[deliverable/linux.git] / include / linux / signal.h

#ifndef _LINUX_SIGNAL_H
#define _LINUX_SIGNAL_H

#include <asm/signal.h>
#include <asm/siginfo.h>

#ifdef __KERNEL__
#include <linux/list.h>
#include <linux/spinlock.h>

/*
 * These values of sa_flags are used only by the kernel as part of the
 * irq handling routines.
 *
 * SA_INTERRUPT is also used by the irq handling routines.
 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
 * SA_PROBEIRQ is set by callers when they expect sharing mismatches to occur
 */
#define SA_SAMPLE_RANDOM	SA_RESTART
#define SA_SHIRQ		0x04000000
#define SA_PROBEIRQ		0x08000000

/*
 * As above, these correspond to the IORESOURCE_IRQ_* defines in
 * linux/ioport.h to select the interrupt line behaviour.  When
 * requesting an interrupt without specifying a SA_TRIGGER, the
 * setting should be assumed to be "as already configured", which
 * may be as per machine or firmware initialisation.
 */
#define SA_TRIGGER_LOW		0x00000008
#define SA_TRIGGER_HIGH		0x00000004
#define SA_TRIGGER_FALLING	0x00000002
#define SA_TRIGGER_RISING	0x00000001
#define SA_TRIGGER_MASK	(SA_TRIGGER_HIGH|SA_TRIGGER_LOW|\
				 SA_TRIGGER_RISING|SA_TRIGGER_FALLING)

/*
 * Real Time signals may be queued.
 */

struct sigqueue {
	struct list_head list;
	int flags;
	siginfo_t info;
	struct user_struct *user;
};

/* flags values. */
#define SIGQUEUE_PREALLOC	1

struct sigpending {
	struct list_head list;
	sigset_t signal;
};

/*
 * Define some primitives to manipulate sigset_t.
 */

#ifndef __HAVE_ARCH_SIG_BITOPS
#include <linux/bitops.h>

/* We don't use <linux/bitops.h> for these because there is no need to
   be atomic.  */
static inline void sigaddset(sigset_t *set, int _sig)
{
	unsigned long sig = _sig - 1;
	if (_NSIG_WORDS == 1)
		set->sig[0] |= 1UL << sig;
	else
		set->sig[sig / _NSIG_BPW] |= 1UL << (sig % _NSIG_BPW);
}

static inline void sigdelset(sigset_t *set, int _sig)
{
	unsigned long sig = _sig - 1;
	if (_NSIG_WORDS == 1)
		set->sig[0] &= ~(1UL << sig);
	else
		set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
}

static inline int sigismember(sigset_t *set, int _sig)
{
	unsigned long sig = _sig - 1;
	if (_NSIG_WORDS == 1)
		return 1 & (set->sig[0] >> sig);
	else
		return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
}

static inline int sigfindinword(unsigned long word)
{
	return ffz(~word);
}

#endif /* __HAVE_ARCH_SIG_BITOPS */

static inline int sigisemptyset(sigset_t *set)
{
	extern void _NSIG_WORDS_is_unsupported_size(void);
	switch (_NSIG_WORDS) {
	case 4:
		return (set->sig[3] | set->sig[2] |
			set->sig[1] | set->sig[0]) == 0;
	case 2:
		return (set->sig[1] | set->sig[0]) == 0;
	case 1:
		return set->sig[0] == 0;
	default:
		_NSIG_WORDS_is_unsupported_size();
		return 0;
	}
}

#define sigmask(sig)	(1UL << ((sig) - 1))

#ifndef __HAVE_ARCH_SIG_SETOPS
#include <linux/string.h>

#define _SIG_SET_BINOP(name, op)					\
static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \
{									\
	extern void _NSIG_WORDS_is_unsupported_size(void);		\
	unsigned long a0, a1, a2, a3, b0, b1, b2, b3;			\
									\
	switch (_NSIG_WORDS) {						\
	    case 4:							\
		a3 = a->sig[3]; a2 = a->sig[2];				\
		b3 = b->sig[3]; b2 = b->sig[2];				\
		r->sig[3] = op(a3, b3);					\
		r->sig[2] = op(a2, b2);					\
	    case 2:							\
		a1 = a->sig[1]; b1 = b->sig[1];				\
		r->sig[1] = op(a1, b1);					\
	    case 1:							\
		a0 = a->sig[0]; b0 = b->sig[0];				\
		r->sig[0] = op(a0, b0);					\
		break;							\
	    default:							\
		_NSIG_WORDS_is_unsupported_size();			\
	}								\
}

#define _sig_or(x,y)	((x) | (y))
_SIG_SET_BINOP(sigorsets, _sig_or)

