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TOMOYO Linux Cross Reference
Linux/arch/x86/include/asm/compat.h

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  1 #ifndef _ASM_X86_COMPAT_H
  2 #define _ASM_X86_COMPAT_H
  3 
  4 /*
  5  * Architecture specific compatibility types
  6  */
  7 #include <linux/types.h>
  8 #include <linux/sched.h>
  9 #include <asm/processor.h>
 10 #include <asm/user32.h>
 11 #include <asm/unistd.h>
 12 
 13 #define COMPAT_USER_HZ          100
 14 #define COMPAT_UTS_MACHINE      "i686\0\0"
 15 
 16 typedef u32             compat_size_t;
 17 typedef s32             compat_ssize_t;
 18 typedef s32             compat_time_t;
 19 typedef s32             compat_clock_t;
 20 typedef s32             compat_pid_t;
 21 typedef u16             __compat_uid_t;
 22 typedef u16             __compat_gid_t;
 23 typedef u32             __compat_uid32_t;
 24 typedef u32             __compat_gid32_t;
 25 typedef u16             compat_mode_t;
 26 typedef u32             compat_ino_t;
 27 typedef u16             compat_dev_t;
 28 typedef s32             compat_off_t;
 29 typedef s64             compat_loff_t;
 30 typedef u16             compat_nlink_t;
 31 typedef u16             compat_ipc_pid_t;
 32 typedef s32             compat_daddr_t;
 33 typedef u32             compat_caddr_t;
 34 typedef __kernel_fsid_t compat_fsid_t;
 35 typedef s32             compat_timer_t;
 36 typedef s32             compat_key_t;
 37 
 38 typedef s32             compat_int_t;
 39 typedef s32             compat_long_t;
 40 typedef s64 __attribute__((aligned(4))) compat_s64;
 41 typedef u32             compat_uint_t;
 42 typedef u32             compat_ulong_t;
 43 typedef u64 __attribute__((aligned(4))) compat_u64;
 44 typedef u32             compat_uptr_t;
 45 
 46 struct compat_timespec {
 47         compat_time_t   tv_sec;
 48         s32             tv_nsec;
 49 };
 50 
 51 struct compat_timeval {
 52         compat_time_t   tv_sec;
 53         s32             tv_usec;
 54 };
 55 
 56 struct compat_stat {
 57         compat_dev_t    st_dev;
 58         u16             __pad1;
 59         compat_ino_t    st_ino;
 60         compat_mode_t   st_mode;
 61         compat_nlink_t  st_nlink;
 62         __compat_uid_t  st_uid;
 63         __compat_gid_t  st_gid;
 64         compat_dev_t    st_rdev;
 65         u16             __pad2;
 66         u32             st_size;
 67         u32             st_blksize;
 68         u32             st_blocks;
 69         u32             st_atime;
 70         u32             st_atime_nsec;
 71         u32             st_mtime;
 72         u32             st_mtime_nsec;
 73         u32             st_ctime;
 74         u32             st_ctime_nsec;
 75         u32             __unused4;
 76         u32             __unused5;
 77 };
 78 
 79 struct compat_flock {
 80         short           l_type;
 81         short           l_whence;
 82         compat_off_t    l_start;
 83         compat_off_t    l_len;
 84         compat_pid_t    l_pid;
 85 };
 86 
 87 #define F_GETLK64       12      /*  using 'struct flock64' */
 88 #define F_SETLK64       13
 89 #define F_SETLKW64      14
 90 
 91 /*
 92  * IA32 uses 4 byte alignment for 64 bit quantities,
 93  * so we need to pack this structure.
 94  */
 95 struct compat_flock64 {
 96         short           l_type;
 97         short           l_whence;
 98         compat_loff_t   l_start;
 99         compat_loff_t   l_len;
100         compat_pid_t    l_pid;
101 } __attribute__((packed));
102 
103 struct compat_statfs {
104         int             f_type;
105         int             f_bsize;
106         int             f_blocks;
107         int             f_bfree;
108         int             f_bavail;
109         int             f_files;
110         int             f_ffree;
111         compat_fsid_t   f_fsid;
112         int             f_namelen;      /* SunOS ignores this field. */
113         int             f_frsize;
114         int             f_flags;
115         int             f_spare[4];
116 };
117 
118 #define COMPAT_RLIM_OLD_INFINITY        0x7fffffff
119 #define COMPAT_RLIM_INFINITY            0xffffffff
120 
121 typedef u32             compat_old_sigset_t;    /* at least 32 bits */
122 
123 #define _COMPAT_NSIG            64
124 #define _COMPAT_NSIG_BPW        32
125 
126 typedef u32               compat_sigset_word;
127 
128 typedef union compat_sigval {
129         compat_int_t    sival_int;
130         compat_uptr_t   sival_ptr;
131 } compat_sigval_t;
132 
133 typedef struct compat_siginfo {
134         int si_signo;
135         int si_errno;
136         int si_code;
137 
138         union {
139                 int _pad[128/sizeof(int) - 3];
140 
141                 /* kill() */
142                 struct {
143                         unsigned int _pid;      /* sender's pid */
144                         unsigned int _uid;      /* sender's uid */
145                 } _kill;
146 
147                 /* POSIX.1b timers */
148                 struct {
149                         compat_timer_t _tid;    /* timer id */
150                         int _overrun;           /* overrun count */
151                         compat_sigval_t _sigval;        /* same as below */
152                         int _sys_private;       /* not to be passed to user */
153                         int _overrun_incr;      /* amount to add to overrun */
154                 } _timer;
155 
156                 /* POSIX.1b signals */
157                 struct {
158                         unsigned int _pid;      /* sender's pid */
159                         unsigned int _uid;      /* sender's uid */
160                         compat_sigval_t _sigval;
161                 } _rt;
162 
163                 /* SIGCHLD */
164                 struct {
165                         unsigned int _pid;      /* which child */
166                         unsigned int _uid;      /* sender's uid */
167                         int _status;            /* exit code */
168                         compat_clock_t _utime;
169                         compat_clock_t _stime;
170                 } _sigchld;
171 
172                 /* SIGCHLD (x32 version) */
173                 struct {
174                         unsigned int _pid;      /* which child */
175                         unsigned int _uid;      /* sender's uid */
176                         int _status;            /* exit code */
177                         compat_s64 _utime;
178                         compat_s64 _stime;
179                 } _sigchld_x32;
180 
181                 /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
182                 struct {
183                         unsigned int _addr;     /* faulting insn/memory ref. */
184                 } _sigfault;
185 
186                 /* SIGPOLL */
187                 struct {
188                         int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
189                         int _fd;
190                 } _sigpoll;
191 
192                 struct {
193                         unsigned int _call_addr; /* calling insn */
194                         int _syscall;   /* triggering system call number */
195                         unsigned int _arch;     /* AUDIT_ARCH_* of syscall */
196                 } _sigsys;
197         } _sifields;
198 } compat_siginfo_t;
199 
200 #define COMPAT_OFF_T_MAX        0x7fffffff
201 #define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
202 
203 struct compat_ipc64_perm {
204         compat_key_t key;
205         __compat_uid32_t uid;
206         __compat_gid32_t gid;
207         __compat_uid32_t cuid;
208         __compat_gid32_t cgid;
209         unsigned short mode;
210         unsigned short __pad1;
211         unsigned short seq;
212         unsigned short __pad2;
213         compat_ulong_t unused1;
214         compat_ulong_t unused2;
215 };
216 
217 struct compat_semid64_ds {
218         struct compat_ipc64_perm sem_perm;
219         compat_time_t  sem_otime;
220         compat_ulong_t __unused1;
221         compat_time_t  sem_ctime;
222         compat_ulong_t __unused2;
223         compat_ulong_t sem_nsems;
224         compat_ulong_t __unused3;
225         compat_ulong_t __unused4;
226 };
227 
228 struct compat_msqid64_ds {
229         struct compat_ipc64_perm msg_perm;
230         compat_time_t  msg_stime;
231         compat_ulong_t __unused1;
232         compat_time_t  msg_rtime;
233         compat_ulong_t __unused2;
234         compat_time_t  msg_ctime;
235         compat_ulong_t __unused3;
236         compat_ulong_t msg_cbytes;
237         compat_ulong_t msg_qnum;
238         compat_ulong_t msg_qbytes;
239         compat_pid_t   msg_lspid;
240         compat_pid_t   msg_lrpid;
241         compat_ulong_t __unused4;
242         compat_ulong_t __unused5;
243 };
244 
245 struct compat_shmid64_ds {
246         struct compat_ipc64_perm shm_perm;
247         compat_size_t  shm_segsz;
248         compat_time_t  shm_atime;
249         compat_ulong_t __unused1;
250         compat_time_t  shm_dtime;
251         compat_ulong_t __unused2;
252         compat_time_t  shm_ctime;
253         compat_ulong_t __unused3;
254         compat_pid_t   shm_cpid;
255         compat_pid_t   shm_lpid;
256         compat_ulong_t shm_nattch;
257         compat_ulong_t __unused4;
258         compat_ulong_t __unused5;
259 };
260 
261 /*
262  * The type of struct elf_prstatus.pr_reg in compatible core dumps.
263  */
264 #ifdef CONFIG_X86_X32_ABI
265 typedef struct user_regs_struct compat_elf_gregset_t;
266 
267 #define PR_REG_SIZE(S) (test_thread_flag(TIF_IA32) ? 68 : 216)
268 #define PRSTATUS_SIZE(S) (test_thread_flag(TIF_IA32) ? 144 : 296)
269 #define SET_PR_FPVALID(S,V) \
270   do { *(int *) (((void *) &((S)->pr_reg)) + PR_REG_SIZE(0)) = (V); } \
271   while (0)
272 
273 #define COMPAT_USE_64BIT_TIME \
274         (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
275 #else
276 typedef struct user_regs_struct32 compat_elf_gregset_t;
277 #endif
278 
279 /*
280  * A pointer passed in from user mode. This should not
281  * be used for syscall parameters, just declare them
282  * as pointers because the syscall entry code will have
283  * appropriately converted them already.
284  */
285 
286 static inline void __user *compat_ptr(compat_uptr_t uptr)
287 {
288         return (void __user *)(unsigned long)uptr;
289 }
290 
291 static inline compat_uptr_t ptr_to_compat(void __user *uptr)
292 {
293         return (u32)(unsigned long)uptr;
294 }
295 
296 static inline void __user *arch_compat_alloc_user_space(long len)
297 {
298         compat_uptr_t sp;
299 
300         if (test_thread_flag(TIF_IA32)) {
301                 sp = task_pt_regs(current)->sp;
302         } else {
303                 /* -128 for the x32 ABI redzone */
304                 sp = task_pt_regs(current)->sp - 128;
305         }
306 
307         return (void __user *)round_down(sp - len, 16);
308 }
309 
310 static inline bool in_x32_syscall(void)
311 {
312 #ifdef CONFIG_X86_X32_ABI
313         if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
314                 return true;
315 #endif
316         return false;
317 }
318 
319 static inline bool in_compat_syscall(void)
320 {
321         return in_ia32_syscall() || in_x32_syscall();
322 }
323 #define in_compat_syscall in_compat_syscall     /* override the generic impl */
324 
325 #endif /* _ASM_X86_COMPAT_H */
326 

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