#include <stddef.h>
#include <signal.h>
#include <sys/ucontext.h>

--

SIG_SETMASK

#define ucontext(member)	offsetof (ucontext_t, member)
#define mcontext(member)	ucontext (uc_mcontext.member)

oLINK		ucontext (uc_link)
oSS_SP		ucontext (uc_stack.ss_sp)
oSS_SIZE	ucontext (uc_stack.ss_size)
oGREGS		mcontext (gregs)
oSP		mcontext (gregs[R_SP])
oPC		mcontext (gregs[R_PC])
oFPREGS		mcontext (fpregs)
oFP2		mcontext (fpregs.f_fpregs[2])
oSIGMASK	ucontext (uc_sigmask)