1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.45 2019/06/07 23:35:53 christos Exp $ */
2 /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
3
4 /*
5 * Copyright (c) 1998, 2001 Matthew R. Green.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /*
30 * Copyright (c) 1993, 1994 Christopher G. Demetriou
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by Christopher G. Demetriou.
44 * 4. The name of the author may not be used to endorse or promote products
45 * derived from this software without specific prior written permission
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 */
58
59 #include <sys/cdefs.h>
60 __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_elf32.c,v 1.45 2019/06/07 23:35:53 christos Exp $");
61
62 #define ELFSIZE 32
63
64 #include <sys/param.h>
65 #include <sys/systm.h>
66 #include <sys/proc.h>
67 #include <sys/vnode.h>
68 #include <sys/exec.h>
69 #include <sys/exec_elf.h>
70 #include <sys/resourcevar.h>
71 #include <sys/signal.h>
72 #include <sys/signalvar.h>
73 #include <sys/kauth.h>
74 #include <sys/namei.h>
75 #include <sys/compat_stub.h>
76
77 #include <compat/common/compat_util.h>
78
79 #include <compat/netbsd32/netbsd32.h>
80 #include <compat/netbsd32/netbsd32_exec.h>
81
82 #include <machine/netbsd32_machdep.h>
83
84 int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp,
85 void *eh, char *itp, vaddr_t *pos);
86 extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *,
87 Elf_Ehdr *);
88
89 int
ELFNAME2(netbsd32,probe)90 ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp,
91 void *eh, char *itp, vaddr_t *pos)
92 {
93 int error;
94
95 if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0)
96 return error;
97
98 #ifdef ELF_MD_PROBE_FUNC
99 if ((error = ELF_MD_PROBE_FUNC(l, epp, eh, itp, pos)) != 0)
100 return error;
101 #elif defined(ELF_INTERP_NON_RELOCATABLE)
102 *pos = ELF_LINK_ADDR;
103 #endif
104
105 return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos);
106 }
107
108 int
ELFNAME2(netbsd32,probe_noteless)109 ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp,
110 void *eh, char *itp, vaddr_t *pos)
111 {
112 const char *m;
113
114 if (itp && epp->ep_interp == NULL) {
115 MODULE_HOOK_CALL(netbsd32_machine32_hook, (), machine, m);
116 (void)compat_elf_check_interp(epp, itp, m);
117 }
118 #ifdef _LP64
119 epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX;
120 #endif
121 epp->ep_vm_minaddr = exec_vm_minaddr(VM_MIN_ADDRESS);
122 epp->ep_vm_maxaddr = USRSTACK32;
123 #ifdef ELF_INTERP_NON_RELOCATABLE
124 *pos = ELF_LINK_ADDR;
125 #endif
126 return 0;
127 }
128
129 /*
130 * Copy arguments onto the stack in the normal way, but add some
131 * extra information in case of dynamic binding.
132 */
133 int
netbsd32_elf32_copyargs(struct lwp * l,struct exec_package * pack,struct ps_strings * arginfo,char ** stackp,void * argp)134 netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
135 struct ps_strings *arginfo, char **stackp, void *argp)
136 {
137 int error;
138
139 if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
140 return error;
141
142 return elf32_populate_auxv(l, pack, stackp);
143 }
144