1 files changed, 64 insertions, 0 deletions
diff --git a/arch/um/kernel/uaccess_user.c b/arch/um/kernel/uaccess_user.c
new file mode 100644
index 000000000000..d035257ed0af
--- /dev/null
+++ b/arch/um/kernel/uaccess_user.c
@@ -0,0 +1,64 @@
+/* 
+ * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <setjmp.h>
+#include <string.h>
+
+/* These are here rather than tt/uaccess.c because skas mode needs them in
+ * order to do SIGBUS recovery when a tmpfs mount runs out of room.
+ */
+
+unsigned long __do_user_copy(void *to, const void *from, int n,
+			     void **fault_addr, void **fault_catcher,
+			     void (*op)(void *to, const void *from,
+					int n), int *faulted_out)
+{
+	unsigned long *faddrp = (unsigned long *) fault_addr, ret;
+
+	sigjmp_buf jbuf;
+	*fault_catcher = &jbuf;
+	if(sigsetjmp(jbuf, 1) == 0){
+		(*op)(to, from, n);
+		ret = 0;
+		*faulted_out = 0;
+	} 
+	else {
+		ret = *faddrp;
+		*faulted_out = 1;
+	}
+	*fault_addr = NULL;
+	*fault_catcher = NULL;
+	return ret;
+}
+
+void __do_copy(void *to, const void *from, int n)
+{
+	memcpy(to, from, n);
+}	
+
+
+int __do_copy_to_user(void *to, const void *from, int n,
+		      void **fault_addr, void **fault_catcher)
+{
+	unsigned long fault;
+	int faulted;
+
+	fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
+			       __do_copy, &faulted);
+	if(!faulted) return(0);
+	else return(n - (fault - (unsigned long) to));
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */