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#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
49static inline void __gen_sigaddset(sigset_t *set, int _sig)
50{
51	asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
52}
53
54static 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
66static inline void __gen_sigdelset(sigset_t *set, int _sig)
67{
68	asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
69}
70
71static 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
77static 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
83static 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
96struct 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