2002-10-23 21:31:10 +04:00
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#ifndef _SIGNAL_H_
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#define _SIGNAL_H_
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/*
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** Distributed under the terms of the OpenBeOS License.
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*/
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2004-07-07 16:48:27 +04:00
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2002-10-23 21:31:10 +04:00
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#include <sys/types.h>
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2004-07-07 16:48:27 +04:00
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typedef int sig_atomic_t;
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2002-11-18 10:24:07 +03:00
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typedef long sigset_t;
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2002-11-17 07:43:13 +03:00
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typedef void (*sig_func_t)(int);
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2002-11-18 10:24:07 +03:00
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typedef void (*__signal_func_ptr)(int); /* deprecated, for compatibility with BeOS only */
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2002-10-23 21:31:10 +04:00
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2006-04-21 13:47:43 +04:00
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typedef union sigval {
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int sival_int;
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void *sival_ptr;
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} sigval_t;
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2004-07-07 16:48:27 +04:00
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// ToDo: actually make use of this structure!
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typedef struct {
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int si_signo; /* signal number */
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int si_code; /* signal code */
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int si_errno; /* if non zero, an error number associated with this signal */
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pid_t si_pid; /* sending process ID */
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uid_t si_uid; /* real user ID of sending process */
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void *si_addr; /* address of faulting instruction */
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int si_status; /* exit value or signal */
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long si_band; /* band event for SIGPOLL */
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2006-04-21 13:47:43 +04:00
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union sigval si_value; /* signal value */
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2004-07-07 16:48:27 +04:00
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} siginfo_t;
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2002-11-18 10:24:07 +03:00
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/*
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* macros defining the standard signal handling behavior
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*/
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#define SIG_DFL ((sig_func_t) 0) /* the signal was treated in the "default" manner */
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#define SIG_IGN ((sig_func_t) 1) /* the signal was ignored */
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2006-04-21 13:47:43 +04:00
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#define SIG_ERR ((sig_func_t)-1) /* an error occurred during signal processing */
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#define SIG_HOLD ((sig_func_t) 3) /* the signal was hold */
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2002-10-23 21:31:10 +04:00
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2002-11-18 10:24:07 +03:00
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/*
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* structure used by sigaction()
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*
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* Note: the 'sa_userdata' field is a non-Posix extension.
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* See the SPECIAL NOTES below for an explanation of this.
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*
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*/
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struct sigaction {
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2004-07-07 16:48:27 +04:00
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sig_func_t sa_handler;
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sigset_t sa_mask;
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int sa_flags;
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void *sa_userdata; /* will be passed to the signal handler */
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2002-11-18 10:24:07 +03:00
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};
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/*
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* values for sa_flags
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*/
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#define SA_NOCLDSTOP 0x01
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#define SA_ONESHOT 0x02
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#define SA_NOMASK 0x04
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#define SA_NODEFER SA_NOMASK
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#define SA_RESTART 0x08
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2006-04-21 13:47:43 +04:00
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#define SA_STACK 0x10
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#define SA_ONSTACK SA_STACK
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#define SA_RESETHAND 0x20
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#define SA_SIGINFO 0x40
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#define SA_NOCLDWAIT 0x80
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/*
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* values for ss_flags
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*/
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#define SS_ONSTACK 0x1
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#define SS_DISABLE 0x2
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2002-11-17 07:43:13 +03:00
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2006-04-21 13:47:43 +04:00
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#define MINSIGSTKSZ 4096
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#define SIGSTKSZ 16384
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2002-11-17 07:43:13 +03:00
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2002-10-23 21:31:10 +04:00
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/*
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2002-11-18 10:24:07 +03:00
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* for signals using an alternate stack
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*/
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typedef struct stack_t {
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2004-07-07 16:48:27 +04:00
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void *ss_sp;
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size_t ss_size;
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2006-04-21 13:47:43 +04:00
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int ss_flags;
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2002-11-18 10:24:07 +03:00
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} stack_t;
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2006-04-21 13:47:43 +04:00
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typedef struct sigstack {
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int ss_onstack;
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void *ss_sp;
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} sigstack;
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2002-11-18 10:24:07 +03:00
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/*
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* for the 'how' arg of sigprocmask()
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*/
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#define SIG_BLOCK 1
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#define SIG_UNBLOCK 2
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#define SIG_SETMASK 3
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/*
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* The list of all defined signals:
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*
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* The numbering of signals for OpenBeOS attempts to maintain
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2002-11-17 07:43:13 +03:00
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* some consistency with UN*X conventions so that things
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* like "kill -9" do what you expect.
