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#include <inttypes.h>
#include <signal.h>
#include <stddef.h>
#include <sys/ucontext.h>
SIG_BLOCK
SIG_SETMASK
-- sizeof(sigset_t) expected by kernel: see comment in ARC sigaction.c for details
_NSIG8 (_NSIG / 8)
-- Offsets of the fields in the ucontext_t structure.
#define ucontext(member) offsetof (ucontext_t, member)
UCONTEXT_FLAGS ucontext (__uc_flags)
UCONTEXT_LINK ucontext (uc_link)
UCONTEXT_STACK ucontext (uc_stack)
UCONTEXT_MCONTEXT ucontext (uc_mcontext)
UCONTEXT_SIGMASK ucontext (uc_sigmask)
UCONTEXT_SIZE sizeof (ucontext_t)
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