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Diffstat (limited to 'xenolinux-2.4.21-pre4-sparse/include/asm-xeno/uaccess.h')
-rw-r--r--xenolinux-2.4.21-pre4-sparse/include/asm-xeno/uaccess.h606
1 files changed, 0 insertions, 606 deletions
diff --git a/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/uaccess.h b/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/uaccess.h
deleted file mode 100644
index ecc6693352..0000000000
--- a/xenolinux-2.4.21-pre4-sparse/include/asm-xeno/uaccess.h
+++ /dev/null
@@ -1,606 +0,0 @@
-#ifndef __i386_UACCESS_H
-#define __i386_UACCESS_H
-
-/*
- * User space memory access functions
- */
-#include <linux/config.h>
-#include <linux/sched.h>
-#include <linux/prefetch.h>
-#include <asm/page.h>
-
-#define VERIFY_READ 0
-#define VERIFY_WRITE 1
-
-/*
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-
-#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS MAKE_MM_SEG(PAGE_OFFSET)
-
-#define get_ds() (KERNEL_DS)
-#define get_fs() (current->addr_limit)
-#define set_fs(x) (current->addr_limit = (x))
-
-#define segment_eq(a,b) ((a).seg == (b).seg)
-
-extern int __verify_write(const void *, unsigned long);
-
-#define __addr_ok(addr) ((unsigned long)(addr) < (current->addr_limit.seg))
-
-/*
- * Uhhuh, this needs 33-bit arithmetic. We have a carry..
- */
-#define __range_ok(addr,size) ({ \
- unsigned long flag,sum; \
- asm("addl %3,%1 ; sbbl %0,%0; cmpl %1,%4; sbbl $0,%0" \
- :"=&r" (flag), "=r" (sum) \
- :"1" (addr),"g" ((int)(size)),"g" (current->addr_limit.seg)); \
- flag; })
-
-#ifdef CONFIG_X86_WP_WORKS_OK
-
-#define access_ok(type,addr,size) (__range_ok(addr,size) == 0)
-
-#else
-
-#define access_ok(type,addr,size) ( (__range_ok(addr,size) == 0) && \
- ((type) == VERIFY_READ || boot_cpu_data.wp_works_ok || \
- segment_eq(get_fs(),KERNEL_DS) || \
- __verify_write((void *)(addr),(size))))
-
-#endif
-
-static inline int verify_area(int type, const void * addr, unsigned long size)
-{
- return access_ok(type,addr,size) ? 0 : -EFAULT;
-}
-
-
-/*
- * 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.
- *
- * This gets kind of ugly. We want to return _two_ values in "get_user()"
- * and yet we don't want to do any pointers, because that is too much
- * of a performance impact. Thus we have a few rather ugly macros here,
- * and hide all the uglyness from the user.
- *
- * The "__xxx" versions of the user access functions are versions that
- * do not verify the address space, that must have been done previously
- * with a separate "access_ok()" call (this is used when we do multiple
- * accesses to the same area of user memory).
- */
-
-extern void __get_user_1(void);
-extern void __get_user_2(void);
-extern void __get_user_4(void);
-
-#define __get_user_x(size,ret,x,ptr) \
- __asm__ __volatile__("call __get_user_" #size \
- :"=a" (ret),"=d" (x) \
- :"0" (ptr))
-
-/* Careful: we have to cast the result to the type of the pointer for sign reasons */
-#define get_user(x,ptr) \
-({ int __ret_gu,__val_gu; \
- switch(sizeof (*(ptr))) { \
- case 1: __get_user_x(1,__ret_gu,__val_gu,ptr); break; \
- case 2: __get_user_x(2,__ret_gu,__val_gu,ptr); break; \
- case 4: __get_user_x(4,__ret_gu,__val_gu,ptr); break; \
- default: __get_user_x(X,__ret_gu,__val_gu,ptr); break; \
- } \
- (x) = (__typeof__(*(ptr)))__val_gu; \
- __ret_gu; \
-})
-
-extern void __put_user_1(void);
-extern void __put_user_2(void);
-extern void __put_user_4(void);
-extern void __put_user_8(void);
-
-extern void __put_user_bad(void);
-
-#define put_user(x,ptr) \
- __put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-
-#define __get_user(x,ptr) \
- __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
-#define __put_user(x,ptr) \
- __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-
