1 /* Return tag of given DIE. 2 Copyright (C) 2003, 2004 Red Hat, Inc. 3 Written by Ulrich Drepper <drepper (at) redhat.com>, 2003. 4 5 This program is Open Source software; you can redistribute it and/or 6 modify it under the terms of the Open Software License version 1.0 as 7 published by the Open Source Initiative. 8 9 You should have received a copy of the Open Software License along 10 with this program; if not, you may obtain a copy of the Open Software 11 License version 1.0 from http://www.opensource.org/licenses/osl.php or 12 by writing the Open Source Initiative c/o Lawrence Rosen, Esq., 13 3001 King Ranch Road, Ukiah, CA 95482. */ 14 15 #ifdef HAVE_CONFIG_H 16 # include <config.h> 17 #endif 18 19 #include "libdwP.h" 20 21 22 Dwarf_Abbrev * 23 internal_function_def 24 __libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code) 25 { 26 Dwarf_Abbrev *abb; 27 28 /* See whether the entry is already in the hash table. */ 29 abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code, NULL); 30 if (abb == NULL) 31 while (cu->last_abbrev_offset != (size_t) -1l) 32 { 33 size_t length; 34 35 /* Find the next entry. It gets automatically added to the 36 hash table. */ 37 abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length, 38 NULL); 39 if (abb == NULL) 40 { 41 /* Make sure we do not try to search for it again. */ 42 cu->last_abbrev_offset = (size_t) -1l; 43 abb = (void *) -1l; 44 break; 45 } 46 47 cu->last_abbrev_offset += length; 48 49 /* Is this the code we are looking for? */ 50 if (abb->code == code) 51 break; 52 } 53 54 return abb; 55 } 56 57 58 int 59 dwarf_tag (die) 60 Dwarf_Die *die; 61 { 62 /* Do we already know the abbreviation? */ 63 if (die->abbrev == NULL) 64 { 65 /* Get the abbreviation code. */ 66 unsigned int u128; 67 unsigned char *addr = die->addr; 68 get_uleb128 (u128, addr); 69 70 /* Find the abbreviation. */ 71 die->abbrev = __libdw_findabbrev (die->cu, u128); 72 } 73 74 if (die->abbrev == (Dwarf_Abbrev *) -1l) 75 { 76 __libdw_seterrno (DWARF_E_INVALID_DWARF); 77 return DW_TAG_invalid; 78 } 79 80 return die->abbrev->tag; 81 } 82
