NetBSD Problem Report #40300

From bouyer@antioche.lip6.fr  Tue Dec 30 16:55:00 2008
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Date: Tue, 30 Dec 2008 17:54:56 +0100 (MET)
From: Manuel BOUYER <bouyer@antioche.lip6.fr>
Reply-To: bouyer@antioche.lip6.fr
To: gnats-bugs@gnats.NetBSD.org
Subject: 'target kvm' doesn't work on alpha
X-Send-Pr-Version: 3.95

>Number:         40300
>Category:       toolchain
>Synopsis:       'target kvm' doesn't work on alpha
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 30 16:55:00 +0000 2008
>Closed-Date:    
>Last-Modified:  Thu Jan 05 19:35:00 +0000 2012
>Originator:     bouyer@antioche.lip6.fr
>Release:        NetBSD 5.0_BETA
>Organization:
>Environment:
System: NetBSD armandeche 5.0_BETA NetBSD 5.0_BETA (GENERIC-$Revision: 1.325 $) #2: Wed Dec 24 14:55:58 CET 2008 bouyer@roll:/dsk/l1/misc/bouyer/tmp/alpha/obj/dsk/l1/misc/bouyer/netbsd-5/src/sys/arch/alpha/compile/ARMANDECHE alpha
Architecture: alpha
Machine: alpha
>Description:
	'target kvm' doesn't exist in alpha--netbsd-gdb built from
	build.sh. Quoting Martin Husemann:
src/gnu/usr.bin/gdb6/arch/alpha/defs.mk:

   G_LIBGDB_OBS does not contain bsd-kvm.o

No idea why mknative did not pick it up or if it would work if you add it.

  I tried adding bsd-kvm.o to G_LIBGDB_OBS but it seems it's not enough.

>How-To-Repeat:
	try "target kvm" in gdb targetted for NetBSD/alpha
>Fix:
	please :)

>Release-Note:

>Audit-Trail:
From: David Holland <dholland-bugs@netbsd.org>
To: Manuel BOUYER <bouyer@antioche.lip6.fr>
Cc: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org, gnats-bugs@netbsd.org
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Sun, 4 Jan 2009 01:53:37 +0000

 On Tue, Dec 30, 2008 at 04:55:00PM +0000, Manuel BOUYER wrote:
  > >Synopsis:       'target kvm' doesn't work on alpha
  > 	'target kvm' doesn't exist in alpha--netbsd-gdb built from
  > 	build.sh. Quoting Martin Husemann:
  > src/gnu/usr.bin/gdb6/arch/alpha/defs.mk:
  > 
  >    G_LIBGDB_OBS does not contain bsd-kvm.o
  > 
  > No idea why mknative did not pick it up or if it would work if you add it.
  > 
  >   I tried adding bsd-kvm.o to G_LIBGDB_OBS but it seems it's not enough.

 I had the displeasure of digging around in gdb config recently, so
 while I'm far from an expert I think I know what's wrong.

 It looks as if you need to add a call to bsd_kvm_add_target() to
 _initialize_alphabsd_nat() at the bottom of
 src/gnu/dist/gdb6/gdb/alphabsd-nat.c, akin to the one in
 i386nbsd-nat.c.

 To do it properly you also need to add bsd-kvm.o to NATDEPFILES in
 src/gnu/dist/gdb6/gdb/config/alpha/nbsd.mh, and rerun mknative in all
 its full glory.

 mipsnbsd-nat.c and config/mips/nbsd.mh also appear to be missing this,
 and maybe other targets too.

