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("$FreeBSD$");
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
53 MODULE_VERSION(ibcs2, 1);
54
55 extern int bsd_to_ibcs2_errno[];
56 extern struct sysent ibcs2_sysent[IBCS2_SYS_MAXSYSCALL];
57 static int ibcs2_fixup(register_t **, struct image_params *);
58
59 struct sysentvec ibcs2_svr3_sysvec = {
60 .sv_size = nitems(ibcs2_sysent),
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
96 static int
ibcs2_fixup(register_t ** stack_base,struct image_params * imgp)97 ibcs2_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 */
107 static int
ibcs2_modevent(module_t mod,int type,void * unused)108 ibcs2_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 }
133 static moduledata_t ibcs2_mod = {
134 "ibcs2",
135 ibcs2_modevent,
136 0
137 };
138 DECLARE_MODULE_TIED(ibcs2, ibcs2_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
139