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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | /* * linux/include/asm-arm/proc-armv/uaccess.h */ /* * The fs functions are implemented on the ARMV3 and V4 architectures * using the domain register. * * DOMAIN_IO - domain 2 includes all IO only * DOMAIN_KERNEL - domain 1 includes all kernel memory only * DOMAIN_USER - domain 0 includes all user memory only */ #include <asm/hardware.h> #define DOMAIN_CLIENT 1 #define DOMAIN_MANAGER 3 #define DOMAIN_USER_CLIENT ((DOMAIN_CLIENT) << 0) #define DOMAIN_USER_MANAGER ((DOMAIN_MANAGER) << 0) #define DOMAIN_KERNEL_CLIENT ((DOMAIN_CLIENT) << 2) #define DOMAIN_KERNEL_MANAGER ((DOMAIN_MANAGER) << 2) #define DOMAIN_IO_CLIENT ((DOMAIN_CLIENT) << 4) #define DOMAIN_IO_MANAGER ((DOMAIN_MANAGER) << 4) /* * When we want to access kernel memory in the *_user functions, * we change the domain register to KERNEL_DS, thus allowing * unrestricted access */ #define KERNEL_DOMAIN (DOMAIN_USER_CLIENT | DOMAIN_KERNEL_MANAGER | DOMAIN_IO_CLIENT) #define USER_DOMAIN (DOMAIN_USER_CLIENT | DOMAIN_KERNEL_CLIENT | DOMAIN_IO_CLIENT) /* * Note that this is actually 0x1,0000,0000 */ #define KERNEL_DS 0x00000000 #define USER_DS PAGE_OFFSET #define get_ds() (KERNEL_DS) #define get_fs() (current->addr_limit) #define segment_eq(a,b) ((a) == (b)) extern __inline__ void set_fs (mm_segment_t fs) { current->addr_limit = fs; __asm__ __volatile__("mcr p15, 0, %0, c3, c0" : : "r" (fs ? USER_DOMAIN : KERNEL_DOMAIN)); } /* We use 33-bit arithmetic here... */ #define __range_ok(addr,size) ({ \ unsigned long flag, sum; \ __asm__ __volatile__("adds %1, %2, %3; sbccs %1, %1, %0; movcc %0, #0" \ : "=&r" (flag), "=&r" (sum) \ : "r" (addr), "Ir" (size), "0" (current->addr_limit) \ : "cc"); \ flag; }) #define __addr_ok(addr) ({ \ unsigned long flag; \ __asm__ __volatile__("cmp %2, %0; movlo %0, #0" \ : "=&r" (flag) \ : "0" (current->addr_limit), "r" (addr) \ : "cc"); \ (flag == 0); }) #define access_ok(type,addr,size) (__range_ok(addr,size) == 0) #define __put_user_asm_byte(x,addr,err) \ __asm__ __volatile__( \ "1: strbt %1,[%2],#0\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "3: mvn %0, %3\n" \ " b 2b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 3b\n" \ " .previous" \ : "=r" (err) \ : "r" (x), "r" (addr), "i" (EFAULT), "0" (err)) #define __put_user_asm_half(x,addr,err) \ ({ \ unsigned long __temp = (unsigned long)(x); \ __asm__ __volatile__( \ "1: strbt %1,[%3],#0\n" \ "2: strbt %2,[%4],#0\n" \ "3:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "4: mvn %0, %5\n" \ " b 3b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 4b\n" \ " .long 2b, 4b\n" \ " .previous" \ : "=r" (err) \ : "r" (__temp), "r" (__temp >> 8), \ "r" (addr), "r" ((int)(addr) + 1), \ "i" (EFAULT), "0" (err)); \ }) #define __put_user_asm_word(x,addr,err) \ __asm__ __volatile__( \ "1: strt %1,[%2],#0\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "3: mvn %0, %3\n" \ " b 2b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 3b\n" \ " .previous" \ : "=r" (err) \ : "r" (x), "r" (addr), "i" (EFAULT), "0" (err)) #define __get_user_asm_byte(x,addr,err) \ __asm__ __volatile__( \ "1: ldrbt %1,[%2],#0\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "3: mvn %0, %3\n" \ " b 2b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 3b\n" \ " .previous" \ : "=r" (err), "=r" (x) \ : "r" (addr), "i" (EFAULT), "0" (err)) #define __get_user_asm_half(x,addr,err) \ ({ \ unsigned long __temp; \ __asm__ __volatile__( \ "1: ldrbt %1,[%3],#0\n" \ "2: ldrbt %2,[%4],#0\n" \ " orr %1, %1, %2, lsl #8\n" \ "3:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "4: mvn %0, %5\n" \ " b 3b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 4b\n" \ " .long 2b, 4b\n" \ " .previous" \ : "=r" (err), "=r" (x), "=&r" (__temp) \ : "r" (addr), "r" ((int)(addr) + 1), \ "i" (EFAULT), "0" (err)); \ }) #define __get_user_asm_word(x,addr,err) \ __asm__ __volatile__( \ "1: ldrt %1,[%2],#0\n" \ "2:\n" \ " .section .fixup,\"ax\"\n" \ " .align 2\n" \ "3: mvn %0, %3\n" \ " b 2b\n" \ " .previous\n" \ " .section __ex_table,\"a\"\n" \ " .align 3\n" \ " .long 1b, 3b\n" \ " .previous" \ : "=r" (err), "=r" (x) \ : "r" (addr), "i" (EFAULT), "0" (err)) extern unsigned long __arch_copy_from_user(void *to, const void *from, unsigned long n); #define __do_copy_from_user(to,from,n) \ (n) = __arch_copy_from_user(to,from,n) extern unsigned long __arch_copy_to_user(void *to, const void *from, unsigned long n); #define __do_copy_to_user(to,from,n) \ (n) = __arch_copy_to_user(to,from,n) extern unsigned long __arch_clear_user(void *addr, unsigned long n); #define __do_clear_user(addr,sz) \ (sz) = __arch_clear_user(addr,sz) extern unsigned long __arch_strncpy_from_user(char *to, const char *from, unsigned long count); #define __do_strncpy_from_user(dst,src,count,res) \ (res) = __arch_strncpy_from_user(dst,src,count) extern unsigned long __arch_strlen_user(const char *s); #define __do_strlen_user(s,res) \ (res) = __arch_strlen_user(s) |