Linux: Generate syscall numbers from kernel sources

... except for hexagon which seems to have something odd going on with
syscall numbers >1000.

Also do not test the validity of the values because libc is regularly
missing newer syscall numbers.

For those archs which use the newer unified asm-generic/unistd.h numbers
we generate too many constants because

    a) some syscalls are optional
    b) we cannot perform the necessary tests without significant effort.

This is not too problematic because the worst that can happen is ENOSYS
which also happens when newer syscalls are executed on older kernels.

Author: Julian Orth

libc-test/build.rs

@@ -3,7 +3,8 @@
 extern crate cc;
 extern crate ctest;
 
-use std::env;
+use std::collections::HashSet;
+use std::{env, fs};
 
 fn do_cc() {
     let target = env::var("TARGET").unwrap();
@@ -2495,7 +2496,17 @@ fn test_linux(target: &str) {
         }
     });
 
+    let syscall_consts = fs::read_to_string("src/linux_syscall_constants")
+        .unwrap()
+        .lines()
+        .map(|l| l.to_owned())
+        .collect::<HashSet<_>>();
+
     cfg.skip_const(move |name| {
+        if syscall_consts.contains(name) {
+            return true;
+        }
+
         match name {
             // These constants are not available if gnu headers have been included
             // and can therefore not be tested here

libc-test/src/linux_syscall_constants

@@ -0,0 +1 @@
+../../src/unix/linux_like/linux/kernel/syscall_constants

src/unix/linux_like/linux/kernel/b32/arm/syscalls.rs

@@ -1,4 +1,5 @@
-// Syscall table
+// This file was generated via generate_syscalls.sh. Do not edit it manually.
+
 pub const SYS_restart_syscall: ::c_long = 0;
 pub const SYS_exit: ::c_long = 1;
 pub const SYS_fork: ::c_long = 2;
@@ -352,3 +353,41 @@ pub const SYS_pkey_mprotect: ::c_long = 394;
 pub const SYS_pkey_alloc: ::c_long = 395;
 pub const SYS_pkey_free: ::c_long = 396;
 pub const SYS_statx: ::c_long = 397;
+pub const SYS_rseq: ::c_long = 398;
+pub const SYS_io_pgetevents: ::c_long = 399;
+pub const SYS_migrate_pages: ::c_long = 400;
+pub const SYS_kexec_file_load: ::c_long = 401;
+pub const SYS_clock_gettime64: ::c_long = 403;
+pub const SYS_clock_settime64: ::c_long = 404;
+pub const SYS_clock_adjtime64: ::c_long = 405;
+pub const SYS_clock_getres_time64: ::c_long = 406;
+pub const SYS_clock_nanosleep_time64: ::c_long = 407;
+pub const SYS_timer_gettime64: ::c_long = 408;
+pub const SYS_timer_settime64: ::c_long = 409;
+pub const SYS_timerfd_gettime64: ::c_long = 410;
+pub const SYS_timerfd_settime64: ::c_long = 411;
+pub const SYS_utimensat_time64: ::c_long = 412;
+pub const SYS_pselect6_time64: ::c_long = 413;
+pub const SYS_ppoll_time64: ::c_long = 414;
+pub const SYS_io_pgetevents_time64: ::c_long = 416;
+pub const SYS_recvmmsg_time64: ::c_long = 417;
+pub const SYS_mq_timedsend_time64: ::c_long = 418;
+pub const SYS_mq_timedreceive_time64: ::c_long = 419;
+pub const SYS_semtimedop_time64: ::c_long = 420;
+pub const SYS_rt_sigtimedwait_time64: ::c_long = 421;
+pub const SYS_futex_time64: ::c_long = 422;
+pub const SYS_sched_rr_get_interval_time64: ::c_long = 423;
+pub const SYS_pidfd_send_signal: ::c_long = 424;
+pub const SYS_io_uring_setup: ::c_long = 425;
+pub const SYS_io_uring_enter: ::c_long = 426;
+pub const SYS_io_uring_register: ::c_long = 427;
+pub const SYS_open_tree: ::c_long = 428;
+pub const SYS_move_mount: ::c_long = 429;
+pub const SYS_fsopen: ::c_long = 430;
+pub const SYS_fsconfig: ::c_long = 431;
+pub const SYS_fsmount: ::c_long = 432;
+pub const SYS_fspick: ::c_long = 433;
+pub const SYS_pidfd_open: ::c_long = 434;
+pub const SYS_clone3: ::c_long = 435;
+pub const SYS_openat2: ::c_long = 437;
+pub const SYS_pidfd_getfd: ::c_long = 438;

