1/* $NetBSD: netbsd32_exec_elf32.c,v 1.40 2016/08/06 15:13:13 maxv 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 1.40 2016/08/06 15:13:13 maxv 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
76#include <compat/common/compat_util.h>
77
78#include <compat/netbsd32/netbsd32.h>
79#include <compat/netbsd32/netbsd32_exec.h>
80
81#include <machine/netbsd32_machdep.h>
82
83int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp,
84 void *eh, char *itp, vaddr_t *pos);
85extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *,
86 Elf_Ehdr *);
87
88int
89ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp,
90 void *eh, char *itp, vaddr_t *pos)
91{
92 int error;
93
94 if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0)
95 return error;
96
97#ifdef ELF_MD_PROBE_FUNC
98 if ((error = ELF_MD_PROBE_FUNC(l, epp, eh, itp, pos)) != 0)
99 return error;
100#elif defined(ELF_INTERP_NON_RELOCATABLE)
101 *pos = ELF_LINK_ADDR;
102#endif
103
104 return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos);
105}
106
107int
108ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp,
109 void *eh, char *itp, vaddr_t *pos)
110{
111 if (itp && epp->ep_interp == NULL) {
112 extern const char machine32[];
113 (void)compat_elf_check_interp(epp, itp, machine32);
114 }
115#ifdef _LP64
116 epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX;
117#endif
118 epp->ep_vm_minaddr = exec_vm_minaddr(VM_MIN_ADDRESS);
119 epp->ep_vm_maxaddr = USRSTACK32;
120#ifdef ELF_INTERP_NON_RELOCATABLE
121 *pos = ELF_LINK_ADDR;
122#endif
123 return 0;
124}
125
126/*
127 * Copy arguments onto the stack in the normal way, but add some
128 * extra information in case of dynamic binding.
129 */
130int
131netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
132 struct ps_strings *arginfo, char **stackp, void *argp)
133{
134 size_t len;
135 AuxInfo ai[ELF_AUX_ENTRIES], *a;
136 struct elf_args *ap;
137 int error;
138
139 if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
140 return error;
141
142 a = ai;
143
144 memset(ai, 0, sizeof(ai));
145
146 /*
147 * Push extra arguments on the stack needed by dynamically
148 * linked binaries
149 */
150 if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
151
152 a->a_type = AT_PHDR;
153 a->a_v = ap->arg_phaddr;
154 a++;
155
156 a->a_type = AT_PHENT;
157 a->a_v = ap->arg_phentsize;
158 a++;
159
160 a->a_type = AT_PHNUM;
161 a->a_v = ap->arg_phnum;
162 a++;
163
164 a->a_type = AT_PAGESZ;
165 a->a_v = PAGE_SIZE;
166 a++;
167
168 a->a_type = AT_BASE;
169 a->a_v = ap->arg_interp;
170 a++;
171
172 a->a_type = AT_FLAGS;
173 a->a_v = 0;
174 a++;
175
176 a->a_type = AT_ENTRY;
177 a->a_v = ap->arg_entry;
178 a++;
179
180 a->a_type = AT_EUID;
181 a->a_v = kauth_cred_geteuid(l->l_cred);
182 a++;
183
184 a->a_type = AT_RUID;
185 a->a_v = kauth_cred_getuid(l->l_cred);
186 a++;
187
188 a->a_type = AT_EGID;
189 a->a_v = kauth_cred_getegid(l->l_cred);
190 a++;
191
192 a->a_type = AT_RGID;
193 a->a_v = kauth_cred_getgid(l->l_cred);
194 a++;
195
196 exec_free_emul_arg(pack);
197 }
198
199 a->a_type = AT_NULL;
200 a->a_v = 0;
201 a++;
202
203 len = (a - ai) * sizeof(AuxInfo);
204 if ((error = copyout(ai, *stackp, len)) != 0)
205 return error;
206 *stackp += len;
207
208 return 0;
209}
210