diff options
Diffstat (limited to 'arch/sh/include/asm/uaccess.h')
| -rw-r--r-- | arch/sh/include/asm/uaccess.h | 106 |
1 files changed, 14 insertions, 92 deletions
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h index 9486376605f4..a79609eb14be 100644 --- a/arch/sh/include/asm/uaccess.h +++ b/arch/sh/include/asm/uaccess.h @@ -1,31 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ASM_SH_UACCESS_H #define __ASM_SH_UACCESS_H -#include <linux/errno.h> -#include <linux/sched.h> -#include <asm/segment.h> - -#define VERIFY_READ 0 -#define VERIFY_WRITE 1 - -#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) \ - (__addr_ok((addr) + (size))) -#define access_ok(type, addr, size) \ - (__chk_user_ptr(addr), \ - __access_ok((unsigned long __force)(addr), (size))) - -#define user_addr_max() (current_thread_info()->addr_limit.seg) +#include <asm/extable.h> +#include <asm-generic/access_ok.h> /* * Uh, these should become the main single-value transfer routines ... @@ -60,7 +38,7 @@ struct __large_struct { unsigned long buf[100]; }; const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ __chk_user_ptr(ptr); \ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ - (x) = (__typeof__(*(ptr)))__gu_val; \ + (x) = (__force __typeof__(*(ptr)))__gu_val; \ __gu_err; \ }) @@ -68,10 +46,10 @@ struct __large_struct { unsigned long buf[100]; }; ({ \ long __gu_err = -EFAULT; \ unsigned long __gu_val = 0; \ - const __typeof__(*(ptr)) *__gu_addr = (ptr); \ - if (likely(access_ok(VERIFY_READ, __gu_addr, (size)))) \ + const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \ + if (likely(access_ok(__gu_addr, (size)))) \ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \ - (x) = (__typeof__(*(ptr)))__gu_val; \ + (x) = (__force __typeof__(*(ptr)))__gu_val; \ __gu_err; \ }) @@ -90,21 +68,16 @@ struct __large_struct { unsigned long buf[100]; }; long __pu_err = -EFAULT; \ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \ __typeof__(*(ptr)) __pu_val = x; \ - if (likely(access_ok(VERIFY_WRITE, __pu_addr, size))) \ + 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 strlen_user(const char __user *str); extern __must_check long strnlen_user(const char __user *str, long n); /* Generic arbitrary sized copy. */ @@ -112,87 +85,36 @@ extern __must_check long strnlen_user(const char __user *str, long n); __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); static __always_inline unsigned long -__copy_from_user(void *to, const void __user *from, unsigned long n) +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 -__copy_to_user(void __user *to, const void *from, unsigned long n) +raw_copy_to_user(void __user *to, const void *from, unsigned long n) { return __copy_user((__force void *)to, from, n); } - -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user +#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); +__kernel_size_t __clear_user(void __user *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(VERIFY_WRITE, \ - ((unsigned long)(__cl_addr)), __cl_size)) \ + if (__cl_size && access_ok(__cl_addr, __cl_size)) \ __cl_size = __clear_user(__cl_addr, __cl_size); \ \ __cl_size; \ }) -static inline unsigned long -copy_from_user(void *to, const void __user *from, unsigned long n) -{ - unsigned long __copy_from = (unsigned long) from; - __kernel_size_t __copy_size = (__kernel_size_t) n; - - if (__copy_size && __access_ok(__copy_from, __copy_size)) - return __copy_user(to, from, __copy_size); - - return __copy_size; -} - -static inline unsigned long -copy_to_user(void __user *to, const void *from, unsigned long n) -{ - unsigned long __copy_to = (unsigned long) to; - __kernel_size_t __copy_size = (__kernel_size_t) n; - - if (__copy_size && __access_ok(__copy_to, __copy_size)) - return __copy_user(to, from, __copy_size); - - return __copy_size; -} - -/* - * The exception table consists of pairs of addresses: the first is the - * address of an instruction that is allowed to fault, and the second is - * the address at which the program should continue. No registers are - * modified, so it is entirely up to the continuation code to figure out - * what to do. - * - * All the routines below use bits of fixup code that are out of line - * with the main instruction path. This means when everything is well, - * we don't even have to jump over them. Further, they do not intrude - * on our cache or tlb entries. - */ -struct exception_table_entry { - unsigned long insn, fixup; -}; - -#if defined(CONFIG_SUPERH64) && defined(CONFIG_MMU) -#define ARCH_HAS_SEARCH_EXTABLE -#endif - -int fixup_exception(struct pt_regs *regs); -/* Returns 0 if exception not found and fixup.unit otherwise. */ -unsigned long search_exception_table(unsigned long addr); -const struct exception_table_entry *search_exception_tables(unsigned long addr); - extern void *set_exception_table_vec(unsigned int vec, void *handler); static inline void *set_exception_table_evt(unsigned int evt, void *handler) |