libc-top-half/musl/src/internal/syscall.h

   1 #ifndef _INTERNAL_SYSCALL_H
   2 #define _INTERNAL_SYSCALL_H
   3
   4 #include <features.h>
   5 #include <errno.h>
   6 #include <sys/syscall.h>
   7 #include "syscall_arch.h"
   8
   9 #ifndef SYSCALL_RLIM_INFINITY
  10 #define SYSCALL_RLIM_INFINITY (~0ULL)
  11 #endif
  12
  13 #ifndef SYSCALL_MMAP2_UNIT
  14 #define SYSCALL_MMAP2_UNIT 4096ULL
  15 #endif
  16
  17 #ifndef __SYSCALL_LL_PRW
  18 #define __SYSCALL_LL_PRW(x) __SYSCALL_LL_O(x)
  19 #endif
  20
  21 #ifndef __scc
  22 #define __scc(X) ((long) (X))
  23 typedef long syscall_arg_t;
  24 #endif
  25
  26 hidden long __syscall_ret(unsigned long),
  27         __syscall_cp(syscall_arg_t, syscall_arg_t, syscall_arg_t, syscall_arg_t,
  28                      syscall_arg_t, syscall_arg_t, syscall_arg_t);
  29
  30 #define __syscall1(n,a) __syscall1(n,__scc(a))
  31 #define __syscall2(n,a,b) __syscall2(n,__scc(a),__scc(b))
  32 #define __syscall3(n,a,b,c) __syscall3(n,__scc(a),__scc(b),__scc(c))
  33 #define __syscall4(n,a,b,c,d) __syscall4(n,__scc(a),__scc(b),__scc(c),__scc(d))
  34 #define __syscall5(n,a,b,c,d,e) __syscall5(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e))
  35 #define __syscall6(n,a,b,c,d,e,f) __syscall6(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
  36 #define __syscall7(n,a,b,c,d,e,f,g) __syscall7(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f),__scc(g))
  37
  38 #define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
  39 #define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,7,6,5,4,3,2,1,0,)
  40 #define __SYSCALL_CONCAT_X(a,b) a##b
  41 #define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
  42 #define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
  43
  44 #define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
  45 #define syscall(...) __syscall_ret(__syscall(__VA_ARGS__))
  46
  47 #define socketcall(nm,a,b,c,d,e,f) __syscall_ret(__socketcall(nm,a,b,c,d,e,f))
  48 #define socketcall_cp(nm,a,b,c,d,e,f) __syscall_ret(__socketcall_cp(nm,a,b,c,d,e,f))
  49
  50 #define __syscall_cp0(n) (__syscall_cp)(n,0,0,0,0,0,0)
  51 #define __syscall_cp1(n,a) (__syscall_cp)(n,__scc(a),0,0,0,0,0)
  52 #define __syscall_cp2(n,a,b) (__syscall_cp)(n,__scc(a),__scc(b),0,0,0,0)
  53 #define __syscall_cp3(n,a,b,c) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),0,0,0)
  54 #define __syscall_cp4(n,a,b,c,d) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),0,0)
  55 #define __syscall_cp5(n,a,b,c,d,e) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),0)
  56 #define __syscall_cp6(n,a,b,c,d,e,f) (__syscall_cp)(n,__scc(a),__scc(b),__scc(c),__scc(d),__scc(e),__scc(f))
  57
  58 #define __syscall_cp(...) __SYSCALL_DISP(__syscall_cp,__VA_ARGS__)
  59 #define syscall_cp(...) __syscall_ret(__syscall_cp(__VA_ARGS__))
  60
  61 static inline long __alt_socketcall(int sys, int sock, int cp, long a, long b, long c, long d, long e, long f)
  62 {
  63         long r;
  64         if (cp) r = __syscall_cp(sys, a, b, c, d, e, f);
  65         else r = __syscall(sys, a, b, c, d, e, f);
  66         if (r != -ENOSYS) return r;
  67 #ifdef SYS_socketcall
