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 #ifndef CONFIG_COMPAT
32 typedef 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
__gen_sigaddset(sigset_t * set,int _sig)53 static inline void __gen_sigaddset(sigset_t *set, int _sig)
54 {
55 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
56 }
57
__const_sigaddset(sigset_t * set,int _sig)58 static 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
__gen_sigdelset(sigset_t * set,int _sig)70 static inline void __gen_sigdelset(sigset_t *set, int _sig)
71 {
72 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
73 }
74
__const_sigdelset(sigset_t * set,int _sig)75 static 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
__const_sigismember(sigset_t * set,int _sig)81 static 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
__gen_sigismember(sigset_t * set,int _sig)87 static 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
100 struct 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