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/* 
 * 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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Name Type Size Permission Actions
Kbuild File 702 B 0644
a.out-core.h File 695 B 0644
bugs.h File 111 B 0644
cache.h File 483 B 0644
common.lds.S File 1.76 KB 0644
dma.h File 180 B 0644
fixmap.h File 1.63 KB 0644
hardirq.h File 558 B 0644
io.h File 339 B 0644
irq.h File 493 B 0644
irqflags.h File 865 B 0644
kmap_types.h File 219 B 0644
kvm_para.h File 34 B 0644
mmu.h File 558 B 0644
mmu_context.h File 1.87 KB 0644
page.h File 3.15 KB 0644
pgalloc.h File 1.46 KB 0644
pgtable-2level.h File 1.32 KB 0644
pgtable-3level.h File 2.88 KB 0644
pgtable.h File 9.88 KB 0644
processor-generic.h File 1.87 KB 0644
ptrace-generic.h File 1.13 KB 0644
sections.h File 219 B 0644
setup.h File 273 B 0644
smp.h File 121 B 0644
stacktrace.h File 1.06 KB 0644
syscall-generic.h File 2.67 KB 0644
sysrq.h File 182 B 0644
thread_info.h File 2.15 KB 0644
timex.h File 151 B 0644
tlb.h File 4.23 KB 0644
tlbflush.h File 978 B 0644
uaccess.h File 1.65 KB 0644
unwind.h File 213 B 0644