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_statfs { 69 int f_type; 70 int f_bsize; 71 int f_blocks; 72 int f_bfree; 73 int f_bavail; 74 int f_files; 75 int f_ffree; 76 compat_fsid_t f_fsid; 77 int f_namelen; /* SunOS ignores this field. */ 78 int f_frsize; 79 int f_flags; 80 int f_spare[4]; 81 }; 82 83 #define COMPAT_RLIM_INFINITY 0xffffffff 84 85 #define COMPAT_OFF_T_MAX 0x7fffffff 86 87 #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) 88 #define COMPAT_MINSIGSTKSZ 2048 89 90 struct compat_ipc64_perm { 91 compat_key_t key; 92 __compat_uid32_t uid; 93 __compat_gid32_t gid; 94 __compat_uid32_t cuid; 95 __compat_gid32_t cgid; 96 unsigned short mode; 97 unsigned short __pad1; 98 unsigned short seq; 99 unsigned short __pad2; 100 compat_ulong_t unused1; 101 compat_ulong_t unused2; 102 }; 103 104 struct compat_semid64_ds { 105 struct compat_ipc64_perm sem_perm; 106 compat_ulong_t sem_otime; 107 compat_ulong_t sem_otime_high; 108 compat_ulong_t sem_ctime; 109 compat_ulong_t sem_ctime_high; 110 compat_ulong_t sem_nsems; 111 compat_ulong_t __unused3; 112 compat_ulong_t __unused4; 113 }; 114 115 struct compat_msqid64_ds { 116 struct compat_ipc64_perm msg_perm; 117 compat_ulong_t msg_stime; 118 compat_ulong_t msg_stime_high; 119 compat_ulong_t msg_rtime; 120 compat_ulong_t msg_rtime_high; 121 compat_ulong_t msg_ctime; 122 compat_ulong_t msg_ctime_high; 123 compat_ulong_t msg_cbytes; 124 compat_ulong_t msg_qnum; 125 compat_ulong_t msg_qbytes; 126 compat_pid_t msg_lspid; 127 compat_pid_t msg_lrpid; 128 compat_ulong_t __unused4; 129 compat_ulong_t __unused5; 130 }; 131 132 struct compat_shmid64_ds { 133 struct compat_ipc64_perm shm_perm; 134 compat_size_t shm_segsz; 135 compat_ulong_t shm_atime; 136 compat_ulong_t shm_atime_high; 137 compat_ulong_t shm_dtime; 138 compat_ulong_t shm_dtime_high; 139 compat_ulong_t shm_ctime; 140 compat_ulong_t shm_ctime_high; 141 compat_pid_t shm_cpid; 142 compat_pid_t shm_lpid; 143 compat_ulong_t shm_nattch; 144 compat_ulong_t __unused4; 145 compat_ulong_t __unused5; 146 }; 147 148 static inline int is_compat_task(void) 149 { 150 return test_thread_flag(TIF_32BIT); 151 } 152 153 static inline int is_compat_thread(struct thread_info *thread) 154 { 155 return test_ti_thread_flag(thread, TIF_32BIT); 156 } 157 158 #else /* !CONFIG_COMPAT */ 159 160 static inline int is_compat_thread(struct thread_info *thread) 161 { 162 return 0; 163 } 164 165 #endif /* CONFIG_COMPAT */ 166 #endif /* __ASM_COMPAT_H */ 167