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 16typedef 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 23typedef u16 __compat_uid_t; 24typedef u16 __compat_gid_t; 25typedef u16 compat_dev_t; 26typedef u16 compat_nlink_t; 27typedef u16 compat_ipc_pid_t; 28typedef __kernel_fsid_t compat_fsid_t; 29 30struct 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 53struct 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 */ 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} __attribute__((packed)); 76 77struct 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 96struct 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 110struct 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 121struct 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 138struct 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 159static 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 168static inline bool in_32bit_syscall(void) 169{ 170 return in_ia32_syscall() || in_x32_syscall(); 171} 172 173#ifdef CONFIG_COMPAT 174static 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 182struct compat_siginfo; 183 184#ifdef CONFIG_X86_X32_ABI 185int 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