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
21 typedef unsigned long old_sigset_t; /* at least 32 bits */
22
23 typedef 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
__gen_sigaddset(sigset_t * set,int _sig)49 static inline void __gen_sigaddset(sigset_t *set, int _sig)
50 {
51 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
52 }
53
__const_sigaddset(sigset_t * set,int _sig)54 static 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
__gen_sigdelset(sigset_t * set,int _sig)66 static inline void __gen_sigdelset(sigset_t *set, int _sig)
67 {
68 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
69 }
70
__const_sigdelset(sigset_t * set,int _sig)71 static 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
__const_sigismember(sigset_t * set,int _sig)77 static 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
__gen_sigismember(sigset_t * set,int _sig)83 static 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
96 struct 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