8451d0dd78
patch modifies makesyscalls.sh to prefix all of the non-compatibility calls (e.g. not linux_, freebsd32_) with sys_ and updates the kernel entry points and all places in the code that use them. It also fixes an additional name space collision between the kernel function psignal and the libc function of the same name by renaming the kernel psignal kern_psignal(). By introducing this change now we will ease future MFCs that change syscalls. Reviewed by: rwatson Approved by: re (bz)
368 lines
11 KiB
C
368 lines
11 KiB
C
/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)signalvar.h 8.6 (Berkeley) 2/19/95
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* $FreeBSD$
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*/
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#ifndef _SYS_SIGNALVAR_H_
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#define _SYS_SIGNALVAR_H_
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#include <sys/queue.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#include <sys/signal.h>
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/*
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* Kernel signal definitions and data structures.
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*/
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/*
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* Logical process signal actions and state, needed only within the process
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* The mapping between sigacts and proc structures is 1:1 except for rfork()
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* processes masquerading as threads which use one structure for the whole
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* group. All members are locked by the included mutex. The reference count
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* and mutex must be last for the bcopy in sigacts_copy() to work.
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*/
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struct sigacts {
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sig_t ps_sigact[_SIG_MAXSIG]; /* Disposition of signals. */
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sigset_t ps_catchmask[_SIG_MAXSIG]; /* Signals to be blocked. */
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sigset_t ps_sigonstack; /* Signals to take on sigstack. */
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sigset_t ps_sigintr; /* Signals that interrupt syscalls. */
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sigset_t ps_sigreset; /* Signals that reset when caught. */
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sigset_t ps_signodefer; /* Signals not masked while handled. */
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sigset_t ps_siginfo; /* Signals that want SA_SIGINFO args. */
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sigset_t ps_sigignore; /* Signals being ignored. */
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sigset_t ps_sigcatch; /* Signals being caught by user. */
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sigset_t ps_freebsd4; /* Signals using freebsd4 ucontext. */
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sigset_t ps_osigset; /* Signals using <= 3.x osigset_t. */
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sigset_t ps_usertramp; /* SunOS compat; libc sigtramp. XXX */
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int ps_flag;
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int ps_refcnt;
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struct mtx ps_mtx;
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};
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#define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
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#define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
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#define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */
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#ifdef _KERNEL
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#ifdef COMPAT_43
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typedef struct {
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struct osigcontext si_sc;
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int si_signo;
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int si_code;
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union sigval si_value;
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} osiginfo_t;
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struct osigaction {
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union {
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void (*__sa_handler)(int);
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void (*__sa_sigaction)(int, osiginfo_t *, void *);
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} __sigaction_u; /* signal handler */
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osigset_t sa_mask; /* signal mask to apply */
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int sa_flags; /* see signal options below */
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};
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typedef void __osiginfohandler_t(int, osiginfo_t *, void *);
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#endif /* COMPAT_43 */
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/* additional signal action values, used only temporarily/internally */
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#define SIG_CATCH ((__sighandler_t *)2)
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/* #define SIG_HOLD ((__sighandler_t *)3) See signal.h */
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/*
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* get signal action for process and signal; currently only for current process
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*/
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#define SIGACTION(p, sig) (p->p_sigacts->ps_sigact[_SIG_IDX(sig)])
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#endif /* _KERNEL */
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/*
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* sigset_t manipulation macros.
