1 /* $NetBSD: linux_mod.c,v 1.6 2015/12/03 02:51:01 pgoyette 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: linux_mod.c,v 1.6 2015/12/03 02:51:01 pgoyette Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_execfmt.h" 37 #endif 38 39 #ifndef ELFSIZE 40 #define ELFSIZE ARCH_ELFSIZE 41 #endif 42 43 #include <sys/param.h> 44 #include <sys/module.h> 45 #include <sys/exec.h> 46 #include <sys/signalvar.h> 47 48 #include <compat/linux/common/linux_sysctl.h> 49 #include <compat/linux/common/linux_futex.h> 50 #include <compat/linux/common/linux_exec.h> 51 52 #if defined(EXEC_ELF32) && ELFSIZE == 32 53 # define MD1 ",exec_elf32" 54 #else 55 # define MD1 "" 56 #endif 57 #if defined(EXEC_ELF64) 58 # define MD2 ",exec_elf64" 59 #else 60 # define MD2 "" 61 #endif 62 #if defined(EXEC_AOUT) 63 # define MD3 ",exec_aout" 64 #else 65 # define MD3 "" 66 #endif 67 68 MODULE(MODULE_CLASS_EXEC, compat_linux, "compat,compat_ossaudio,sysv_ipc" 69 MD1 MD2 MD3); 70 71 static struct execsw linux_execsw[] = { 72 #if defined(EXEC_ELF32) && ELFSIZE == 32 73 { 74 .es_hdrsz = sizeof (Elf32_Ehdr), 75 .es_makecmds = exec_elf32_makecmds, 76 .u = { 77 .elf_probe_func = linux_elf32_probe, 78 }, 79 .es_emul = &emul_linux, 80 .es_prio = EXECSW_PRIO_ANY, 81 .es_arglen = LINUX_ELF_AUX_ARGSIZ, 82 .es_copyargs = linux_elf32_copyargs, 83 .es_setregs = NULL, 84 .es_coredump = coredump_elf32, 85 .es_setup_stack = linux_exec_setup_stack, 86 }, 87 #elif defined(EXEC_ELF64) 88 { 89 .es_hdrsz = sizeof (Elf64_Ehdr), 90 .es_makecmds = exec_elf64_makecmds, 91 .u = { 92 .elf_probe_func = linux_elf64_probe, 93 }, 94 .es_emul = &emul_linux, 95 .es_prio = EXECSW_PRIO_ANY, 96 .es_arglen = LINUX_ELF_AUX_ARGSIZ, 97 .es_copyargs = linux_elf64_copyargs, 98 .es_setregs = NULL, 99 .es_coredump = coredump_elf64, 100 .es_setup_stack = linux_exec_setup_stack, 101 }, 102 #endif 103 #ifdef EXEC_AOUT 104 { 105 .es_hdrsz = LINUX_AOUT_HDR_SIZE, 106 .es_makecmds = exec_linux_aout_makecmds, 107 .u = { 108 .elf_probe_func = NULL, 109 }, 110 .es_emul = &emul_linux, 111 .es_prio = EXECSW_PRIO_LAST, 112 .es_arglen = LINUX_AOUT_AUX_ARGSIZ, 113 .es_copyargs = linux_aout_copyargs, 114 .es_setregs = NULL, 115 .es_coredump = coredump_netbsd, 116 .es_setup_stack = linux_exec_setup_stack, 117 }, 118 #endif 119 }; 120 121 static int 122 compat_linux_modcmd(modcmd_t cmd, void *arg) 123 { 124 int error; 125 126 switch (cmd) { 127 case MODULE_CMD_INIT: 128 linux_futex_init(); 129 linux_sysctl_init(); 130 error = exec_add(linux_execsw, 131 __arraycount(linux_execsw)); 132 if (error != 0) 133 linux_sysctl_fini(); 134 return error; 135 136 case MODULE_CMD_FINI: 137 error = exec_remove(linux_execsw, 138 __arraycount(linux_execsw)); 139 if (error == 0) { 140 linux_sysctl_fini(); 141 linux_futex_fini(); 142 } 143 return error; 144 145 default: 146 return ENOTTY; 147 } 148 } 149