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 u32 st_dev; 32 compat_ino_t st_ino; 33 compat_mode_t st_mode; 34 compat_nlink_t st_nlink; 35 __compat_uid_t st_uid; 36 __compat_gid_t st_gid; 37 u32 st_rdev; 38 u32 st_size; 39 u32 st_blksize; 40 u32 st_blocks; 41 u32 st_atime; 42 u32 st_atime_nsec; 43 u32 st_mtime; 44 u32 st_mtime_nsec; 45 u32 st_ctime; 46 u32 st_ctime_nsec; 47 u32 __unused4; 48 u32 __unused5; 49 }; 50 51 struct compat_flock { 52 short l_type; 53 short l_whence; 54 compat_off_t l_start; 55 compat_off_t l_len; 56 compat_pid_t l_pid; 57 }; 58 59 #define F_GETLK64 12 /* using 'struct flock64' */ 60 #define F_SETLK64 13 61 #define F_SETLKW64 14 62 63 /* 64 * IA32 uses 4 byte alignment for 64 bit quantities, 65 * so we need to pack this structure. 66 */ 67 struct compat_flock64 { 68 short l_type; 69 short l_whence; 70 compat_loff_t l_start; 71 compat_loff_t l_len; 72 compat_pid_t l_pid; 73 } __attribute__((packed)); 74 75 struct compat_statfs { 76 int f_type; 77 int f_bsize; 78 int f_blocks; 79 int f_bfree; 80 int f_bavail; 81 int f_files; 82 int f_ffree; 83 compat_fsid_t f_fsid; 84 int f_namelen; /* SunOS ignores this field. */ 85 int f_frsize; 86 int f_flags; 87 int f_spare[4]; 88 }; 89 90 #define COMPAT_RLIM_INFINITY 0xffffffff 91 92 #define COMPAT_OFF_T_MAX 0x7fffffff 93 94 struct compat_ipc64_perm { 95 compat_key_t key; 96 __compat_uid32_t uid; 97 __compat_gid32_t gid; 98 __compat_uid32_t cuid; 99 __compat_gid32_t cgid; 100 unsigned short mode; 101 unsigned short __pad1; 102 unsigned short seq; 103 unsigned short __pad2; 104 compat_ulong_t unused1; 105 compat_ulong_t unused2; 106 }; 107 108 struct compat_semid64_ds { 109 struct compat_ipc64_perm sem_perm; 110 compat_ulong_t sem_otime; 111 compat_ulong_t sem_otime_high; 112 compat_ulong_t sem_ctime; 113 compat_ulong_t sem_ctime_high; 114 compat_ulong_t sem_nsems; 115 compat_ulong_t __unused3; 116 compat_ulong_t __unused4; 117 }; 118 119 struct compat_msqid64_ds { 120 struct compat_ipc64_perm msg_perm; 121 compat_ulong_t msg_stime; 122 compat_ulong_t msg_stime_high; 123 compat_ulong_t msg_rtime; 124 compat_ulong_t msg_rtime_high; 125 compat_ulong_t msg_ctime; 126 compat_ulong_t msg_ctime_high; 127 compat_ulong_t msg_cbytes; 128 compat_ulong_t msg_qnum; 129 compat_ulong_t msg_qbytes; 130 compat_pid_t msg_lspid; 131 compat_pid_t msg_lrpid; 132 compat_ulong_t __unused4; 133 compat_ulong_t __unused5; 134 }; 135 136 struct compat_shmid64_ds { 137 struct compat_ipc64_perm shm_perm; 138 compat_size_t shm_segsz; 139 compat_ulong_t shm_atime; 140 compat_ulong_t shm_atime_high; 141 compat_ulong_t shm_dtime; 142 compat_ulong_t shm_dtime_high; 143 compat_ulong_t shm_ctime; 144 compat_ulong_t shm_ctime_high; 145 compat_pid_t shm_cpid; 146 compat_pid_t shm_lpid; 147 compat_ulong_t shm_nattch; 148 compat_ulong_t __unused4; 149 compat_ulong_t __unused5; 150 }; 151 152 #ifdef CONFIG_X86_X32_ABI 153 #define COMPAT_USE_64BIT_TIME \ 154 (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 155 #endif 156 157 static inline bool in_x32_syscall(void) 158 { 159 #ifdef CONFIG_X86_X32_ABI 160 if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 161 return true; 162 #endif 163 return false; 164 } 165 166 static inline bool in_32bit_syscall(void) 167 { 168 return in_ia32_syscall() || in_x32_syscall(); 169 } 170 171 #ifdef CONFIG_COMPAT 172 static inline bool in_compat_syscall(void) 173 { 174 return in_32bit_syscall(); 175 } 176 #define in_compat_syscall in_compat_syscall /* override the generic impl */ 177 #define compat_need_64bit_alignment_fixup in_ia32_syscall 178 #endif 179 180 struct compat_siginfo; 181 182 #ifdef CONFIG_X86_X32_ABI 183 int copy_siginfo_to_user32(struct compat_siginfo __user *to, 184 const kernel_siginfo_t *from); 185 #define copy_siginfo_to_user32 copy_siginfo_to_user32 186 #endif /* CONFIG_X86_X32_ABI */ 187 188 #endif /* _ASM_X86_COMPAT_H */ 189