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#include <stddef.h>
#include <signal.h>
#include <sys/ucontext.h>
--
SIG_BLOCK
SIG_SETMASK
-- XXX Do these correspond to some struct?
_FRAME_BACKCHAIN 0
_FRAME_LR_SAVE 4
_FRAME_PARM_SAVE1 8
_FRAME_PARM_SAVE2 12
_FRAME_PARM_SAVE3 16
_FRAME_PARM_SAVE4 20
-- Offsets in ucontext_t.
#define ucontext(member) offsetof (ucontext_t, member)
_UC_LINK ucontext (uc_link)
_UC_STACK_SP ucontext (uc_stack.ss_sp)
_UC_STACK_SIZE ucontext (uc_stack.ss_size)
_UC_REGS_PTR ucontext (uc_mcontext.uc_regs)
_UC_SIGMASK ucontext (uc_sigmask)
_UC_REG_SPACE ucontext (uc_reg_space)
-- Offsets in mcontext_t.
#define mcontext(member) offsetof (mcontext_t, member)
_UC_GREGS mcontext (gregs)
_UC_FREGS mcontext (fpregs)
_UC_VREGS mcontext (vrregs)
_UC_VREGS mcontext (vrregs)
_UC_VSCR mcontext (vrregs.vscr)
_UC_VRSAVE mcontext (vrregs.vrsave)
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