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-rw-r--r--include/asm-s390/uaccess.h430
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diff --git a/include/asm-s390/uaccess.h b/include/asm-s390/uaccess.h
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index be104f21c70..00000000000
--- a/include/asm-s390/uaccess.h
+++ /dev/null
@@ -1,430 +0,0 @@
-/*
- * include/asm-s390/uaccess.h
- *
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Hartmut Penner (hp@de.ibm.com),
- * Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- * Derived from "include/asm-i386/uaccess.h"
- */
-#ifndef __S390_UACCESS_H
-#define __S390_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/sched.h>
-#include <linux/errno.h>
-
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(a) ((mm_segment_t) { (a) })
-
-
-#define KERNEL_DS MAKE_MM_SEG(0)
-#define USER_DS MAKE_MM_SEG(1)
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current->thread.mm_segment)
-
-#ifdef __s390x__
-#define set_fs(x) \
-({ \
- unsigned long __pto; \
- current->thread.mm_segment = (x); \
- __pto = current->thread.mm_segment.ar4 ? \
- S390_lowcore.user_asce : S390_lowcore.kernel_asce; \
- asm volatile ("lctlg 7,7,%0" : : "m" (__pto) ); \
-})
-#else
-#define set_fs(x) \
-({ \
- unsigned long __pto; \
- current->thread.mm_segment = (x); \
- __pto = current->thread.mm_segment.ar4 ? \
- S390_lowcore.user_asce : S390_lowcore.kernel_asce; \
- asm volatile ("lctl 7,7,%0" : : "m" (__pto) ); \
-})
-#endif
-
-#define segment_eq(a,b) ((a).ar4 == (b).ar4)
-
-
-static inline int __access_ok(const void *addr, unsigned long size)
-{
- return 1;
-}
-#define access_ok(type,addr,size) __access_ok(addr,size)
-
-/*
- * The exception table consists of pairs of addresses: the first is the
- * address of an instruction that is allowed to fault, and the second is
- * the address at which the program should continue. No registers are
- * modified, so it is entirely up to the continuation code to figure out
- * what to do.
- *
- * All the routines below use bits of fixup code that are out of line
- * with the main instruction path. This means when everything is well,
- * we don't even have to jump over them. Further, they do not intrude
- * on our cache or tlb entries.
- */
-
-struct exception_table_entry
-{
- unsigned long insn, fixup;
-};
-
-#ifndef __s390x__
-#define __uaccess_fixup \
- ".section .fixup,\"ax\"\n" \
- "2: lhi %0,%4\n" \
- " bras 1,3f\n" \
- " .long 1b\n" \
- "3: l 1,0(1)\n" \
- " br 1\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,2b\n" \
- ".previous"
-#define __uaccess_clobber "cc", "1"
-#else /* __s390x__ */
-#define __uaccess_fixup \
- ".section .fixup,\"ax\"\n" \
- "2: lghi %0,%4\n" \
- " jg 1b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 8\n" \
- " .quad 0b,2b\n" \
- ".previous"
-#define __uaccess_clobber "cc"
-#endif /* __s390x__ */
-
-/*
- * These are the main single-value transfer routines. They automatically
- * use the right size if we just have the right pointer type.
- */
-#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
-#define __put_user_asm(x, ptr, err) \
-({ \
- err = 0; \
- asm volatile( \
- "0: mvcs 0(%1,%2),%3,%0\n" \
- "1:\n" \
- __uaccess_fixup \
- : "+&d" (err) \
- : "d" (sizeof(*(ptr))), "a" (ptr), "Q" (x), \
- "K" (-EFAULT) \
- : __uaccess_clobber ); \
-})
-#else
-#define __put_user_asm(x, ptr, err) \
-({ \
- err = 0; \
- asm volatile( \
- "0: mvcs 0(%1,%2),0(%3),%0\n" \
- "1:\n" \
- __uaccess_fixup \
- : "+&d" (err) \
- : "d" (sizeof(*(ptr))), "a" (ptr), "a" (&(x)), \
- "K" (-EFAULT), "m" (x) \
- : __uaccess_clobber ); \
-})
-#endif
-
-#define __put_user(x, ptr) \
-({ \
- __typeof__(*(ptr)) __x = (x); \
- int __pu_err; \
- __chk_user_ptr(ptr); \
- switch (sizeof (*(ptr))) { \
- case 1: \
- case 2: \
- case 4: \
- case 8: \
- __put_user_asm(__x, ptr, __pu_err); \
- break; \
- default: \
- __put_user_bad(); \
- break; \
- } \
- __pu_err; \
-})
-
-#define put_user(x, ptr) \
-({ \
- might_sleep(); \
- __put_user(x, ptr); \
-})
-
-
-extern int __put_user_bad(void) __attribute__((noreturn));
-
-#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
-#define __get_user_asm(x, ptr, err) \
-({ \
- err = 0; \
- asm volatile ( \
- "0: mvcp %O1(%2,%R1),0(%3),%0\n" \
- "1:\n" \
- __uaccess_fixup \
- : "+&d" (err), "=Q" (x) \
- : "d" (sizeof(*(ptr))), "a" (ptr), \
- "K" (-EFAULT) \
- : __uaccess_clobber ); \
-})
-#else
-#define __get_user_asm(x, ptr, err) \
-({ \
