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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#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
49static inline void __gen_sigaddset(sigset_t *set, int _sig)
50{
51 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
52}
53
54static 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
66static inline void __gen_sigdelset(sigset_t *set, int _sig)
67{
68 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
69}
70
71static 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
77static 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
83static 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
96struct 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 */
1#ifndef _ASM_X86_SIGNAL_H
2#define _ASM_X86_SIGNAL_H
3
4#ifndef __ASSEMBLY__
5#include <linux/types.h>
6#include <linux/time.h>
7#include <linux/compiler.h>
8
9/* Avoid too many header ordering problems. */
10struct siginfo;
11
12#ifdef __KERNEL__
13#include <linux/linkage.h>
14
15/* Most things should be clean enough to redefine this at will, if care
16 is taken to make libc match. */
17
18#define _NSIG 64
19
20#ifdef __i386__
21# define _NSIG_BPW 32
22#else
23# define _NSIG_BPW 64
24#endif
25
26#define _NSIG_WORDS (_NSIG / _NSIG_BPW)
27
28typedef unsigned long old_sigset_t; /* at least 32 bits */
29
30typedef struct {
31 unsigned long sig[_NSIG_WORDS];
32} sigset_t;
33
34#else
35/* Here we must cater to libcs that poke about in kernel headers. */
36
37#define NSIG 32
38typedef unsigned long sigset_t;
39
40#endif /* __KERNEL__ */
41#endif /* __ASSEMBLY__ */
42
43#define SIGHUP 1
44#define SIGINT 2
45#define SIGQUIT 3
46#define SIGILL 4
47#define SIGTRAP 5
48#define SIGABRT 6
49#define SIGIOT 6
50#define SIGBUS 7
51#define SIGFPE 8
52#define SIGKILL 9
53#define SIGUSR1 10
54#define SIGSEGV 11
55#define SIGUSR2 12
56#define SIGPIPE 13
57#define SIGALRM 14
58#define SIGTERM 15
59#define SIGSTKFLT 16
60#define SIGCHLD 17
61#define SIGCONT 18
62#define SIGSTOP 19
63#define SIGTSTP 20
64#define SIGTTIN 21
65#define SIGTTOU 22
66#define SIGURG 23
67#define SIGXCPU 24
68#define SIGXFSZ 25
69#define SIGVTALRM 26
70#define SIGPROF 27
71#define SIGWINCH 28
72#define SIGIO 29
73#define SIGPOLL SIGIO
74/*
75#define SIGLOST 29
76*/
77#define SIGPWR 30
78#define SIGSYS 31
79#define SIGUNUSED 31
80
81/* These should not be considered constants from userland. */
82#define SIGRTMIN 32
83#define SIGRTMAX _NSIG
84
85/*
86 * SA_FLAGS values:
87 *
88 * SA_ONSTACK indicates that a registered stack_t will be used.
89 * SA_RESTART flag to get restarting signals (which were the default long ago)
90 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.
91 * SA_RESETHAND clears the handler when the signal is delivered.
92 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.
93 * SA_NODEFER prevents the current signal from being masked in the handler.
94 *
95 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single
96 * Unix names RESETHAND and NODEFER respectively.
97 */
98#define SA_NOCLDSTOP 0x00000001u
99#define SA_NOCLDWAIT 0x00000002u
100#define SA_SIGINFO 0x00000004u
101#define SA_ONSTACK 0x08000000u
102#define SA_RESTART 0x10000000u
103#define SA_NODEFER 0x40000000u
104#define SA_RESETHAND 0x80000000u
105
106#define SA_NOMASK SA_NODEFER
107#define SA_ONESHOT SA_RESETHAND
108
109#define SA_RESTORER 0x04000000
110
111/*
112 * sigaltstack controls
113 */
114#define SS_ONSTACK 1
115#define SS_DISABLE 2
116
117#define MINSIGSTKSZ 2048
118#define SIGSTKSZ 8192
119
120#include <asm-generic/signal-defs.h>
121
122#ifndef __ASSEMBLY__
123
124# ifdef __KERNEL__
125extern void do_notify_resume(struct pt_regs *, void *, __u32);
126# endif /* __KERNEL__ */
127
128#ifdef __i386__
129# ifdef __KERNEL__
130struct old_sigaction {
131 __sighandler_t sa_handler;
132 old_sigset_t sa_mask;
133 unsigned long sa_flags;
134 __sigrestore_t sa_restorer;
135};
136
137struct sigaction {
138 __sighandler_t sa_handler;
139 unsigned long sa_flags;
140 __sigrestore_t sa_restorer;
141 sigset_t sa_mask; /* mask last for extensibility */
142};
143
144struct k_sigaction {
145 struct sigaction sa;
146};
147
148# else /* __KERNEL__ */
149/* Here we must cater to libcs that poke about in kernel headers. */
150
151struct sigaction {
152 union {
153 __sighandler_t _sa_handler;
154 void (*_sa_sigaction)(int, struct siginfo *, void *);
155 } _u;
156 sigset_t sa_mask;
157 unsigned long sa_flags;
158 void (*sa_restorer)(void);
159};
160
161#define sa_handler _u._sa_handler
162#define sa_sigaction _u._sa_sigaction
163
164# endif /* ! __KERNEL__ */
165#else /* __i386__ */
166
167struct sigaction {
168 __sighandler_t sa_handler;
169 unsigned long sa_flags;
170 __sigrestore_t sa_restorer;
171 sigset_t sa_mask; /* mask last for extensibility */
172};
173
174struct k_sigaction {
175 struct sigaction sa;
176};
177
178#endif /* !__i386__ */
179
180typedef struct sigaltstack {
181 void __user *ss_sp;
182 int ss_flags;
183 size_t ss_size;
184} stack_t;
185
186#ifdef __KERNEL__
187#include <asm/sigcontext.h>
188
189#ifdef __i386__
190
191#define __HAVE_ARCH_SIG_BITOPS
192
193#define sigaddset(set,sig) \
194 (__builtin_constant_p(sig) \
195 ? __const_sigaddset((set), (sig)) \
196 : __gen_sigaddset((set), (sig)))
197
198static inline void __gen_sigaddset(sigset_t *set, int _sig)
199{
200 asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
201}
202
203static inline void __const_sigaddset(sigset_t *set, int _sig)
204{
205 unsigned long sig = _sig - 1;
206 set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
207}
208
209#define sigdelset(set, sig) \
210 (__builtin_constant_p(sig) \
211 ? __const_sigdelset((set), (sig)) \
212 : __gen_sigdelset((set), (sig)))
213
214
215static inline void __gen_sigdelset(sigset_t *set, int _sig)
216{
217 asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
218}
219
220static inline void __const_sigdelset(sigset_t *set, int _sig)
221{
222 unsigned long sig = _sig - 1;
223 set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
224}
225
226static inline int __const_sigismember(sigset_t *set, int _sig)
227{
228 unsigned long sig = _sig - 1;
229 return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
230}
231
232static inline int __gen_sigismember(sigset_t *set, int _sig)
233{
234 int ret;
235 asm("btl %2,%1\n\tsbbl %0,%0"
236 : "=r"(ret) : "m"(*set), "Ir"(_sig-1) : "cc");
237 return ret;
238}
239
240#define sigismember(set, sig) \
241 (__builtin_constant_p(sig) \
242 ? __const_sigismember((set), (sig)) \
243 : __gen_sigismember((set), (sig)))
244
245static inline int sigfindinword(unsigned long word)
246{
247 asm("bsfl %1,%0" : "=r"(word) : "rm"(word) : "cc");
248 return word;
249}
250
251struct pt_regs;
252
253#else /* __i386__ */
254
255#undef __HAVE_ARCH_SIG_BITOPS
256
257#endif /* !__i386__ */
258
259#define ptrace_signal_deliver(regs, cookie) do { } while (0)
260
261#endif /* __KERNEL__ */
262#endif /* __ASSEMBLY__ */
263
264#endif /* _ASM_X86_SIGNAL_H */