uclibc-ng/libc/sysdeps/linux/common/bits/kernel_sigaction.h

#ifndef _BITS_SIGACTION_STRUCT_H
#define _BITS_SIGACTION_STRUCT_H

/* This file provides whatever this particular arch's kernel thinks
 * the sigaction struct should look like... */

#undef NO_OLD_SIGACTION

#if defined(__mips__)
/* We have libc/sysdeps/linux/mips/bits/kernel_sigaction.h,
 * so this should never be used. Lets see whether it is true. */
struct BUG_is_here { char BUG_is_here[-1]; };

#undef HAVE_SA_RESTORER
/* This is the sigaction structure from the Linux 2.1.24 kernel.  */
#include <sgidefs.h>
struct old_kernel_sigaction {
    __sighandler_t  k_sa_handler;
    unsigned int    sa_flags;
    unsigned long   sa_mask;
};
#define _KERNEL_NSIG           128
#define _KERNEL_NSIG_BPW       32
#define _KERNEL_NSIG_WORDS     (_KERNEL_NSIG / _KERNEL_NSIG_BPW)
typedef struct {
    unsigned long sig[_KERNEL_NSIG_WORDS];
} kernel_sigset_t;
/* This is the sigaction structure from the Linux 2.1.68 kernel.  */
struct kernel_sigaction {
    unsigned int    sa_flags;
    __sighandler_t  k_sa_handler;
    kernel_sigset_t sa_mask;
    void            (*sa_restorer)(void);
    int             s_resv[1]; /* reserved */
};

#elif defined(__ia64__)

#define NO_OLD_SIGACTION
#undef HAVE_SA_RESTORER
struct kernel_sigaction {
	__sighandler_t k_sa_handler;
	unsigned long sa_flags;
	sigset_t sa_mask;
};

#else

#define HAVE_SA_RESTORER
/* This is the sigaction structure from the Linux 2.1.20 kernel.  */
struct old_kernel_sigaction {
    __sighandler_t k_sa_handler;
    unsigned long sa_mask;
    unsigned long sa_flags;
    void (*sa_restorer) (void);
};
/* This is the sigaction structure from the Linux 2.1.68 kernel.  */
struct kernel_sigaction {
    __sighandler_t k_sa_handler;
    unsigned long sa_flags;
    void (*sa_restorer) (void);
    sigset_t sa_mask;
};

#endif

#ifndef NO_OLD_SIGACTION
extern int __syscall_sigaction (int, const struct old_kernel_sigaction *,
	struct old_kernel_sigaction *) attribute_hidden;
#endif

extern int __syscall_rt_sigaction (int, const struct kernel_sigaction *,
	struct kernel_sigaction *, size_t) attribute_hidden;

#endif /* _BITS_SIGACTION_STRUCT_H */