cf781b2e16
This brings a number of fixes to elfcopy/strip and DWARF4 improvements. Sponsored by: The FreeBSD Foundation
313 lines
7.2 KiB
C
313 lines
7.2 KiB
C
/*-
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* Copyright (c) 2007 John Birrell (jb@freebsd.org)
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* Copyright (c) 2009 Kai Wang
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "_libdwarf.h"
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ELFTC_VCSID("$Id: dwarf_attr.c 3064 2014-06-06 19:35:55Z kaiwang27 $");
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int
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dwarf_attr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Attribute *atp,
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Dwarf_Error *error)
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{
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Dwarf_Debug dbg;
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Dwarf_Attribute at;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || atp == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, attr)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*atp = at;
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return (DW_DLV_OK);
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}
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int
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dwarf_attrlist(Dwarf_Die die, Dwarf_Attribute **attrbuf,
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Dwarf_Signed *attrcount, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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int i;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || attrbuf == NULL || attrcount == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if (die->die_ab->ab_atnum == 0) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*attrcount = die->die_ab->ab_atnum;
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if (die->die_attrarray != NULL) {
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*attrbuf = die->die_attrarray;
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return (DW_DLV_OK);
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}
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if ((die->die_attrarray = malloc(*attrcount * sizeof(Dwarf_Attribute)))
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== NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
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return (DW_DLV_ERROR);
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}
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for (i = 0, at = STAILQ_FIRST(&die->die_attr);
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i < *attrcount && at != NULL; i++, at = STAILQ_NEXT(at, at_next))
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die->die_attrarray[i] = at;
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*attrbuf = die->die_attrarray;
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return (DW_DLV_OK);
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}
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int
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dwarf_hasattr(Dwarf_Die die, Dwarf_Half attr, Dwarf_Bool *ret_bool,
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Dwarf_Error *error)
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{
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_bool == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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*ret_bool = (_dwarf_attr_find(die, attr) != NULL);
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return (DW_DLV_OK);
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}
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int
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dwarf_attroffset(Dwarf_Attribute at, Dwarf_Off *ret_off, Dwarf_Error *error)
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{
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Dwarf_Debug dbg;
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dbg = at != NULL ? at->at_die->die_dbg : NULL;
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if (at == NULL || ret_off == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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*ret_off = at->at_offset;
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return (DW_DLV_OK);
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}
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int
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dwarf_lowpc(Dwarf_Die die, Dwarf_Addr *ret_lowpc, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_lowpc == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_low_pc)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_lowpc = at->u[0].u64;
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return (DW_DLV_OK);
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}
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int
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dwarf_highpc(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Error *error)
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{
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return (dwarf_highpc_b(die, ret_highpc, NULL, NULL, error));
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}
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int
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dwarf_highpc_b(Dwarf_Die die, Dwarf_Addr *ret_highpc, Dwarf_Half *ret_form,
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enum Dwarf_Form_Class *ret_class, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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Dwarf_CU cu;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_highpc == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_high_pc)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_highpc = at->u[0].u64;
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if (ret_form != NULL) {
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*ret_form = at->at_form;
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}
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if (ret_class != NULL) {
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cu = die->die_cu;
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*ret_class = dwarf_get_form_class(cu->cu_version,
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DW_AT_high_pc, cu->cu_length_size == 4 ? 4 : 8,
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at->at_form);
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}
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return (DW_DLV_OK);
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}
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int
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dwarf_bytesize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_size == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_byte_size)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_size = at->u[0].u64;
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return (DW_DLV_OK);
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}
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int
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dwarf_bitsize(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_size == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_bit_size)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_size = at->u[0].u64;
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return (DW_DLV_OK);
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}
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int
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dwarf_bitoffset(Dwarf_Die die, Dwarf_Unsigned *ret_size, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_size == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_bit_offset)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_size = at->u[0].u64;
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return (DW_DLV_OK);
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}
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int
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dwarf_srclang(Dwarf_Die die, Dwarf_Unsigned *ret_lang, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_lang == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_language)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_lang = at->u[0].u64;
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return (DW_DLV_OK);
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}
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int
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dwarf_arrayorder(Dwarf_Die die, Dwarf_Unsigned *ret_order, Dwarf_Error *error)
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{
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Dwarf_Attribute at;
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Dwarf_Debug dbg;
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dbg = die != NULL ? die->die_dbg : NULL;
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if (die == NULL || ret_order == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
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return (DW_DLV_ERROR);
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}
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if ((at = _dwarf_attr_find(die, DW_AT_ordering)) == NULL) {
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DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
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return (DW_DLV_NO_ENTRY);
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}
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*ret_order = at->u[0].u64;
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return (DW_DLV_OK);
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}
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