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/* 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;
}
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