include/asm-xtensa/unistd.h

   1 /*
   2  * include/asm-xtensa/unistd.h
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_UNISTD_H
  12 #define _XTENSA_UNISTD_H
  13
  14 #include <linux/linkage.h>
  15
  16 //#define __NR_setup              0 /* used only by init, to get system going */
  17 #define __NR_spill                0
  18 #define __NR_exit                 1
  19 #define __NR_fork                 2
  20 #define __NR_read                 3
  21 #define __NR_write                4
  22 #define __NR_open                 5
  23 #define __NR_close                6
  24 #define __NR_waitpid              7
  25 #define __NR_creat                8
  26 #define __NR_link                 9
  27 #define __NR_unlink              10
  28 #define __NR_execve              11
  29 #define __NR_chdir               12
  30 #define __NR_time                13
  31 #define __NR_mknod               14
  32 #define __NR_chmod               15
  33 #define __NR_lchown              16
  34 #define __NR_break               17
  35 #define __NR_oldstat             18
  36 #define __NR_lseek               19
  37 #define __NR_getpid              20
  38 #define __NR_mount               21
  39 #define __NR_oldumount           22
  40 #define __NR_setuid              23
  41 #define __NR_getuid              24
  42 #define __NR_stime               25
  43 #define __NR_ptrace              26
  44 #define __NR_alarm               27
  45 #define __NR_oldfstat            28
  46 #define __NR_pause               29
  47 #define __NR_utime               30
  48 #define __NR_stty                31
  49 #define __NR_gtty                32
  50 #define __NR_access              33
  51 #define __NR_nice                34
  52 #define __NR_ftime               35
  53 #define __NR_sync                36
  54 #define __NR_kill                37
  55 #define __NR_rename              38
  56 #define __NR_mkdir               39
  57 #define __NR_rmdir               40
  58 #define __NR_dup                 41
  59 #define __NR_pipe                42
  60 #define __NR_times               43
  61 #define __NR_prof                44
  62 #define __NR_brk                 45
  63 #define __NR_setgid              46
  64 #define __NR_getgid              47
  65 #define __NR_signal              48
  66 #define __NR_geteuid             49
  67 #define __NR_getegid             50
  68 #define __NR_acct                51
  69 #define __NR_umount              52
  70 #define __NR_lock                53
  71 #define __NR_ioctl               54
  72 #define __NR_fcntl               55
  73 #define __NR_mpx                 56
  74 #define __NR_setpgid             57
  75 #define __NR_ulimit              58
  76 #define __NR_oldolduname         59
  77 #define __NR_umask               60
  78 #define __NR_chroot              61
  79 #define __NR_ustat               62
  80 #define __NR_dup2                63
  81 #define __NR_getppid             64
  82 #define __NR_getpgrp             65
  83 #define __NR_setsid              66
  84 #define __NR_sigaction           67
  85 #define __NR_sgetmask            68
  86 #define __NR_ssetmask            69
  87 #define __NR_setreuid            70
  88 #define __NR_setregid            71
  89 #define __NR_sigsuspend          72
  90 #define __NR_sigpending          73
  91 #define __NR_sethostname         74
  92 #define __NR_setrlimit           75
  93 #define __NR_getrlimit           76     /* Back compatible 2Gig limited rlimit */
  94 #define __NR_getrusage           77
  95 #define __NR_gettimeofday        78
  96 #define __NR_settimeofday        79
  97 #define __NR_getgroups           80
  98 #define __NR_setgroups           81
  99 #define __NR_select              82
 100 #define __NR_symlink             83
 101 #define __NR_oldlstat            84
 102 #define __NR_readlink            85
 103 #define __NR_uselib              86
 104 #define __NR_swapon              87
 105 #define __NR_reboot              88
 106 #define __NR_readdir             89
 107 #define __NR_mmap                90
 108 #define __NR_munmap              91
 109 #define __NR_truncate            92
 110 #define __NR_ftruncate           93
 111 #define __NR_fchmod              94
 112 #define __NR_fchown              95
 113 #define __NR_getpriority         96
 114 #define __NR_setpriority         97
 115 #define __NR_profil              98
 116 #define __NR_statfs              99
 117 #define __NR_fstatfs            100
 118 #define __NR_ioperm             101
