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
  21 typedef unsigned long old_sigset_t;             /* at least 32 bits */
  22
  23 typedef 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 typedef sigset_t compat_sigset_t;
  33 #endif
  34
  35 #endif /* __ASSEMBLY__ */
  36 #include <uapi/asm/signal.h>
  37 #ifndef __ASSEMBLY__
  38 extern void do_signal(struct pt_regs *regs);
  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
  54 static inline void __gen_sigaddset(sigset_t *set, int _sig)
  55 {
  56         asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  57 }
  58
  59 static 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
  71 static inline void __gen_sigdelset(sigset_t *set, int _sig)
  72 {
  73         asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
  74 }
  75
  76 static 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
  82 static 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
  88 static 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
 101 struct 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 */