mes/include/signal.h

/* -*-comment-start: "//";comment-end:""-*-
 * Mes --- Maxwell Equations of Software
 * Copyright © 2017 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 *
 * This file is part of Mes.
 *
 * Mes is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or (at
 * your option) any later version.
 *
 * Mes is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Mes.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __MES_SIGNAL_H
#define __MES_SIGNAL_H 1

#if __GNUC__ && POSIX
#undef __MES_SIGNAL_H
#include_next <signal.h>
#else //! (__GNUC__ && POSIX)
typedef int sigset_t;

typedef int stack_t;

#ifndef __MES_PID_T
#define __MES_PID_T
typedef int pid_t;
#endif

#ifndef __MES_UID_T
#define __MES_UID_T
typedef int uid_t;
#endif

typedef int clock_t;
typedef int sigval_t;

#define SIGHUP		 1
#define SIGINT		 2
#define SIGQUIT		 3
#define SIGILL		 4
#define SIGTRAP		 5
#define SIGABRT		 6
#define SIGIOT		 6
#define SIGBUS		 7
#define SIGFPE		 8
#define SIGKILL		 9
#define SIGUSR1		10
#define SIGSEGV		11
#define SIGUSR2		12
#define SIGPIPE		13
#define SIGALRM		14
#define SIGTERM		15
#define SIGSTKFLT	16
#define SIGCHLD		17
#define SIGCONT		18
#define SIGSTOP		19
#define SIGTSTP		20
#define SIGTTIN		21
#define SIGTTOU		22
#define SIGURG		23
#define SIGXCPU		24
#define SIGXFSZ		25
#define SIGVTALRM	26
#define SIGPROF		27
#define SIGWINCH	28
#define SIGIO		29
#define SIGPOLL		SIGIO

#define FPE_INTDIV	1
#define FPE_INTOVF	2
#define FPE_FLTDIV	3
#define FPE_FLTOVF	4
#define FPE_FLTUND	5
#define FPE_FLTRES	6
#define FPE_FLTINV	7
#define FPE_FLTSUB	8

#define SA_NOCLDSTOP	0x00000001
#define SA_NOCLDWAIT	0x00000002
#define SA_SIGINFO	0x00000004
#define SA_ONSTACK	0x08000000
#define SA_RESTART	0x10000000
#define SA_NODEFER	0x40000000
#define SA_RESETHAND	0x80000000

#define SA_NOMASK	SA_NODEFER
#define SA_ONESHOT	SA_RESETHAND


typedef struct siginfo_t {
  int si_signo;
  int si_errno;
  int si_code;
  int si_trapno;
  pid_t si_pid;
  uid_t si_uid;
  int si_status;
  clock_t si_utime;
  clock_t si_stime;
  sigval_t si_value;
  int si_int;
  void *si_ptr;
  int si_overrun;
  int si_timerid;
  void *si_addr;
  long si_band;
  int si_fd;
  short si_addr_lsb;
  void *si_lower;
  void *si_upper;
  int si_pkey;
  void *si_call_addr;
  int si_syscall;
  unsigned int si_arch;
} siginfo_t;


// typedef void __signalfn_t(int);
// typedef __signalfn_t *__sighandler_t;
// typedef __signalfn_t *__sighandler_t;
typedef void __sighandler_t(int);

struct sigaction {
 void (*sa_sigaction) (int, siginfo_t *, void *);
  //__sighandler_t sa_handler;
  void (*sa_handler) (int);
  unsigned long sa_flags;
  sigset_t sa_mask;
};

#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */

#ifdef __i386__

#define EBX 0
#define ECX 1
#define EDX 2
#define ESI 3
#define EDI 4
#define EBP 5
#define EAX 6
#define DS 7
#define ES 8
#define FS 9
#define GS 10
#define ORIG_EAX 11
#define EIP 12
#define CS  13
#define EFL 14
#define UESP 15
#define SS   16
#define FRAME_SIZE 17

/* Type for general register.  */
typedef int greg_t;

/* Number of general registers.  */
#define NGREG	19

/* Container for all general registers.  */
typedef greg_t gregset_t[NGREG];

/* Definitions taken from the kernel headers.  */
struct _libc_fpreg
{
  unsigned short int significand[4];
  unsigned short int exponent;
};

struct _libc_fpstate
{
  unsigned long int cw;
  unsigned long int sw;
  unsigned long int tag;
  unsigned long int ipoff;
  unsigned long int cssel;
  unsigned long int dataoff;
  unsigned long int datasel;
  struct _libc_fpreg _st[8];
  unsigned long int status;
};

/* Structure to describe FPU registers.  */
typedef struct _libc_fpstate *fpregset_t;

typedef struct
  {
    gregset_t gregs;
    /* Due to Linux's history we have to use a pointer here.  The SysV/i386
       ABI requires a struct with the values.  */
    fpregset_t fpregs;
    unsigned long int oldmask;
    unsigned long int cr2;
  } mcontext_t;

/* Userlevel context.  */
typedef struct ucontext
  {
    unsigned long int uc_flags;
    struct ucontext *uc_link;
    stack_t uc_stack;
    mcontext_t uc_mcontext;
    sigset_t uc_sigmask;
    struct _libc_fpstate __fpregs_mem;
  } ucontext_t;
#endif // !__i386__

int sigaction (int signum, struct sigaction const *act, struct sigaction *oldact);
int sigemptyset (sigset_t *set);

#endif //! (__GNUC__ && POSIX)

#endif // __MES_SIGNAL_H