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-rw-r--r--arch/x86_64/lib/usercopy.c166
1 files changed, 0 insertions, 166 deletions
diff --git a/arch/x86_64/lib/usercopy.c b/arch/x86_64/lib/usercopy.c
deleted file mode 100644
index 893d43f838c..00000000000
--- a/arch/x86_64/lib/usercopy.c
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * User address space access functions.
- *
- * Copyright 1997 Andi Kleen <ak@muc.de>
- * Copyright 1997 Linus Torvalds
- * Copyright 2002 Andi Kleen <ak@suse.de>
- */
-#include <linux/module.h>
-#include <asm/uaccess.h>
-
-/*
- * Copy a null terminated string from userspace.
- */
-
-#define __do_strncpy_from_user(dst,src,count,res) \
-do { \
- long __d0, __d1, __d2; \
- might_sleep(); \
- __asm__ __volatile__( \
- " testq %1,%1\n" \
- " jz 2f\n" \
- "0: lodsb\n" \
- " stosb\n" \
- " testb %%al,%%al\n" \
- " jz 1f\n" \
- " decq %1\n" \
- " jnz 0b\n" \
- "1: subq %1,%0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movq %5,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 8\n" \
- " .quad 0b,3b\n" \
- ".previous" \
- : "=r"(res), "=c"(count), "=&a" (__d0), "=&S" (__d1), \
- "=&D" (__d2) \
- : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
- : "memory"); \
-} while (0)
-
-long
-__strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res;
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-EXPORT_SYMBOL(__strncpy_from_user);
-
-long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- return __strncpy_from_user(dst, src, count);
- return res;
-}
-EXPORT_SYMBOL(strncpy_from_user);
-
-/*
- * Zero Userspace
- */
-
-unsigned long __clear_user(void __user *addr, unsigned long size)
-{
- long __d0;
- might_sleep();
- /* no memory constraint because it doesn't change any memory gcc knows
- about */
- asm volatile(
- " testq %[size8],%[size8]\n"
- " jz 4f\n"
- "0: movq %[zero],(%[dst])\n"
- " addq %[eight],%[dst]\n"
- " decl %%ecx ; jnz 0b\n"
- "4: movq %[size1],%%rcx\n"
- " testl %%ecx,%%ecx\n"
- " jz 2f\n"
- "1: movb %b[zero],(%[dst])\n"
- " incq %[dst]\n"
- " decl %%ecx ; jnz 1b\n"
- "2:\n"
- ".section .fixup,\"ax\"\n"
- "3: lea 0(%[size1],%[size8],8),%[size8]\n"
- " jmp 2b\n"
- ".previous\n"
- ".section __ex_table,\"a\"\n"
- " .align 8\n"
- " .quad 0b,3b\n"
- " .quad 1b,2b\n"
- ".previous"
- : [size8] "=c"(size), [dst] "=&D" (__d0)
- : [size1] "r"(size & 7), "[size8]" (size / 8), "[dst]"(addr),
- [zero] "r" (0UL), [eight] "r" (8UL));
- return size;
-}
-EXPORT_SYMBOL(__clear_user);
-
-unsigned long clear_user(void __user *to, unsigned long n)
-{
- if (access_ok(VERIFY_WRITE, to, n))
- return __clear_user(to, n);
- return n;
-}
-EXPORT_SYMBOL(clear_user);
-
-/*
- * 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 __user *s, long n)
-{
- long res = 0;
- char c;
-
- while (1) {
- if (res>n)
- return n+1;
- if (__get_user(c, s))
- return 0;
- if (!c)
- return res+1;
- res++;
- s++;
- }
-}
-EXPORT_SYMBOL(__strnlen_user);
-
-long strnlen_user(const char __user *s, long n)
-{
- if (!access_ok(VERIFY_READ, s, n))
- return 0;
- return __strnlen_user(s, n);
-}
-EXPORT_SYMBOL(strnlen_user);
-
-long strlen_user(const char __user *s)
-{
- long res = 0;
- char c;
-
- for (;;) {
- if (get_user(c, s))
- return 0;
- if (!c)
- return res+1;
- res++;
- s++;
- }
-}
-EXPORT_SYMBOL(strlen_user);
-
-unsigned long copy_in_user(void __user *to, const void __user *from, unsigned len)
-{
- if (access_ok(VERIFY_WRITE, to, len) && access_ok(VERIFY_READ, from, len)) {
- return copy_user_generic((__force void *)to, (__force void *)from, len);
- }
- return len;
-}
-EXPORT_SYMBOL(copy_in_user);
-