include/asm-xtensa/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_INTERRUPT is a no-op, but left due to historical reasons. Use the
  79  * SA_RESTART flag to get restarting signals (which were the default long ago)
  80  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  81  * SA_RESETHAND clears the handler when the signal is delivered.
  82  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  83  * SA_NODEFER prevents the current signal from being masked in the handler.
  84  *
  85  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  86  * Unix names RESETHAND and NODEFER respectively.
  87  */
  88 #define SA_NOCLDSTOP    0x00000001
  89 #define SA_NOCLDWAIT    0x00000002 /* not supported yet */
  90 #define SA_SIGINFO      0x00000004
  91 #define SA_ONSTACK      0x08000000
  92 #define SA_RESTART      0x10000000
  93 #define SA_NODEFER      0x40000000
  94 #define SA_RESETHAND    0x80000000
  95
  96 #define SA_NOMASK       SA_NODEFER
  97 #define SA_ONESHOT      SA_RESETHAND
  98 #define SA_INTERRUPT    0x20000000 /* dummy -- ignored */
  99
 100 #define SA_RESTORER     0x04000000
 101
 102 /*
 103  * sigaltstack controls
 104  */
 105 #define SS_ONSTACK      1
 106 #define SS_DISABLE      2
 107
 108 #define MINSIGSTKSZ     2048
 109 #define SIGSTKSZ        8192
 110
 111 #ifndef __ASSEMBLY__
 112 #ifdef __KERNEL__
 113
 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                0x04000000
 124 #endif
 125
 126 #define SIG_BLOCK          0    /* for blocking signals */
 127 #define SIG_UNBLOCK        1    /* for unblocking signals */
 128 #define SIG_SETMASK        2    /* 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 old_sigaction {
 139         __sighandler_t sa_handler;
 140         old_sigset_t sa_mask;
 141         unsigned long sa_flags;
 142         void (*sa_restorer)(void);
 143 };
 144
 145 struct sigaction {
 146         __sighandler_t sa_handler;
 147         unsigned long sa_flags;
 148         void (*sa_restorer)(void);
 149         sigset_t sa_mask;               /* mask last for extensibility */
 150 };
 151
 152 struct k_sigaction {
 153         struct sigaction sa;
 154 };
 155
 156 #else
 157
 158 /* Here we must cater to libcs that poke about in kernel headers.  */
 159
 160 struct sigaction {
 161         union {
 162           __sighandler_t _sa_handler;
 163           void (*_sa_sigaction)(int, struct siginfo *, void *);
 164         } _u;
 165         sigset_t sa_mask;
 166         unsigned long sa_flags;
 167         void (*sa_restorer)(void);
 168 };
 169
 170 #define sa_handler      _u._sa_handler
 171 #define sa_sigaction    _u._sa_sigaction
 172
 173 #endif /* __KERNEL__ */
 174
 175 typedef struct sigaltstack {
 176         void *ss_sp;
 177         int ss_flags;
 178         size_t ss_size;
 179 } stack_t;
 180
 181 #ifdef __KERNEL__
 182 #include <asm/sigcontext.h>
 183 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 184
 185 #endif  /* __KERNEL__ */
 186 #endif  /* __ASSEMBLY__ */
 187 #endif  /* _XTENSA_SIGNAL_H */