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-rw-r--r--arch/sh/include/asm/uaccess.h133
1 files changed, 133 insertions, 0 deletions
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h
new file mode 100644
index 000000000..a79609eb1
--- /dev/null
+++ b/arch/sh/include/asm/uaccess.h
@@ -0,0 +1,133 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_SH_UACCESS_H
+#define __ASM_SH_UACCESS_H
+
+#include <asm/extable.h>
+#include <asm-generic/access_ok.h>
+
+/*
+ * 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)) __user *__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; \
+})
+
+# include <asm/uaccess_32.h>
+
+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 __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(__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 */