Inherit fpu control word from parent to child

* i386/i386/thread.h (struct pcb): Add init_control field.
* i386/i386/fpu.h (fpinherit): New prototype.
* i386/i386/fpu.c (fpinit): Add thread parameter. When init_control field is
set, use that value instead of a hardcoded one.
(fpinherit): New function.
(fp_load): Pass thread parameter to fpinit().
* kern/thread.c (thread_create): Pass parent task to pcb_init().
* i386/i386/pcb.c (pcb_init): Add parent_task parameter, call fpinherit when
it is equal to current_task().

1 files changed, 1 insertions, 1 deletions

diff --git a/kern/thread.c b/kern/thread.c
index d8d6af57..a2ec3d31 100644
--- a/kern/thread.c
+++ b/kern/thread.c
@@ -440,7 +440,7 @@ kern_return_t thread_create(
 	 *	Create a pcb.  The kernel stack is created later,
 	 *	when the thread is swapped-in.
 	 */
-	pcb_init(new_thread);
+	pcb_init(parent_task, new_thread);
 
 	ipc_thread_init(new_thread);