142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/* $NetBSD: linux32_mod.c,v 1.11 2017/12/10 00:43:05 kre Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software developed for The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux32_mod.c,v 1.11 2017/12/10 00:43:05 kre Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_execfmt.h"
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#endif
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#ifndef ELFSIZE
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#define ELFSIZE ARCH_ELFSIZE
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#endif
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#include <sys/param.h>
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#include <sys/module.h>
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#include <sys/exec.h>
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#include <sys/signalvar.h>
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#include <sys/sysctl.h>
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#include <compat/linux/common/linux_exec.h>
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#include <compat/linux32/common/linux32_sysctl.h>
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#include <compat/linux32/common/linux32_exec.h>
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#if defined(EXEC_ELF32)
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# define MD1 ",exec_elf32,compat_netbsd32,compat_netbsd32_sysvipc"
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#else
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# define MD1 ""
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#endif
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MODULE(MODULE_CLASS_EXEC, compat_linux32, "compat_linux" MD1);
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static struct execsw linux32_execsw[] = {
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#if defined(EXEC_ELF32)
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{
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.es_hdrsz = sizeof (Elf32_Ehdr),
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.es_makecmds = exec_elf32_makecmds,
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.u = {
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.elf_probe_func = linux32_elf32_probe,
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},
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.es_emul = &emul_linux32,
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.es_prio = EXECSW_PRIO_ANY,
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.es_arglen = LINUX32_ELF_AUX_ARGSIZ,
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.es_copyargs = linux32_elf32_copyargs,
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.es_setregs = NULL,
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.es_coredump = coredump_elf32,
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.es_setup_stack = linux_exec_setup_stack,
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},
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#endif
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};
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int linux32_enabled = 1;
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int
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linux32_sysctl_enable(SYSCTLFN_ARGS)
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{
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struct sysctlnode node;
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int error, val;
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val = *(int *)rnode->sysctl_data;
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node = *rnode;
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node.sysctl_data = &val;
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error = sysctl_lookup(SYSCTLFN_CALL(&node));
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if (error != 0 || newp == NULL)
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return error;
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if (val == *(int *)rnode->sysctl_data)
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return 0;
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if (val == 1)
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error = exec_add(linux32_execsw, __arraycount(linux32_execsw));
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else if (val == 0)
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error =
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exec_remove(linux32_execsw, __arraycount(linux32_execsw));
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else
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error = EINVAL;
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if (error)
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return error;
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*(int *)rnode->sysctl_data = val;
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return 0;
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}
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static int
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compat_linux32_modcmd(modcmd_t cmd, void *arg)
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{
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int error;
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switch (cmd) {
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case MODULE_CMD_INIT:
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linux32_sysctl_init();
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error = exec_add(linux32_execsw, __arraycount(linux32_execsw));
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if (error != 0)
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linux32_sysctl_fini();
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return error;
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case MODULE_CMD_FINI:
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error =
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exec_remove(linux32_execsw, __arraycount(linux32_execsw));
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if (error)
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return error;
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linux32_sysctl_fini();
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return 0;
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default:
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return ENOTTY;
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}
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}
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