summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/uaccess.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/include/asm/uaccess.h')
-rw-r--r--arch/mips/include/asm/uaccess.h442
1 files changed, 59 insertions, 383 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 70ca8eee166a..99e629a590a5 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -128,23 +128,14 @@ static inline bool eva_kernel_access(void)
* this function, memory access functions may still return -EFAULT.
*/
-#define __access_mask get_fs().seg
-
-#define __access_ok(addr, size, mask) \
-({ \
- unsigned long __addr = (unsigned long) (addr); \
- unsigned long __size = size; \
- unsigned long __mask = mask; \
- unsigned long __ok; \
- \
- __chk_user_ptr(addr); \
- __ok = (signed long)(__mask & (__addr | (__addr + __size) | \
- __ua_size(__size))); \
- __ok == 0; \
-})
+static inline int __access_ok(const void __user *p, unsigned long size)
+{
+ unsigned long addr = (unsigned long)p;
+ return (get_fs().seg & (addr | (addr + size) | __ua_size(size))) == 0;
+}
#define access_ok(type, addr, size) \
- likely(__access_ok((addr), (size), __access_mask))
+ likely(__access_ok((addr), (size)))
/*
* put_user: - Write a simple value into user space.
@@ -806,157 +797,7 @@ extern void __put_user_unaligned_unknown(void);
extern size_t __copy_user(void *__to, const void *__from, size_t __n);
-#ifndef CONFIG_EVA
-#define __invoke_copy_to_user(to, from, n) \
-({ \
- register void __user *__cu_to_r __asm__("$4"); \
- register const void *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- __MODULE_JAL(__copy_user) \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
-#define __invoke_copy_to_kernel(to, from, n) \
- __invoke_copy_to_user(to, from, n)
-
-#endif
-
-/*
- * __copy_to_user: - Copy a block of data into user space, with less checking.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define __copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- might_fault(); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
-
-#define __copy_to_user_inatomic(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_to_kernel(__cu_to, __cu_from, \
- __cu_len); \
- else \
- __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-#define __copy_from_user_inatomic(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) \
- __cu_len = __invoke_copy_from_kernel_inatomic(__cu_to, \
- __cu_from,\
- __cu_len);\
- else \
- __cu_len = __invoke_copy_from_user_inatomic(__cu_to, \
- __cu_from, \
- __cu_len); \
- __cu_len; \
-})
-
-/*
- * copy_to_user: - Copy a block of data into user space.
- * @to: Destination address, in user space.
- * @from: Source address, in kernel space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from kernel space to user space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- */
-#define copy_to_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_from, __cu_len, true); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_to_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- if (access_ok(VERIFY_WRITE, __cu_to, __cu_len)) { \
- might_fault(); \
- __cu_len = __invoke_copy_to_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } \
- } \
- __cu_len; \
-})
-
-#ifndef CONFIG_EVA
-
-#define __invoke_copy_from_user(to, from, n) \
+#define __invoke_copy_from(func, to, from, n) \
({ \
register void *__cu_to_r __asm__("$4"); \
register const void __user *__cu_from_r __asm__("$5"); \
@@ -967,7 +808,7 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r = (n); \
__asm__ __volatile__( \
".set\tnoreorder\n\t" \
- __MODULE_JAL(__copy_user) \
+ __MODULE_JAL(func) \
".set\tnoat\n\t" \
__UA_ADDU "\t$1, %1, %2\n\t" \
".set\tat\n\t" \
@@ -979,33 +820,17 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r; \
})
-#define __invoke_copy_from_kernel(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-/* For userland <-> userland operations */
-#define ___invoke_copy_in_user(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-/* For kernel <-> kernel operations */
-#define ___invoke_copy_in_kernel(to, from, n) \
- __invoke_copy_from_user(to, from, n)
-
-#define __invoke_copy_from_user_inatomic(to, from, n) \
+#define __invoke_copy_to(func, to, from, n) \
({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
+ register void __user *__cu_to_r __asm__("$4"); \
+ register const void *__cu_from_r __asm__("$5"); \
register long __cu_len_r __asm__("$6"); \
\
__cu_to_r = (to); \
__cu_from_r = (from); \
__cu_len_r = (n); \
__asm__ __volatile__( \
- ".set\tnoreorder\n\t" \
- __MODULE_JAL(__copy_user_inatomic) \
- ".set\tnoat\n\t" \
- __UA_ADDU "\t$1, %1, %2\n\t" \
- ".set\tat\n\t" \
- ".set\treorder" \
+ __MODULE_JAL(func) \
: "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
: \
: "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
@@ -1013,228 +838,79 @@ extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n);
__cu_len_r; \
})
-#define __invoke_copy_from_kernel_inatomic(to, from, n) \
- __invoke_copy_from_user_inatomic(to, from, n) \
+#define __invoke_copy_from_kernel(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#define __invoke_copy_to_kernel(to, from, n) \
+ __invoke_copy_to(__copy_user, to, from, n)
+
+#define ___invoke_copy_in_kernel(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#ifndef CONFIG_EVA
+#define __invoke_copy_from_user(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
+
+#define __invoke_copy_to_user(to, from, n) \
+ __invoke_copy_to(__copy_user, to, from, n)
+
+#define ___invoke_copy_in_user(to, from, n) \
