#include <linux/sched.h>
#include <linux/errno.h>
#include <asm/processor.h>
+#include <asm/page.h>
#define VERIFY_READ 0
#define VERIFY_WRITE 1
#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
+#define KERNEL_DS MAKE_MM_SEG(~0UL)
#ifdef __powerpc64__
-#define KERNEL_DS MAKE_MM_SEG(0UL)
-#define USER_DS MAKE_MM_SEG(0xf000000000000000UL)
+/* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */
+#define USER_DS MAKE_MM_SEG(TASK_SIZE_USER64 - 1)
#else
-#define KERNEL_DS MAKE_MM_SEG(~0UL)
#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
#endif
#ifdef __powerpc64__
/*
- * Use the alpha trick for checking ranges:
- *
- * Is a address valid? This does a straightforward calculation rather
- * than tests.
- *
- * Address valid if:
- * - "addr" doesn't have any high-bits set
- * - AND "size" doesn't have any high-bits set
- * - OR we are in kernel mode.
- *
- * We dont have to check for high bits in (addr+size) because the first
- * two checks force the maximum result to be below the start of the
- * kernel region.
+ * This check is sufficient because there is a large enough
+ * gap between user addresses and the kernel addresses
*/
#define __access_ok(addr, size, segment) \
- (((segment).seg & (addr | size )) == 0)
+ (((addr) <= (segment).seg) && ((size) <= (segment).seg))
#else
__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
#define __put_user(x, ptr) \
__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
+
#ifndef __powerpc64__
#define __get_user64(x, ptr) \
__get_user64_nocheck((x), (ptr), sizeof(*(ptr)))
#define __put_user64(x, ptr) __put_user(x, ptr)
#endif
-#ifdef __powerpc64__
+#define __get_user_inatomic(x, ptr) \
+ __get_user_nosleep((x), (ptr), sizeof(*(ptr)))
+#define __put_user_inatomic(x, ptr) \
+ __put_user_nosleep((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
+
#define __get_user_unaligned __get_user
#define __put_user_unaligned __put_user
-#endif
extern long __put_user_bad(void);
-#ifdef __powerpc64__
-#define __EX_TABLE_ALIGN "3"
-#define __EX_TABLE_TYPE "llong"
-#else
-#define __EX_TABLE_ALIGN "2"
-#define __EX_TABLE_TYPE "long"
-#endif
-
/*
* We don't tell gcc that we are accessing memory, but this is OK
* because we do not write to any memory gcc knows about, so there
" b 2b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ."__EX_TABLE_TYPE" 1b,3b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,3b\n" \
".previous" \
: "=r" (err) \
- : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
+ : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\
+ "i"(sizeof(unsigned long)))
-#ifndef __powerpc64__
+#ifdef __powerpc64__
+#define __put_user_asm2(x, ptr, retval) \
+ __put_user_asm(x, ptr, retval, "std")
+#else /* __powerpc64__ */
#define __put_user_asm2(x, addr, err) \
__asm__ __volatile__( \
"1: stw %1,0(%2)\n" \
" b 3b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,4b\n" \
- " ." __EX_TABLE_TYPE " 2b,4b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,4b\n" \
+ PPC_LONG "2b,4b\n" \
".previous" \
: "=r" (err) \
- : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err))
-#else /* __powerpc64__ */
-#define __put_user_asm2(x, ptr, retval) \
- __put_user_asm(x, ptr, retval, "std")
+ : "r" (x), "b" (addr), "i" (-EFAULT), "0" (err),\
+ "i"(sizeof(unsigned long)))
#endif /* __powerpc64__ */
#define __put_user_size(x, ptr, size, retval) \
#define __put_user_nocheck(x, ptr, size) \
({ \
long __pu_err; \
- might_sleep(); \
+ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
+ if (!is_kernel_addr((unsigned long)__pu_addr)) \
+ might_sleep(); \
__chk_user_ptr(ptr); \
- __put_user_size((x), (ptr), (size), __pu_err); \
+ __put_user_size((x), __pu_addr, (size), __pu_err); \
__pu_err; \
})
__pu_err; \
})
+#define __put_user_nosleep(x, ptr, size) \
+({ \
+ long __pu_err; \
+ __typeof__(*(ptr)) __user *__pu_addr = (ptr); \
