panic: fpudna from userland

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

Hello

On NetBSD-10.0 with XEN3PAE_DOMU kernel, I get this panic when building packages:
[ 35714.4540347] panic: fpudna from userland, ip 0xbbe74f, trapframe 0xdbe1dfa8
[ 35714.4540347] cpu0: Begin traceback...
[ 35714.4540347] vpanic(c0505984,dbe1df8c,dbe1df9c,c01322bb,c0505984,c05059a8,bb
e74f,dbe1dfa8,1a62000,bf7fc880) at netbsd:vpanic+0x18e
[ 35714.4540347] panic(c0505984,c05059a8,bbe74f,dbe1dfa8,1a62000,bf7fc880,c0102f
9e,dbe1dfa8,b3,ab) at netbsd:panic+0x18
[ 35714.4540347] fpudna(dbe1dfa8,b3,ab,bac3001f,bf7f001f,b9869d00,b98ea350,bf7fc
880,1a62000,0) at netbsd:fpudna+0x3b
[ 35714.4540347] cpu0: End traceback...
[ 35714.4540347] fatal breakpoint trap in supervisor mode
[ 35714.4540347] trap type 1 code 0 eip 0xc0129304 cs 0x9 eflags 0x202 cr2 0xb98
ee014 ilevel 0 esp 0xdbe1df70
[ 35714.4540347] curlwp 0xc36ea200 pid 26009 lid 26009 lowest kstack 0xdbe1c2c0

Reading the code, the reason why we must panic here seems obscure. Anyone
can explain? 


-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost