include/asm-i386/signal.h

   1 #ifndef _ASMi386_SIGNAL_H
   2 #define _ASMi386_SIGNAL_H
   3
   4 #include <linux/types.h>
   5 #include <linux/linkage.h>
   6 #include <linux/time.h>
   7 #include <linux/compiler.h>
   8
   9 /* Avoid too many header ordering problems.  */
  10 struct siginfo;
  11
  12 #ifdef __KERNEL__
  13 /* Most things should be clean enough to redefine this at will, if care
  14    is taken to make libc match.  */
  15
  16 #define _NSIG           64
  17 #define _NSIG_BPW       32
  18 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  19
  20 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  21
  22 typedef struct {
  23         unsigned long sig[_NSIG_WORDS];
  24 } sigset_t;
  25
  26 #else
  27 /* Here we must cater to libcs that poke about in kernel headers.  */
  28
  29 #define NSIG            32
  30 typedef unsigned long sigset_t;
  31
  32 #endif /* __KERNEL__ */
  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 /*
  66 #define SIGLOST         29
  67 */
  68 #define SIGPWR          30
  69 #define SIGSYS          31
  70 #define SIGUNUSED       31
  71
  72 /* These should not be considered constants from userland.  */
  73 #define SIGRTMIN        32
  74 #define SIGRTMAX        _NSIG
  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 #define SA_NOCLDSTOP    0x00000001u
  91 #define SA_NOCLDWAIT    0x00000002u
  92 #define SA_SIGINFO      0x00000004u
  93 #define SA_ONSTACK      0x08000000u
  94 #define SA_RESTART      0x10000000u
  95 #define SA_NODEFER      0x40000000u
  96 #define SA_RESETHAND    0x80000000u
  97
  98 #define SA_NOMASK       SA_NODEFER
  99 #define SA_ONESHOT      SA_RESETHAND
 100 #define SA_INTERRUPT    0x20000000 /* dummy -- ignored */
 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__
 116 struct 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
 123 struct 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
 130 struct k_sigaction {
 131         struct sigaction sa;
 132 };
 133 #else
 134 /* Here we must cater to libcs that poke about in kernel headers.  */
 135
 136 struct 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
 151 typedef 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
 167 static __inline__ void __gen_sigaddset(sigset_t *set, int _sig)
 168 {
 169         __asm__("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 170 }
 171
 172 static __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
 184 static __inline__ void __gen_sigdelset(sigset_t *set, int _sig)
 185 {
 186         __asm__("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 187 }
 188
 189 static __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
 195 static __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
 201 static __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
 214 static __inline__ int sigfindinword(unsigned long word)
 215 {
 216         __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
 217         return word;
 218 }
 219
 220 struct 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