  68         if (cp) r = __syscall_cp(SYS_socketcall, sock, ((long[6]){a, b, c, d, e, f}));
  69         else r = __syscall(SYS_socketcall, sock, ((long[6]){a, b, c, d, e, f}));
  70 #endif
  71         return r;
  72 }
  73 #define __socketcall(nm, a, b, c, d, e, f) __alt_socketcall(SYS_##nm, __SC_##nm, 0, \
  74         (long)(a), (long)(b), (long)(c), (long)(d), (long)(e), (long)(f))
  75 #define __socketcall_cp(nm, a, b, c, d, e, f) __alt_socketcall(SYS_##nm, __SC_##nm, 1, \
  76         (long)(a), (long)(b), (long)(c), (long)(d), (long)(e), (long)(f))
  77
  78 /* fixup legacy 16-bit junk */
  79
  80 #ifdef SYS_getuid32
  81 #undef SYS_lchown
  82 #undef SYS_getuid
  83 #undef SYS_getgid
  84 #undef SYS_geteuid
  85 #undef SYS_getegid
  86 #undef SYS_setreuid
  87 #undef SYS_setregid
  88 #undef SYS_getgroups
  89 #undef SYS_setgroups
  90 #undef SYS_fchown
  91 #undef SYS_setresuid
  92 #undef SYS_getresuid
  93 #undef SYS_setresgid
  94 #undef SYS_getresgid
  95 #undef SYS_chown
  96 #undef SYS_setuid
  97 #undef SYS_setgid
  98 #undef SYS_setfsuid
  99 #undef SYS_setfsgid
 100 #define SYS_lchown SYS_lchown32
 101 #define SYS_getuid SYS_getuid32
 102 #define SYS_getgid SYS_getgid32
 103 #define SYS_geteuid SYS_geteuid32
 104 #define SYS_getegid SYS_getegid32
 105 #define SYS_setreuid SYS_setreuid32
 106 #define SYS_setregid SYS_setregid32
 107 #define SYS_getgroups SYS_getgroups32
 108 #define SYS_setgroups SYS_setgroups32
 109 #define SYS_fchown SYS_fchown32
 110 #define SYS_setresuid SYS_setresuid32
 111 #define SYS_getresuid SYS_getresuid32
 112 #define SYS_setresgid SYS_setresgid32
 113 #define SYS_getresgid SYS_getresgid32
 114 #define SYS_chown SYS_chown32
 115 #define SYS_setuid SYS_setuid32
 116 #define SYS_setgid SYS_setgid32
 117 #define SYS_setfsuid SYS_setfsuid32
 118 #define SYS_setfsgid SYS_setfsgid32
 119 #endif
 120
 121
 122 /* fixup legacy 32-bit-vs-lfs64 junk */
 123
 124 #ifdef SYS_fcntl64
 125 #undef SYS_fcntl
 126 #define SYS_fcntl SYS_fcntl64
 127 #endif
 128
 129 #ifdef SYS_getdents64
 130 #undef SYS_getdents
 131 #define SYS_getdents SYS_getdents64
 132 #endif
 133
 134 #ifdef SYS_ftruncate64
 135 #undef SYS_ftruncate
 136 #undef SYS_truncate
 137 #define SYS_ftruncate SYS_ftruncate64
 138 #define SYS_truncate SYS_truncate64
 139 #endif
 140
 141 #ifdef SYS_stat64
 142 #undef SYS_stat
 143 #define SYS_stat SYS_stat64
 144 #endif
 145
 146 #ifdef SYS_fstat64
 147 #undef SYS_fstat
 148 #define SYS_fstat SYS_fstat64
 149 #endif
 150
 151 #ifdef SYS_lstat64
 152 #undef SYS_lstat
 153 #define SYS_lstat SYS_lstat64
 154 #endif
 155
 156 #ifdef SYS_statfs64
 157 #undef SYS_statfs
 158 #define SYS_statfs SYS_statfs64
 159 #endif
 160
 161 #ifdef SYS_fstatfs64
 162 #undef SYS_fstatfs
 163 #define SYS_fstatfs SYS_fstatfs64
 164 #endif
 165
 166 #if defined(SYS_newfstatat)
 167 #undef SYS_fstatat
 168 #define SYS_fstatat SYS_newfstatat
 169 #elif defined(SYS_fstatat64)
 170 #undef SYS_fstatat
 171 #define SYS_fstatat SYS_fstatat64
 172 #endif
 173
 174 #ifdef SYS_ugetrlimit
 175 #undef SYS_getrlimit
 176 #define SYS_getrlimit SYS_ugetrlimit
 177 #endif
 178
 179 #ifdef SYS__newselect
 180 #undef SYS_select
 181 #define SYS_select SYS__newselect
 182 #endif