src/unix/linux_like/linux/kernel/b32/mips/syscalls.rs

@@ -1,3 +1,5 @@
+// This file was generated via generate_syscalls.sh. Do not edit it manually.
+
 pub const SYS_syscall: ::c_long = 4000 + 0;
 pub const SYS_exit: ::c_long = 4000 + 1;
 pub const SYS_fork: ::c_long = 4000 + 2;
@@ -16,6 +18,7 @@ pub const SYS_mknod: ::c_long = 4000 + 14;
 pub const SYS_chmod: ::c_long = 4000 + 15;
 pub const SYS_lchown: ::c_long = 4000 + 16;
 pub const SYS_break: ::c_long = 4000 + 17;
+pub const SYS_unused18: ::c_long = 4000 + 18;
 pub const SYS_lseek: ::c_long = 4000 + 19;
 pub const SYS_getpid: ::c_long = 4000 + 20;
 pub const SYS_mount: ::c_long = 4000 + 21;
@@ -25,6 +28,7 @@ pub const SYS_getuid: ::c_long = 4000 + 24;
 pub const SYS_stime: ::c_long = 4000 + 25;
 pub const SYS_ptrace: ::c_long = 4000 + 26;
 pub const SYS_alarm: ::c_long = 4000 + 27;
+pub const SYS_unused28: ::c_long = 4000 + 28;
 pub const SYS_pause: ::c_long = 4000 + 29;
 pub const SYS_utime: ::c_long = 4000 + 30;
 pub const SYS_stty: ::c_long = 4000 + 31;
@@ -55,6 +59,7 @@ pub const SYS_fcntl: ::c_long = 4000 + 55;
 pub const SYS_mpx: ::c_long = 4000 + 56;
 pub const SYS_setpgid: ::c_long = 4000 + 57;
 pub const SYS_ulimit: ::c_long = 4000 + 58;
+pub const SYS_unused59: ::c_long = 4000 + 59;
 pub const SYS_umask: ::c_long = 4000 + 60;
 pub const SYS_chroot: ::c_long = 4000 + 61;
 pub const SYS_ustat: ::c_long = 4000 + 62;
@@ -77,7 +82,9 @@ pub const SYS_gettimeofday: ::c_long = 4000 + 78;
 pub const SYS_settimeofday: ::c_long = 4000 + 79;
 pub const SYS_getgroups: ::c_long = 4000 + 80;
 pub const SYS_setgroups: ::c_long = 4000 + 81;
+pub const SYS_reserved82: ::c_long = 4000 + 82;
 pub const SYS_symlink: ::c_long = 4000 + 83;
+pub const SYS_unused84: ::c_long = 4000 + 84;
 pub const SYS_readlink: ::c_long = 4000 + 85;
 pub const SYS_uselib: ::c_long = 4000 + 86;
 pub const SYS_swapon: ::c_long = 4000 + 87;
@@ -102,6 +109,7 @@ pub const SYS_getitimer: ::c_long = 4000 + 105;
 pub const SYS_stat: ::c_long = 4000 + 106;
 pub const SYS_lstat: ::c_long = 4000 + 107;
 pub const SYS_fstat: ::c_long = 4000 + 108;
+pub const SYS_unused109: ::c_long = 4000 + 109;
 pub const SYS_iopl: ::c_long = 4000 + 110;
 pub const SYS_vhangup: ::c_long = 4000 + 111;
 pub const SYS_idle: ::c_long = 4000 + 112;
@@ -142,6 +150,7 @@ pub const SYS_writev: ::c_long = 4000 + 146;
 pub const SYS_cacheflush: ::c_long = 4000 + 147;
 pub const SYS_cachectl: ::c_long = 4000 + 148;
 pub const SYS_sysmips: ::c_long = 4000 + 149;
+pub const SYS_unused150: ::c_long = 4000 + 150;
 pub const SYS_getsid: ::c_long = 4000 + 151;
 pub const SYS_fdatasync: ::c_long = 4000 + 152;
 pub const SYS__sysctl: ::c_long = 4000 + 153;
@@ -212,6 +221,7 @@ pub const SYS_mincore: ::c_long = 4000 + 217;
 pub const SYS_madvise: ::c_long = 4000 + 218;
 pub const SYS_getdents64: ::c_long = 4000 + 219;
 pub const SYS_fcntl64: ::c_long = 4000 + 220;
+pub const SYS_reserved221: ::c_long = 4000 + 221;
 pub const SYS_gettid: ::c_long = 4000 + 222;
 pub const SYS_readahead: ::c_long = 4000 + 223;
 pub const SYS_setxattr: ::c_long = 4000 + 224;