 -- 
 David A. Holland
 dholland@netbsd.org

From: Nick Hudson <nick.hudson@gmx.co.uk>
To: gnats-bugs@netbsd.org
Cc: port-alpha-maintainer@netbsd.org,
 gnats-admin@netbsd.org,
 netbsd-bugs@netbsd.org,
 bouyer@antioche.lip6.fr
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Sun, 4 Jan 2009 11:11:46 +0000

 On Sunday 04 January 2009 01:55:03 David Holland wrote:
 > The following reply was made to PR port-alpha/40300; it has been noted by
 > GNATS.
 >
 > From: David Holland <dholland-bugs@netbsd.org>
 > To: Manuel BOUYER <bouyer@antioche.lip6.fr>
 > Cc: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
 > 	netbsd-bugs@netbsd.org, gnats-bugs@netbsd.org
 > Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
 > Date: Sun, 4 Jan 2009 01:53:37 +0000
 >
 >  On Tue, Dec 30, 2008 at 04:55:00PM +0000, Manuel BOUYER wrote:
 >   > >Synopsis:       'target kvm' doesn't work on alpha
 >   >
 >   > 	'target kvm' doesn't exist in alpha--netbsd-gdb built from
 >   > 	build.sh. Quoting Martin Husemann:
 >   > src/gnu/usr.bin/gdb6/arch/alpha/defs.mk:
 >   >
 >   >    G_LIBGDB_OBS does not contain bsd-kvm.o
 >   >
 >   > No idea why mknative did not pick it up or if it would work if you add
 >   > it.
 >   >
 >   >   I tried adding bsd-kvm.o to G_LIBGDB_OBS but it seems it's not
 >   > enough.
 >
 >  I had the displeasure of digging around in gdb config recently, so
 >  while I'm far from an expert I think I know what's wrong.
 >
 >  It looks as if you need to add a call to bsd_kvm_add_target() to
 >  _initialize_alphabsd_nat() at the bottom of
 >  src/gnu/dist/gdb6/gdb/alphabsd-nat.c, akin to the one in
 >  i386nbsd-nat.c.
 >
 >  To do it properly you also need to add bsd-kvm.o to NATDEPFILES in
 >  src/gnu/dist/gdb6/gdb/config/alpha/nbsd.mh, and rerun mknative in all
 >  its full glory.

 This is correct. All the effort (not much really) is in getting  
 alphabsd_supply_pcb right.

 Nick

From: matthew green <mrg@eterna.com.au>
To: gnats-bugs@NetBSD.org
Cc: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
    netbsd-bugs@netbsd.org
Subject: re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Mon, 05 Jan 2009 04:30:32 +1100

 "target kvm" doesn't work on a cross-gdb.

 this PR is not alpha specific.


 .mrg.

From: David Holland <dholland-bugs@netbsd.org>
To: matthew green <mrg@eterna.com.au>
Cc: gnats-bugs@NetBSD.org, port-alpha-maintainer@netbsd.org,
	gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Sun, 4 Jan 2009 20:00:21 +0000

 On Mon, Jan 05, 2009 at 04:30:32AM +1100, matthew green wrote:
  > 
  > "target kvm" doesn't work on a cross-gdb.
  > 
  > this PR is not alpha specific.

 The .mh files missing kvm are

    alpha/nbsd.mh
    mips/nbsd.mh
    pa/nbsd.mh
    sh/nbsd.mh

 (and arm/nbsdaout.mh, m68k/nbsdaout.mh, which might not matter.)

 -- 
 David A. Holland
 dholland@netbsd.org

Responsible-Changed-From-To: port-alpha-maintainer->toolchain-maintainer
Responsible-Changed-By: dholland@NetBSD.org
Responsible-Changed-When: Sun, 04 Jan 2009 20:09:24 +0000
Responsible-Changed-Why:
gdb config issue affecting several platforms, change category to toolchain


Responsible-Changed-From-To: toolchain-maintainer->toolchain-manager
Responsible-Changed-By: dholland@NetBSD.org
Responsible-Changed-When: Sun, 04 Jan 2009 20:11:54 +0000
Responsible-Changed-Why:
Oops. (and after I carefully went and looked up the right thing, I couldn't
manage to type it in correctly...)


From: matthew green <mrg@eterna.com.au>
To: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
    netbsd-bugs@netbsd.org, gnats-bugs@NetBSD.org
Cc: 
Subject: re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Mon, 05 Jan 2009 17:21:53 +1100


    "target kvm" doesn't work on a cross-gdb.

    this PR is not alpha specific.


 actually, i realised that there are two problems:

 	- alpha has no native "target kvm"

 	- cross netbsd-gdb has no "target kvm"

 the former is fairly easy to fix, and the fixes have been discussed
 already, but the latter i'm not sure about at all.



