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

--

SIG_BLOCK
SIG_SETMASK

#define ucontext(member)	offsetof (ucontext_t, member)
#define mcontext(member)	ucontext (uc_mcontext.member)
#define mreg(reg)		mcontext (gregs[REG_##reg])

oLINK		ucontext (uc_link)
oSS_SP		ucontext (uc_stack.ss_sp)
oSS_SIZE	ucontext (uc_stack.ss_size)
oGS		mreg (GS)
oFS		mreg (FS)
oEDI		mreg (EDI)
oESI		mreg (ESI)
oEBP		mreg (EBP)
oESP		mreg (ESP)
oEBX		mreg (EBX)
oEIP		mreg (EIP)
oSCRATCH1	mreg (EAX)
oSCRATCH2	mreg (ECX)
oSCRATCH3	mreg (EDX)
oFPREGS		mcontext (fpregs)
oSIGMASK	ucontext (uc_sigmask)
oFPREGSMEM	ucontext (__fpregs_mem)
oSSP		ucontext (__ssp)