freebsd-dev/contrib/elftoolchain/libdwarf/dwarf_attr.c
Ed Maste cf781b2e16 Update elftoolchain to upstream rev 3130
This brings a number of fixes to elfcopy/strip and DWARF4 improvements.

Sponsored by:	The FreeBSD Foundation
2014-12-24 03:13:16 +00:00

313 lines
7.2 KiB
C

/*-
* Copyright (c) 2007 John Birrell (jb@freebsd.org)
* Copyright (c) 2009 Kai Wang
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "_libdwarf.h"
ELFTC_VCSID("$Id: dwarf_attr.c 3064 2014-06-06 19:35:55Z kaiwang27 $");
int
dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
Dwarf_Error *error)
{
Dwarf_Debug dbg;
Dwarf_Attribute at;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || atp == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, attr)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*atp = at;
return (DW_DLV_OK);
}
int
dwarf_attrlist(Dwarf_Die die, Dwarf_Attribute **attrbuf,
Dwarf_Signed *attrcount, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
int i;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || attrbuf == NULL || attrcount == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if (die->die_ab->ab_atnum == 0) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*attrcount = die->die_ab->ab_atnum;
if (die->die_attrarray != NULL) {
*attrbuf = die->die_attrarray;
return (DW_DLV_OK);
}
if ((die->die_attrarray = malloc(*attrcount * sizeof(Dwarf_Attribute)))
== NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_ERROR);
}
for (i = 0, at = STAILQ_FIRST(&die->die_attr);
i < *attrcount && at != NULL; i++, at = STAILQ_NEXT(at, at_next))
die->die_attrarray[i] = at;
*attrbuf = die->die_attrarray;
return (DW_DLV_OK);
}
int
dwarf_hasattr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool,
Dwarf_Error *error)
{
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_bool == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
*ret_bool = (_dwarf_attr_find(die, attr) != NULL);
return (DW_DLV_OK);
}
int
dwarf_attroffset(Dwarf_Attribute at, Dwarf_Off *ret_off, Dwarf_Error *error)
{
Dwarf_Debug dbg;
dbg = at != NULL ? at->at_die->die_dbg : NULL;
if (at == NULL || ret_off == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
*ret_off = at->at_offset;
return (DW_DLV_OK);
}
int
dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_lowpc == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_low_pc)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_lowpc = at->u[0].u64;
return (DW_DLV_OK);
}
int
dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *error)
{
return (dwarf_highpc_b(die, ret_highpc, NULL, NULL, error));
}
int
dwarf_highpc_b(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Half *ret_form,
enum Dwarf_Form_Class *ret_class, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
Dwarf_CU cu;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_highpc == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_high_pc)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_highpc = at->u[0].u64;
if (ret_form != NULL) {
*ret_form = at->at_form;
}
if (ret_class != NULL) {
cu = die->die_cu;
*ret_class = dwarf_get_form_class(cu->cu_version,
DW_AT_high_pc, cu->cu_length_size == 4 ? 4 : 8,
at->at_form);
}
return (DW_DLV_OK);
}
int
dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_size == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_byte_size)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_size = at->u[0].u64;
return (DW_DLV_OK);
}
int
dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_size == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_bit_size)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_size = at->u[0].u64;
return (DW_DLV_OK);
}
int
dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_size == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_bit_offset)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_size = at->u[0].u64;
return (DW_DLV_OK);
}
int
dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_lang == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_language)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_lang = at->u[0].u64;
return (DW_DLV_OK);
}
int
dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *error)
{
Dwarf_Attribute at;
Dwarf_Debug dbg;
dbg = die != NULL ? die->die_dbg : NULL;
if (die == NULL || ret_order == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
if ((at = _dwarf_attr_find(die, DW_AT_ordering)) == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
*ret_order = at->u[0].u64;
return (DW_DLV_OK);
}