 183
 184 #ifdef SYS_pread64
 185 #undef SYS_pread
 186 #undef SYS_pwrite
 187 #define SYS_pread SYS_pread64
 188 #define SYS_pwrite SYS_pwrite64
 189 #endif
 190
 191 #ifdef SYS_fadvise64_64
 192 #undef SYS_fadvise
 193 #define SYS_fadvise SYS_fadvise64_64
 194 #elif defined(SYS_fadvise64)
 195 #undef SYS_fadvise
 196 #define SYS_fadvise SYS_fadvise64
 197 #endif
 198
 199 #ifdef SYS_sendfile64
 200 #undef SYS_sendfile
 201 #define SYS_sendfile SYS_sendfile64
 202 #endif
 203
 204 #ifndef SYS_timer_settime
 205 #define SYS_timer_settime SYS_timer_settime32
 206 #endif
 207
 208 #ifndef SYS_timer_gettime
 209 #define SYS_timer_gettime SYS_timer_gettime32
 210 #endif
 211
 212 #ifndef SYS_timerfd_settime
 213 #define SYS_timerfd_settime SYS_timerfd_settime32
 214 #endif
 215
 216 #ifndef SYS_timerfd_gettime
 217 #define SYS_timerfd_gettime SYS_timerfd_gettime32
 218 #endif
 219
 220 #ifndef SYS_clock_settime
 221 #define SYS_clock_settime SYS_clock_settime32
 222 #endif
 223
 224 #ifndef SYS_clock_gettime
 225 #define SYS_clock_gettime SYS_clock_gettime32
 226 #endif
 227
 228 #ifndef SYS_clock_getres
 229 #define SYS_clock_getres SYS_clock_getres_time32
 230 #endif
 231
 232 #ifndef SYS_clock_nanosleep
 233 #define SYS_clock_nanosleep SYS_clock_nanosleep_time32
 234 #endif
 235
 236 #ifndef SYS_gettimeofday
 237 #define SYS_gettimeofday SYS_gettimeofday_time32
 238 #endif
 239
 240 #ifndef SYS_settimeofday
 241 #define SYS_settimeofday SYS_settimeofday_time32
 242 #endif
 243
 244 /* Ensure that the plain syscall names are defined even for "time64-only"
 245  * archs. These facilitate callers passing null time arguments, and make
 246  * tests for establishing which to use/fallback-to more consistent when
 247  * they do need to be called with time arguments. */
 248
 249 #ifndef SYS_clock_gettime
 250 #define SYS_clock_gettime SYS_clock_gettime64
 251 #endif
 252
 253 #ifndef SYS_clock_settime
 254 #define SYS_clock_settime SYS_clock_settime64
 255 #endif
 256
 257 #ifndef SYS_clock_adjtime
 258 #define SYS_clock_adjtime SYS_clock_adjtime64
 259 #endif
 260
 261 #ifndef SYS_clock_getres
 262 #define SYS_clock_getres SYS_clock_getres_time64
 263 #endif
 264
 265 #ifndef SYS_clock_nanosleep
 266 #define SYS_clock_nanosleep SYS_clock_nanosleep_time64
 267 #endif
 268
 269 #ifndef SYS_timer_gettime
 270 #define SYS_timer_gettime SYS_timer_gettime64
 271 #endif
 272
 273 #ifndef SYS_timer_settime
 274 #define SYS_timer_settime SYS_timer_settime64
 275 #endif
 276
 277 #ifndef SYS_timerfd_gettime
 278 #define SYS_timerfd_gettime SYS_timerfd_gettime64
 279 #endif
 280
 281 #ifndef SYS_timerfd_settime
 282 #define SYS_timerfd_settime SYS_timerfd_settime64
 283 #endif
 284
 285 #ifndef SYS_utimensat
 286 #define SYS_utimensat SYS_utimensat_time64
 287 #endif
 288
 289 #ifndef SYS_pselect6
 290 #define SYS_pselect6 SYS_pselect6_time64
 291 #endif
 292
 293 #ifndef SYS_ppoll
 294 #define SYS_ppoll SYS_ppoll_time64
 295 #endif
 296
 297 #ifndef SYS_recvmmsg
 298 #define SYS_recvmmsg SYS_recvmmsg_time64
 299 #endif
 300
 301 #ifndef SYS_mq_timedsend
 302 #define SYS_mq_timedsend SYS_mq_timedsend_time64
 303 #endif
 304
 305 #ifndef SYS_mq_timedreceive
