5 files changed, 61 insertions, 1 deletions
diff --git a/kernel/Makefile b/kernel/Makefile
index a2cee11..b51532e 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -16,7 +16,8 @@ LDFLAGS += -z max-page-size=4096 --export-dynamic
 LOADLIBES := -lgcc
 
 SOBJS := 
-GOBJS := entry_efi.o kprint.o serial.o port.o main.o
+GOBJS := entry_efi.o kprint.o serial.o port.o main.o memory.o \
+	 memset.o memcpy.o memmove.o memcmp.o 
 IOBJS :=
 
 $(SOBJS): CFLAGS += -fPIC
diff --git a/kernel/memcmp.c b/kernel/memcmp.c
new file mode 100644
index 0000000..2348afe
--- /dev/null
+++ b/kernel/memcmp.c
@@ -0,0 +1,16 @@
+/* Public domain.  */
+#include <stddef.h>
+
+int
+memcmp (const void *str1, const void *str2, size_t count)
+{
+  const unsigned char *s1 = str1;
+  const unsigned char *s2 = str2;
+
+  while (count-- > 0)
+    {
+      if (*s1++ != *s2++)
+	  return s1[-1] < s2[-1] ? -1 : 1;
+    }
+  return 0;
+}
diff --git a/kernel/memcpy.c b/kernel/memcpy.c
new file mode 100644
index 0000000..58b1e40
--- /dev/null
+++ b/kernel/memcpy.c
@@ -0,0 +1,12 @@
+/* Public domain.  */
+#include <stddef.h>
+
+void *
+memcpy (void *dest, const void *src, size_t len)
+{
+  char *d = dest;
+  const char *s = src;
+  while (len--)
+    *d++ = *s++;
+  return dest;
+}
diff --git a/kernel/memmove.c b/kernel/memmove.c
new file mode 100644
index 0000000..fd06bb6
--- /dev/null
+++ b/kernel/memmove.c
@@ -0,0 +1,20 @@
+/* Public domain.  */
+#include <stddef.h>
+
+void *
+memmove (void *dest, const void *src, size_t len)
+{
+  char *d = dest;
+  const char *s = src;
+  if (d < s)
+    while (len--)
+      *d++ = *s++;
+  else
+    {
+      const char *lasts = s + (len-1);
+      char *lastd = d + (len-1);
+      while (len--)
+        *lastd-- = *lasts--;
+    }
+  return dest;
+}
diff --git a/kernel/memset.c b/kernel/memset.c
new file mode 100644
index 0000000..3e7025e
--- /dev/null
+++ b/kernel/memset.c
@@ -0,0 +1,11 @@
+/* Public domain.  */
+#include <stddef.h>
+
+void *
+memset (void *dest, int val, size_t len)
+{
+  unsigned char *ptr = dest;
+  while (len-- > 0)
+    *ptr++ = val;
+  return dest;
+}