 119 #define __NR_socketcall         102
 120 #define __NR_syslog             103
 121 #define __NR_setitimer          104
 122 #define __NR_getitimer          105
 123 #define __NR_stat               106
 124 #define __NR_lstat              107
 125 #define __NR_fstat              108
 126 #define __NR_olduname           109
 127 #define __NR_iopl               110
 128 #define __NR_vhangup            111
 129 #define __NR_idle               112
 130 #define __NR_vm86               113
 131 #define __NR_wait4              114
 132 #define __NR_swapoff            115
 133 #define __NR_sysinfo            116
 134 #define __NR_ipc                117
 135 #define __NR_fsync              118
 136 #define __NR_sigreturn          119
 137 #define __NR_clone              120
 138 #define __NR_setdomainname      121
 139 #define __NR_uname              122
 140 #define __NR_modify_ldt         123
 141 #define __NR_adjtimex           124
 142 #define __NR_mprotect           125
 143 #define __NR_sigprocmask        126
 144 #define __NR_create_module      127
 145 #define __NR_init_module        128
 146 #define __NR_delete_module      129
 147 #define __NR_get_kernel_syms    130
 148 #define __NR_quotactl           131
 149 #define __NR_getpgid            132
 150 #define __NR_fchdir             133
 151 #define __NR_bdflush            134
 152 #define __NR_sysfs              135
 153 #define __NR_personality        136
 154 #define __NR_afs_syscall        137 /* Syscall for Andrew File System */
 155 #define __NR_setfsuid           138
 156 #define __NR_setfsgid           139
 157 #define __NR__llseek            140
 158 #define __NR_getdents           141
 159 #define __NR__newselect         142
 160 #define __NR_flock              143
 161 #define __NR_msync              144
 162 #define __NR_readv              145
 163 #define __NR_writev             146
 164 #define __NR_cacheflush         147
 165 #define __NR_cachectl           148
 166 #define __NR_sysxtensa          149
 167 #define __NR_sysdummy           150
 168 #define __NR_getsid             151
 169 #define __NR_fdatasync          152
 170 #define __NR__sysctl            153
 171 #define __NR_mlock              154
 172 #define __NR_munlock            155
 173 #define __NR_mlockall           156
 174 #define __NR_munlockall         157
 175 #define __NR_sched_setparam             158
 176 #define __NR_sched_getparam             159
 177 #define __NR_sched_setscheduler         160
 178 #define __NR_sched_getscheduler         161
 179 #define __NR_sched_yield                162
 180 #define __NR_sched_get_priority_max     163
 181 #define __NR_sched_get_priority_min     164
 182 #define __NR_sched_rr_get_interval      165
 183 #define __NR_nanosleep          166
 184 #define __NR_mremap             167
 185 #define __NR_accept             168
 186 #define __NR_bind               169
 187 #define __NR_connect            170
 188 #define __NR_getpeername        171
 189 #define __NR_getsockname        172
 190 #define __NR_getsockopt         173
 191 #define __NR_listen             174
 192 #define __NR_recv               175
 193 #define __NR_recvfrom           176
 194 #define __NR_recvmsg            177
 195 #define __NR_send               178
 196 #define __NR_sendmsg            179
 197 #define __NR_sendto             180
 198 #define __NR_setsockopt         181
 199 #define __NR_shutdown           182
 200 #define __NR_socket             183
 201 #define __NR_socketpair         184
 202 #define __NR_setresuid          185
 203 #define __NR_getresuid          186
 204 #define __NR_query_module       187
 205 #define __NR_poll               188
 206 #define __NR_nfsservctl         189
 207 #define __NR_setresgid          190
 208 #define __NR_getresgid          191
 209 #define __NR_prctl              192
 210 #define __NR_rt_sigreturn       193
 211 #define __NR_rt_sigaction       194
 212 #define __NR_rt_sigprocmask     195
 213 #define __NR_rt_sigpending      196
 214 #define __NR_rt_sigtimedwait    197
 215 #define __NR_rt_sigqueueinfo    198
 216 #define __NR_rt_sigsuspend      199
 217 #define __NR_pread              200
 218 #define __NR_pwrite             201
 219 #define __NR_chown              202
 220 #define __NR_getcwd             203
 221 #define __NR_capget             204
 222 #define __NR_capset             205
 223 #define __NR_sigaltstack        206
 224 #define __NR_sendfile           207
 225 #define __NR_streams1           208     /* some people actually want it */
