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/*
* Copyright (c) 2009 Cisco Systems, Inc. All Rights Reserved.
* Copyright (c) 2009 FUJITSU LIMITED. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Author: Liu Bo <liubo2009@cn.fujitsu.com>
* Author: Garrett Cooper <yanegomi@gmail.com>
*
*/
#ifndef __LTP_SIGNAL_H
#define __LTP_SIGNAL_H
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include "config.h"
#define SIGSETSIZE (_NSIG / 8)
#ifdef LTP_RT_SIG_TEST
#ifdef __x86_64__
/*
* From asm/signal.h -- this value isn't exported anywhere outside of glibc and
* asm/signal.h and is only required for the rt_sig* function family because
* sigaction(2), et all, appends this if necessary to
* (struct sigaction).sa_flags. HEH.
*
* I do #undef though, just in case...
*
* Also, from .../arch/x86/kernel/signal.c:448 for v2.6.30 (something or
* other):
*
* x86-64 should always use SA_RESTORER.
*
* -- thus SA_RESTORER must always be defined along with
* (struct sigaction).sa_restorer for this architecture.
*/
#undef SA_RESTORER
#define HAVE_SA_RESTORER
#define SA_RESTORER 0x04000000
struct kernel_sigaction {
__sighandler_t k_sa_handler;
unsigned long sa_flags;
void (*sa_restorer) (void);
sigset_t sa_mask;
};
void (*restore_rt) (void);
inline void
handler_h (int signal)
{
return;
}
/* Setup an initial signal handler for signal number = sig for x86_64. */
inline int
sig_initial(int sig)
{
int ret_code = -1;
struct sigaction act, oact;
act.sa_handler = handler_h;
/* Clear out the signal set. */
if (sigemptyset(&act.sa_mask) < 0) {
/* Add the signal to the mask set. */
} else if (sigaddset(&act.sa_mask, sig) < 0) {
/* Set act.sa_restorer via syscall(2) */
} else if (sigaction(sig, &act, &oact) < 0) {
/* Copy oact.sa_restorer via syscall(2) */
} else if (sigaction(sig, &act, &oact) < 0) {
/* And voila -- we just tricked the kernel into giving us our
* restorer function! */
} else {
restore_rt = oact.sa_restorer;
ret_code = 0;
}
return ret_code;
}
#endif /* __x86_64__ */
#endif /* LTP_RT_SIG_TEST */
#endif
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