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 */ 111