 226 #define __NR_streams2           209     /* some people actually want it */
 227 #define __NR_mmap2              210
 228 #define __NR_truncate64         211
 229 #define __NR_ftruncate64        212
 230 #define __NR_stat64             213
 231 #define __NR_lstat64            214
 232 #define __NR_fstat64            215
 233 #define __NR_pivot_root         216
 234 #define __NR_mincore            217
 235 #define __NR_madvise            218
 236 #define __NR_getdents64         219
 237 #define __NR_vfork              220
 238
 239 /* Keep this last; should always equal the last valid call number. */
 240 #define __NR_Linux_syscalls     220
 241
 242 /* user-visible error numbers are in the range -1 - -125: see
 243  * <asm-xtensa/errno.h> */
 244
 245 #define SYSXTENSA_RESERVED         0    /* don't use this */
 246 #define SYSXTENSA_ATOMIC_SET       1    /* set variable */
 247 #define SYSXTENSA_ATOMIC_EXG_ADD   2    /* exchange memory and add */
 248 #define SYSXTENSA_ATOMIC_ADD       3    /* add to memory */
 249 #define SYSXTENSA_ATOMIC_CMP_SWP   4    /* compare and swap */
 250
 251 #define SYSXTENSA_COUNT            5    /* count of syscall0 functions*/
 252
 253 #ifdef __KERNEL__
 254 #define __syscall_return(type, res) return ((type)(res))
 255 #else
 256 #define __syscall_return(type, res) \
 257 do { \
 258         if ((unsigned long)(res) >= (unsigned long)(-125)) { \
 259         /* Avoid using "res" which is declared to be in register r2; \
 260          * errno might expand to a function call and clobber it.  */ \
 261                 int __err = -(res); \
 262                 errno = __err; \
 263                 res = -1; \
 264         } \
 265         return (type) (res); \
 266 } while (0)
 267 #endif
 268
 269
 270 /* Tensilica's xt-xcc compiler is much more agressive at code
 271  * optimization than gcc.  Multiple __asm__ statements are
 272  * insufficient for xt-xcc because subsequent optimization passes
 273  * (beyond the front-end that knows of __asm__ statements and other
 274  * such GNU Extensions to C) can modify the register selection for
 275  * containment of C variables.
 276  *
 277  * xt-xcc cannot modify the contents of a single __asm__ statement, so
 278  * we create single-asm versions of the syscall macros that are
 279  * suitable and optimal for both xt-xcc and gcc.
 280  *
 281  * Linux takes system-call arguments in registers.  The following
 282  * design is optimized for user-land apps (e.g., glibc) which
 283  * typically have a function wrapper around the "syscall" assembly
 284  * instruction.  It satisfies the Xtensa ABI while minizing argument
 285  * shifting.
 286  *
 287  * The Xtensa ABI and software conventions require the system-call
 288  * number in a2.  If an argument exists in a2, we move it to the next
 289  * available register.  Note that for improved efficiency, we do NOT
 290  * shift all parameters down one register to maintain the original
 291  * order.
 292  *
 293  * At best case (zero arguments), we just write the syscall number to
 294  * a2.  At worst case (1 to 6 arguments), we move the argument in a2
 295  * to the next available register, then write the syscall number to
 296  * a2.
 297  *
 298  * For clarity, the following truth table enumerates all possibilities.
 299  *
 300  * arguments    syscall number  arg0, arg1, arg2, arg3, arg4, arg5
 301  * ---------    --------------  ----------------------------------
 302  *      0             a2
 303  *      1             a2        a3
 304  *      2             a2        a4,   a3
 305  *      3             a2        a5,   a3,   a4
 306  *      4             a2        a6,   a3,   a4,   a5
 307  *      5             a2        a7,   a3,   a4,   a5,   a6
 308  *      6             a2        a8,   a3,   a4,   a5,   a6,   a7
 309  */
 310
 311 #define _syscall0(type,name) \
 312 type name(void) \
 313 { \
 314 long __res; \
 315 __asm__ __volatile__ ( \
 316         "  movi  a2, %1 \n" \
 317         "  syscall      \n" \
 318         "  mov   %0, a2 \n" \
 319         : "=a" (__res) \
 320         : "i" (__NR_##name) \
 321         : "a2" \
 322         ); \
 323 __syscall_return(type,__res); \
 324 }
 325
 326 #define _syscall1(type,name,type0,arg0) \
 327 type name(type0 arg0) \
 328 { \
 329 long __res; \
 330 __asm__ __volatile__ ( \
 331         "  mov   a3, %2 \n" \
 332         "  movi  a2, %1 \n" \
 333         "  syscall      \n" \
 334         "  mov   %0, a2 \n" \
 335         : "=a" (__res) \
