LXR linux/arch/tile/include/asm/compat.h

   1/*
   2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3 *
   4 *   This program is free software; you can redistribute it and/or
   5 *   modify it under the terms of the GNU General Public License
   6 *   as published by the Free Software Foundation, version 2.
   7 *
   8 *   This program is distributed in the hope that it will be useful, but
   9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11 *   NON INFRINGEMENT.  See the GNU General Public License for
  12 *   more details.
  13 */
  14
  15#ifndef _ASM_TILE_COMPAT_H
  16#define _ASM_TILE_COMPAT_H
  17
  18/*
  19 * Architecture specific compatibility types
  20 */
  21#include <linux/types.h>
  22#include <linux/sched.h>
  23
  24#define COMPAT_USER_HZ  100
  25
  26/* "long" and pointer-based types are different. */
  27typedef s32             compat_long_t;
  28typedef u32             compat_ulong_t;
  29typedef u32             compat_size_t;
  30typedef s32             compat_ssize_t;
  31typedef s32             compat_off_t;
  32typedef s32             compat_time_t;
  33typedef s32             compat_clock_t;
  34typedef u32             compat_ino_t;
  35typedef u32             compat_caddr_t;
  36typedef u32             compat_uptr_t;
  37
  38/* Many types are "int" or otherwise the same. */
  39typedef __kernel_pid_t compat_pid_t;
  40typedef __kernel_uid_t __compat_uid_t;
  41typedef __kernel_gid_t __compat_gid_t;
  42typedef __kernel_uid32_t __compat_uid32_t;
  43typedef __kernel_uid32_t __compat_gid32_t;
  44typedef __kernel_mode_t compat_mode_t;
  45typedef __kernel_dev_t compat_dev_t;
  46typedef __kernel_loff_t compat_loff_t;
  47typedef __kernel_ipc_pid_t compat_ipc_pid_t;
  48typedef __kernel_daddr_t compat_daddr_t;
  49typedef __kernel_fsid_t compat_fsid_t;
  50typedef __kernel_timer_t compat_timer_t;
  51typedef __kernel_key_t compat_key_t;
  52typedef int compat_int_t;
  53typedef s64 compat_s64;
  54typedef uint compat_uint_t;
  55typedef u64 compat_u64;
  56
  57/* We use the same register dump format in 32-bit images. */
  58typedef unsigned long compat_elf_greg_t;
  59#define COMPAT_ELF_NGREG (sizeof(struct pt_regs) / sizeof(compat_elf_greg_t))
  60typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG];
  61
  62struct compat_timespec {
  63        compat_time_t   tv_sec;
  64        s32             tv_nsec;
  65};
  66
  67struct compat_timeval {
  68        compat_time_t   tv_sec;
  69        s32             tv_usec;
  70};
  71
  72#define compat_stat stat
  73#define compat_statfs statfs
  74
  75struct compat_sysctl {
  76        unsigned int    name;
  77        int             nlen;
  78        unsigned int    oldval;
  79        unsigned int    oldlenp;
  80        unsigned int    newval;
  81        unsigned int    newlen;
  82        unsigned int    __unused[4];
  83};
  84
  85
  86struct compat_flock {
  87        short           l_type;
  88        short           l_whence;
  89        compat_off_t    l_start;
  90        compat_off_t    l_len;
  91        compat_pid_t    l_pid;
  92};
  93
  94#define F_GETLK64       12      /*  using 'struct flock64' */
  95#define F_SETLK64       13
  96#define F_SETLKW64      14
  97
  98struct compat_flock64 {
  99        short           l_type;
 100        short           l_whence;
 101        compat_loff_t   l_start;
 102        compat_loff_t   l_len;
 103        compat_pid_t    l_pid;
 104};
 105
 106#define COMPAT_RLIM_INFINITY            0xffffffff
 107
 108#define _COMPAT_NSIG            64
 109#define _COMPAT_NSIG_BPW        32
 110
 111typedef u32               compat_sigset_word;
 112
 113typedef union compat_sigval {
 114        compat_int_t    sival_int;
 115        compat_uptr_t   sival_ptr;
 116} compat_sigval_t;
 117
 118#define COMPAT_SI_PAD_SIZE      (128/sizeof(int) - 3)
 119
 120typedef struct compat_siginfo {
 121        int si_signo;
 122        int si_errno;
 123        int si_code;
 124
 125        union {
 126                int _pad[COMPAT_SI_PAD_SIZE];
 127
 128                /* kill() */
 129                struct {
 130                        unsigned int _pid;      /* sender's pid */
 131                        unsigned int _uid;      /* sender's uid */
 132                } _kill;
 133
 134                /* POSIX.1b timers */
 135                struct {
 136                        compat_timer_t _tid;    /* timer id */
 137                        int _overrun;           /* overrun count */
 138                        compat_sigval_t _sigval;        /* same as below */
 139                        int _sys_private;       /* not to be passed to user */
 140                        int _overrun_incr;      /* amount to add to overrun */
 141                } _timer;
 142
 143                /* POSIX.1b signals */
 144                struct {
 145                        unsigned int _pid;      /* sender's pid */
 146                        unsigned int _uid;      /* sender's uid */
 147                        compat_sigval_t _sigval;
 148                } _rt;
 149
 150                /* SIGCHLD */
 151                struct {
 152                        unsigned int _pid;      /* which child */
 153                        unsigned int _uid;      /* sender's uid */
 154                        int _status;            /* exit code */
 155                        compat_clock_t _utime;
 156                        compat_clock_t _stime;
 157                } _sigchld;
 158
 159                /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
 160                struct {
 161                        unsigned int _addr;     /* faulting insn/memory ref. */
 162#ifdef __ARCH_SI_TRAPNO
 163                        int _trapno;    /* TRAP # which caused the signal */
 164#endif
 165                } _sigfault;
 166
 167                /* SIGPOLL */
 168                struct {
 169                        int _band;      /* POLL_IN, POLL_OUT, POLL_MSG */
 170                        int _fd;
 171                } _sigpoll;
 172        } _sifields;
 173} compat_siginfo_t;
 174
 175#define COMPAT_OFF_T_MAX        0x7fffffff
 176#define COMPAT_LOFF_T_MAX       0x7fffffffffffffffL
 177
 178struct compat_ipc64_perm {
 179        compat_key_t key;
 180        __compat_uid32_t uid;
 181        __compat_gid32_t gid;
 182        __compat_uid32_t cuid;
 183        __compat_gid32_t cgid;
 184        unsigned short mode;
 185        unsigned short __pad1;
 186        unsigned short seq;
 187        unsigned short __pad2;
 188        compat_ulong_t unused1;
 189        compat_ulong_t unused2;
 190};
 191
 192struct compat_semid64_ds {
 193        struct compat_ipc64_perm sem_perm;
 194        compat_time_t  sem_otime;
 195        compat_ulong_t __unused1;
 196        compat_time_t  sem_ctime;
 197        compat_ulong_t __unused2;
 198        compat_ulong_t sem_nsems;
 199        compat_ulong_t __unused3;
 200        compat_ulong_t __unused4;
 201};
 202
 203struct compat_msqid64_ds {
 204        struct compat_ipc64_perm msg_perm;
 205        compat_time_t  msg_stime;
 206        compat_ulong_t __unused1;
 207        compat_time_t  msg_rtime;
 208        compat_ulong_t __unused2;
 209        compat_time_t  msg_ctime;
 210        compat_ulong_t __unused3;
 211        compat_ulong_t msg_cbytes;
 212        compat_ulong_t msg_qnum;
 213        compat_ulong_t msg_qbytes;
 214        compat_pid_t   msg_lspid;
 215        compat_pid_t   msg_lrpid;
 216        compat_ulong_t __unused4;
 217        compat_ulong_t __unused5;
 218};
 219
 220struct compat_shmid64_ds {
 221        struct compat_ipc64_perm shm_perm;
 222        compat_size_t  shm_segsz;
 223        compat_time_t  shm_atime;
 224        compat_ulong_t __unused1;
 225        compat_time_t  shm_dtime;
 226        compat_ulong_t __unused2;
 227        compat_time_t  shm_ctime;
 228        compat_ulong_t __unused3;
 229        compat_pid_t   shm_cpid;
 230        compat_pid_t   shm_lpid;
 231        compat_ulong_t shm_nattch;
 232        compat_ulong_t __unused4;
 233        compat_ulong_t __unused5;
 234};
 235
 236/*
 237 * A pointer passed in from user mode. This should not
 238 * be used for syscall parameters, just declare them
 239 * as pointers because the syscall entry code will have
 240 * appropriately converted them already.
 241 */
 242
 243static inline void __user *compat_ptr(compat_uptr_t uptr)
 244{
 245        return (void __user *)(long)(s32)uptr;
 246}
 247
 248static inline compat_uptr_t ptr_to_compat(void __user *uptr)
 249{
 250        return (u32)(unsigned long)uptr;
 251}
 252
 253/* Sign-extend when storing a kernel pointer to a user's ptregs. */
 254static inline unsigned long ptr_to_compat_reg(void __user *uptr)
 255{
 256        return (long)(int)(long __force)uptr;
 257}
 258
 259static inline void __user *arch_compat_alloc_user_space(long len)
 260{
 261        struct pt_regs *regs = task_pt_regs(current);
 262        return (void __user *)regs->sp - len;
 263}
 264
 265static inline int is_compat_task(void)
 266{
 267        return current_thread_info()->status & TS_COMPAT;
 268}
 269
 270extern int compat_setup_rt_frame(struct ksignal *ksig, sigset_t *set,
 271                                 struct pt_regs *regs);
 272
 273/* Compat syscalls. */
 274struct compat_siginfo;
 275struct compat_sigaltstack;
 276long compat_sys_rt_sigreturn(void);
 277long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high);
 278long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high);
 279long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
 280                        u32 dummy, u32 low, u32 high);
 281long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
 282                         u32 dummy, u32 low, u32 high);
 283long compat_sys_sync_file_range2(int fd, unsigned int flags,
 284                                 u32 offset_lo, u32 offset_hi,
 285                                 u32 nbytes_lo, u32 nbytes_hi);
 286long compat_sys_fallocate(int fd, int mode,
 287                          u32 offset_lo, u32 offset_hi,
 288                          u32 len_lo, u32 len_hi);
 289long compat_sys_llseek(unsigned int fd, unsigned int offset_high,
 290                       unsigned int offset_low, loff_t __user * result,
 291                       unsigned int origin);
 292
 293/* Assembly trampoline to avoid clobbering r0. */
 294long _compat_sys_rt_sigreturn(void);
 295
 296#endif /* _ASM_TILE_COMPAT_H */
 297