+ __chk_user_ptr(ptr); \
+ __put_user_size((x), __pu_addr, (size), __pu_err); \
+ __pu_err; \
+})
+
+
extern long __get_user_bad(void);
#define __get_user_asm(x, addr, err, op) \
__asm__ __volatile__( \
- "1: "op" %1,0(%2) # get_user\n" \
+ "1: "op" %1,0(%2) # get_user\n" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3: li %0,%3\n" \
" b 2b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align "__EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,3b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,3b\n" \
".previous" \
: "=r" (err), "=r" (x) \
- : "b" (addr), "i" (-EFAULT), "0" (err))
+ : "b" (addr), "i" (-EFAULT), "0" (err), \
+ "i"(sizeof(unsigned long)))
-#ifndef __powerpc64__
-#define __get_user_asm2(x, addr, err) \
+#ifdef __powerpc64__
+#define __get_user_asm2(x, addr, err) \
+ __get_user_asm(x, addr, err, "ld")
+#else /* __powerpc64__ */
+#define __get_user_asm2(x, addr, err) \
__asm__ __volatile__( \
"1: lwz %1,0(%2)\n" \
"2: lwz %1+1,4(%2)\n" \
" b 3b\n" \
".previous\n" \
".section __ex_table,\"a\"\n" \
- " .align " __EX_TABLE_ALIGN "\n" \
- " ." __EX_TABLE_TYPE " 1b,4b\n" \
- " ." __EX_TABLE_TYPE " 2b,4b\n" \
+ " .balign %5\n" \
+ PPC_LONG "1b,4b\n" \
+ PPC_LONG "2b,4b\n" \
".previous" \
: "=r" (err), "=&r" (x) \
- : "b" (addr), "i" (-EFAULT), "0" (err))
-#else
-#define __get_user_asm2(x, addr, err) \
- __get_user_asm(x, addr, err, "ld")
+ : "b" (addr), "i" (-EFAULT), "0" (err), \
+ "i"(sizeof(unsigned long)))
#endif /* __powerpc64__ */
#define __get_user_size(x, ptr, size, retval) \
do { \
retval = 0; \
__chk_user_ptr(ptr); \
- if (size > sizeof(x)) \
- (x) = __get_user_bad(); \
+ if (size > sizeof(x)) \
+ (x) = __get_user_bad(); \
switch (size) { \
case 1: __get_user_asm(x, ptr, retval, "lbz"); break; \
case 2: __get_user_asm(x, ptr, retval, "lhz"); break; \
({ \
long __gu_err; \
unsigned long __gu_val; \
+ const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
__chk_user_ptr(ptr); \
- might_sleep(); \
- __get_user_size(__gu_val, (ptr), (size), __gu_err); \
+ if (!is_kernel_addr((unsigned long)__gu_addr)) \
+ might_sleep(); \
+ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
({ \
long __gu_err; \
long long __gu_val; \
+ const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
__chk_user_ptr(ptr); \
- might_sleep(); \
- __get_user_size(__gu_val, (ptr), (size), __gu_err); \
+ if (!is_kernel_addr((unsigned long)__gu_addr)) \
+ might_sleep(); \
+ __get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
long __gu_err = -EFAULT; \
unsigned long __gu_val = 0; \
const __typeof__(*(ptr)) __user *__gu_addr = (ptr); \
- might_sleep(); \
+ might_sleep(); \
if (access_ok(VERIFY_READ, __gu_addr, (size))) \
__get_user_size(__gu_val, __gu_addr, (size), __gu_err); \
(x) = (__typeof__(*(ptr)))__gu_val; \
__gu_err; \
})
+#define __get_user_nosleep(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) = (__typeof__(*(ptr)))__gu_val; \
+ __gu_err; \
+})
+
+
/* more complex routines */
extern unsigned long __copy_tofrom_user(void __user *to,
const void __user *from, unsigned long size);
#ifndef __powerpc64__
-extern inline unsigned long
-copy_from_user(void *to, const void __user *from, unsigned long n)
+
+static inline unsigned long copy_from_user(void *to,
+ const void __user *from, unsigned long n)
{
unsigned long over;
return n;
}
-extern inline unsigned long
-copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long copy_to_user(void __user *to,
+ const void *from, unsigned long n)
{
unsigned long over;
#else /* __powerpc64__ */
-static inline unsigned long
-__copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
+#define __copy_in_user(to, from, size) \
+ __copy_tofrom_user((to), (from), (size))
+
+extern unsigned long copy_from_user(void *to, const void __user *from,
+ unsigned long n);