 .mrg.

From: David Holland <dholland-bugs@netbsd.org>
To: matthew green <mrg@eterna.com.au>
Cc: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
	netbsd-bugs@netbsd.org, gnats-bugs@NetBSD.org
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Mon, 5 Jan 2009 07:19:02 +0000

 On Mon, Jan 05, 2009 at 05:21:53PM +1100, matthew green wrote:
  > actually, i realised that there are two problems:
  > 
  > 	- alpha has no native "target kvm"
  > 
  > 	- cross netbsd-gdb has no "target kvm"
  > 
  > the former is fairly easy to fix, and the fixes have been discussed
  > already, but the latter i'm not sure about at all.

 Right, but I don't think this PR is about the latter. (Manuel? Do you
 need it to work in a cross-gdb?)

 -- 
 David A. Holland
 dholland@netbsd.org

From: Manuel Bouyer <bouyer@antioche.eu.org>
To: gnats-bugs@NetBSD.org
Cc: toolchain-manager@NetBSD.org, gnats-admin@NetBSD.org,
        netbsd-bugs@NetBSD.org
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Mon, 5 Jan 2009 15:53:26 +0100

 On Mon, Jan 05, 2009 at 07:20:02AM +0000, David Holland wrote:
 > The following reply was made to PR toolchain/40300; it has been noted by GNATS.
 > 
 > From: David Holland <dholland-bugs@netbsd.org>
 > To: matthew green <mrg@eterna.com.au>
 > Cc: port-alpha-maintainer@netbsd.org, gnats-admin@netbsd.org,
 > 	netbsd-bugs@netbsd.org, gnats-bugs@NetBSD.org
 > Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
 > Date: Mon, 5 Jan 2009 07:19:02 +0000
 > 
 >  On Mon, Jan 05, 2009 at 05:21:53PM +1100, matthew green wrote:
 >   > actually, i realised that there are two problems:
 >   > 
 >   > 	- alpha has no native "target kvm"
 >   > 
 >   > 	- cross netbsd-gdb has no "target kvm"
 >   > 
 >   > the former is fairly easy to fix, and the fixes have been discussed
 >   > already, but the latter i'm not sure about at all.
 >  
 >  Right, but I don't think this PR is about the latter. (Manuel? Do you
 >  need it to work in a cross-gdb?)

 Actually yes, it is what I was trying to do. The most powerfull boxes at
 work are running linux so it's where I build NetBSD bits, including
 kernels ...

 -- 
 Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
      NetBSD: 26 ans d'experience feront toujours la difference
 --

From: David Holland <dholland-bugs@netbsd.org>
To: Manuel Bouyer <bouyer@antioche.eu.org>
Cc: gnats-bugs@NetBSD.org, toolchain-manager@NetBSD.org,
	gnats-admin@NetBSD.org, netbsd-bugs@NetBSD.org
Subject: Re: port-alpha/40300: 'target kvm' doesn't work on alpha
Date: Thu, 8 Jan 2009 06:06:15 +0000

 On Mon, Jan 05, 2009 at 03:53:26PM +0100, Manuel Bouyer wrote:
  > > > actually, i realised that there are two problems:
  > > > 
  > > > 	- alpha has no native "target kvm"
  > > > 
  > > > 	- cross netbsd-gdb has no "target kvm"
  > > > 
  > > > the former is fairly easy to fix, and the fixes have been discussed
  > > > already, but the latter i'm not sure about at all.
  > >  
  > >  Right, but I don't think this PR is about the latter. (Manuel? Do you
  > >  need it to work in a cross-gdb?)
  > 
  > Actually yes, it is what I was trying to do. The most powerfull boxes at
  > work are running linux so it's where I build NetBSD bits, including
  > kernels ...

 I suspect this is going to be difficult, because gdb thinks it's a
 host thing, not a target thing.

 You could try adding it to the .mh and *-nat.c files corresponding to
 the Linux build host you're using and see what happens, but that's not
 very likely to work.

