1 | /* $NetBSD: exec_elf32.c,v 1.141 2014/07/22 08:18:33 maxv Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 1996 Christopher G. Demetriou |
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 Christopher G. Demetriou |
18 | * for the NetBSD Project. |
19 | * 4. The name of the author may not be used to endorse or promote products |
20 | * derived from this software without specific prior written permission |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
25 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
26 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
27 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
28 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
29 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
30 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
31 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
32 | */ |
33 | |
34 | #include <sys/cdefs.h> |
35 | __KERNEL_RCSID(0, "$NetBSD: exec_elf32.c,v 1.141 2014/07/22 08:18:33 maxv Exp $" ); |
36 | |
37 | #define ELFSIZE 32 |
38 | |
39 | #include "exec_elf.c" |
40 | |
41 | #include <sys/module.h> |
42 | |
43 | #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \ |
44 | sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1)) |
45 | |
46 | #ifdef COREDUMP |
47 | #define DEP "coredump" |
48 | #else |
49 | #define DEP NULL |
50 | #endif |
51 | |
52 | MODULE(MODULE_CLASS_EXEC, exec_elf32, DEP); |
53 | |
54 | static struct execsw exec_elf32_execsw[] = { |
55 | { |
56 | .es_hdrsz = sizeof (Elf32_Ehdr), |
57 | .es_makecmds = exec_elf32_makecmds, |
58 | .u = { |
59 | .elf_probe_func = netbsd_elf32_probe, |
60 | }, |
61 | .es_emul = &emul_netbsd, |
62 | .es_prio = EXECSW_PRIO_FIRST, |
63 | .es_arglen = ELF32_AUXSIZE, |
64 | .es_copyargs = elf32_copyargs, |
65 | .es_setregs = NULL, |
66 | .es_coredump = coredump_elf32, |
67 | .es_setup_stack = exec_setup_stack, |
68 | }, |
69 | #if EXEC_ELF_NOTELESS |
70 | { |
71 | .es_hdrsz = sizeof (Elf32_Ehdr), |
72 | .es_makecmds = exec_elf32_makecmds, |
73 | .u { |
74 | elf_probe_func = NULL, |
75 | }, |
76 | .es_emul = &emul_netbsd, |
77 | .es_prio = EXECSW_PRIO_LAST, |
78 | .es_arglen = ELF32_AUXSIZE, |
79 | .es_copyargs = elf32_copyargs, |
80 | .es_setregs = NULL, |
81 | .es_coredump = coredump_elf32, |
82 | .es_setup_stack = exec_setup_stack, |
83 | }, |
84 | #endif |
85 | }; |
86 | |
87 | static int |
88 | exec_elf32_modcmd(modcmd_t cmd, void *arg) |
89 | { |
90 | #if ARCH_ELFSIZE == 64 |
91 | /* |
92 | * If we are on a 64bit system, we don't want the 32bit execsw[] to be |
93 | * added in the global array, because the exec_elf32 module only works |
94 | * on 32bit systems. |
95 | * |
96 | * However, we need the exec_elf32 module, because it will make the 32bit |
97 | * functions available for netbsd32 and linux32. |
98 | * |
99 | * Therefore, allow this module on 64bit systems, but make it dormant. |
100 | */ |
101 | |
102 | (void)exec_elf32_execsw; /* unused */ |
103 | |
104 | switch (cmd) { |
105 | case MODULE_CMD_INIT: |
106 | case MODULE_CMD_FINI: |
107 | return 0; |
108 | default: |
109 | return ENOTTY; |
110 | } |
111 | #else /* ARCH_ELFSIZE == 64 */ |
112 | switch (cmd) { |
113 | case MODULE_CMD_INIT: |
114 | return exec_add(exec_elf32_execsw, |
115 | __arraycount(exec_elf32_execsw)); |
116 | |
117 | case MODULE_CMD_FINI: |
118 | return exec_remove(exec_elf32_execsw, |
119 | __arraycount(exec_elf32_execsw)); |
120 | |
121 | default: |
122 | return ENOTTY; |
123 | } |
124 | #endif /* ARCH_ELFSIZE == 64 */ |
125 | } |
126 | |