| 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 | |