc doesn't have a standard FP location ?
Not really no, it's the sp (r1). r31 might be considered a "frame
pointer" under some circumstances but there isn't much you can do with
it, it's really r1 that gives you the ability to backtrace (each stack
frame contains a pointer to the next one).
> > +#define profile_pc(regs) GET_IP(regs)
>
> pretty sure you don't need this as asm-generic/ptrace.h already has a
> definition for you
> -mike
Cheers,
Ben.
next prev parent reply other threads:[~2012-02-02 21:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-02 14:41 [PATCH] Implement GET_IP/SET_IP for powerpc architecture Srikar Dronamraju
2012-02-02 16:28 ` Mike Frysinger
2012-02-02 16:36 ` Srikar Dronamraju
2012-02-02 17:02 ` Mike Frysinger
2012-02-02 21:23 ` Benjamin Herrenschmidt [this message]
2012-02-08 14:53 ` [PATCH v2 ] " Srikar Dronamraju
2012-02-09 2:56 ` Mike Frysinger
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