From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 14 Feb 2005 02:02:41 +0000 (GMT) Received: from nevyn.them.org ([IPv6:::ffff:66.93.172.17]:35048 "EHLO nevyn.them.org") by linux-mips.org with ESMTP id ; Mon, 14 Feb 2005 02:02:25 +0000 Received: from drow by nevyn.them.org with local (Exim 4.44 #1 (Debian)) id 1D0VYv-0006d5-52; Sun, 13 Feb 2005 21:02:09 -0500 Date: Sun, 13 Feb 2005 21:02:09 -0500 From: Daniel Jacobowitz To: ralf@linux-mips.org Cc: linux-mips@linux-mips.org Subject: Re: Support /proc/kcore for MIPS Message-ID: <20050214020209.GA25335@nevyn.them.org> References: <20050121005954.GA10260@nevyn.them.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050121005954.GA10260@nevyn.them.org> User-Agent: Mutt/1.5.6+20040907i Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 7244 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: dan@debian.org Precedence: bulk X-list: linux-mips Ping. I've now tested this patch in both 32-bit and 64-bit kernels. On Thu, Jan 20, 2005 at 07:59:54PM -0500, Daniel Jacobowitz wrote: > I wanted to do live debugging on an ornery task_struct this morning, so I > hooked up /proc/kcore for MIPS. I'm pretty sure that the CKSEG0 bits are > wrong, but I did need to cover that region - because the SB-1 kernel links > at 0xffffffff80100000 or so, disassembly and printing static variables don't > work unless the debugger can read that region. > > Signed-off-by: Daniel Jacobowitz > > Index: linux/arch/mips/mm/init.c > =================================================================== > --- linux.orig/arch/mips/mm/init.c 2005-01-20 16:26:58.791321462 -0500 > +++ linux/arch/mips/mm/init.c 2005-01-20 16:34:27.231213174 -0500 > @@ -24,6 +24,7 @@ > #include > #include > #include > +#include > > #include > #include > @@ -197,6 +198,11 @@ > return 0; > } > > +static struct kcore_list kcore_mem, kcore_vmalloc; > +#ifdef CONFIG_MIPS64 > +static struct kcore_list kcore_kseg0; > +#endif > + > void __init mem_init(void) > { > unsigned long codesize, reservedpages, datasize, initsize; > @@ -247,6 +253,16 @@ > datasize = (unsigned long) &_edata - (unsigned long) &_etext; > initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; > > +#ifdef CONFIG_MIPS64 > + if ((unsigned long) &_text > (unsigned long) CKSEG0) > + /* The -4 is a hack so that user tools don't have to handle > + the overflow. */ > + kclist_add(&kcore_kseg0, (void *) CKSEG0, 0x80000000 - 4); > +#endif > + kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT); > + kclist_add(&kcore_vmalloc, (void *)VMALLOC_START, > + VMALLOC_END-VMALLOC_START); > + > printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " > "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n", > (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), > > -- > Daniel Jacobowitz > > -- Daniel Jacobowitz CodeSourcery, LLC