initial commit

currently with:
booted via multiboot 1
protected mode to long mode boostrap code
vga used for outputting
gdt and idt set up
identity paging for the whole memory reported by multiboot
pic and ps/2 set up
acpi code exists but is broken

1 files changed, 26 insertions, 0 deletions

diff --git a/src/mem.c b/src/mem.c
new file mode 100644
index 0000000..dd302fb
--- /dev/null
+++ b/src/mem.c
@@ -0,0 +1,26 @@
+#include <mem.h>
+#include <stdint.h>
+
+void *memcpy(void *restrict dest, const void *restrict src, size_t n) {
+	for (size_t i = 0; i < n; i++)
+		((char *) dest)[i] = ((char *) src)[i];
+	return dest;
+}
+
+void *memmove(void *dest, const void *src, size_t n) {
+	for (size_t i = 0; i < n; i++)
+		((char *) dest)[i] = ((char *) src)[i];
+	return dest;
+}
+
+void *memset(void *s, int c, size_t n) {
+	for (size_t i = 0; i < n; i++)
+		((char *) s)[i] = c;
+	return s;
+}
+
+int memcmp(const void *s1, const void *s2, size_t n) {
+	while (n && *(uint8_t*)s1 == *(uint8_t*)s2)
+		n--, s1++, s2++;
+	return n ? *(uint8_t*)s1 - *(uint8_t*)s2 : 0;
+}