From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id D4C262C00B0 for ; Wed, 22 Aug 2012 20:50:39 +1000 (EST) From: Tiejun Chen To: Subject: [PATCH 2/3] powerpc: Bail out of KGDB when we've been triggered Date: Wed, 22 Aug 2012 18:43:11 +0800 Message-ID: <1345632192-19810-2-git-send-email-tiejun.chen@windriver.com> In-Reply-To: <1345632192-19810-1-git-send-email-tiejun.chen@windriver.com> References: <1345632192-19810-1-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 --- arch/powerpc/kernel/kgdb.c | 18 ++++++++++++++++++ 1 files changed, 18 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index bbabc5a..e84252b 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -101,6 +101,24 @@ 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) +{ + if (kgdb_isremovedbreak(regs->nip)) + return 1; + + return 0; +} + static int kgdb_call_nmi_hook(struct pt_regs *regs) { kgdb_nmicallback(raw_smp_processor_id(), regs); -- 1.5.6