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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
*/
#include <linux/uaccess.h>
#include <linux/kernel.h>
#include <os.h>
long probe_kernel_read(void *dst, const void *src, size_t size)
{
void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
if ((unsigned long)src < PAGE_SIZE || size <= 0)
return -EFAULT;
if (os_mincore(psrc, size + src - psrc) <= 0)
return -EFAULT;
return __probe_kernel_read(dst, src, size);
}
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