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_clock_t; 18 typedef s32 compat_suseconds_t; 19 20 typedef s32 compat_pid_t; 21 typedef s32 __compat_uid_t; 22 typedef s32 __compat_gid_t; 23 typedef __compat_uid_t __compat_uid32_t; 24 typedef __compat_gid_t __compat_gid32_t; 25 typedef u32 compat_mode_t; 26 typedef u32 compat_ino_t; 27 typedef u32 compat_dev_t; 28 typedef s32 compat_off_t; 29 typedef s64 compat_loff_t; 30 typedef u32 compat_nlink_t; 31 typedef s32 compat_ipc_pid_t; 32 typedef s32 compat_daddr_t; 33 typedef s32 compat_caddr_t; 34 typedef struct { 35 s32 val[2]; 36 } compat_fsid_t; 37 typedef s32 compat_timer_t; 38 typedef s32 compat_key_t; 39 40 typedef s16 compat_short_t; 41 typedef s32 compat_int_t; 42 typedef s32 compat_long_t; 43 typedef s64 compat_s64; 44 typedef u16 compat_ushort_t; 45 typedef u32 compat_uint_t; 46 typedef u32 compat_ulong_t; 47 typedef u64 compat_u64; 48 typedef u32 compat_uptr_t; 49 50 struct compat_stat { 51 compat_dev_t st_dev; 52 s32 st_pad1[3]; 53 compat_ino_t st_ino; 54 compat_mode_t st_mode; 55 compat_nlink_t st_nlink; 56 __compat_uid_t st_uid; 57 __compat_gid_t st_gid; 58 compat_dev_t st_rdev; 59 s32 st_pad2[2]; 60 compat_off_t st_size; 61 s32 st_pad3; 62 compat_time_t st_atime; 63 s32 st_atime_nsec; 64 compat_time_t st_mtime; 65 s32 st_mtime_nsec; 66 compat_time_t st_ctime; 67 s32 st_ctime_nsec; 68 s32 st_blksize; 69 s32 st_blocks; 70 s32 st_pad4[14]; 71 }; 72 73 struct compat_flock { 74 short l_type; 75 short l_whence; 76 compat_off_t l_start; 77 compat_off_t l_len; 78 s32 l_sysid; 79 compat_pid_t l_pid; 80 s32 pad[4]; 81 }; 82 83 #define F_GETLK64 33 84 #define F_SETLK64 34 85 #define F_SETLKW64 35 86 87 struct compat_flock64 { 88 short l_type; 89 short l_whence; 90 compat_loff_t l_start; 91 compat_loff_t l_len; 92 compat_pid_t l_pid; 93 }; 94 95 struct compat_statfs { 96 int f_type; 97 int f_bsize; 98 int f_frsize; 99 int f_blocks; 100 int f_bfree; 101 int f_files; 102 int f_ffree; 103 int f_bavail; 104 compat_fsid_t f_fsid; 105 int f_namelen; 106 int f_flags; 107 int f_spare[5]; 108 }; 109 110 #define COMPAT_RLIM_INFINITY 0x7fffffffUL 111 112 typedef u32 compat_old_sigset_t; /* at least 32 bits */ 113 114 #define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */ 115 #define _COMPAT_NSIG_BPW 32 116 117 typedef u32 compat_sigset_word; 118 119 #define COMPAT_OFF_T_MAX 0x7fffffff 120 121 /* 122 * A pointer passed in from user mode. This should not 123 * be used for syscall parameters, just declare them 124 * as pointers because the syscall entry code will have 125 * appropriately converted them already. 126 */ 127 128 static inline void __user *compat_ptr(compat_uptr_t uptr) 129 { 130 /* cast to a __user pointer via "unsigned long" makes sparse happy */ 131 return (void __user *)(unsigned long)(long)uptr; 132 } 133 134 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 135 { 136 return (u32)(unsigned long)uptr; 137 } 138 139 static inline void __user *arch_compat_alloc_user_space(long len) 140 { 141 struct pt_regs *regs = (struct pt_regs *) 142 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1; 143 144 return (void __user *) (regs->regs[29] - len); 145 } 146 147 struct compat_ipc64_perm { 148 compat_key_t key; 149 __compat_uid32_t uid; 150 __compat_gid32_t gid; 151 __compat_uid32_t cuid; 152 __compat_gid32_t cgid; 153 compat_mode_t mode; 154 unsigned short seq; 155 unsigned short __pad2; 156 compat_ulong_t __unused1; 157 compat_ulong_t __unused2; 158 }; 159 160 struct compat_semid64_ds { 161 struct compat_ipc64_perm sem_perm; 162 compat_ulong_t sem_otime; 163 compat_ulong_t sem_ctime; 164 compat_ulong_t sem_nsems; 165 compat_ulong_t sem_otime_high; 166 compat_ulong_t sem_ctime_high; 167 }; 168 169 struct compat_msqid64_ds { 170 struct compat_ipc64_perm msg_perm; 171 #ifndef CONFIG_CPU_LITTLE_ENDIAN 172 compat_ulong_t msg_stime_high; 173 #endif 174 compat_ulong_t msg_stime; 175 #ifdef CONFIG_CPU_LITTLE_ENDIAN 176 compat_ulong_t msg_stime_high; 177 #endif 178 #ifndef CONFIG_CPU_LITTLE_ENDIAN 179 compat_ulong_t msg_rtime_high; 180 #endif 181 compat_ulong_t msg_rtime; 182 #ifdef CONFIG_CPU_LITTLE_ENDIAN 183 compat_ulong_t msg_rtime_high; 184 #endif 185 #ifndef CONFIG_CPU_LITTLE_ENDIAN 186 compat_ulong_t msg_ctime_high; 187 #endif 188 compat_ulong_t msg_ctime; 189 #ifdef CONFIG_CPU_LITTLE_ENDIAN 190 compat_ulong_t msg_ctime_high; 191 #endif 192 compat_ulong_t msg_cbytes; 193 compat_ulong_t msg_qnum; 194 compat_ulong_t msg_qbytes; 195 compat_pid_t msg_lspid; 196 compat_pid_t msg_lrpid; 197 compat_ulong_t __unused4; 198 compat_ulong_t __unused5; 199 }; 200 201 struct compat_shmid64_ds { 202 struct compat_ipc64_perm shm_perm; 203 compat_size_t shm_segsz; 204 compat_ulong_t shm_atime; 205 compat_ulong_t shm_dtime; 206 compat_ulong_t shm_ctime; 207 compat_pid_t shm_cpid; 208 compat_pid_t shm_lpid; 209 compat_ulong_t shm_nattch; 210 compat_ushort_t shm_atime_high; 211 compat_ushort_t shm_dtime_high; 212 compat_ushort_t shm_ctime_high; 213 compat_ushort_t __unused2; 214 }; 215 216 /* MIPS has unusual order of fields in stack_t */ 217 typedef struct compat_sigaltstack { 218 compat_uptr_t ss_sp; 219 compat_size_t ss_size; 220 int ss_flags; 221 } compat_stack_t; 222 #define compat_sigaltstack compat_sigaltstack 223 224 static inline int is_compat_task(void) 225 { 226 return test_thread_flag(TIF_32BIT_ADDR); 227 } 228 229 #endif /* _ASM_COMPAT_H */ 230