diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2004-06-22 23:00:16 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2004-06-22 23:00:16 +0000 |
| commit | ac41f72cfb5fcff54aefd94138a2ac29e19d060b (patch) | |
| tree | b502b166dd85c00abac9889a29f307205b5e1546 /sys | |
| parent | e536bc7c874452cef9c8c9f24d93a7972b756e8c (diff) | |
During exception processing, we are not supposed to fault immediately
after re-enabling the FPU (unless exception handling code is suffering
from bugs, of course).
Should this happen, invoke the error fault handler, but at least clear
the exception state first, so that it gets a chance to run.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arch/mvme88k/mvme88k/eh.S | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sys/arch/mvme88k/mvme88k/eh.S b/sys/arch/mvme88k/mvme88k/eh.S index e8178194dba..4e97857437a 100644 --- a/sys/arch/mvme88k/mvme88k/eh.S +++ b/sys/arch/mvme88k/mvme88k/eh.S @@ -1,4 +1,4 @@ -/* $OpenBSD: eh.S,v 1.53 2004/06/22 18:27:08 miod Exp $ */ +/* $OpenBSD: eh.S,v 1.54 2004/06/22 23:00:15 miod Exp $ */ /* * Mach Operating System * Copyright (c) 1993-1991 Carnegie Mellon University @@ -2371,7 +2371,16 @@ ASLOCAL(m88110_use_SR3_pcb) * use it as scratch storage. */ #if 1 - br _C_LABEL(m88110_error_handler) + ldcr TMP, PSR + clr TMP, TMP, 1<PSR_FPU_DISABLE_BIT> /* enable the FPU */ + clr TMP, TMP, 1<PSR_SHADOW_FREEZE_BIT> /* and shadowing */ + stcr TMP, EPSR + + or.u TMP, r0, hi16(_C_LABEL(m88110_error_handler)) + or TMP, TMP, lo16(_C_LABEL(m88110_error_handler)) + stcr TMP, EXIP + + RTE #else /* Testing!!! */ xcr r30, r30, SR3 /* r30 = old exception frame */ |