root/arch/x86/kernel/sigframe.h

INCLUDED FROM

#ifdef CONFIG_X86_32
struct sigframe {
        char __user *pretcode;
        int sig;
        struct sigcontext sc;
        /*
         * fpstate is unused. fpstate is moved/allocated after
         * retcode[] below. This movement allows to have the FP state and the
         * future state extensions (xsave) stay together.
         * And at the same time retaining the unused fpstate, prevents changing
         * the offset of extramask[] in the sigframe and thus prevent any
         * legacy application accessing/modifying it.
         */
        struct _fpstate fpstate_unused;
        unsigned long extramask[_NSIG_WORDS-1];
        char retcode[8];
        /* fp state follows here */
};

struct rt_sigframe {
        char __user *pretcode;
        int sig;
        struct siginfo __user *pinfo;
        void __user *puc;
        struct siginfo info;
        struct ucontext uc;
        char retcode[8];
        /* fp state follows here */
};
#else
struct rt_sigframe {
        char __user *pretcode;
        struct ucontext uc;
        struct siginfo info;
        /* fp state follows here */
};

int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                sigset_t *set, struct pt_regs *regs);
int ia32_setup_frame(int sig, struct k_sigaction *ka,
                sigset_t *set, struct pt_regs *regs);
#endif