 -- 
 David A. Holland
 dholland@netbsd.org

State-Changed-From-To: open->feedback
State-Changed-By: dholland@NetBSD.org
State-Changed-When: Sat, 31 Dec 2011 19:31:18 +0000
State-Changed-Why:
Anyone know if this is improved with the new gdb?


State-Changed-From-To: feedback->open
State-Changed-By: dholland@NetBSD.org
State-Changed-When: Tue, 03 Jan 2012 14:42:33 +0000
State-Changed-Why:
jdc says it isn't.


From: christos@zoulas.com (Christos Zoulas)
To: gnats-bugs@NetBSD.org, toolchain-manager@netbsd.org, 
	netbsd-bugs@netbsd.org, gnats-admin@netbsd.org, dholland@NetBSD.org, 
	bouyer@antioche.lip6.fr
Cc: 
Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
Date: Tue, 3 Jan 2012 13:21:28 -0500

 On Jan 3,  2:42pm, dholland@NetBSD.org (dholland@NetBSD.org) wrote:
 -- Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)

 | Synopsis: 'target kvm' doesn't work on alpha
 | 
 | State-Changed-From-To: feedback->open
 | State-Changed-By: dholland@NetBSD.org
 | State-Changed-When: Tue, 03 Jan 2012 14:42:33 +0000
 | State-Changed-Why:
 | jdc says it isn't.

 I don't have access to an alpha anymore, so unless we get a better description
 of the error, or access to a machine or simulator, I doubt this will be fixed.

 christos

From: Nick Hudson <nick.hudson@gmx.co.uk>
To: Christos Zoulas <christos@zoulas.com>
Cc: gnats-bugs@netbsd.org,
 toolchain-manager@netbsd.org,
 netbsd-bugs@netbsd.org,
 gnats-admin@netbsd.org,
 dholland@netbsd.org,
 bouyer@antioche.lip6.fr
Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
Date: Wed, 4 Jan 2012 07:51:57 +0000

 --Boundary-00=_dUABPAjl6m5nnUd
 Content-Type: Text/Plain;
   charset="iso-8859-15"
 Content-Transfer-Encoding: 7bit

 On Tuesday 03 January 2012 18:21:28 Christos Zoulas wrote:
 > On Jan 3,  2:42pm, dholland@NetBSD.org (dholland@NetBSD.org) wrote:
 > -- Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)

 This diff fixes live kernel target kvm for me - haven't tried crash dump.

 Not sure if it's right.

 Nick

 --Boundary-00=_dUABPAjl6m5nnUd
 Content-Type: text/x-patch;
   charset="ISO-8859-1";
   name="alphabsd-nat.c.diff"
 Content-Transfer-Encoding: 7bit
 Content-Disposition: attachment;
 	filename="alphabsd-nat.c.diff"

 Index: alphabsd-nat.c
 ===================================================================
 RCS file: /cvsroot/src/external/gpl3/gdb/dist/gdb/alphabsd-nat.c,v
 retrieving revision 1.3
 diff -u -p -u -r1.3 alphabsd-nat.c
 --- alphabsd-nat.c	10 Oct 2011 22:18:08 -0000	1.3
 +++ alphabsd-nat.c	4 Jan 2012 07:50:37 -0000
 @@ -180,6 +180,7 @@ alphabsd_supply_pcb (struct regcache *re
      return 0;

    regcache_raw_supply (regcache, ALPHA_SP_REGNUM, &pcb->pcb_hw.apcb_ksp);
 +  regcache_raw_supply (regcache, ALPHA_GCC_FP_REGNUM, &pcb->pcb_hw.apcb_ksp);

    for (regnum = ALPHA_S0_REGNUM; regnum < ALPHA_A0_REGNUM; regnum++)
      regcache_raw_supply (regcache, regnum,

 --Boundary-00=_dUABPAjl6m5nnUd--

From: Nicolas Joly <njoly@pasteur.fr>
To: Nick Hudson <nick.hudson@gmx.co.uk>
Cc: Christos Zoulas <christos@zoulas.com>, gnats-bugs@netbsd.org,
	toolchain-manager@netbsd.org, netbsd-bugs@netbsd.org,
	gnats-admin@netbsd.org, dholland@netbsd.org,
	bouyer@antioche.lip6.fr
Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
Date: Thu, 5 Jan 2012 19:02:36 +0100

 On Wed, Jan 04, 2012 at 07:51:57AM +0000, Nick Hudson wrote:
 > On Tuesday 03 January 2012 18:21:28 Christos Zoulas wrote:
 > > On Jan 3,  2:42pm, dholland@NetBSD.org (dholland@NetBSD.org) wrote:
 > > -- Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
 > 
 > This diff fixes live kernel target kvm for me - haven't tried crash dump.
 > 
 > Not sure if it's right.

