ibcs2_sysvec.c revision 102808 
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 102808 2002-09-01 21:41:24Z jake $
31 */
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/systm.h>
36#include <sys/exec.h>
37#include <sys/imgact.h>
38#include <sys/lock.h>
39#include <sys/module.h>
40#include <sys/sysent.h>
41#include <sys/signalvar.h>
42#include <sys/proc.h>
43#include <sys/sx.h>
44
45#include <vm/vm.h>
46#include <vm/pmap.h>
47#include <vm/vm_param.h>
48
49#include <i386/ibcs2/ibcs2_syscall.h>
50#include <i386/ibcs2/ibcs2_signal.h>
51
52MODULE_VERSION(ibcs2, 1);
53
54extern int bsd_to_ibcs2_errno[];
55extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
56extern int szsigcode;
57extern char sigcode[];
58static int ibcs2_fixup(register_t **, struct image_params *);
59
60struct sysentvec ibcs2_svr3_sysvec = {
61        sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
62        ibcs2_sysent,
63        0xFF,
64        IBCS2_SIGTBLSZ,
65        bsd_to_ibcs2_sig,
66        ELAST + 1,
67        bsd_to_ibcs2_errno,
68	NULL,		/* trap-to-signal translation function */
69	ibcs2_fixup,	/* fixup */
70	sendsig,
71	sigcode,	/* use generic trampoline */
72	&szsigcode,	/* use generic trampoline size */
73	NULL,		/* prepsyscall */
74	"IBCS2 COFF",
75	NULL,		/* we don't have a COFF coredump function */
76	NULL,
77	IBCS2_MINSIGSTKSZ,
78	PAGE_SIZE,
79	VM_MIN_ADDRESS,
80	VM_MAXUSER_ADDRESS,
81	USRSTACK,
82	PS_STRINGS,
83	VM_PROT_ALL,
84	exec_copyout_strings,
85	exec_setregs
86};
87
88static int
89ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
90{
91
92	return (suword(--(*stack_base), imgp->argc));
93}
94
95/*
96 * Create an "ibcs2" module that does nothing but allow checking for
97 * the presence of the subsystem.
98 */
99static int
100ibcs2_modevent(module_t mod, int type, void *unused)
101{
102	struct proc *p = NULL;
103	int rval = 0;
104
105	switch(type) {
106	case MOD_UNLOAD:
107		/* if this was an ELF module we'd use elf_brand_inuse()... */
108		sx_slock(&allproc_lock);
109		LIST_FOREACH(p, &allproc, p_list) {
110			if (p->p_sysent == &ibcs2_svr3_sysvec) {
111				rval = EBUSY;
112				break;
113			}
114		}
115		sx_sunlock(&allproc_lock);
116	default:
117	        /* do not care */
118		break;
119	}
120	return (rval);
121}
122static moduledata_t ibcs2_mod = {
123	"ibcs2",
124	ibcs2_modevent,
125	0
126};
127DECLARE_MODULE(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
128