+extern unsigned long copy_to_user(void __user *to, const void *from,
+ unsigned long n);
+extern unsigned long copy_in_user(void __user *to, const void __user *from,
+ unsigned long n);
+
+#endif /* __powerpc64__ */
+
+static inline unsigned long __copy_from_user_inatomic(void *to,
+ const void __user *from, unsigned long n)
{
if (__builtin_constant_p(n) && (n <= 8)) {
unsigned long ret;
__get_user_size(*(u64 *)to, from, 8, ret);
break;
}
- return (ret == -EFAULT) ? n : 0;
+ if (ret == 0)
+ return 0;
}
- return __copy_tofrom_user((__force void __user *) to, from, n);
+ return __copy_tofrom_user((__force void __user *)to, from, n);
}
-static inline unsigned long
-__copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
+static inline unsigned long __copy_to_user_inatomic(void __user *to,
+ const void *from, unsigned long n)
{
if (__builtin_constant_p(n) && (n <= 8)) {
unsigned long ret;
__put_user_size(*(u64 *)from, (u64 __user *)to, 8, ret);
break;
}
- return (ret == -EFAULT) ? n : 0;
+ if (ret == 0)
+ return 0;
}
- return __copy_tofrom_user(to, (__force const void __user *) from, n);
+ return __copy_tofrom_user(to, (__force const void __user *)from, n);
}
-#endif /* __powerpc64__ */
-
-static inline unsigned long
-__copy_from_user(void *to, const void __user *from, unsigned long size)
+static inline unsigned long __copy_from_user(void *to,
+ const void __user *from, unsigned long size)
{
might_sleep();
-#ifndef __powerpc64__
- return __copy_tofrom_user((__force void __user *)to, from, size);
-#else /* __powerpc64__ */
return __copy_from_user_inatomic(to, from, size);
-#endif /* __powerpc64__ */
}
-static inline unsigned long
-__copy_to_user(void __user *to, const void *from, unsigned long size)
+static inline unsigned long __copy_to_user(void __user *to,
+ const void *from, unsigned long size)
{
might_sleep();
-#ifndef __powerpc64__
- return __copy_tofrom_user(to, (__force void __user *)from, size);
-#else /* __powerpc64__ */
return __copy_to_user_inatomic(to, from, size);
-#endif /* __powerpc64__ */
}
-#ifndef __powerpc64__
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-#else /* __powerpc64__ */
-#define __copy_in_user(to, from, size) \
- __copy_tofrom_user((to), (from), (size))
-
-extern unsigned long copy_from_user(void *to, const void __user *from,
- unsigned long n);
-extern unsigned long copy_to_user(void __user *to, const void *from,
- unsigned long n);
-extern unsigned long copy_in_user(void __user *to, const void __user *from,
- unsigned long n);
-#endif /* __powerpc64__ */
-
extern unsigned long __clear_user(void __user *addr, unsigned long size);
static inline unsigned long clear_user(void __user *addr, unsigned long size)
might_sleep();
if (likely(access_ok(VERIFY_WRITE, addr, size)))
return __clear_user(addr, size);
-#ifndef __powerpc64__
if ((unsigned long)addr < TASK_SIZE) {
unsigned long over = (unsigned long)addr + size - TASK_SIZE;
return __clear_user(addr, size - over) + over;
}
-#endif /* __powerpc64__ */
return size;
}
*
* Return 0 for error
*/
-#ifndef __powerpc64__
extern int __strnlen_user(const char __user *str, long len, unsigned long top);
-#else /* __powerpc64__ */
-extern int __strnlen_user(const char __user *str, long len);
-#endif /* __powerpc64__ */
/*
* Returns the length of the string at str (including the null byte),
*/
static inline int strnlen_user(const char __user *str, long len)
{
-#ifndef __powerpc64__
unsigned long top = current->thread.fs.seg;
if ((unsigned long)str > top)
return 0;
return __strnlen_user(str, len, top);
-#else /* __powerpc64__ */
- might_sleep();
- if (likely(access_ok(VERIFY_READ, str, 1)))
- return __strnlen_user(str, len);
- return 0;
-#endif /* __powerpc64__ */
}
#define strlen_user(str) strnlen_user((str), 0x7ffffffe)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff