arch/x86/include/asm/compat.h

   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 */