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2002-11-18 10:24:07 +03:00
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*/
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2005-10-31 15:39:29 +03:00
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#define SIGHUP 1 /* hangup -- tty is gone! */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* `quit' special character typed in tty */
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#define SIGILL 4 /* illegal instruction */
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#define SIGCHLD 5 /* child process exited */
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#define SIGABRT 6 /* abort() called, dont' catch */
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#define SIGPIPE 7 /* write to a pipe w/no readers */
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill a team (not catchable) */
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#define SIGSTOP 10 /* suspend a thread (not catchable) */
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#define SIGSEGV 11 /* segmentation violation (read: invalid pointer) */
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#define SIGCONT 12 /* continue execution if suspended */
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#define SIGTSTP 13 /* `stop' special character typed in tty */
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#define SIGALRM 14 /* an alarm has gone off (see alarm()) */
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#define SIGTERM 15 /* termination requested */
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#define SIGTTIN 16 /* read of tty from bg process */
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#define SIGTTOU 17 /* write to tty from bg process */
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#define SIGUSR1 18 /* app defined signal 1 */
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#define SIGUSR2 19 /* app defined signal 2 */
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#define SIGWINCH 20 /* tty window size changed */
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#define SIGKILLTHR 21 /* be specific: kill just the thread, not team */
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#define SIGTRAP 22 /* Trace/breakpoint trap */
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#define SIGPOLL 23 /* Pollable event */
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#define SIGPROF 24 /* Profiling timer expired */
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#define SIGSYS 25 /* Bad system call */
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#define SIGURG 26 /* High bandwidth data is available at socket */
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#define SIGVTALRM 27 /* Virtual timer expired */
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#define SIGXCPU 28 /* CPU time limit exceeded */
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#define SIGXFSZ 29 /* File size limit exceeded */
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2002-10-23 21:31:10 +04:00
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#define SIGBUS SIGSEGV /* for old style code */
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2002-11-17 07:43:13 +03:00
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2002-10-23 21:31:10 +04:00
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/*
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2005-10-31 15:39:29 +03:00
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* Signal numbers 30-32 are currently free but may be used in future
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2002-11-17 07:43:13 +03:00
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* releases. Use them at your own peril (if you do use them, at least
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* be smart and use them backwards from signal 32).
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*/
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2002-11-18 10:24:07 +03:00
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#define MAX_SIGNO 32 /* the most signals that a single thread can reference */
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2005-10-31 15:39:29 +03:00
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#define __signal_max 29 /* the largest signal number that is actually defined */
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2002-11-18 10:24:07 +03:00
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#define NSIG (__signal_max+1) /* the number of defined signals */
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2002-10-23 21:31:10 +04:00
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2002-11-18 10:24:07 +03:00
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/* the global table of text strings containing descriptions for each signal */
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extern const char * const sys_siglist[NSIG];
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2002-10-23 21:31:10 +04:00
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2002-10-26 17:31:22 +04:00
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#ifdef __cplusplus
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extern "C" {
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#endif
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2002-10-23 21:31:10 +04:00
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2002-11-18 10:24:07 +03:00
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sig_func_t signal(int sig, sig_func_t signal_handler);
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2006-04-21 13:47:43 +04:00
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int raise(int sig);
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int kill(pid_t pid, int sig);
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2006-06-16 03:39:15 +04:00
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int send_signal(pid_t tid, unsigned int sig);
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2006-04-21 13:47:43 +04:00
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int sigaction(int sig, const struct sigaction *act, struct sigaction *oact);
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int sigprocmask(int how, const sigset_t *set, sigset_t *oset);
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int sigpending(sigset_t *set);
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int sigsuspend(const sigset_t *mask);
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int sigwait(const sigset_t *set, int *sig);
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int sigemptyset(sigset_t *set);
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int sigfillset(sigset_t *set);
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int sigaddset(sigset_t *set, int signo);
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int sigdelset(sigset_t *set, int signo);
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int sigismember(const sigset_t *set, int signo);
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2002-11-17 07:43:13 +03:00
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2002-10-23 21:31:10 +04:00
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const char *strsignal(int sig);
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2002-11-17 07:43:13 +03:00
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2005-11-13 02:27:14 +03:00
