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#include <asm-generic/compat.h> 13 14#define COMPAT_USER_HZ 100 15#define COMPAT_UTS_MACHINE "mips\0\0\0" 16 17typedef s32 __compat_uid_t; 18typedef s32 __compat_gid_t; 19typedef __compat_uid_t __compat_uid32_t; 20typedef __compat_gid_t __compat_gid32_t; 21typedef u32 compat_mode_t; 22typedef u32 compat_dev_t; 23typedef u32 compat_nlink_t; 24typedef s32 compat_ipc_pid_t; 25typedef s32 compat_caddr_t; 26typedef struct { 27 s32 val[2]; 28} compat_fsid_t; 29typedef s64 compat_s64; 30typedef u64 compat_u64; 31 32struct compat_stat { 33 compat_dev_t st_dev; 34 s32 st_pad1[3]; 35 compat_ino_t st_ino; 36 compat_mode_t st_mode; 37 compat_nlink_t st_nlink; 38 __compat_uid_t st_uid; 39 __compat_gid_t st_gid; 40 compat_dev_t st_rdev; 41 s32 st_pad2[2]; 42 compat_off_t st_size; 43 s32 st_pad3; 44 old_time32_t st_atime; 45 s32 st_atime_nsec; 46 old_time32_t st_mtime; 47 s32 st_mtime_nsec; 48 old_time32_t st_ctime; 49 s32 st_ctime_nsec; 50 s32 st_blksize; 51 s32 st_blocks; 52 s32 st_pad4[14]; 53}; 54 55struct compat_flock { 56 short l_type; 57 short l_whence; 58 compat_off_t l_start; 59 compat_off_t l_len; 60 s32 l_sysid; 61 compat_pid_t l_pid; 62 s32 pad[4]; 63}; 64 65#define F_GETLK64 33 66#define F_SETLK64 34 67#define F_SETLKW64 35 68 69struct compat_flock64 { 70 short l_type; 71 short l_whence; 72 compat_loff_t l_start; 73 compat_loff_t l_len; 74 compat_pid_t l_pid; 75}; 76 77struct compat_statfs { 78 int f_type; 79 int f_bsize; 80 int f_frsize; 81 int f_blocks; 82 int f_bfree; 83 int f_files; 84 int f_ffree; 85 int f_bavail; 86 compat_fsid_t f_fsid; 87 int f_namelen; 88 int f_flags; 89 int f_spare[5]; 90}; 91 92#define COMPAT_RLIM_INFINITY 0x7fffffffUL 93 94typedef u32 compat_old_sigset_t; /* at least 32 bits */ 95 96#define _COMPAT_NSIG 128 /* Don't ask !$@#% ... */ 97#define _COMPAT_NSIG_BPW 32 98 99typedef u32 compat_sigset_word; 100 101#define COMPAT_OFF_T_MAX 0x7fffffff 102 103/* 104 * A pointer passed in from user mode. This should not 105 * be used for syscall parameters, just declare them 106 * as pointers because the syscall entry code will have 107 * appropriately converted them already. 108 */ 109 110static inline void __user *compat_ptr(compat_uptr_t uptr) 111{ 112 /* cast to a __user pointer via "unsigned long" makes sparse happy */ 113 return (void __user *)(unsigned long)(long)uptr; 114} 115 116static inline compat_uptr_t ptr_to_compat(void __user *uptr) 117{ 118 return (u32)(unsigned long)uptr; 119} 120 121static inline void __user *arch_compat_alloc_user_space(long len) 122{ 123 struct pt_regs *regs = (struct pt_regs *) 124 ((unsigned long) current_thread_info() + THREAD_SIZE - 32) - 1; 125 126 return (void __user *) (regs->regs[29] - len); 127} 128 129struct compat_ipc64_perm { 130 compat_key_t key; 131 __compat_uid32_t uid; 132 __compat_gid32_t gid; 133 __compat_uid32_t cuid; 134 __compat_gid32_t cgid; 135 compat_mode_t mode; 136 unsigned short seq; 137 unsigned short __pad2; 138 compat_ulong_t __unused1; 139 compat_ulong_t __unused2; 140}; 141 142struct compat_semid64_ds { 143 struct compat_ipc64_perm sem_perm; 144 compat_ulong_t sem_otime; 145 compat_ulong_t sem_ctime; 146 compat_ulong_t sem_nsems; 147 compat_ulong_t sem_otime_high; 148 compat_ulong_t sem_ctime_high; 149}; 150 151struct compat_msqid64_ds { 152 struct compat_ipc64_perm msg_perm; 153#ifndef CONFIG_CPU_LITTLE_ENDIAN 154 compat_ulong_t msg_stime_high; 155#endif 156 compat_ulong_t msg_stime; 157#ifdef CONFIG_CPU_LITTLE_ENDIAN 158 compat_ulong_t msg_stime_high; 159#endif 160#ifndef CONFIG_CPU_LITTLE_ENDIAN 161 compat_ulong_t msg_rtime_high; 162#endif 163 compat_ulong_t msg_rtime; 164#ifdef CONFIG_CPU_LITTLE_ENDIAN 165 compat_ulong_t msg_rtime_high; 166#endif 167#ifndef CONFIG_CPU_LITTLE_ENDIAN 168 compat_ulong_t msg_ctime_high; 169#endif 170 compat_ulong_t msg_ctime; 171#ifdef CONFIG_CPU_LITTLE_ENDIAN 172 compat_ulong_t msg_ctime_high; 173#endif 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 183struct 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_dtime; 188 compat_ulong_t shm_ctime; 189 compat_pid_t shm_cpid; 190 compat_pid_t shm_lpid; 191 compat_ulong_t shm_nattch; 192 compat_ushort_t shm_atime_high; 193 compat_ushort_t shm_dtime_high; 194 compat_ushort_t shm_ctime_high; 195 compat_ushort_t __unused2; 196}; 197 198/* MIPS has unusual order of fields in stack_t */ 199typedef struct compat_sigaltstack { 200 compat_uptr_t ss_sp; 201 compat_size_t ss_size; 202 int ss_flags; 203} compat_stack_t; 204#define compat_sigaltstack compat_sigaltstack 205 206static inline int is_compat_task(void) 207{ 208 return test_thread_flag(TIF_32BIT_ADDR); 209} 210 211#endif /* _ASM_COMPAT_H */ 212