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 __KERNEL__ 8 #ifdef CONFIG_COMPAT 9 10 /* 11 * Architecture specific compatibility types 12 */ 13 #include <linux/types.h> 14 #include <linux/sched.h> 15 #include <linux/sched/task_stack.h> 16 17 #include <asm-generic/compat.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 /* 118 * A pointer passed in from user mode. This should not 119 * be used for syscall parameters, just declare them 120 * as pointers because the syscall entry code will have 121 * appropriately converted them already. 122 */ 123 124 static inline void __user *compat_ptr(compat_uptr_t uptr) 125 { 126 return (void __user *)(unsigned long)uptr; 127 } 128 129 static inline compat_uptr_t ptr_to_compat(void __user *uptr) 130 { 131 return (u32)(unsigned long)uptr; 132 } 133 134 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 135 #define COMPAT_MINSIGSTKSZ 2048 136 137 static inline void __user *arch_compat_alloc_user_space(long len) 138 { 139 return (void __user *)compat_user_stack_pointer() - len; 140 } 141 142 struct compat_ipc64_perm { 143 compat_key_t key; 144 __compat_uid32_t uid; 145 __compat_gid32_t gid; 146 __compat_uid32_t cuid; 147 __compat_gid32_t cgid; 148 unsigned short mode; 149 unsigned short __pad1; 150 unsigned short seq; 151 unsigned short __pad2; 152 compat_ulong_t unused1; 153 compat_ulong_t unused2; 154 }; 155 156 struct compat_semid64_ds { 157 struct compat_ipc64_perm sem_perm; 158 compat_ulong_t sem_otime; 159 compat_ulong_t sem_otime_high; 160 compat_ulong_t sem_ctime; 161 compat_ulong_t sem_ctime_high; 162 compat_ulong_t sem_nsems; 163 compat_ulong_t __unused3; 164 compat_ulong_t __unused4; 165 }; 166 167 struct compat_msqid64_ds { 168 struct compat_ipc64_perm msg_perm; 169 compat_ulong_t msg_stime; 170 compat_ulong_t msg_stime_high; 171 compat_ulong_t msg_rtime; 172 compat_ulong_t msg_rtime_high; 173 compat_ulong_t msg_ctime; 174 compat_ulong_t msg_ctime_high; 175 compat_ulong_t msg_cbytes; 176 compat_ulong_t msg_qnum; 177 compat_ulong_t msg_qbytes; 178 compat_pid_t msg_lspid; 179 compat_pid_t msg_lrpid; 180 compat_ulong_t __unused4; 181 compat_ulong_t __unused5; 182 }; 183 184 struct compat_shmid64_ds { 185 struct compat_ipc64_perm shm_perm; 186 compat_size_t shm_segsz; 187 compat_ulong_t shm_atime; 188 compat_ulong_t shm_atime_high; 189 compat_ulong_t shm_dtime; 190 compat_ulong_t shm_dtime_high; 191 compat_ulong_t shm_ctime; 192 compat_ulong_t shm_ctime_high; 193 compat_pid_t shm_cpid; 194 compat_pid_t shm_lpid; 195 compat_ulong_t shm_nattch; 196 compat_ulong_t __unused4; 197 compat_ulong_t __unused5; 198 }; 199 200 static inline int is_compat_task(void) 201 { 202 return test_thread_flag(TIF_32BIT); 203 } 204 205 static inline int is_compat_thread(struct thread_info *thread) 206 { 207 return test_ti_thread_flag(thread, TIF_32BIT); 208 } 209 210 #else /* !CONFIG_COMPAT */ 211 212 static inline int is_compat_thread(struct thread_info *thread) 213 { 214 return 0; 215 } 216 217 #endif /* CONFIG_COMPAT */ 218 #endif /* __KERNEL__ */ 219 #endif /* __ASM_COMPAT_H */ 220