From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from az33egw01.freescale.net (az33egw01.freescale.net [192.88.158.102]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "az33egw01.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id AFAB6DDE18 for ; Fri, 28 Sep 2007 04:00:26 +1000 (EST) Date: Thu, 27 Sep 2007 13:00:01 -0500 From: Scott Wood To: paulus@samba.org Subject: [PATCH v3] Make instruction dumping work in real mode. Message-ID: <20070927180001.GA18185@loki.buserror.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On non-book-E-or-4xx, exceptions execute in real mode. If a fault happens that leads to a register dump, the kernel currently prints XXXXXXXX because it doesn't realize that PC is a physical address. This patch checks the state of the IMMU, and if necessary converts PC into a virtual address. Signed-off-by: Scott Wood --- Resent with 40x->44x. arch/powerpc/kernel/process.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 57c589c..6dbde7f 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -354,6 +354,14 @@ static void show_instructions(struct pt_regs *regs) if (!(i % 8)) printk("\n"); +#if !defined(CONFIG_BOOKE) && !defined(CONFIG_44x) + /* If executing with the IMMU off, adjust pc rather + * than print XXXXXXXX. + */ + if (!(regs->msr & MSR_IR)) + pc = (unsigned long)phys_to_virt(pc); +#endif + /* We use __get_user here *only* to avoid an OOPS on a * bad address because the pc *should* only be a * kernel address. -- 1.5.3.1