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*/
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#define SIGADDSET(set, signo) \
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((set).__bits[_SIG_WORD(signo)] |= _SIG_BIT(signo))
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#define SIGDELSET(set, signo) \
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((set).__bits[_SIG_WORD(signo)] &= ~_SIG_BIT(signo))
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#define SIGEMPTYSET(set) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set).__bits[__i] = 0; \
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} while (0)
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#define SIGFILLSET(set) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set).__bits[__i] = ~0U; \
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} while (0)
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#define SIGISMEMBER(set, signo) \
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((set).__bits[_SIG_WORD(signo)] & _SIG_BIT(signo))
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#define SIGISEMPTY(set) (__sigisempty(&(set)))
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#define SIGNOTEMPTY(set) (!__sigisempty(&(set)))
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#define SIGSETEQ(set1, set2) (__sigseteq(&(set1), &(set2)))
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#define SIGSETNEQ(set1, set2) (!__sigseteq(&(set1), &(set2)))
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#define SIGSETOR(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] |= (set2).__bits[__i]; \
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} while (0)
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#define SIGSETAND(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] &= (set2).__bits[__i]; \
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} while (0)
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#define SIGSETNAND(set1, set2) \
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do { \
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int __i; \
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for (__i = 0; __i < _SIG_WORDS; __i++) \
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(set1).__bits[__i] &= ~(set2).__bits[__i]; \
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} while (0)
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#define SIGSETLO(set1, set2) ((set1).__bits[0] = (set2).__bits[0])
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#define SIGSETOLD(set, oset) ((set).__bits[0] = (oset))
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#define SIG_CANTMASK(set) \
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SIGDELSET(set, SIGKILL), SIGDELSET(set, SIGSTOP)
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#define SIG_STOPSIGMASK(set) \
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SIGDELSET(set, SIGSTOP), SIGDELSET(set, SIGTSTP), \
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SIGDELSET(set, SIGTTIN), SIGDELSET(set, SIGTTOU)
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#define SIG_CONTSIGMASK(set) \
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SIGDELSET(set, SIGCONT)
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#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
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#define SIG2OSIG(sig, osig) (osig = (sig).__bits[0])
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#define OSIG2SIG(osig, sig) SIGEMPTYSET(sig); (sig).__bits[0] = osig
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static __inline int
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__sigisempty(sigset_t *set)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++) {
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if (set->__bits[i])
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return (0);
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}
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return (1);
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}
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static __inline int
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__sigseteq(sigset_t *set1, sigset_t *set2)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++) {
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if (set1->__bits[i] != set2->__bits[i])
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return (0);
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}
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return (1);
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}
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struct osigevent {
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int sigev_notify; /* Notification type */
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union {
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int __sigev_signo; /* Signal number */
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int __sigev_notify_kqueue;
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} __sigev_u;
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union sigval sigev_value; /* Signal value */
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};
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typedef struct ksiginfo {
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TAILQ_ENTRY(ksiginfo) ksi_link;
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siginfo_t ksi_info;
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int ksi_flags;
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struct sigqueue *ksi_sigq;
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} ksiginfo_t;
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#define ksi_signo ksi_info.si_signo
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#define ksi_errno ksi_info.si_errno
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#define ksi_code ksi_info.si_code
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#define ksi_pid ksi_info.si_pid
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#define ksi_uid ksi_info.si_uid
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#define ksi_status ksi_info.si_status
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#define ksi_addr ksi_info.si_addr
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#define ksi_value ksi_info.si_value
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#define ksi_band ksi_info.si_band
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#define ksi_trapno ksi_info.si_trapno
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#define ksi_overrun ksi_info.si_overrun
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#define ksi_timerid ksi_info.si_timerid
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#define ksi_mqd ksi_info.si_mqd
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/* bits for ksi_flags */
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#define KSI_TRAP 0x01 /* Generated by trap. */
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#define KSI_EXT 0x02 /* Externally managed ksi. */
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#define KSI_INS 0x04 /* Directly insert ksi, not the copy */
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#define KSI_SIGQ 0x08 /* Generated by sigqueue, might ret EGAIN. */
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#define KSI_HEAD 0x10 /* Insert into head, not tail. */
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#define KSI_COPYMASK (KSI_TRAP|KSI_SIGQ)
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#define KSI_ONQ(ksi) ((ksi)->ksi_sigq != NULL)
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typedef struct sigqueue {
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sigset_t sq_signals; /* All pending signals. */
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sigset_t sq_kill; /* Legacy depth 1 queue. */
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TAILQ_HEAD(, ksiginfo) sq_list;/* Queued signal info. */
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struct proc *sq_proc;
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int sq_flags;
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} sigqueue_t;
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/* Flags for ksi_flags */
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#define SQ_INIT 0x01
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#ifdef _KERNEL
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/* Return nonzero if process p has an unmasked pending signal. */
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#define SIGPENDING(td) \
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((!SIGISEMPTY((td)->td_siglist) && \
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!sigsetmasked(&(td)->td_siglist, &(td)->td_sigmask)) || \
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(!SIGISEMPTY((td)->td_proc->p_siglist) && \
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!sigsetmasked(&(td)->td_proc->p_siglist, &(td)->td_sigmask)))
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/*
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* Return the value of the pseudo-expression ((*set & ~*mask) != 0). This
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* is an optimized version of SIGISEMPTY() on a temporary variable
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* containing SIGSETNAND(*set, *mask).
