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/* 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
  31typedef sigset_t compat_sigset_t;
  32#endif
  33
  34#endif /* __ASSEMBLY__ */
  35#include <uapi/asm/signal.h>
  36#ifndef __ASSEMBLY__
  37extern 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
  52static inline void __gen_sigaddset(sigset_t *set, int _sig)
  53{
  54        asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  55}
  56
  57static 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
  69static inline void __gen_sigdelset(sigset_t *set, int _sig)
  70{
  71        asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  72}
  73
  74static 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
  80static 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
  86static 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
  99struct 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 */
 109