include/asm-x86_64/signal.h

   1 #ifndef _ASMx8664_SIGNAL_H
   2 #define _ASMx8664_SIGNAL_H
   3
   4 #ifndef __ASSEMBLY__
   5 #include <linux/types.h>
   6 #include <linux/linkage.h>
   7 #include <linux/time.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       64
  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
  27 struct pt_regs;
  28 asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
  29
  30
  31 #else
  32 /* Here we must cater to libcs that poke about in kernel headers.  */
  33
  34 #define NSIG            32
  35 typedef unsigned long sigset_t;
  36
  37 #endif /* __KERNEL__ */
  38 #endif
  39
  40 #define SIGHUP           1
  41 #define SIGINT           2
  42 #define SIGQUIT          3
  43 #define SIGILL           4
  44 #define SIGTRAP          5
  45 #define SIGABRT          6
  46 #define SIGIOT           6
  47 #define SIGBUS           7
  48 #define SIGFPE           8
  49 #define SIGKILL          9
  50 #define SIGUSR1         10
  51 #define SIGSEGV         11
  52 #define SIGUSR2         12
  53 #define SIGPIPE         13
  54 #define SIGALRM         14
  55 #define SIGTERM         15
  56 #define SIGSTKFLT       16
  57 #define SIGCHLD         17
  58 #define SIGCONT         18
  59 #define SIGSTOP         19
  60 #define SIGTSTP         20
  61 #define SIGTTIN         21
  62 #define SIGTTOU         22
  63 #define SIGURG          23
  64 #define SIGXCPU         24
  65 #define SIGXFSZ         25
  66 #define SIGVTALRM       26
  67 #define SIGPROF         27
  68 #define SIGWINCH        28
  69 #define SIGIO           29
  70 #define SIGPOLL         SIGIO
  71 /*
  72 #define SIGLOST         29
  73 */
  74 #define SIGPWR          30
  75 #define SIGSYS          31
  76 #define SIGUNUSED       31
  77
  78 /* These should not be considered constants from userland.  */
  79 #define SIGRTMIN        32
  80 #define SIGRTMAX        _NSIG
  81
  82 /*
  83  * SA_FLAGS values:
  84  *
  85  * SA_ONSTACK indicates that a registered stack_t will be used.
  86  * SA_INTERRUPT is a no-op, but left due to historical reasons. Use the
  87  * SA_RESTART flag to get restarting signals (which were the default long ago)
  88  * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
  89  * SA_RESETHAND clears the handler when the signal is delivered.
  90  * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
  91  * SA_NODEFER prevents the current signal from being masked in the handler.
  92  *
  93  * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
  94  * Unix names RESETHAND and NODEFER respectively.
  95  */
  96 #define SA_NOCLDSTOP    0x00000001
  97 #define SA_NOCLDWAIT    0x00000002
  98 #define SA_SIGINFO      0x00000004
  99 #define SA_ONSTACK      0x08000000
 100 #define SA_RESTART      0x10000000
 101 #define SA_NODEFER      0x40000000
 102 #define SA_RESETHAND    0x80000000
 103
 104 #define SA_NOMASK       SA_NODEFER
 105 #define SA_ONESHOT      SA_RESETHAND
 106 #define SA_INTERRUPT    0x20000000 /* dummy -- ignored */
 107
 108 #define SA_RESTORER     0x04000000
 109
 110 /*
 111  * sigaltstack controls
 112  */
 113 #define SS_ONSTACK      1
 114 #define SS_DISABLE      2
 115
 116 #define MINSIGSTKSZ     2048
 117 #define SIGSTKSZ        8192
 118
 119 #ifdef __KERNEL__
 120
 121 /*
 122  * These values of sa_flags are used only by the kernel as part of the
 123  * irq handling routines.
 124  *
 125  * SA_INTERRUPT is also used by the irq handling routines.
 126  * SA_SHIRQ is for shared interrupt support on PCI and EISA.
 127  */
 128 #define SA_PROBE                SA_ONESHOT
 129 #define SA_SAMPLE_RANDOM        SA_RESTART
 130 #define SA_SHIRQ                0x04000000
 131 #endif
 132
 133 #define SIG_BLOCK          0    /* for blocking signals */
 134 #define SIG_UNBLOCK        1    /* for unblocking signals */
 135 #define SIG_SETMASK        2    /* for setting the signal mask */
 136
 137 #ifndef __ASSEMBLY__
 138 /* Type of a signal handler.  */
 139 typedef void __signalfn_t(int);
 140 typedef __signalfn_t __user *__sighandler_t;
 141
 142 typedef void __restorefn_t(void);
 143 typedef __restorefn_t __user *__sigrestore_t;
 144
 145 #define SIG_DFL ((__sighandler_t)0)     /* default signal handling */
 146 #define SIG_IGN ((__sighandler_t)1)     /* ignore signal */
 147 #define SIG_ERR ((__sighandler_t)-1)    /* error return from signal */
 148
 149 struct sigaction {
 150         __sighandler_t sa_handler;
 151         unsigned long sa_flags;
 152         __sigrestore_t sa_restorer;
 153         sigset_t sa_mask;               /* mask last for extensibility */
 154 };
 155
 156 struct k_sigaction {
 157         struct sigaction sa;
 158 };
 159
 160 typedef struct sigaltstack {
 161         void __user *ss_sp;
 162         int ss_flags;
 163         size_t ss_size;
 164 } stack_t;
 165
 166 #ifdef __KERNEL__
 167 #include <asm/sigcontext.h>
 168
 169 #undef __HAVE_ARCH_SIG_BITOPS
 170 #if 0
 171
 172 extern __inline__ void sigaddset(sigset_t *set, int _sig)
 173 {
 174         __asm__("btsq %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
 175 }
 176
 177 extern __inline__ void sigdelset(sigset_t *set, int _sig)
 178 {
 179         __asm__("btrq %1,%0" : "=m"(*set) : "Ir"(_sig - 1) : "cc");
 180 }
 181
 182 extern __inline__ int __const_sigismember(sigset_t *set, int _sig)
 183 {
 184         unsigned long sig = _sig - 1;
 185         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig & ~(_NSIG_BPW-1)));
 186 }
 187
 188 extern __inline__ int __gen_sigismember(sigset_t *set, int _sig)
 189 {
 190         int ret;
 191         __asm__("btq %2,%1\n\tsbbq %0,%0"
 192                 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
 193         return ret;
 194 }
 195
 196 #define sigismember(set,sig)                    \
 197         (__builtin_constant_p(sig) ?            \
 198          __const_sigismember((set),(sig)) :     \
 199          __gen_sigismember((set),(sig)))
 200
 201 extern __inline__ int sigfindinword(unsigned long word)
 202 {
 203         __asm__("bsfq %1,%0" : "=r"(word) : "rm"(word) : "cc");
 204         return word;
 205 }
 206 #endif
 207 #endif
 208
 209 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 210
 211 #endif /* __KERNEL__ */
 212
 213 #endif