From 18998096701a1d4695b2097006d7afc2a539bd89 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Fri, 8 Sep 2023 09:24:27 -0400
Subject: 3rd lab
---
user/ulib.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
(limited to 'user/ulib.c')
diff --git a/user/ulib.c b/user/ulib.c
index c7b66c4..871adc9 100644
--- a/user/ulib.c
+++ b/user/ulib.c
@@ -1,8 +1,13 @@
#include "kernel/types.h"
#include "kernel/stat.h"
#include "kernel/fcntl.h"
+#ifdef LAB_PGTBL
+#include "kernel/riscv.h"
+#include "kernel/memlayout.h"
+#endif
#include "user/user.h"
+
//
// wrapper so that it's OK if main() does not call exit().
//
@@ -145,3 +150,12 @@ memcpy(void *dst, const void *src, uint n)
{
return memmove(dst, src, n);
}
+
+#ifdef LAB_PGTBL
+int
+ugetpid(void)
+{
+ struct usyscall *u = (struct usyscall *)USYSCALL;
+ return u->pid;
+}
+#endif
--
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