1 /* $NetBSD: cpu_exec.c,v 1.3 2012/08/11 07:18:53 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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: cpu_exec.c,v 1.3 2012/08/11 07:18:53 matt Exp $"); 34 35 #include "opt_compat_netbsd.h" 36 #include "opt_compat_netbsd32.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/proc.h> 41 #include <sys/exec.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <compat/common/compat_util.h> 46 #include <sys/exec_elf.h> /* mandatory */ 47 48 #ifdef COMPAT_NETBSD32 49 #include <compat/netbsd32/netbsd32_exec.h> 50 #endif 51 52 #if EXEC_ELF32 53 int 54 arm_netbsd_elf32_probe(struct lwp *l, struct exec_package *epp, void *eh0, 55 char *itp, vaddr_t *start_p) 56 { 57 const char *itp_suffix = NULL; 58 const Elf_Ehdr * const eh = eh0; 59 const bool elf_aapcs_p = 60 (eh->e_flags & EF_ARM_EABIMASK) >= EF_ARM_EABI_VER4; 61 #ifdef COMPAT_NETBSD32 62 const bool netbsd32_p = (epp->ep_esch->es_emul == &emul_netbsd32); 63 #else 64 const bool netbsd32_p = false; 65 #endif 66 #ifdef __ARM_EABI__ 67 const bool aapcs_p = true; 68 #else 69 const bool aapcs_p = false; 70 #endif 71 72 /* 73 * This is subtle. If are netbsd32, then we don't want to match the 74 * same ABI as the kernel. If we aren't (netbsd32 == false), then we 75 * don't want to be different from the kernel's ABI. 76 * true true true ENOEXEC 77 * true false true 0 78 * true true false 0 79 * true false false ENOEXEC 80 * false true true 0 81 * false false true ENOEXEC 82 * false true false ENOEXEC 83 * false false false 0 84 */ 85 if (netbsd32_p ^ elf_aapcs_p ^ aapcs_p) 86 return ENOEXEC; 87 88 if (netbsd32_p) 89 itp_suffix = (elf_aapcs_p) ? "eabi" : "oabi"; 90 91 if (itp_suffix != NULL) 92 (void)compat_elf_check_interp(epp, itp, itp_suffix); 93 return 0; 94 } 95 #endif 96