1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_COMPAT_H 3 #define _ASM_COMPAT_H 4 /* 5 * Architecture specific compatibility types 6 */ 7 #include <linux/thread_info.h> 8 #include <linux/types.h> 9 #include <asm/page.h> 10 #include <asm/ptrace.h> 11 12 #define COMPAT_USER_HZ 100 13 #define COMPAT_UTS_MACHINE "mips\0\0\0" 14 15 typedef u32 compat_size_t; 16 typedef s32 compat_ssize_t; 17 typedef s32 compat_time_t; 18 typedef s32 compat_clock_t; 19 typedef s32 compat_suseconds_t; 20 21 typedef s32 compat_pid_t; 22 typedef s32 __compat_uid_t; 23 typedef s32 __compat_gid_t; 24 typedef __compat_uid_t __compat_uid32_t; 25 typedef __compat_gid_t __compat_gid32_t; 26 typedef u32 compat_mode_t; 27 typedef u32 compat_ino_t; 28 typedef u32 compat_dev_t; 29 typedef s32 compat_off_t; 30 typedef s64 compat_loff_t; 31 typedef u32 compat_nlink_t; 32 typedef s32 compat_ipc_pid_t; 33 typedef s32 compat_daddr_t; 34 typedef s32 compat_caddr_t; 35 typedef struct { 36 s32 val[2]; 37 } compat_fsid_t; 38 typedef s32 compat_timer_t; 39 typedef s32 compat_key_t; 40 41 typedef s32 compat_int_t; 42 typedef s32 compat_long_t; 43 typedef s64 compat_s64; 44 typedef u32 compat_uint_t; 45 typedef u32 compat_ulong_t; 46 typedef u64 compat_u64; 47 typedef u32 compat_uptr_t; 48 49 struct compat_timespec { 50 compat_time_t tv_sec; 51 s32 tv_nsec; 52 }; 53 54 struct compat_timeval { 55 compat_time_t tv_sec; 56 s32 tv_usec; 57 }; 58 59 struct compat_stat { 60 compat_dev_t st_dev; 61 s32 st_pad1[3]; 62 compat_ino_t st_ino; 63 compat_mode_t st_mode; 64 compat_nlink_t st_nlink; 65 __compat_uid_t st_uid; 66 __compat_gid_t st_gid; 67 compat_dev_t st_rdev; 68 s32 st_pad2[2]; 69 compat_off_t st_size; 70 s32 st_pad3; 71 compat_time_t st_atime; 72 s32 st_atime_nsec; 73 compat_time_t st_mtime; 74 s32 st_mtime_nsec; 75 compat_time_t st_ctime; 76 s32 st_ctime_nsec; 77 s32 st_blksize; 78 s32 st_blocks; 79 s32 st_pad4[14]; 80 }; 81 82 struct compat_flock { 83 short l_type; 84 short l_whence; 85 compat_off_t l_start; 86 compat_off_t l_len; 87 s32 l_sysid; 88 compat_pid_t l_pid; 89 s32 pad[4]; 90 }; 91 92 #define F_GETLK64 33 93 #define F_SETLK64 34 94 #define F_SETLKW64 35 95 96 struct compat_flock64 { 97 short l_type; 98 short l_whence; 99 compat_loff_t l_start; 100 compat_loff_t l_len; 101 compat_pid_t l_pid; 102 }; 103 104 struct compat_statfs { 105 int f_type; 106 int f_bsize; 107 int f_frsize; 108 int f_blocks; 109 int f_bfree; 110 int f_files; 111 int f_ffree; 112 int f_bavail; 113 compat_fsid_t f_fsid; 114 int f_namelen; 115 int f_flags; 116 int f_spare[5]; 117 }; 118 119 #define COMPAT_RLIM_INFINITY 0x7fffffffUL 120 121 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 122 123 #define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */ 124 #define _COMPAT_NSIG_BPW 32 125 126 typedef u32 compat_sigset_word; 127 128 #define COMPAT_OFF_T_MAX 0x7fffffff 129 130 /* 131 * A pointer passed in from user mode. This should not 132 * be used for syscall parameters, just declare them 133 * as pointers because the syscall entry code will have 134 * appropriately converted them already. 