diff options
Diffstat (limited to 'include/asm-sh')
-rw-r--r-- | include/asm-sh/uaccess.h | 564 | ||||
-rw-r--r-- | include/asm-sh/uaccess_32.h | 575 | ||||
-rw-r--r-- | include/asm-sh/uaccess_64.h | 316 |
3 files changed, 894 insertions, 561 deletions
diff --git a/include/asm-sh/uaccess.h b/include/asm-sh/uaccess.h index 77c391f..ff24ce9 100644 --- a/include/asm-sh/uaccess.h +++ b/include/asm-sh/uaccess.h @@ -1,563 +1,5 @@ -/* $Id: uaccess.h,v 1.11 2003/10/13 07:21:20 lethal Exp $ - * - * User space memory access functions - * - * Copyright (C) 1999, 2002 Niibe Yutaka - * Copyright (C) 2003 Paul Mundt - * - * Based on: - * MIPS implementation version 1.15 by - * Copyright (C) 1996, 1997, 1998 by Ralf Baechle - * and i386 version. - */ -#ifndef __ASM_SH_UACCESS_H -#define __ASM_SH_UACCESS_H - -#include <linux/errno.h> -#include <linux/sched.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 (Data Segment Register?), these macros are misnamed. - */ - -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL) -#define USER_DS MAKE_MM_SEG(PAGE_OFFSET) - -#define segment_eq(a,b) ((a).seg == (b).seg) - -#define get_ds() (KERNEL_DS) - -#if !defined(CONFIG_MMU) -/* NOMMU is always true */ -#define __addr_ok(addr) (1) - -static inline mm_segment_t get_fs(void) -{ - return USER_DS; -} - -static inline void set_fs(mm_segment_t s) -{ -} - -/* - * __access_ok: Check if address with size is OK or not. - * - * If we don't have an MMU (or if its disabled) the only thing we really have - * to look out for is if the address resides somewhere outside of what - * available RAM we have. - * - * TODO: This check could probably also stand to be restricted somewhat more.. - * though it still does the Right Thing(tm) for the time being. - */ -static inline int __access_ok(unsigned long addr, unsigned long size) -{ - return ((addr >= memory_start) && ((addr + size) < memory_end)); -} -#else /* CONFIG_MMU */ -#define __addr_ok(addr) \ - ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg)) - -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(x) (current_thread_info()->addr_limit = (x)) - -/* - * __access_ok: Check if address with size is OK or not. - * - * Uhhuh, this needs 33-bit arithmetic. We have a carry.. - * - * sum := addr + size; carry? --> flag = true; - * if (sum >= addr_limit) flag = true; - */ -static inline int __access_ok(unsigned long addr, unsigned long size) -{ - unsigned long flag, sum; - - __asm__("clrt\n\t" - "addc %3, %1\n\t" - "movt %0\n\t" - "cmp/hi %4, %1\n\t" - "rotcl %0" - :"=&r" (flag), "=r" (sum) - :"1" (addr), "r" (size), - "r" (current_thread_info()->addr_limit.seg) - :"t"); - return flag == 0; - -} -#endif /* CONFIG_MMU */ - -static inline int access_ok(int type, const void __user *p, unsigned long size) -{ - unsigned long addr = (unsigned long)p; - return __access_ok(addr, size); -} - -/* - * Uh, these should become the main single-value transfer routines ... - * They automatically use the right size if we just have the right - * pointer type ... - * - * As SuperH uses the same address space for kernel and user data, we - * can just do these as direct assignments. - * - * Careful to not - * (a) re-use the arguments for side effects (sizeof is ok) - * (b) require any knowledge of processes at this stage - */ -#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr))) -#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr))) - -/* - * The "__xxx" versions do not do address space checking, useful when - * doing multiple accesses to the same area (the user has to do the - * checks by hand with "access_ok()") - */ -#define __put_user(x,ptr) \ - __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr))) -#define __get_user(x,ptr) \ - __get_user_nocheck((x),(ptr),sizeof(*(ptr))) - -struct __large_struct { unsigned long buf[100]; }; -#define __m(x) (*(struct __large_struct __user *)(x)) - -#define __get_user_size(x,ptr,size,retval) \ -do { \ - retval = 0; \ - __chk_user_ptr(ptr); \ - switch (size) { \ - case 1: \ - __get_user_asm(x, ptr, retval, "b"); \ - break; \ - case 2: \ - __get_user_asm(x, ptr, retval, "w"); \ - break; \ - case 4: \ - __get_user_asm(x, ptr, retval, "l"); \ - break; \ - default: \ - __get_user_unknown(); \ - break; \ - } \ -} while (0) - -#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; \ -}) - -#ifdef CONFIG_MMU -#define __get_user_check(x,ptr,size) \ -({ \ - long __gu_err, __gu_val; \ - __chk_user_ptr(ptr); \ - switch (size) { \ - case 1: \ - __get_user_1(__gu_val, (ptr), __gu_err); \ - break; \ - case 2: \ - __get_user_2(__gu_val, (ptr), __gu_err); \ - break; \ - case 4: \ - __get_user_4(__gu_val, (ptr), __gu_err); \ - break; \ - default: \ - __get_user_unknown(); \ - break; \ - } \ - \ - (x) = (__typeof__(*(ptr)))__gu_val; \ - __gu_err; \ -}) - -#define __get_user_1(x,addr,err) ({ \ -__asm__("stc r7_bank, %1\n\t" \ - "mov.l @(8,%1), %1\n\t" \ - "and %2, %1\n\t" \ - "cmp/pz %1\n\t" \ - "bt/s 1f\n\t" \ - " mov #0, %0\n\t" \ - "0:\n" \ - "mov #-14, %0\n\t" \ - "bra 2f\n\t" \ - " mov #0, %1\n" \ - "1:\n\t" \ - "mov.b @%2, %1\n\t" \ - "extu.b %1, %1\n" \ - "2:\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 0b\n\t" \ - ".previous" \ - : "=&r" (err), "=&r" (x) \ - : "r" (addr) \ - : "t"); \ -}) - -#define __get_user_2(x,addr,err) ({ \ -__asm__("stc r7_bank, %1\n\t" \ - "mov.l @(8,%1), %1\n\t" \ - "and %2, %1\n\t" \ - "cmp/pz %1\n\t" \ - "bt/s 1f\n\t" \ - " mov #0, %0\n\t" \ - "0:\n" \ - "mov #-14, %0\n\t" \ - "bra 2f\n\t" \ - " mov #0, %1\n" \ - "1:\n\t" \ - "mov.w @%2, %1\n\t" \ - "extu.w %1, %1\n" \ - "2:\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 0b\n\t" \ - ".previous" \ - : "=&r" (err), "=&r" (x) \ - : "r" (addr) \ - : "t"); \ -}) - -#define __get_user_4(x,addr,err) ({ \ -__asm__("stc r7_bank, %1\n\t" \ - "mov.l @(8,%1), %1\n\t" \ - "and %2, %1\n\t" \ - "cmp/pz %1\n\t" \ - "bt/s 1f\n\t" \ - " mov #0, %0\n\t" \ - "0:\n" \ - "mov #-14, %0\n\t" \ - "bra 2f\n\t" \ - " mov #0, %1\n" \ - "1:\n\t" \ - "mov.l @%2, %1\n\t" \ - "2:\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 0b\n\t" \ - ".previous" \ - : "=&r" (err), "=&r" (x) \ - : "r" (addr) \ - : "t"); \ -}) -#else /* CONFIG_MMU */ -#define __get_user_check(x,ptr,size) \ -({ \ - long __gu_err, __gu_val; \ - if (__access_ok((unsigned long)(ptr), (size))) { \ - __get_user_size(__gu_val, (ptr), (size), __gu_err); \ - (x) = (__typeof__(*(ptr)))__gu_val; \ - } else \ - __gu_err = -EFAULT; \ - __gu_err; \ -}) -#endif - -#define __get_user_asm(x, addr, err, insn) \ -({ \ -__asm__ __volatile__( \ - "1:\n\t" \ - "mov." insn " %2, %1\n\t" \ - "mov #0, %0\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3:\n\t" \ - "mov #0, %1\n\t" \ - "mov.l 4f, %0\n\t" \ - "jmp @%0\n\t" \ - " mov %3, %0\n" \ - "4: .long 2b\n\t" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 3b\n\t" \ - ".previous" \ - :"=&r" (err), "=&r" (x) \ - :"m" (__m(addr)), "i" (-EFAULT)); }) - -extern void __get_user_unknown(void); - -#define __put_user_size(x,ptr,size,retval) \ -do { \ - retval = 0; \ - __chk_user_ptr(ptr); \ - switch (size) { \ - case 1: \ - __put_user_asm(x, ptr, retval, "b"); \ - break; \ - case 2: \ - __put_user_asm(x, ptr, retval, "w"); \ - break; \ - case 4: \ - __put_user_asm(x, ptr, retval, "l"); \ - break; \ - case 8: \ - __put_user_u64(x, ptr, retval); \ - break; \ - default: \ - __put_user_unknown(); \ - } \ -} while (0) - -#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)) __user *__pu_addr = (ptr); \ - \ - if (__access_ok((unsigned long)__pu_addr,size)) \ - __put_user_size((x),__pu_addr,(size),__pu_err); \ - __pu_err; \ -}) - -#define __put_user_asm(x, addr, err, insn) \ -({ \ -__asm__ __volatile__( \ - "1:\n\t" \ - "mov." insn " %1, %2\n\t" \ - "mov #0, %0\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3:\n\t" \ - "nop\n\t" \ - "mov.l 4f, %0\n\t" \ - "jmp @%0\n\t" \ - "mov %3, %0\n" \ - "4: .long 2b\n\t" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 3b\n\t" \ - ".previous" \ - :"=&r" (err) \ - :"r" (x), "m" (__m(addr)), "i" (-EFAULT) \ - :"memory"); }) - -#if defined(__LITTLE_ENDIAN__) -#define __put_user_u64(val,addr,retval) \ -({ \ -__asm__ __volatile__( \ - "1:\n\t" \ - "mov.l %R1,%2\n\t" \ - "mov.l %S1,%T2\n\t" \ - "mov #0,%0\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3:\n\t" \ - "nop\n\t" \ - "mov.l 4f,%0\n\t" \ - "jmp @%0\n\t" \ - " mov %3,%0\n" \ - "4: .long 2b\n\t" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 3b\n\t" \ - ".previous" \ - : "=r" (retval) \ - : "r" (val), "m" (__m(addr)), "i" (-EFAULT) \ - : "memory"); }) +#ifdef CONFIG_SUPERH32 +# include "uaccess_32.h" #else -#define __put_user_u64(val,addr,retval) \ -({ \ -__asm__ __volatile__( \ - "1:\n\t" \ - "mov.l %S1,%2\n\t" \ - "mov.l %R1,%T2\n\t" \ - "mov #0,%0\n" \ - "2:\n" \ - ".section .fixup,\"ax\"\n" \ - "3:\n\t" \ - "nop\n\t" \ - "mov.l 4f,%0\n\t" \ - "jmp @%0\n\t" \ - " mov %3,%0\n" \ - "4: .long 2b\n\t" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n\t" \ - ".long 1b, 3b\n\t" \ - ".previous" \ - : "=r" (retval) \ - : "r" (val), "m" (__m(addr)), "i" (-EFAULT) \ - : "memory"); }) +# include "uaccess_64.h" #endif - -extern void __put_user_unknown(void); - -/* Generic arbitrary sized copy. */ -/* Return the number of bytes NOT copied */ -__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); - -#define copy_to_user(to,from,n) ({ \ -void *__copy_to = (void *) (to); \ -__kernel_size_t __copy_size = (__kernel_size_t) (n); \ -__kernel_size_t __copy_res; \ -if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \ -__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \ -} else __copy_res = __copy_size; \ -__copy_res; }) - -#define copy_from_user(to,from,n) ({ \ -void *__copy_to = (void *) (to); \ -void *__copy_from = (void *) (from); \ -__kernel_size_t __copy_size = (__kernel_size_t) (n); \ -__kernel_size_t __copy_res; \ -if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \ -__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \ -} else __copy_res = __copy_size; \ -__copy_res; }) - -static __always_inline unsigned long -__copy_from_user(void *to, const void __user *from, unsigned long n) -{ - return __copy_user(to, (__force void *)from, n); -} - -static __always_inline unsigned long __must_check -__copy_to_user(void __user *to, const void *from, unsigned long n) -{ - return __copy_user((__force void *)to, from, n); -} - -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user - -/* - * Clear the area and return remaining number of bytes - * (on failure. Usually it's 0.) - */ -extern __kernel_size_t __clear_user(void *addr, __kernel_size_t size); - -#define clear_user(addr,n) ({ \ -void * __cl_addr = (addr); \ -unsigned long __cl_size = (n); \ -if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \ -__cl_size = __clear_user(__cl_addr, __cl_size); \ -__cl_size; }) - -static __inline__ int -__strncpy_from_user(unsigned long __dest, unsigned long __user __src, int __count) -{ - __kernel_size_t res; - unsigned long __dummy, _d, _s; - - __asm__ __volatile__( - "9:\n" - "mov.b @%2+, %1\n\t" - "cmp/eq #0, %1\n\t" - "bt/s 2f\n" - "1:\n" - "mov.b %1, @%3\n\t" - "dt %7\n\t" - "bf/s 9b\n\t" - " add #1, %3\n\t" - "2:\n\t" - "sub %7, %0\n" - "3:\n" - ".section .fixup,\"ax\"\n" - "4:\n\t" - "mov.l 5f, %1\n\t" - "jmp @%1\n\t" - " mov %8, %0\n\t" - ".balign 4\n" - "5: .long 3b\n" - ".previous\n" - ".section __ex_table,\"a\"\n" - " .balign 4\n" - " .long 9b,4b\n" - ".previous" - : "=r" (res), "=&z" (__dummy), "=r" (_s), "=r" (_d) - : "0" (__count), "2" (__src), "3" (__dest), "r" (__count), - "i" (-EFAULT) - : "memory", "t"); - - return res; -} - -#define strncpy_from_user(dest,src,count) ({ \ -unsigned long __sfu_src = (unsigned long) (src); \ -int __sfu_count = (int) (count); \ -long __sfu_res = -EFAULT; \ -if(__access_ok(__sfu_src, __sfu_count)) { \ -__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \ -} __sfu_res; }) - -/* - * Return the size of a string (including the ending 0!) - */ -static __inline__ long __strnlen_user(const char __user *__s, long __n) -{ - unsigned long res; - unsigned long __dummy; - - __asm__ __volatile__( - "9:\n" - "cmp/eq %4, %0\n\t" - "bt 2f\n" - "1:\t" - "mov.b @(%0,%3), %1\n\t" - "tst %1, %1\n\t" - "bf/s 9b\n\t" - " add #1, %0\n" - "2:\n" - ".section .fixup,\"ax\"\n" - "3:\n\t" - "mov.l 4f, %1\n\t" - "jmp @%1\n\t" - " mov #0, %0\n" - ".balign 4\n" - "4: .long 2b\n" - ".previous\n" - ".section __ex_table,\"a\"\n" - " .balign 4\n" - " .long 1b,3b\n" - ".previous" - : "=z" (res), "=&r" (__dummy) - : "0" (0), "r" (__s), "r" (__n) - : "t"); - return res; -} - -static __inline__ long strnlen_user(const char __user *s, long n) -{ - if (!