- err = 0; \
- asm volatile ( \
- "0: mvcp 0(%2,%5),0(%3),%0\n" \
- "1:\n" \
- __uaccess_fixup \
- : "+&d" (err), "=m" (x) \
- : "d" (sizeof(*(ptr))), "a" (ptr), \
- "K" (-EFAULT), "a" (&(x)) \
- : __uaccess_clobber ); \
-})
-#endif
-
-#define __get_user(x, ptr) \
-({ \
- int __gu_err; \
- __chk_user_ptr(ptr); \
- switch (sizeof(*(ptr))) { \
- case 1: { \
- unsigned char __x; \
- __get_user_asm(__x, ptr, __gu_err); \
- (x) = *(__typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 2: { \
- unsigned short __x; \
- __get_user_asm(__x, ptr, __gu_err); \
- (x) = *(__typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 4: { \
- unsigned int __x; \
- __get_user_asm(__x, ptr, __gu_err); \
- (x) = *(__typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- case 8: { \
- unsigned long long __x; \
- __get_user_asm(__x, ptr, __gu_err); \
- (x) = *(__typeof__(*(ptr)) *) &__x; \
- break; \
- }; \
- default: \
- __get_user_bad(); \
- break; \
- } \
- __gu_err; \
-})
-
-#define get_user(x, ptr) \
-({ \
- might_sleep(); \
- __get_user(x, ptr); \
-})
-
-extern int __get_user_bad(void) __attribute__((noreturn));
-
-#define __put_user_unaligned __put_user
-#define __get_user_unaligned __get_user
-
-extern long __copy_to_user_asm(const void *from, long n, void __user *to);
-
-/**
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep.
- *
- * Copy data from kernel space to user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-static inline unsigned long
-__copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- return __copy_to_user_asm(from, n, to);
-}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
-/**
- * copy_to_user: - Copy a block of data into user space.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-static inline unsigned long
-copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- might_sleep();
- if (access_ok(VERIFY_WRITE, to, n))
- n = __copy_to_user(to, from, n);
- return n;
-}
-
-extern long __copy_from_user_asm(void *to, long n, const void __user *from);
-
-/**
- * __copy_from_user: - Copy a block of data from user space, with less checking.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep.
- *
- * Copy data from user space to kernel space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-static inline unsigned long
-__copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- return __copy_from_user_asm(to, n, from);
-}
-
-/**
- * copy_from_user: - Copy a block of data from user space.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep.
- *
- * Copy data from user space to kernel space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-static inline unsigned long
-copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- might_sleep();
- if (access_ok(VERIFY_READ, from, n))
- n = __copy_from_user(to, from, n);
- else
- memset(to, 0, n);
- return n;
-}
-
-extern unsigned long __copy_in_user_asm(const void __user *from, long n,
- void __user *to);
-
-static inline unsigned long
-__copy_in_user(void __user *to, const void __user *from, unsigned long n)
-{
- return __copy_in_user_asm(from, n, to);
-}
-
-static inline unsigned long
-copy_in_user(void __user *to, const void __user *from, unsigned long n)
-{
- might_sleep();
- if (__access_ok(from,n) && __access_ok(to,n))
- n = __copy_in_user_asm(from, n, to);
- return n;
-}
-
-/*
- * Copy a null terminated string from userspace.
- */
-extern long __strncpy_from_user_asm(long count, char *dst,
- const char __user *src);
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- might_sleep();
- if (access_ok(VERIFY_READ, src, 1))
- res = __strncpy_from_user_asm(count, dst, src);
- return res;
-}
-
-
-extern long __strnlen_user_asm(long count, const char __user *src);
-
-static inline unsigned long
-strnlen_user(const char __user * src, unsigned long n)
-{
- might_sleep();
- return __strnlen_user_asm(n, src);
-}
-
-/**
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-#define strlen_user(str) strnlen_user(str, ~0UL)
-
-/*
- * Zero Userspace
- */
-
-extern long __clear_user_asm(void __user *to, long n);
-
-static inline unsigned long
-__clear_user(void __user *to, unsigned long n)
-{
- return __clear_user_asm(to, n);
-}
-
-static inline unsigned long
-clear_user(void __user *to, unsigned long n)
-{
- might_sleep();
- if (access_ok(VERIFY_WRITE, to, n))
- n = __clear_user_asm(to, n);
- return n;
-}
-
-#endif /* __S390_UACCESS_H */
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