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 /* non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame */
  27 #define SA_IA32_ABI     0x02000000u
  28 #define SA_X32_ABI      0x01000000u
  29
  30 #ifndef CONFIG_COMPAT
  31 typedef sigset_t compat_sigset_t;
  32 #endif
  33
  34 #endif /* __ASSEMBLY__ */
  35 #include <uapi/asm/signal.h>
  36 #ifndef __ASSEMBLY__
  37 extern void do_signal(struct pt_regs *regs);
  38
  39 #define __ARCH_HAS_SA_RESTORER
  40
  41 #include <uapi/asm/sigcontext.h>
  42
  43 #ifdef __i386__
  44
  45 #define __HAVE_ARCH_SIG_BITOPS
  46
  47 #define sigaddset(set,sig)                  \
  48         (__builtin_constant_p(sig)          \
  49          ? __const_sigaddset((set), (sig))  \
  50          : __gen_sigaddset((set), (sig)))
  51
  52 static inline void __gen_sigaddset(sigset_t *set, int _sig)
  53 {
  54         asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  55 }
  56
  57 static inline void __const_sigaddset(sigset_t *set, int _sig)
  58 {
  59         unsigned long sig = _sig - 1;
  60         set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
  61 }
  62
  63 #define sigdelset(set, sig)                 \
  64         (__builtin_constant_p(sig)          \
  65          ? __const_sigdelset((set), (sig))  \
  66          : __gen_sigdelset((set), (sig)))
  67
  68
  69 static inline void __gen_sigdelset(sigset_t *set, int _sig)
  70 {
  71         asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  72 }
  73
  74 static inline void __const_sigdelset(sigset_t *set, int _sig)
  75 {
  76         unsigned long sig = _sig - 1;
  77         set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
  78 }
  79
  80 static inline int __const_sigismember(sigset_t *set, int _sig)
  81 {
  82         unsigned long sig = _sig - 1;
  83         return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
  84 }
  85
  86 static inline int __gen_sigismember(sigset_t *set, int _sig)
  87 {
  88         unsigned char ret;
  89         asm("btl %2,%1\n\tsetc %0"
  90             : "=qm"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
  91         return ret;
  92 }
  93
  94 #define sigismember(set, sig)                   \
  95         (__builtin_constant_p(sig)              \
  96          ? __const_sigismember((set), (sig))    \
  97          : __gen_sigismember((set), (sig)))
  98
  99 struct pt_regs;
 100
 101 #else /* __i386__ */
 102
 103 #undef __HAVE_ARCH_SIG_BITOPS
 104
 105 #endif /* !__i386__ */
 106
 107 #endif /* __ASSEMBLY__ */
 108 #endif /* _ASM_X86_SIGNAL_H */