NetBSD Problem Report #59305

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Date: Thu, 17 Apr 2025 05:06:47 +0000 (UTC)
From: campbell+netbsd@mumble.net
Reply-To: campbell+netbsd@mumble.net
To: gnats-bugs@NetBSD.org
Subject: kernel longjmp(9) fails to make setjmp(9) return 1
X-Send-Pr-Version: www-1.0

>Number:         59305
>Category:       port-hppa
>Synopsis:       kernel longjmp(9) fails to make setjmp(9) return 1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-hppa-maintainer
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Apr 17 05:10:00 +0000 2025
>Closed-Date:    Sat Sep 20 06:51:13 +0000 2025
>Last-Modified:  Sat Sep 20 06:51:13 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
Hppa, Skip, and a Jump Foundation
>Environment:
>Description:
Kernel longjmp(9) is supposed to make setjmp(9) return 1 -- it doesn't take a second argument for the return value.  But the hppa code does this:

    303 	bv	%r0(%rp)
    304 	copy	%arg1,%ret0	/* Move return value to where it belongs. */

https://nxr.netbsd.org/xref/src/sys/arch/hppa/hppa/support.S?r=1.7#303

So it returns whatever garbage happens to be in a1.
>How-To-Repeat:
code inspection
mess with ddb, probably
>Fix:
Change

copy %arg1,%ret0

to however you spell `load immediate value 1 into %ret0' in hppaish.

>Release-Note:

>Audit-Trail:
From: "Nick Hudson" <skrll@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/59305 CVS commit: src/sys/arch/hppa/hppa
Date: Sun, 20 Apr 2025 07:39:30 +0000

 Module Name:	src
 Committed By:	skrll
 Date:		Sun Apr 20 07:39:30 UTC 2025

 Modified Files:
 	src/sys/arch/hppa/hppa: support.S

 Log Message:
 PR59305: kernel longjmp(9) fails to make setjmp(9) return 1


 To generate a diff of this commit:
 cvs rdiff -u -r1.7 -r1.8 src/sys/arch/hppa/hppa/support.S

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

State-Changed-From-To: open->feedback
State-Changed-By: skrll@NetBSD.org
State-Changed-When: Wed, 23 Apr 2025 07:00:39 +0000
State-Changed-Why:
Close now?


State-Changed-From-To: feedback->pending-pullups
State-Changed-By: skrll@NetBSD.org
State-Changed-When: Thu, 24 Apr 2025 09:17:34 +0000
State-Changed-Why:
[pullup-10 #1104]


From: "Martin Husemann" <martin@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/59305 CVS commit: [netbsd-10] src/sys/arch/hppa/hppa
Date: Fri, 9 May 2025 11:41:40 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Fri May  9 11:41:40 UTC 2025

 Modified Files:
 	src/sys/arch/hppa/hppa [netbsd-10]: support.S

 Log Message:
 Pull up following revision(s) (requested by skrll in ticket #1104):

 	sys/arch/hppa/hppa/support.S: revision 1.8

 PR59305: kernel longjmp(9) fails to make setjmp(9) return 1


 To generate a diff of this commit:
 cvs rdiff -u -r1.7 -r1.7.30.1 src/sys/arch/hppa/hppa/support.S

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

State-Changed-From-To: pending-pullups->closed
State-Changed-By: skrll@NetBSD.org
State-Changed-When: Sat, 20 Sep 2025 06:51:13 +0000
State-Changed-Why:
pull up done.


>Unformatted:

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