From 59bd979548320bb8e82fec03dc5e5ccb3adcf828 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Wed, 22 Jun 1994 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1994-06-22

---
 pc/fns.h       | 1 +
 pc/l.s         | 4 ++++
 port/error.h   | 1 +
 port/sysfile.c | 3 ++-
 4 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/pc/fns.h b/pc/fns.h
index 1a7e474ab462bd753b538384d61b2e05c409b7ce..d201df41e2c63b95de4efbe9e20db5db40c10009 100644
--- a/pc/fns.h
+++ b/pc/fns.h
@@ -25,6 +25,7 @@ void	fpsave(FPsave*);
 ulong	fpstatus(void);
 ulong	getcr0(void);
 ulong	getcr2(void);
+ulong	getcr3(void);
 char*	getconf(char*);
 ulong	getstatus(void);
 void	hardclock(void);
diff --git a/pc/l.s b/pc/l.s
index cc8f08a96076c0e6eb3c190faab6130a0ad55bcd..4edc6485fa5cc42fc00d1d389e6945e61d67aebf 100644
--- a/pc/l.s
+++ b/pc/l.s
@@ -289,6 +289,10 @@ TEXT	getcr2(SB),$0		/* fault address */
 	MOVL	CR2,AX
 	RET
 
+TEXT	getcr3(SB),$0		/* page directory base */
+	MOVL	CR3,AX
+	RET
+
 #define	FPOFF\
 	WAIT;\
 	MOVL	CR0,AX;\
diff --git a/port/error.h b/port/error.h
index 005a40c1bd262bcc1f1d46d6b03501e1ea59670f..789686bc1da6546f4961c11f357865126455cb42 100644
--- a/port/error.h
+++ b/port/error.h
@@ -53,3 +53,4 @@ extern char Erecover[];		/* failed to recover fd */
 extern char Eshort[];		/* i/o count too small */
 extern char Enobitstore[];	/* out of screen memory */
 extern char Egreg[];		/* coherency problem */
+extern char Ebadspec[];		/* bad attach specifier */
diff --git a/port/sysfile.c b/port/sysfile.c
index 299273883ed9a8e46e092ab9c651f4372b5fd075..2e8bf5ddafdae329b07a7448793c0e6a669ccfa7 100644
--- a/port/sysfile.c
+++ b/port/sysfile.c
@@ -548,7 +548,8 @@ bindmount(ulong *arg, int ismount)
 			error(Ebadarg);
 
 		bogus.spec = (char*)arg[3];
-		nameok(bogus.spec);
+		if(strchr(bogus.spec, ' '))
+			error(Ebadspec);
 
 		ret = devno('M', 0);
 		c0 = (*devtab[ret].attach)((char*)&bogus);