<p></p>
<blockquote>
<p dir="auto">I've tested this on gcc401.fsffrance.org: Linux gcc401 5.15.0+ #348 SMP PREEMPT Thu Dec 30 13:46:50 CST 2021 loongarch64 GNU/Linux</p>
<p dir="auto">Testsuite summary:</p>
<p dir="auto">FAIL: bpf-success.gen FAIL: bpf-success-v.gen FAIL: clone3-success.gen FAIL: clone3-success-Xabbrev.gen FAIL: clone3-success-Xraw.gen FAIL: clone3-success-Xverbose.gen FAIL: landlock_create_ruleset-success.gen FAIL: landlock_create_ruleset-success-y.gen FAIL: prctl-fp-mode.gen FAIL: prctl-spec-inject.gen FAIL: prlimit64-success.gen FAIL: prlimit64-success--pidns-translation.gen FAIL: quotactl-success.gen FAIL: quotactl-success-v.gen FAIL: quotactl-xfs-success.gen FAIL: quotactl-xfs-success-v.gen FAIL: seccomp_get_notif_sizes-success.gen FAIL: bpf-success-long-y FAIL: qual_fault-exit_group FAIL: syslog-success FAIL: poke-ptrace FAIL: poke-unaligned FAIL: printpath-umovestr-legacy FAIL: printstrn-umoven-legacy FAIL: qual_fault FAIL: qual_inject-error-signal FAIL: qual_inject-retval</p>
<p dir="auto">In other words, all tests based on syscall tampering are failing there.</p>
<p dir="auto">Assuming that src/linux/loongarch64/set_scno.c and src/linux/loongarch64/set_error.c are correct, the kernel seems to be missing syscall tampering support.</p>
</blockquote>
<p dir="auto">Okay... this is the same result I've been seeing all the time (and exactly why I haven't pushed the <code>xlat</code> changes recently).</p>
<p dir="auto">It indeed seems ptrace functionality is missing, judging from <a href="https://github.com/loongson/linux/blob/78d3641f1f61866cc5ec7460af65d2530c17a202/arch/loongarch/kernel/ptrace.c">the latest kernel source</a>. Maybe <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/users/chenhuacai/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/chenhuacai">@chenhuacai</a> could implement this in next revision of loongarch-next series?</p>

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