linux/include/asm-i386/signal.h
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   1#ifndef _ASMi386_SIGNAL_H
   2#define _ASMi386_SIGNAL_H
   3
   4#include <linux/types.h>
   5#include <linux/time.h>
   6#include <linux/compiler.h>
   7
   8/* Avoid too many header ordering problems.  */
   9struct siginfo;
  10
  11#ifdef __KERNEL__
  12
  13#include <linux/linkage.h>
  14
  15/* Most things should be clean enough to redefine this at will, if care
  16   is taken to make libc match.  */
  17
  18#define _NSIG           64
  19#define _NSIG_BPW       32
  20#define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  21
  22typedef unsigned long old_sigset_t;             /* at least 32 bits */
  23
  24typedef struct {
  25        unsigned long sig[_NSIG_WORDS];
  26} sigset_t;
  27
  28#else
  29/* Here we must cater to libcs that poke about in kernel headers.  */
  30
  31#define NSIG            32
  32typedef unsigned long sigset_t;
  33
  34#endif /* __KERNEL__ */
  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 SIGIOT           6
  43#define SIGBUS           7
  44#define SIGFPE           8
  45#define SIGKILL          9
  46#define SIGUSR1         10
  47#define SIGSEGV         11
  48#define SIGUSR2         12
  49#define SIGPIPE         13
  50#define SIGALRM         14
  51#define SIGTERM         15
  52#define SIGSTKFLT       16
  53#define SIGCHLD         17
  54#define SIGCONT         18
  55#define SIGSTOP         19
  56#define SIGTSTP         20
  57#define SIGTTIN         21
  58#define SIGTTOU         22
  59#define SIGURG          23
  60#define SIGXCPU         24
  61#define SIGXFSZ         25
  62#define SIGVTALRM       26
  63#define SIGPROF         27
  64#define SIGWINCH        28
  65#define SIGIO           29
  66#define SIGPOLL         SIGIO
  67/*
  68#define SIGLOST         29
  69*/
  70#define SIGPWR          30
  71#define SIGSYS          31
  72#define SIGUNUSED       31
  73
  74/* These should not be considered constants from userland.  */
  75#define SIGRTMIN        32
  76#define SIGRTMAX        _NSIG
  77
  78/*
  79 * SA_FLAGS values:
  80 *
  81 * SA_ONSTACK indicates that a registered stack_t will be used.
  82 * SA_RESTART flag to get restarting signals (which were the default long ago)
  83 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  84 * SA_RESETHAND clears the handler when the signal is delivered.
  85 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  86 * SA_NODEFER prevents the current signal from being masked in the handler.
  87 *
  88 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  89 * Unix names RESETHAND and NODEFER respectively.
  90 */
  91#define SA_NOCLDSTOP    0x00000001u
  92#define SA_NOCLDWAIT    0x00000002u
  93#define SA_SIGINFO      0x00000004u
  94#define SA_ONSTACK      0x08000000u
  95#define SA_RESTART      0x10000000u
  96#define SA_NODEFER      0x40000000u
  97#define SA_RESETHAND    0x80000000u
  98
  99#define SA_NOMASK       SA_NODEFER
 100#define SA_ONESHOT      SA_RESETHAND
 101
 102#define SA_RESTORER     0x04000000
 103
 104/* 
 105 * sigaltstack controls
 106 */
 107#define SS_ONSTACK      1
 108#define SS_DISABLE      2
 109
 110#define MINSIGSTKSZ     2048
 111#define SIGSTKSZ        8192
 112
 113#include <asm-generic/signal.h>
 114
 115#ifdef __KERNEL__
 116struct old_sigaction {
 117        __sighandler_t sa_handler;
 118        old_sigset_t sa_mask;
 119        unsigned long sa_flags;
 120        __sigrestore_t sa_restorer;
 121};
 122
 123struct sigaction {
 124        __sighandler_t sa_handler;
 125        unsigned long sa_flags;
 126        __sigrestore_t sa_restorer;
 127        sigset_t sa_mask;               /* mask last for extensibility */
 128};
 129
 130struct k_sigaction {
 131        struct sigaction sa;
 132};
 133#else
 134/* Here we must cater to libcs that poke about in kernel headers.  */
 135
 136struct sigaction {
 137        union {
 138          __sighandler_t _sa_handler;
 139          void (*_sa_sigaction)(int, struct siginfo *, void *);
 140        } _u;
 141        sigset_t sa_mask;
 142        unsigned long sa_flags;
 143        void (*sa_restorer)(void);
 144};
 145
 146#define sa_handler      _u._sa_handler
 147#define sa_sigaction    _u._sa_sigaction
 148
 149#endif /* __KERNEL__ */
 150
 151typedef struct sigaltstack {
 152        void __user *ss_sp;
 153        int ss_flags;
 154        size_t ss_size;
 155} stack_t;
 156
 157#ifdef __KERNEL__
 158#include <asm/sigcontext.h>
 159
 160#define __HAVE_ARCH_SIG_BITOPS
 161
 162#define sigaddset(set,sig)                 \
 163        (__builtin_constant_p(sig) ?       \
 164        __const_sigaddset((set),(sig)) :   \
 165        __gen_sigaddset((set),(sig)))
 166
 167static __inline__ void __gen_sigaddset(sigset_t *set, int _sig)
 168{
 169        __asm__("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 170}
 171
 172static __inline__ void __const_sigaddset(sigset_t *set, int _sig)
 173{
 174        unsigned long sig = _sig - 1;
 175        set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
 176}
 177
 178#define sigdelset(set,sig)                 \
 179        (__builtin_constant_p(sig) ?       \
 180        __const_sigdelset((set),(sig)) :   \
 181        __gen_sigdelset((set),(sig)))
 182
 183
 184static __inline__ void __gen_sigdelset(sigset_t *set, int _sig)
 185{
 186        __asm__("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 187}
 188
 189static __inline__ void __const_sigdelset(sigset_t *set, int _sig)
 190{
 191        unsigned long sig = _sig - 1;
 192        set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
 193}
 194
 195static __inline__ int __const_sigismember(sigset_t *set, int _sig)
 196{
 197        unsigned long sig = _sig - 1;
 198        return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
 199}
 200
 201static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
 202{
 203        int ret;
 204        __asm__("btl %2,%1\n\tsbbl %0,%0"
 205                : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
 206        return ret;
 207}
 208
 209#define sigismember(set,sig)                    \
 210        (__builtin_constant_p(sig) ?            \
 211         __const_sigismember((set),(sig)) :     \
 212         __gen_sigismember((set),(sig)))
 213
 214static __inline__ int sigfindinword(unsigned long word)
 215{
 216        __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
 217        return word;
 218}
 219
 220struct pt_regs;
 221
 222#define ptrace_signal_deliver(regs, cookie)             \
 223        do {                                            \
 224                if (current->ptrace & PT_DTRACE) {      \
 225                        current->ptrace &= ~PT_DTRACE;  \
 226                        (regs)->eflags &= ~TF_MASK;     \
 227                }                                       \
 228        } while (0)
 229
 230#endif /* __KERNEL__ */
 231
 232#endif
 233
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