arch/xtensa/include/asm/signal.h

   1 /*
   2  * include/asm-xtensa/signal.h
   3  *
   4  * Swiped from SH.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  *
  10  * Copyright (C) 2001 - 2005 Tensilica Inc.
  11  */
  12
  13 #ifndef _XTENSA_SIGNAL_H
  14 #define _XTENSA_SIGNAL_H
  15
  16
  17 #define _NSIG           64
  18 #define _NSIG_BPW       32
  19 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  20
  21 #ifndef __ASSEMBLY__
  22
  23 #include <linux/types.h>
  24
  25 /* Avoid too many header ordering problems.  */
  26 struct siginfo;
  27 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  28 typedef struct {
  29         unsigned long sig[_NSIG_WORDS];
  30 } sigset_t;
  31
  32 #endif
  33
  34 #define SIGHUP           1
  35 #define SIGINT           2
  36 #define SIGQUIT          3
  37 #define SIGILL           4
  38 #define SIGTRAP          5
  39 #define SIGABRT          6
  40 #define SIGIOT           6
  41 #define SIGBUS           7
  42 #define SIGFPE           8
  43 #define SIGKILL          9
  44 #define SIGUSR1         10
  45 #define SIGSEGV         11
  46 #define SIGUSR2         12
  47 #define SIGPIPE         13
  48 #define SIGALRM         14
  49 #define SIGTERM         15
  50 #define SIGSTKFLT       16
  51 #define SIGCHLD         17
  52 #define SIGCONT         18
  53 #define SIGSTOP         19
  54 #define SIGTSTP         20
  55 #define SIGTTIN         21
  56 #define SIGTTOU         22
  57 #define SIGURG          23
  58 #define SIGXCPU         24
  59 #define SIGXFSZ         25
  60 #define SIGVTALRM       26
  61 #define SIGPROF         27
  62 #define SIGWINCH        28
  63 #define SIGIO           29
  64 #define SIGPOLL         SIGIO
  65 /* #define SIGLOST              29 */
  66 #define SIGPWR          30
  67 #define SIGSYS          31
  68 #define SIGUNUSED       31
  69
  70 /* These should not be considered constants from userland.  */
  71 #define SIGRTMIN        32
  72 #define SIGRTMAX        (_NSIG-1)
  73
  74 /*
  75  * SA_FLAGS values:
  76  *
  77  * SA_ONSTACK indicates that a registered stack_t will be used.
  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
  98 #define SA_RESTORER     0x04000000
  99
 100 /*
 101  * sigaltstack controls
 102  */
 103 #define SS_ONSTACK      1
 104 #define SS_DISABLE      2
 105
 106 #define MINSIGSTKSZ     2048
 107 #define SIGSTKSZ        8192
 108
 109 #ifndef __ASSEMBLY__
 110
 111 #define SIG_BLOCK          0    /* for blocking signals */
 112 #define SIG_UNBLOCK        1    /* for unblocking signals */
 113 #define SIG_SETMASK        2    /* for setting the signal mask */
 114
 115 /* Type of a signal handler.  */
 116 typedef void (*__sighandler_t)(int);
 117
 118 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
 119 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
 120 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
 121
 122 #ifdef __KERNEL__
 123 struct old_sigaction {
 124         __sighandler_t sa_handler;
 125         old_sigset_t sa_mask;
 126         unsigned long sa_flags;
 127         void (*sa_restorer)(void);
 128 };
 129
 130 struct sigaction {
 131         __sighandler_t sa_handler;
 132         unsigned long sa_flags;
 133         void (*sa_restorer)(void);
 134         sigset_t sa_mask;               /* mask last for extensibility */
 135 };
 136
 137 struct k_sigaction {
 138         struct sigaction sa;
 139 };
 140
 141 #else
 142
 143 /* Here we must cater to libcs that poke about in kernel headers.  */
 144
 145 struct sigaction {
 146         union {
 147           __sighandler_t _sa_handler;
 148           void (*_sa_sigaction)(int, struct siginfo *, void *);
 149         } _u;
 150         sigset_t sa_mask;
 151         unsigned long sa_flags;
 152         void (*sa_restorer)(void);
 153 };
 154
 155 #define sa_handler      _u._sa_handler
 156 #define sa_sigaction    _u._sa_sigaction
 157
 158 #endif /* __KERNEL__ */
 159
 160 typedef struct sigaltstack {
 161         void *ss_sp;
 162         int ss_flags;
 163         size_t ss_size;
 164 } stack_t;
 165
 166 #ifdef __KERNEL__
 167 #include <asm/sigcontext.h>
 168 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 169
 170 #endif  /* __KERNEL__ */
 171 #endif  /* __ASSEMBLY__ */
 172 #endif  /* _XTENSA_SIGNAL_H */