Add generic mg_health report for mdash

tutorials/stm32/nucleo-h723zg/minimal/stacktrace.gdb

@@ -0,0 +1,14 @@
+set architecture armv7e-m
+target remote 127.0.0.1:3334
+set $cfsr = *(unsigned int *) 0xe000ed28
+set $hfsr = *(unsigned int *) 0xe000ed2c
+set $bfar = *(unsigned int *) 0xe000ed38
+set $abfsr = *(unsigned int *) 0xe000efa8
+printf "Fault registers: CFSR=0x%08x HFSR=0x%08x BFAR=0x%08x ABFSR=0x%08x\n", $cfsr, $hfsr, $bfar, $abfsr
+if $cfsr & 0x00000400
+  printf "Imprecise BusFault: exception PC is asynchronous; offending instruction may be earlier.\n"
+end
+if $cfsr & 0x00008000
+  printf "BFAR valid: 0x%08x\n", $bfar
+end
+bt