1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <stdio.h> 29 #include <unistd.h> 30 #include <string.h> 31 #include <sys/systeminfo.h> 32 #include <sys/param.h> 33 #include <sys/auxv.h> 34 #include "_conv.h" 35 #include "arch_msg.h" 36 37 /* 38 * Determine if the 32-bit or 64-bit kernel is running. 39 * Return the corresponding EI_CLASS constant. 40 */ 41 int 42 conv_sys_eclass() 43 { 44 char buf[BUFSIZ]; 45 46 /* 47 * SI_ISALIST will return -1 on pre-2.6 machines, 48 * which is fine - it can't be a 64-bit kernel. 49 */ 50 if (sysinfo(SI_ISALIST, buf, BUFSIZ) == -1) 51 return (ELFCLASS32); 52 53 if ((strstr(buf, MSG_ORIG(MSG_ARCH_SPARCV9)) != NULL) || 54 (strstr(buf, MSG_ORIG(MSG_ARCH_AMD64)) != NULL)) 55 return (ELFCLASS64); 56 57 return (ELFCLASS32); 58 } 59 60 #if defined(_LP64) 61 /* ARGSUSED */ 62 void 63 conv_check_native(char **argv, char **envp) 64 { 65 /* ia32 & 64-bit sparc version does nothing */ 66 } 67 68 #else 69 70 /* 71 * Wrapper for isaexec(3c) that allows disabling 64-bit counterpart execution 72 * via setting LD_NOEXEC64=yes. 73 * 74 * The only callers are 32-bit sgs applications. These applications determine 75 * whether a 64-bit counterpart is available via this routine, and if not, 76 * control is passed back to the caller, who will then complete execution. 77 * Note, isaexec() will eventually fall through to looking for a 32-bit 78 * counterpart (ie. sparcv7, or sparc), but as none of the callers provide these 79 * counterparts, we simply return to the caller. 80 */ 81 void 82 conv_check_native(char **argv, char **envp) 83 { 84 char *str; 85 86 /* 87 * LD_NOEXEC_64 defined in the environment prevents the isaexec() call. 88 * This is used by the test suite to test 32-bit support libraries. 89 */ 90 if (((str = getenv(MSG_ORIG(MSG_LD_NOEXEC64))) != NULL) && *str) 91 return; 92 93 (void) isaexec(getexecname(), argv, envp); 94 } 95 #endif 96