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Don't try to save FP state if npxproc is null.

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Submitted by:	Tor Egge
This commit is contained in:
Jonathan Lemon 1998-10-01 20:45:28 +00:00
parent 31a7e0032c
commit 582b2d100e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39872
1 changed files with 3 additions and 1 deletions
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4
sys/i386/i386/vm86bios.s
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@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: vm86bios.s,v 1.5 1998/09/28 03:26:22 tegge Exp $
* $Id: vm86bios.s,v 1.6 1998/09/29 18:01:18 jlemon Exp $
*/
#include "opt_vm86.h"
@ -75,6 +75,8 @@ ENTRY(vm86_bioscall)
movl _curproc,%ecx
cmpl %ecx,_npxproc /* do we need to save fp? */
jne 1f
testl %ecx,%ecx
je 1f /* no curproc/npxproc */
pushl %edx
movl P_ADDR(%ecx),%ecx
addl $PCB_SAVEFPU,%ecx