ibcs2_sysvec.c revision 294136 
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: stable/10/sys/i386/ibcs2/ibcs2_sysvec.c 294136 2016-01-16 07:56:49Z dchagin $");
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];
57static int ibcs2_fixup(register_t **, struct image_params *);
58
59struct sysentvec ibcs2_svr3_sysvec = {
60        .sv_size	= sizeof (ibcs2_sysent) / sizeof (ibcs2_sysent[0]),
61        .sv_table	= ibcs2_sysent,
62        .sv_mask	= 0xff,
63        .sv_sigsize	= IBCS2_SIGTBLSZ,
64        .sv_sigtbl	= bsd_to_ibcs2_sig,
65        .sv_errsize	= ELAST + 1,
66        .sv_errtbl	= bsd_to_ibcs2_errno,
67	.sv_transtrap	= NULL,
68	.sv_fixup	= ibcs2_fixup,
69	.sv_sendsig	= sendsig,
70	.sv_sigcode	= sigcode,	/* use generic trampoline */
71	.sv_szsigcode	= &szsigcode,
72	.sv_prepsyscall	= NULL,
73	.sv_name	= "IBCS2 COFF",
74	.sv_coredump	= NULL,	/* we don't have a COFF coredump function */
75	.sv_imgact_try	= NULL,
76	.sv_minsigstksz	= IBCS2_MINSIGSTKSZ,
77	.sv_pagesize	= PAGE_SIZE,
78	.sv_minuser	= VM_MIN_ADDRESS,
79	.sv_maxuser	= VM_MAXUSER_ADDRESS,
80	.sv_usrstack	= USRSTACK,
81	.sv_psstrings	= PS_STRINGS,
82	.sv_stackprot	= VM_PROT_ALL,
83	.sv_copyout_strings = exec_copyout_strings,
84	.sv_setregs	= exec_setregs,
85	.sv_fixlimit	= NULL,
86	.sv_maxssiz	= NULL,
87	.sv_flags	= SV_ABI_UNDEF | SV_IA32 | SV_ILP32,
88	.sv_set_syscall_retval = cpu_set_syscall_retval,
89	.sv_fetch_syscall_args = cpu_fetch_syscall_args,
90	.sv_syscallnames = NULL,
91	.sv_schedtail	= NULL,
92	.sv_thread_detach = NULL,
93	.sv_trap	= NULL,
94};
95
96static int
97ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
98{
99
100	return (suword(--(*stack_base), imgp->args->argc));
101}
102
103/*
104 * Create an "ibcs2" module that does nothing but allow checking for
105 * the presence of the subsystem.
106 */
107static int
108ibcs2_modevent(module_t mod, int type, void *unused)
109{
110	struct proc *p = NULL;
111	int rval = 0;
112
113	switch(type) {
114	case MOD_LOAD:
115		break;
116	case MOD_UNLOAD:
117		/* if this was an ELF module we'd use elf_brand_inuse()... */
118		sx_slock(&allproc_lock);
119		FOREACH_PROC_IN_SYSTEM(p) {
120			if (p->p_sysent == &ibcs2_svr3_sysvec) {
121				rval = EBUSY;
122				break;
123			}
124		}
125		sx_sunlock(&allproc_lock);
126		break;
127	default:
128	        rval = EOPNOTSUPP;
129		break;
130	}
131	return (rval);
132}
133static moduledata_t ibcs2_mod = {
134	"ibcs2",
135	ibcs2_modevent,
136	0
137};
138DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
139