1 files changed, 33 insertions, 0 deletions
diff --git a/memory/bump.c b/memory/bump.c
new file mode 100644
index 0000000..a6b0228
--- /dev/null
+++ b/memory/bump.c
@@ -0,0 +1,33 @@
+#include "bump.h"
+#include "memory.h"
+
+static void *s_next_free;
+
+void*
+bump_where(void)
+{
+    return s_next_free;
+}
+
+void *bump_alloc(size_t size)
+{
+    void *ret = s_next_free;
+    s_next_free = (void*)((uintptr_t)s_next_free + size);
+    vm_ensure(
+            (uintptr_t)ret,
+            (uintptr_t)s_next_free,
+            (page_flags_t) {
+                .present = true,
+                .writeable = true,
+                .useraccess = false,
+                .executable = false
+            });
+    return ret;
+}
+
+void
+bump_setup(void)
+{
+    extern void *_kernel_end;
+    s_next_free = (void*)&_kernel_end;
+}