arch/m68k/include/asm/signal.h

   1 #ifndef _M68K_SIGNAL_H
   2 #define _M68K_SIGNAL_H
   3
   4 #include <linux/types.h>
   5
   6 /* Avoid too many header ordering problems.  */
   7 struct 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
  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 #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
  72
  73 /*
  74  * SA_FLAGS values:
  75  *
  76  * SA_ONSTACK indicates that a registered stack_t will be used.
  77  * SA_RESTART flag to get restarting signals (which were the default long ago)
  78  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  79  * SA_RESETHAND clears the handler when the signal is delivered.
  80  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  81  * SA_NODEFER prevents the current signal from being masked in the handler.
  82  *
  83  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  84  * Unix names RESETHAND and NODEFER respectively.
  85  */
  86 #define SA_NOCLDSTOP    0x00000001
  87 #define SA_NOCLDWAIT    0x00000002
  88 #define SA_SIGINFO      0x00000004
  89 #define SA_ONSTACK      0x08000000
  90 #define SA_RESTART      0x10000000
  91 #define SA_NODEFER      0x40000000
  92 #define SA_RESETHAND    0x80000000
  93
  94 #define SA_NOMASK       SA_NODEFER
  95 #define SA_ONESHOT      SA_RESETHAND
  96
  97 /*
  98  * sigaltstack controls
  99  */
 100 #define SS_ONSTACK      1
 101 #define SS_DISABLE      2
 102
 103 #define MINSIGSTKSZ     2048
 104 #define SIGSTKSZ        8192
 105
 106 #include <asm-generic/signal-defs.h>
 107
 108 #ifdef __KERNEL__
 109 struct old_sigaction {
 110         __sighandler_t sa_handler;
 111         old_sigset_t sa_mask;
 112         unsigned long sa_flags;
 113         __sigrestore_t sa_restorer;
 114 };
 115
 116 struct sigaction {
 117         __sighandler_t sa_handler;
 118         unsigned long sa_flags;
 119         __sigrestore_t sa_restorer;
 120         sigset_t sa_mask;               /* mask last for extensibility */
 121 };
 122
 123 struct k_sigaction {
 124         struct sigaction sa;
 125 };
 126 #else
 127 /* Here we must cater to libcs that poke about in kernel headers.  */
 128
 129 struct sigaction {
 130         union {
 131           __sighandler_t _sa_handler;
 132           void (*_sa_sigaction)(int, struct siginfo *, void *);
 133         } _u;
 134         sigset_t sa_mask;
 135         unsigned long sa_flags;
 136         void (*sa_restorer)(void);
 137 };
 138
 139 #define sa_handler      _u._sa_handler
 140 #define sa_sigaction    _u._sa_sigaction
 141
 142 #endif /* __KERNEL__ */
 143
 144 typedef struct sigaltstack {
 145         void __user *ss_sp;
 146         int ss_flags;
 147         size_t ss_size;
 148 } stack_t;
 149
 150 #ifdef __KERNEL__
 151 #include <asm/sigcontext.h>
 152
 153 #ifndef __uClinux__
 154 #define __HAVE_ARCH_SIG_BITOPS
 155
 156 static inline void sigaddset(sigset_t *set, int _sig)
 157 {
 158         asm ("bfset %0{%1,#1}"
 159                 : "+od" (*set)
 160                 : "id" ((_sig - 1) ^ 31)
 161                 : "cc");
 162 }
 163
 164 static inline void sigdelset(sigset_t *set, int _sig)
 165 {
 166         asm ("bfclr %0{%1,#1}"
 167                 : "+od" (*set)
 168                 : "id" ((_sig - 1) ^ 31)
 169                 : "cc");
 170 }
 171
 172 static inline int __const_sigismember(sigset_t *set, int _sig)
 173 {
 174         unsigned long sig = _sig - 1;
 175         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
 176 }
 177
 178 static inline int __gen_sigismember(sigset_t *set, int _sig)
 179 {
 180         int ret;
 181         asm ("bfextu %1{%2,#1},%0"
 182                 : "=d" (ret)
 183                 : "od" (*set), "id" ((_sig-1) ^ 31)
 184                 : "cc");
 185         return ret;
 186 }
 187
 188 #define sigismember(set,sig)                    \
 189         (__builtin_constant_p(sig) ?            \
 190          __const_sigismember(set,sig) :         \
 191          __gen_sigismember(set,sig))
 192
 193 static inline int sigfindinword(unsigned long word)
 194 {
 195         asm ("bfffo %1{#0,#0},%0"
 196                 : "=d" (word)
 197                 : "d" (word & -word)
 198                 : "cc");
 199         return word ^ 31;
 200 }
 201
 202 struct pt_regs;
 203 extern void ptrace_signal_deliver(struct pt_regs *regs, void *cookie);
 204
 205 #else
 206
 207 #undef __HAVE_ARCH_SIG_BITOPS
 208 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 209
 210 #endif /* __uClinux__ */
 211 #endif /* __KERNEL__ */
 212
 213 #endif /* _M68K_SIGNAL_H */