tools/test: add a program to check INT $0x80 behavior on amd64

[kib]

Cosmetics

[markj]

You could add it to tests/sys/arch/amd64 using PLAIN_TESTS_C, and it will run automatically. The test should just exit with a non-zero status if we do not get SIGBUS at the expected location.

[kib]

Move to tests/sys/arch.

There is something wrong/missing with the Makefile or the program itself:

root@r-freeb44:~ # kyua test -k /usr/tests/sys/arch/Kyuafile
amd64/int0x80:__test_cases_list__  ->  broken: Invalid header for test case list; expecting Content-Type for application/X-atf-tp version 1, got 'int $0x80 raises SIGBUS'  [0.000s]

Results file id is usr_tests_sys_arch.20260428-014145-017595
Results saved to /root/.kyua/store/results.usr_tests_sys_arch.20260428-014145-017595.db

0/1 passed (1 broken, 0 failed, 0 skipped)

[kib]

BTW does the addition requires patching etc/mtree/BSD.tests.dist? I do not see aarch subdir there.

[markj]

tests/sys/arch/amd64/Makefile

4

A "plain" test is just a standalone C program which exits with status 0 if the test(s) pass, and non-zero otherwise.

[kib]

PLAIN_TESTS_C

[markj]

Thank you.

In D56654#1298293, @kib wrote:

BTW does the addition requires patching etc/mtree/BSD.tests.dist? I do not see aarch subdir there.

Yes, I think so. I thought @andrew set it up so that this would not be necessary, but apparently not.