1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 1995 Steven Wallace
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Steven Wallace.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/systm.h>
39 #include <sys/exec.h>
40 #include <sys/imgact.h>
41 #include <sys/lock.h>
42 #include <sys/module.h>
43 #include <sys/sysent.h>
44 #include <sys/signalvar.h>
45 #include <sys/proc.h>
46 #include <sys/sx.h>
47
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50 #include <vm/vm_param.h>
51
52 #include <i386/ibcs2/ibcs2_syscall.h>
53 #include <i386/ibcs2/ibcs2_signal.h>
54
55 MODULE_VERSION(ibcs2, 1);
56
57 extern int bsd_to_ibcs2_errno[];
58 extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
59 static int ibcs2_fixup(register_t **, struct image_params *);
60
61 struct sysentvec ibcs2_svr3_sysvec = {
62 .sv_size = nitems(ibcs2_sysent),
63 .sv_table = ibcs2_sysent,
64 .sv_mask = 0xff,
65 .sv_sigsize = IBCS2_SIGTBLSZ,
66 .sv_sigtbl = bsd_to_ibcs2_sig,
67 .sv_errsize = ELAST + 1,
68 .sv_errtbl = bsd_to_ibcs2_errno,
69 .sv_transtrap = NULL,
70 .sv_fixup = ibcs2_fixup,
71 .sv_sendsig = sendsig,
72 .sv_sigcode = sigcode, /* use generic trampoline */
73 .sv_szsigcode = &szsigcode,
74 .sv_prepsyscall = NULL,
75 .sv_name = "IBCS2 COFF",
76 .sv_coredump = NULL, /* we don't have a COFF coredump function */
77 .sv_imgact_try = NULL,
78 .sv_minsigstksz = IBCS2_MINSIGSTKSZ,
79 .sv_pagesize = PAGE_SIZE,
80 .sv_minuser = VM_MIN_ADDRESS,
81 .sv_maxuser = VM_MAXUSER_ADDRESS,
82 .sv_usrstack = USRSTACK,
83 .sv_psstrings = PS_STRINGS,
84 .sv_stackprot = VM_PROT_ALL,
85 .sv_copyout_strings = exec_copyout_strings,
86 .sv_setregs = exec_setregs,
87 .sv_fixlimit = NULL,
88 .sv_maxssiz = NULL,
89 .sv_flags = SV_ABI_UNDEF | SV_IA32 | SV_ILP32,
90 .sv_set_syscall_retval = cpu_set_syscall_retval,
91 .sv_fetch_syscall_args = cpu_fetch_syscall_args,
92 .sv_syscallnames = NULL,
93 .sv_schedtail = NULL,
94 .sv_thread_detach = NULL,
95 .sv_trap = NULL,
96 };
97
98 static int
ibcs2_fixup(register_t ** stack_base,struct image_params * imgp)99 ibcs2_fixup(register_t **stack_base, struct image_params *imgp)
100 {
101
102 return (suword(--(*stack_base), imgp->args->argc));
103 }
104
105 /*
106 * Create an "ibcs2" module that does nothing but allow checking for
107 * the presence of the subsystem.
108 */
109 static int
ibcs2_modevent(module_t mod,int type,void * unused)110 ibcs2_modevent(module_t mod, int type, void *unused)
111 {
112 struct proc *p = NULL;
113 int rval = 0;
114
115 switch(type) {
116 case MOD_LOAD:
117 break;
118 case MOD_UNLOAD:
119 /* if this was an ELF module we'd use elf_brand_inuse()... */
120 sx_slock(&allproc_lock);
121 FOREACH_PROC_IN_SYSTEM(p) {
122 if (p->p_sysent == &ibcs2_svr3_sysvec) {
123 rval = EBUSY;
124 break;
125 }
126 }
127 sx_sunlock(&allproc_lock);
128 break;
129 default:
130 rval = EOPNOTSUPP;
131 break;
132 }
133 return (rval);
134 }
135 static moduledata_t ibcs2_mod = {
136 "ibcs2",
137 ibcs2_modevent,
138 0
139 };
140 DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
141