Known issue ? Thanks, Badari elm3b29:~/vec.mm/linux-2.6.17-rc6 # /tmp/crash ./System.map vmlinux crash 4.0-2.30 Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc. Copyright (C) 2004, 2005, 2006 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005 Fujitsu Limited Copyright (C) 2005 NEC Corporation Copyright (C) 1999, 2002 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. GNU gdb 6.1 Copyright 2004 Free Software Foundation, Inc. GDB 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. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... crash: cannot resolve "system_utsname" -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility

Badari Pulavarty wrote: > Just realized that -mm has patches to remove system_utsname. > Thing to watch out for future changes for crash. > What does sys_uname() read?

Dave > > Thanks, > Badari > > On Thu, 2006-06-15 at 09:53 -0700, Badari Pulavarty wrote: > > Known issue ? > > > > Thanks, > > Badari > > > > elm3b29:~/vec.mm/linux-2.6.17-rc6 # /tmp/crash ./System.map vmlinux > > > > crash 4.0-2.30 > > Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc. > > Copyright (C) 2004, 2005, 2006 IBM Corporation > > Copyright (C) 1999-2006 Hewlett-Packard Co > > Copyright (C) 2005 Fujitsu Limited > > Copyright (C) 2005 NEC Corporation > > Copyright (C) 1999, 2002 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. > > > > GNU gdb 6.1 > > Copyright 2004 Free Software Foundation, Inc. > > GDB 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. > > Type "show copying" to see the conditions. > > There is absolutely no warranty for GDB. Type "show warranty" for > > details. > > This GDB was configured as "x86_64-unknown-linux-gnu"... > > > > > > crash: cannot resolve "system_utsname" > > > > > > > > -- > > Crash-utility mailing list > > Crash-utility(a)redhat.com > > https://www.redhat.com/mailman/listinfo/crash-utility > > -- > Crash-utility mailing list > Crash-utility(a)redhat.com > https://www.redhat.com/mailman/listinfo/crash-utility -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility

> static inline struct new_utsname *utsname(void) > { > return &current->nsproxy->uts_ns->name; > } > > Ok, thanks... Well, at a minimum we'll have to skip the verify_namelist() stage, or perhaps call it later, some time after: (1) task_init() is complete, and (2) the required new_utsname fields get filled in from following the trail above, perhaps from the first idle task? Unless there's some other way we can access it.

Jun'ichi Nomura wrote: > Hi, > > Dave Anderson wrote: > >> static inline struct new_utsname *utsname(void) > >> { > >> return &current->nsproxy->uts_ns->name; > >> } > >> > >> > > Ok, thanks... > > > > Well, at a minimum we'll have to skip the > > verify_namelist() stage, or perhaps call it later, > > some time after: > > > > (1) task_init() is complete, and > > (2) the required new_utsname fields get filled in from > > following the trail above, perhaps from the first > > idle task? > > > > Unless there's some other way we can access it. > > I think you can get it from init_uts_ns.name, > where 'name' is struct new_utsname. > > init/version.c: > struct uts_namespace init_uts_ns = { > .kref = { > .refcount = ATOMIC_INIT(2), > }, > .name = { > .sysname = UTS_SYSNAME, > .nodename = UTS_NODENAME, > .release = UTS_RELEASE, > .version = UTS_VERSION, > .machine = UTS_MACHINE, > .domainname = UTS_DOMAINNAME, > }, > }; > > Thanks, > -- > Jun'ichi Nomura, NEC Solutions (America), Inc. > Yep, thanks Nic, I was just looking at the kernel patch, and it looks simple enough. Badari, since this is read PRE_GDB, can you try something like this: $ diff kernel.c.orig kernel.c 120,122c120,130 < readmem(symbol_value("system_utsname"), KVADDR, &kt->utsname, < sizeof(struct new_utsname), "system_utsname", < FAULT_ON_ERROR); --- > if (symbol_exists("system_utsname")) > readmem(symbol_value("system_utsname"), KVADDR, &kt->utsname, > sizeof(struct new_utsname), "system_utsname", > RETURN_ON_ERROR); > else if (symbol_exists("init_uts_ns")) > readmem(symbol_value("init_uts_ns") + sizeof(int), > KVADDR, &kt->utsname, sizeof(struct new_utsname), > "init_uts_ns", RETURN_ON_ERROR); > else > error(INFO, "cannot access utsname information\n\n"); > $ Thanks, Dave