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Diffstat (limited to 'ltp_framework/include/ltp_signal.h')
| -rw-r--r-- | ltp_framework/include/ltp_signal.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/ltp_framework/include/ltp_signal.h b/ltp_framework/include/ltp_signal.h new file mode 100644 index 0000000..1ac6f70 --- /dev/null +++ b/ltp_framework/include/ltp_signal.h @@ -0,0 +1,109 @@ +/* + * 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 |