/* $NetBSD: netbsd32_mod.c,v 1.15.4.4 2020/03/10 06:47:55 martin Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software developed for The NetBSD Foundation * by Andrew Doran. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1998, 2000, 2017 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Charles M. Hannum, and by Maxime Villard. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: netbsd32_mod.c,v 1.15.4.4 2020/03/10 06:47:55 martin Exp $"); #ifdef _KERNEL_OPT #include "opt_execfmt.h" #endif #ifndef ELFSIZE #define ELFSIZE ARCH_ELFSIZE #endif #include #include #include #include #include #include #include #include #include #define ELF32_AUXSIZE (howmany(ELF_AUX_ENTRIES * sizeof(Aux32Info), \ sizeof(Elf32_Addr)) + MAXPATHLEN + ALIGN(1)) struct compat32_80_modctl_hook_t compat32_80_modctl_hook; # define DEPS1 "ksem,coredump,compat_util" #if defined(EXEC_ELF32) # define DEPS2 ",exec_elf32" #else # define DEPS2 "" #endif MODULE(MODULE_CLASS_EXEC, compat_netbsd32, DEPS1 DEPS2); static struct execsw netbsd32_execsw[] = { #ifdef EXEC_AOUT { .es_hdrsz = sizeof(struct netbsd32_exec), .es_makecmds = exec_netbsd32_makecmds, .u = { .elf_probe_func = NULL, }, .es_emul = &emul_netbsd32, .es_prio = EXECSW_PRIO_FIRST, .es_arglen = 0, .es_copyargs = netbsd32_copyargs, .es_setregs = NULL, .es_coredump = coredump_netbsd32, .es_setup_stack = exec_setup_stack, }, #endif #ifdef EXEC_ELF32 { .es_hdrsz = sizeof (Elf32_Ehdr), .es_makecmds = exec_elf32_makecmds, .u = { .elf_probe_func = netbsd32_elf32_probe, }, .es_emul = &emul_netbsd32, .es_prio = EXECSW_PRIO_ANY, .es_arglen = ELF32_AUXSIZE, .es_copyargs = netbsd32_elf32_copyargs, .es_setregs = NULL, .es_coredump = coredump_elf32, .es_setup_stack = exec_setup_stack, }, #endif }; #if defined(__amd64__) /* This code was moved here, from $SRC/arch/amd64/amd64/trap.c */ static int amd64_oosyscall_handle(struct proc *p, struct trapframe *frame) { static const char lcall[7] = { 0x9a, 0, 0, 0, 0, 7, 0 }; const size_t sz = sizeof(lcall); char tmp[sizeof(lcall) /* Avoids VLA */]; /* Check for the oosyscall lcall instruction. */ if (p->p_emul == &emul_netbsd32 && frame->tf_rip < VM_MAXUSER_ADDRESS32 - sz && copyin((void *)frame->tf_rip, tmp, sz) == 0 && memcmp(tmp, lcall, sz) == 0) { /* Advance past the lcall and save instruction size. */ frame->tf_rip += sz; frame->tf_err = sz; return 0; } else return EPASSTHROUGH; } #endif /* defined(__amd64__) */ static int compat_netbsd32_modcmd(modcmd_t cmd, void *arg) { int error; switch (cmd) { case MODULE_CMD_INIT: error = exec_add(netbsd32_execsw, __arraycount(netbsd32_execsw)); if (error == 0) { netbsd32_sysctl_init(); netbsd32_machdep_md_init(); netbsd32_kern_proc_32_init(); #if defined(__amd64__) MODULE_HOOK_SET(amd64_oosyscall_hook, "nb32oo", amd64_oosyscall_handle); #endif /* defined(__amd64__) */ } return error; case MODULE_CMD_FINI: #if defined(__amd64__) MODULE_HOOK_UNSET(amd64_oosyscall_hook); #endif /* defined(__amd64__) */ netbsd32_machdep_md_fini(); netbsd32_sysctl_fini(); netbsd32_kern_proc_32_fini(); error = exec_remove(netbsd32_execsw, __arraycount(netbsd32_execsw)); if (error) { netbsd32_kern_proc_32_init(); netbsd32_sysctl_init(); netbsd32_machdep_md_init(); #if defined(__amd64__) MODULE_HOOK_SET(amd64_oosyscall_hook, "nb32oo", amd64_oosyscall_handle); #endif /* defined(__amd64__) */ } return error; default: return ENOTTY; } }