rts: Introduce and use ExecPage abstraction

Here we introduce a very thin abstraction for allocating, filling, and
freezing executable pages to replace allocateExec.

1 files changed, 18 insertions, 0 deletions

diff --git a/includes/rts/ExecPage.h b/includes/rts/ExecPage.h
new file mode 100644
index 0000000000..4261b71259
--- /dev/null
+++ b/includes/rts/ExecPage.h
@@ -0,0 +1,18 @@
+/*
+ * Utilities for managing dynamically-allocated executable pages.
+ */
+
+#pragma once
+
+typedef struct {
+    char contents;
+} ExecPage;
+
+/* Allocate a writable page. */
+ExecPage *allocateExecPage(void);
+
+/* Make a page previously allocated by allocateExecPage. */
+void freezeExecPage(ExecPage *page);
+
+/* Free a page previously allocated by allocateExecPage. */
+void freeExecPage(ExecPage *page);