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void set_signal_stack(void *ptr, size_t size);
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2002-11-18 10:24:07 +03:00
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int sigaltstack(const stack_t *ss, stack_t *oss); /* XXXdbg */
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2002-11-17 07:43:13 +03:00
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2006-04-21 13:47:43 +04:00
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/*
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* pthread extension : equivalent of sigprocmask()
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*/
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extern int pthread_sigmask(int how, const sigset_t *set, sigset_t *oset);
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2005-09-02 15:53:43 +04:00
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extern inline int
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2002-11-18 10:24:07 +03:00
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sigismember(const sigset_t *set, int sig)
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2002-11-17 07:43:13 +03:00
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{
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2002-10-23 21:31:10 +04:00
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sigset_t mask = (((sigset_t) 1) << (( sig ) - 1)) ;
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return (*set & mask) ? 1 : 0 ;
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2002-11-17 07:43:13 +03:00
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}
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2005-09-02 15:53:43 +04:00
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extern inline int
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2002-10-23 21:31:10 +04:00
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sigaddset(sigset_t *set, int sig)
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2002-11-17 07:43:13 +03:00
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{
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2002-10-23 21:31:10 +04:00
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sigset_t mask = (((sigset_t) 1) << (( sig ) - 1)) ;
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return ((*set |= mask), 0) ;
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2002-11-17 07:43:13 +03:00
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}
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2005-09-02 15:53:43 +04:00
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extern inline int
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2002-10-23 21:31:10 +04:00
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sigdelset(sigset_t *set, int sig)
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2002-11-17 07:43:13 +03:00
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{
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2002-10-23 21:31:10 +04:00
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sigset_t mask = (((sigset_t) 1) << (( sig ) - 1)) ;
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return ((*set &= ~mask), 0) ;
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2002-11-18 10:24:07 +03:00
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}
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2002-11-17 07:43:13 +03:00
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2002-11-18 10:24:07 +03:00
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#ifdef __cplusplus
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}
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#endif
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2002-10-23 21:31:10 +04:00
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2002-11-18 10:24:07 +03:00
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/*
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* ==================================================
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* !!! SPECIAL NOTES CONCERNING NON-POSIX EXTENSIONS:
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* ==================================================
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*
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* The standard Posix interface for signal handlers is not as useful
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* as it could be. The handler can define only one single argument
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* (the signal number). For example:
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* void
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* my_signal_handler(int sig)
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* {
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* . . .
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* }
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*
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* // install the handler
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* signal(SIGINT, &my_signal_handler);
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*
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* The sigaction() function allows finer grained control of the signal
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* handling. It also allows an opportunity, via the 'sigaction' struct, to
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* enable additional data to be passed to the handler. For example:
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* void
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* my_signal_handler(int sig, char *somedata, vregs regs)
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* {
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* . . .
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* }
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*
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* struct sigaction sa;
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* char data_buffer[32];
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*
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* sa.sa_handler = (sig_func_t) my_signal_handler;
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* sigemptyset(&sa.sa_mask);
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* sigaddset(&sa.sa_mask, SIGINT);
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* sa.sa_userdata = data_buffer;
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*
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* // install the handler
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* sigaction(SIGINT, &sa, NULL);
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*
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* The two additional arguments available to the signal handler are extensions
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* to the Posix standard. This feature was introduced by the BeOS and retained
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* by OpenBeOS. However, to remain compatible with Posix and ANSI C, the type
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* of the sa_handler field is defined as 'sig_func_t'. This requires the handler
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* to be cast when assigned to the sa_handler field, as in the example above.
