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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 | |