gems-kernel/source/THIRDPARTY/xnu/bsd/sys/signalvar.h
2024-06-03 11:29:39 -05:00

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C

/*
* Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)signalvar.h 8.3 (Berkeley) 1/4/94
*/
#ifndef _SYS_SIGNALVAR_H_ /* tmp for user.h */
#define _SYS_SIGNALVAR_H_
#include <sys/appleapiopts.h>
#ifdef BSD_KERNEL_PRIVATE
#include <stdatomic.h>
/* signal flags */
#define SAS_OLDMASK 0x01 /* need to restore mask before pause */
#define SAS_ALTSTACK 0x02 /* have alternate signal stack */
/*
* Additional signal action values, used only temporarily/internally; these
* values should be non-intersecting with values defined in signal.h, e.g.:
* SIG_IGN, SIG_DFL, SIG_ERR, SIG_IGN.
*/
#define KERN_SIG_CATCH CAST_USER_ADDR_T(2)
#define KERN_SIG_HOLD CAST_USER_ADDR_T(3)
#define KERN_SIG_WAIT CAST_USER_ADDR_T(4)
/* Values for ps_sigreturn_validation */
#define PS_SIGRETURN_VALIDATION_DEFAULT 0x0u
#define PS_SIGRETURN_VALIDATION_ENABLED 0x1u
#define PS_SIGRETURN_VALIDATION_DISABLED 0x2u
/*
* get signal action for process and signal; currently only for current process
*/
#define SIGACTION(p, sig) ({ p->p_sigacts.ps_sigact[(sig)]; })
#define SIGTRAMP(p, sig) ({ p->p_sigacts.ps_trampact[(sig)]; })
/*
* Check for per-process and per thread signals.
*/
#define SHOULDissignal(p, uthreadp) \
(((uthreadp)->uu_siglist) \
& ~((((uthreadp)->uu_sigmask) \
| (((p)->p_lflag & P_LTRACED) ? 0 : (p)->p_sigignore)) \
& ~sigcantmask))
/*
* Check for signals and per-thread signals.
* Use in trap() and syscall() before
* exiting kernel.
*/
#define CHECK_SIGNALS(p, thread, uthreadp) \
(!thread_should_halt(thread) \
&& (SHOULDissignal(p,uthreadp)))
/*
* Signal properties and actions.
* The array below categorizes the signals and their default actions
* according to the following properties:
*/
#define SA_KILL 0x01 /* terminates process by default */
#define SA_CORE 0x02 /* ditto and coredumps */
#define SA_STOP 0x04 /* suspend process */
#define SA_TTYSTOP 0x08 /* ditto, from tty */
#define SA_IGNORE 0x10 /* ignore by default */
#define SA_CONT 0x20 /* continue if suspended */
#define SA_CANTMASK 0x40 /* non-maskable, catchable */
#ifdef SIGPROP
int sigprop[NSIG] = {
0, /* unused */
SA_KILL, /* SIGHUP */
SA_KILL, /* SIGINT */
SA_KILL | SA_CORE, /* SIGQUIT */
SA_KILL | SA_CORE, /* SIGILL */
SA_KILL | SA_CORE, /* SIGTRAP */
SA_KILL | SA_CORE, /* SIGABRT */
SA_KILL | SA_CORE, /* SIGEMT */
SA_KILL | SA_CORE, /* SIGFPE */
SA_KILL, /* SIGKILL */
SA_KILL | SA_CORE, /* SIGBUS */
SA_KILL | SA_CORE, /* SIGSEGV */
SA_KILL | SA_CORE, /* SIGSYS */
SA_KILL, /* SIGPIPE */
SA_KILL, /* SIGALRM */
SA_KILL, /* SIGTERM */
SA_IGNORE, /* SIGURG */
SA_STOP, /* SIGSTOP */
SA_STOP | SA_TTYSTOP, /* SIGTSTP */
SA_IGNORE | SA_CONT, /* SIGCONT */
SA_IGNORE, /* SIGCHLD */
SA_STOP | SA_TTYSTOP, /* SIGTTIN */
SA_STOP | SA_TTYSTOP, /* SIGTTOU */
SA_IGNORE, /* SIGIO */
SA_KILL, /* SIGXCPU */
SA_KILL, /* SIGXFSZ */
SA_KILL, /* SIGVTALRM */
SA_KILL, /* SIGPROF */
SA_IGNORE, /* SIGWINCH */
SA_IGNORE, /* SIGINFO */
SA_KILL, /* SIGUSR1 */
SA_KILL, /* SIGUSR2 */
};
#define contsigmask (sigmask(SIGCONT))
