Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 299 insertions, 0 deletions

diff --git a/include/asm-arm26/uaccess.h b/include/asm-arm26/uaccess.h
new file mode 100644
index 000000000000..ab9ce38c6aec
--- /dev/null
+++ b/include/asm-arm26/uaccess.h
@@ -0,0 +1,299 @@
+#ifndef _ASMARM_UACCESS_H
+#define _ASMARM_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <asm/errno.h>
+
+#define VERIFY_READ 0
+#define VERIFY_WRITE 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);
+extern int fixup_exception(struct pt_regs *regs);
+
+#define get_ds()	(KERNEL_DS)
+#define get_fs()	(current_thread_info()->addr_limit)
+#define segment_eq(a,b)	((a) == (b))
+
+#include <asm/uaccess-asm.h>
+
+#define access_ok(type,addr,size)	(__range_ok(addr,size) == 0)
+
+/* this function will go away soon - use access_ok() instead */
+static inline int __deprecated verify_area(int type, const void * addr, unsigned long size)
+{
+	return access_ok(type, addr, size) ? 0 : -EFAULT;
+}
+
+/*
+ * Single-value transfer routines.  They automatically use the right
+ * size if we just have the right pointer type.  Note that the functions
+ * which read from user space (*get_*) need to take care not to leak
+ * kernel data even if the calling code is buggy and fails to check
+ * the return value.  This means zeroing out the destination variable
+ * or buffer on error.  Normally this is done out of line by the
+ * fixup code, but there are a few places where it intrudes on the
+ * main code path.  When we only write to user space, there is no
+ * problem.
+ *
+ * The "__xxx" versions of the user access functions do not verify the
+ * address space - it must have been done previously with a separate
+ * "access_ok()" call.
+ *
+ * The "xxx_error" versions set the third argument to EFAULT if an
+ * error occurs, and leave it unchanged on success.  Note that these
+ * versions are void (ie, don't return a value as such).
+ */
+
+extern int __get_user_1(void *);
+extern int __get_user_2(void *);
+extern int __get_user_4(void *);
+extern int __get_user_8(void *);
+extern int __get_user_bad(void);
+
+#define __get_user_x(__r1,__p,__e,__s,__i...)				\
+	   __asm__ __volatile__ ("bl	__get_user_" #__s		\
+		: "=&r" (__e), "=r" (__r1)				\
+		: "0" (__p)						\
+		: __i)
+
+#define get_user(x,p)							\
+	({								\
+		const register typeof(*(p)) *__p asm("r0") = (p);	\
+		register typeof(*(p)) __r1 asm("r1");			\
+		register int __e asm("r0");				\
+		switch (sizeof(*(p))) {					\
+		case 1:							\
+			__get_user_x(__r1, __p, __e, 1, "lr");		\
+	       		break;						\
+		case 2:							\
+			__get_user_x(__r1, __p, __e, 2, "r2", "lr");	\
+			break;						\
+		case 4:							\
+	       		__get_user_x(__r1, __p, __e, 4, "lr");		\
+			break;						\
+		case 8:							\
+			__get_user_x(__r1, __p, __e, 8, "lr");		\
+	       		break;						\
+		default: __e = __get_user_bad(); break;			\
+		}							\
+		x = __r1;						\
+		__e;							\
+	})
+
+
+#define __get_user(x,ptr)                                               \
+({                                                                      \
+        long __gu_err = 0;                                              \
+        __get_user_err((x),(ptr),__gu_err);                             \
+        __gu_err;                                                       \
+})
+
+#define __get_user_error(x,ptr,err)                                     \
+({                                                                      \
+        __get_user_err((x),(ptr),err);                                  \
+        (void) 0;                                                       \
+})
+
+#define __get_user_err(x,ptr,err)                                       \
+do {                                                                    \
+        unsigned long __gu_addr = (unsigned long)(ptr);                 \
+        unsigned long __gu_val;                                         \
+        switch (sizeof(*(ptr))) {                                       \
+        case 1: __get_user_asm_byte(__gu_val,__gu_addr,err);    break;  \
+        case 2: __get_user_asm_half(__gu_val,__gu_addr,err);    break;  \
+        case 4: __get_user_asm_word(__gu_val,__gu_addr,err);    break;  \
+        default: (__gu_val) = __get_user_bad();                         \
+        }                                                               \
+        (x) = (__typeof__(*(ptr)))__gu_val;                             \
+} while (0)
+
+extern int __put_user_1(void *, unsigned int);
+extern int __put_user_2(void *, unsigned int);
+extern int __put_user_4(void *, unsigned int);
+extern int __put_user_8(void *, unsigned long long);
+extern int __put_user_bad(void);
+
+#define __put_user_x(__r1,__p,__e,__s)                                  \
+           __asm__ __volatile__ (                                       \
+                __asmeq("%0", "r0") __asmeq("%2", "r1")                 \
+                "bl     __put_user_" #__s                               \
+                : "=&r" (__e)                                           \
+                : "0" (__p), "r" (__r1)                                 \
+                : "ip", "lr", "cc")
+
+#define put_user(x,p)                                                   \
+        ({                                                              \
+                const register typeof(*(p)) __r1 asm("r1") = (x);       \
+                const register typeof(*(p)) *__p asm("r0") = (p);       \
