Re: port-cobalt/53090: lib/libc/gen/t_fpsetmask test cases panic

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

The following reply was made to PR port-cobalt/53090; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-cobalt-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost
Subject: Re: port-cobalt/53090: lib/libc/gen/t_fpsetmask test cases panic
Date: Mon, 12 Mar 2018 11:31:08 +0100

 On Mon, Mar 12, 2018 at 02:20:01AM +0000, venture37%geeklan.co.uk@localhost wrote:
 > >Description:
 > When running the test suite, the system panics when running the lib/libc/gen/t_fpsetmask tetsts on NetBSD/cobalt.
 > 
 > 
 > bt
 > pcu_save+9c
 > mips_emul_fp+205c
 > mips_fpu_intr+c8
 > trap+6ac
 > mips3_user_gen_exception+d8
 
 I guess pcu_save() is actuually called via fpu_save(), which is called
 from mips/fp.S.
 But fp.S looks broken in here. fpu_save() expects a lwp pointer in a0
 (probably curlwp in this case), but I can't see where a0 would contain a
 lwp pointer here. It looks like a0 has the emulated instruction.
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --