ibcs2_sysvec.c revision 153997 
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
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: head/sys/i386/ibcs2/ibcs2_sysvec.c 153997 2006-01-03 20:39:38Z jhb $");
33
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/systm.h>
37#include <sys/exec.h>
38#include <sys/imgact.h>
39#include <sys/lock.h>
40#include <sys/module.h>
41#include <sys/sysent.h>
42#include <sys/signalvar.h>
43#include <sys/proc.h>
44#include <sys/sx.h>
45
46#include <vm/vm.h>
47#include <vm/pmap.h>
48#include <vm/vm_param.h>
49
50#include <i386/ibcs2/ibcs2_syscall.h>
51#include <i386/ibcs2/ibcs2_signal.h>
52
53MODULE_VERSION(ibcs2, 1);
54
55extern int bsd_to_ibcs2_errno[];
56extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
57extern int szsigcode;
58extern char sigcode[];
59static int ibcs2_fixup(register_t **, struct image_params *);
60
61struct sysentvec ibcs2_svr3_sysvec = {
62        sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
63        ibcs2_sysent,
64        0xFF,
65        IBCS2_SIGTBLSZ,
66        bsd_to_ibcs2_sig,
67        ELAST + 1,
68        bsd_to_ibcs2_errno,
69	NULL,		/* trap-to-signal translation function */
70	ibcs2_fixup,	/* fixup */
71	sendsig,
72	sigcode,	/* use generic trampoline */
73	&szsigcode,	/* use generic trampoline size */
74	NULL,		/* prepsyscall */
75	"IBCS2 COFF",
76	NULL,		/* we don't have a COFF coredump function */
77	NULL,
78	IBCS2_MINSIGSTKSZ,
79	PAGE_SIZE,
80	VM_MIN_ADDRESS,
81	VM_MAXUSER_ADDRESS,
82	USRSTACK,
83	PS_STRINGS,
84	VM_PROT_ALL,
85	exec_copyout_strings,
86	exec_setregs,
87	NULL
88};
89
90static int
91ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
92{
93
94	return (suword(--(*stack_base), imgp->args->argc));
95}
96
97/*
98 * Create an "ibcs2" module that does nothing but allow checking for
99 * the presence of the subsystem.
100 */
101static int
102ibcs2_modevent(module_t mod, int type, void *unused)
103{
104	struct proc *p = NULL;
105	int rval = 0;
106
107	switch(type) {
108	case MOD_LOAD:
109		break;
110	case MOD_UNLOAD:
111		/* if this was an ELF module we'd use elf_brand_inuse()... */
112		sx_slock(&allproc_lock);
113		LIST_FOREACH(p, &allproc, p_list) {
114			if (p->p_sysent == &ibcs2_svr3_sysvec) {
115				rval = EBUSY;
116				break;
117			}
118		}
119		sx_sunlock(&allproc_lock);
120		break;
121	default:
122	        rval = EOPNOTSUPP;
123		break;
124	}
125	return (rval);
126}
127static moduledata_t ibcs2_mod = {
128	"ibcs2",
129	ibcs2_modevent,
130	0
131};
132DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
133