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#ifndef CONFIG_COMPAT
32typedef sigset_t compat_sigset_t;
33#endif
34
35#endif /* __ASSEMBLY__ */
36#include <uapi/asm/signal.h>
37#ifndef __ASSEMBLY__
38
39#define __ARCH_HAS_SA_RESTORER
40
41#include <asm/asm.h>
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
53static inline void __gen_sigaddset(sigset_t *set, int _sig)
54{
55	asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
56}
57
58static 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
70static inline void __gen_sigdelset(sigset_t *set, int _sig)
71{
72	asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
73}
74
75static 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
81static 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
87static inline int __gen_sigismember(sigset_t *set, int _sig)
88{
89	bool ret;
90	asm("btl %2,%1" CC_SET(c)
91	    : CC_OUT(c) (ret) : "m"(*set), "Ir"(_sig-1));
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
100struct 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