Initial commit. We have a booting kernel

libc/string/memcmp.c

@@ -0,0 +1,17 @@
+#include <string.h>
+
+int memcmp(const void* s1, const void* s2, size_t n)
+{
+	const unsigned char* a = s1;
+	const unsigned char* b = s2;
+
+	while (n--)
+	{
+		if (*a != *b)
+			return *a - *b;
+		a++;
+		b++;
+	}
+
+	return 0;
+}

libc/string/memcpy.c

@@ -0,0 +1,10 @@
+#include <string.h>
+
+void* memcpy(void* restrict destp, const void* restrict srcp, size_t n)
+{
+	unsigned char* dest = (unsigned char*)destp;
+	const unsigned char* src = (const unsigned char*)srcp;
+	for (size_t i = 0; i < n; i++)
+		dest[i] = src[i];
+	return destp;
+}

libc/string/memmove.c

@@ -0,0 +1,20 @@
+#include <string.h>
+
+void* memmove(void* destp, const void* srcp, size_t n)
+{
+	unsigned char* dest = (unsigned char*)destp;
+	const unsigned char* src = (const unsigned char*)srcp;
+
+	if (dest < src)
+	{
+		for (size_t i = 0; i < n; i++)
+			dest[i] = src[i];
+	}
+	else
+	{
+		for (size_t i = 1; i <= n; i++)
+			dest[n - i] = src[n - i];
+	}
+
+	return destp;
+}

libc/string/memset.c

@@ -0,0 +1,9 @@
+#include <string.h>
+
+void* memset(void* s, int c, size_t n)
+{
+	unsigned char* p = (unsigned char*)s;
+	for (size_t i = 0; i < n; i++)
+		p[i] = c;
+	return s;
+}

libc/string/strlen.c

@@ -0,0 +1,9 @@
+#include <string.h>
+
+size_t strlen(const char* str)
+{
+	size_t len = 0;
+	while (str[len])
+		len++;
+	return len;
+}