1 /* $NetBSD: freebsd_mod.c,v 1.5 2014/03/07 02:02:16 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software developed for The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: freebsd_mod.c,v 1.5 2014/03/07 02:02:16 christos Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_execfmt.h" 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/module.h> 41 #include <sys/exec.h> 42 #include <sys/exec_elf.h> 43 #include <sys/exec_aout.h> 44 #include <sys/signalvar.h> 45 46 #include <compat/freebsd/freebsd_exec.h> 47 #include <compat/freebsd/freebsd_sysctl.h> 48 49 #if defined(EXEC_ELF32) 50 # define MD1 ",exec_elf32" 51 #else 52 # define MD1 "" 53 #endif 54 #if defined(EXEC_AOUT) 55 # define MD2 ",exec_aout" 56 #else 57 # define MD2 "" 58 #endif 59 60 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \ 61 sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1)) 62 63 MODULE(MODULE_CLASS_EXEC, compat_freebsd, "compat,compat_ossaudio" MD1 MD2); 64 65 static struct execsw freebsd_execsw[] = { 66 #ifdef EXEC_ELF32 67 /* FreeBSD Elf32 (probe not 64-bit safe) */ 68 { 69 .es_hdrsz = sizeof (Elf32_Ehdr), 70 .es_makecmds = exec_elf32_makecmds, 71 .u = { 72 .elf_probe_func = freebsd_elf32_probe, 73 }, 74 .es_emul = &emul_freebsd, 75 .es_prio = EXECSW_PRIO_ANY, 76 .es_arglen = ELF32_AUXSIZE, 77 .es_copyargs = elf32_copyargs, 78 .es_setregs = NULL, 79 .es_coredump = coredump_elf32, 80 .es_setup_stack = exec_setup_stack, 81 }, 82 #endif 83 #ifdef EXEC_AOUT 84 /* FreeBSD a.out (native word size) */ 85 { 86 .es_hdrsz = FREEBSD_AOUT_HDR_SIZE, 87 .es_makecmds = exec_freebsd_aout_makecmds, 88 .u = { 89 .elf_probe_func = NULL, 90 }, 91 .es_emul = &emul_freebsd, 92 .es_prio = EXECSW_PRIO_ANY, 93 .es_arglen = 0, 94 .es_copyargs = copyargs, 95 .es_setregs = NULL, 96 .es_coredump = coredump_netbsd, 97 .es_setup_stack = exec_setup_stack, 98 }, 99 #endif 100 }; 101 102 static int 103 compat_freebsd_modcmd(modcmd_t cmd, void *arg) 104 { 105 int error; 106 107 switch (cmd) { 108 case MODULE_CMD_INIT: 109 freebsd_sysctl_init(); 110 error = exec_add(freebsd_execsw, 111 __arraycount(freebsd_execsw)); 112 if (error != 0) 113 freebsd_sysctl_fini(); 114 return error; 115 116 case MODULE_CMD_FINI: 117 error = exec_remove(freebsd_execsw, 118 __arraycount(freebsd_execsw)); 119 if (error == 0) 120 freebsd_sysctl_fini(); 121 return error; 122 123 default: 124 return ENOTTY; 125 } 126 } 127