On Thu, Jul 16, 2009 at 09:21:50AM +0200, Bastian Blank wrote: > On Wed, Jul 15, 2009 at 11:31:49PM -0600, John Wright wrote: > > On Wed, Jul 15, 2009 at 08:36:27PM +0200, Bastian Blank wrote: > > > On Wed, Jul 15, 2009 at 10:45:23AM -0600, John Wright wrote: > > > > + +$(MAKE_CLEAN) -C $(DIR) modules_install > > > > INSTALL_MOD_PATH='$(CURDIR)'/$(PACKAGE_DIR) INSTALL_MOD_STRIP=1 > > > > + +$(MAKE_CLEAN) -C $(DIR) modules_install > > > > INSTALL_MOD_PATH='$(CURDIR)'/$(DEBUG_DIR) > > > > > > How about only installing debugging infos in the debugging package? > > > > THis would be ideal. Current tools like "crash" don't work with an > > image that's been stripped with "--only-keep-debug". I'm not sure what > > strip is removing that crash needs, but I'll look into it. > > This will not work on x86 because the bootable image is no elf file.
Right, but the vmlinux that we'd provide in the debug package is: $ file /usr/lib/debug/vmlinux-2.6.29-3-amd64 /usr/lib/debug/vmlinux-2.6.29-3-amd64: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, not stripped This is what I get from crash when I run it on the vmlinux I stripped with --only-keep-debug: $ sudo crash vmlinux-2.6.29-clim-3-amd64.stripped /dev/mem System.map-2.6.29-clim-3-amd64 crash 4.0-7.6 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Red Hat, Inc. Copyright (C) 2004, 2005, 2006 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. crash: vmlinux-2.6.29-clim-3-amd64.stripped: no text and data contents crash: the use of a System.map file requires that the accompanying namelist argument is a kernel file built with the -g CFLAG. The namelist argument supplied in this case is a debuginfo file, which must be accompanied by the kernel file from which it was derived. So it looks like we can't use just the debuginfo in vmlinux with crash. But since it only saves 9 MB out of 69 MB in this case, that doesn't seem like a huge problem. > > Stripping the modules themselves with "--only-keep-debug" seems to work > > with crash, but then it saves only a marginal amount of space (from 963 > > MB down to 926 MB on a 2.6.29 kernel). > > Äh. What is the size of the resulting packages? 321 MB for the linux-image-2.6.29-2-amd64-dbg deb (which contains both the unstripped vmlinux and the unstripped modules). The 686 and mckinley flavours are within 15 MB of that size (both smaller); I haven't tried this on other architectures. It might be worthwhile to teach crash to use gzipped vmlinux and .ko files. I'm not sure if any other tool that uses these files has that capability either, though. Plus, people who would need to use the debug info for the kernel will probably have space available for that. -- +----------------------------------------------------------+ | John Wright <john.wri...@hp.com> | | HP Mission Critical OS Enablement & Solution Test (MOST) | +----------------------------------------------------------+ -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
