README: step debug dynamic loader stub

Author: cirosantilli

README.adoc

@@ -2223,6 +2223,12 @@ which automatically finds unstripped shared libraries on the host for us.
 
 See also: https://stackoverflow.com/questions/8611194/debugging-shared-libraries-with-gdbserver/45252113#45252113
 
+=== gdbserver dynamic loader
+
+TODO: try to step debug the dynamic loader. Would be even easier if `starti` is available: https://stackoverflow.com/questions/10483544/stopping-at-the-first-machine-code-instruction-in-gdb
+
+Bibliography: https://stackoverflow.com/questions/20114565/gdb-step-into-dynamic-linkerld-so-code
+
 == CPU architecture
 
 The portability of the kernel and toolchains is amazing: change an option and most things magically work on completely different hardware.