Changeset edc64c0 in mainline

Timestamp:

2018-07-17T22:42:57Z (6 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9b1baac

Parents:

58093d9

Message:

Zero out new thread's register context

This removes the information leak in which the new thread inherited some
register values from the thread which created it. Also, now each thread
begins execution with a well-defined register state.

File:

• kernel/generic/src/proc/thread.c (modified) (1 diff)

kernel/generic/src/proc/thread.c

@@ -352 +352 @@
         irq_spinlock_unlock(&tidlock, true);
 
-        context_save(&thread->saved_context);
+        memset(&thread->saved_context, 0, sizeof(thread->saved_context));
         context_set(&thread->saved_context, FADDR(cushion),
             (uintptr_t) thread->kstack, STACK_SIZE);