 306 #define SYS_mq_timedreceive SYS_mq_timedreceive_time64
 307 #endif
 308
 309 /* SYS_semtimedop omitted because SYS_ipc may provide it */
 310
 311 #ifndef SYS_rt_sigtimedwait
 312 #define SYS_rt_sigtimedwait SYS_rt_sigtimedwait_time64
 313 #endif
 314
 315 #ifndef SYS_futex
 316 #define SYS_futex SYS_futex_time64
 317 #endif
 318
 319 #ifndef SYS_sched_rr_get_interval
 320 #define SYS_sched_rr_get_interval SYS_sched_rr_get_interval_time64
 321 #endif
 322
 323
 324
 325
 326 /* socketcall calls */
 327
 328 #define __SC_socket      1
 329 #define __SC_bind        2
 330 #define __SC_connect     3
 331 #define __SC_listen      4
 332 #define __SC_accept      5
 333 #define __SC_getsockname 6
 334 #define __SC_getpeername 7
 335 #define __SC_socketpair  8
 336 #define __SC_send        9
 337 #define __SC_recv        10
 338 #define __SC_sendto      11
 339 #define __SC_recvfrom    12
 340 #define __SC_shutdown    13
 341 #define __SC_setsockopt  14
 342 #define __SC_getsockopt  15
 343 #define __SC_sendmsg     16
 344 #define __SC_recvmsg     17
 345 #define __SC_accept4     18
 346 #define __SC_recvmmsg    19
 347 #define __SC_sendmmsg    20
 348
 349 /* This is valid only because all socket syscalls are made via
 350  * socketcall, which always fills unused argument slots with zeros. */
 351 #ifndef SYS_accept
 352 #define SYS_accept SYS_accept4
 353 #endif
 354
 355 #ifndef SO_RCVTIMEO_OLD
 356 #define SO_RCVTIMEO_OLD  20
 357 #endif
 358 #ifndef SO_SNDTIMEO_OLD
 359 #define SO_SNDTIMEO_OLD  21
 360 #endif
 361
 362 #define SO_TIMESTAMP_OLD    29
 363 #define SO_TIMESTAMPNS_OLD  35
 364 #define SO_TIMESTAMPING_OLD 37
 365 #define SCM_TIMESTAMP_OLD    SO_TIMESTAMP_OLD
 366 #define SCM_TIMESTAMPNS_OLD  SO_TIMESTAMPNS_OLD
 367 #define SCM_TIMESTAMPING_OLD SO_TIMESTAMPING_OLD
 368
 369 #ifndef SIOCGSTAMP_OLD
 370 #define SIOCGSTAMP_OLD 0x8906
 371 #endif
 372 #ifndef SIOCGSTAMPNS_OLD
 373 #define SIOCGSTAMPNS_OLD 0x8907
 374 #endif
 375
 376 #ifdef SYS_open
 377 #define __sys_open2(x,pn,fl) __syscall2(SYS_open, pn, (fl)|O_LARGEFILE)
 378 #define __sys_open3(x,pn,fl,mo) __syscall3(SYS_open, pn, (fl)|O_LARGEFILE, mo)
 379 #define __sys_open_cp2(x,pn,fl) __syscall_cp2(SYS_open, pn, (fl)|O_LARGEFILE)
 380 #define __sys_open_cp3(x,pn,fl,mo) __syscall_cp3(SYS_open, pn, (fl)|O_LARGEFILE, mo)
 381 #else
 382 #define __sys_open2(x,pn,fl) __syscall3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
 383 #define __sys_open3(x,pn,fl,mo) __syscall4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
 384 #define __sys_open_cp2(x,pn,fl) __syscall_cp3(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE)
 385 #define __sys_open_cp3(x,pn,fl,mo) __syscall_cp4(SYS_openat, AT_FDCWD, pn, (fl)|O_LARGEFILE, mo)
 386 #endif
 387
 388 #define __sys_open(...) __SYSCALL_DISP(__sys_open,,__VA_ARGS__)
 389 #define sys_open(...) __syscall_ret(__sys_open(__VA_ARGS__))
 390
 391 #define __sys_open_cp(...) __SYSCALL_DISP(__sys_open_cp,,__VA_ARGS__)
 392 #define sys_open_cp(...) __syscall_ret(__sys_open_cp(__VA_ARGS__))
 393
 394 hidden void __procfdname(char __buf[static 15+3*sizeof(int)], unsigned);
 395
 396 hidden void *__vdsosym(const char *, const char *);
 397
 398 #endif