Added memory management using paging

This was quite a roller-coaster and most things are slower now, but it works and is way more secure. I still need to implement things like shared memory for the WM/GUI system but other than that everything is supported.

1 files changed, 11 insertions, 11 deletions

diff --git a/libgui/msg.c b/libgui/msg.c
index 8448e73..3f58267 100644
--- a/libgui/msg.c
+++ b/libgui/msg.c
@@ -5,23 +5,23 @@
 #include <print.h>
 #include <sys.h>
 
-int msg_send(u32 pid, enum message_type type, void *data)
+int msg_send(u32 pid, enum message_type type, void *data, u32 size)
 {
-	struct message msg = { 0 };
-	assert((signed)pid != -1);
+	assert((signed)pid != -1 && size >= sizeof(struct message_header));
 	char path[32] = { 0 };
 	sprintf(path, "/proc/%d/msg", pid);
-	msg.magic = MSG_MAGIC;
-	msg.src = getpid();
-	msg.type = type;
-	msg.data = data;
-	return write(path, &msg, 0, sizeof(msg));
+	struct message_header *header = data;
+	header->magic = MSG_MAGIC;
+	header->src = getpid();
+	header->type = type;
+	return write(path, data, 0, size);
 }
 
-int msg_receive(struct message *msg)
+int msg_receive(void *buf, u32 size)
 {
-	int ret = read("/proc/self/msg", msg, 0, sizeof(*msg));
-	if (msg->magic == MSG_MAGIC && ret == sizeof(*msg))
+	int ret = read("/proc/self/msg", buf, 0, size);
+	struct message_header *header = buf;
+	if (header->magic == MSG_MAGIC)
 		return ret;
 	else
 		return -1;