ibcs2_sysvec.c revision 69947 
1/*
2 * Copyright (c) 1995 Steven Wallace
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 Steven Wallace.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * $FreeBSD: head/sys/i386/ibcs2/ibcs2_sysvec.c 69947 2000-12-13 00:17:05Z jake $
31 */
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/lock.h>
36#include <sys/module.h>
37#include <sys/sysent.h>
38#include <sys/signalvar.h>
39#include <sys/proc.h>
40
41#include <i386/ibcs2/ibcs2_syscall.h>
42#include <i386/ibcs2/ibcs2_signal.h>
43
44MODULE_VERSION(ibcs2, 1);
45
46extern int bsd_to_ibcs2_errno[];
47extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
48extern int szsigcode;
49extern char sigcode[];
50
51struct sysentvec ibcs2_svr3_sysvec = {
52        sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
53        ibcs2_sysent,
54        0xFF,
55        IBCS2_SIGTBLSZ,
56        bsd_to_ibcs2_sig,
57        ELAST + 1,
58        bsd_to_ibcs2_errno,
59	0,              /* trap-to-signal translation function */
60	0,		/* fixup */
61	sendsig,
62	sigcode,	/* use generic trampoline */
63	&szsigcode,	/* use generic trampoline size */
64	0,		/* prepsyscall */
65	"IBCS2 COFF",
66	NULL,		/* we don't have a COFF coredump function */
67	NULL,
68	IBCS2_MINSIGSTKSZ
69};
70
71/*
72 * Create an "ibcs2" module that does nothing but allow checking for
73 * the presence of the subsystem.
74 */
75static int
76ibcs2_modevent(module_t mod, int type, void *unused)
77{
78	struct proc *p = NULL;
79	int rval = 0;
80
81	switch(type) {
82	case MOD_UNLOAD:
83		/* if this was an ELF module we'd use elf_brand_inuse()... */
84		ALLPROC_LOCK(AP_SHARED);
85		for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
86			if (p->p_sysent == &ibcs2_svr3_sysvec) {
87				rval = EBUSY;
88				break;
89			}
90		}
91		ALLPROC_LOCK(AP_RELEASE);
92	default:
93	        /* do not care */
94	}
95	return (rval);
96}
97static moduledata_t ibcs2_mod = {
98	"ibcs2",
99	ibcs2_modevent,
100	0
101};
102DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
103