Lots of hacking to make a very simple "ls" utility.

I added a dead-simple malloc that only allows allocations < 4096 bytes.
It just forwards the request to mmap() every time.

I also added simplified versions of opendir() and readdir().

LibC/stdlib.cpp

@@ -0,0 +1,24 @@
+#include "stdlib.h"
+#include "mman.h"
+
+extern "C" {
+
+void* malloc(size_t size)
+{
+    if (size > 4096) {
+        volatile char* crashme = (char*)0xc007d00d;
+        *crashme = 0;
+    }
+    void* ptr = mmap(nullptr, 4096);
+    return ptr;
+}
+
+void free(void* ptr)
+{
+    if (!ptr)
+        return;
+    munmap(ptr, 4096);
+}
+
+}
+