NetBSD Problem Report #53056

From www@NetBSD.org  Sun Feb 25 18:16:55 2018
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Date: Sun, 25 Feb 2018 18:16:54 +0000 (UTC)
From: coypu@sdf.org
Reply-To: coypu@sdf.org
To: gnats-bugs@NetBSD.org
Subject: ddb broken in -current
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>Number:         53056
>Category:       port-xen
>Synopsis:       ddb broken in -current
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    jdolecek
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 25 18:20:00 +0000 2018
>Closed-Date:    Sun Jun 24 17:17:45 +0000 2018
>Last-Modified:  Sun Jun 24 17:20:00 +0000 2018
>Originator:     coypu
>Release:        NetBSD 8.99.12
>Organization:
>Environment:
NetBSD 8.99.12 (XEN3_DOM0) #0: Sun Feb 25 18:32:06 IST 2018 fly@planets:/home/fly/obj-gcc5/sys/arch/amd64/compile/XEN3_DOM0
>Description:
d> ps
gives:
db_read_ptr: cannot find 'allproc'

bt shows ?() at ffffff....

switching back to gcc-5 didn't help
>How-To-Repeat:

>Fix:

>Release-Note:

>Audit-Trail:

Responsible-Changed-From-To: port-xen-maintainer->jdolecek
Responsible-Changed-By: jdolecek@NetBSD.org
Responsible-Changed-When: Sun, 24 Jun 2018 17:17:45 +0000
Responsible-Changed-Why:
I've worked on this.


State-Changed-From-To: open->closed
State-Changed-By: jdolecek@NetBSD.org
State-Changed-When: Sun, 24 Jun 2018 17:17:45 +0000
State-Changed-Why:
Fix the problem. It was introduced by amd64/locore.S rev 1.141, 
kern.ldscript.Xen was not updated with fix. Confirmed netbsd-8 branch
is correct - it's locore.S still has the symbol which forces the align.
Thus no need for pullup.


From: "Jaromir Dolecek" <jdolecek@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/53056 CVS commit: src/sys/arch/amd64/conf
Date: Sun, 24 Jun 2018 17:11:58 +0000

 Module Name:	src
 Committed By:	jdolecek
 Date:		Sun Jun 24 17:11:57 UTC 2018

 Modified Files:
 	src/sys/arch/amd64/conf: kern.ldscript.Xen

 Log Message:
 follow change in rev. 1.22 of kern.ldscript and apply same fix for xen
 ldscript too, but using just regular PAGE_ALIGN alignment:

 """
 Fix a pretty dumb mistake I made in r1.22: the alignment needs to be in the
 bss, otherwise the bootloader will use memory before __kernel_end and give
 a wrong start pa to the kernel.
 """

 this got broke by amd64/locore.S rev. 1.141 which removed an unused variable
 which forced the alignment

 this fixes ps/bt in ddb to be able to find symbols and hence PR port-xen/53056


 To generate a diff of this commit:
 cvs rdiff -u -r1.14 -r1.15 src/sys/arch/amd64/conf/kern.ldscript.Xen

 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.

>Unformatted:

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