From f4a46ce9f1255489db4f80dea99887b062b6b89a Mon Sep 17 00:00:00 2001
From: Fabio Scotto di Santolo <fabio.scottodisantolo@gmail.com>
Date: Thu, 10 Oct 2024 18:37:22 +0200
Subject: [PATCH] Exercise 8.32

---
 chp8_memory/mem/.gitignore |  1 +
 chp8_memory/mem/Makefile   | 11 +++++++++++
 chp8_memory/mem/main.c     | 19 +++++++++++++++++++
 3 files changed, 31 insertions(+)
 create mode 100644 chp8_memory/mem/.gitignore
 create mode 100644 chp8_memory/mem/Makefile
 create mode 100644 chp8_memory/mem/main.c

diff --git a/chp8_memory/mem/.gitignore b/chp8_memory/mem/.gitignore
new file mode 100644
index 0000000..9f5c0b2
--- /dev/null
+++ b/chp8_memory/mem/.gitignore
@@ -0,0 +1 @@
+mem
diff --git a/chp8_memory/mem/Makefile b/chp8_memory/mem/Makefile
new file mode 100644
index 0000000..7542387
--- /dev/null
+++ b/chp8_memory/mem/Makefile
@@ -0,0 +1,11 @@
+CC=gcc
+CFLAGS=-Wall -o mem
+SRCS=main.c
+
+build:
+	$(CC) $(CFLAGS) $(SRCS)
+debug:
+	$(CC) $(CFLAGS) -fsanitize=address -static-libasan -ggdb $(SRCS)
+	gdb -q mem
+clean:
+	rm -f mem
diff --git a/chp8_memory/mem/main.c b/chp8_memory/mem/main.c
new file mode 100644
index 0000000..7fcc079
--- /dev/null
+++ b/chp8_memory/mem/main.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char *argv[]) {
+  if (argc < 2) {
+    printf("Usage: mem <ADDRESS>\n");
+    return EXIT_FAILURE;
+  }
+
+  const unsigned long n = atoi(argv[1]);
+  const unsigned long page = n >> 12;            // equal to n / 2^12
+  const unsigned long offset = n - (page << 12); // equal to n - (page * 2^12)
+
+  printf("The address %lu contains:\n", n);
+  printf("page number = %lu\n", page);
+  printf("offset = %lu\n", offset);
+
+  return EXIT_SUCCESS;
+}