まず，BSD互換のシステムコールが存在する．/usr/include/sys/syscall.hに定義が書かれている．
#define SYS_syscall 0
#define SYS_exit 1
#define SYS_fork 2
#define SYS_read 3
#define SYS_write 4
#define SYS_open 5
#define SYS_close 6
#define SYS_wait4 7
/* 8 old creat */
#define SYS_link 9
#define SYS_unlink 10
/* 11 old execv */
#define SYS_chdir 12
#define SYS_fchdir 13
#define SYS_mknod 14
#define SYS_chmod 15
#define SYS_chown 16
#define SYS_obreak 17
#if COMPAT_GETFSSTAT
#define SYS_ogetfsstat 18
#else
#define SYS_getfsstat 18
#endif
/* 19 old lseek */
#define SYS_getpid 20
/* 21 old mount */
/* 22 old umount */
#define SYS_setuid 23
#define SYS_getuid 24
#define SYS_geteuid 25
#define SYS_ptrace 26
#define SYS_recvmsg 27
#define SYS_sendmsg 28
#define SYS_recvfrom 29
#define SYS_accept 30
#define SYS_getpeername 31
#define SYS_getsockname 32
#define SYS_access 33
#define SYS_chflags 34
#define SYS_fchflags 35
#define SYS_sync 36
#define SYS_kill 37
/* 38 old stat */
#define SYS_getppid 39
/* 40 old lstat */
#define SYS_dup 41
#define SYS_pipe 42
#define SYS_getegid 43
#define SYS_profil 44
#define SYS_ktrace 45
#define SYS_sigaction 46
#define SYS_getgid 47
#define SYS_sigprocmask 48
#define SYS_getlogin 49
#define SYS_setlogin 50
#define SYS_acct 51
#define SYS_sigpending 52
#define SYS_sigaltstack 53
#define SYS_ioctl 54
#define SYS_reboot 55
#define SYS_revoke 56
#define SYS_symlink 57
#define SYS_readlink 58
#define SYS_execve 59
#define SYS_umask 60
#define SYS_chroot 61
/* 62 old fstat */
/* 63 used internally , reserved */
/* 64 old getpagesize */
#define SYS_msync 65
#define SYS_vfork 66
/* 67 old vread */
/* 68 old vwrite */
#define SYS_sbrk 69
#define SYS_sstk 70
/* 71 old mmap */
#define SYS_ovadvise 72
#define SYS_munmap 73
#define SYS_mprotect 74
#define SYS_madvise 75
/* 76 old vhangup */
/* 77 old vlimit */
#define SYS_mincore 78
#define SYS_getgroups 79
#define SYS_setgroups 80
#define SYS_getpgrp 81
#define SYS_setpgid 82
#define SYS_setitimer 83
/* 84 old wait */
#define SYS_swapon 85
#define SYS_getitimer 86
/* 87 old gethostname */
/* 88 old sethostname */
#define SYS_getdtablesize 89
#define SYS_dup2 90
/* 91 old getdopt */
#define SYS_fcntl 92
#define SYS_select 93
/* 94 old setdopt */
#define SYS_fsync 95
#define SYS_setpriority 96
#define SYS_socket 97
#define SYS_connect 98
/* 99 old accept */
#define SYS_getpriority 100
/* 101 old send */
/* 102 old recv */
/* 103 old sigreturn */
#define SYS_bind 104
#define SYS_setsockopt 105
#define SYS_listen 106
/* 107 old vtimes */
/* 108 old sigvec */
/* 109 old sigblock */
/* 110 old sigsetmask */
#define SYS_sigsuspend 111
/* 112 old sigstack */
/* 113 old recvmsg */
/* 114 old sendmsg */
/* 115 old vtrace */
#define SYS_gettimeofday 116
#define SYS_getrusage 117
#define SYS_getsockopt 118
/* 119 old resuba */
#define SYS_readv 120
#define SYS_writev 121
#define SYS_settimeofday 122
#define SYS_fchown 123
#define SYS_fchmod 124
/* 125 old recvfrom */
/* 126 old setreuid */
/* 127 old setregid */
#define SYS_rename 128
