LXR linux/arch/x86/include/asm/signal.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_X86_SIGNAL_H
   3#define _ASM_X86_SIGNAL_H
   4
   5#ifndef __ASSEMBLY__
   6#include <linux/linkage.h>
   7
   8/* Most things should be clean enough to redefine this at will, if care
   9   is taken to make libc match.  */
  10
  11#define _NSIG           64
  12
  13#ifdef __i386__
  14# define _NSIG_BPW      32
  15#else
  16# define _NSIG_BPW      64
  17#endif
  18
  19#define _NSIG_WORDS     (_NSIG / _NSIG_BPW)
  20
  21typedef unsigned long old_sigset_t;             /* at least 32 bits */
  22
  23typedef struct {
  24        unsigned long sig[_NSIG_WORDS];
  25} sigset_t;
  26
  27/* non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame */
  28#define SA_IA32_ABI     0x02000000u
  29#define SA_X32_ABI      0x01000000u
  30
  31#ifndef CONFIG_COMPAT
  32#define compat_sigset_t compat_sigset_t
  33typedef sigset_t compat_sigset_t;
  34#endif
  35
  36#endif /* __ASSEMBLY__ */
  37#include <uapi/asm/signal.h>
  38#ifndef __ASSEMBLY__
  39
  40#define __ARCH_HAS_SA_RESTORER
  41
  42#include <asm/asm.h>
  43#include <uapi/asm/sigcontext.h>
  44
  45#ifdef __i386__
  46
  47#define __HAVE_ARCH_SIG_BITOPS
  48
  49#define sigaddset(set,sig)                  \
  50        (__builtin_constant_p(sig)          \
  51         ? __const_sigaddset((set), (sig))  \
  52         : __gen_sigaddset((set), (sig)))
  53
  54static inline void __gen_sigaddset(sigset_t *set, int _sig)
  55{
  56        asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  57}
  58
  59static inline void __const_sigaddset(sigset_t *set, int _sig)
  60{
  61        unsigned long sig = _sig - 1;
  62        set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
  63}
  64
  65#define sigdelset(set, sig)                 \
  66        (__builtin_constant_p(sig)          \
  67         ? __const_sigdelset((set), (sig))  \
  68         : __gen_sigdelset((set), (sig)))
  69
  70
  71static inline void __gen_sigdelset(sigset_t *set, int _sig)
  72{
  73        asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  74}
  75
  76static inline void __const_sigdelset(sigset_t *set, int _sig)
  77{
  78        unsigned long sig = _sig - 1;
  79        set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
  80}
  81
  82static inline int __const_sigismember(sigset_t *set, int _sig)
  83{
  84        unsigned long sig = _sig - 1;
  85        return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
  86}
  87
  88static inline int __gen_sigismember(sigset_t *set, int _sig)
  89{
  90        bool ret;
  91        asm("btl %2,%1" CC_SET(c)
  92            : CC_OUT(c) (ret) : "m"(*set), "Ir"(_sig-1));
  93        return ret;
  94}
  95
  96#define sigismember(set, sig)                   \
  97        (__builtin_constant_p(sig)              \
  98         ? __const_sigismember((set), (sig))    \
  99         : __gen_sigismember((set), (sig)))
 100
 101struct pt_regs;
 102
 103#else /* __i386__ */
 104
 105#undef __HAVE_ARCH_SIG_BITOPS
 106
 107#endif /* !__i386__ */
 108
 109#endif /* __ASSEMBLY__ */
 110#endif /* _ASM_X86_SIGNAL_H */
 111