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/linkage.h>
   6
   7 /* Most things should be clean enough to redefine this at will, if care
   8    is taken to make libc match.  */
   9
  10 #define _NSIG           64
  11
  12 #ifdef __i386__
  13 # define _NSIG_BPW      32
  14 #else
  15 # define _NSIG_BPW      64
  16 #endif
  17
  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 #ifndef CONFIG_COMPAT
  27 typedef sigset_t compat_sigset_t;
  28 #endif
  29
  30 #endif /* __ASSEMBLY__ */
  31 #include <uapi/asm/signal.h>
  32 #ifndef __ASSEMBLY__
  33 extern void do_notify_resume(struct pt_regs *, void *, __u32);
  34 #ifdef __i386__
  35 struct old_sigaction {
  36         __sighandler_t sa_handler;
  37         old_sigset_t sa_mask;
  38         unsigned long sa_flags;
  39         __sigrestore_t sa_restorer;
  40 };
  41
  42 struct sigaction {
  43         __sighandler_t sa_handler;
  44         unsigned long sa_flags;
  45         __sigrestore_t sa_restorer;
  46         sigset_t sa_mask;               /* mask last for extensibility */
  47 };
  48
  49 struct k_sigaction {
  50         struct sigaction sa;
  51 };
  52
  53 #else /* __i386__ */
  54 #endif /* !__i386__ */
  55 #include <asm/sigcontext.h>
  56
  57 #ifdef __i386__
  58
  59 #define __HAVE_ARCH_SIG_BITOPS
  60
  61 #define sigaddset(set,sig)                  \
  62         (__builtin_constant_p(sig)          \
  63          ? __const_sigaddset((set), (sig))  \
  64          : __gen_sigaddset((set), (sig)))
  65
  66 static inline void __gen_sigaddset(sigset_t *set, int _sig)
  67 {
  68         asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  69 }
  70
  71 static inline void __const_sigaddset(sigset_t *set, int _sig)
  72 {
  73         unsigned long sig = _sig - 1;
  74         set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
  75 }
  76
  77 #define sigdelset(set, sig)                 \
  78         (__builtin_constant_p(sig)          \
  79          ? __const_sigdelset((set), (sig))  \
  80          : __gen_sigdelset((set), (sig)))
  81
  82
  83 static inline void __gen_sigdelset(sigset_t *set, int _sig)
  84 {
  85         asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  86 }
  87
  88 static inline void __const_sigdelset(sigset_t *set, int _sig)
  89 {
  90         unsigned long sig = _sig - 1;
  91         set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
  92 }
  93
  94 static inline int __const_sigismember(sigset_t *set, int _sig)
  95 {
  96         unsigned long sig = _sig - 1;
  97         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
  98 }
  99
 100 static inline int __gen_sigismember(sigset_t *set, int _sig)
 101 {
 102         int ret;
 103         asm("btl %2,%1\n\tsbbl %0,%0"
 104             : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
 105         return ret;
 106 }
 107
 108 #define sigismember(set, sig)                   \
 109         (__builtin_constant_p(sig)              \
 110          ? __const_sigismember((set), (sig))    \
 111          : __gen_sigismember((set), (sig)))
 112
 113 static inline int sigfindinword(unsigned long word)
 114 {
 115         asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
 116         return word;
 117 }
 118
 119 struct pt_regs;
 120
 121 #else /* __i386__ */
 122
 123 #undef __HAVE_ARCH_SIG_BITOPS
 124
 125 #endif /* !__i386__ */
 126
 127 #endif /* __ASSEMBLY__ */
 128 #endif /* _ASM_X86_SIGNAL_H */