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*/
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static __inline int
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sigsetmasked(sigset_t *set, sigset_t *mask)
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{
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int i;
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for (i = 0; i < _SIG_WORDS; i++) {
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if (set->__bits[i] & ~mask->__bits[i])
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return (0);
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}
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return (1);
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}
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#define ksiginfo_init(ksi) \
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do { \
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bzero(ksi, sizeof(ksiginfo_t)); \
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} while(0)
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#define ksiginfo_init_trap(ksi) \
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do { \
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ksiginfo_t *kp = ksi; \
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bzero(kp, sizeof(ksiginfo_t)); \
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kp->ksi_flags |= KSI_TRAP; \
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} while(0)
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static __inline void
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ksiginfo_copy(ksiginfo_t *src, ksiginfo_t *dst)
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{
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(dst)->ksi_info = src->ksi_info;
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(dst)->ksi_flags = (src->ksi_flags & KSI_COPYMASK);
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}
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static __inline void
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ksiginfo_set_sigev(ksiginfo_t *dst, struct sigevent *sigev)
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{
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dst->ksi_signo = sigev->sigev_signo;
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dst->ksi_value = sigev->sigev_value;
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}
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struct pgrp;
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struct proc;
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struct sigio;
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struct thread;
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/*
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* Lock the pointers for a sigio object in the underlying objects of
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* a file descriptor.
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*/
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#define SIGIO_LOCK() mtx_lock(&sigio_lock)
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#define SIGIO_TRYLOCK() mtx_trylock(&sigio_lock)
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#define SIGIO_UNLOCK() mtx_unlock(&sigio_lock)
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#define SIGIO_LOCKED() mtx_owned(&sigio_lock)
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#define SIGIO_ASSERT(type) mtx_assert(&sigio_lock, type)
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extern struct mtx sigio_lock;
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/* Values for stop_allowed parameter for cursig(). */
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#define SIG_STOP_ALLOWED 100
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#define SIG_STOP_NOT_ALLOWED 101
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/* Flags for kern_sigprocmask(). */
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#define SIGPROCMASK_OLD 0x0001
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#define SIGPROCMASK_PROC_LOCKED 0x0002
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#define SIGPROCMASK_PS_LOCKED 0x0004
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int cursig(struct thread *td, int stop_allowed);
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void execsigs(struct proc *p);
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void gsignal(int pgid, int sig, ksiginfo_t *ksi);
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void killproc(struct proc *p, char *why);
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ksiginfo_t * ksiginfo_alloc(int wait);
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void ksiginfo_free(ksiginfo_t *ksi);
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int pksignal(struct proc *p, int sig, ksiginfo_t *ksi);
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void pgsigio(struct sigio **sigiop, int sig, int checkctty);
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void pgsignal(struct pgrp *pgrp, int sig, int checkctty, ksiginfo_t *ksi);
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int postsig(int sig);
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void kern_psignal(struct proc *p, int sig);
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int ptracestop(struct thread *td, int sig);
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void sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *retmask);
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struct sigacts *sigacts_alloc(void);
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void sigacts_copy(struct sigacts *dest, struct sigacts *src);
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void sigacts_free(struct sigacts *ps);
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struct sigacts *sigacts_hold(struct sigacts *ps);
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int sigacts_shared(struct sigacts *ps);
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void sigexit(struct thread *td, int sig) __dead2;
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int sigev_findtd(struct proc *p, struct sigevent *sigev, struct thread **);
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int sig_ffs(sigset_t *set);
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void siginit(struct proc *p);
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void signotify(struct thread *td);
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void sigqueue_delete(struct sigqueue *queue, int sig);
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void sigqueue_delete_proc(struct proc *p, int sig);
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void sigqueue_flush(struct sigqueue *queue);
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void sigqueue_init(struct sigqueue *queue, struct proc *p);
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void sigqueue_take(ksiginfo_t *ksi);
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void tdksignal(struct thread *td, int sig, ksiginfo_t *ksi);
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int tdsendsignal(struct proc *p, struct thread *td, int sig,
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ksiginfo_t *ksi);
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void tdsigcleanup(struct thread *td);
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void tdsignal(struct thread *td, int sig);
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void trapsignal(struct thread *td, ksiginfo_t *ksi);
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#endif /* _KERNEL */
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#endif /* !_SYS_SIGNALVAR_H_ */
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