include/asm-x86/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.h>
 121
 122 #ifndef __ASSEMBLY__
 123
 124 #ifdef __i386__
 125 # ifdef __KERNEL__
 126 struct old_sigaction {
 127         __sighandler_t sa_handler;
 128         old_sigset_t sa_mask;
 129         unsigned long sa_flags;
 130         __sigrestore_t sa_restorer;
 131 };
 132
 133 struct sigaction {
 134         __sighandler_t sa_handler;
 135         unsigned long sa_flags;
 136         __sigrestore_t sa_restorer;
 137         sigset_t sa_mask;               /* mask last for extensibility */
 138 };
 139
 140 struct k_sigaction {
 141         struct sigaction sa;
 142 };
 143 # else /* __KERNEL__ */
 144 /* Here we must cater to libcs that poke about in kernel headers.  */
 145
 146 struct sigaction {
 147         union {
 148           __sighandler_t _sa_handler;
 149           void (*_sa_sigaction)(int, struct siginfo *, void *);
 150         } _u;
 151         sigset_t sa_mask;
 152         unsigned long sa_flags;
 153         void (*sa_restorer)(void);
 154 };
 155
 156 #define sa_handler      _u._sa_handler
 157 #define sa_sigaction    _u._sa_sigaction
 158
 159 # endif /* ! __KERNEL__ */
 160 #else /* __i386__ */
 161
 162 struct sigaction {
 163         __sighandler_t sa_handler;
 164         unsigned long sa_flags;
 165         __sigrestore_t sa_restorer;
 166         sigset_t sa_mask;               /* mask last for extensibility */
 167 };
 168
 169 struct k_sigaction {
 170         struct sigaction sa;
 171 };
 172
 173 #endif /* !__i386__ */
 174
 175 typedef struct sigaltstack {
 176         void __user *ss_sp;
 177         int ss_flags;
 178         size_t ss_size;
 179 } stack_t;
 180
 181 #ifdef __KERNEL__
 182 #include <asm/sigcontext.h>
 183
 184 #ifdef __386__
 185
 186 #define __HAVE_ARCH_SIG_BITOPS
 187
 188 #define sigaddset(set,sig)                 \
 189         (__builtin_constantp(sig) ?        \
 190          __const_sigaddset((set),(sig)) :  \
 191          __gen_sigaddset((set),(sig)))
 192
 193 static __inline__ void __gen_sigaddset(sigset_t *set, int _sig)
 194 {
 195         __asm__("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 196 }
 197
 198 static __inline__ void __const_sigaddset(sigset_t *set, int _sig)
 199 {
 200         unsigned long sig = _sig - 1;
 201         set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
 202 }
 203
 204 #define sigdelset(set,sig)                 \
 205         (__builtin_constant_p(sig) ?       \
 206          __const_sigdelset((set),(sig)) :  \
 207          __gen_sigdelset((set),(sig)))
 208
 209
 210 static __inline__ void __gen_sigdelset(sigset_t *set, int _sig)
 211 {
 212         __asm__("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
 213 }
 214
 215 static __inline__ void __const_sigdelset(sigset_t *set, int _sig)
 216 {
 217         unsigned long sig = _sig - 1;
 218         set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
 219 }
 220
 221 static __inline__ int __const_sigismember(sigset_t *set, int _sig)
 222 {
 223         unsigned long sig = _sig - 1;
 224         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
 225 }
 226
 227 static __inline__ int __gen_sigismember(sigset_t *set, int _sig)
 228 {
 229         int ret;
 230         __asm__("btl %2,%1\n\tsbbl %0,%0"
 231                 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
 232         return ret;
 233 }
 234
 235 #define sigismember(set,sig)                    \
 236         (__builtin_constant_p(sig) ?            \
 237          __const_sigismember((set),(sig)) :     \
 238          __gen_sigismember((set),(sig)))
 239
 240 static __inline__ int sigfindinword(unsigned long word)
 241 {
 242         __asm__("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
 243         return word;
 244 }
 245
 246 struct pt_regs;
 247
 248 #define ptrace_signal_deliver(regs, cookie)             \
 249         do {                                            \
 250                 if (current->ptrace & PT_DTRACE) {      \
 251                         current->ptrace &= ~PT_DTRACE;  \
 252                         (regs)->eflags &= ~TF_MASK;     \
 253                 }                                       \
 254         } while (0)
 255
 256 #else /* __i386__ */
 257
 258 #undef __HAVE_ARCH_SIG_BITOPS
 259
 260 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 261
 262 #endif /* !__i386__ */
 263 #endif /* __KERNEL__ */
 264 #endif /* __ASSEMBLY__ */
 265
 266 #endif