vm-intro basic code

vm-intro/Makefile

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+
+all: va
+
+clean:
+	rm -f va
+
+va: va.c
+	gcc -o va va.c -Wall
+

vm-intro/README.md

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+# Overview
+
+Code from OSTEP chapter [The Abstraction: Address Spaces](http://pages.cs.wisc.edu/~remzi/OSTEP/vm-intro.pdf).
+
+To compile, just type:
+```
+prompt> make
+```
+
+See the highly primitive `Makefile` for details.
+
+Then, run it:
+
+```
+prompt> ./virtual-addresses
+```
+

vm-intro/va.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+    printf("location of code  : %p\n", main);
+    printf("location of heap  : %p\n", malloc(1));
+    int x = 3;
+    printf("location of stack : %p\n", &x);
+    return 0;
+}
+