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-rw-r--r--arch/mn10300/lib/usercopy.c142
1 files changed, 0 insertions, 142 deletions
diff --git a/arch/mn10300/lib/usercopy.c b/arch/mn10300/lib/usercopy.c
deleted file mode 100644
index 39626912de98..000000000000
--- a/arch/mn10300/lib/usercopy.c
+++ /dev/null
@@ -1,142 +0,0 @@
-/* MN10300 Userspace accessor functions
- *
- * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
- * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/uaccess.h>
-
-/*
- * Copy a null terminated string from userspace.
- */
-#define __do_strncpy_from_user(dst, src, count, res) \
-do { \
- int w; \
- asm volatile( \
- " mov %1,%0\n" \
- " cmp 0,%1\n" \
- " beq 2f\n" \
- "0:\n" \
- " movbu (%5),%2\n" \
- "1:\n" \
- " movbu %2,(%6)\n" \
- " inc %5\n" \
- " inc %6\n" \
- " cmp 0,%2\n" \
- " beq 2f\n" \
- " add -1,%1\n" \
- " bne 0b\n" \
- "2:\n" \
- " sub %1,%0\n" \
- "3:\n" \
- " .section .fixup,\"ax\"\n" \
- "4:\n" \
- " mov %3,%0\n" \
- " jmp 3b\n" \
- " .previous\n" \
- " .section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,4b\n" \
- " .long 1b,4b\n" \
- " .previous" \
- :"=&r"(res), "=r"(count), "=&r"(w) \
- :"i"(-EFAULT), "1"(count), "a"(src), "a"(dst) \
- : "memory", "cc"); \
-} while (0)
-
-long
-strncpy_from_user(char *dst, const char *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-
-
-/*
- * Clear a userspace memory
- */
-#define __do_clear_user(addr, size) \
-do { \
- int w; \
- asm volatile( \
- " cmp 0,%0\n" \
- " beq 1f\n" \
- " clr %1\n" \
- "0: movbu %1,(%3,%2)\n" \
- " inc %3\n" \
- " cmp %0,%3\n" \
- " bne 0b\n" \
- "1:\n" \
- " sub %3,%0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .balign 4\n" \
- " .long 0b,3b\n" \
- ".previous\n" \
- : "+r"(size), "=&r"(w) \
- : "a"(addr), "d"(0) \
- : "memory", "cc"); \
-} while (0)
-
-unsigned long
-__clear_user(void *to, unsigned long n)
-{
- __do_clear_user(to, n);
- return n;
-}
-
-unsigned long
-clear_user(void *to, unsigned long n)
-{
- if (access_ok(VERIFY_WRITE, to, n))
- __do_clear_user(to, n);
- return n;
-}
-
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-long strnlen_user(const char *s, long n)
-{
- unsigned long res, w;
-
- if (!__addr_ok(s))
- return 0;
-
- if (n < 0 || n + (u_long) s > current_thread_info()->addr_limit.seg)
- n = current_thread_info()->addr_limit.seg - (u_long)s;
-
- asm volatile(
- "0: cmp %4,%0\n"
- " beq 2f\n"
- "1: movbu (%0,%3),%1\n"
- " inc %0\n"
- " cmp 0,%1\n"
- " beq 3f\n"
- " bra 0b\n"
- "2: clr %0\n"
- "3:\n"
- ".section .fixup,\"ax\"\n"
- "4: jmp 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .balign 4\n"
- " .long 1b,4b\n"
- ".previous\n"
- :"=d"(res), "=&r"(w)
- :"0"(0), "a"(s), "r"(n)
- : "memory", "cc");
- return res;
-}