/* 129 old truncate */
/* 130 old ftruncate */
#define SYS_flock 131
#define SYS_mkfifo 132
#define SYS_sendto 133
#define SYS_shutdown 134
#define SYS_socketpair 135
#define SYS_mkdir 136
#define SYS_rmdir 137
#define SYS_utimes 138
#define SYS_futimes 139
#define SYS_adjtime 140
/* 141 old getpeername */
/* 142 old gethostid */
/* 143 old sethostid */
/* 144 old getrlimit */
/* 145 old setrlimit */
/* 146 old killpg */
#define SYS_setsid 147
/* 148 old setquota */
/* 149 old qquota */
/* 150 old getsockname */
#define SYS_getpgid 151
#define SYS_setprivexec 152
#define SYS_pread 153
#define SYS_pwrite 154
#if NFSSERVER
#define SYS_nfssvc 155
#else
/* 155 */
#endif
/* 156 old getdirentries */
#define SYS_statfs 157
#define SYS_fstatfs 158
#define SYS_unmount 159
/* 160 old async_daemon */
#if NFSCLIENT
#define SYS_getfh 161
#else
/* 161 */
#endif
/* 162 old getdomainname */
/* 163 old setdomainname */
/* 164 */
#define SYS_quotactl 165
/* 166 old exportfs */
#define SYS_mount 167
/* 168 old ustat */
/* 169 */
#define SYS_table 170
/* 171 old wait3 */
/* 172 old rpause */
#define SYS_waitid 173
/* 174 old getdents */
/* 175 old gc_control */
#define SYS_add_profil 176
/* 177 */
/* 178 */
/* 179 */
#define SYS_kdebug_trace 180
#define SYS_setgid 181
#define SYS_setegid 182
#define SYS_seteuid 183
#define SYS_sigreturn 184
#define SYS_chud 185
/* 186 */
/* 187 */
#define SYS_stat 188
#define SYS_fstat 189
#define SYS_lstat 190
#define SYS_pathconf 191
#define SYS_fpathconf 192
#if COMPAT_GETFSSTAT
#define SYS_getfsstat 193
#else
/* 193 */
#endif
#define SYS_getrlimit 194
#define SYS_setrlimit 195
#define SYS_getdirentries 196
#define SYS_mmap 197
/* 198 __syscall */
#define SYS_lseek 199
#define SYS_truncate 200
#define SYS_ftruncate 201
#define SYS___sysctl 202
#define SYS_mlock 203
#define SYS_munlock 204
#define SYS_undelete 205
#define SYS_ATsocket 206
#define SYS_ATgetmsg 207
#define SYS_ATputmsg 208
#define SYS_ATPsndreq 209
#define SYS_ATPsndrsp 210
#define SYS_ATPgetreq 211
#define SYS_ATPgetrsp 212
/* 213 Reserved for AppleTalk */
#define SYS_kqueue_from_portset_np 214
#define SYS_kqueue_portset_np 215
#define SYS_mkcomplex 216
#define SYS_statv 217
#define SYS_lstatv 218
#define SYS_fstatv 219
#define SYS_getattrlist 220
#define SYS_setattrlist 221
#define SYS_getdirentriesattr 222
#define SYS_exchangedata 223
#ifdef __APPLE_API_OBSOLETE
#define SYS_checkuseraccess 224
#else
/* 224 HFS checkuseraccess check access to a file */
#endif /* __APPLE_API_OBSOLETE */
#define SYS_searchfs 225
#define SYS_delete 226
#define SYS_copyfile 227
/* 228 */
/* 229 */
#define SYS_poll 230
#define SYS_watchevent 231
#define SYS_waitevent 232
#define SYS_modwatch 233
#define SYS_getxattr 234
#define SYS_fgetxattr 235
#define SYS_setxattr 236
#define SYS_fsetxattr 237
#define SYS_removexattr 238
#define SYS_fremovexattr 239
#define SYS_listxattr 240
#define SYS_flistxattr 241
#define SYS_fsctl 242
#define SYS_initgroups 243
/* 244 */
/* 245 */
/* 246 */
#if NFSCLIENT
#define SYS_nfsclnt 247