#define _sig_and(x,y)	((x) & (y))
_SIG_SET_BINOP(sigandsets, _sig_and)

#define _sig_nand(x,y)	((x) & ~(y))
_SIG_SET_BINOP(signandsets, _sig_nand)

#undef _SIG_SET_BINOP
#undef _sig_or
#undef _sig_and
#undef _sig_nand

#define _SIG_SET_OP(name, op)						\
static inline void name(sigset_t *set)					\
{									\
	extern void _NSIG_WORDS_is_unsupported_size(void);		\
									\
	switch (_NSIG_WORDS) {						\
	    case 4: set->sig[3] = op(set->sig[3]);			\
		    set->sig[2] = op(set->sig[2]);			\
	    case 2: set->sig[1] = op(set->sig[1]);			\
	    case 1: set->sig[0] = op(set->sig[0]);			\
		    break;						\
	    default:							\
		_NSIG_WORDS_is_unsupported_size();			\
	}								\
}

#define _sig_not(x)	(~(x))
_SIG_SET_OP(signotset, _sig_not)

#undef _SIG_SET_OP
#undef _sig_not

static inline void sigemptyset(sigset_t *set)
{
	switch (_NSIG_WORDS) {
	default:
		memset(set, 0, sizeof(sigset_t));
		break;
	case 2: set->sig[1] = 0;
	case 1:	set->sig[0] = 0;
		break;
	}
}

static inline void sigfillset(sigset_t *set)
{
	switch (_NSIG_WORDS) {
	default:
		memset(set, -1, sizeof(sigset_t));
		break;
	case 2: set->sig[1] = -1;
	case 1:	set->sig[0] = -1;
		break;
	}
}

/* Some extensions for manipulating the low 32 signals in particular.  */

static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
{
	set->sig[0] |= mask;
}

static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
{
	set->sig[0] &= ~mask;
}

static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
{
	return (set->sig[0] & mask) != 0;
}

static inline void siginitset(sigset_t *set, unsigned long mask)
{
	set->sig[0] = mask;
	switch (_NSIG_WORDS) {
	default:
		memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
		break;
	case 2: set->sig[1] = 0;
	case 1: ;
	}
}

static inline void siginitsetinv(sigset_t *set, unsigned long mask)
{
	set->sig[0] = ~mask;
	switch (_NSIG_WORDS) {
	default:
		memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
		break;
	case 2: set->sig[1] = -1;
	case 1: ;
	}
}

#endif /* __HAVE_ARCH_SIG_SETOPS */

static inline void init_sigpending(struct sigpending *sig)
{
	sigemptyset(&sig->signal);
	INIT_LIST_HEAD(&sig->list);
}

extern void flush_sigqueue(struct sigpending *queue);

/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */
static inline int valid_signal(unsigned long sig)
{
	return sig <= _NSIG ? 1 : 0;
}

extern int group_send_sig_info(int sig, struct siginfo *info, struct task_struct *p);
extern int __group_send_sig_info(int, struct siginfo *, struct task_struct *);
extern long do_sigpending(void __user *, unsigned long);
extern int sigprocmask(int, sigset_t *, sigset_t *);

struct pt_regs;
extern int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka, struct pt_regs *regs, void *cookie);

