From 021ea9b271f2144f7b16ae41a9236292dea7897d Mon Sep 17 00:00:00 2001
From: Benji Dial <benji3.141@gmail.com>
Date: Sun, 24 May 2020 21:55:12 -0400
Subject: basic fs type stuff, fat16, removing stack segment and using data
 segment

---
 src/kernel/util.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'src/kernel/util.c')

diff --git a/src/kernel/util.c b/src/kernel/util.c
index df6e7d8..c7a5035 100644
--- a/src/kernel/util.c
+++ b/src/kernel/util.c
@@ -2,8 +2,15 @@
 #include "panic.h"
 #include <stdbool.h>
 
-void memcpy(void *from, void *to, uint32_t n) {
-  panic("Not implemented (memcpy).");
+void memcpy(void *to, void *from, uint32_t n) {
+  uint32_t *tp = to, *fp = from;
+  while (n >= 4) {
+    *(tp++) = *(fp++);
+    n -= 4;
+  }
+  uint8_t *tpp = (uint8_t *)tp, *fpp = (uint8_t *)fp;
+  while (n--)
+    *(tpp++) = *(fpp++);
 }
 
 void u32_dec(uint32_t n, uint8_t *b) {
-- 
cgit v1.2.3