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 #define F_GETLK64 12 /* using 'struct flock64' */ 77 #define F_SETLK64 13 78 #define F_SETLKW64 14 79 80 struct compat_flock64 { 81 short l_type; 82 short l_whence; 83 compat_loff_t l_start; 84 compat_loff_t l_len; 85 compat_pid_t l_pid; 86 }; 87 88 struct compat_statfs { 89 int f_type; 90 int f_bsize; 91 int f_blocks; 92 int f_bfree; 93 int f_bavail; 94 int f_files; 95 int f_ffree; 96 compat_fsid_t f_fsid; 97 int f_namelen; /* SunOS ignores this field. */ 98 int f_frsize; 99 int f_flags; 100 int f_spare[4]; 101 }; 102 103 #define COMPAT_RLIM_INFINITY 0xffffffff 104 105 #define COMPAT_OFF_T_MAX 0x7fffffff 106 107 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 108 #define COMPAT_MINSIGSTKSZ 2048 109 110 static inline void __user *arch_compat_alloc_user_space(long len) 111 { 112 return (void __user *)compat_user_stack_pointer() - len; 113 } 114 115 struct compat_ipc64_perm { 116 compat_key_t key; 117 __compat_uid32_t uid; 118 __compat_gid32_t gid; 119 __compat_uid32_t cuid; 120 __compat_gid32_t cgid; 121 unsigned short mode; 122 unsigned short __pad1; 123 unsigned short seq; 124 unsigned short __pad2; 125 compat_ulong_t unused1; 126 compat_ulong_t unused2; 127 }; 128 129 struct compat_semid64_ds { 130 struct compat_ipc64_perm sem_perm; 131 compat_ulong_t sem_otime; 132 compat_ulong_t sem_otime_high; 133 compat_ulong_t sem_ctime; 134 compat_ulong_t sem_ctime_high; 135 compat_ulong_t sem_nsems; 136 compat_ulong_t __unused3; 137 compat_ulong_t __unused4; 138 }; 139 140 struct compat_msqid64_ds { 141 struct compat_ipc64_perm msg_perm; 142 compat_ulong_t msg_stime; 143 compat_ulong_t msg_stime_high; 144 compat_ulong_t msg_rtime; 145 compat_ulong_t msg_rtime_high; 146 compat_ulong_t msg_ctime; 147 compat_ulong_t msg_ctime_high; 148 compat_ulong_t msg_cbytes; 149 compat_ulong_t msg_qnum; 150 compat_ulong_t msg_qbytes; 151 compat_pid_t msg_lspid; 152 compat_pid_t msg_lrpid; 153 compat_ulong_t __unused4; 154 compat_ulong_t __unused5; 155 }; 156 157 struct compat_shmid64_ds { 158 struct compat_ipc64_perm shm_perm; 159 compat_size_t shm_segsz; 160 compat_ulong_t shm_atime; 161 compat_ulong_t shm_atime_high; 162 compat_ulong_t shm_dtime; 163 compat_ulong_t shm_dtime_high; 164 compat_ulong_t shm_ctime; 165 compat_ulong_t shm_ctime_high; 166 compat_pid_t shm_cpid; 167 compat_pid_t shm_lpid; 168 compat_ulong_t shm_nattch; 169 compat_ulong_t __unused4; 170 compat_ulong_t __unused5; 171 }; 172 173 static inline int is_compat_task(void) 174 { 175 return test_thread_flag(TIF_32BIT); 176 } 177 178 static inline int is_compat_thread(struct thread_info *thread) 179 { 180 return test_ti_thread_flag(thread, TIF_32BIT); 181 } 182 183 #else /* !CONFIG_COMPAT */ 184 185 static inline int is_compat_thread(struct thread_info *thread) 186 { 187 return 0; 188 } 189 190 #endif /* CONFIG_COMPAT */ 191 #endif /* __ASM_COMPAT_H */ 192