 336         : "i" (__NR_##name), "a" (arg0) \
 337         : "a2", "a3" \
 338         ); \
 339 __syscall_return(type,__res); \
 340 }
 341
 342 #define _syscall2(type,name,type0,arg0,type1,arg1) \
 343 type name(type0 arg0,type1 arg1) \
 344 { \
 345 long __res; \
 346 __asm__ __volatile__ ( \
 347         "  mov   a4, %2 \n" \
 348         "  mov   a3, %3 \n" \
 349         "  movi  a2, %1 \n" \
 350         "  syscall      \n" \
 351         "  mov   %0, a2 \n" \
 352         : "=a" (__res) \
 353         : "i" (__NR_##name), "a" (arg0), "a" (arg1) \
 354         : "a2", "a3", "a4" \
 355         ); \
 356 __syscall_return(type,__res); \
 357 }
 358
 359 #define _syscall3(type,name,type0,arg0,type1,arg1,type2,arg2) \
 360 type name(type0 arg0,type1 arg1,type2 arg2) \
 361 { \
 362 long __res; \
 363 __asm__ __volatile__ ( \
 364         "  mov   a5, %2 \n" \
 365         "  mov   a4, %4 \n" \
 366         "  mov   a3, %3 \n" \
 367         "  movi  a2, %1 \n" \
 368         "  syscall      \n" \
 369         "  mov   %0, a2 \n" \
 370         : "=a" (__res) \
 371         : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2) \
 372         : "a2", "a3", "a4", "a5" \
 373         ); \
 374 __syscall_return(type,__res); \
 375 }
 376
 377 #define _syscall4(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3) \
 378 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3) \
 379 { \
 380 long __res; \
 381 __asm__ __volatile__ ( \
 382         "  mov   a6, %2 \n" \
 383         "  mov   a5, %5 \n" \
 384         "  mov   a4, %4 \n" \
 385         "  mov   a3, %3 \n" \
 386         "  movi  a2, %1 \n" \
 387         "  syscall      \n" \
 388         "  mov   %0, a2 \n" \
 389         : "=a" (__res) \
 390         : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), "a" (arg3) \
 391         : "a2", "a3", "a4", "a5", "a6" \
 392         ); \
 393 __syscall_return(type,__res); \
 394 }
 395
 396 /* Note that we save and restore the a7 frame pointer.
 397  * Including a7 in the clobber list doesn't do what you'd expect.
 398  */
 399 #define _syscall5(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
 400 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4) \
 401 { \
 402 long __res; \
 403 __asm__ __volatile__ ( \
 404         "  mov   a9, a7 \n" \
 405         "  mov   a7, %2 \n" \
 406         "  mov   a6, %6 \n" \
 407         "  mov   a5, %5 \n" \
 408         "  mov   a4, %4 \n" \
 409         "  mov   a3, %3 \n" \
 410         "  movi  a2, %1 \n" \
 411         "  syscall      \n" \
 412         "  mov   a7, a9 \n" \
 413         "  mov   %0, a2 \n" \
 414         : "=a" (__res) \
 415         : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
 416                              "a" (arg3), "a" (arg4) \
 417         : "a2", "a3", "a4", "a5", "a6", "a9" \
 418         ); \
 419 __syscall_return(type,__res); \
 420 }
 421
 422 /* Note that we save and restore the a7 frame pointer.
 423  * Including a7 in the clobber list doesn't do what you'd expect.
 424  */
 425 #define _syscall6(type,name,type0,arg0,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
 426 type name(type0 arg0,type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
 427 { \
 428 long __res; \
 429 __asm__ __volatile__ ( \
 430         "  mov   a9, a7 \n" \
 431         "  mov   a8, %2 \n" \
 432         "  mov   a7, %7 \n" \
 433         "  mov   a6, %6 \n" \
 434         "  mov   a5, %5 \n" \
 435         "  mov   a4, %4 \n" \
 436         "  mov   a3, %3 \n" \
 437         "  movi  a2, %1 \n" \
 438         "  syscall      \n" \
 439         "  mov   a7, a9 \n" \
 440         "  mov   %0, a2 \n" \
 441         : "=a" (__res) \
 442         : "i" (__NR_##name), "a" (arg0), "a" (arg1), "a" (arg2), \
 443                              "a" (arg3), "a" (arg4), "a" (arg5)  \
 444         : "a2", "a3", "a4", "a5", "a6", "a8", "a9" \
 445         ); \
 446 __syscall_return(type,__res); \
 447 }
 448
 449
 450 #ifdef __KERNEL_SYSCALLS__
 451
 452 #include <linux/compiler.h>
 453 #include <linux/types.h>
 454 #include <linux/syscalls.h>
 455
 456 /*
 457  * we need this inline - forking from kernel space will result
 458  * in NO COPY ON WRITE (!!!), until an execve is executed. This
 459  * is no problem, but for the stack. This is handled by not letting
 460  * main() use the stack at all after fork(). Thus, no function
 461  * calls - which means inline code for fork too, as otherwise we
 462  * would use the stack upon exit from 'fork()'.
