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authorGennady Sharapov <Gennady.V.Sharapov@intel.com>2005-11-07 00:58:50 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:31 -0800
commitbb578426253ab9950cc20b4e5dd6aefb5500144f (patch)
treecd1b874512440f739dc555a40efb5edd51de275b /arch/um/os-Linux/uaccess.c
parent0e76422ca5f34bb43b97c0945646ef072bcc1776 (diff)
downloadblackbird-op-linux-bb578426253ab9950cc20b4e5dd6aefb5500144f.tar.gz
blackbird-op-linux-bb578426253ab9950cc20b4e5dd6aefb5500144f.zip
[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>
Diffstat (limited to 'arch/um/os-Linux/uaccess.c')
-rw-r--r--arch/um/os-Linux/uaccess.c32
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;
+}
+
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