1 /* DWARF 2 location expression support for GDB. 2 3 Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #if !defined (DWARF2LOC_H) 22 #define DWARF2LOC_H 23 24 struct symbol_computed_ops; 25 struct objfile; 26 struct dwarf2_per_cu_data; 27 28 /* This header is private to the DWARF-2 reader. It is shared between 29 dwarf2read.c and dwarf2loc.c. */ 30 31 /* Return the OBJFILE associated with the compilation unit CU. If CU 32 came from a separate debuginfo file, then the master objfile is 33 returned. */ 34 struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu); 35 36 /* Return the address size given in the compilation unit header for CU. */ 37 CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu); 38 39 /* Return the offset size given in the compilation unit header for CU. */ 40 int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu); 41 42 /* Return the text offset of the CU. The returned offset comes from 43 this CU's objfile. If this objfile came from a separate debuginfo 44 file, then the offset may be different from the corresponding 45 offset in the parent objfile. */ 46 CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu); 47 48 struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block 49 (unsigned int offset, struct dwarf2_per_cu_data *per_cu); 50 51 /* The symbol location baton types used by the DWARF-2 reader (i.e. 52 SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol). "struct 53 dwarf2_locexpr_baton" is for a symbol with a single location 54 expression; "struct dwarf2_loclist_baton" is for a symbol with a 55 location list. */ 56 57 struct dwarf2_locexpr_baton 58 { 59 /* Pointer to the start of the location expression. */ 60 const gdb_byte *data; 61 62 /* Length of the location expression. */ 63 unsigned long size; 64 65 /* The compilation unit containing the symbol whose location 66 we're computing. */ 67 struct dwarf2_per_cu_data *per_cu; 68 }; 69 70 struct dwarf2_loclist_baton 71 { 72 /* The initial base address for the location list, based on the compilation 73 unit. */ 74 CORE_ADDR base_address; 75 76 /* Pointer to the start of the location list. */ 77 const gdb_byte *data; 78 79 /* Length of the location list. */ 80 unsigned long size; 81 82 /* The compilation unit containing the symbol whose location 83 we're computing. */ 84 struct dwarf2_per_cu_data *per_cu; 85 }; 86 87 extern const struct symbol_computed_ops dwarf2_locexpr_funcs; 88 extern const struct symbol_computed_ops dwarf2_loclist_funcs; 89 90 #endif /* dwarf2loc.h */ 91