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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_SIGNAL_H
3#define _ASM_X86_SIGNAL_H
4
5#ifndef __ASSEMBLER__
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 /* __ASSEMBLER__ */
32#include <uapi/asm/signal.h>
33#ifndef __ASSEMBLER__
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" : "=@ccc"(ret) : "m"(*set), "Ir"(_sig-1));
87 return ret;
88}
89
90#define sigismember(set, sig) \
91 (__builtin_constant_p(sig) \
92 ? __const_sigismember((set), (sig)) \
93 : __gen_sigismember((set), (sig)))
94
95struct pt_regs;
96
97#else /* __i386__ */
98
99#undef __HAVE_ARCH_SIG_BITOPS
100
101#endif /* !__i386__ */
102
103#endif /* __ASSEMBLER__ */
104#endif /* _ASM_X86_SIGNAL_H */
105

source code of linux/arch/x86/include/asm/signal.h