@@ -269,7 +279,6 @@ pub const SYS_mq_notify: ::c_long = 4000 + 275;
 pub const SYS_mq_getsetattr: ::c_long = 4000 + 276;
 pub const SYS_vserver: ::c_long = 4000 + 277;
 pub const SYS_waitid: ::c_long = 4000 + 278;
-/* pub const SYS_sys_setaltroot: ::c_long = 4000 + 279; */
 pub const SYS_add_key: ::c_long = 4000 + 280;
 pub const SYS_request_key: ::c_long = 4000 + 281;
 pub const SYS_keyctl: ::c_long = 4000 + 282;
@@ -357,3 +366,49 @@ pub const SYS_pkey_mprotect: ::c_long = 4000 + 363;
 pub const SYS_pkey_alloc: ::c_long = 4000 + 364;
 pub const SYS_pkey_free: ::c_long = 4000 + 365;
 pub const SYS_statx: ::c_long = 4000 + 366;
+pub const SYS_rseq: ::c_long = 4000 + 367;
+pub const SYS_io_pgetevents: ::c_long = 4000 + 368;
+pub const SYS_semget: ::c_long = 4000 + 393;
+pub const SYS_semctl: ::c_long = 4000 + 394;
+pub const SYS_shmget: ::c_long = 4000 + 395;
+pub const SYS_shmctl: ::c_long = 4000 + 396;
+pub const SYS_shmat: ::c_long = 4000 + 397;
+pub const SYS_shmdt: ::c_long = 4000 + 398;
+pub const SYS_msgget: ::c_long = 4000 + 399;
+pub const SYS_msgsnd: ::c_long = 4000 + 400;
+pub const SYS_msgrcv: ::c_long = 4000 + 401;
+pub const SYS_msgctl: ::c_long = 4000 + 402;
+pub const SYS_clock_gettime64: ::c_long = 4000 + 403;
+pub const SYS_clock_settime64: ::c_long = 4000 + 404;
+pub const SYS_clock_adjtime64: ::c_long = 4000 + 405;
+pub const SYS_clock_getres_time64: ::c_long = 4000 + 406;
+pub const SYS_clock_nanosleep_time64: ::c_long = 4000 + 407;
+pub const SYS_timer_gettime64: ::c_long = 4000 + 408;
+pub const SYS_timer_settime64: ::c_long = 4000 + 409;
+pub const SYS_timerfd_gettime64: ::c_long = 4000 + 410;
+pub const SYS_timerfd_settime64: ::c_long = 4000 + 411;
+pub const SYS_utimensat_time64: ::c_long = 4000 + 412;
+pub const SYS_pselect6_time64: ::c_long = 4000 + 413;
+pub const SYS_ppoll_time64: ::c_long = 4000 + 414;
+pub const SYS_io_pgetevents_time64: ::c_long = 4000 + 416;
+pub const SYS_recvmmsg_time64: ::c_long = 4000 + 417;
+pub const SYS_mq_timedsend_time64: ::c_long = 4000 + 418;
+pub const SYS_mq_timedreceive_time64: ::c_long = 4000 + 419;
+pub const SYS_semtimedop_time64: ::c_long = 4000 + 420;
+pub const SYS_rt_sigtimedwait_time64: ::c_long = 4000 + 421;
+pub const SYS_futex_time64: ::c_long = 4000 + 422;
+pub const SYS_sched_rr_get_interval_time64: ::c_long = 4000 + 423;
+pub const SYS_pidfd_send_signal: ::c_long = 4000 + 424;
+pub const SYS_io_uring_setup: ::c_long = 4000 + 425;
+pub const SYS_io_uring_enter: ::c_long = 4000 + 426;
+pub const SYS_io_uring_register: ::c_long = 4000 + 427;
+pub const SYS_open_tree: ::c_long = 4000 + 428;
+pub const SYS_move_mount: ::c_long = 4000 + 429;
+pub const SYS_fsopen: ::c_long = 4000 + 430;
+pub const SYS_fsconfig: ::c_long = 4000 + 431;
+pub const SYS_fsmount: ::c_long = 4000 + 432;
+pub const SYS_fspick: ::c_long = 4000 + 433;
+pub const SYS_pidfd_open: ::c_long = 4000 + 434;
+pub const SYS_clone3: ::c_long = 4000 + 435;
+pub const SYS_openat2: ::c_long = 4000 + 437;
+pub const SYS_pidfd_getfd: ::c_long = 4000 + 438;

