LXR linux/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
  20typedef unsigned long old_sigset_t;             /* at least 32 bits */
  21
  22typedef struct {
  23        unsigned long sig[_NSIG_WORDS];
  24} sigset_t;
  25
  26#ifndef CONFIG_COMPAT
  27typedef sigset_t compat_sigset_t;
  28#endif
  29
  30#endif /* __ASSEMBLY__ */
  31#include <uapi/asm/signal.h>
  32#ifndef __ASSEMBLY__
  33extern void do_signal(struct pt_regs *regs);
  34
  35#define __ARCH_HAS_SA_RESTORER
  36
  37#include <uapi/asm/sigcontext.h>
  38
  39#ifdef __i386__
  40
  41#define __HAVE_ARCH_SIG_BITOPS
  42
  43#define sigaddset(set,sig)                  \
  44        (__builtin_constant_p(sig)          \
  45         ? __const_sigaddset((set), (sig))  \
  46         : __gen_sigaddset((set), (sig)))
  47
  48static inline void __gen_sigaddset(sigset_t *set, int _sig)
  49{
  50        asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  51}
  52
  53static inline void __const_sigaddset(sigset_t *set, int _sig)
  54{
  55        unsigned long sig = _sig - 1;
  56        set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
  57}
  58
  59#define sigdelset(set, sig)                 \
  60        (__builtin_constant_p(sig)          \
  61         ? __const_sigdelset((set), (sig))  \
  62         : __gen_sigdelset((set), (sig)))
  63
  64
  65static inline void __gen_sigdelset(sigset_t *set, int _sig)
  66{
  67        asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  68}
  69
  70static inline void __const_sigdelset(sigset_t *set, int _sig)
  71{
  72        unsigned long sig = _sig - 1;
  73        set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
  74}
  75
  76static inline int __const_sigismember(sigset_t *set, int _sig)
  77{
  78        unsigned long sig = _sig - 1;
  79        return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
  80}
  81
  82static inline int __gen_sigismember(sigset_t *set, int _sig)
  83{
  84        int ret;
  85        asm("btl %2,%1\n\tsbbl %0,%0"
  86            : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
  87        return ret;
  88}
  89
  90#define sigismember(set, sig)                   \
  91        (__builtin_constant_p(sig)              \
  92         ? __const_sigismember((set), (sig))    \
  93         : __gen_sigismember((set), (sig)))
  94
  95struct pt_regs;
  96
  97#else /* __i386__ */
  98
  99#undef __HAVE_ARCH_SIG_BITOPS
 100
 101#endif /* !__i386__ */
 102
 103#endif /* __ASSEMBLY__ */
 104#endif /* _ASM_X86_SIGNAL_H */
 105