| /* Return list of global definitions. |
| Copyright (C) 2000, 2002 Red Hat, Inc. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2000. |
| |
| This program is Open Source software; you can redistribute it and/or |
| modify it under the terms of the Open Software License version 1.0 as |
| published by the Open Source Initiative. |
| |
| You should have received a copy of the Open Software License along |
| with this program; if not, you may obtain a copy of the Open Software |
| License version 1.0 from http://www.opensource.org/licenses/osl.php or |
| by writing the Open Source Initiative c/o Lawrence Rosen, Esq., |
| 3001 King Ranch Road, Ukiah, CA 95482. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include <libdwarfP.h> |
| |
| |
| struct globallist |
| { |
| Dwarf_Global global; |
| struct globallist *next; |
| }; |
| |
| |
| /* Read the whole given section. */ |
| int |
| dwarf_get_globals (dbg, globals, return_count, error) |
| Dwarf_Debug dbg; |
| Dwarf_Global **globals; |
| Dwarf_Signed *return_count; |
| Dwarf_Error *error; |
| { |
| Dwarf_Small *readp; |
| Dwarf_Small *readendp; |
| struct globallist *globallist = NULL; |
| unsigned int ngloballist = 0; |
| |
| if (dbg->sections[IDX_debug_pubnames].addr == NULL) |
| return DW_DLV_NO_ENTRY; |
| |
| readp = (Dwarf_Small *) dbg->sections[IDX_debug_pubnames].addr; |
| readendp = readp + dbg->sections[IDX_debug_pubnames].size; |
| |
| while (readp < readendp) |
| { |
| Dwarf_Unsigned length; |
| Dwarf_Unsigned info_length; |
| unsigned int length_bytes; |
| unsigned int version; |
| Dwarf_Unsigned offset; |
| Dwarf_Global_Info global_info; |
| |
| /* Each entry starts with a header: |
| |
| 1. A 4-byte or 12-byte length of the set of entries for this |
| compilation unit, not including the length field itself. [...] |
| |
| 2. A 2-byte version identifier containing the value 2 for |
| DWARF Version 2.1. |
| |
| 3. A 4-byte or 8-byte offset into the .debug_info section. [...] |
| |
| 4. A 4-byte or 8-byte length containing the size in bytes of |
| the contents of the .debug_info section generated to |
| represent this compilation unit. [...] */ |
| length = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| length_bytes = 4; |
| if (length == 0xffffffff) |
| { |
| length = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| length_bytes = 8; |
| } |
| |
| version = read_2ubyte_unaligned (dbg, readp); |
| readp += 2; |
| if (unlikely (version != 2)) |
| { |
| __libdwarf_error (dbg, error, DW_E_INVALID_DWARF); |
| return DW_DLV_ERROR; |
| } |
| |
| if (length_bytes == 4) |
| { |
| offset = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| info_length = read_4ubyte_unaligned (dbg, readp); |
| readp += 4; |
| } |
| else |
| { |
| offset = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| info_length = read_8ubyte_unaligned (dbg, readp); |
| readp += 8; |
| } |
| |
| global_info = |
| (Dwarf_Global_Info) malloc (sizeof (struct Dwarf_Global_s)); |
| if (global_info == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| global_info->dbg = dbg; |
| global_info->offset = offset; |
| |
| /* Following the section contains tuples of offsets and |
| nul-terminated strings. */ |
| while (1) |
| { |
| Dwarf_Unsigned die_offset; |
| struct globallist *new_global; |
| |
| if (length_bytes == 4) |
| die_offset = read_4ubyte_unaligned (dbg, readp); |
| else |
| die_offset = read_8ubyte_unaligned (dbg, readp); |
| readp += length_bytes; |
| |
| if (die_offset == 0) |
| /* This closes this entry. */ |
| break; |
| |
| new_global = |
| (struct globallist *) alloca (sizeof (struct globallist)); |
| new_global->global = |
| (Dwarf_Global) malloc (sizeof (struct Dwarf_Global_s)); |
| if (new_global->global == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| new_global->global->offset = die_offset; |
| new_global->global->name = (char *) readp; |
| new_global->global->info = global_info; |
| |
| new_global->next = globallist; |
| globallist = new_global; |
| ++ngloballist; |
| |
| readp = (Dwarf_Small *) rawmemchr (readp, '\0') + 1; |
| } |
| } |
| |
| if (ngloballist == 0) |
| return DW_DLV_NO_ENTRY; |
| |
| /* Allocate the array for the result. */ |
| *return_count = ngloballist; |
| *globals = (Dwarf_Global *) malloc (ngloballist |
| * sizeof (struct Dwarf_Global_s)); |
| if (*globals == NULL) |
| { |
| __libdwarf_error (dbg, error, DW_E_NOMEM); |
| return DW_DLV_ERROR; |
| } |
| |
| while (ngloballist-- > 0) |
| { |
| (*globals)[ngloballist] = globallist->global; |
| globallist = globallist->next; |
| } |
| |
| return DW_DLV_OK; |
| } |