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49 lines
1.7 KiB
49 lines
1.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2002 Jeff Dike ([email protected]) |
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* Copyright (C) 2015 Richard Weinberger ([email protected]) |
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*/ |
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#ifndef __UM_UACCESS_H |
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#define __UM_UACCESS_H |
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#include <asm/elf.h> |
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#define __under_task_size(addr, size) \ |
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(((unsigned long) (addr) < TASK_SIZE) && \ |
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(((unsigned long) (addr) + (size)) < TASK_SIZE)) |
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#define __access_ok_vsyscall(addr, size) \ |
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(((unsigned long) (addr) >= FIXADDR_USER_START) && \ |
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((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ |
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((unsigned long) (addr) + (size) >= (unsigned long)(addr))) |
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#define __addr_range_nowrap(addr, size) \ |
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((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) |
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extern unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n); |
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extern unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n); |
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extern long __strncpy_from_user(char *dst, const char __user *src, long count); |
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extern long __strnlen_user(const void __user *str, long len); |
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extern unsigned long __clear_user(void __user *mem, unsigned long len); |
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static inline int __access_ok(unsigned long addr, unsigned long size); |
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/* Teach asm-generic/uaccess.h that we have C functions for these. */ |
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#define __access_ok __access_ok |
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#define __clear_user __clear_user |
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#define __strnlen_user __strnlen_user |
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#define __strncpy_from_user __strncpy_from_user |
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#define INLINE_COPY_FROM_USER |
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#define INLINE_COPY_TO_USER |
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#include <asm-generic/uaccess.h> |
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static inline int __access_ok(unsigned long addr, unsigned long size) |
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{ |
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return __addr_range_nowrap(addr, size) && |
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(__under_task_size(addr, size) || |
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__access_ok_vsyscall(addr, size) || |
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uaccess_kernel()); |
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} |
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#endif
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