 463  *
 464  * Actually only pause and fork are needed inline, so that there
 465  * won't be any messing with the stack from main(), but we define
 466  * some others too.
 467  */
 468
 469 #define __NR__exit __NR_exit
 470
 471 static __inline__ _syscall0(int,pause)
 472 //static __inline__ _syscall1(int,setup,int,magic) FIXME
 473 static __inline__ _syscall0(int,sync)
 474 static __inline__ _syscall0(pid_t,setsid)
 475 static __inline__ _syscall3(int,write,int,fd,const char *,buf,off_t,count)
 476 static __inline__ _syscall3(int,read,int,fd,char *,buf,off_t,count)
 477 static __inline__ _syscall3(off_t,lseek,int,fd,off_t,offset,int,count)
 478 static __inline__ _syscall1(int,dup,int,fd)
 479 static __inline__ _syscall3(int,execve,const char*,file,char**,argv,char**,envp)
 480 static __inline__ _syscall3(int,open,const char *,file,int,flag,int,mode)
 481 static __inline__ _syscall1(int,close,int,fd)
 482 static __inline__ _syscall1(int,_exit,int,exitcode)
 483 static __inline__ _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
 484 static __inline__ _syscall1(int,delete_module,const char *,name)
 485
 486 struct stat;
 487 static __inline__ _syscall2(int,fstat,int,fd,struct stat *,buf)
 488 static __inline__ _syscall0(pid_t,getpid)
 489 static __inline__ _syscall2(int,kill,int,pid,int,sig)
 490 static __inline__ _syscall2(int,stat,const char *, path,struct stat *,buf)
 491 static __inline__ _syscall1(int,unlink,char *,pathname)
 492
 493
 494
 495 extern pid_t waitpid(int, int*, int );
 496 static __inline__ pid_t wait(int * wait_stat)
 497 {
 498         return waitpid(-1,wait_stat,0);
 499 }
 500 #endif
 501
 502 /*
 503  * "Conditional" syscalls
 504  *
 505  * What we want is __attribute__((weak,alias("sys_ni_syscall"))),
 506  * but it doesn't work on all toolchains, so we just do it by hand
 507  */
 508 #define cond_syscall(x) asm(".weak\t" #x "\n\t.set\t" #x ",sys_ni_syscall");
 509
 510 #ifdef __KERNEL__
 511 #define __ARCH_WANT_IPC_PARSE_VERSION
 512 #define __ARCH_WANT_OLD_READDIR
 513 #define __ARCH_WANT_OLD_STAT
 514 #define __ARCH_WANT_STAT64
 515 #define __ARCH_WANT_SYS_ALARM
 516 #define __ARCH_WANT_SYS_GETHOSTNAME
 517 #define __ARCH_WANT_SYS_PAUSE
 518 #define __ARCH_WANT_SYS_SGETMASK
 519 #define __ARCH_WANT_SYS_SIGNAL
 520 #define __ARCH_WANT_SYS_TIME
 521 #define __ARCH_WANT_SYS_UTIME
 522 #define __ARCH_WANT_SYS_WAITPID
 523 #define __ARCH_WANT_SYS_SOCKETCALL
 524 #define __ARCH_WANT_SYS_FADVISE64
 525 #define __ARCH_WANT_SYS_GETPGRP
 526 #define __ARCH_WANT_SYS_LLSEEK
 527 #define __ARCH_WANT_SYS_NICE
 528 #define __ARCH_WANT_SYS_OLD_GETRLIMIT
 529 #define __ARCH_WANT_SYS_OLDUMOUNT
 530 #define __ARCH_WANT_SYS_SIGPENDING
 531 #define __ARCH_WANT_SYS_SIGPROCMASK
 532 #define __ARCH_WANT_SYS_RT_SIGACTION
 533 #endif
 534
 535
 536
 537 #endif  /* _XTENSA_UNISTD_H */