1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_COMPAT_H 3#define _ASM_COMPAT_H 4/* 5 * Architecture specific compatibility types 6 */ 7#include <linux/thread_info.h> 8#include <linux/types.h> 9#include <asm/page.h> 10#include <asm/ptrace.h> 11 12#define COMPAT_USER_HZ 100 13#define COMPAT_UTS_MACHINE "mips\0\0\0" 14 15typedef u32 compat_size_t; 16typedef s32 compat_ssize_t; 17typedef s32 compat_time_t; 18typedef s32 compat_clock_t; 19typedef s32 compat_suseconds_t; 20 21typedef s32 compat_pid_t; 22typedef s32 __compat_uid_t; 23typedef s32 __compat_gid_t; 24typedef __compat_uid_t __compat_uid32_t; 25typedef __compat_gid_t __compat_gid32_t; 26typedef u32 compat_mode_t; 27typedef u32 compat_ino_t; 28typedef u32 compat_dev_t; 29typedef s32 compat_off_t; 30typedef s64 compat_loff_t; 31typedef u32 compat_nlink_t; 32typedef s32 compat_ipc_pid_t; 33typedef s32 compat_daddr_t; 34typedef s32 compat_caddr_t; 35typedef struct { 36 s32 val[2]; 37} compat_fsid_t; 38typedef s32 compat_timer_t; 39typedef s32 compat_key_t; 40 41typedef s32 compat_int_t; 42typedef s32 compat_long_t; 43typedef s64 compat_s64; 44typedef u32 compat_uint_t; 45typedef u32 compat_ulong_t; 46typedef u64 compat_u64; 47typedef u32 compat_uptr_t; 48 49struct compat_timespec { 50 compat_time_t tv_sec; 51 s32 tv_nsec; 52}; 53 54struct compat_timeval { 55 compat_time_t tv_sec; 56 s32 tv_usec; 57}; 58 59struct compat_stat { 60 compat_dev_t st_dev; 61 s32 st_pad1[3]; 62 compat_ino_t st_ino; 63 compat_mode_t st_mode; 64 compat_nlink_t st_nlink; 65 __compat_uid_t st_uid; 66 __compat_gid_t st_gid; 67 compat_dev_t st_rdev; 68 s32 st_pad2[2]; 69 compat_off_t st_size; 70 s32 st_pad3; 71 compat_time_t st_atime; 72 s32 st_atime_nsec; 73 compat_time_t st_mtime; 74 s32 st_mtime_nsec; 75 compat_time_t st_ctime; 76 s32 st_ctime_nsec; 77 s32 st_blksize; 78 s32 st_blocks; 79 s32 st_pad4[14]; 80}; 81 82struct compat_flock { 83 short l_type; 84 short l_whence; 85 compat_off_t l_start; 86 compat_off_t l_len; 87 s32 l_sysid; 88 compat_pid_t l_pid; 89 s32 pad[4]; 90}; 91 92#define F_GETLK64 33 93#define F_SETLK64 34 94#define F_SETLKW64 35 95 96struct compat_flock64 { 97 short l_type; 98 short l_whence; 99 compat_loff_t l_start; 100 compat_loff_t l_len; 101 compat_pid_t l_pid; 102}; 103 104struct compat_statfs { 105 int f_type; 106 int f_bsize; 107 int f_frsize; 108 int f_blocks; 109 int f_bfree; 110 int f_files; 111 int f_ffree; 112 int f_bavail; 113 compat_fsid_t f_fsid; 114 int f_namelen; 115 int f_flags; 116 int f_spare[5]; 117}; 118 119#define COMPAT_RLIM_INFINITY 0x7fffffffUL 120 121typedef u32 compat_old_sigset_t; /* at least 32 bits */ 122 123#define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */ 124#define _COMPAT_NSIG_BPW 32 125 126typedef u32 compat_sigset_word; 127 128#define COMPAT_OFF_T_MAX 0x7fffffff 129 130/* 131 * A pointer passed in from user mode. This should not 132 * be used for syscall parameters, just declare them 133 * as pointers because the syscall entry code will have 134 * appropriately converted them already. 135 */ 136 137static inline void __user *compat_ptr(compat_uptr_t uptr) 138{ 139 /* cast to a __user pointer via "unsigned long" makes sparse happy */ 140 return (void __user *)(unsigned long)(long)uptr; 141} 142 143static inline compat_uptr_t ptr_to_compat(void __user *uptr) 144{ 145 return (u32)(unsigned long)uptr; 146} 147 148static inline void __user *arch_compat_alloc_user_space(long len) 149{ 150 struct pt_regs *regs = (struct pt_regs *) 151 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1; 152 153 return (void __user *) (regs->regs[29] - len); 154} 155 156struct compat_ipc64_perm { 157 compat_key_t key; 158 __compat_uid32_t uid; 159 __compat_gid32_t gid; 160 __compat_uid32_t cuid; 161 __compat_gid32_t cgid; 162 compat_mode_t mode; 163 unsigned short seq; 164 unsigned short __pad2; 165 compat_ulong_t __unused1; 166 compat_ulong_t __unused2; 167}; 168 169struct compat_semid64_ds { 170 struct compat_ipc64_perm sem_perm; 171 compat_time_t sem_otime; 172 compat_time_t sem_ctime; 173 compat_ulong_t sem_nsems; 174 compat_ulong_t __unused1; 175 compat_ulong_t __unused2; 176}; 177 178struct compat_msqid64_ds { 179 struct compat_ipc64_perm msg_perm; 180#ifndef CONFIG_CPU_LITTLE_ENDIAN 181 compat_ulong_t __unused1; 182#endif 183 compat_time_t msg_stime; 184#ifdef CONFIG_CPU_LITTLE_ENDIAN 185 compat_ulong_t __unused1; 186#endif 187#ifndef CONFIG_CPU_LITTLE_ENDIAN 188 compat_ulong_t __unused2; 189#endif 190 compat_time_t msg_rtime; 191#ifdef CONFIG_CPU_LITTLE_ENDIAN 192 compat_ulong_t __unused2; 193#endif 194#ifndef CONFIG_CPU_LITTLE_ENDIAN 195 compat_ulong_t __unused3; 196#endif 197 compat_time_t msg_ctime; 198#ifdef CONFIG_CPU_LITTLE_ENDIAN 199 compat_ulong_t __unused3; 200#endif 201 compat_ulong_t msg_cbytes; 202 compat_ulong_t msg_qnum; 203 compat_ulong_t msg_qbytes; 204 compat_pid_t msg_lspid; 205 compat_pid_t msg_lrpid; 206 compat_ulong_t __unused4; 207 compat_ulong_t __unused5; 208}; 209 210struct compat_shmid64_ds { 211 struct compat_ipc64_perm shm_perm; 212 compat_size_t shm_segsz; 213 compat_time_t shm_atime; 214 compat_time_t shm_dtime; 215 compat_time_t shm_ctime; 216 compat_pid_t shm_cpid; 217 compat_pid_t shm_lpid; 218 compat_ulong_t shm_nattch; 219 compat_ulong_t __unused1; 220 compat_ulong_t __unused2; 221}; 222 223/* MIPS has unusual order of fields in stack_t */ 224typedef struct compat_sigaltstack { 225 compat_uptr_t ss_sp; 226 compat_size_t ss_size; 227 int ss_flags; 228} compat_stack_t; 229#define compat_sigaltstack compat_sigaltstack 230 231static inline int is_compat_task(void) 232{ 233 return test_thread_flag(TIF_32BIT_ADDR); 234} 235 236#endif /* _ASM_COMPAT_H */ 237