#define SYS_fhopen 248
#else
/* 247 */
/* 248 */
#endif
/* 249 */
#define SYS_minherit 250
#define SYS_semsys 251
#define SYS_msgsys 252
#define SYS_shmsys 253
#define SYS_semctl 254
#define SYS_semget 255
#define SYS_semop 256
/* 257 */
#define SYS_msgctl 258
#define SYS_msgget 259
#define SYS_msgsnd 260
#define SYS_msgrcv 261
#define SYS_shmat 262
#define SYS_shmctl 263
#define SYS_shmdt 264
#define SYS_shmget 265
#define SYS_shm_open 266
#define SYS_shm_unlink 267
#define SYS_sem_open 268
#define SYS_sem_close 269
#define SYS_sem_unlink 270
#define SYS_sem_wait 271
#define SYS_sem_trywait 272
#define SYS_sem_post 273
#define SYS_sem_getvalue 274
#define SYS_sem_init 275
#define SYS_sem_destroy 276
#define SYS_open_extended 277
#define SYS_umask_extended 278
#define SYS_stat_extended 279
#define SYS_lstat_extended 280
#define SYS_fstat_extended 281
#define SYS_chmod_extended 282
#define SYS_fchmod_extended 283
#define SYS_access_extended 284
#define SYS_settid 285
#define SYS_gettid 286
#define SYS_setsgroups 287
#define SYS_getsgroups 288
#define SYS_setwgroups 289
#define SYS_getwgroups 290
#define SYS_mkfifo_extended 291
#define SYS_mkdir_extended 292
#define SYS_identitysvc 293
/* 294 */
/* 295 */
#define SYS_load_shared_file 296
#define SYS_reset_shared_file 297
#define SYS_new_system_shared_regions 298
#define SYS_shared_region_map_file_np 299
#define SYS_shared_region_make_private_np 300
/* 301 */
/* 302 */
/* 303 */
/* 304 */
/* 305 */
/* 306 */
/* 307 */
/* 308 */
/* 309 */
#define SYS_getsid 310
#define SYS_settid_with_pid 311
/* 312 */
#define SYS_aio_fsync 313
#define SYS_aio_return 314
#define SYS_aio_suspend 315
#define SYS_aio_cancel 316
#define SYS_aio_error 317
#define SYS_aio_read 318
#define SYS_aio_write 319
#define SYS_lio_listio 320
/* 321 */
/* 322 */
/* 323 */
#define SYS_mlockall 324
#define SYS_munlockall 325
/* 326 */
#define SYS_issetugid 327
#define SYS___pthread_kill 328
#define SYS_pthread_sigmask 329
#define SYS_sigwait 330
#define SYS___disable_threadsignal 331
#define SYS___pthread_markcancel 332
#define SYS___pthread_canceled 333
#define SYS___semwait_signal 334
#define SYS_utrace 335
#define SYS_proc_info 336
/* 337 */
/* 338 */
/* 339 */
/* 340 */
/* 341 */
/* 342 */
/* 343 */
/* 344 */
/* 345 */
/* 346 */
/* 347 */
/* 348 */
/* 349 */
#define SYS_audit 350
#define SYS_auditon 351
/* 352 */
#define SYS_getauid 353
#define SYS_setauid 354
#define SYS_getaudit 355
#define SYS_setaudit 356
#define SYS_getaudit_addr 357
#define SYS_setaudit_addr 358
#define SYS_auditctl 359
/* 360 */
/* 361 */
#define SYS_kqueue 362
#define SYS_kevent 363
#define SYS_lchown 364
#define SYS_stack_snapshot 365
/* 366 */
/* 367 */
/* 368 */
/* 369 */
#define SYS_MAXSYSCALL 370
未使用の予約番号がいくつかあるが，370を最大値に約300強のシステムコールが存在する．
また，Mac OS Xでは，BSD互換レイヤより低位にmach用のシステムコール(trap)が定義されているらしい．Mac OS X Internalsによると，BSDシステムコールの10倍程度の数があるとのことである．
今週の参考書籍
Mac OS X Internals: Amit Singh
GNU Development Tools: 西田 亙
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