From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail1.windriver.com (mail1.windriver.com [147.11.146.13]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail1.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id EB6942C008D for ; Thu, 23 Aug 2012 12:17:35 +1000 (EST) From: Tiejun Chen To: Subject: [v2][PATCH 2/3] powerpc: Bail out of KGDB when we've been triggered Date: Thu, 23 Aug 2012 10:10:19 +0800 Message-ID: <1345687820-5248-2-git-send-email-tiejun.chen@windriver.com> In-Reply-To: <1345687820-5248-1-git-send-email-tiejun.chen@windriver.com> References: <1345687820-5248-1-git-send-email-tiejun.chen@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, jason.wessel@windriver.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We need to skip a breakpoint exception when it occurs after a breakpoint has already been removed. Signed-off-by: Tiejun Chen --- v2: simply kgdb_skipexception() return path. arch/powerpc/kernel/kgdb.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index bbabc5a..05adb69 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -101,6 +101,21 @@ static int computeSignal(unsigned int tt) return SIGHUP; /* default for things we don't know about */ } +/** + * + * kgdb_skipexception - Bail out of KGDB when we've been triggered. + * @exception: Exception vector number + * @regs: Current &struct pt_regs. + * + * On some architectures we need to skip a breakpoint exception when + * it occurs after a breakpoint has been removed. + * + */ +int kgdb_skipexception(int exception, struct pt_regs *regs) +{ + return kgdb_isremovedbreak(regs->nip); +} + static int kgdb_call_nmi_hook(struct pt_regs *regs) { kgdb_nmicallback(raw_smp_processor_id(), regs); -- 1.5.6