src/unix/linux_like/linux/kernel/b32/powerpc/syscalls.rs

@@ -1,3 +1,5 @@
+// This file was generated via generate_syscalls.sh. Do not edit it manually.
+
 pub const SYS_restart_syscall: ::c_long = 0;
 pub const SYS_exit: ::c_long = 1;
 pub const SYS_fork: ::c_long = 2;
@@ -371,3 +373,49 @@ pub const SYS_statx: ::c_long = 383;
 pub const SYS_pkey_alloc: ::c_long = 384;
 pub const SYS_pkey_free: ::c_long = 385;
 pub const SYS_pkey_mprotect: ::c_long = 386;
+pub const SYS_rseq: ::c_long = 387;
+pub const SYS_io_pgetevents: ::c_long = 388;
+pub const SYS_semget: ::c_long = 393;
+pub const SYS_semctl: ::c_long = 394;
+pub const SYS_shmget: ::c_long = 395;
+pub const SYS_shmctl: ::c_long = 396;
+pub const SYS_shmat: ::c_long = 397;
+pub const SYS_shmdt: ::c_long = 398;
+pub const SYS_msgget: ::c_long = 399;
+pub const SYS_msgsnd: ::c_long = 400;
+pub const SYS_msgrcv: ::c_long = 401;
+pub const SYS_msgctl: ::c_long = 402;
+pub const SYS_clock_gettime64: ::c_long = 403;
+pub const SYS_clock_settime64: ::c_long = 404;
+pub const SYS_clock_adjtime64: ::c_long = 405;
+pub const SYS_clock_getres_time64: ::c_long = 406;
+pub const SYS_clock_nanosleep_time64: ::c_long = 407;
+pub const SYS_timer_gettime64: ::c_long = 408;
+pub const SYS_timer_settime64: ::c_long = 409;
+pub const SYS_timerfd_gettime64: ::c_long = 410;
+pub const SYS_timerfd_settime64: ::c_long = 411;
+pub const SYS_utimensat_time64: ::c_long = 412;
+pub const SYS_pselect6_time64: ::c_long = 413;
+pub const SYS_ppoll_time64: ::c_long = 414;
+pub const SYS_io_pgetevents_time64: ::c_long = 416;
+pub const SYS_recvmmsg_time64: ::c_long = 417;
+pub const SYS_mq_timedsend_time64: ::c_long = 418;
+pub const SYS_mq_timedreceive_time64: ::c_long = 419;
+pub const SYS_semtimedop_time64: ::c_long = 420;
+pub const SYS_rt_sigtimedwait_time64: ::c_long = 421;
+pub const SYS_futex_time64: ::c_long = 422;
+pub const SYS_sched_rr_get_interval_time64: ::c_long = 423;
+pub const SYS_pidfd_send_signal: ::c_long = 424;
+pub const SYS_io_uring_setup: ::c_long = 425;
+pub const SYS_io_uring_enter: ::c_long = 426;
+pub const SYS_io_uring_register: ::c_long = 427;
+pub const SYS_open_tree: ::c_long = 428;
+pub const SYS_move_mount: ::c_long = 429;
+pub const SYS_fsopen: ::c_long = 430;
+pub const SYS_fsconfig: ::c_long = 431;
+pub const SYS_fsmount: ::c_long = 432;
+pub const SYS_fspick: ::c_long = 433;
+pub const SYS_pidfd_open: ::c_long = 434;
+pub const SYS_clone3: ::c_long = 435;
+pub const SYS_openat2: ::c_long = 437;
+pub const SYS_pidfd_getfd: ::c_long = 438;

