root/include/asm-parisc/rt_sigframe.h

#ifndef _ASM_PARISC_RT_SIGFRAME_H
#define _ASM_PARISC_RT_SIGFRAME_H

#define SIGRETURN_TRAMP 4
#define SIGRESTARTBLOCK_TRAMP 5 
#define TRAMP_SIZE (SIGRETURN_TRAMP + SIGRESTARTBLOCK_TRAMP)

struct rt_sigframe {
        /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c 
                Secondary to that it must protect the ERESTART_RESTARTBLOCK
                trampoline we left on the stack (we were bad and didn't 
                change sp so we could run really fast.) */
        unsigned int tramp[TRAMP_SIZE];
        struct siginfo info;
        struct ucontext uc;
};

#define SIGFRAME                128
#define FUNCTIONCALLFRAME       96
#define PARISC_RT_SIGFRAME_SIZE                                 \
        (((sizeof(struct rt_sigframe) + FUNCTIONCALLFRAME) + SIGFRAME) & -SIGFRAME)

#endif