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 #include <asm-generic/compat.h> 9 10 #ifdef CONFIG_COMPAT 11 12 /* 13 * Architecture specific compatibility types 14 */ 15 #include <linux/types.h> 16 #include <linux/sched.h> 17 #include <linux/sched/task_stack.h> 18 19 #define COMPAT_USER_HZ 100 20 #ifdef __AARCH64EB__ 21 #define COMPAT_UTS_MACHINE "armv8b\0\0" 22 #else 23 #define COMPAT_UTS_MACHINE "armv8l\0\0" 24 #endif 25 26 typedef u16 __compat_uid_t; 27 typedef u16 __compat_gid_t; 28 typedef u16 __compat_uid16_t; 29 typedef u16 __compat_gid16_t; 30 typedef u32 __compat_uid32_t; 31 typedef u32 __compat_gid32_t; 32 typedef u16 compat_mode_t; 33 typedef u32 compat_dev_t; 34 typedef s32 compat_nlink_t; 35 typedef u16 compat_ipc_pid_t; 36 typedef u32 compat_caddr_t; 37 typedef __kernel_fsid_t compat_fsid_t; 38 39 struct compat_stat { 40 #ifdef __AARCH64EB__ 41 short st_dev; 42 short __pad1; 43 #else 44 compat_dev_t st_dev; 45 #endif 46 compat_ino_t st_ino; 47 compat_mode_t st_mode; 48 compat_ushort_t st_nlink; 49 __compat_uid16_t st_uid; 50 __compat_gid16_t st_gid; 51 #ifdef __AARCH64EB__ 52 short st_rdev; 53 short __pad2; 54 #else 55 compat_dev_t st_rdev; 56 #endif 57 compat_off_t st_size; 58 compat_off_t st_blksize; 59 compat_off_t st_blocks; 60 old_time32_t st_atime; 61 compat_ulong_t st_atime_nsec; 62 old_time32_t st_mtime; 63 compat_ulong_t st_mtime_nsec; 64 old_time32_t st_ctime; 65 compat_ulong_t st_ctime_nsec; 66 compat_ulong_t __unused4[2]; 67 }; 68 69 struct compat_flock { 70 short l_type; 71 short l_whence; 72 compat_off_t l_start; 73 compat_off_t l_len; 74 compat_pid_t l_pid; 75 }; 76 77 #define F_GETLK64 12 /* using 'struct flock64' */ 78 #define F_SETLK64 13 79 #define F_SETLKW64 14 80 81 struct compat_flock64 { 82 short l_type; 83 short l_whence; 84 compat_loff_t l_start; 85 compat_loff_t l_len; 86 compat_pid_t l_pid; 87 }; 88 89 struct compat_statfs { 90 int f_type; 91 int f_bsize; 92 int f_blocks; 93 int f_bfree; 94 int f_bavail; 95 int f_files; 96 int f_ffree; 97 compat_fsid_t f_fsid; 98 int f_namelen; /* SunOS ignores this field. */ 99 int f_frsize; 100 int f_flags; 101 int f_spare[4]; 102 }; 103 104 #define COMPAT_RLIM_INFINITY 0xffffffff 105 106 typedef u32 compat_old_sigset_t; 107 108 #define _COMPAT_NSIG 64 109 #define _COMPAT_NSIG_BPW 32 110 111 typedef u32 compat_sigset_word; 112 113 #define COMPAT_OFF_T_MAX 0x7fffffff 114 115 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 116 #define COMPAT_MINSIGSTKSZ 2048 117 118 static inline void __user *arch_compat_alloc_user_space(long len) 119 { 120 return (void __user *)compat_user_stack_pointer() - len; 121 } 122 123 struct compat_ipc64_perm { 124 compat_key_t key; 125 __compat_uid32_t uid; 126 __compat_gid32_t gid; 127 __compat_uid32_t cuid; 128 __compat_gid32_t cgid; 129 unsigned short mode; 130 unsigned short __pad1; 131 unsigned short seq; 132 unsigned short __pad2; 133 compat_ulong_t unused1; 134 compat_ulong_t unused2; 135 }; 136 137 struct compat_semid64_ds { 138 struct compat_ipc64_perm sem_perm; 139 compat_ulong_t sem_otime; 140 compat_ulong_t sem_otime_high; 141 compat_ulong_t sem_ctime; 142 compat_ulong_t sem_ctime_high; 143 compat_ulong_t sem_nsems; 144 compat_ulong_t __unused3; 145 compat_ulong_t __unused4; 146 }; 147 148 struct compat_msqid64_ds { 149 struct compat_ipc64_perm msg_perm; 150 compat_ulong_t msg_stime; 151 compat_ulong_t msg_stime_high; 152 compat_ulong_t msg_rtime; 153 compat_ulong_t msg_rtime_high; 154 compat_ulong_t msg_ctime; 155 compat_ulong_t msg_ctime_high; 156 compat_ulong_t msg_cbytes; 157 compat_ulong_t msg_qnum; 158 compat_ulong_t msg_qbytes; 159 compat_pid_t msg_lspid; 160 compat_pid_t msg_lrpid; 161 compat_ulong_t __unused4; 162 compat_ulong_t __unused5; 163 }; 164 165 struct compat_shmid64_ds { 166 struct compat_ipc64_perm shm_perm; 167 compat_size_t shm_segsz; 168 compat_ulong_t shm_atime; 169 compat_ulong_t shm_atime_high; 170 compat_ulong_t shm_dtime; 171 compat_ulong_t shm_dtime_high; 172 compat_ulong_t shm_ctime; 173 compat_ulong_t shm_ctime_high; 174 compat_pid_t shm_cpid; 175 compat_pid_t shm_lpid; 176 compat_ulong_t shm_nattch; 177 compat_ulong_t __unused4; 178 compat_ulong_t __unused5; 179 }; 180 181 static inline int is_compat_task(void) 182 { 183 return test_thread_flag(TIF_32BIT); 184 } 185 186 static inline int is_compat_thread(struct thread_info *thread) 187 { 188 return test_ti_thread_flag(thread, TIF_32BIT); 189 } 190 191 #else /* !CONFIG_COMPAT */ 192 193 static inline int is_compat_thread(struct thread_info *thread) 194 { 195 return 0; 196 } 197 198 #endif /* CONFIG_COMPAT */ 199 #endif /* __ASM_COMPAT_H */ 200