__addr_ok(s)) - return 0; - else - return __strnlen_user(s, n); -} - -#define strlen_user(str) strnlen_user(str, ~0UL >> 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; -}; - -extern int fixup_exception(struct pt_regs *regs); - -#endif /* __ASM_SH_UACCESS_H */ diff --git a/include/asm-sh/uaccess_32.h b/include/asm-sh/uaccess_32.h new file mode 100644 index 0000000..f18a1a5 --- /dev/null +++ b/include/asm-sh/uaccess_32.h @@ -0,0 +1,575 @@ +/* $Id: uaccess.h,v 1.11 2003/10/13 07:21:20 lethal Exp $ + * + * User space memory access functions + * + * Copyright (C) 1999, 2002 Niibe Yutaka + * Copyright (C) 2003 Paul Mundt + * + * Based on: + * MIPS implementation version 1.15 by + * Copyright (C) 1996, 1997, 1998 by Ralf Baechle + * and i386 version. + */ +#ifndef __ASM_SH_UACCESS_H +#define __ASM_SH_UACCESS_H + +#include <linux/errno.h> +#include <linux/sched.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 (Data Segment Register?), these macros are misnamed. + */ + +#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) + +#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFFUL) +#define USER_DS MAKE_MM_SEG(PAGE_OFFSET) + +#define segment_eq(a,b) ((a).seg == (b).seg) + +#define get_ds() (KERNEL_DS) + +#if !defined(CONFIG_MMU) +/* NOMMU is always true */ +#define __addr_ok(addr) (1) + +static inline mm_segment_t get_fs(void) +{ + return USER_DS; +} + +static inline void set_fs(mm_segment_t s) +{ +} + +/* + * __access_ok: Check if address with size is OK or not. + * + * If we don't have an MMU (or if its disabled) the only thing we really have + * to look out for is if the address resides somewhere outside of what + * available RAM we have. + * + * TODO: This check could probably also stand to be restricted somewhat more.. + * though it still does the Right Thing(tm) for the time being. + */ +static inline int __access_ok(unsigned long addr, unsigned long size) +{ + return ((addr >= memory_start) && ((addr + size) < memory_end)); +} +#else /* CONFIG_MMU */ +#define __addr_ok(addr) \ + ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg)) + +#define get_fs() (current_thread_info()->addr_limit) +#define set_fs(x) (current_thread_info()->addr_limit = (x)) + +/* + * __access_ok: Check if address with size is OK or not. + * + * We do three checks: + * (1) is it user space? + * (2) addr + size --> carry? + * (3) addr + size >= 0x80000000 (PAGE_OFFSET) + * + * (1) (2) (3) | RESULT + * 0 0 0 | ok + * 0 0 1 | ok + * 0 1 0 | bad + * 0 1 1 | bad + * 1 0 0 | ok + * 1 0 1 | bad + * 1 1 0 | bad + * 1 1 1 | bad + */ +static inline int __access_ok(unsigned long addr, unsigned long size) +{ + unsigned long flag, tmp; + + __asm__("stc r7_bank, %0\n\t" + "mov.l @(8,%0), %0\n\t" + "clrt\n\t" + "addc %2, %1\n\t" + "and %1, %0\n\t" + "rotcl %0\n\t" + "rotcl %0\n\t" + "and #3, %0" + : "=&z" (flag), "=r" (tmp) + : "r" (addr), "1" (size) + : "t"); + + return flag == 0; +} +#endif /* CONFIG_MMU */ + +static inline int access_ok(int type, const void __user *p, unsigned long size) +{ + unsigned long addr = (unsigned long)p; + return __access_ok(addr, size); +} + +/* + * Uh, these should become the main single-value transfer routines ... + * They automatically use the right size if we just have the right + * pointer type ... + * + * As SuperH uses the same address space for kernel and user data, we + * can just do these as direct assignments. + * + * Careful to not + * (a) re-use the arguments for side effects (sizeof is ok) + * (b) require any knowledge of processes at this stage + */ +#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr))) +#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr))) + +/* + * The "__xxx" versions do not do address space checking, useful when + * doing multiple accesses to the same area (the user has to do the + * checks by hand with "access_ok()") + */ +#define __put_user(x,ptr) \ + __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr))) +#define __get_user(x,ptr) \ + __get_user_nocheck((x),(ptr),sizeof(*(ptr))) + +struct __large_struct { unsigned long buf[100]; }; +#define __m(x) (*(struct __large_struct __user *)(x)) + +#define __get_user_size(x,ptr,size,retval) \ +do { \ + retval = 0; \ + __chk_user_ptr(ptr); \ + switch (size) { \ + case 1: \ + __get_user_asm(x, ptr, retval, "b"); \ + break; \ + case 2: \ + __get_user_asm(x, ptr, retval, "w"); \ + break; \ + case 4: \ + __get_user_asm(x, ptr, retval, "l"); \ + break; \ + default: \ + __get_user_unknown(); \ + break; \ + } \ +} while (0) + +#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; \ +}) + +#ifdef CONFIG_MMU +#define __get_user_check(x,ptr,size) \ +({ \ + long __gu_err, __gu_val; \ + __chk_user_ptr(ptr); \ + switch (size) { \ + case 1: \ + __get_user_1(__gu_val, (ptr), __gu_err); \ + break; \ + case 2: \ + __get_user_2(__gu_val, (ptr), __gu_err); \ + break; \ + case 4: \ + __get_user_4(__gu_val, (ptr), __gu_err); \ + break; \ + default: \ + __get_user_unknown(); \ + break; \ + } \ + \ + (x) = (__typeof__(*(ptr)))__gu_val; \ + __gu_err; \ +}) + +#define __get_user_1(x,addr,err) ({ \ +__asm__("stc r7_bank, %1\n\t" \ + "mov.l @(8,%1), %1\n\t" \ + "and %2, %1\n\t" \ + "cmp/pz %1\n\t" \ + "bt/s 1f\n\t" \ + " mov #0, %0\n\t" \ + "0:\n" \ + "mov #-14, %0\n\t" \ + "bra 2f\n\t" \ + " mov #0, %1\n" \ + "1:\n\t" \ + "mov.b @%2, %1\n\t" \ + "extu.b %1, %1\n" \ + "2:\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 0b\n\t" \ + ".previous" \ + : "=&r" (err), "=&r" (x) \ + : "r" (addr) \ + : "t"); \ +}) + +#define __get_user_2(x,addr,err) ({ \ +__asm__("stc r7_bank, %1\n\t" \ + "mov.l @(8,%1), %1\n\t" \ + "and %2, %1\n\t" \ + "cmp/pz %1\n\t" \ + "bt/s 1f\n\t" \ + " mov #0, %0\n\t" \ + "0:\n" \ + "mov #-14, %0\n\t" \ + "bra 2f\n\t" \ + " mov #0, %1\n" \ + "1:\n\t" \ + "mov.w @%2, %1\n\t" \ + "extu.w %1, %1\n" \ + "2:\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 0b\n\t" \ + ".previous" \ + : "=&r" (err), "=&r" (x) \ + : "r" (addr) \ + : "t"); \ +}) + +#define __get_user_4(x,addr,err) ({ \ +__asm__("stc r7_bank, %1\n\t" \ + "mov.l @(8,%1), %1\n\t" \ + "and %2, %1\n\t" \ + "cmp/pz %1\n\t" \ + "bt/s 1f\n\t" \ + " mov #0, %0\n\t" \ + "0:\n" \ + "mov #-14, %0\n\t" \ + "bra 2f\n\t" \ + " mov #0, %1\n" \ + "1:\n\t" \ + "mov.l @%2, %1\n\t" \ + "2:\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 0b\n\t" \ + ".previous" \ + : "=&r" (err), "=&r" (x) \ + : "r" (addr) \ + : "t"); \ +}) +#else /* CONFIG_MMU */ +#define __get_user_check(x,ptr,size) \ +({ \ + long __gu_err, __gu_val; \ + if (__access_ok((unsigned long)(ptr), (size))) { \ + __get_user_size(__gu_val, (ptr), (size), __gu_err); \ + (x) = (__typeof__(*(ptr)))__gu_val; \ + } else \ + __gu_err = -EFAULT; \ + __gu_err; \ +}) +#endif + +#define __get_user_asm(x, addr, err, insn) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov." insn " %2, %1\n\t" \ + "mov #0, %0\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "mov #0, %1\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + " mov %3, %0\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + :"=&r" (err), "=&r" (x) \ + :"m" (__m(addr)), "i" (-EFAULT)); }) + +extern void __get_user_unknown(void); + +#define __put_user_size(x,ptr,size,retval) \ +do { \ + retval = 0; \ + __chk_user_ptr(ptr); \ + switch (size) { \ + case 1: \ + __put_user_asm(x, ptr, retval, "b"); \ + break; \ + case 2: \ + __put_user_asm(x, ptr, retval, "w"); \ + break; \ + case 4: \ + __put_user_asm(x, ptr, retval, "l"); \ + break; \ + case 8: \ + __put_user_u64(x, ptr, retval); \ + break; \ + default: \ + __put_user_unknown(); \ + } \ +} while (0) + +#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)) __user *__pu_addr = (ptr); \ + \ + if (__access_ok((unsigned long)__pu_addr,size)) \ + __put_user_size((x),__pu_addr,(size),__pu_err); \ + __pu_err; \ +}) + +#define __put_user_asm(x, addr, err, insn) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov." insn " %1, %2\n\t" \ + "mov #0, %0\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "nop\n\t" \ + "mov.l 4f, %0\n\t" \ + "jmp @%0\n\t" \ + "mov %3, %0\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + :"=&r" (err) \ + :"r" (x), "m" (__m(addr)), "i" (-EFAULT) \ + :"memory"); }) + +#if defined(__LITTLE_ENDIAN__) +#define __put_user_u64(val,addr,retval) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %R1,%2\n\t" \ + "mov.l %S1,%T2\n\t" \ + "mov #0,%0\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "nop\n\t" \ + "mov.l 4f,%0\n\t" \ + "jmp @%0\n\t" \ + " mov %3,%0\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + : "=r" (retval) \ + : "r" (val), "m" (__m(addr)), "i" (-EFAULT) \ + : "memory"); }) +#else +#define __put_user_u64(val,addr,retval) \ +({ \ +__asm__ __volatile__( \ + "1:\n\t" \ + "mov.l %S1,%2\n\t" \ + "mov.l %R1,%T2\n\t" \ + "mov #0,%0\n" \ + "2:\n" \ + ".section .fixup,\"ax\"\n" \ + "3:\n\t" \ + "nop\n\t" \ + "mov.l 4f,%0\n\t" \ + "jmp @%0\n\t" \ + " mov %3,%0\n" \ + "4: .long 2b\n\t" \ + ".previous\n" \ + ".section __ex_table,\"a\"\n\t" \ + ".long 1b, 3b\n\t" \ + ".previous" \ + : "=r" (retval) \ + : "r" (val), "m" (__m(addr)), "i" (-EFAULT) \ + : "memory"); }) +#endif + +extern void __put_user_unknown(void); + +/* Generic arbitrary sized copy. */ +/* Return the number of bytes NOT copied */ +__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n); + +#define copy_to_user(to,from,n) ({ \ +void *__copy_to = (void *) (to); \ +__kernel_size_t __copy_size = (__kernel_size_t) (n); \ +__kernel_size_t __copy_res; \ +if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \ +__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \ +} else __copy_res = __copy_size; \ +__copy_res; }) + +#define copy_from_user(to,from,n) ({ \ +void *__copy_to = (void *) (to); \ +void *__copy_from = (void *) (from); \ +__kernel_size_t __copy_size = (__kernel_size_t) (n); \ +__kernel_size_t __copy_res; \ +if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \ +__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \ +} else __copy_res = __copy_size; \ +__copy_res; }) + +static __always_inline unsigned long +__copy_from_user(void *to, const void __user *from, unsigned long n) +{ + return __copy_user(to, (__force void *)from, n); +} + +static __always_inline unsigned long __must_check +__copy_to_user(void __user *to, const void *from, unsigned long n) +{ + return __copy_user((__force void *)to, from, n); +} + +#define __copy_to_user_inatomic __copy_to_user +#define __copy_from_user_inatomic __copy_from_user + +/* + * Clear the area and return remaining number of bytes + * (on failure. Usually it's 0.) + */ +extern __kernel_size_t __clear_user(void *addr, __kernel_size_t size); + +#define clear_user(addr,n) ({ \ +void * __cl_addr = (addr); \ +unsigned long __cl_size = (n); \ +if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \ +__cl_size = __clear_user(__cl_addr, __cl_size); \ +__cl_size; }) + +static __inline__ int +__strncpy_from_user(unsigned long __dest, unsigned long __user __src, int __count) +{ + __kernel_size_t res; + unsigned long __dummy, _d, _s; + + __asm__ __volatile__( + "9:\n" + "mov.b @%2+, %1\n\t" + "cmp/eq #0, %1\n\t" + "bt/s 2f\n" + "1:\n" + "mov.b %1, @%3\n\t" + "dt %7\n\t" + "bf/s 9b\n\t" + " add #1, %3\n\t" + "2:\n\t" + "sub %7, %0\n" + "3:\n" + ".section .fixup,\"ax\"\n" + "4:\n\t" + "mov.l 5f, %1\n\t" + "jmp @%1\n\t" + " mov %8, %0\n\t" + ".balign 4\n" + "5: .long 3b\n" + ".previous\n" + ".section __ex_table,\"a\"\n" + " .balign 4\n" + " .long 9b,4b\n" + ".previous" + : "=r" (res), "=&z" (__dummy), "=r" (_s), "=r" (_d) + : "0" (__count), "2" (__src), "3" (__dest), "r" (__count), + "i" (-EFAULT) + : "memory", "t"); + + return res; +} + +#define strncpy_from_user(dest,src,count) ({ \ +unsigned long __sfu_src = (unsigned long) (src); \ +int __sfu_count = (int) (count); \ +long __sfu_res = -EFAULT; \ +if(__access_ok(__sfu_src, __sfu_count)) { \ +__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \ +} __sfu_res; }) + +/* + * Return the size of a string (including the ending 0!) + */ +static __inline__ long __strnlen_user(const char __user *__s, long __n) +{ + unsigned long res; + unsigned long __dummy; + + __asm__ __volatile__( + "9:\n" + "cmp/eq %4, %0\n\t" + "bt 2f\n" + "1:\t" + "mov.b @(%0,%3), %1\n\t" + "tst %1, %1\n\t" + "bf/s 9b\n\t" + " add #1, %0\n" + "2:\n" + ".section .fixup,\"ax\"\n" + "3:\n\t" + "mov.l 4f, %1\n\t" + "jmp @%1\n\t" + " mov #0, %0\n" + ".balign 4\n" + "4: .long 2b\n" + ".previous\n" + ".section __ex_table,\"a\"\n" + " .balign 4\n" + " .long 1b,3b\n" + ".previous" + : "=z" (res), "=&r" (__dummy) + : "0" (0), "r" (__s), "r" (__n) + : "t"); + return res; +} + +static __inline__ long strnlen_user(const char __user *s, long n) +{ + if (!__addr_ok(s)) + return 0; + else + return __strnlen_user(s, n); +} + +#define strlen_user(str) strnlen_user(str, ~0UL >> 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; +}; + +extern int fixup_exception(struct pt_regs *regs); + +#endif /* __ASM_SH_UACCESS_H */ diff --git a/include/asm-sh/uaccess_64.h b/include/asm-sh/uaccess_64.h new file mode 100644 index 0000000..644c67b --- /dev/null +++ b/include/asm-sh/uaccess_64.h @@ -0,0 +1,316 @@ +#ifndef __ASM_SH64_UACCESS_H +#define __ASM_SH64_UACCESS_H + +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * include/asm-sh64/uaccess.h + * + * Copyright (C) 2000, 2001 Paolo Alberelli + * Copyright (C) 2003, 2004 Paul Mundt + * + * User space memory access functions + * + * Copyright (C) 1999 Niibe Yutaka + * + * Based on: + * MIPS implementation version 1.15 by + * Copyright (C) 1996, 1997, 1998 by Ralf Baechle + * and i386 version. + * + */ + +#include <linux/errno.h> +#include <linux/sched.