$ cat a.c
void t(){ __builtin_trap(); }
void r(){ t(); }
void a(){ r(); }
void p(){ a(); }
int main() { p(); }
$ sudo gcc a.c -o /a -ggdb3
$ /a
Illegal instruction
$ journalctl -r | head -n 30
-- Journal begins at Mon 2021-08-30 17:56:01 BST, ends at Sun 2021-11-28 21:00:22 GMT. --
ноя 28 21:00:22 nz systemd[1]: [email protected]: Deactivated successfully.
ноя 28 21:00:22 nz systemd-coredump[3968807]: Process 3968795 (a) of user 1000 dumped core.

                                                 Found module linux-vdso.so.1 with build-id: e1fae3fd1e8fbc9a72b8ae8d16fdc9c059c8da47
                                                 Found module ld-linux-x86-64.so.2 with build-id: b60b89b6921053c086d6640f5ecc02035efc1570
                                                 Found module libc.so.6 with build-id: 30f69e92c5e710c15fcda2dec8c5316b040db347
                                                 Found module a without build-id.
                                                 Stack trace of thread 3968795:
                                                 #0  0x000000000040110a t (a + 0x110a)
                                                 #1  0x000000000040111a r (a + 0x111a)
                                                 #2  0x000000000040112b a (a + 0x112b)
                                                 #3  0x000000000040113c p (a + 0x113c)
                                                 #4  0x000000000040114d main (a + 0x114d)
                                                 #5  0x00007f79e16bc780 __libc_start_main (libc.so.6 + 0x27780)
                                                 #6  0x000000000040104a _start (a + 0x104a)