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
  32typedef sigset_t compat_sigset_t;
  33#endif
  34
  35#endif /* __ASSEMBLY__ */
  36#include <uapi/asm/signal.h>
  37#ifndef __ASSEMBLY__
  38extern void do_signal(struct pt_regs *regs);
  39
  40#define __ARCH_HAS_SA_RESTORER
  41
  42#include <uapi/asm/sigcontext.h>
  43
  44#ifdef __i386__
  45
  46#define __HAVE_ARCH_SIG_BITOPS
  47
  48#define sigaddset(set,sig)                  \
  49        (__builtin_constant_p(sig)          \
  50         ? __const_sigaddset((set), (sig))  \
  51         : __gen_sigaddset((set), (sig)))
  52
  53static inline void __gen_sigaddset(sigset_t *set, int _sig)
  54{
  55        asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  56}
  57
  58static inline void __const_sigaddset(sigset_t *set, int _sig)
  59{
  60        unsigned long sig = _sig - 1;
  61        set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
  62}
  63
  64#define sigdelset(set, sig)                 \
  65        (__builtin_constant_p(sig)          \
  66         ? __const_sigdelset((set), (sig))  \
  67         : __gen_sigdelset((set), (sig)))
  68
  69
  70static inline void __gen_sigdelset(sigset_t *set, int _sig)
  71{
  72        asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  73}
  74
  75static inline void __const_sigdelset(sigset_t *set, int _sig)
  76{
  77        unsigned long sig = _sig - 1;
  78        set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
  79}
  80
  81static inline int __const_sigismember(sigset_t *set, int _sig)
  82{
  83        unsigned long sig = _sig - 1;
  84        return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
  85}
  86
  87static inline int __gen_sigismember(sigset_t *set, int _sig)
  88{
  89        unsigned char ret;
  90        asm("btl %2,%1\n\tsetc %0"
  91            : "=qm"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
  92        return ret;
  93}
  94
  95#define sigismember(set, sig)                   \
  96        (__builtin_constant_p(sig)              \
  97         ? __const_sigismember((set), (sig))    \
  98         : __gen_sigismember((set), (sig)))
  99
 100struct pt_regs;
 101
 102#else /* __i386__ */
 103
 104#undef __HAVE_ARCH_SIG_BITOPS
 105
 106#endif /* !__i386__ */
 107
 108#endif /* __ASSEMBLY__ */
 109#endif /* _ASM_X86_SIGNAL_H */
 110