 Still no luck on crash dump for me.

 njoly@thanos [/misc/crash]> gdb netbsd.1.gdb
 GNU gdb (GDB) 7.3.1
 Copyright (C) 2011 Free Software Foundation,Inc.
 License GPLv3+: GNU GPL version 3 or later
 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY,to the extent permitted by law.  Type "show
 copying"
 and "show warranty"for details.
 This GDB was configured as "alpha--netbsd".
 For bug reporting instructions,please see:
 <http://www.gnu.org/software/gdb/bugs/>...
 Reading symbols from /misc/crash/netbsd.1.gdb...done.
 (gdb) target kvm netbsd.1.core
 #0  <unavailable> in ?? ()
 (gdb) bt
 #0  <unavailable> in ?? ()
 PC not available

 -- 
 Nicolas Joly

 Projects and Developments in Bioinformatics
 Institut Pasteur, Paris.

From: Nick Hudson <nick.hudson@gmx.co.uk>
To: Nicolas Joly <njoly@pasteur.fr>
Cc: Christos Zoulas <christos@zoulas.com>,
 gnats-bugs@netbsd.org,
 toolchain-manager@netbsd.org,
 netbsd-bugs@netbsd.org,
 gnats-admin@netbsd.org,
 dholland@netbsd.org,
 bouyer@antioche.lip6.fr
Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
Date: Thu, 5 Jan 2012 19:25:44 +0000

 On Thursday 05 January 2012 18:02:36 Nicolas Joly wrote:
 > Still no luck on crash dump for me.

 How did you crate your crash dump?

 Nick

From: Nicolas Joly <njoly@pasteur.fr>
To: Nick Hudson <nick.hudson@gmx.co.uk>
Cc: Nicolas Joly <njoly@pasteur.fr>, Christos Zoulas <christos@zoulas.com>,
	gnats-bugs@netbsd.org, toolchain-manager@netbsd.org,
	netbsd-bugs@netbsd.org, gnats-admin@netbsd.org, dholland@netbsd.org,
	bouyer@antioche.lip6.fr
Subject: Re: toolchain/40300 ('target kvm' doesn't work on alpha)
Date: Thu, 5 Jan 2012 20:33:49 +0100

 On Thu, Jan 05, 2012 at 07:25:44PM +0000, Nick Hudson wrote:
 > On Thursday 05 January 2012 18:02:36 Nicolas Joly wrote:
 > > Still no luck on crash dump for me.
 > 
 > How did you crate your crash dump?

 This is a dump from a machine crash that occured on october 5.

 njoly@thanos [/misc/crash]> dmesg -M netbsd.1.core -N netbsd.1.gdb
 [...]
 CPU 0: fatal kernel trap:

 CPU 0    trap entry = 0x4 (unaligned access fault)
 CPU 0    a0         = 0xfffffc002364dff9
 CPU 0    a1         = 0x29
 CPU 0    a2         = 0xb
 CPU 0    pc         = 0xfffffc0000989ab4
 CPU 0    ra         = 0xfffffc00009897e8
 CPU 0    pv         = 0xfffffc00007c4998
 CPU 0    curlwp     = 0xfffffc00195bade0
 CPU 0        pid = 23539,comm = ssh

 panic: trap
 cpu0: Begin traceback...
 alpha trace requires known PC =eject=
 cpu0: End traceback...

 dumping to dev 4,1 offset 2884575
 dump 

 -- 
 Nicolas Joly

 Projects and Developments in Bioinformatics
 Institut Pasteur, Paris.

>Unformatted:

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