[PATCH] uml: separate libc-dependent uaccess code

The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all systemcalls from uaccess_user.c file under os-Linux dir

Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
new file mode 100644
index 000000000000..38d710158c3d
--- /dev/null
+++ b/arch/um/os-Linux/uaccess.c
@@ -0,0 +1,32 @@
+/*
+ * 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>
+
+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;
+}
+