1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_COMPAT_H 3 #define _ASM_X86_COMPAT_H 4 5 /* 6 * Architecture specific compatibility types 7 */ 8 #include <linux/types.h> 9 #include <linux/sched.h> 10 #include <linux/sched/task_stack.h> 11 #include <asm/processor.h> 12 #include <asm/user32.h> 13 #include <asm/unistd.h> 14 15 #define compat_mode_t compat_mode_t 16 typedef u16 compat_mode_t; 17 18 #include <asm-generic/compat.h> 19 20 #define COMPAT_USER_HZ 100 21 #define COMPAT_UTS_MACHINE "i686\0\0" 22 23 typedef u16 __compat_uid_t; 24 typedef u16 __compat_gid_t; 25 typedef u16 compat_dev_t; 26 typedef u16 compat_nlink_t; 27 typedef u16 compat_ipc_pid_t; 28 typedef __kernel_fsid_t compat_fsid_t; 29 30 struct compat_stat { 31 compat_dev_t st_dev; 32 u16 __pad1; 33 compat_ino_t st_ino; 34 compat_mode_t st_mode; 35 compat_nlink_t st_nlink; 36 __compat_uid_t st_uid; 37 __compat_gid_t st_gid; 38 compat_dev_t st_rdev; 39 u16 __pad2; 40 u32 st_size; 41 u32 st_blksize; 42 u32 st_blocks; 43 u32 st_atime; 44 u32 st_atime_nsec; 45 u32 st_mtime; 46 u32 st_mtime_nsec; 47 u32 st_ctime; 48 u32 st_ctime_nsec; 49 u32 __unused4; 50 u32 __unused5; 51 }; 52 53 struct compat_flock { 54 short l_type; 55 short l_whence; 56 compat_off_t l_start; 57 compat_off_t l_len; 58 compat_pid_t l_pid; 59 }; 60 61 #define F_GETLK64 12 /* using 'struct flock64' */ 62 #define F_SETLK64 13 63 #define F_SETLKW64 14 64 65 /* 66 * IA32 uses 4 byte alignment for 64 bit quantities, 67 * so we need to pack this structure. 68 */ 69 struct 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 } __attribute__((packed)); 76 77 struct compat_statfs { 78 int f_type; 79 int f_bsize; 80 int f_blocks; 81 int f_bfree; 82 int f_bavail; 83 int f_files; 84 int f_ffree; 85 compat_fsid_t f_fsid; 86 int f_namelen; /* SunOS ignores this field. */ 87 int f_frsize; 88 int f_flags; 89 int f_spare[4]; 90 }; 91 92 #define COMPAT_RLIM_INFINITY 0xffffffff 93 94 #define COMPAT_OFF_T_MAX 0x7fffffff 95 96 struct compat_ipc64_perm { 97 compat_key_t key; 98 __compat_uid32_t uid; 99 __compat_gid32_t gid; 100 __compat_uid32_t cuid; 101 __compat_gid32_t cgid; 102 unsigned short mode; 103 unsigned short __pad1; 104 unsigned short seq; 105 unsigned short __pad2; 106 compat_ulong_t unused1; 107 compat_ulong_t unused2; 108 }; 109 110 struct compat_semid64_ds { 111 struct compat_ipc64_perm sem_perm; 112 compat_ulong_t sem_otime; 113 compat_ulong_t sem_otime_high; 114 compat_ulong_t sem_ctime; 115 compat_ulong_t sem_ctime_high; 116 compat_ulong_t sem_nsems; 117 compat_ulong_t __unused3; 118 compat_ulong_t __unused4; 119 }; 120 121 struct compat_msqid64_ds { 122 struct compat_ipc64_perm msg_perm; 123 compat_ulong_t msg_stime; 124 compat_ulong_t msg_stime_high; 125 compat_ulong_t msg_rtime; 126 compat_ulong_t msg_rtime_high; 127 compat_ulong_t msg_ctime; 128 compat_ulong_t msg_ctime_high; 129 compat_ulong_t msg_cbytes; 130 compat_ulong_t msg_qnum; 131 compat_ulong_t msg_qbytes; 132 compat_pid_t msg_lspid; 133 compat_pid_t msg_lrpid; 134 compat_ulong_t __unused4; 135 compat_ulong_t __unused5; 136 }; 137 138 struct compat_shmid64_ds { 139 struct compat_ipc64_perm shm_perm; 140 compat_size_t shm_segsz; 141 compat_ulong_t shm_atime; 142 compat_ulong_t shm_atime_high; 143 compat_ulong_t shm_dtime; 144 compat_ulong_t shm_dtime_high; 145 compat_ulong_t shm_ctime; 146 compat_ulong_t shm_ctime_high; 147 compat_pid_t shm_cpid; 148 compat_pid_t shm_lpid; 149 compat_ulong_t shm_nattch; 150 compat_ulong_t __unused4; 151 compat_ulong_t __unused5; 152 }; 153 154 #ifdef CONFIG_X86_X32_ABI 155 #define COMPAT_USE_64BIT_TIME \ 156 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 157 #endif 158 159 static inline bool in_x32_syscall(void) 160 { 161 #ifdef CONFIG_X86_X32_ABI 162 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 163 return true; 164 #endif 165 return false; 166 } 167 168 static inline bool in_32bit_syscall(void) 169 { 170 return in_ia32_syscall() || in_x32_syscall(); 171 } 172 173 #ifdef CONFIG_COMPAT 174 static inline bool in_compat_syscall(void) 175 { 176 return in_32bit_syscall(); 177 } 178 #define in_compat_syscall in_compat_syscall /* override the generic impl */ 179 #define compat_need_64bit_alignment_fixup in_ia32_syscall 180 #endif 181 182 struct compat_siginfo; 183 184 #ifdef CONFIG_X86_X32_ABI 185 int copy_siginfo_to_user32(struct compat_siginfo __user *to, 186 const kernel_siginfo_t *from); 187 #define copy_siginfo_to_user32 copy_siginfo_to_user32 188 #endif /* CONFIG_X86_X32_ABI */ 189 190 #endif /* _ASM_X86_COMPAT_H */ 191