1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 ARM Ltd. 4 */ 5 #ifndef __ASM_COMPAT_H 6 #define __ASM_COMPAT_H 7 8 #define compat_mode_t compat_mode_t 9 typedef u16 compat_mode_t; 10 11 #include <asm-generic/compat.h> 12 13 #ifdef CONFIG_COMPAT 14 15 /* 16 * Architecture specific compatibility types 17 */ 18 #include <linux/types.h> 19 #include <linux/sched.h> 20 #include <linux/sched/task_stack.h> 21 22 #define COMPAT_USER_HZ 100 23 #ifdef __AARCH64EB__ 24 #define COMPAT_UTS_MACHINE "armv8b\0\0" 25 #else 26 #define COMPAT_UTS_MACHINE "armv8l\0\0" 27 #endif 28 29 typedef u16 __compat_uid_t; 30 typedef u16 __compat_gid_t; 31 typedef u16 __compat_uid16_t; 32 typedef u16 __compat_gid16_t; 33 typedef u32 compat_dev_t; 34 typedef s32 compat_nlink_t; 35 typedef u16 compat_ipc_pid_t; 36 typedef __kernel_fsid_t compat_fsid_t; 37 38 struct compat_stat { 39 #ifdef __AARCH64EB__ 40 short st_dev; 41 short __pad1; 42 #else 43 compat_dev_t st_dev; 44 #endif 45 compat_ino_t st_ino; 46 compat_mode_t st_mode; 47 compat_ushort_t st_nlink; 48 __compat_uid16_t st_uid; 49 __compat_gid16_t st_gid; 50 #ifdef __AARCH64EB__ 51 short st_rdev; 52 short __pad2; 53 #else 54 compat_dev_t st_rdev; 55 #endif 56 compat_off_t st_size; 57 compat_off_t st_blksize; 58 compat_off_t st_blocks; 59 old_time32_t st_atime; 60 compat_ulong_t st_atime_nsec; 61 old_time32_t st_mtime; 62 compat_ulong_t st_mtime_nsec; 63 old_time32_t st_ctime; 64 compat_ulong_t st_ctime_nsec; 65 compat_ulong_t __unused4[2]; 66 }; 67 68 struct compat_flock { 69 short l_type; 70 short l_whence; 71 compat_off_t l_start; 72 compat_off_t l_len; 73 compat_pid_t l_pid; 74 }; 75 76 struct compat_flock64 { 77 short l_type; 78 short l_whence; 79 compat_loff_t l_start; 80 compat_loff_t l_len; 81 compat_pid_t l_pid; 82 }; 83 84 struct compat_statfs { 85 int f_type; 86 int f_bsize; 87 int f_blocks; 88 int f_bfree; 89 int f_bavail; 90 int f_files; 91 int f_ffree; 92 compat_fsid_t f_fsid; 93 int f_namelen; /* SunOS ignores this field. */ 94 int f_frsize; 95 int f_flags; 96 int f_spare[4]; 97 }; 98 99 #define COMPAT_RLIM_INFINITY 0xffffffff 100 101 #define COMPAT_OFF_T_MAX 0x7fffffff 102 103 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 104 #define COMPAT_MINSIGSTKSZ 2048 105 106 struct compat_ipc64_perm { 107 compat_key_t key; 108 __compat_uid32_t uid; 109 __compat_gid32_t gid; 110 __compat_uid32_t cuid; 111 __compat_gid32_t cgid; 112 unsigned short mode; 113 unsigned short __pad1; 114 unsigned short seq; 115 unsigned short __pad2; 116 compat_ulong_t unused1; 117 compat_ulong_t unused2; 118 }; 119 120 struct compat_semid64_ds { 121 struct compat_ipc64_perm sem_perm; 122 compat_ulong_t sem_otime; 123 compat_ulong_t sem_otime_high; 124 compat_ulong_t sem_ctime; 125 compat_ulong_t sem_ctime_high; 126 compat_ulong_t sem_nsems; 127 compat_ulong_t __unused3; 128 compat_ulong_t __unused4; 129 }; 130 131 struct compat_msqid64_ds { 132 struct compat_ipc64_perm msg_perm; 133 compat_ulong_t msg_stime; 134 compat_ulong_t msg_stime_high; 135 compat_ulong_t msg_rtime; 136 compat_ulong_t msg_rtime_high; 137 compat_ulong_t msg_ctime; 138 compat_ulong_t msg_ctime_high; 139 compat_ulong_t msg_cbytes; 140 compat_ulong_t msg_qnum; 141 compat_ulong_t msg_qbytes; 142 compat_pid_t msg_lspid; 143 compat_pid_t msg_lrpid; 144 compat_ulong_t __unused4; 145 compat_ulong_t __unused5; 146 }; 147 148 struct compat_shmid64_ds { 149 struct compat_ipc64_perm shm_perm; 150 compat_size_t shm_segsz; 151 compat_ulong_t shm_atime; 152 compat_ulong_t shm_atime_high; 153 compat_ulong_t shm_dtime; 154 compat_ulong_t shm_dtime_high; 155 compat_ulong_t shm_ctime; 156 compat_ulong_t shm_ctime_high; 157 compat_pid_t shm_cpid; 158 compat_pid_t shm_lpid; 159 compat_ulong_t shm_nattch; 160 compat_ulong_t __unused4; 161 compat_ulong_t __unused5; 162 }; 163 164 static inline int is_compat_task(void) 165 { 166 return test_thread_flag(TIF_32BIT); 167 } 168 169 static inline int is_compat_thread(struct thread_info *thread) 170 { 171 return test_ti_thread_flag(thread, TIF_32BIT); 172 } 173 174 #else /* !CONFIG_COMPAT */ 175 176 static inline int is_compat_thread(struct thread_info *thread) 177 { 178 return 0; 179 } 180 181 #endif /* CONFIG_COMPAT */ 182 #endif /* __ASM_COMPAT_H */ 183