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Linux/include/asm-alpha/signal.h

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  1 #ifndef _ASMAXP_SIGNAL_H
  2 #define _ASMAXP_SIGNAL_H
  3 
  4 #include <linux/types.h>
  5 
  6 /* Avoid too many header ordering problems.  */
  7 struct siginfo;
  8 
  9 #ifdef __KERNEL__
 10 /* Digital Unix defines 64 signals.  Most things should be clean enough
 11    to redefine this at will, if care is taken to make libc match.  */
 12 
 13 #define _NSIG           64
 14 #define _NSIG_BPW       64
 15 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
 16 
 17 typedef unsigned long old_sigset_t;             /* at least 32 bits */
 18 
 19 typedef 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
 27 typedef unsigned long sigset_t;
 28 
 29 #endif /* __KERNEL__ */
 30 
 31 
 32 /*
 33  * Linux/AXP has different signal numbers that Linux/i386: I'm trying
 34  * to make it OSF/1 binary compatible, at least for normal binaries.
 35  */
 36 #define SIGHUP           1
 37 #define SIGINT           2
 38 #define SIGQUIT          3
 39 #define SIGILL           4
 40 #define SIGTRAP          5
 41 #define SIGABRT          6
 42 #define SIGEMT           7
 43 #define SIGFPE           8
 44 #define SIGKILL          9
 45 #define SIGBUS          10
 46 #define SIGSEGV         11
 47 #define SIGSYS          12
 48 #define SIGPIPE         13
 49 #define SIGALRM         14
 50 #define SIGTERM         15
 51 #define SIGURG          16
 52 #define SIGSTOP         17
 53 #define SIGTSTP         18
 54 #define SIGCONT         19
 55 #define SIGCHLD         20
 56 #define SIGTTIN         21
 57 #define SIGTTOU         22
 58 #define SIGIO           23
 59 #define SIGXCPU         24
 60 #define SIGXFSZ         25
 61 #define SIGVTALRM       26
 62 #define SIGPROF         27
 63 #define SIGWINCH        28
 64 #define SIGINFO         29
 65 #define SIGUSR1         30
 66 #define SIGUSR2         31
 67 
 68 #define SIGPOLL SIGIO
 69 #define SIGPWR  SIGINFO
 70 #define SIGIOT  SIGABRT
 71 
 72 /* These should not be considered constants from userland.  */
 73 #define SIGRTMIN        32
 74 #define SIGRTMAX        (_NSIG-1)
 75 
 76 /*
 77  * SA_FLAGS values:
 78  *
 79  * SA_ONSTACK indicates that a registered stack_t will be used.
 80  * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
 81  * SA_RESTART flag to get restarting signals (which were the default long ago)
 82  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
 83  * SA_RESETHAND clears the handler when the signal is delivered.
 84  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
 85  * SA_NODEFER prevents the current signal from being masked in the handler.
 86  *
 87  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
 88  * Unix names RESETHAND and NODEFER respectively.
 89  */
 90 
 91 #define SA_ONSTACK      0x00000001
 92 #define SA_RESTART      0x00000002
 93 #define SA_NOCLDSTOP    0x00000004
 94 #define SA_NODEFER      0x00000008
 95 #define SA_RESETHAND    0x00000010
 96 #define SA_NOCLDWAIT    0x00000020 /* not supported yet */
 97 #define SA_SIGINFO      0x00000040
 98 
 99 #define SA_ONESHOT      SA_RESETHAND
100 #define SA_NOMASK       SA_NODEFER
101 #define SA_INTERRUPT    0x20000000 /* dummy -- ignored */
102 
103 /* 
104  * sigaltstack controls
105  */
106 #define SS_ONSTACK      1
107 #define SS_DISABLE      2
108 
109 #define MINSIGSTKSZ     4096
110 #define SIGSTKSZ        16384
111 
112 
113 #ifdef __KERNEL__
114 /*
115  * These values of sa_flags are used only by the kernel as part of the
116  * irq handling routines.
117  *
118  * SA_INTERRUPT is also used by the irq handling routines.
119  * SA_SHIRQ is for shared interrupt support on PCI and EISA.
120  */
121 #define SA_PROBE                SA_ONESHOT
122 #define SA_SAMPLE_RANDOM        SA_RESTART
123 #define SA_SHIRQ                0x40000000
124 #endif
125 
126 #define SIG_BLOCK          1    /* for blocking signals */
127 #define SIG_UNBLOCK        2    /* for unblocking signals */
128 #define SIG_SETMASK        3    /* for setting the signal mask */
129 
130 /* Type of a signal handler.  */
131 typedef void (*__sighandler_t)(int);
132 
133 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
134 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
135 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
136 
137 #ifdef __KERNEL__
138 struct osf_sigaction {
139         __sighandler_t  sa_handler;
140         old_sigset_t    sa_mask;
141         int             sa_flags;
142 };
143 
144 struct sigaction {
145         __sighandler_t  sa_handler;
146         unsigned long   sa_flags;
147         sigset_t        sa_mask;        /* mask last for extensibility */
148 };
149 
150 struct k_sigaction {
151         struct sigaction sa;
152         void (*ka_restorer)(void);
153 };
154 #else
155 /* Here we must cater to libcs that poke about in kernel headers.  */
156 
157 struct sigaction {
158         union {
159           __sighandler_t        _sa_handler;
160           void (*_sa_sigaction)(int, struct siginfo *, void *);
161         } _u;
162         sigset_t        sa_mask;
163         int             sa_flags;
164 };
165 
166 #define sa_handler      _u._sa_handler
167 #define sa_sigaction    _u._sa_sigaction
168 
169 #endif /* __KERNEL__ */
170 
171 typedef struct sigaltstack {
172         void *ss_sp;
173         int ss_flags;
174         size_t ss_size;
175 } stack_t;
176 
177 /* sigstack(2) is deprecated, and will be withdrawn in a future version
178    of the X/Open CAE Specification.  Use sigaltstack instead.  It is only
179    implemented here for OSF/1 compatibility.  */
180 
181 struct sigstack {
182         void *ss_sp;
183         int ss_onstack;
184 };
185 
186 #ifdef __KERNEL__
187 #include <asm/sigcontext.h>
188 #endif
189 
190 #endif
191 

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