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1276 |
phoenix |
/*
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* linux/include/asm-arm/proc-armv/uaccess.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <asm/arch/memory.h>
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#include <asm/proc/domain.h>
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/*
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* Note that this is actually 0x1,0000,0000
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*/
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#define KERNEL_DS 0x00000000
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#define USER_DS PAGE_OFFSET
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static inline void set_fs (mm_segment_t fs)
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{
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current->addr_limit = fs;
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modify_domain(DOMAIN_KERNEL, fs ? DOMAIN_CLIENT : DOMAIN_MANAGER);
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}
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/* We use 33-bit arithmetic here... */
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#define __range_ok(addr,size) ({ \
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unsigned long flag, sum; \
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__asm__("adds %1, %2, %3; sbcccs %1, %1, %0; movcc %0, #0" \
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: "=&r" (flag), "=&r" (sum) \
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: "r" (addr), "Ir" (size), "0" (current->addr_limit) \
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: "cc"); \
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flag; })
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#define __addr_ok(addr) ({ \
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unsigned long flag; \
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__asm__("cmp %2, %0; movlo %0, #0" \
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: "=&r" (flag) \
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: "0" (current->addr_limit), "r" (addr) \
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: "cc"); \
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(flag == 0); })
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#define __put_user_asm_byte(x,addr,err) \
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__asm__ __volatile__( \
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"1: strbt %1,[%2],#0\n" \
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"2:\n" \
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" .section .fixup,\"ax\"\n" \
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" .align 2\n" \
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"3: mov %0, %3\n" \
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" b 2b\n" \
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" .previous\n" \
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" .section __ex_table,\"a\"\n" \
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" .align 3\n" \
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" .long 1b, 3b\n" \
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" .previous" \
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: "=r" (err) \
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: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err))
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#define __put_user_asm_half(x,addr,err) \
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({ \
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unsigned long __temp = (unsigned long)(x); \
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unsigned long __ptr = (unsigned long)(addr); \
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__put_user_asm_byte(__temp, __ptr, err); \
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__put_user_asm_byte(__temp >> 8, __ptr + 1, err); \
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})
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#define __put_user_asm_word(x,addr,err) \
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__asm__ __volatile__( \
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"1: strt %1,[%2],#0\n" \
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"2:\n" \
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" .section .fixup,\"ax\"\n" \
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" .align 2\n" \
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"3: mov %0, %3\n" \
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" b 2b\n" \
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" .previous\n" \
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" .section __ex_table,\"a\"\n" \
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" .align 3\n" \
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" .long 1b, 3b\n" \
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" .previous" \
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: "=r" (err) \
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: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err))
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#define __get_user_asm_byte(x,addr,err) \
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__asm__ __volatile__( \
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"1: ldrbt %1,[%2],#0\n" \
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"2:\n" \
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" .section .fixup,\"ax\"\n" \
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" .align 2\n" \
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"3: mov %0, %3\n" \
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" mov %1, #0\n" \
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" b 2b\n" \
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" .previous\n" \
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" .section __ex_table,\"a\"\n" \
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" .align 3\n" \
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" .long 1b, 3b\n" \
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" .previous" \
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: "=r" (err), "=&r" (x) \
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: "r" (addr), "i" (-EFAULT), "0" (err))
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#define __get_user_asm_half(x,addr,err) \
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({ \
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unsigned long __b1, __b2, __ptr = (unsigned long)addr; \
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__get_user_asm_byte(__b1, __ptr, err); \
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__get_user_asm_byte(__b2, __ptr + 1, err); \
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(x) = __b1 | (__b2 << 8); \
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})
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#define __get_user_asm_word(x,addr,err) \
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__asm__ __volatile__( \
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"1: ldrt %1,[%2],#0\n" \
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"2:\n" \
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" .section .fixup,\"ax\"\n" \
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" .align 2\n" \
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"3: mov %0, %3\n" \
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" mov %1, #0\n" \
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" b 2b\n" \
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" .previous\n" \
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" .section __ex_table,\"a\"\n" \
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" .align 3\n" \
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" .long 1b, 3b\n" \
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" .previous" \
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: "=r" (err), "=&r" (x) \
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: "r" (addr), "i" (-EFAULT), "0" (err))
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extern unsigned long __arch_copy_from_user(void *to, const void *from, unsigned long n);
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#define __do_copy_from_user(to,from,n) \
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(n) = __arch_copy_from_user(to,from,n)
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extern unsigned long __arch_copy_to_user(void *to, const void *from, unsigned long n);
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#define __do_copy_to_user(to,from,n) \
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(n) = __arch_copy_to_user(to,from,n)
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extern unsigned long __arch_clear_user(void *addr, unsigned long n);
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#define __do_clear_user(addr,sz) \
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(sz) = __arch_clear_user(addr,sz)
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extern unsigned long __arch_strncpy_from_user(char *to, const char *from, unsigned long count);
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#define __do_strncpy_from_user(dst,src,count,res) \
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(res) = __arch_strncpy_from_user(dst,src,count)
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extern unsigned long __arch_strnlen_user(const char *s, long n);
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#define __do_strnlen_user(s,n,res) \
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(res) = __arch_strnlen_user(s,n)
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