Userspace dlmalloc port, supporting syscalls mman_map()/mman_unmap()

user/tb/main.c

@@ -1,5 +1,11 @@
 #include <uprintf.h>
+#include <dlmalloc/malloc.h>
 
 void main(void) {
   uprintf("Hello from tb!\n");
+
+  int *tmp = dlmalloc(sizeof(*tmp) * 1024);
+  *tmp = 123456;
+  uprintf("*tmp = %d\n", *tmp);
+  dlfree(tmp);
 }