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 (Data Segment Register?), these macros are misnamed. + */ + +#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) + +#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) +#define USER_DS MAKE_MM_SEG(0x80000000) + +#define get_ds() (KERNEL_DS) +#define get_fs() (current_thread_info()->addr_limit) +#define set_fs(x) (current_thread_info()->addr_limit=(x)) + +#define segment_eq(a,b) ((a).seg == (b).seg) + +#define __addr_ok(addr) ((unsigned long)(addr) < (current_thread_info()->addr_limit.seg)) + +/* + * Uhhuh, this needs 33-bit arithmetic. We have a carry.. + * + * sum := addr + size; carry? --> flag = true; + * if (sum >= addr_limit) flag = true; + */ +#define __range_ok(addr,size) (((unsigned long) (addr) + (size) < (current_thread_info()->addr_limit.seg)) ? 0 : 1) + +#define access_ok(type,addr,size) (__range_ok(addr,size) == 0) +#define __access_ok(addr,size) (__range_ok(addr,size) == 0) + +/* + * Uh, these should become the main single-value transfer routines ... + * They automatically use the right size if we just have the right + * pointer type ... + * + * As MIPS uses the same address space for kernel and user data, we + * can just do these as direct assignments. + * + * Careful to not + * (a) re-use the arguments for side effects (sizeof is ok) + * (b) require any knowledge of processes at this stage + */ +#define put_user(x,ptr) __put_user_check((x),(ptr),sizeof(*(ptr))) +#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr))) + +/* + * The "__xxx" versions do not do address space checking, useful when + * doing multiple accesses to the same area (the user has to do the + * checks by hand with "access_ok()") + */ +#define __put_user(x,ptr) __put_user_nocheck((x),(ptr),sizeof(*(ptr))) +#define __get_user(x,ptr) __get_user_nocheck((x),(ptr),sizeof(*(ptr))) + +/* + * The "xxx_ret" versions return constant specified in third argument, if + * something bad happens. These macros can be optimized for the + * case of just returning from the function xxx_ret is used. + */ + +#define put_user_ret(x,ptr,ret) ({ \ +if (put_user(x,ptr)) return ret; }) + +#define get_user_ret(x,ptr,ret) ({ \ +if (get_user(x,ptr)) return ret; }) + +#define __put_user_ret(x,ptr,ret) ({ \ +if (__put_user(x,ptr)) return ret; }) + +#define __get_user_ret(x,ptr,ret) ({ \ +if (__get_user(x,ptr)) return ret; }) + +struct __large_struct { unsigned long buf[100]; }; +#define __m(x) (*(struct __large_struct *)(x)) + +#define __get_user_size(x,ptr,size,retval) \ +do { \ + retval = 0; \ + switch (size) { \ + case 1: \ + retval = __get_user_asm_b(x, ptr); \ + break; \ + case 2: \ + retval = __get_user_asm_w(x, ptr); \ + break; \ + case 4: \ + retval = __get_user_asm_l(x, ptr); \ + break; \ + case 8: \ + retval = __get_user_asm_q(x, ptr); \ + break; \ + default: \ + __get_user_unknown(); \ + break; \ + } \ +} while (0) + +#define __get_user_nocheck(x,ptr,size) \ +({ \ + long __gu_err, __gu_val; \ + __get_user_size((void *)&__gu_val, (long)(ptr), \ + (size), __gu_err); \ + (x) = (__typeof__(*(ptr)))__gu_val; \ + __gu_err; \ +}) + +#define __get_user_check(x,ptr,size) \ +({ \ + long __gu_addr = (long)(ptr); \ + long __gu_err = -EFAULT, __gu_val; \ + if (__access_ok(__gu_addr, (size))) \ + __get_user_size((void *)&__gu_val, __gu_addr, \ + (size), __gu_err); \ + (x) = (__typeof__(*(ptr))) __gu_val; \ + __gu_err; \ +}) + +extern long __get_user_asm_b(void *, long); +extern long __get_user_asm_w(void *, long); +extern long __get_user_asm_l(void *, long); +extern long __get_user_asm_q(void *, long); +extern void __get_user_unknown(void); + +#define __put_user_size(x,ptr,size,retval) \ +do { \ + retval = 0; \ + switch (size) { \ + case 1: \ + retval = __put_user_asm_b(x, ptr); \ + break; \ + case 2: \ + retval = __put_user_asm_w(x, ptr); \ + break; \ + case 4: \ + retval = __put_user_asm_l(x, ptr); \ + break; \ + case 8: \ + retval = __put_user_asm_q(x, ptr); \ + break; \ + default: \ + __put_user_unknown(); \ + } \ +} while (0) + +#define __put_user_nocheck(x,ptr,size) \ +({ \ + long __pu_err; \ + __typeof__(*(ptr)) __pu_val = (x); \ + __put_user_size((void *)&__pu_val, (long)(ptr), (size), __pu_err); \ + __pu_err; \ +}) + +#define __put_user_check(x,ptr,size) \ +({ \ + long __pu_err = -EFAULT; \ + long __pu_addr = (long)(ptr); \ + __typeof__(*(ptr)) __pu_val = (x); \ + \ + if (__access_ok(__pu_addr, (size))) \ + __put_user_size((void *)&__pu_val, __pu_addr, (size), __pu_err);\ + __pu_err; \ +}) + +extern long __put_user_asm_b(void *, long); +extern long __put_user_asm_w(void *, long); +extern long __put_user_asm_l(void *, long); +extern long __put_user_asm_q(void *, long); +extern void __put_user_unknown(void); + + +/* Generic arbitrary sized copy. */ +/* Return the number of bytes NOT copied */ +/* XXX: should be such that: 4byte and the rest. */ +extern __kernel_size_t __copy_user(void *__to, const void *__from, __kernel_size_t __n); + +#define copy_to_user(to,from,n) ({ \ +void *__copy_to = (void *) (to); \ +__kernel_size_t __copy_size = (__kernel_size_t) (n); \ +__kernel_size_t __copy_res; \ +if(__copy_size && __access_ok((unsigned long)__copy_to, __copy_size)) { \ +__copy_res = __copy_user(__copy_to, (void *) (from), __copy_size); \ +} else __copy_res = __copy_size; \ +__copy_res; }) + +#define copy_to_user_ret(to,from,n,retval) ({ \ +if (copy_to_user(to,from,n)) \ + return retval; \ +}) + +#define __copy_to_user(to,from,n) \ + __copy_user((void *)(to), \ + (void *)(from), n) + +#define __copy_to_user_ret(to,from,n,retval) ({ \ +if (__copy_to_user(to,from,n)) \ + return retval; \ +}) + +#define copy_from_user(to,from,n) ({ \ +void *__copy_to = (void *) (to); \ +void *__copy_from = (void *) (from); \ +__kernel_size_t __copy_size = (__kernel_size_t) (n); \ +__kernel_size_t __copy_res; \ +if(__copy_size && __access_ok((unsigned long)__copy_from, __copy_size)) { \ +__copy_res = __copy_user(__copy_to, __copy_from, __copy_size); \ +} else __copy_res = __copy_size; \ +__copy_res; }) + +#define copy_from_user_ret(to,from,n,retval) ({ \ +if (copy_from_user(to,from,n)) \ + return retval; \ +}) + +#define __copy_from_user(to,from,n) \ + __copy_user((void *)(to), \ + (void *)(from), n) + +#define __copy_from_user_ret(to,from,n,retval) ({ \ +if (__copy_from_user(to,from,n)) \ + return retval; \ +}) + +#define __copy_to_user_inatomic __copy_to_user +#define __copy_from_user_inatomic __copy_from_user + +/* XXX: Not sure it works well.. + should be such that: 4byte clear and the rest. */ +extern __kernel_size_t __clear_user(void *addr, __kernel_size_t size); + +#define clear_user(addr,n) ({ \ +void * __cl_addr = (addr); \ +unsigned long __cl_size = (n); \ +if (__cl_size && __access_ok(((unsigned long)(__cl_addr)), __cl_size)) \ +__cl_size = __clear_user(__cl_addr, __cl_size); \ +__cl_size; }) + +extern int __strncpy_from_user(unsigned long __dest, unsigned long __src, int __count); + +#define strncpy_from_user(dest,src,count) ({ \ +unsigned long __sfu_src = (unsigned long) (src); \ +int __sfu_count = (int) (count); \ +long __sfu_res = -EFAULT; \ +if(__access_ok(__sfu_src, __sfu_count)) { \ +__sfu_res = __strncpy_from_user((unsigned long) (dest), __sfu_src, __sfu_count); \ +} __sfu_res; }) + +#define strlen_user(str) strnlen_user(str, ~0UL >> 1) + +/* + * Return the size of a string (including the ending 0!) + */ +extern long __strnlen_user(const char *__s, long __n); + +static inline long strnlen_user(const char *s, long n) +{ + if (!__addr_ok(s)) + return 0; + else + return __strnlen_user(s, n); +} + +struct exception_table_entry +{ + unsigned long insn, fixup; +}; + +#define ARCH_HAS_SEARCH_EXTABLE + +/* If gcc inlines memset, it will use st.q instructions. Therefore, we need + kmalloc allocations to be 8-byte aligned. Without this, the alignment + becomes BYTE_PER_WORD i.e. only 4 (since sizeof(long)==sizeof(void*)==4 on + sh64 at the moment). */ +#define ARCH_KMALLOC_MINALIGN 8 + +/* + * We want 8-byte alignment for the slab caches as well, otherwise we have + * the same BYTES_PER_WORD (sizeof(void *)) min align in kmem_cache_create(). + */ +#define ARCH_SLAB_MINALIGN 8 + +/* Returns 0 if exception not found and fixup.unit otherwise. */ +extern unsigned long search_exception_table(unsigned long addr); +extern const struct exception_table_entry *search_exception_tables (unsigned long addr); + +#endif /* __ASM_SH64_UACCESS_H */ |