1 #ifndef _ASM_X86_COMPAT_H 2 #define _ASM_X86_COMPAT_H 3 4 /* 5 * Architecture specific compatibility types 6 */ 7 #include <linux/types.h> 8 #include <linux/sched.h> 9 #include <asm/processor.h> 10 #include <asm/user32.h> 11 #include <asm/unistd.h> 12 13 #define COMPAT_USER_HZ 100 14 #define COMPAT_UTS_MACHINE "i686\0\0" 15 16 typedef u32 compat_size_t; 17 typedef s32 compat_ssize_t; 18 typedef s32 compat_time_t; 19 typedef s32 compat_clock_t; 20 typedef s32 compat_pid_t; 21 typedef u16 __compat_uid_t; 22 typedef u16 __compat_gid_t; 23 typedef u32 __compat_uid32_t; 24 typedef u32 __compat_gid32_t; 25 typedef u16 compat_mode_t; 26 typedef u32 compat_ino_t; 27 typedef u16 compat_dev_t; 28 typedef s32 compat_off_t; 29 typedef s64 compat_loff_t; 30 typedef u16 compat_nlink_t; 31 typedef u16 compat_ipc_pid_t; 32 typedef s32 compat_daddr_t; 33 typedef u32 compat_caddr_t; 34 typedef __kernel_fsid_t compat_fsid_t; 35 typedef s32 compat_timer_t; 36 typedef s32 compat_key_t; 37 38 typedef s32 compat_int_t; 39 typedef s32 compat_long_t; 40 typedef s64 __attribute__((aligned(4))) compat_s64; 41 typedef u32 compat_uint_t; 42 typedef u32 compat_ulong_t; 43 typedef u64 __attribute__((aligned(4))) compat_u64; 44 45 struct compat_timespec { 46 compat_time_t tv_sec; 47 s32 tv_nsec; 48 }; 49 50 struct compat_timeval { 51 compat_time_t tv_sec; 52 s32 tv_usec; 53 }; 54 55 struct compat_stat { 56 compat_dev_t st_dev; 57 u16 __pad1; 58 compat_ino_t st_ino; 59 compat_mode_t st_mode; 60 compat_nlink_t st_nlink; 61 __compat_uid_t st_uid; 62 __compat_gid_t st_gid; 63 compat_dev_t st_rdev; 64 u16 __pad2; 65 u32 st_size; 66 u32 st_blksize; 67 u32 st_blocks; 68 u32 st_atime; 69 u32 st_atime_nsec; 70 u32 st_mtime; 71 u32 st_mtime_nsec; 72 u32 st_ctime; 73 u32 st_ctime_nsec; 74 u32 __unused4; 75 u32 __unused5; 76 }; 77 78 struct compat_flock { 79 short l_type; 80 short l_whence; 81 compat_off_t l_start; 82 compat_off_t l_len; 83 compat_pid_t l_pid; 84 }; 85 86 #define F_GETLK64 12 /* using 'struct flock64' */ 87 #define F_SETLK64 13 88 #define F_SETLKW64 14 89 90 /* 91 * IA32 uses 4 byte alignment for 64 bit quantities, 92 * so we need to pack this structure. 93 */ 94 struct compat_flock64 { 95 short l_type; 96 short l_whence; 97 compat_loff_t l_start; 98 compat_loff_t l_len; 99 compat_pid_t l_pid; 100 } __attribute__((packed)); 101 102 struct compat_statfs { 103 int f_type; 104 int f_bsize; 105 int f_blocks; 106 int f_bfree; 107 int f_bavail; 108 int f_files; 109 int f_ffree; 110 compat_fsid_t f_fsid; 111 int f_namelen; /* SunOS ignores this field. */ 112 int f_frsize; 113 int f_flags; 114 int f_spare[4]; 115 }; 116 117 #define COMPAT_RLIM_OLD_INFINITY 0x7fffffff 118 #define COMPAT_RLIM_INFINITY 0xffffffff 119 120 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 121 122 #define _COMPAT_NSIG 64 123 #define _COMPAT_NSIG_BPW 32 124 125 typedef u32 compat_sigset_word; 126 127 #define COMPAT_OFF_T_MAX 0x7fffffff 128 #define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL 129 130 struct compat_ipc64_perm { 131 compat_key_t key; 132 __compat_uid32_t uid; 133 __compat_gid32_t gid; 134 __compat_uid32_t cuid; 135 __compat_gid32_t cgid; 136 unsigned short mode; 137 unsigned short __pad1; 138 unsigned short seq; 139 unsigned short __pad2; 140 compat_ulong_t unused1; 141 compat_ulong_t unused2; 142 }; 143 144 struct compat_semid64_ds { 145 struct compat_ipc64_perm sem_perm; 146 compat_time_t sem_otime; 147 compat_ulong_t __unused1; 148 compat_time_t sem_ctime; 149 compat_ulong_t __unused2; 150 compat_ulong_t sem_nsems; 151 compat_ulong_t __unused3; 152 compat_ulong_t __unused4; 153 }; 154 155 struct compat_msqid64_ds { 156 struct compat_ipc64_perm msg_perm; 157 compat_time_t msg_stime; 158 compat_ulong_t __unused1; 159 compat_time_t msg_rtime; 160 compat_ulong_t __unused2; 161 compat_time_t msg_ctime; 162 compat_ulong_t __unused3; 163 compat_ulong_t msg_cbytes; 164 compat_ulong_t msg_qnum; 165 compat_ulong_t msg_qbytes; 166 compat_pid_t msg_lspid; 167 compat_pid_t msg_lrpid; 168 compat_ulong_t __unused4; 169 compat_ulong_t __unused5; 170 }; 171 172 struct compat_shmid64_ds { 173 struct compat_ipc64_perm shm_perm; 174 compat_size_t shm_segsz; 175 compat_time_t shm_atime; 176 compat_ulong_t __unused1; 177 compat_time_t shm_dtime; 178 compat_ulong_t __unused2; 179 compat_time_t shm_ctime; 180 compat_ulong_t __unused3; 181 compat_pid_t shm_cpid; 182 compat_pid_t shm_lpid; 183 compat_ulong_t shm_nattch; 184 compat_ulong_t __unused4; 185 compat_ulong_t __unused5; 186 }; 187 188 /* 189 * The type of struct elf_prstatus.pr_reg in compatible core dumps. 190 */ 191 #ifdef CONFIG_X86_X32_ABI 192 typedef struct user_regs_struct compat_elf_gregset_t; 193 194 #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216) 195 #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296) 196 #define SET_PR_FPVALID(S,V) \ 197 do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \ 198 while (0) 199 200 #define COMPAT_USE_64BIT_TIME \ 201 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 202 #else 203 typedef struct user_regs_struct32 compat_elf_gregset_t; 204 #endif 205 206 /* 207 * A pointer passed in from user mode. This should not 208 * be used for syscall parameters, just declare them 209 * as pointers because the syscall entry code will have 210 * appropriately converted them already. 211 */ 212 typedef u32 compat_uptr_t; 213 214 static inline void __user *compat_ptr(compat_uptr_t uptr) 215 { 216 return (void __user *)(unsigned long)uptr; 217 } 218 219 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 220 { 221 return (u32)(unsigned long)uptr; 222 } 223 224 static inline void __user *arch_compat_alloc_user_space(long len) 225 { 226 compat_uptr_t sp; 227 228 if (test_thread_flag(TIF_IA32)) { 229 sp = task_pt_regs(current)->sp; 230 } else { 231 /* -128 for the x32 ABI redzone */ 232 sp = this_cpu_read(old_rsp) - 128; 233 } 234 235 return (void __user *)round_down(sp - len, 16); 236 } 237 238 static inline bool is_x32_task(void) 239 { 240 #ifdef CONFIG_X86_X32_ABI 241 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 242 return true; 243 #endif 244 return false; 245 } 246 247 static inline bool is_compat_task(void) 248 { 249 return is_ia32_task() || is_x32_task(); 250 } 251 252 #endif /* _ASM_X86_COMPAT_H */ 253