src/unix/linux_like/linux/kernel/b32/sparc/syscalls.rs

@@ -1,3 +1,5 @@
+// This file was generated via generate_syscalls.sh. Do not edit it manually.
+
 pub const SYS_restart_syscall: ::c_long = 0;
 pub const SYS_exit: ::c_long = 1;
 pub const SYS_fork: ::c_long = 2;
@@ -263,6 +265,7 @@ pub const SYS_timer_gettime: ::c_long = 263;
 pub const SYS_timer_getoverrun: ::c_long = 264;
 pub const SYS_timer_delete: ::c_long = 265;
 pub const SYS_timer_create: ::c_long = 266;
+pub const SYS_vserver: ::c_long = 267;
 pub const SYS_io_setup: ::c_long = 268;
 pub const SYS_io_destroy: ::c_long = 269;
 pub const SYS_io_submit: ::c_long = 270;
@@ -356,3 +359,51 @@ pub const SYS_copy_file_range: ::c_long = 357;
 pub const SYS_preadv2: ::c_long = 358;
 pub const SYS_pwritev2: ::c_long = 359;
 pub const SYS_statx: ::c_long = 360;
+pub const SYS_io_pgetevents: ::c_long = 361;
+pub const SYS_pkey_mprotect: ::c_long = 362;
+pub const SYS_pkey_alloc: ::c_long = 363;
+pub const SYS_pkey_free: ::c_long = 364;
+pub const SYS_rseq: ::c_long = 365;
+pub const SYS_semget: ::c_long = 393;
+pub const SYS_semctl: ::c_long = 394;
+pub const SYS_shmget: ::c_long = 395;
+pub const SYS_shmctl: ::c_long = 396;
+pub const SYS_shmat: ::c_long = 397;
+pub const SYS_shmdt: ::c_long = 398;
+pub const SYS_msgget: ::c_long = 399;
+pub const SYS_msgsnd: ::c_long = 400;
+pub const SYS_msgrcv: ::c_long = 401;
+pub const SYS_msgctl: ::c_long = 402;
+pub const SYS_clock_gettime64: ::c_long = 403;
+pub const SYS_clock_settime64: ::c_long = 404;
+pub const SYS_clock_adjtime64: ::c_long = 405;
+pub const SYS_clock_getres_time64: ::c_long = 406;
+pub const SYS_clock_nanosleep_time64: ::c_long = 407;
+pub const SYS_timer_gettime64: ::c_long = 408;
+pub const SYS_timer_settime64: ::c_long = 409;
+pub const SYS_timerfd_gettime64: ::c_long = 410;
+pub const SYS_timerfd_settime64: ::c_long = 411;
+pub const SYS_utimensat_time64: ::c_long = 412;
+pub const SYS_pselect6_time64: ::c_long = 413;
+pub const SYS_ppoll_time64: ::c_long = 414;
+pub const SYS_io_pgetevents_time64: ::c_long = 416;
+pub const SYS_recvmmsg_time64: ::c_long = 417;
+pub const SYS_mq_timedsend_time64: ::c_long = 418;
+pub const SYS_mq_timedreceive_time64: ::c_long = 419;
+pub const SYS_semtimedop_time64: ::c_long = 420;
+pub const SYS_rt_sigtimedwait_time64: ::c_long = 421;
+pub const SYS_futex_time64: ::c_long = 422;
+pub const SYS_sched_rr_get_interval_time64: ::c_long = 423;
+pub const SYS_pidfd_send_signal: ::c_long = 424;
+pub const SYS_io_uring_setup: ::c_long = 425;
+pub const SYS_io_uring_enter: ::c_long = 426;
+pub const SYS_io_uring_register: ::c_long = 427;
+pub const SYS_open_tree: ::c_long = 428;
+pub const SYS_move_mount: ::c_long = 429;
+pub const SYS_fsopen: ::c_long = 430;
+pub const SYS_fsconfig: ::c_long = 431;
+pub const SYS_fsmount: ::c_long = 432;
+pub const SYS_fspick: ::c_long = 433;
+pub const SYS_pidfd_open: ::c_long = 434;
+pub const SYS_openat2: ::c_long = 437;
+pub const SYS_pidfd_getfd: ::c_long = 438;