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*
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* NOTE: C++ member functions can not be signal handlers!
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* This is because they expect a "this" pointer as the first argument.
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*
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*
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* The 3 arguments that OpenBeOS provides to signal handlers are as follows:
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*
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* - The first argument is the (usual) signal number.
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*
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* - The second argument is whatever value is put in the sa_userdata field
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* of the sigaction struct.
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*
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* - The third argument is a pointer to a vregs struct (defined below).
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* The vregs struct contains the contents of the volatile registers at
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* the time the signal was delivered to your thread. You can change the fields
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* of the structure. After your signal handler completes, the OS uses this struct
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* to reload the registers for your thread (privileged registers are not loaded
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* of course). The vregs struct is of course terribly machine dependent.
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* If you use it, you should expect to have to re-work your code when new
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* processors come out. Nonetheless, the ability to change the registers does
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* open some interesting programming possibilities.
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*/
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2002-10-23 21:31:10 +04:00
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2002-11-18 10:24:07 +03:00
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/*
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* the vregs struct:
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*
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* signal handlers get this as the last argument
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*/
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2002-11-17 07:43:13 +03:00
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2002-10-26 17:31:22 +04:00
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typedef struct vregs vregs;
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#if __POWERPC__
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struct vregs
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{
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ulong pc, /* program counter */
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r0, /* scratch */
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r1, /* stack ptr */
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r2, /* TOC */
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r3,r4,r5,r6,r7,r8,r9,r10, /* volatile regs */
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r11,r12; /* scratch regs */
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double f0, /* fp scratch */
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f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13; /* fp volatile regs */
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ulong filler1, /* place holder */
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fpscr, /* fp condition codes */
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ctr, xer, cr, msr, lr; /* misc. status */
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};
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#endif /* __POWERPC__ */
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#if __INTEL__
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typedef struct packed_fp_stack {
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unsigned char st0[10];
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unsigned char st1[10];
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unsigned char st2[10];
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unsigned char st3[10];
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unsigned char st4[10];
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unsigned char st5[10];
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|
unsigned char st6[10];
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unsigned char st7[10];
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} packed_fp_stack;
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|
