index-common.h revision 1.1.1.1
1/* Things needed for both reading and writing DWARF indices. 2 3 Copyright (C) 1994-2020 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20#ifndef DWARF_INDEX_COMMON_H 21#define DWARF_INDEX_COMMON_H 22 23/* The suffix for an index file. */ 24#define INDEX4_SUFFIX ".gdb-index" 25#define INDEX5_SUFFIX ".debug_names" 26#define DEBUG_STR_SUFFIX ".debug_str" 27 28/* All offsets in the index are of this type. It must be 29 architecture-independent. */ 30typedef uint32_t offset_type; 31 32#if WORDS_BIGENDIAN 33 34/* Convert VALUE between big- and little-endian. */ 35 36static inline offset_type 37byte_swap (offset_type value) 38{ 39 offset_type result; 40 41 result = (value & 0xff) << 24; 42 result |= (value & 0xff00) << 8; 43 result |= (value & 0xff0000) >> 8; 44 result |= (value & 0xff000000) >> 24; 45 return result; 46} 47 48#define MAYBE_SWAP(V) byte_swap (V) 49 50#else 51#define MAYBE_SWAP(V) static_cast<offset_type> (V) 52#endif /* WORDS_BIGENDIAN */ 53 54/* The hash function for strings in the mapped index. This is the same as 55 SYMBOL_HASH_NEXT, but we keep a separate copy to maintain control over the 56 implementation. This is necessary because the hash function is tied to the 57 format of the mapped index file. The hash values do not have to match with 58 SYMBOL_HASH_NEXT. 59 60 Use INT_MAX for INDEX_VERSION if you generate the current index format. */ 61 62hashval_t mapped_index_string_hash (int index_version, const void *p); 63 64/* Symbol name hashing function as specified by DWARF-5. */ 65 66uint32_t dwarf5_djb_hash (const char *str_); 67 68#endif /* DWARF_INDEX_COMMON_H */ 69