arch/x86/include/asm/signal.h

   1 #ifndef _ASM_X86_SIGNAL_H
   2 #define _ASM_X86_SIGNAL_H
   3
   4 #ifndef __ASSEMBLY__
   5 #include <linux/types.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 #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
  20 #ifdef __i386__
  21 # define _NSIG_BPW      32
  22 #else
  23 # define _NSIG_BPW      64
  24 #endif
  25
  26 #define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  27
  28 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  29
  30 typedef struct {
  31         unsigned long sig[_NSIG_WORDS];
  32 } sigset_t;
  33
  34 #else
  35 /* Here we must cater to libcs that poke about in kernel headers.  */
  36
  37 #define NSIG            32
  38 typedef unsigned long sigset_t;
  39
  40 #endif /* __KERNEL__ */
  41 #endif /* __ASSEMBLY__ */
  42
  43 #define SIGHUP           1
  44 #define SIGINT           2
  45 #define SIGQUIT          3
  46 #define SIGILL           4
  47 #define SIGTRAP          5
  48 #define SIGABRT          6
  49 #define SIGIOT           6
  50 #define SIGBUS           7
  51 #define SIGFPE           8
  52 #define SIGKILL          9
  53 #define SIGUSR1         10
  54 #define SIGSEGV         11
  55 #define SIGUSR2         12
  56 #define SIGPIPE         13
  57 #define SIGALRM         14
  58 #define SIGTERM         15
  59 #define SIGSTKFLT       16
  60 #define SIGCHLD         17
  61 #define SIGCONT         18
  62 #define SIGSTOP         19
  63 #define SIGTSTP         20
  64 #define SIGTTIN         21
  65 #define SIGTTOU         22
  66 #define SIGURG          23
  67 #define SIGXCPU         24
  68 #define SIGXFSZ         25
  69 #define SIGVTALRM       26
  70 #define SIGPROF         27
  71 #define SIGWINCH        28
  72 #define SIGIO           29
  73 #define SIGPOLL         SIGIO
  74 /*
  75 #define SIGLOST         29
  76 */
  77 #define SIGPWR          30
  78 #define SIGSYS          31
  79 #define SIGUNUSED       31
  80
  81 /* These should not be considered constants from userland.  */
  82 #define SIGRTMIN        32
  83 #define SIGRTMAX        _NSIG
  84
  85 /*
  86  * SA_FLAGS values:
  87  *
  88  * SA_ONSTACK indicates that a registered stack_t will be used.
  89  * SA_RESTART flag to get restarting signals (which were the default long ago)
  90  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  91  * SA_RESETHAND clears the handler when the signal is delivered.
  92  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  93  * SA_NODEFER prevents the current signal from being masked in the handler.
  94  *
  95  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  96  * Unix names RESETHAND and NODEFER respectively.
  97  */
  98 #define SA_NOCLDSTOP    0x00000001u
  99 #define SA_NOCLDWAIT    0x00000002u
 100 #define SA_SIGINFO      0x00000004u
 101 #define SA_ONSTACK      0x08000000u
 102 #define SA_RESTART      0x10000000u
 103 #define SA_NODEFER      0x40000000u
 104 #define SA_RESETHAND    0x80000000u
 105
 106 #define SA_NOMASK       SA_NODEFER
 107 #define SA_ONESHOT      SA_RESETHAND
 108
 109 #define SA_RESTORER     0x04000000
 110
 111 /*
 112  * sigaltstack controls
 113  */
 114 #define SS_ONSTACK      1
 115 #define SS_DISABLE      2
 116
 117 #define MINSIGSTKSZ     2048
 118 #define SIGSTKSZ        8192
 119
 120 #include <asm-generic/signal-defs.h>
 121
 122 #ifndef __ASSEMBLY__
 123
 124 # ifdef __KERNEL__
 125 extern void do_notify_resume(struct pt_regs *, void *, __u32);
 126 # endif /* __KERNEL__ */
 127
 128 #ifdef __i386__
 129 # ifdef __KERNEL__
 130 struct old_sigaction {
 131         __sighandler_t sa_handler;
 132         old_sigset_t sa_mask;
 133         unsigned long sa_flags;
 134         __sigrestore_t sa_restorer;
