thread: thread-switch the real-mode stack, too

When this code was originally written, we didn't have lmalloc().  Now
when lmalloc() is implemented, let each real-mode task have its own
stack.

Note that this means we absolutely have to continue to support the
SS != CS, DS model in the real-mode code, which should already be the
case, but...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/core/include/thread.h b/core/include/thread.h
index 704962e1..b283424d 100644
--- a/core/include/thread.h
+++ b/core/include/thread.h
@@ -26,6 +26,7 @@ struct thread {
     const char *name;		/* Name (for debugging) */
     struct thread_list  list;
     struct thread_block *blocked;
+    void *stack, *rmstack;	/* Stacks, iff allocated by malloc/lmalloc */
     void *pvt; 			/* For the benefit of lwIP */
     int prio;
 };