-#define __put_user_nocheck(x,ptr,size) \
-({ \
- long __pu_err; \
- __put_user_size((x),(ptr),(size),__pu_err); \
- __pu_err; \
-})
-
-
-#define __put_user_check(x,ptr,size) \
-({ \
- long __pu_err = -EFAULT; \
- __typeof__(*(ptr)) *__pu_addr = (ptr); \
- if (access_ok(VERIFY_WRITE,__pu_addr,size)) \
- __put_user_size((x),__pu_addr,(size),__pu_err); \
- __pu_err; \
-})
-
-#define __put_user_u64(x, addr, err) \
- __asm__ __volatile__( \
- "1: movl %%eax,0(%2)\n" \
- "2: movl %%edx,4(%2)\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- "4: movl %3,%0\n" \
- " jmp 3b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 1b,4b\n" \
- " .long 2b,4b\n" \
- ".previous" \
- : "=r"(err) \
- : "A" (x), "r" (addr), "i"(-EFAULT), "0"(err))
-
-#define __put_user_size(x,ptr,size,retval) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: __put_user_asm(x,ptr,retval,"b","b","iq"); break; \
- case 2: __put_user_asm(x,ptr,retval,"w","w","ir"); break; \
- case 4: __put_user_asm(x,ptr,retval,"l","","ir"); break; \
- case 8: __put_user_u64(x,ptr,retval); break; \
- default: __put_user_bad(); \
- } \
-} while (0)
-
-struct __large_struct { unsigned long buf[100]; };
-#define __m(x) (*(struct __large_struct *)(x))
-
-/*
- * 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 __put_user_asm(x, addr, err, itype, rtype, ltype) \
- __asm__ __volatile__( \
- "1: mov"itype" %"rtype"1,%2\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movl %3,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 1b,3b\n" \
- ".previous" \
- : "=r"(err) \
- : ltype (x), "m"(__m(addr)), "i"(-EFAULT), "0"(err))
-
-
-#define __get_user_nocheck(x,ptr,size) \
-({ \
- long __gu_err, __gu_val; \
- __get_user_size(__gu_val,(ptr),(size),__gu_err); \
- (x) = (__typeof__(*(ptr)))__gu_val; \
- __gu_err; \
-})
-
-extern long __get_user_bad(void);
-
-#define __get_user_size(x,ptr,size,retval) \
-do { \
- retval = 0; \
- switch (size) { \
- case 1: __get_user_asm(x,ptr,retval,"b","b","=q"); break; \
- case 2: __get_user_asm(x,ptr,retval,"w","w","=r"); break; \
- case 4: __get_user_asm(x,ptr,retval,"l","","=r"); break; \
- default: (x) = __get_user_bad(); \
- } \
-} while (0)
-
-#define __get_user_asm(x, addr, err, itype, rtype, ltype) \
- __asm__ __volatile__( \
- "1: mov"itype" %2,%"rtype"1\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movl %3,%0\n" \
- " xor"itype" %"rtype"1,%"rtype"1\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 1b,3b\n" \
- ".previous" \
- : "=r"(err), ltype (x) \
- : "m"(__m(addr)), "i"(-EFAULT), "0"(err))
-
-
-/*
- * Copy To/From Userspace
- */
-
-/* Generic arbitrary sized copy. */
-#define __copy_user(to,from,size) \
-do { \
- int __d0, __d1; \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- " movl %3,%0\n" \
- "1: rep; movsb\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: lea 0(%3,%0,4),%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,2b\n" \
- ".previous" \
- : "=&c"(size), "=&D" (__d0), "=&S" (__d1) \
- : "r"(size & 3), "0"(size / 4), "1"(to), "2"(from) \
- : "memory"); \
-} while (0)
-
-#define __copy_user_zeroing(to,from,size) \
-do { \
- int __d0, __d1; \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- " movl %3,%0\n" \
- "1: rep; movsb\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: lea 0(%3,%0,4),%0\n" \
- "4: pushl %0\n" \
- " pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " rep; stosb\n" \
- " popl %%eax\n" \
- " popl %0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,4b\n" \
- ".previous" \
- : "=&c"(size), "=&D" (__d0), "=&S" (__d1) \
- : "r"(size & 3), "0"(size / 4), "1"(to), "2"(from) \
- : "memory"); \
-} while (0)
-
-/* We let the __ versions of copy_from/to_user inline, because they're often
- * used in fast paths and have only a small space overhead.
