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