135 */ 136 137 static inline void __user *compat_ptr(compat_uptr_t uptr) 138 { 139 /* cast to a __user pointer via "unsigned long" makes sparse happy */ 140 return (void __user *)(unsigned long)(long)uptr; 141 } 142 143 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 144 { 145 return (u32)(unsigned long)uptr; 146 } 147 148 static inline void __user *arch_compat_alloc_user_space(long len) 149 { 150 struct pt_regs *regs = (struct pt_regs *) 151 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1; 152 153 return (void __user *) (regs->regs[29] - len); 154 } 155 156 struct compat_ipc64_perm { 157 compat_key_t key; 158 __compat_uid32_t uid; 159 __compat_gid32_t gid; 160 __compat_uid32_t cuid; 161 __compat_gid32_t cgid; 162 compat_mode_t mode; 163 unsigned short seq; 164 unsigned short __pad2; 165 compat_ulong_t __unused1; 166 compat_ulong_t __unused2; 167 }; 168 169 struct compat_semid64_ds { 170 struct compat_ipc64_perm sem_perm; 171 compat_time_t sem_otime; 172 compat_time_t sem_ctime; 173 compat_ulong_t sem_nsems; 174 compat_ulong_t __unused1; 175 compat_ulong_t __unused2; 176 }; 177 178 struct compat_msqid64_ds { 179 struct compat_ipc64_perm msg_perm; 180 #ifndef CONFIG_CPU_LITTLE_ENDIAN 181 compat_ulong_t __unused1; 182 #endif 183 compat_time_t msg_stime; 184 #ifdef CONFIG_CPU_LITTLE_ENDIAN 185 compat_ulong_t __unused1; 186 #endif 187 #ifndef CONFIG_CPU_LITTLE_ENDIAN 188 compat_ulong_t __unused2; 189 #endif 190 compat_time_t msg_rtime; 191 #ifdef CONFIG_CPU_LITTLE_ENDIAN 192 compat_ulong_t __unused2; 193 #endif 194 #ifndef CONFIG_CPU_LITTLE_ENDIAN 195 compat_ulong_t __unused3; 196 #endif 197 compat_time_t msg_ctime; 198 #ifdef CONFIG_CPU_LITTLE_ENDIAN 199 compat_ulong_t __unused3; 200 #endif 201 compat_ulong_t msg_cbytes; 202 compat_ulong_t msg_qnum; 203 compat_ulong_t msg_qbytes; 204 compat_pid_t msg_lspid; 205 compat_pid_t msg_lrpid; 206 compat_ulong_t __unused4; 207 compat_ulong_t __unused5; 208 }; 209 210 struct compat_shmid64_ds { 211 struct compat_ipc64_perm shm_perm; 212 compat_size_t shm_segsz; 213 compat_time_t shm_atime; 214 compat_time_t shm_dtime; 215 compat_time_t shm_ctime; 216 compat_pid_t shm_cpid; 217 compat_pid_t shm_lpid; 218 compat_ulong_t shm_nattch; 219 compat_ulong_t __unused1; 220 compat_ulong_t __unused2; 221 }; 222 223 /* MIPS has unusual order of fields in stack_t */ 224 typedef struct compat_sigaltstack { 225 compat_uptr_t ss_sp; 226 compat_size_t ss_size; 227 int ss_flags; 228 } compat_stack_t; 229 #define compat_sigaltstack compat_sigaltstack 230 231 static inline int is_compat_task(void) 232 { 233 return test_thread_flag(TIF_32BIT_ADDR); 234 } 235 236 #endif /* _ASM_COMPAT_H */ 237