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 typedef s64 compat_s64; 39 typedef u64 compat_u64; 40 41 struct compat_stat { 42 #ifdef __AARCH64EB__ 43 short st_dev; 44 short __pad1; 45 #else 46 compat_dev_t st_dev; 47 #endif 48 compat_ino_t st_ino; 49 compat_mode_t st_mode; 50 compat_ushort_t st_nlink; 51 __compat_uid16_t st_uid; 52 __compat_gid16_t st_gid; 53 #ifdef __AARCH64EB__ 54 short st_rdev; 55 short __pad2; 56 #else 57 compat_dev_t st_rdev; 58 #endif 59 compat_off_t st_size; 60 compat_off_t st_blksize; 61 compat_off_t st_blocks; 62 old_time32_t st_atime; 63 compat_ulong_t st_atime_nsec; 64 old_time32_t st_mtime; 65 compat_ulong_t st_mtime_nsec; 66 old_time32_t st_ctime; 67 compat_ulong_t st_ctime_nsec; 68 compat_ulong_t __unused4[2]; 69 }; 70 71 struct compat_flock { 72 short l_type; 73 short l_whence; 74 compat_off_t l_start; 75 compat_off_t l_len; 76 compat_pid_t l_pid; 77 }; 78 79 #define F_GETLK64 12 /* using 'struct flock64' */ 80 #define F_SETLK64 13 81 #define F_SETLKW64 14 82 83 struct compat_flock64 { 84 short l_type; 85 short l_whence; 86 compat_loff_t l_start; 87 compat_loff_t l_len; 88 compat_pid_t l_pid; 89 }; 90 91 struct compat_statfs { 92 int f_type; 93 int f_bsize; 94 int f_blocks; 95 int f_bfree; 96 int f_bavail; 97 int f_files; 98 int f_ffree; 99 compat_fsid_t f_fsid; 100 int f_namelen; /* SunOS ignores this field. */ 101 int f_frsize; 102 int f_flags; 103 int f_spare[4]; 104 }; 105 106 #define COMPAT_RLIM_INFINITY 0xffffffff 107 108 typedef u32 compat_old_sigset_t; 109 110 #define _COMPAT_NSIG 64 111 #define _COMPAT_NSIG_BPW 32 112 113 typedef u32 compat_sigset_word; 114 115 #define COMPAT_OFF_T_MAX 0x7fffffff 116 117 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 118 #define COMPAT_MINSIGSTKSZ 2048 119 120 static inline void __user *arch_compat_alloc_user_space(long len) 121 { 122 return (void __user *)compat_user_stack_pointer() - len; 123 } 124 125 struct compat_ipc64_perm { 126 compat_key_t key; 127 __compat_uid32_t uid; 128 __compat_gid32_t gid; 129 __compat_uid32_t cuid; 130 __compat_gid32_t cgid; 131 unsigned short mode; 132 unsigned short __pad1; 133 unsigned short seq; 134 unsigned short __pad2; 135 compat_ulong_t unused1; 136 compat_ulong_t unused2; 137 }; 138 139 struct compat_semid64_ds { 140 struct compat_ipc64_perm sem_perm; 141 compat_ulong_t sem_otime; 142 compat_ulong_t sem_otime_high; 143 compat_ulong_t sem_ctime; 144 compat_ulong_t sem_ctime_high; 145 compat_ulong_t sem_nsems; 146 compat_ulong_t __unused3; 147 compat_ulong_t __unused4; 148 }; 149 150 struct compat_msqid64_ds { 151 struct compat_ipc64_perm msg_perm; 152 compat_ulong_t msg_stime; 153 compat_ulong_t msg_stime_high; 154 compat_ulong_t msg_rtime; 155 compat_ulong_t msg_rtime_high; 156 compat_ulong_t msg_ctime; 157 compat_ulong_t msg_ctime_high; 158 compat_ulong_t msg_cbytes; 159 compat_ulong_t msg_qnum; 160 compat_ulong_t msg_qbytes; 161 compat_pid_t msg_lspid; 162 compat_pid_t msg_lrpid; 163 compat_ulong_t __unused4; 164 compat_ulong_t __unused5; 165 }; 166 167 struct compat_shmid64_ds { 168 struct compat_ipc64_perm shm_perm; 169 compat_size_t shm_segsz; 170 compat_ulong_t shm_atime; 171 compat_ulong_t shm_atime_high; 172 compat_ulong_t shm_dtime; 173 compat_ulong_t shm_dtime_high; 174 compat_ulong_t shm_ctime; 175 compat_ulong_t shm_ctime_high; 176 compat_pid_t shm_cpid; 177 compat_pid_t shm_lpid; 178 compat_ulong_t shm_nattch; 179 compat_ulong_t __unused4; 180 compat_ulong_t __unused5; 181 }; 182 183 static inline int is_compat_task(void) 184 { 185 return test_thread_flag(TIF_32BIT); 186 } 187 188 static inline int is_compat_thread(struct thread_info *thread) 189 { 190 return test_ti_thread_flag(thread, TIF_32BIT); 191 } 192 193 #else /* !CONFIG_COMPAT */ 194 195 static inline int is_compat_thread(struct thread_info *thread) 196 { 197 return 0; 198 } 199 200 #endif /* CONFIG_COMPAT */ 201 #endif /* __ASM_COMPAT_H */ 202