1 /* $NetBSD: netbsd32_mod.c,v 1.15 2019/01/27 02:08:40 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: netbsd32_mod.c,v 1.15 2019/01/27 02:08:40 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/exec_elf.h> 47 #include <sys/module_hook.h> 48 49 #include <compat/netbsd32/netbsd32_sysctl.h> 50 #include <compat/netbsd32/netbsd32_kern_proc.h> 51 #include <compat/netbsd32/netbsd32_exec.h> 52 53 #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \ 54 sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1)) 55 56 struct compat32_80_modctl_hook_t compat32_80_modctl_hook; 57 58 # define DEPS1 "ksem,coredump,compat_util" 59 60 #if defined(EXEC_ELF32) 61 # define DEPS2 ",exec_elf32" 62 #else 63 # define DEPS2 "" 64 #endif 65 66 MODULE(MODULE_CLASS_EXEC, compat_netbsd32, DEPS1 DEPS2); 67 68 static struct execsw netbsd32_execsw[] = { 69 #ifdef EXEC_AOUT 70 { 71 .es_hdrsz = sizeof(struct netbsd32_exec), 72 .es_makecmds = exec_netbsd32_makecmds, 73 .u = { 74 .elf_probe_func = NULL, 75 }, 76 .es_emul = &emul_netbsd32, 77 .es_prio = EXECSW_PRIO_FIRST, 78 .es_arglen = 0, 79 .es_copyargs = netbsd32_copyargs, 80 .es_setregs = NULL, 81 .es_coredump = coredump_netbsd32, 82 .es_setup_stack = exec_setup_stack, 83 }, 84 #endif 85 #ifdef EXEC_ELF32 86 { 87 .es_hdrsz = sizeof (Elf32_Ehdr), 88 .es_makecmds = exec_elf32_makecmds, 89 .u = { 90 .elf_probe_func = netbsd32_elf32_probe, 91 }, 92 .es_emul = &emul_netbsd32, 93 .es_prio = EXECSW_PRIO_ANY, 94 .es_arglen = ELF32_AUXSIZE, 95 .es_copyargs = netbsd32_elf32_copyargs, 96 .es_setregs = NULL, 97 .es_coredump = coredump_elf32, 98 .es_setup_stack = exec_setup_stack, 99 }, 100 #endif 101 }; 102 103 static int 104 compat_netbsd32_modcmd(modcmd_t cmd, void *arg) 105 { 106 int error; 107 108 switch (cmd) { 109 case MODULE_CMD_INIT: 110 error = exec_add(netbsd32_execsw, 111 __arraycount(netbsd32_execsw)); 112 if (error == 0) { 113 netbsd32_sysctl_init(); 114 netbsd32_machdep_md_init(); 115 netbsd32_kern_proc_32_init(); 116 } 117 return error; 118 119 case MODULE_CMD_FINI: 120 netbsd32_machdep_md_fini(); 121 netbsd32_sysctl_fini(); 122 netbsd32_kern_proc_32_fini(); 123 124 error = exec_remove(netbsd32_execsw, 125 __arraycount(netbsd32_execsw)); 126 if (error) { 127 netbsd32_kern_proc_32_init(); 128 netbsd32_sysctl_init(); 129 netbsd32_machdep_md_init(); 130 } 131 return error; 132 133 default: 134 return ENOTTY; 135 } 136 } 137