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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/sh/include/asm/uaccess.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef __ASM_SH_UACCESS_H #define __ASM_SH_UACCESS_H #include <asm/segment.h> #include <asm/extable.h> #define __addr_ok(addr) \ ((unsigned long __force)(addr) < current_thread_info()->addr_limit.seg) / * __access_ok: Check if address with size is OK or not. * * Uhhuh, this needs 33-bit arithmetic. We have a carry.. * * sum := addr + size; carry? --> flag = true; * if (sum >= addr_limit) flag = true; / #define __access_ok(addr, size) ({ \ unsigned long __ao_a = (addr), __ao_b = (size); \ unsigned long __ao_end = __ao_a + __ao_b - !!__ao_b; \ __ao_end >= __ao_a && __addr_ok(__ao_end); }) #define access_ok(addr, size) \ (__chk_user_ptr(addr), \ __access_ok((unsigned long __force)(addr), (size))) #define user_addr_max() (current_thread_info()->addr_limit.seg) / * Uh, these should become the main single-value transfer routines ... * They automatically use the right size if we just have the right * pointer type ... * * As SuperH uses the same address space for kernel and user data, we * can just do these as direct assignments. * * Careful to not * (a) re-use the arguments for side effects (sizeof is ok) * (b) require any knowledge of processes at this stage / #define put_user(x,ptr) __put_user_check((x), (ptr), sizeof((ptr))) #define get_user(x,ptr) __get_user_check((x), (ptr), sizeof((ptr))) / * The "__xxx" versions do not do address space checking, useful when * doing multiple accesses to the same area (the user has to do the * checks by hand with "access_ok()") / #define __put_user(x,ptr) __put_user_nocheck((x), (ptr), sizeof((ptr))) #define __get_user(x,ptr) __get_user_nocheck((x), (ptr), sizeof((ptr))) struct __large_struct { unsigned long buf[100]; }; #define __m(x) ((struct __large_struct __user )(x)) #define __get_user_nocheck(x,ptr,size) \ ({ \ long __gu_err; \ unsigned long __gu_val; \ const __typeof__((ptr)) __user __gu_addr = (ptr); \ __chk_user_ptr(ptr); \ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ (x) = (__force __typeof__((ptr)))__gu_val; \ __gu_err; \ }) #define __get_user_check(x,ptr,size) \ ({ \ long __gu_err = -EFAULT; \ unsigned long __gu_val = 0; \ const __typeof__((ptr)) __gu_addr = (ptr); \ if (likely(access_ok(__gu_addr, (size)))) \ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ (x) = (__force __typeof__((ptr)))__gu_val; \ __gu_err; \ }) #define __put_user_nocheck(x,ptr,size) \ ({ \ long __pu_err; \ __typeof__((ptr)) __user __pu_addr = (ptr); \ __typeof__((ptr)) __pu_val = x; \ __chk_user_ptr(ptr); \ __put_user_size(__pu_val, __pu_addr, (size), __pu_err); \ __pu_err; \ }) #define __put_user_check(x,ptr,size) \ ({ \ long __pu_err = -EFAULT; \ __typeof__((ptr)) __user __pu_addr = (ptr); \ __typeof__((ptr)) __pu_val = x; \ if (likely(access_ok(__pu_addr, size))) \ __put_user_size(__pu_val, __pu_addr, (size), \ __pu_err); \ __pu_err; \ }) #ifdef CONFIG_SUPERH32 # include <asm/uaccess_32.h> #else # include <asm/uaccess_64.h> #endif extern long strncpy_from_user(char dest, const char __user src, long count); extern __must_check long strnlen_user(const char __user str, long n); /* Generic arbitrary sized copy. / / Return the number of bytes NOT copied / __kernel_size_t __copy_user(void to, const void from, __kernel_size_t n); static __always_inline unsigned long raw_copy_from_user(void to, const void __user from, unsigned long n) { return __copy_user(to, (__force void )from, n); } static __always_inline unsigned long __must_check raw_copy_to_user(void __user to, const void from, unsigned long n) { return __copy_user((__force void )to, from, n); } #define INLINE_COPY_FROM_USER #define INLINE_COPY_TO_USER / * Clear the area and return remaining number of bytes * (on failure. Usually it's 0.) / __kernel_size_t __clear_user(void addr, __kernel_size_t size); #define clear_user(addr,n) \ ({ \ void __user * __cl_addr = (addr); \ unsigned long __cl_size = (n); \ \ if (__cl_size && access_ok(__cl_addr, __cl_size)) \ __cl_size = __clear_user(__cl_addr, __cl_size); \ \ __cl_size; \ }) extern void set_exception_table_vec(unsigned int vec, void handler); static inline void set_exception_table_evt(unsigned int evt, void handler) { return set_exception_table_vec(evt >> 5, handler); } struct mem_access { unsigned long (from)(void dst, const void __user src, unsigned long cnt); unsigned long (to)(void __user dst, const void src, unsigned long cnt); }; int handle_unaligned_access(insn_size_t instruction, struct pt_regs regs, struct mem_access ma, int, unsigned long address); #endif /* __ASM_SH_UACCESS_H */

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