#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
sigmask(SIGTTIN) | sigmask(SIGTTOU))
#endif /* SIGPROP */
#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
#define SIGRESTRICTMASK (sigmask(SIGILL) | sigmask(SIGTRAP) | sigmask(SIGABRT) | \
sigmask(SIGFPE) | sigmask(SIGBUS) | sigmask(SIGSEGV) | \
sigmask(SIGSYS))
/*
* Machine-independent functions:
*/
#if DEVELOPMENT || DEBUG
extern bool no_sigsys;
#define send_sigsys (!no_sigsys)
#else
#define send_sigsys 1
#endif
void execsigs(struct proc *p, thread_t thread);
void gsignal(int pgid, int sig);
int issignal_locked(struct proc *p);
int CURSIG(struct proc *p);
int clear_procsiglist(struct proc *p, int bit, int in_signalstart);
int set_procsigmask(struct proc *p, int bit);
void postsig_locked(int sig);
void siginit(struct proc *p);
void trapsignal(struct proc *p, int sig, unsigned code);
void pt_setrunnable(struct proc *p);
int hassigprop(int sig, int prop);
int setsigvec(proc_t, thread_t, int signum, struct __kern_sigaction *, boolean_t in_sigstart);
struct os_reason;
/*
* Machine-dependent functions:
*/
void sendsig(struct proc *, /*sig_t*/ user_addr_t action, int sig,
int returnmask, uint32_t code, sigset_t siginfo);
void psignal(struct proc *p, int sig);
void psignal_with_reason(struct proc *p, int sig, struct os_reason *signal_reason);
void psignal_locked(struct proc *, int);
void psignal_try_thread(proc_t, thread_t, int signum);
void psignal_try_thread_with_reason(proc_t, thread_t, int, struct os_reason*);
void psignal_thread_with_reason(proc_t, thread_t, int, struct os_reason*);
void psignal_uthread(thread_t, int);
void pgsignal(struct pgrp *pgrp, int sig, int checkctty);
void tty_pgsignal_locked(struct tty * tp, int sig, int checkctty);
void threadsignal(thread_t sig_actthread, int signum,
mach_exception_code_t code, boolean_t set_exitreason);
int thread_issignal(proc_t p, thread_t th, sigset_t mask);
void psignal_vfork(struct proc *p, task_t new_task, thread_t thread,
int signum);
void psignal_vfork_with_reason(proc_t p, task_t new_task, thread_t thread,
int signum, struct os_reason *signal_reason);
void signal_setast(thread_t sig_actthread);
void pgsigio(pid_t pgid, int signalnum);
void sig_lock_to_exit(struct proc *p);
int sig_try_locked(struct proc *p);
#endif /* BSD_KERNEL_PRIVATE */
#if defined(KERNEL_PRIVATE)
/* Forward-declare these for consumers of the SDK that don't know about BSD types */
struct proc;
struct os_reason;
void psignal_sigkill_with_reason(struct proc *p, struct os_reason *signal_reason);
#endif /* defined(KERNEL_PRIVATE) */
#ifdef XNU_KERNEL_PRIVATE
/* Functions exported to Mach as well */
#define COREDUMP_IGNORE_ULIMIT 0x0001 /* Ignore the process's core file ulimit. */
#define COREDUMP_FULLFSYNC 0x0002 /* Run F_FULLFSYNC on the core file's vnode */
cpu_type_t process_cpu_type(struct proc * core_proc);
cpu_type_t process_cpu_subtype(struct proc * core_proc);
int coredump(struct proc *p, uint32_t reserve_mb, int coredump_flags);
void set_thread_exit_reason(void *th, void *reason, boolean_t proc_locked);
#endif /* XNU_KERNEL_PRIVATE */
#endif /* !_SYS_SIGNALVAR_H_ */