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 <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 53 static inline void __gen_sigaddset(sigset_t *set, int _sig) 54 { 55 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc"); 56 } 57 58 static 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 70 static inline void __gen_sigdelset(sigset_t *set, int _sig) 71 { 72 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc"); 73 } 74 75 static 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 81 static 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 87 static 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))) 99 100 struct 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