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__
38extern 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
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 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
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