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struct sigframe { char __user *pretcode; int sig; struct sigcontext sc; struct _fpstate fpstate; unsigned long extramask[_NSIG_WORDS-1]; char retcode[8]; }; struct rt_sigframe { char __user *pretcode; int sig; struct siginfo __user *pinfo; void __user *puc; struct siginfo info; struct ucontext uc; struct _fpstate fpstate; char retcode[8]; };