ibcs2_sysvec.c revision 74940 
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 74940 2001-03-28 15:04:22Z jhb $
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#include <sys/sx.h>
41
42#include <i386/ibcs2/ibcs2_syscall.h>
43#include <i386/ibcs2/ibcs2_signal.h>
44
45MODULE_VERSION(ibcs2, 1);
46
47extern int bsd_to_ibcs2_errno[];
48extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
49extern int szsigcode;
50extern char sigcode[];
51
52struct sysentvec ibcs2_svr3_sysvec = {
53        sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
54        ibcs2_sysent,
55        0xFF,
56        IBCS2_SIGTBLSZ,
57        bsd_to_ibcs2_sig,
58        ELAST + 1,
59        bsd_to_ibcs2_errno,
60	0,              /* trap-to-signal translation function */
61	0,		/* fixup */
62	sendsig,
63	sigcode,	/* use generic trampoline */
64	&szsigcode,	/* use generic trampoline size */
65	0,		/* prepsyscall */
66	"IBCS2 COFF",
67	NULL,		/* we don't have a COFF coredump function */
68	NULL,
69	IBCS2_MINSIGSTKSZ
70};
71
72/*
73 * Create an "ibcs2" module that does nothing but allow checking for
74 * the presence of the subsystem.
75 */
76static int
77ibcs2_modevent(module_t mod, int type, void *unused)
78{
79	struct proc *p = NULL;
80	int rval = 0;
81
82	switch(type) {
83	case MOD_UNLOAD:
84		/* if this was an ELF module we'd use elf_brand_inuse()... */
85		sx_slock(&allproc_lock);
86		LIST_FOREACH(p, &allproc, p_list) {
87			if (p->p_sysent == &ibcs2_svr3_sysvec) {
88				rval = EBUSY;
89				break;
90			}
91		}
92		sx_sunlock(&allproc_lock);
93	default:
94	        /* do not care */
95	}
96	return (rval);
97}
98static moduledata_t ibcs2_mod = {
99	"ibcs2",
100	ibcs2_modevent,
101	0
102};
103DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
104