#ifndef __ASSEMBLY__
-/* Sparc is not segmented, however we need to be able to fool verify_area()
+/* Sparc is not segmented, however we need to be able to fool access_ok()
* when doing system calls from kernel mode legitimately.
*
* "For historical reasons, these macros are grossly misnamed." -Linus
* No one can read/write anything from userland in the kernel space by setting
* large size and address near to PAGE_OFFSET - a fault will break his intentions.
*/
-#define __user_ok(addr,size) ((addr) < STACK_TOP)
+#define __user_ok(addr, size) ({ (void)(size); (addr) < STACK_TOP; })
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
#define __access_ok(addr,size) (__user_ok((addr) & get_fs().seg,(size)))
-#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
-
-static inline int verify_area(int type, const void __user * addr, unsigned long size)
-{
- return access_ok(type,addr,size)?0:-EFAULT;
-}
+#define access_ok(type, addr, size) \
+ ({ (void)(type); __access_ok((unsigned long)(addr), size); })
/*
* The exception table consists of pairs of addresses: the first is the
*/
#define put_user(x,ptr) ({ \
unsigned long __pu_addr = (unsigned long)(ptr); \
+__chk_user_ptr(ptr); \
__put_user_check((__typeof__(*(ptr)))(x),__pu_addr,sizeof(*(ptr))); })
#define get_user(x,ptr) ({ \
unsigned long __gu_addr = (unsigned long)(ptr); \
+__chk_user_ptr(ptr); \
__get_user_check((x),__gu_addr,sizeof(*(ptr)),__typeof__(*(ptr))); })
/*
#define __get_user(x,ptr) __get_user_nocheck((x),(ptr),sizeof(*(ptr)),__typeof__(*(ptr)))
struct __large_struct { unsigned long buf[100]; };
-#define __m(x) ((struct __large_struct *)(x))
+#define __m(x) ((struct __large_struct __user *)(x))
#define __put_user_check(x,addr,size) ({ \
register int __pu_ret; \
default: __pu_ret = __put_user_bad(); break; \
} } else { __pu_ret = -EFAULT; } __pu_ret; })
-#define __put_user_check_ret(x,addr,size,retval) ({ \
-register int __foo __asm__ ("l1"); \
-if (__access_ok(addr,size)) { \
-switch (size) { \
-case 1: __put_user_asm_ret(x,b,addr,retval,__foo); break; \
-case 2: __put_user_asm_ret(x,h,addr,retval,__foo); break; \
-case 4: __put_user_asm_ret(x,,addr,retval,__foo); break; \
-case 8: __put_user_asm_ret(x,d,addr,retval,__foo); break; \
-default: if (__put_user_bad()) return retval; break; \
-} } else return retval; })
-
#define __put_user_nocheck(x,addr,size) ({ \
register int __pu_ret; \
switch (size) { \
default: __pu_ret = __put_user_bad(); break; \
} __pu_ret; })
-#define __put_user_nocheck_ret(x,addr,size,retval) ({ \
-register int __foo __asm__ ("l1"); \
-switch (size) { \
-case 1: __put_user_asm_ret(x,b,addr,retval,__foo); break; \
-case 2: __put_user_asm_ret(x,h,addr,retval,__foo); break; \
-case 4: __put_user_asm_ret(x,,addr,retval,__foo); break; \
-case 8: __put_user_asm_ret(x,d,addr,retval,__foo); break; \
-default: if (__put_user_bad()) return retval; break; \
-} })
-
#define __put_user_asm(x,size,addr,ret) \
__asm__ __volatile__( \
"/* Put user asm, inline. */\n" \
: "=&r" (ret) : "r" (x), "m" (*__m(addr)), \
"i" (-EFAULT))
-#define __put_user_asm_ret(x,size,addr,ret,foo) \
-if (__builtin_constant_p(ret) && ret == -EFAULT) \
-__asm__ __volatile__( \
- "/* Put user asm ret, inline. */\n" \
-"1:\t" "st"#size " %1, %2\n\n\t" \
- ".section __ex_table,#alloc\n\t" \
- ".align 4\n\t" \
- ".word 1b, __ret_efault\n\n\t" \
- ".previous\n\n\t" \
- : "=r" (foo) : "r" (x), "m" (*__m(addr))); \
-else \
-__asm__ __volatile( \
- "/* Put user asm ret, inline. */\n" \
-"1:\t" "st"#size " %1, %2\n\n\t" \
- ".section .fixup,#alloc,#execinstr\n\t" \
- ".align 4\n" \
-"3:\n\t" \
- "ret\n\t" \
- " restore %%g0, %3, %%o0\n\t" \
- ".previous\n\n\t" \
- ".section __ex_table,#alloc\n\t" \
- ".align 4\n\t" \
- ".word 1b, 3b\n\n\t" \
- ".previous\n\n\t" \
- : "=r" (foo) : "r" (x), "m" (*__m(addr)), "i" (ret))
-
extern int __put_user_bad(void);
#define __get_user_check(x,addr,size,type) ({ \
extern int __get_user_bad(void);
-extern unsigned long __copy_user(void *to, const void *from, unsigned long size);
+extern unsigned long __copy_user(void __user *to, const void __user *from, unsigned long size);
static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
{
if (n && __access_ok((unsigned long) to, n))
- return __copy_user((void *) to, from, n);
+ return __copy_user(to, (__force void __user *) from, n);
else
return n;
}
static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
{
- return __copy_user((void *)to, from, n);
+ return __copy_user(to, (__force void __user *) from, n);
}
static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (n && __access_ok((unsigned long) from, n))
- return __copy_user(to, (void *) from, n);
+ return __copy_user((__force void __user *) to, from, n);
else
return n;
}
static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
{
- return __copy_user(to, (void *)from, n);
+ return __copy_user((__force void __user *) to, from, n);
}
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
static inline unsigned long __clear_user(void __user *addr, unsigned long size)
{
unsigned long ret;
git://git.onelab.eu / linux-2.6.git / blobdiff