re: kern/58811: riscv64 cannot run "systat vm"

["matthew green via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/58811; it has been noted by GNATS.

From: matthew green <mrg%eterna23.net@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: re: kern/58811: riscv64 cannot run "systat vm"
Date: Wed, 06 Nov 2024 20:13:45 +1100

 this is really weird.
 
 i saw the same problem in my risc64 vm.  then i patched the call
 to kvm_nlist() to have the only "necessary" one (allevents) to be
 first in the struct nlist[], and then it worked.  reading the code
 this shouldn't happen, and it should find "allevents"
 
 then i wrote a tiny test to compare having successful symbols to
 look up in first or second array member, and it worked fine for me
 both ways.  so i removed my patch to systat/vmstat.c and put the
 "_allevents" entry back to the end...and it is still working.  it
 can see the allevents entry in "nm /dev/ksyms" as expected, so i'm
 basically really confused what is happening here, and now i can't
 reproduce the original problem.  (is there a chance it was broken,
 and recently fixed?  i *did* upgrade my VM since i was building
 new -current fixes, so i did change a lot..)
 
 
 note, the "_" prefix is related to the original a.out version,
 where those were the actual symbols names in the text.  for ELF,
 we ignore the leading "_" in the lookup.
 
 
 .mrg.