From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail9.hitachi.co.jp (mail9.hitachi.co.jp [133.145.228.44]) by lists.ozlabs.org (Postfix) with ESMTP id D4A571A0011 for ; Wed, 2 Jul 2014 17:18:22 +1000 (EST) Message-ID: <53B3B233.5000307@hitachi.com> Date: Wed, 02 Jul 2014 16:18:11 +0900 From: Masami Hiramatsu MIME-Version: 1.0 To: Benjamin Herrenschmidt , Paul Mackerras , Tony Luck Subject: Re: [PATCH v5 1/2] kprobes/powerpc: Fix arch_deref_entry_point to support ABIv2 References: <1404276081.7254.1.camel@concordia> <20140702070022.14689.7254.stgit@kbuild-fedora.novalocal> In-Reply-To: <20140702070022.14689.7254.stgit@kbuild-fedora.novalocal> Content-Type: text/plain; charset=UTF-8 Cc: Jeremy Fitzhardinge , Rusty Russell , Anoop Thomas Mathew , Andrew Morton , Arnd Bergmann , linux-tip-commits@vger.kernel.org, Jiri Kosina , sparse@chrisli.org, rdunlap@infradead.org, "H. Peter Anvin" , Linux Kernel Mailing List , anil.s.keshavamurthy@intel.com, Ingo Molnar , Chris Wright , linuxppc-dev@lists.ozlabs.org, Thomas Gleixner , dl9pf@gmx.de, yrl.pp-manager.tt@hitachi.com, akataria@vmware.com, Linus Torvalds , "David S. Miller" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , (2014/07/02 16:00), Masami Hiramatsu wrote: > Since PowerPC64 ABIv2 doesn't have function descriptor > any more, arch_deref_entry_point(), which returns function > entry point from function descriptor, should be updated. Please ignore this patch, since it is already fixed by Michael https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2f0143c91d30823f6f6e7d94d7fa818f7ab18a18 We only need 2/2. Thank you, > > Signed-off-by: Masami Hiramatsu > Cc: Benjamin Herrenschmidt > Cc: Paul Mackerras > Cc: Anoop Thomas Mathew > Cc: Jiri Kosina > Cc: linuxppc-dev@lists.ozlabs.org > --- > arch/powerpc/kernel/kprobes.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c > index 90fab64..72a1034 100644 > --- a/arch/powerpc/kernel/kprobes.c > +++ b/arch/powerpc/kernel/kprobes.c > @@ -491,7 +491,12 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, > return ret; > } > > -#ifdef CONFIG_PPC64 > +#if defined(CONFIG_PPC64) && (!defined(_CALL_ELF) || _CALL_ELF == 1) > +/* > + * On PPC64 ABIv1 the function pointer actually points to the > + * function's descriptor. The first entry in the descriptor is the > + * address of the function text. > + */ > unsigned long arch_deref_entry_point(void *entry) > { > return ((func_descr_t *)entry)->entry; > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Masami HIRAMATSU Software Platform Research Dept. Linux Technology Research Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu.pt@hitachi.com