src/unix/linux_like/linux/kernel/b32/x86/syscalls.rs

@@ -1,4 +1,5 @@
-// Syscall table
+// This file was generated via generate_syscalls.sh. Do not edit it manually.
+
 pub const SYS_restart_syscall: ::c_long = 0;
 pub const SYS_exit: ::c_long = 1;
 pub const SYS_fork: ::c_long = 2;
@@ -379,3 +380,50 @@ pub const SYS_pkey_mprotect: ::c_long = 380;
 pub const SYS_pkey_alloc: ::c_long = 381;
 pub const SYS_pkey_free: ::c_long = 382;
 pub const SYS_statx: ::c_long = 383;
+pub const SYS_arch_prctl: ::c_long = 384;
+pub const SYS_io_pgetevents: ::c_long = 385;
+pub const SYS_rseq: ::c_long = 386;
+pub const SYS_semget: ::c_long = 393;
+pub const SYS_semctl: ::c_long = 394;
+pub const SYS_shmget: ::c_long = 395;
+pub const SYS_shmctl: ::c_long = 396;
+pub const SYS_shmat: ::c_long = 397;
+pub const SYS_shmdt: ::c_long = 398;
+pub const SYS_msgget: ::c_long = 399;
+pub const SYS_msgsnd: ::c_long = 400;
+pub const SYS_msgrcv: ::c_long = 401;
+pub const SYS_msgctl: ::c_long = 402;
+pub const SYS_clock_gettime64: ::c_long = 403;
+pub const SYS_clock_settime64: ::c_long = 404;
+pub const SYS_clock_adjtime64: ::c_long = 405;
+pub const SYS_clock_getres_time64: ::c_long = 406;
+pub const SYS_clock_nanosleep_time64: ::c_long = 407;
+pub const SYS_timer_gettime64: ::c_long = 408;
+pub const SYS_timer_settime64: ::c_long = 409;
+pub const SYS_timerfd_gettime64: ::c_long = 410;
+pub const SYS_timerfd_settime64: ::c_long = 411;
+pub const SYS_utimensat_time64: ::c_long = 412;
+pub const SYS_pselect6_time64: ::c_long = 413;
+pub const SYS_ppoll_time64: ::c_long = 414;
+pub const SYS_io_pgetevents_time64: ::c_long = 416;
+pub const SYS_recvmmsg_time64: ::c_long = 417;
+pub const SYS_mq_timedsend_time64: ::c_long = 418;
+pub const SYS_mq_timedreceive_time64: ::c_long = 419;
+pub const SYS_semtimedop_time64: ::c_long = 420;
+pub const SYS_rt_sigtimedwait_time64: ::c_long = 421;
+pub const SYS_futex_time64: ::c_long = 422;
+pub const SYS_sched_rr_get_interval_time64: ::c_long = 423;
+pub const SYS_pidfd_send_signal: ::c_long = 424;
+pub const SYS_io_uring_setup: ::c_long = 425;
+pub const SYS_io_uring_enter: ::c_long = 426;
+pub const SYS_io_uring_register: ::c_long = 427;
+pub const SYS_open_tree: ::c_long = 428;
+pub const SYS_move_mount: ::c_long = 429;
+pub const SYS_fsopen: ::c_long = 430;
+pub const SYS_fsconfig: ::c_long = 431;
+pub const SYS_fsmount: ::c_long = 432;
+pub const SYS_fspick: ::c_long = 433;
+pub const SYS_pidfd_open: ::c_long = 434;
+pub const SYS_clone3: ::c_long = 435;
+pub const SYS_openat2: ::c_long = 437;
+pub const SYS_pidfd_getfd: ::c_long = 438;