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 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Block comment which describes the contents of this file. 31 */ 32 33 #include <_synonyms.h> 34 #include <string.h> 35 #include <dlfcn.h> 36 #include <debug.h> 37 #include <_rtld.h> 38 #include <_elf.h> 39 #include <msg.h> 40 41 #include <stdio.h> 42 43 static Dl_amd64_unwindinfo * 44 getunwind_core(void * pc, Dl_amd64_unwindinfo *unwindinfo) 45 { 46 Rt_map *lmp; 47 48 /* 49 * Validate the version information 50 */ 51 if (unwindinfo == NULL) { 52 eprintf(ERR_FATAL, MSG_INTL(MSG_ARG_ILLVAL)); 53 return (0); 54 } 55 if ((unwindinfo->dlui_version < DLUI_VERS_1) || 56 (unwindinfo->dlui_version > DLUI_VERS_CURRENT)) { 57 eprintf(ERR_FATAL, MSG_INTL(MSG_UNW_BADVERS), 58 DLUI_VERS_CURRENT, unwindinfo->dlui_version); 59 return (0); 60 } 61 /* 62 * clean out the structure 63 */ 64 unwindinfo->dlui_flags = 0; 65 unwindinfo->dlui_objname = 0; 66 unwindinfo->dlui_unwindstart = 0; 67 unwindinfo->dlui_unwindend = 0; 68 unwindinfo->dlui_segstart = 0; 69 unwindinfo->dlui_segend = 0; 70 71 lmp = _caller(pc, 0); 72 if (lmp) { 73 Mmap *immap; 74 unwindinfo->dlui_objname = PATHNAME(lmp); 75 /* 76 * Scan through the mmaps of this object to get 77 * the specific segment found. 78 */ 79 for (immap = MMAPS(lmp); immap->m_vaddr; immap++) { 80 if (((caddr_t)pc >= immap->m_vaddr) && 81 ((caddr_t)pc < (immap->m_vaddr + immap->m_msize))) { 82 break; 83 } 84 } 85 unwindinfo->dlui_segstart = immap->m_vaddr; 86 unwindinfo->dlui_segend = immap->m_vaddr + immap->m_msize; 87 if (PTUNWIND(lmp) && (immap->m_vaddr)) { 88 uintptr_t base; 89 if (FLAGS(lmp) & FLG_RT_FIXED) 90 base = 0; 91 else 92 base = ADDR(lmp); 93 unwindinfo->dlui_unwindstart = 94 (void *)(PTUNWIND(lmp)->p_vaddr + base); 95 unwindinfo->dlui_unwindend = 96 (void *)(PTUNWIND(lmp)->p_vaddr + 97 PTUNWIND(lmp)->p_memsz + base); 98 } else if (immap->m_vaddr) { 99 unwindinfo->dlui_flags |= DLUI_FLG_NOUNWIND; 100 } else { 101 unwindinfo->dlui_flags |= 102 DLUI_FLG_NOUNWIND | DLUI_FLG_NOOBJ; 103 } 104 } else { 105 /* 106 * No object found 107 */ 108 unwindinfo->dlui_flags = DLUI_FLG_NOOBJ | DLUI_FLG_NOUNWIND; 109 } 110 return (unwindinfo); 111 } 112 113 #pragma weak dlamd64getunwind = _dlamd64getunwind 114 Dl_amd64_unwindinfo * 115 _dlamd64getunwind(void * pc, Dl_amd64_unwindinfo *unwindinfo) 116 { 117 int entry; 118 119 120 entry = enter(); 121 122 unwindinfo = getunwind_core(pc, unwindinfo); 123 124 if (entry) 125 leave(0); 126 127 return (unwindinfo); 128 } 129