sched: thread: implement cloning of userspace thread contexts

2026-04-01 18:29:54 +01:00
parent 61050fd54b
commit 6c5bf2344f
4 changed files with 66 additions and 0 deletions
@@ -80,6 +80,21 @@ extern kern_status_t ml_thread_prepare_user_context(
 	return KERN_OK;
 }

+kern_status_t ml_thread_clone_user_context(
+	const struct ml_cpu_context *src_ctx,
+	uintptr_t return_value,
+	virt_addr_t *kernel_sp)
+{
+	(*kernel_sp) -= sizeof(struct ml_cpu_context);
+
+	struct ml_cpu_context *ctx = (struct ml_cpu_context *)(*kernel_sp);
+	memcpy(ctx, src_ctx, sizeof *ctx);
+
+	ctx->rax = return_value;
+
+	return KERN_OK;
+}
+
 kern_status_t ml_thread_config_get(
 	struct thread *thread,
 	kern_config_key_t key,