#include <hurd/signal.h>
#include <signal.h>

--

HURD_SIGSTATE__SIGALTSTACK__OFFSET	offsetof(struct hurd_sigstate, sigaltstack)

SIGALTSTACK__SS_SP__OFFSET		offsetof(stack_t, ss_sp)
SIGALTSTACK__SS_SIZE__OFFSET		offsetof(stack_t, ss_size)
SIGALTSTACK__SS_FLAGS__OFFSET		offsetof(stack_t, ss_flags)