| 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 | |