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mLine 101:
Line 101: − if (task_in_rseq(rseq_cs, TI_IP(core))) {+ − struct pid *tid = &item->threads[i];+ − pr_warn("The %d task is in rseq critical section. IP will be set to rseq abort handler addr\n",+ − tid->real);+ − if (!(rseq_cs->flags & RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL)) {+ − pr_warn("The %d task is in rseq critical section. IP will be set to rseq abort handler addr\n",+ − tid->real);+ − TI_IP(core) = rseq_cs->abort_ip;+ − if (item->pid->real == tid->real) {+ − compel_set_leader_ip(dmpi(item)->parasite_ctl, rseq_cs->abort_ip);+ − } else {+ − compel_set_thread_ip(dmpi(item)->thread_ctls[i], rseq_cs->abort_ip);+ − } +
→Executing inside critical section
The logic responsible for this is implemented in the <code>fixup_thread_rseq</code> function:
The logic responsible for this is implemented in the <code>fixup_thread_rseq</code> function:
<pre>
<pre>
if (task_in_rseq(rseq_cs, TI_IP(core))) {
struct pid *tid = &item->threads[i];
...
...
pr_warn("The %d task is in rseq critical section. IP will be set to rseq abort handler addr\n",
tid->real);
...
...
if (!(rseq_cs->flags & RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL)) {
pr_warn("The %d task is in rseq critical section. IP will be set to rseq abort handler addr\n",
tid->real);
TI_IP(core) = rseq_cs->abort_ip;
if (item->pid->real == tid->real) {
compel_set_leader_ip(dmpi(item)->parasite_ctl, rseq_cs->abort_ip);
} else {
compel_set_thread_ip(dmpi(item)->thread_ctls[i], rseq_cs->abort_ip);
}
}
}
}
}
</pre>
</pre>