1#ifndef _ASMi386_SIGNAL_H
2#define _ASMi386_SIGNAL_H
3
4#include <linux/types.h>
5
6/* Avoid too many header ordering problems.  */
7struct siginfo;
8
9#ifdef __KERNEL__
10/* Most things should be clean enough to redefine this at will, if care
11   is taken to make libc match.  */
12
13#define _NSIG		64
14#define _NSIG_BPW	32
15#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
16
17typedef unsigned long old_sigset_t;		/* at least 32 bits */
18
19typedef struct {
20	unsigned long sig[_NSIG_WORDS];
21} sigset_t;
22
23#else
24/* Here we must cater to libcs that poke about in kernel headers.  */
25
26#define NSIG		32
27typedef unsigned long sigset_t;
28
29#endif /* __KERNEL__ */
30
31#define SIGHUP		 1
32#define SIGINT		 2
33#define SIGQUIT		 3
34#define SIGILL		 4
35#define SIGTRAP		 5
36#define SIGABRT		 6
37#define SIGIOT		 6
38#define SIGBUS		 7
39#define SIGFPE		 8
40#define SIGKILL		 9
41#define SIGUSR1		10
42#define SIGSEGV		11
43#define SIGUSR2		12
44#define SIGPIPE		13
45#define SIGALRM		14
46#define SIGTERM		15
47#define SIGSTKFLT	16
48#define SIGCHLD		17
49#define SIGCONT		18
50#define SIGSTOP		19
51#define SIGTSTP		20
52#define SIGTTIN		21
53#define SIGTTOU		22
54#define SIGURG		23
55#define SIGXCPU		24
56#define SIGXFSZ		25
57#define SIGVTALRM	26
58#define SIGPROF		27
59#define SIGWINCH	28
60#define SIGIO		29
61#define SIGPOLL		SIGIO
62/*
63#define SIGLOST		29
64*/
65#define SIGPWR		30
66#define SIGSYS		31
67#define	SIGUNUSED	31
68
69/* These should not be considered constants from userland.  */
70#define SIGRTMIN	32
71#define SIGRTMAX	(_NSIG-1)
72
73/*
74 * SA_FLAGS values:
75 *
76 * SA_ONSTACK indicates that a registered stack_t will be used.
77 * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
78 * SA_RESTART flag to get restarting signals (which were the default long ago)
79 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
80 * SA_RESETHAND clears the handler when the signal is delivered.
81 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
82 * SA_NODEFER prevents the current signal from being masked in the handler.
83 *
84 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
85 * Unix names RESETHAND and NODEFER respectively.
86 */
87#define SA_NOCLDSTOP	0x00000001
88#define SA_NOCLDWAIT	0x00000002 /* not supported yet */
89#define SA_SIGINFO	0x00000004
90#define SA_ONSTACK	0x08000000
91#define SA_RESTART	0x10000000
92#define SA_NODEFER	0x40000000
93#define SA_RESETHAND	0x80000000
94
95#define SA_NOMASK	SA_NODEFER
96#define SA_ONESHOT	SA_RESETHAND
97#define SA_INTERRUPT	0x20000000 /* dummy -- ignored */
98
99#define SA_RESTORER	0x04000000
100
101/*
102 * sigaltstack controls
103 */
104#define SS_ONSTACK	1
105#define SS_DISABLE	2
106
107#define MINSIGSTKSZ	2048
108#define SIGSTKSZ	8192
109
110#ifdef __KERNEL__
111
112/*
113 * These values of sa_flags are used only by the kernel as part of the
114 * irq handling routines.
115 *
116 * SA_INTERRUPT is also used by the irq handling routines.
117 * SA_SHIRQ is for shared interrupt support on PCI and EISA.
118 */
119#define SA_PROBE		SA_ONESHOT
120#define SA_SAMPLE_RANDOM	SA_RESTART
121#define SA_SHIRQ		0x04000000
122#endif
123
124#define SIG_BLOCK          0	/* for blocking signals */
125#define SIG_UNBLOCK        1	/* for unblocking signals */
126#define SIG_SETMASK        2	/* for setting the signal mask */
127
128/* Type of a signal handler.  */
129typedef void (*__sighandler_t)(int);
130
131#define SIG_DFL	((__sighandler_t)0)	/* default signal handling */
132#define SIG_IGN	((__sighandler_t)1)	/* ignore signal */
133#define SIG_ERR	((__sighandler_t)-1)	/* error return from signal */
134
135#ifdef __KERNEL__
136struct old_sigaction {
137	__sighandler_t sa_handler;
138	old_sigset_t sa_mask;
139	unsigned long sa_flags;
140	void (*sa_restorer)(void);
141};
142
143struct sigaction {
144	__sighandler_t sa_handler;
145	unsigned long sa_flags;
146	void (*sa_restorer)(void);
147	sigset_t sa_mask;		/* mask last for extensibility */
148};
149
150struct k_sigaction {
151	struct sigaction sa;
152};
153#else
154/* Here we must cater to libcs that poke about in kernel headers.  */
155
156struct sigaction {
157	union {
158	  __sighandler_t _sa_handler;
159	  void (*_sa_sigaction)(int, struct siginfo *, void *);
160	} _u;
161	sigset_t sa_mask;
162	unsigned long sa_flags;
163	void (*sa_restorer)(void);
164};
165
166#define sa_handler	_u._sa_handler
167#define sa_sigaction	_u._sa_sigaction
168
169#endif /* __KERNEL__ */
170
171typedef struct sigaltstack {
172	void *ss_sp;
173	int ss_flags;
174	size_t ss_size;
175} stack_t;
176
177#ifdef __KERNEL__
178#include <asm/sigcontext.h>
179
180#define __HAVE_ARCH_SIG_BITOPS
181
182static __inline__ void sigaddset(sigset_t *set, int _sig)
183{
184	__asm__("btsl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
185}
186
187static __inline__ void sigdelset(sigset_t *set, int _sig)
188{
189	__asm__("btrl %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
190}
191
192static __inline__ int __const_sigismember(sigset_t *set, int _sig)
193{
194	unsigned long sig = _sig - 1;
195	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
196}
197
198static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
199{
200	int ret;
201	__asm__("btl %2,%1\n\tsbbl %0,%0"
202		: "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
203	return ret;
204}
205
206#define sigismember(set,sig)			\
207	(__builtin_constant_p(sig) ?		\
208	 __const_sigismember((set),(sig)) :	\
209	 __gen_sigismember((set),(sig)))
210
211#define sigmask(sig)	(1UL << ((sig) - 1))
212
213static __inline__ int sigfindinword(unsigned long word)
214{
215	__asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
216	return word;
217}
218
219#endif /* __KERNEL__ */
220
221#endif
222