Fixed MTP to work with TWRP

arch/m68k/include/asm/uaccess_no.h

@@ -0,0 +1,181 @@
+#ifndef __M68KNOMMU_UACCESS_H
+#define __M68KNOMMU_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+
+#include <asm/segment.h>
+
+#define VERIFY_READ	0
+#define VERIFY_WRITE	1
+
+#define access_ok(type,addr,size)	_access_ok((unsigned long)(addr),(size))
+
+/*
+ * It is not enough to just have access_ok check for a real RAM address.
+ * This would disallow the case of code/ro-data running XIP in flash/rom.
+ * Ideally we would check the possible flash ranges too, but that is
+ * currently not so easy.
+ */
+static inline int _access_ok(unsigned long addr, unsigned long size)
+{
+	return 1;
+}
+
+/*
+ * 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;
+};
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+
+/*
+ * These are the main single-value transfer routines.  They automatically
+ * use the right size if we just have the right pointer type.
+ */
+
+#define put_user(x, ptr)				\
+({							\
+    int __pu_err = 0;					\
+    typeof(*(ptr)) __pu_val = (x);			\
+    switch (sizeof (*(ptr))) {				\
+    case 1:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, b);	\
+	break;						\
+    case 2:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, w);	\
+	break;						\
+    case 4:						\
+	__put_user_asm(__pu_err, __pu_val, ptr, l);	\
+	break;						\
+    case 8:						\
+	memcpy(ptr, &__pu_val, sizeof (*(ptr))); \
+	break;						\
+    default:						\
+	__pu_err = __put_user_bad();			\
+	break;						\
+    }							\
+    __pu_err;						\
+})
+#define __put_user(x, ptr) put_user(x, ptr)
+
+extern int __put_user_bad(void);
+
+/*
+ * Tell gcc we read from memory instead of writing: this is because
+ * we do not write to any memory gcc knows about, so there are no
+ * aliasing issues.
+ */
+
+#define __ptr(x) ((unsigned long *)(x))
+
+#define __put_user_asm(err,x,ptr,bwl)				\
+	__asm__ ("move" #bwl " %0,%1"				\
+		: /* no outputs */						\
+		:"d" (x),"m" (*__ptr(ptr)) : "memory")
+
+#define get_user(x, ptr)					\
+({								\
+    int __gu_err = 0;						\
+    typeof(x) __gu_val = 0;					\
+    switch (sizeof(*(ptr))) {					\
+    case 1:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, b, "=d");	\
+	break;							\
+    case 2:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, w, "=r");	\
+	break;							\
+    case 4:							\
+	__get_user_asm(__gu_err, __gu_val, ptr, l, "=r");	\
+	break;							\
+    case 8:							\
+	memcpy((void *) &__gu_val, ptr, sizeof (*(ptr)));	\
+	break;							\
+    default:							\
+	__gu_val = 0;						\
+	__gu_err = __get_user_bad();				\
+	break;							\
+    }								\
+    (x) = (typeof(*(ptr))) __gu_val;				\
+    __gu_err;							\
+})
+#define __get_user(x, ptr) get_user(x, ptr)
+
+extern int __get_user_bad(void);
+
+#define __get_user_asm(err,x,ptr,bwl,reg)			\
+	__asm__ ("move" #bwl " %1,%0"				\
+		 : "=d" (x)					\
+		 : "m" (*__ptr(ptr)))
+
+#define copy_from_user(to, from, n)		(memcpy(to, from, n), 0)
+#define copy_to_user(to, from, n)		(memcpy(to, from, n), 0)
+
+#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
+#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n)) return retval; })
+
+#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n)) return retval; })
+
+/*
+ * Copy a null terminated string from userspace.
+ */
+
+static inline long
+strncpy_from_user(char *dst, const char *src, long count)
+{
+	char *tmp;
+	strncpy(dst, src, count);
+	for (tmp = dst; *tmp && count > 0; tmp++, count--)
+		;
+	return(tmp - dst); /* DAVIDM should we count a NUL ?  check getname */
+}
+
+/*
+ * Return the size of a string (including the ending 0)
+ *
+ * Return 0 on exception, a value greater than N if too long
+ */
+static inline long strnlen_user(const char *src, long n)
+{
+	return(strlen(src) + 1); /* DAVIDM make safer */
+}
+
+#define strlen_user(str) strnlen_user(str, 32767)
+
+/*
+ * Zero Userspace
+ */
+
+static inline unsigned long
+__clear_user(void *to, unsigned long n)
+{
+	memset(to, 0, n);
+	return 0;
+}
+
+#define	clear_user(to,n)	__clear_user(to,n)
+
+#endif /* _M68KNOMMU_UACCESS_H */