From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/um/include/asm/uaccess.h | 62 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 arch/um/include/asm/uaccess.h (limited to 'arch/um/include/asm/uaccess.h') diff --git a/arch/um/include/asm/uaccess.h b/arch/um/include/asm/uaccess.h new file mode 100644 index 000000000..7d9d60e41 --- /dev/null +++ b/arch/um/include/asm/uaccess.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2015 Richard Weinberger (richard@nod.at) + */ + +#ifndef __UM_UACCESS_H +#define __UM_UACCESS_H + +#include +#include + +#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 unsigned long __clear_user(void __user *mem, unsigned long len); +static inline int __access_ok(const void __user *ptr, 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 INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER + +#include + +static inline int __access_ok(const void __user *ptr, unsigned long size) +{ + unsigned long addr = (unsigned long)ptr; + return __addr_range_nowrap(addr, size) && + (__under_task_size(addr, size) || + __access_ok_vsyscall(addr, size)); +} + +/* no pagefaults for kernel addresses in um */ +#define __get_kernel_nofault(dst, src, type, err_label) \ +do { \ + *((type *)dst) = get_unaligned((type *)(src)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define __put_kernel_nofault(dst, src, type, err_label) \ +do { \ + put_unaligned(*((type *)src), (type *)(dst)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#endif -- cgit v1.2.3