 135 };
 136
 137 struct sigaction {
 138         __sighandler_t sa_handler;
 139         unsigned long sa_flags;
 140         __sigrestore_t sa_restorer;
 141         sigset_t sa_mask;               /* mask last for extensibility */
 142 };
 143
 144 struct k_sigaction {
 145         struct sigaction sa;
 146 };
 147
 148 # else /* __KERNEL__ */
 149 /* Here we must cater to libcs that poke about in kernel headers.  */
 150
 151 struct sigaction {
 152         union {
 153           __sighandler_t _sa_handler;
 154           void (*_sa_sigaction)(int, struct siginfo *, void *);
 155         } _u;
 156         sigset_t sa_mask;
 157         unsigned long sa_flags;
 158         void (*sa_restorer)(void);
 159 };
 160
 161 #define sa_handler      _u._sa_handler
 162 #define sa_sigaction    _u._sa_sigaction
 163
 164 # endif /* ! __KERNEL__ */
 165 #else /* __i386__ */
 166
 167 struct sigaction {
 168         __sighandler_t sa_handler;
 169         unsigned long sa_flags;
 170         __sigrestore_t sa_restorer;
 171         sigset_t sa_mask;               /* mask last for extensibility */
 172 };
 173
 174 struct k_sigaction {
 175         struct sigaction sa;
 176 };
 177
 178 #endif /* !__i386__ */
 179
 180 typedef struct sigaltstack {
 181         void __user *ss_sp;
 182         int ss_flags;
 183         size_t ss_size;
 184 } stack_t;
 185
 186 #ifdef __KERNEL__
 187 #include <asm/sigcontext.h>
 188
 189 #ifdef __i386__
 190
 191 #define __HAVE_ARCH_SIG_BITOPS
 192
 193 #define sigaddset(set,sig)                  \
 194         (__builtin_constant_p(sig)          \
 195          ? __const_sigaddset((set), (sig))  \
 196          : __gen_sigaddset((set), (sig)))
 197
 198 static inline void __gen_sigaddset(sigset_t *set, int _sig)
 199 {
 200         asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 201 }
 202
 203 static inline void __const_sigaddset(sigset_t *set, int _sig)
 204 {
 205         unsigned long sig = _sig - 1;
 206         set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
 207 }
 208
 209 #define sigdelset(set, sig)                 \
 210         (__builtin_constant_p(sig)          \
 211          ? __const_sigdelset((set), (sig))  \
 212          : __gen_sigdelset((set), (sig)))
 213
 214
 215 static inline void __gen_sigdelset(sigset_t *set, int _sig)
 216 {
 217         asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 218 }
 219
 220 static inline void __const_sigdelset(sigset_t *set, int _sig)
 221 {
 222         unsigned long sig = _sig - 1;
 223         set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
 224 }
 225
 226 static inline int __const_sigismember(sigset_t *set, int _sig)
 227 {
 228         unsigned long sig = _sig - 1;
 229         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
 230 }
 231
 232 static inline int __gen_sigismember(sigset_t *set, int _sig)
 233 {
 234         int ret;
 235         asm("btl %2,%1\n\tsbbl %0,%0"
 236             : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
 237         return ret;
 238 }
 239
 240 #define sigismember(set, sig)                   \
 241         (__builtin_constant_p(sig)              \
 242          ? __const_sigismember((set), (sig))    \
 243          : __gen_sigismember((set), (sig)))
 244
 245 static inline int sigfindinword(unsigned long word)
 246 {
 247         asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
 248         return word;
 249 }
 250
 251 struct pt_regs;
 252
 253 #else /* __i386__ */
 254
 255 #undef __HAVE_ARCH_SIG_BITOPS
 256
 257 #endif /* !__i386__ */
 258
 259 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 260
 261 #endif /* __KERNEL__ */
 262 #endif /* __ASSEMBLY__ */
 263
 264 #endif /* _ASM_X86_SIGNAL_H */