+ __invoke_copy_from(__copy_user, to, from, n)
#else
/* EVA specific functions */
-extern size_t __copy_user_inatomic_eva(void *__to, const void *__from,
- size_t __n);
extern size_t __copy_from_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_to_user_eva(void *__to, const void *__from,
size_t __n);
extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
-#define __invoke_copy_from_user_eva_generic(to, from, n, func_ptr) \
-({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- ".set\tnoreorder\n\t" \
- __MODULE_JAL(func_ptr) \
- ".set\tnoat\n\t" \
- __UA_ADDU "\t$1, %1, %2\n\t" \
- ".set\tat\n\t" \
- ".set\treorder" \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
-#define __invoke_copy_to_user_eva_generic(to, from, n, func_ptr) \
-({ \
- register void *__cu_to_r __asm__("$4"); \
- register const void __user *__cu_from_r __asm__("$5"); \
- register long __cu_len_r __asm__("$6"); \
- \
- __cu_to_r = (to); \
- __cu_from_r = (from); \
- __cu_len_r = (n); \
- __asm__ __volatile__( \
- __MODULE_JAL(func_ptr) \
- : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \
- : \
- : "$8", "$9", "$10", "$11", "$12", "$14", "$15", "$24", "$31", \
- DADDI_SCRATCH, "memory"); \
- __cu_len_r; \
-})
-
/*
* Source or destination address is in userland. We need to go through
* the TLB
*/
#define __invoke_copy_from_user(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_from_user_eva)
-
-#define __invoke_copy_from_user_inatomic(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, \
- __copy_user_inatomic_eva)
+ __invoke_copy_from(__copy_from_user_eva, to, from, n)
#define __invoke_copy_to_user(to, from, n) \
- __invoke_copy_to_user_eva_generic(to, from, n, __copy_to_user_eva)
+ __invoke_copy_to(__copy_to_user_eva, to, from, n)
#define ___invoke_copy_in_user(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_in_user_eva)
-
-/*
- * Source or destination address in the kernel. We are not going through
- * the TLB
- */
-#define __invoke_copy_from_kernel(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user)
-
-#define __invoke_copy_from_kernel_inatomic(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user_inatomic)
-
-#define __invoke_copy_to_kernel(to, from, n) \
- __invoke_copy_to_user_eva_generic(to, from, n, __copy_user)
-
-#define ___invoke_copy_in_kernel(to, from, n) \
- __invoke_copy_from_user_eva_generic(to, from, n, __copy_user)
+ __invoke_copy_from(__copy_in_user_eva, to, from, n)
#endif /* CONFIG_EVA */
-/*
- * __copy_from_user: - Copy a block of data from user space, with less checking.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space. Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define __copy_from_user(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_from_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- might_fault(); \
- __cu_len = __invoke_copy_from_user(__cu_to, __cu_from, \
- __cu_len); \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return __invoke_copy_to_kernel(to, from, n);
+ else
+ return __invoke_copy_to_user(to, from, n);
+}
-/*
- * copy_from_user: - Copy a block of data from user space.
- * @to: Destination address, in kernel space.
- * @from: Source address, in user space.
- * @n: Number of bytes to copy.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Copy data from user space to kernel space.
- *
- * Returns number of bytes that could not be copied.
- * On success, this will be zero.
- *
- * If some data could not be copied, this function will pad the copied
- * data to the requested size using zero bytes.
- */
-#define copy_from_user(to, from, n) \
-({ \
- void *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- \
- check_object_size(__cu_to, __cu_len, false); \
- \
- if (eva_kernel_access()) { \
- __cu_len = __invoke_copy_from_kernel(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- if (access_ok(VERIFY_READ, __cu_from, __cu_len)) { \
- might_fault(); \
- __cu_len = __invoke_copy_from_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } else { \
- memset(__cu_to, 0, __cu_len); \
- } \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return __invoke_copy_from_kernel(to, from, n);
+ else
+ return __invoke_copy_from_user(to, from, n);
+}
-#define __copy_in_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- if (eva_kernel_access()) { \
- __cu_len = ___invoke_copy_in_kernel(__cu_to, __cu_from, \
- __cu_len); \
- } else { \
- might_fault(); \
- __cu_len = ___invoke_copy_in_user(__cu_to, __cu_from, \
- __cu_len); \
- } \
- __cu_len; \
-})
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
-#define copy_in_user(to, from, n) \
-({ \
- void __user *__cu_to; \
- const void __user *__cu_from; \
- long __cu_len; \
- \
- __cu_to = (to); \
- __cu_from = (from); \
- __cu_len = (n); \
- if (eva_kernel_access()) { \
- __cu_len = ___invoke_copy_in_kernel(__cu_to,__cu_from, \
- __cu_len); \
- } else { \
- if (likely(access_ok(VERIFY_READ, __cu_from, __cu_len) &&\
- access_ok(VERIFY_WRITE, __cu_to, __cu_len))) {\
- might_fault(); \
- __cu_len = ___invoke_copy_in_user(__cu_to, \
- __cu_from, \
- __cu_len); \
- } \
- } \
- __cu_len; \
-})
+static inline unsigned long
+raw_copy_in_user(void __user*to, const void __user *from, unsigned long n)
+{
+ if (eva_kernel_access())
+ return ___invoke_copy_in_kernel(to, from, n);
+ else
+ return ___invoke_copy_in_user(to, from, n);
+}
extern __kernel_size_t __bzero_kernel(void __user *addr, __kernel_size_t size);
extern __kernel_size_t __bzero(void __user *addr, __kernel_size_t size);
OpenPOWER on IntegriCloud