Changeset ed7e057 in mainline for kernel/generic/src/proc/thread.c

Timestamp:

2024-01-16T15:46:47Z (16 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master

Children:

29029ac0, a5b5f17

Parents:

4ed7870

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-15 20:09:30)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2024-01-16 15:46:47)

Message:

Add functions context_create(), context_replace() and context_swap()

and use them where appropriate, removing context_save() in the process.
Much like in userspace, context_swap() maintains natural control flow
as opposed to context_save()'s return-twice mechanic.

Beyond that, in the future, context_replace() and context_swap()
can be implemented more efficiently than the context_save()/
context_restore() pair. As of now, the original implementation is
retained.

File:

• kernel/generic/src/proc/thread.c (modified) (2 diffs)

kernel/generic/src/proc/thread.c

@@ -60 +60 @@
 #include <arch/interrupt.h>
 #include <smp/ipi.h>
-#include <arch/faddr.h>
 #include <atomic.h>
 #include <memw.h>
@@ -310 +309 @@
         irq_spinlock_unlock(&tidlock, true);
 
-        memset(&thread->saved_context, 0, sizeof(thread->saved_context));
-        context_set(&thread->saved_context, FADDR(cushion),
-            (uintptr_t) thread->kstack, STACK_SIZE);
+        context_create(&thread->saved_context, cushion, thread->kstack, STACK_SIZE);
 
         current_initialize((current_t *) thread->kstack);