#endif /* __KERNEL__ */

#endif /* _LINUX_SIGNAL_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _LINUX_SIGNAL_H
	2	#define _LINUX_SIGNAL_H
	3
1da177e4 LT	4	#include <asm/signal.h>
	5	#include <asm/siginfo.h>
	6
	7	#ifdef __KERNEL__
7ab2febd DW	8	#include <linux/list.h>
7ab2febd DW	9	#include <linux/spinlock.h>
1da177e4	10
7f261b5f SS	11	/*
	12	* These values of sa_flags are used only by the kernel as part of the
	13	* irq handling routines.
	14	*
	15	* SA_INTERRUPT is also used by the irq handling routines.
	16	* SA_SHIRQ is for shared interrupt support on PCI and EISA.
13e87ec6	17	* SA_PROBEIRQ is set by callers when they expect sharing mismatches to occur
7f261b5f	18	*/
7f261b5f SS	19	#define SA_SAMPLE_RANDOM SA_RESTART
7f261b5f SS	20	#define SA_SHIRQ 0x04000000
13e87ec6 AM	21	#define SA_PROBEIRQ 0x08000000
13e87ec6 AM	22
9ded96f2 RK	23	/*
	24	* As above, these correspond to the IORESOURCE_IRQ_* defines in
	25	* linux/ioport.h to select the interrupt line behaviour. When
	26	* requesting an interrupt without specifying a SA_TRIGGER, the
	27	* setting should be assumed to be "as already configured", which
	28	* may be as per machine or firmware initialisation.
	29	*/
	30	#define SA_TRIGGER_LOW 0x00000008
	31	#define SA_TRIGGER_HIGH 0x00000004
	32	#define SA_TRIGGER_FALLING 0x00000002
	33	#define SA_TRIGGER_RISING 0x00000001
	34	#define SA_TRIGGER_MASK (SA_TRIGGER_HIGH\|SA_TRIGGER_LOW\|\
	35	SA_TRIGGER_RISING\|SA_TRIGGER_FALLING)
7f261b5f	36
1da177e4 LT	37	/*
	38	* Real Time signals may be queued.
	39	*/
	40
	41	struct sigqueue {
	42	struct list_head list;
1da177e4 LT	43	int flags;
	44	siginfo_t info;
	45	struct user_struct *user;
	46	};
	47
	48	/* flags values. */
	49	#define SIGQUEUE_PREALLOC 1
	50
	51	struct sigpending {
	52	struct list_head list;
	53	sigset_t signal;
	54	};
	55
	56	/*
	57	* Define some primitives to manipulate sigset_t.
	58	*/
	59
	60	#ifndef __HAVE_ARCH_SIG_BITOPS
	61	#include <linux/bitops.h>
	62
	63	/* We don't use <linux/bitops.h> for these because there is no need to
	64	be atomic. */
	65	static inline void sigaddset(sigset_t *set, int _sig)
	66	{
	67	unsigned long sig = _sig - 1;
	68	if (_NSIG_WORDS == 1)
	69	set->sig[0] \|= 1UL << sig;
	70	else
	71	set->sig[sig / _NSIG_BPW] \|= 1UL << (sig % _NSIG_BPW);
	72	}
	73
	74	static inline void sigdelset(sigset_t *set, int _sig)
	75	{
	76	unsigned long sig = _sig - 1;
	77	if (_NSIG_WORDS == 1)
	78	set->sig[0] &= ~(1UL << sig);
	79	else
	80	set->sig[sig / _NSIG_BPW] &= ~(1UL << (sig % _NSIG_BPW));
	81	}
	82
	83	static inline int sigismember(sigset_t *set, int _sig)
	84	{
	85	unsigned long sig = _sig - 1;
	86	if (_NSIG_WORDS == 1)
	87	return 1 & (set->sig[0] >> sig);
	88	else
	89	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
	90	}
	91
	92	static inline int sigfindinword(unsigned long word)
	93	{
	94	return ffz(~word);
	95	}
	96
	97	#endif /* __HAVE_ARCH_SIG_BITOPS */
	98
71fabd5e GA	99	static inline int sigisemptyset(sigset_t *set)
	100	{
	101	extern void _NSIG_WORDS_is_unsupported_size(void);
	102	switch (_NSIG_WORDS) {
	103	case 4:
	104	return (set->sig[3] \| set->sig[2] \|
	105	set->sig[1] \| set->sig[0]) == 0;
	106	case 2:
	107	return (set->sig[1] \| set->sig[0]) == 0;
	108	case 1:
	109	return set->sig[0] == 0;
	110	default:
	111	_NSIG_WORDS_is_unsupported_size();
	112	return 0;
	113	}
	114	}
	115
1da177e4 LT	116	#define sigmask(sig) (1UL << ((sig) - 1))
	117
	118	#ifndef __HAVE_ARCH_SIG_SETOPS
	119	#include <linux/string.h>
	120
	121	#define _SIG_SET_BINOP(name, op) \
	122	static inline void name(sigset_t r, const sigset_t a, const sigset_t *b) \
	123	{ \
	124	extern void _NSIG_WORDS_is_unsupported_size(void); \
	125	unsigned long a0, a1, a2, a3, b0, b1, b2, b3; \
	126	\
	127	switch (_NSIG_WORDS) { \
	128	case 4: \
