diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2011-06-06 13:19:30 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2011-06-06 13:19:30 +0000 |
| commit | b97269c7302cd15ad50a2953cac973299c02e3c2 (patch) | |
| tree | 61648d7c24ab26f0ac3dfa1bcc9a4feecef20271 /sys | |
| parent | 7cfef195cbdc64bb24b5240b10ab25498d49cb73 (diff) | |
Set FEF bit in the %fprs register when handling an fp_disabled trap from
userland. Prevents userland applications from trapping forever on the next
floating point instruction executed after clearing this flag. Fixes issues
with threaded applications, sinc our pthreads library clears the FEF bit
under some circumstances.
ok miod@, tested by ajacoutot@
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/sparc64/sparc64/trap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/arch/sparc64/sparc64/trap.c b/sys/arch/sparc64/sparc64/trap.c index d5e4bc32f7c..ed9dde460ef 100644 --- a/sys/arch/sparc64/sparc64/trap.c +++ b/sys/arch/sparc64/sparc64/trap.c @@ -1,4 +1,4 @@ -/* $OpenBSD: trap.c,v 1.67 2011/04/03 14:56:28 guenther Exp $ */ +/* $OpenBSD: trap.c,v 1.68 2011/06/06 13:19:29 kettenis Exp $ */ /* $NetBSD: trap.c,v 1.73 2001/08/09 01:03:01 eeh Exp $ */ /* @@ -606,6 +606,7 @@ badtrap: uvmexp.fpswtch++; } tf->tf_tstate |= (PSTATE_PEF<<TSTATE_PSTATE_SHIFT); + sparc_wr(fprs, FPRS_FEF, 0); break; } |