D30035.id88730.diff
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	diff --git a/sys/amd64/linux/linux.h b/sys/amd64/linux/linux.h
	--- a/sys/amd64/linux/linux.h
	+++ b/sys/amd64/linux/linux.h
	@@ -431,6 +431,7 @@
	#define LINUX_ARCH_SET_FS 0x1002
	#define LINUX_ARCH_GET_FS 0x1003
	#define LINUX_ARCH_GET_GS 0x1004
	+#define LINUX_ARCH_CET_STATUS 0x3001

	#define linux_copyout_rusage(r, u) copyout(r, u, sizeof(*r))

	diff --git a/sys/amd64/linux/linux_machdep.c b/sys/amd64/linux/linux_machdep.c
	--- a/sys/amd64/linux/linux_machdep.c
	+++ b/sys/amd64/linux/linux_machdep.c
	@@ -242,6 +242,7 @@
	int
	linux_arch_prctl(struct thread td, struct linux_arch_prctl_args args)
	{
	+ unsigned long long cet[3];
	struct pcb *pcb;
	int error;

	@@ -275,7 +276,12 @@
	error = copyout(&pcb->pcb_gsbase, PTRIN(args->addr),
	sizeof(args->addr));
	break;
	+ case LINUX_ARCH_CET_STATUS:
	+ memset(cet, 0, sizeof(cet));
	+ error = copyout(&cet, PTRIN(args->addr), sizeof(cet));
	+ break;
	default:
	+ linux_msg(td, "unsupported arch_prctl code %#x", args->code);
	error = EINVAL;
	}
	return (error);