xref: /openbmc/linux/arch/x86/include/asm/signal.h (revision b34e08d5)
1 #ifndef _ASM_X86_SIGNAL_H
2 #define _ASM_X86_SIGNAL_H
3 
4 #ifndef __ASSEMBLY__
5 #include <linux/linkage.h>
6 
7 /* Most things should be clean enough to redefine this at will, if care
8    is taken to make libc match.  */
9 
10 #define _NSIG		64
11 
12 #ifdef __i386__
13 # define _NSIG_BPW	32
14 #else
15 # define _NSIG_BPW	64
16 #endif
17 
18 #define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
19 
20 typedef unsigned long old_sigset_t;		/* at least 32 bits */
21 
22 typedef struct {
23 	unsigned long sig[_NSIG_WORDS];
24 } sigset_t;
25 
26 #ifndef CONFIG_COMPAT
27 typedef sigset_t compat_sigset_t;
28 #endif
29 
30 #endif /* __ASSEMBLY__ */
31 #include <uapi/asm/signal.h>
32 #ifndef __ASSEMBLY__
33 extern void do_notify_resume(struct pt_regs *, void *, __u32);
34 
35 #define __ARCH_HAS_SA_RESTORER
36 
37 #include <asm/sigcontext.h>
38 
39 #ifdef __i386__
40 
41 #define __HAVE_ARCH_SIG_BITOPS
42 
43 #define sigaddset(set,sig)		    \
44 	(__builtin_constant_p(sig)	    \
45 	 ? __const_sigaddset((set), (sig))  \
46 	 : __gen_sigaddset((set), (sig)))
47 
48 static inline void __gen_sigaddset(sigset_t *set, int _sig)
49 {
50 	asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
51 }
52 
53 static inline void __const_sigaddset(sigset_t *set, int _sig)
54 {
55 	unsigned long sig = _sig - 1;
56 	set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
57 }
58 
59 #define sigdelset(set, sig)		    \
60 	(__builtin_constant_p(sig)	    \
61 	 ? __const_sigdelset((set), (sig))  \
62 	 : __gen_sigdelset((set), (sig)))
63 
64 
65 static inline void __gen_sigdelset(sigset_t *set, int _sig)
66 {
67 	asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
68 }
69 
70 static inline void __const_sigdelset(sigset_t *set, int _sig)
71 {
72 	unsigned long sig = _sig - 1;
73 	set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
74 }
75 
76 static inline int __const_sigismember(sigset_t *set, int _sig)
77 {
78 	unsigned long sig = _sig - 1;
79 	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
80 }
81 
82 static inline int __gen_sigismember(sigset_t *set, int _sig)
83 {
84 	int ret;
85 	asm("btl %2,%1\n\tsbbl %0,%0"
86 	    : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
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 
95 static inline int sigfindinword(unsigned long word)
96 {
97 	asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
98 	return word;
99 }
100 
101 struct pt_regs;
102 
103 #else /* __i386__ */
104 
105 #undef __HAVE_ARCH_SIG_BITOPS
106 
107 #endif /* !__i386__ */
108 
109 #endif /* __ASSEMBLY__ */
110 #endif /* _ASM_X86_SIGNAL_H */
111