This call is made by a new task to its bootstrap port to get its startup ports and information.
Implemented regularely by the exec server
(exec/exec.c:S_exec_startup_get_info), and also translators based
on libdiskfs
(libdiskfs/boot-start.c:diskfs_S_exec_startup_get_info) because these look
like an execserver to the execserver itself; it makes this call (as does any
task) to get its state.
Used solely in glibc's process startup
(hurd/hurdstartup.c:_hurd_startup).