mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
2c42a14602
----------------------------- The core of the signalling code has been rewritten to operate on the new sigset_t. No methodological changes have been made. Most references to a sigset_t object are through macros (see signalvar.h) to create a level of abstraction and to provide a basis for further improvements. The NSIG constant has not been changed to reflect the maximum number of signals possible. The reason is that it breaks programs (especially shells) which assume that all signals have a non-null name in sys_signame. See src/bin/sh/trap.c for an example. Instead _SIG_MAXSIG has been introduced to hold the maximum signal possible with the new sigset_t. struct sigprop has been moved from signalvar.h to kern_sig.c because a) it is only used there, and b) access must be done though function sigprop(). The latter because the table doesn't holds properties for all signals, but only for the first NSIG signals. signal.h has been reorganized to make reading easier and to add the new and/or modified structures. The "old" structures are moved to signalvar.h to prevent namespace polution. Especially the coda filesystem suffers from the change, because it contained lines like (p->p_sigmask == SIGIO), which is easy to do for integral types, but not for compound types. NOTE: kdump (and port linux_kdump) must be recompiled. Thanks to Garrett Wollman and Daniel Eischen for pressing the importance of changing sigreturn as well.
115 lines
4.7 KiB
C
115 lines
4.7 KiB
C
/*-
|
|
* Copyright (c) 1982, 1988, 1991 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_SYSENT_H_
|
|
#define _SYS_SYSENT_H_
|
|
|
|
#include <sys/signal.h>
|
|
|
|
struct proc;
|
|
|
|
typedef int sy_call_t __P((struct proc *, void *));
|
|
|
|
struct sysent { /* system call table */
|
|
int sy_narg; /* number of arguments */
|
|
sy_call_t *sy_call; /* implementing function */
|
|
};
|
|
#define SCARG(p,k) ((p)->k) /* get arg from args pointer */
|
|
/* placeholder till we integrate rest of lite2 syscallargs changes XXX */
|
|
|
|
struct image_params;
|
|
struct trapframe;
|
|
struct vnode;
|
|
|
|
struct sysentvec {
|
|
int sv_size; /* number of entries */
|
|
struct sysent *sv_table; /* pointer to sysent */
|
|
u_int sv_mask; /* optional mask to index */
|
|
int sv_sigsize; /* size of signal translation table */
|
|
int *sv_sigtbl; /* signal translation table */
|
|
int sv_errsize; /* size of errno translation table */
|
|
int *sv_errtbl; /* errno translation table */
|
|
int (*sv_transtrap) __P((int, int));
|
|
/* translate trap-to-signal mapping */
|
|
int (*sv_fixup) __P((long **, struct image_params *));
|
|
/* stack fixup function */
|
|
void (*sv_sendsig) __P((void (*)(int), int, sigset_t *, u_long));
|
|
/* send signal */
|
|
char *sv_sigcode; /* start of sigtramp code */
|
|
int *sv_szsigcode; /* size of sigtramp code */
|
|
void (*sv_prepsyscall) __P((struct trapframe *, int *,
|
|
u_int *, caddr_t *));
|
|
char *sv_name; /* name of binary type */
|
|
int (*sv_coredump) __P((struct proc *p, struct vnode *, off_t));
|
|
/* function to dump core, or NULL */
|
|
};
|
|
|
|
#ifdef KERNEL
|
|
extern struct sysentvec aout_sysvec;
|
|
extern struct sysent sysent[];
|
|
|
|
#define NO_SYSCALL (-1)
|
|
|
|
struct module;
|
|
|
|
struct syscall_module_data {
|
|
int (*chainevh)(struct module *, int, void *); /* next handler */
|
|
void *chainarg; /* arg for next event handler */
|
|
int *offset; /* offset into sysent */
|
|
struct sysent *new_sysent; /* new sysent */
|
|
struct sysent old_sysent; /* old sysent */
|
|
};
|
|
|
|
#define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \
|
|
static struct syscall_module_data name##_syscall_mod = { \
|
|
evh, arg, offset, new_sysent \
|
|
}; \
|
|
\
|
|
static moduledata_t name##_mod = { \
|
|
#name, \
|
|
syscall_module_handler, \
|
|
&name##_syscall_mod \
|
|
}; \
|
|
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
|
|
|
|
int syscall_register __P((int *offset, struct sysent *new_sysent,
|
|
struct sysent *old_sysent));
|
|
int syscall_deregister __P((int *offset, struct sysent *old_sysent));
|
|
int syscall_module_handler __P((struct module *mod, int what, void *arg));
|
|
|
|
#endif /* KERNEL */
|
|
|
|
#endif /* !_SYS_SYSENT_H_ */
|