/* * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) * Copyright (C) 2015 Richard Weinberger (richard@nod.at) * Licensed under the GPL */ #ifndef __UM_UACCESS_H #define __UM_UACCESS_H #include <asm/elf.h> #define __under_task_size(addr, size) \ (((unsigned long) (addr) < TASK_SIZE) && \ (((unsigned long) (addr) + (size)) < TASK_SIZE)) #define __access_ok_vsyscall(addr, size) \ (((unsigned long) (addr) >= FIXADDR_USER_START) && \ ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \ ((unsigned long) (addr) + (size) >= (unsigned long)(addr))) #define __addr_range_nowrap(addr, size) \ ((unsigned long) (addr) <= ((unsigned long) (addr) + (size))) extern unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n); extern unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n); extern long __strncpy_from_user(char *dst, const char __user *src, long count); extern long __strnlen_user(const void __user *str, long len); extern unsigned long __clear_user(void __user *mem, unsigned long len); static inline int __access_ok(unsigned long addr, unsigned long size); /* Teach asm-generic/uaccess.h that we have C functions for these. */ #define __access_ok __access_ok #define __clear_user __clear_user #define __strnlen_user __strnlen_user #define __strncpy_from_user __strncpy_from_user #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER #include <asm-generic/uaccess.h> static inline int __access_ok(unsigned long addr, unsigned long size) { return __addr_range_nowrap(addr, size) && (__under_task_size(addr, size) || __access_ok_vsyscall(addr, size) || uaccess_kernel()); } #endif
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bugs.h | File | 111 B | 0644 |
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irqflags.h | File | 865 B | 0644 |
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kmap_types.h | File | 219 B | 0644 |
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kvm_para.h | File | 34 B | 0644 |
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page.h | File | 3.15 KB | 0644 |
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pgalloc.h | File | 1.46 KB | 0644 |
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pgtable-2level.h | File | 1.32 KB | 0644 |
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setup.h | File | 273 B | 0644 |
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smp.h | File | 121 B | 0644 |
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stacktrace.h | File | 1.06 KB | 0644 |
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syscall-generic.h | File | 2.67 KB | 0644 |
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sysrq.h | File | 182 B | 0644 |
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thread_info.h | File | 2.15 KB | 0644 |
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timex.h | File | 151 B | 0644 |
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tlb.h | File | 4.23 KB | 0644 |
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tlbflush.h | File | 978 B | 0644 |
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uaccess.h | File | 1.65 KB | 0644 |
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unwind.h | File | 213 B | 0644 |
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