toolchain/57585: gdb lost 'target kvm' support

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         57585
>Category:       toolchain
>Synopsis:       gdb lost 'target kvm' support
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Aug 13 20:15:00 +0000 2023
>Originator:     Thomas Klausner
>Release:        NetBSD 10.99.7
>Organization:

>Environment:
Architecture: x86_64
Machine: amd64
>Description:
gdb 13.2 (built on Aug 11) doesn't work with kernel core dumps:                                                                                                                                               
(gdb) target kvm netbsd.40.core                                                                                                                                                                                    
Undefined target command: "kvm netbsd.40.core".  Try "help target". 
>How-To-Repeat:
Try 'target kvm' in gdb.
>Fix:
Please.

It still worked in a gdb 11.0.50 from July.

>Unformatted: