1 | /* |
2 | * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ |
29 | /* |
30 | * Copyright (c) 1991, 1993 |
31 | * The Regents of the University of California. All rights reserved. |
32 | * |
33 | * Redistribution and use in source and binary forms, with or without |
34 | * modification, are permitted provided that the following conditions |
35 | * are met: |
36 | * 1. Redistributions of source code must retain the above copyright |
37 | * notice, this list of conditions and the following disclaimer. |
38 | * 2. Redistributions in binary form must reproduce the above copyright |
39 | * notice, this list of conditions and the following disclaimer in the |
40 | * documentation and/or other materials provided with the distribution. |
41 | * 3. All advertising materials mentioning features or use of this software |
42 | * must display the following acknowledgement: |
43 | * This product includes software developed by the University of |
44 | * California, Berkeley and its contributors. |
45 | * 4. Neither the name of the University nor the names of its contributors |
46 | * may be used to endorse or promote products derived from this software |
47 | * without specific prior written permission. |
48 | * |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
59 | * SUCH DAMAGE. |
60 | * |
61 | * @(#)signalvar.h 8.3 (Berkeley) 1/4/94 |
62 | */ |
63 | |
64 | #ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */ |
65 | #define _SYS_SIGNALVAR_H_ |
66 | |
67 | #include <sys/appleapiopts.h> |
68 | |
69 | #ifdef BSD_KERNEL_PRIVATE |
70 | |
71 | #include <stdatomic.h> |
72 | |
73 | /* |
74 | * Kernel signal definitions and data structures, |
75 | * not exported to user programs. |
76 | */ |
77 | |
78 | /* |
79 | * Process signal actions and state, needed only within the process |
80 | * (not necessarily resident). |
81 | */ |
82 | struct sigacts { |
83 | user_addr_t ps_sigact[NSIG]; /* disposition of signals */ |
84 | user_addr_t ps_trampact[NSIG]; /* disposition of signals */ |
85 | sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ |
86 | sigset_t ps_sigonstack; /* signals to take on sigstack */ |
87 | sigset_t ps_sigintr; /* signals that interrupt syscalls */ |
88 | sigset_t ps_sigreset; /* signals that reset when caught */ |
89 | sigset_t ps_signodefer; /* signals not masked while handled */ |
90 | sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ |
91 | sigset_t ps_oldmask; /* saved mask from before sigpause */ |
92 | user_addr_t ps_sigreturn_token; /* random token used to validate sigreturn arguments */ |
93 | _Atomic uint32_t ps_sigreturn_validation; /* sigreturn argument validation state */ |
94 | int ps_flags; /* signal flags, below */ |
95 | struct kern_sigaltstack ps_sigstk; /* sp, length & flags */ |
96 | int ps_sig; /* for core dump/debugger XXX */ |
97 | int ps_code; /* for core dump/debugger XXX */ |
98 | int ps_addr; /* for core dump/debugger XXX */ |
99 | }; |
100 | |
101 | /* signal flags */ |
102 | #define SAS_OLDMASK 0x01 /* need to restore mask before pause */ |
103 | #define SAS_ALTSTACK 0x02 /* have alternate signal stack */ |
104 | |
105 | /* |
106 | * Additional signal action values, used only temporarily/internally; these |
107 | * values should be non-intersecting with values defined in signal.h, e.g.: |
108 | * SIG_IGN, SIG_DFL, SIG_ERR, SIG_IGN. |
109 | */ |
110 | #define KERN_SIG_CATCH CAST_USER_ADDR_T(2) |
111 | #define KERN_SIG_HOLD CAST_USER_ADDR_T(3) |
112 | #define KERN_SIG_WAIT CAST_USER_ADDR_T(4) |
113 | |
114 | /* Values for ps_sigreturn_validation */ |
115 | #define PS_SIGRETURN_VALIDATION_DEFAULT 0x0u |
116 | #define PS_SIGRETURN_VALIDATION_ENABLED 0x1u |
117 | #define PS_SIGRETURN_VALIDATION_DISABLED 0x2u |
118 | |
119 | /* |
120 | * get signal action for process and signal; currently only for current process |
121 | */ |
122 | #define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[(sig)]) |
123 | |
124 | /* |
125 | * Check for per-process and per thread signals. |
126 | */ |
127 | #define SHOULDissignal(p,uthreadp) \ |
128 | (((uthreadp)->uu_siglist) \ |
129 | & ~((((uthreadp)->uu_sigmask) \ |
130 | | (((p)->p_lflag & P_LTRACED) ? 0 : (p)->p_sigignore)) \ |
131 | & ~sigcantmask)) |
132 | |
133 | /* |
134 | * Check for signals and per-thread signals. |
135 | * Use in trap() and syscall() before |
136 | * exiting kernel. |
137 | */ |
138 | #define CHECK_SIGNALS(p, thread, uthreadp) \ |
139 | (!thread_should_halt(thread) \ |
140 | && (SHOULDissignal(p,uthreadp))) |
141 | |
142 | /* |
143 | * Signal properties and actions. |
144 | * The array below categorizes the signals and their default actions |
145 | * according to the following properties: |
146 | */ |
147 | #define SA_KILL 0x01 /* terminates process by default */ |
148 | #define SA_CORE 0x02 /* ditto and coredumps */ |
149 | #define SA_STOP 0x04 /* suspend process */ |
150 | #define SA_TTYSTOP 0x08 /* ditto, from tty */ |
151 | #define SA_IGNORE 0x10 /* ignore by default */ |
152 | #define SA_CONT 0x20 /* continue if suspended */ |
153 | #define SA_CANTMASK 0x40 /* non-maskable, catchable */ |
154 | |
155 | #ifdef SIGPROP |
156 | int sigprop[NSIG] = { |
157 | 0, /* unused */ |
158 | SA_KILL, /* SIGHUP */ |
159 | SA_KILL, /* SIGINT */ |
160 | SA_KILL|SA_CORE, /* SIGQUIT */ |
161 | SA_KILL|SA_CORE, /* SIGILL */ |
162 | SA_KILL|SA_CORE, /* SIGTRAP */ |
163 | SA_KILL|SA_CORE, /* SIGABRT */ |
164 | SA_KILL|SA_CORE, /* SIGEMT */ |
165 | SA_KILL|SA_CORE, /* SIGFPE */ |
166 | SA_KILL, /* SIGKILL */ |
167 | SA_KILL|SA_CORE, /* SIGBUS */ |
168 | SA_KILL|SA_CORE, /* SIGSEGV */ |
169 | SA_KILL|SA_CORE, /* SIGSYS */ |
170 | SA_KILL, /* SIGPIPE */ |
171 | SA_KILL, /* SIGALRM */ |
172 | SA_KILL, /* SIGTERM */ |
173 | SA_IGNORE, /* SIGURG */ |
174 | SA_STOP, /* SIGSTOP */ |
175 | SA_STOP|SA_TTYSTOP, /* SIGTSTP */ |
176 | SA_IGNORE|SA_CONT, /* SIGCONT */ |
177 | SA_IGNORE, /* SIGCHLD */ |
178 | SA_STOP|SA_TTYSTOP, /* SIGTTIN */ |
179 | SA_STOP|SA_TTYSTOP, /* SIGTTOU */ |
180 | SA_IGNORE, /* SIGIO */ |
181 | SA_KILL, /* SIGXCPU */ |
182 | SA_KILL, /* SIGXFSZ */ |
183 | SA_KILL, /* SIGVTALRM */ |
184 | SA_KILL, /* SIGPROF */ |
185 | SA_IGNORE, /* SIGWINCH */ |
186 | SA_IGNORE, /* SIGINFO */ |
187 | SA_KILL, /* SIGUSR1 */ |
188 | SA_KILL, /* SIGUSR2 */ |
189 | }; |
190 | |
191 | #define contsigmask (sigmask(SIGCONT)) |
192 | #define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \ |
193 | sigmask(SIGTTIN) | sigmask(SIGTTOU)) |
194 | |
195 | #endif /* SIGPROP */ |
196 | |
197 | #define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP)) |
198 | |
199 | #define SIGRESTRICTMASK (sigmask(SIGILL) | sigmask(SIGTRAP) | sigmask(SIGABRT) | \ |
200 | sigmask(SIGFPE) | sigmask(SIGBUS) | sigmask(SIGSEGV) | \ |
201 | sigmask(SIGSYS)) |
202 | |
203 | extern unsigned sigrestrict_arg; |
204 | |
205 | /* |
206 | * Machine-independent functions: |
207 | */ |
208 | |
209 | void execsigs(struct proc *p, thread_t thread); |
210 | void gsignal(int pgid, int sig); |
211 | int issignal_locked(struct proc *p); |
212 | int CURSIG(struct proc *p); |
213 | int clear_procsiglist(struct proc *p, int bit, int in_signalstart); |
214 | int set_procsigmask(struct proc *p, int bit); |
215 | void postsig_locked(int sig); |
216 | void siginit(struct proc *p); |
217 | void trapsignal(struct proc *p, int sig, unsigned code); |
218 | void pt_setrunnable(struct proc *p); |
219 | int hassigprop(int sig, int prop); |
220 | int setsigvec(proc_t, thread_t, int signum, struct __kern_sigaction *, boolean_t in_sigstart); |
221 | |
222 | struct os_reason; |
223 | /* |
224 | * Machine-dependent functions: |
225 | */ |
226 | void sendsig(struct proc *, /*sig_t*/ user_addr_t action, int sig, |
227 | int returnmask, uint32_t code); |
228 | |
229 | void psignal(struct proc *p, int sig); |
230 | void psignal_with_reason(struct proc *p, int sig, struct os_reason *signal_reason); |
231 | void psignal_locked(struct proc *, int); |
232 | void psignal_try_thread(proc_t, thread_t, int signum); |
233 | void psignal_try_thread_with_reason(proc_t, thread_t, int, struct os_reason*); |
234 | void psignal_thread_with_reason(proc_t, thread_t, int, struct os_reason*); |
235 | void psignal_uthread(thread_t, int); |
236 | void pgsignal(struct pgrp *pgrp, int sig, int checkctty); |
237 | void tty_pgsignal(struct tty * tp, int sig, int checkctty); |
238 | void threadsignal(thread_t sig_actthread, int signum, |
239 | mach_exception_code_t code, boolean_t set_exitreason); |
240 | int thread_issignal(proc_t p, thread_t th, sigset_t mask); |
241 | void psignal_vfork(struct proc *p, task_t new_task, thread_t thread, |
242 | int signum); |
243 | void psignal_vfork_with_reason(proc_t p, task_t new_task, thread_t thread, |
244 | int signum, struct os_reason *signal_reason); |
245 | void signal_setast(thread_t sig_actthread); |
246 | void pgsigio(pid_t pgid, int signalnum); |
247 | |
248 | void sig_lock_to_exit(struct proc *p); |
249 | int sig_try_locked(struct proc *p); |
250 | |
251 | #endif /* BSD_KERNEL_PRIVATE */ |
252 | |
253 | |
254 | #ifdef XNU_KERNEL_PRIVATE |
255 | |
256 | /* Functions exported to Mach as well */ |
257 | |
258 | #define COREDUMP_IGNORE_ULIMIT 0x0001 /* Ignore the process's core file ulimit. */ |
259 | #define COREDUMP_FULLFSYNC 0x0002 /* Run F_FULLFSYNC on the core file's vnode */ |
260 | |
261 | int coredump(struct proc *p, uint32_t reserve_mb, int coredump_flags); |
262 | void set_thread_exit_reason(void *th, void *reason, boolean_t proc_locked); |
263 | |
264 | #endif /* XNU_KERNEL_PRIVATE */ |
265 | |
266 | |
267 | #endif /* !_SYS_SIGNALVAR_H_ */ |
268 | |