port-arm/59351: compat_setjmp is busted

[campbell+netbsd%mumble.net@localhost]

>Number:         59351
>Category:       port-arm
>Synopsis:       compat_setjmp is busted
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 25 01:40:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current
>Organization:
Arm CompatBSD Longjmation
>Environment:
>Description:
From https://releng.netbsd.org/b5reports/evbarm-earmv7hf/2025/2025.04.24.01.52.38/test.log:

lib/libc/setjmp/t_setjmp (261/986): 10 test cases
    _longjmp_zero: [0.065441s] Passed.
    _setjmp: [0.062947s] Passed.
    compat13_longjmp_zero: [8.192142s] Failed: Test program received signal 11 (core dumped)
    compat13_setjmp: [1.058821s] Failed: Test program received signal 11 (core dumped)
    compat13_sigsetjmp_nosave: [0.063790s] Passed.
    compat13_sigsetjmp_save: [0.988738s] Failed: Test program received signal 11 (core dumped)
    longjmp_zero: [0.062163s] Passed.
    setjmp: [0.061560s] Passed.
    sigsetjmp_nosave: [0.061967s] Passed.
    sigsetjmp_save: [0.061220s] Passed.
[10.743598s]

lib/libc/setjmp/t_sigstack (262/986): 4 test cases
    compat13_setjmp: Apr 24 07:29:22 armv7 ntpd[198]: error resolving pool 2.netbsd.pool.ntp.org: Temporary failure in name resolution (2)
[1.010904s] Failed: Test program received signal 11 (core dumped)
    compat13_sigsetjmp: [0.997175s] Failed: Test program received signal 11 (core dumped)
    setjmp: [0.063601s] Passed.
    sigsetjmp: [0.063928s] Passed.
[2.168248s]

(Don't have the full test output.  The ntpd log message is almost certainly unrelated.)
>How-To-Repeat:
cd /usr/tests/lib/libc/setjmp
atf-run | atf-report
>Fix:
Yes, please!