typedef struct packed_mmx_regs {
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|
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unsigned char mm0[10];
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unsigned char mm1[10];
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unsigned char mm2[10];
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|
unsigned char mm3[10];
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|
unsigned char mm4[10];
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|
unsigned char mm5[10];
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|
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|
unsigned char mm6[10];
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|
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|
unsigned char mm7[10];
|
|
|
|
} packed_mmx_regs;
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|
typedef struct old_extended_regs {
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|
|
unsigned short fp_control;
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|
|
unsigned short _reserved1;
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|
|
unsigned short fp_status;
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|
|
|
unsigned short _reserved2;
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|
|
|
unsigned short fp_tag;
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|
|
|
unsigned short _reserved3;
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|
|
|
unsigned long fp_eip;
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|
|
unsigned short fp_cs;
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|
|
|
unsigned short fp_opcode;
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|
|
|
unsigned long fp_datap;
|
|
|
|
unsigned short fp_ds;
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|
|
|
unsigned short _reserved4;
|
|
|
|
union {
|
|
|
|
packed_fp_stack fp;
|
|
|
|
packed_mmx_regs mmx;
|
|
|
|
} fp_mmx;
|
|
|
|
} old_extended_regs;
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|
|
|
|
|
|
|
typedef struct fp_stack {
|
|
|
|
unsigned char st0[10];
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|
|
|
unsigned char _reserved_42_47[6];
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|
|
unsigned char st1[10];
|
|
|
|
unsigned char _reserved_58_63[6];
|
|
|
|
unsigned char st2[10];
|
|
|
|
unsigned char _reserved_74_79[6];
|
|
|
|
unsigned char st3[10];
|
|
|
|
unsigned char _reserved_90_95[6];
|
|
|
|
unsigned char st4[10];
|
|
|
|
unsigned char _reserved_106_111[6];
|
|
|
|
unsigned char st5[10];
|
|
|
|
unsigned char _reserved_122_127[6];
|
|
|
|
unsigned char st6[10];
|
|
|
|
unsigned char _reserved_138_143[6];
|
|
|
|
unsigned char st7[10];
|
|
|
|
unsigned char _reserved_154_159[6];
|
|
|
|
} fp_stack;
|
|
|
|
|
|
|
|
typedef struct mmx_regs {
|
|
|
|
unsigned char mm0[10];
|
|
|
|
unsigned char _reserved_42_47[6];
|
|
|
|
unsigned char mm1[10];
|
|
|
|
unsigned char _reserved_58_63[6];
|
|
|
|
unsigned char mm2[10];
|
|
|
|
unsigned char _reserved_74_79[6];
|
|
|
|
unsigned char mm3[10];
|
|
|
|
unsigned char _reserved_90_95[6];
|
|
|
|
unsigned char mm4[10];
|
|
|
|
unsigned char _reserved_106_111[6];
|
|
|
|
unsigned char mm5[10];
|
|
|
|
unsigned char _reserved_122_127[6];
|
|
|
|
unsigned char mm6[10];
|
|
|
|
unsigned char _reserved_138_143[6];
|
|
|
|
unsigned char mm7[10];
|
|
|
|
unsigned char _reserved_154_159[6];
|
|
|
|
} mmx_regs;
|
|
|
|
|
|
|
|
typedef struct xmmx_regs {
|
|
|
|
unsigned char xmm0[16];
|
|
|
|
unsigned char xmm1[16];
|
|
|
|
unsigned char xmm2[16];
|
|
|
|
unsigned char xmm3[16];
|
|
|
|
unsigned char xmm4[16];
|
|
|
|
unsigned char xmm5[16];
|
|
|
|
unsigned char xmm6[16];
|
|
|
|
unsigned char xmm7[16];
|
|
|
|
} xmmx_regs;
|
|
|
|
|
|
|
|
typedef struct new_extended_regs {
|
|
|
|
unsigned short fp_control;
|
|
|
|
unsigned short fp_status;
|
|
|
|
unsigned short fp_tag;
|
|
|
|
unsigned short fp_opcode;
|
|
|
|
unsigned long fp_eip;
|
|
|
|
unsigned short fp_cs;
|
|
|
|
unsigned short res_14_15;
|
|
|
|
unsigned long fp_datap;
|
|
|
|
unsigned short fp_ds;
|
|
|
|
unsigned short _reserved_22_23;
|
|
|
|
unsigned long mxcsr;
|
|
|
|
unsigned long _reserved_28_31;
|
|
|
|
union {
|
|
|
|
fp_stack fp;
|
|
|
|
mmx_regs mmx;
|
|
|
|
} fp_mmx;
|
|
|
|
xmmx_regs xmmx;
|
|
|
|
unsigned char _reserved_288_511[224];
|
|
|
|
} new_extended_regs;
|
|
|
|
|
|
|
|
typedef struct extended_regs {
|
|
|
|
union {
|
|
|
|
old_extended_regs old_format;
|
|
|
|
new_extended_regs new_format;
|
|
|
|
} state;
|
|
|
|
unsigned long format;
|
|
|
|
} extended_regs;
|
|
|
|
|
|
|
|
struct vregs {
|
|
|
|
unsigned long eip;
|
|
|
|
unsigned long eflags;
|
|
|
|
unsigned long eax;
|
|
|
|
unsigned long ecx;
|
|
|
|
unsigned long edx;
|
|
|
|
unsigned long esp;
|
|
|
|
unsigned long ebp;
|
|
|
|
unsigned long _reserved_1;
|
|
|
|
extended_regs xregs;
|
|
|
|
unsigned long _reserved_2[3];
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* __INTEL__ */
|
|
|
|
|
2002-10-23 21:31:10 +04:00
|
|
|
#endif /* _SIGNAL_H_ */
|