1 /*- 2 * Copyright (c) 1982, 1988, 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD$ 34 */ 35 36 #ifndef _SYS_SYSENT_H_ 37 #define _SYS_SYSENT_H_ 38 39 #include <sys/signal.h> 40 41 struct proc; 42 43 typedef int sy_call_t __P((struct proc *, void *)); 44 45 struct sysent { /* system call table */ 46 int sy_narg; /* number of arguments */ 47 sy_call_t *sy_call; /* implementing function */ 48 }; 49 #define SCARG(p,k) ((p)->k) /* get arg from args pointer */ 50 /* placeholder till we integrate rest of lite2 syscallargs changes XXX */ 51 52 struct image_params; 53 struct trapframe; 54 struct vnode; 55 56 struct sysentvec { 57 int sv_size; /* number of entries */ 58 struct sysent *sv_table; /* pointer to sysent */ 59 u_int sv_mask; /* optional mask to index */ 60 int sv_sigsize; /* size of signal translation table */ 61 int *sv_sigtbl; /* signal translation table */ 62 int sv_errsize; /* size of errno translation table */ 63 int *sv_errtbl; /* errno translation table */ 64 int (*sv_transtrap) __P((int, int)); 65 /* translate trap-to-signal mapping */ 66 int (*sv_fixup) __P((long **, struct image_params *)); 67 /* stack fixup function */ 68 void (*sv_sendsig) __P((void (*)(int), int, sigset_t *, u_long)); 69 /* send signal */ 70 char *sv_sigcode; /* start of sigtramp code */ 71 int *sv_szsigcode; /* size of sigtramp code */ 72 void (*sv_prepsyscall) __P((struct trapframe *, int *, 73 u_int *, caddr_t *)); 74 char *sv_name; /* name of binary type */ 75 int (*sv_coredump) __P((struct proc *p, struct vnode *, off_t)); 76 /* function to dump core, or NULL */ 77 }; 78 79 #ifdef KERNEL 80 extern struct sysentvec aout_sysvec; 81 extern struct sysent sysent[]; 82 83 #define NO_SYSCALL (-1) 84 85 struct module; 86 87 struct syscall_module_data { 88 int (*chainevh)(struct module *, int, void *); /* next handler */ 89 void *chainarg; /* arg for next event handler */ 90 int *offset; /* offset into sysent */ 91 struct sysent *new_sysent; /* new sysent */ 92 struct sysent old_sysent; /* old sysent */ 93 }; 94 95 #define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \ 96 static struct syscall_module_data name##_syscall_mod = { \ 97 evh, arg, offset, new_sysent \ 98 }; \ 99 \ 100 static moduledata_t name##_mod = { \ 101 #name, \ 102 syscall_module_handler, \ 103 &name##_syscall_mod \ 104 }; \ 105 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE) 106 107 int syscall_register __P((int *offset, struct sysent *new_sysent, 108 struct sysent *old_sysent)); 109 int syscall_deregister __P((int *offset, struct sysent *old_sysent)); 110 int syscall_module_handler __P((struct module *mod, int what, void *arg)); 111 112 #endif /* KERNEL */ 113 114 #endif /* !_SYS_SYSENT_H_ */ 115