- */
-static inline unsigned long
-__generic_copy_from_user_nocheck(void *to, const void *from, unsigned long n)
-{
- __copy_user_zeroing(to,from,n);
- return n;
-}
-
-static inline unsigned long
-__generic_copy_to_user_nocheck(void *to, const void *from, unsigned long n)
-{
- __copy_user(to,from,n);
- return n;
-}
-
-
-/* Optimize just a little bit when we know the size of the move. */
-#define __constant_copy_user(to, from, size) \
-do { \
- int __d0, __d1; \
- switch (size & 3) { \
- default: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1:\n" \
- ".section .fixup,\"ax\"\n" \
- "2: shl $2,%0\n" \
- " jmp 1b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,2b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 1: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsb\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: shl $2,%0\n" \
- "4: incl %0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,4b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 2: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsw\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: shl $2,%0\n" \
- "4: addl $2,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,4b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 3: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsw\n" \
- "2: movsb\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- "4: shl $2,%0\n" \
- "5: addl $2,%0\n" \
- "6: incl %0\n" \
- " jmp 3b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,4b\n" \
- " .long 1b,5b\n" \
- " .long 2b,6b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- } \
-} while (0)
-
-/* Optimize just a little bit when we know the size of the move. */
-#define __constant_copy_user_zeroing(to, from, size) \
-do { \
- int __d0, __d1; \
- switch (size & 3) { \
- default: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1:\n" \
- ".section .fixup,\"ax\"\n" \
- "2: pushl %0\n" \
- " pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " rep; stosl\n" \
- " popl %%eax\n" \
- " popl %0\n" \
- " shl $2,%0\n" \
- " jmp 1b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,2b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 1: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsb\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: pushl %0\n" \
- " pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " rep; stosl\n" \
- " stosb\n" \
- " popl %%eax\n" \
- " popl %0\n" \
- " shl $2,%0\n" \
- " incl %0\n" \
- " jmp 2b\n" \
- "4: pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " stosb\n" \
- " popl %%eax\n" \
- " incl %0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,4b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 2: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsw\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: pushl %0\n" \
- " pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " rep; stosl\n" \
- " stosw\n" \
- " popl %%eax\n" \
- " popl %0\n" \
- " shl $2,%0\n" \
- " addl $2,%0\n" \
- " jmp 2b\n" \
- "4: pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " stosw\n" \
- " popl %%eax\n" \
- " addl $2,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,3b\n" \
- " .long 1b,4b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- case 3: \
- __asm__ __volatile__( \
- "0: rep; movsl\n" \
- "1: movsw\n" \
- "2: movsb\n" \
- "3:\n" \
- ".section .fixup,\"ax\"\n" \
- "4: pushl %0\n" \
- " pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " rep; stosl\n" \
- " stosw\n" \
- " stosb\n" \
- " popl %%eax\n" \
- " popl %0\n" \
- " shl $2,%0\n" \
- " addl $3,%0\n" \
- " jmp 2b\n" \
- "5: pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " stosw\n" \
- " stosb\n" \
- " popl %%eax\n" \
- " addl $3,%0\n" \
- " jmp 2b\n" \
- "6: pushl %%eax\n" \
- " xorl %%eax,%%eax\n" \
- " stosb\n" \
- " popl %%eax\n" \
- " incl %0\n" \
- " jmp 3b\n" \
- ".previous\n" \
- ".section __ex_table,\"a\"\n" \
- " .align 4\n" \
- " .long 0b,4b\n" \
- " .long 1b,5b\n" \
- " .long 2b,6b\n" \
- ".previous" \
- : "=c"(size), "=&S" (__d0), "=&D" (__d1)\
- : "1"(from), "2"(to), "0"(size/4) \
- : "memory"); \
- break; \
- } \
-} while (0)
-
-unsigned long __generic_copy_to_user(void *, const void *, unsigned long);
-unsigned long __generic_copy_from_user(void *, const void *, unsigned long);
-
-static inline unsigned long
-__constant_copy_to_user(void *to, const void *from, unsigned long n)
-{
- prefetch(from);
- if (access_ok(VERIFY_WRITE, to, n))
- __constant_copy_user(to,from,n);
- return n;
-}
-
-static inline unsigned long
-__constant_copy_from_user(void *to, const void *from, unsigned long n)
-{
- if (access_ok(VERIFY_READ, from, n))
- __constant_copy_user_zeroing(to,from,n);
- else
- memset(to, 0, n);
- return n;
-}
-
-static inline unsigned long
-__constant_copy_to_user_nocheck(void *to, const void *from, unsigned long n)
-{
- __constant_copy_user(to,from,n);
- return n;
-}
-
-static inline unsigned long
-__constant_copy_from_user_nocheck(void *to, const void *from, unsigned long n)
-{
- __constant_copy_user_zeroing(to,from,n);
- return n;
-}
-
-#define copy_to_user(to,from,n) \
- (__builtin_constant_p(n) ? \
- __constant_copy_to_user((to),(from),(n)) : \
- __generic_copy_to_user((to),(from),(n)))
-
-#define copy_from_user(to,from,n) \
- (__builtin_constant_p(n) ? \
- __constant_copy_from_user((to),(from),(n)) : \
- __generic_copy_from_user((to),(from),(n)))
-
-#define __copy_to_user(to,from,n) \
- (__builtin_constant_p(n) ? \
- __constant_copy_to_user_nocheck((to),(from),(n)) : \
- __generic_copy_to_user_nocheck((to),(from),(n)))
-
-#define __copy_from_user(to,from,n) \
- (__builtin_constant_p(n) ? \
- __constant_copy_from_user_nocheck((to),(from),(n)) : \
- __generic_copy_from_user_nocheck((to),(from),(n)))
-
-long strncpy_from_user(char *dst, const char *src, long count);
-long __strncpy_from_user(char *dst, const char *src, long count);
-#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
-long strnlen_user(const char *str, long n);
-unsigned long clear_user(void *mem, unsigned long len);
-unsigned long __clear_user(void *mem, unsigned long len);
-
-#endif /* __i386_UACCESS_H */
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