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 #ifdef CONFIG_COMPAT 8 9 /* 10 * Architecture specific compatibility types 11 */ 12 #include <linux/types.h> 13 #include <linux/sched.h> 14 #include <linux/sched/task_stack.h> 15 16 #include <asm-generic/compat.h> 17 18 #define COMPAT_USER_HZ 100 19 #ifdef __AARCH64EB__ 20 #define COMPAT_UTS_MACHINE "armv8b\0\0" 21 #else 22 #define COMPAT_UTS_MACHINE "armv8l\0\0" 23 #endif 24 25 typedef u16 __compat_uid_t; 26 typedef u16 __compat_gid_t; 27 typedef u16 __compat_uid16_t; 28 typedef u16 __compat_gid16_t; 29 typedef u32 __compat_uid32_t; 30 typedef u32 __compat_gid32_t; 31 typedef u16 compat_mode_t; 32 typedef u32 compat_dev_t; 33 typedef s32 compat_nlink_t; 34 typedef u16 compat_ipc_pid_t; 35 typedef u32 compat_caddr_t; 36 typedef __kernel_fsid_t compat_fsid_t; 37 typedef s64 compat_s64; 38 typedef u64 compat_u64; 39 40 struct compat_stat { 41 #ifdef __AARCH64EB__ 42 short st_dev; 43 short __pad1; 44 #else 45 compat_dev_t st_dev; 46 #endif 47 compat_ino_t st_ino; 48 compat_mode_t st_mode; 49 compat_ushort_t st_nlink; 50 __compat_uid16_t st_uid; 51 __compat_gid16_t st_gid; 52 #ifdef __AARCH64EB__ 53 short st_rdev; 54 short __pad2; 55 #else 56 compat_dev_t st_rdev; 57 #endif 58 compat_off_t st_size; 59 compat_off_t st_blksize; 60 compat_off_t st_blocks; 61 old_time32_t st_atime; 62 compat_ulong_t st_atime_nsec; 63 old_time32_t st_mtime; 64 compat_ulong_t st_mtime_nsec; 65 old_time32_t st_ctime; 66 compat_ulong_t st_ctime_nsec; 67 compat_ulong_t __unused4[2]; 68 }; 69 70 struct compat_flock { 71 short l_type; 72 short l_whence; 73 compat_off_t l_start; 74 compat_off_t l_len; 75 compat_pid_t l_pid; 76 }; 77 78 #define F_GETLK64 12 /* using 'struct flock64' */ 79 #define F_SETLK64 13 80 #define F_SETLKW64 14 81 82 struct compat_flock64 { 83 short l_type; 84 short l_whence; 85 compat_loff_t l_start; 86 compat_loff_t l_len; 87 compat_pid_t l_pid; 88 }; 89 90 struct compat_statfs { 91 int f_type; 92 int f_bsize; 93 int f_blocks; 94 int f_bfree; 95 int f_bavail; 96 int f_files; 97 int f_ffree; 98 compat_fsid_t f_fsid; 99 int f_namelen; /* SunOS ignores this field. */ 100 int f_frsize; 101 int f_flags; 102 int f_spare[4]; 103 }; 104 105 #define COMPAT_RLIM_INFINITY 0xffffffff 106 107 typedef u32 compat_old_sigset_t; 108 109 #define _COMPAT_NSIG 64 110 #define _COMPAT_NSIG_BPW 32 111 112 typedef u32 compat_sigset_word; 113 114 #define COMPAT_OFF_T_MAX 0x7fffffff 115 116 /* 117 * A pointer passed in from user mode. This should not 118 * be used for syscall parameters, just declare them 119 * as pointers because the syscall entry code will have 120 * appropriately converted them already. 121 */ 122 123 static inline void __user *compat_ptr(compat_uptr_t uptr) 124 { 125 return (void __user *)(unsigned long)uptr; 126 } 127 128 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 129 { 130 return (u32)(unsigned long)uptr; 131 } 132 133 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 134 #define COMPAT_MINSIGSTKSZ 2048 135 136 static inline void __user *arch_compat_alloc_user_space(long len) 137 { 138 return (void __user *)compat_user_stack_pointer() - len; 139 } 140 141 struct compat_ipc64_perm { 142 compat_key_t key; 143 __compat_uid32_t uid; 144 __compat_gid32_t gid; 145 __compat_uid32_t cuid; 146 __compat_gid32_t cgid; 147 unsigned short mode; 148 unsigned short __pad1; 149 unsigned short seq; 150 unsigned short __pad2; 151 compat_ulong_t unused1; 152 compat_ulong_t unused2; 153 }; 154 155 struct compat_semid64_ds { 156 struct compat_ipc64_perm sem_perm; 157 compat_ulong_t sem_otime; 158 compat_ulong_t sem_otime_high; 159 compat_ulong_t sem_ctime; 160 compat_ulong_t sem_ctime_high; 161 compat_ulong_t sem_nsems; 162 compat_ulong_t __unused3; 163 compat_ulong_t __unused4; 164 }; 165 166 struct compat_msqid64_ds { 167 struct compat_ipc64_perm msg_perm; 168 compat_ulong_t msg_stime; 169 compat_ulong_t msg_stime_high; 170 compat_ulong_t msg_rtime; 171 compat_ulong_t msg_rtime_high; 172 compat_ulong_t msg_ctime; 173 compat_ulong_t msg_ctime_high; 174 compat_ulong_t msg_cbytes; 175 compat_ulong_t msg_qnum; 176 compat_ulong_t msg_qbytes; 177 compat_pid_t msg_lspid; 178 compat_pid_t msg_lrpid; 179 compat_ulong_t __unused4; 180 compat_ulong_t __unused5; 181 }; 182 183 struct compat_shmid64_ds { 184 struct compat_ipc64_perm shm_perm; 185 compat_size_t shm_segsz; 186 compat_ulong_t shm_atime; 187 compat_ulong_t shm_atime_high; 188 compat_ulong_t shm_dtime; 189 compat_ulong_t shm_dtime_high; 190 compat_ulong_t shm_ctime; 191 compat_ulong_t shm_ctime_high; 192 compat_pid_t shm_cpid; 193 compat_pid_t shm_lpid; 194 compat_ulong_t shm_nattch; 195 compat_ulong_t __unused4; 196 compat_ulong_t __unused5; 197 }; 198 199 static inline int is_compat_task(void) 200 { 201 return test_thread_flag(TIF_32BIT); 202 } 203 204 static inline int is_compat_thread(struct thread_info *thread) 205 { 206 return test_ti_thread_flag(thread, TIF_32BIT); 207 } 208 209 #else /* !CONFIG_COMPAT */ 210 211 static inline int is_compat_thread(struct thread_info *thread) 212 { 213 return 0; 214 } 215 216 #endif /* CONFIG_COMPAT */ 217 #endif /* __ASM_COMPAT_H */ 218