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