	129	a3 = a->sig[3]; a2 = a->sig[2]; \
	130	b3 = b->sig[3]; b2 = b->sig[2]; \
	131	r->sig[3] = op(a3, b3); \
	132	r->sig[2] = op(a2, b2); \
	133	case 2: \
	134	a1 = a->sig[1]; b1 = b->sig[1]; \
	135	r->sig[1] = op(a1, b1); \
	136	case 1: \
	137	a0 = a->sig[0]; b0 = b->sig[0]; \
	138	r->sig[0] = op(a0, b0); \
	139	break; \
	140	default: \
	141	_NSIG_WORDS_is_unsupported_size(); \
	142	} \
	143	}
	144
	145	#define _sig_or(x,y) ((x) \| (y))
	146	_SIG_SET_BINOP(sigorsets, _sig_or)
	147
	148	#define _sig_and(x,y) ((x) & (y))
	149	_SIG_SET_BINOP(sigandsets, _sig_and)
	150
	151	#define _sig_nand(x,y) ((x) & ~(y))
	152	_SIG_SET_BINOP(signandsets, _sig_nand)
	153
	154	#undef _SIG_SET_BINOP
	155	#undef _sig_or
	156	#undef _sig_and
	157	#undef _sig_nand
	158
	159	#define _SIG_SET_OP(name, op) \
	160	static inline void name(sigset_t *set) \
	161	{ \
	162	extern void _NSIG_WORDS_is_unsupported_size(void); \
	163	\
	164	switch (_NSIG_WORDS) { \
	165	case 4: set->sig[3] = op(set->sig[3]); \
	166	set->sig[2] = op(set->sig[2]); \
	167	case 2: set->sig[1] = op(set->sig[1]); \
	168	case 1: set->sig[0] = op(set->sig[0]); \
	169	break; \
	170	default: \
	171	_NSIG_WORDS_is_unsupported_size(); \
	172	} \
	173	}
	174
	175	#define _sig_not(x) (~(x))
	176	_SIG_SET_OP(signotset, _sig_not)
	177
	178	#undef _SIG_SET_OP
	179	#undef _sig_not
180
181	static inline void sigemptyset(sigset_t *set)
182	{
183	switch (_NSIG_WORDS) {
184	default:
185	memset(set, 0, sizeof(sigset_t));
186	break;
187	case 2: set->sig[1] = 0;
188	case 1: set->sig[0] = 0;
189	break;
190	}
191	}
192
193	static inline void sigfillset(sigset_t *set)
194	{
195	switch (_NSIG_WORDS) {
196	default:
197	memset(set, -1, sizeof(sigset_t));
198	break;
199	case 2: set->sig[1] = -1;
200	case 1: set->sig[0] = -1;
201	break;
202	}
203	}
204
205	/* Some extensions for manipulating the low 32 signals in particular. */
206
207	static inline void sigaddsetmask(sigset_t *set, unsigned long mask)
208	{
209	set->sig[0] \|= mask;
210	}
211
212	static inline void sigdelsetmask(sigset_t *set, unsigned long mask)
213	{
214	set->sig[0] &= ~mask;
215	}
216
217	static inline int sigtestsetmask(sigset_t *set, unsigned long mask)
218	{
219	return (set->sig[0] & mask) != 0;
220	}
221
222	static inline void siginitset(sigset_t *set, unsigned long mask)
223	{
224	set->sig[0] = mask;
225	switch (_NSIG_WORDS) {
226	default:
227	memset(&set->sig[1], 0, sizeof(long)*(_NSIG_WORDS-1));
228	break;
229	case 2: set->sig[1] = 0;
230	case 1: ;
231	}
232	}
233
234	static inline void siginitsetinv(sigset_t *set, unsigned long mask)
235	{
236	set->sig[0] = ~mask;
237	switch (_NSIG_WORDS) {
238	default:
239	memset(&set->sig[1], -1, sizeof(long)*(_NSIG_WORDS-1));
240	break;
241	case 2: set->sig[1] = -1;
242	case 1: ;
243	}
244	}
245
246	#endif /* __HAVE_ARCH_SIG_SETOPS */
247
248	static inline void init_sigpending(struct sigpending *sig)
249	{
250	sigemptyset(&sig->signal);
251	INIT_LIST_HEAD(&sig->list);
252	}
253
6a14c5c9 ON	254	extern void flush_sigqueue(struct sigpending *queue);
6a14c5c9 ON	255
e5bdd883 JJ	256	/* Test if 'sig' is valid signal. Use this instead of testing _NSIG directly */
	257	static inline int valid_signal(unsigned long sig)
	258	{
	259	return sig <= _NSIG ? 1 : 0;
	260	}
	261
1da177e4 LT	262	extern int group_send_sig_info(int sig, struct siginfo info, struct task_struct p);
	263	extern int __group_send_sig_info(int, struct siginfo , struct task_struct );
	264	extern long do_sigpending(void __user *, unsigned long);
	265	extern int sigprocmask(int, sigset_t , sigset_t );
	266
1da177e4 LT	267	struct pt_regs;
1da177e4 LT	268	extern int get_signal_to_deliver(siginfo_t info, struct k_sigaction return_ka, struct pt_regs regs, void cookie);
1da177e4 LT	269
	270	#endif /* __KERNEL__ */
	271
	272	#endif /* _LINUX_SIGNAL_H */