+                register int __e asm("r0");                             \
+                switch (sizeof(*(__p))) {                               \
+                case 1:                                                 \
+                        __put_user_x(__r1, __p, __e, 1);                \
+                        break;                                          \
+                case 2:                                                 \
+                        __put_user_x(__r1, __p, __e, 2);                \
+                        break;                                          \
+                case 4:                                                 \
+                        __put_user_x(__r1, __p, __e, 4);                \
+                        break;                                          \
+                case 8:                                                 \
+                        __put_user_x(__r1, __p, __e, 8);                \
+                        break;                                          \
+                default: __e = __put_user_bad(); break;                 \
+                }                                                       \
+                __e;                                                    \
+        })
+
+#if 0
+/*********************   OLD METHOD *******************/
+#define __put_user_x(__r1,__p,__e,__s,__i...)				\
+	   __asm__ __volatile__ ("bl	__put_user_" #__s		\
+		: "=&r" (__e)						\
+		: "0" (__p), "r" (__r1)					\
+		: __i)
+
+#define put_user(x,p)							\
+	({								\
+		const register typeof(*(p)) __r1 asm("r1") = (x);	\
+		const register typeof(*(p)) *__p asm("r0") = (p);	\
+		register int __e asm("r0");				\
+		switch (sizeof(*(p))) {					\
+		case 1:							\
+			__put_user_x(__r1, __p, __e, 1, "r2", "lr");	\
+			break;						\
+		case 2:							\
+			__put_user_x(__r1, __p, __e, 2, "r2", "lr");	\
+			break;						\
+		case 4:							\
+			__put_user_x(__r1, __p, __e, 4, "r2", "lr");	\
+			break;						\
+		case 8:							\
+			__put_user_x(__r1, __p, __e, 8, "r2", "ip", "lr");	\
+			break;						\
+		default: __e = __put_user_bad(); break;			\
+		}							\
+		__e;							\
+	})
+/*************************************************/
+#endif
+
+#define __put_user(x,ptr)                                               \
+({                                                                      \
+        long __pu_err = 0;                                              \
+        __put_user_err((x),(ptr),__pu_err);                             \
+        __pu_err;                                                       \
+})
+
+#define __put_user_error(x,ptr,err)                                     \
+({                                                                      \
+        __put_user_err((x),(ptr),err);                                  \
+        (void) 0;                                                       \
+})
+
+#define __put_user_err(x,ptr,err)                                       \
+do {                                                                    \
+        unsigned long __pu_addr = (unsigned long)(ptr);                 \
+        __typeof__(*(ptr)) __pu_val = (x);                              \
+        switch (sizeof(*(ptr))) {                                       \
+        case 1: __put_user_asm_byte(__pu_val,__pu_addr,err);    break;  \
+        case 2: __put_user_asm_half(__pu_val,__pu_addr,err);    break;  \
+        case 4: __put_user_asm_word(__pu_val,__pu_addr,err);    break;  \
+        case 8: __put_user_asm_dword(__pu_val,__pu_addr,err);   break;  \
+        default: __put_user_bad();                                      \
+        }                                                               \
+} while (0)
+
+static __inline__ unsigned long copy_from_user(void *to, const void *from, unsigned long n)
+{
+	if (access_ok(VERIFY_READ, from, n))
+		__do_copy_from_user(to, from, n);
+	else /* security hole - plug it */
+		memzero(to, n);
+	return n;
+}
+
+static __inline__ unsigned long __copy_from_user(void *to, const void *from, unsigned long n)
+{
+	__do_copy_from_user(to, from, n);
+	return n;
+}
+
+static __inline__ unsigned long copy_to_user(void *to, const void *from, unsigned long n)
+{
+	if (access_ok(VERIFY_WRITE, to, n))
+		__do_copy_to_user(to, from, n);
+	return n;
+}
+
+static __inline__ unsigned long __copy_to_user(void *to, const void *from, unsigned long n)
+{
+	__do_copy_to_user(to, from, n);
+	return n;
+}
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+static __inline__ unsigned long clear_user (void *to, unsigned long n)
+{
+	if (access_ok(VERIFY_WRITE, to, n))
+		__do_clear_user(to, n);
+	return n;
+}
+
+static __inline__ unsigned long __clear_user (void *to, unsigned long n)
+{
+	__do_clear_user(to, n);
+	return n;
+}
+
+static __inline__ long strncpy_from_user (char *dst, const char *src, long count)
+{
+	long res = -EFAULT;
+	if (access_ok(VERIFY_READ, src, 1))
+		__do_strncpy_from_user(dst, src, count, res);
+	return res;
+}
+
+static __inline__ long __strncpy_from_user (char *dst, const char *src, long count)
+{
+	long res;
+	__do_strncpy_from_user(dst, src, count, res);
+	return res;
+}
+
+#define strlen_user(s)	strnlen_user(s, ~0UL >> 1)
+
+static inline long strnlen_user(const char *s, long n)
+{
+	unsigned long res = 0;
+
+	if (__addr_ok(s))
+		__do_strnlen_user(s, n, res);
+
+	return res;
+}
+
+#endif /* _ASMARM_UACCESS_H */