fxlibc/include/target/gint/bits/signum.h

#ifndef __BITS_SIGNUM_H__
# define __BITS_SIGNUM_H__

// Define the number of signals
#define _NSIG		16

/* Fake signal functions. */
#define	SIG_ERR		((__sighandler_t) -1)	/* Error return. */
#define	SIG_DFL		((__sighandler_t)  0)	/* Default action. */
#define	SIG_IGN		((__sighandler_t)  1)	/* Ignore signal. */

/* ISO C99 signals. */
#define	SIGINT		2	/* Interactive attention signal. */
#define	SIGILL		4	/* Illegal instruction. */
#define	SIGABRT		6	/* Abnormal termination. */
#define	SIGFPE		8	/* Erroneous arithmetic operation. */
#define	SIGSEGV		11	/* Invalid access to storage. */
#define	SIGTERM		15	/* Termination request. */

#endif /*__BITS_SIGNUM_H__*/
signal: simple implementation (DONE) This version of signal (which does not rely on a notion of userland processes and is thus excluded from Vhex) follows C99 semantics but does not generate any signals by default. Basically, the signal function sets up function pointers and the signal function calls them. Termination signals call exit() while other signals call _Exit(), which is a quicker program termination similar to abort(). C99 allows programs to long jump out of signal handlers (!) which is unbelievably scary because it would bypass stack switching code in Vhex as well as normal interrupt handler termination in gint. 2021-05-29 18:26:33 +02:00			`#ifndef __BITS_SIGNUM_H__`
			`# define __BITS_SIGNUM_H__`

			`// Define the number of signals`
			`#define _NSIG 16`

			`/* Fake signal functions. */`
			`#define SIG_ERR ((__sighandler_t) -1) /* Error return. */`
			`#define SIG_DFL ((__sighandler_t) 0) /* Default action. */`
			`#define SIG_IGN ((__sighandler_t) 1) /* Ignore signal. */`

			`/* ISO C99 signals. */`
			`#define SIGINT 2 /* Interactive attention signal. */`
			`#define SIGILL 4 /* Illegal instruction. */`
			`#define SIGABRT 6 /* Abnormal termination. */`
			`#define SIGFPE 8 /* Erroneous arithmetic operation. */`
			`#define SIGSEGV 11 /* Invalid access to storage. */`
			`#define SIGTERM 15 /* Termination request. */`

			`#endif /__BITS_SIGNUM_H__/`