1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef _ASMARM_UACCESS_H 13 #define _ASMARM_UACCESS_H 14 15 #include <linux/sched.h> 16 #include <asm/errno.h> 17 #include <asm/memory.h> 18 #include <asm/domain.h> 19 #include <asm/system.h> 20 21 #define VERIFY_READ 0 22 #define VERIFY_WRITE 1 23 24 struct exception_table_entry 25 { 26 unsigned long insn, fixup; 27 }; 28 29 #define KERNEL_DS 0x00000000 30 #define get_ds() (KERNEL_DS) 31 32 #define USER_DS KERNEL_DS 33 34 #define segment_eq(a,b) (1) 35 #define __addr_ok(addr) (1) 36 #define __range_ok(addr,size) (0) 37 #define get_fs() (KERNEL_DS) 38 39 #define get_user(x,p) __get_user(x,p) 40 #define put_user(x,p) __put_user(x,p) 41 #define access_ok(type,addr,size) (__range_ok(addr,size) == 0) 42 #define __get_user(x,ptr) ({ long __gu_err = 0; __get_user_err((x),(ptr),__gu_err); __gu_err; }) 43 #define __get_user_error(x,ptr,err) ({ __get_user_err((x),(ptr),err); (void) 0; }) 44 #define __get_user_err(x,ptr,err) do { unsigned long __gu_addr = (unsigned long)(ptr); unsigned long __gu_val; __chk_user_ptr(ptr); switch (sizeof(*(ptr))) { case 1: __get_user_asm_byte(__gu_val,__gu_addr,err); break; case 2: __get_user_asm_half(__gu_val,__gu_addr,err); break; case 4: __get_user_asm_word(__gu_val,__gu_addr,err); break; default: (__gu_val) = __get_user_bad(); } (x) = (__typeof__(*(ptr)))__gu_val; } while (0) 45 #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: mov %0, %3\n" " mov %1, #0\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) : "cc") 46 #ifndef __ARMEB__ 47 #define __get_user_asm_half(x,__gu_addr,err) ({ unsigned long __b1, __b2; __get_user_asm_byte(__b1, __gu_addr, err); __get_user_asm_byte(__b2, __gu_addr + 1, err); (x) = __b1 | (__b2 << 8); }) 48 #else 49 #define __get_user_asm_half(x,__gu_addr,err) ({ unsigned long __b1, __b2; __get_user_asm_byte(__b1, __gu_addr, err); __get_user_asm_byte(__b2, __gu_addr + 1, err); (x) = (__b1 << 8) | __b2; }) 50 #endif 51 #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: mov %0, %3\n" " mov %1, #0\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) : "cc") 52 #define __put_user(x,ptr) ({ long __pu_err = 0; __put_user_err((x),(ptr),__pu_err); __pu_err; }) 53 #define __put_user_error(x,ptr,err) ({ __put_user_err((x),(ptr),err); (void) 0; }) 54 #define __put_user_err(x,ptr,err) do { unsigned long __pu_addr = (unsigned long)(ptr); __typeof__(*(ptr)) __pu_val = (x); __chk_user_ptr(ptr); switch (sizeof(*(ptr))) { case 1: __put_user_asm_byte(__pu_val,__pu_addr,err); break; case 2: __put_user_asm_half(__pu_val,__pu_addr,err); break; case 4: __put_user_asm_word(__pu_val,__pu_addr,err); break; case 8: __put_user_asm_dword(__pu_val,__pu_addr,err); break; default: __put_user_bad(); } } while (0) 55 #define __put_user_asm_byte(x,__pu_addr,err) __asm__ __volatile__( "1: strbt %1,[%2],#0\n" "2:\n" " .section .fixup,\"ax\"\n" " .align 2\n" "3: mov %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" (__pu_addr), "i" (-EFAULT) : "cc") 56 #ifndef __ARMEB__ 57 #define __put_user_asm_half(x,__pu_addr,err) ({ unsigned long __temp = (unsigned long)(x); __put_user_asm_byte(__temp, __pu_addr, err); __put_user_asm_byte(__temp >> 8, __pu_addr + 1, err); }) 58 #else 59 #define __put_user_asm_half(x,__pu_addr,err) ({ unsigned long __temp = (unsigned long)(x); __put_user_asm_byte(__temp >> 8, __pu_addr, err); __put_user_asm_byte(__temp, __pu_addr + 1, err); }) 60 #endif 61 #define __put_user_asm_word(x,__pu_addr,err) __asm__ __volatile__( "1: strt %1,[%2],#0\n" "2:\n" " .section .fixup,\"ax\"\n" " .align 2\n" "3: mov %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" (__pu_addr), "i" (-EFAULT) : "cc") 62 #ifndef __ARMEB__ 63 #define __reg_oper0 "%R2" 64 #define __reg_oper1 "%Q2" 65 #else 66 #define __reg_oper0 "%Q2" 67 #define __reg_oper1 "%R2" 68 #endif 69 #define __put_user_asm_dword(x,__pu_addr,err) __asm__ __volatile__( "1: strt " __reg_oper1 ", [%1], #4\n" "2: strt " __reg_oper0 ", [%1], #0\n" "3:\n" " .section .fixup,\"ax\"\n" " .align 2\n" "4: mov %0, %3\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" (__pu_addr) : "r" (x), "i" (-EFAULT) : "cc") 70 #define __copy_from_user(to,from,n) (memcpy(to, (void __force *)from, n), 0) 71 #define __copy_to_user(to,from,n) (memcpy((void __force *)to, from, n), 0) 72 #define __clear_user(addr,n) (memset((void __force *)addr, 0, n), 0) 73 74 #define __copy_to_user_inatomic __copy_to_user 75 #define __copy_from_user_inatomic __copy_from_user 76 #define strlen_user(s) strnlen_user(s, ~0UL >> 1) 77 #endif 78