Hi,

the diff below adds DT_FA_PROFILE and DT_FA_STATIC defines for arm64
to skip the probe context frames.

Here is how a typical arm64 stack trace looks with and without diff:

dt_pcb_ring_get+0x130
dt_prov_profile_enter+0x90
hardclock+0x1b0
agtimer_intr+0xa4
ampintc_irq_handler+0x1c0
arm_cpu_irq+0x34
handle_el1h_irq+0x70
sched_idle+0x294        <-- Diff skips everything above this
sched_idle+0x294
proc_trampoline+0x14

ok?

Index: dt_dev.c
===================================================================
RCS file: /mount/openbsd/cvs/src/sys/dev/dt/dt_dev.c,v
retrieving revision 1.14
diff -u -p -r1.14 dt_dev.c
--- dt_dev.c    22 May 2021 21:25:38 -0000      1.14
+++ dt_dev.c    9 Jun 2021 20:57:14 -0000
@@ -56,6 +56,9 @@
 #if defined(__amd64__)
 #define DT_FA_PROFILE  5
 #define DT_FA_STATIC   2
+#elif defined(__arm64__)
+#define DT_FA_PROFILE  7
+#define DT_FA_STATIC   2
 #elif defined(__powerpc64__)
 #define DT_FA_PROFILE  6
 #define DT_FA_STATIC   2

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