271 lines
6.5 KiB
C
271 lines
6.5 KiB
C
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/*-
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* Copyright (c) 2007 John Birrell (jb@freebsd.org)
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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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* $FreeBSD$
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "_libdwarf.h"
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Dwarf_AttrValue
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dwarf_attrval_find(Dwarf_Die die, Dwarf_Half attr)
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{
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Dwarf_AttrValue av;
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STAILQ_FOREACH(av, &die->die_attrval, av_next) {
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if (av->av_attrib == attr)
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break;
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}
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return av;
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}
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int
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dwarf_attrval_add(Dwarf_Die die, Dwarf_AttrValue avref, Dwarf_AttrValue *avp, Dwarf_Error *error)
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{
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Dwarf_AttrValue av;
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int ret = DWARF_E_NONE;
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if ((av = malloc(sizeof(struct _Dwarf_AttrValue))) == NULL) {
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DWARF_SET_ERROR(error, DWARF_E_MEMORY);
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return DWARF_E_MEMORY;
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}
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memcpy(av, avref, sizeof(struct _Dwarf_AttrValue));
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/* Add the attribute value to the list in the die. */
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STAILQ_INSERT_TAIL(&die->die_attrval, av, av_next);
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/* Save a pointer to the attribute name if this is one. */
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if (av->av_attrib == DW_AT_name)
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switch (av->av_form) {
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case DW_FORM_strp:
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die->die_name = av->u[1].s;
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break;
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case DW_FORM_string:
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die->die_name = av->u[0].s;
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break;
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default:
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break;
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}
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if (avp != NULL)
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*avp = av;
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return ret;
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}
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int
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dwarf_attrval_flag(Dwarf_Die die, uint64_t attr, Dwarf_Bool *valp, Dwarf_Error *err)
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{
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Dwarf_AttrValue av;
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int ret = DWARF_E_NONE;
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if (err == NULL)
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return DWARF_E_ERROR;
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if (die == NULL || valp == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
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return DWARF_E_ARGUMENT;
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}
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*valp = 0;
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if ((av = dwarf_attrval_find(die, attr)) == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
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ret = DWARF_E_NO_ENTRY;
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} else {
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switch (av->av_form) {
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case DW_FORM_flag:
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*valp = (Dwarf_Bool) av->u[0].u64;
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break;
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default:
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printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
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__func__,__LINE__,get_form_desc(av->av_form),
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(u_long) av->av_form);
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DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
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ret = DWARF_E_BAD_FORM;
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}
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}
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return ret;
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}
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int
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dwarf_attrval_string(Dwarf_Die die, uint64_t attr, const char **strp, Dwarf_Error *err)
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{
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Dwarf_AttrValue av;
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int ret = DWARF_E_NONE;
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if (err == NULL)
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return DWARF_E_ERROR;
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if (die == NULL || strp == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
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return DWARF_E_ARGUMENT;
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}
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*strp = NULL;
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if (attr == DW_AT_name)
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*strp = die->die_name;
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else if ((av = dwarf_attrval_find(die, attr)) == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
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ret = DWARF_E_NO_ENTRY;
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} else {
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switch (av->av_form) {
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case DW_FORM_strp:
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*strp = av->u[1].s;
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break;
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case DW_FORM_string:
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*strp = av->u[0].s;
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break;
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default:
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printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
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__func__,__LINE__,get_form_desc(av->av_form),
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(u_long) av->av_form);
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DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
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ret = DWARF_E_BAD_FORM;
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}
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}
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return ret;
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}
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int
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dwarf_attrval_signed(Dwarf_Die die, uint64_t attr, Dwarf_Signed *valp, Dwarf_Error *err)
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{
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Dwarf_AttrValue av;
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int ret = DWARF_E_NONE;
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if (err == NULL)
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return DWARF_E_ERROR;
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if (die == NULL || valp == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
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return DWARF_E_ARGUMENT;
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}
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*valp = 0;
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if ((av = dwarf_attrval_find(die, attr)) == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
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ret = DWARF_E_NO_ENTRY;
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} else {
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switch (av->av_form) {
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case DW_FORM_data1:
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case DW_FORM_sdata:
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*valp = av->u[0].s64;
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break;
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default:
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printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
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__func__,__LINE__,get_form_desc(av->av_form),
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(u_long) av->av_form);
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DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
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ret = DWARF_E_BAD_FORM;
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}
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}
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return ret;
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}
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int
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dwarf_attrval_unsigned(Dwarf_Die die, uint64_t attr, Dwarf_Unsigned *valp, Dwarf_Error *err)
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{
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Dwarf_AttrValue av;
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int ret = DWARF_E_NONE;
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if (err == NULL)
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return DWARF_E_ERROR;
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if (die == NULL || valp == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_ARGUMENT);
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return DWARF_E_ARGUMENT;
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}
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*valp = 0;
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if ((av = dwarf_attrval_find(die, attr)) == NULL && attr != DW_AT_type) {
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DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
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ret = DWARF_E_NO_ENTRY;
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} else if (av == NULL && (av = dwarf_attrval_find(die,
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DW_AT_abstract_origin)) != NULL) {
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Dwarf_Die die1;
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Dwarf_Unsigned val;
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switch (av->av_form) {
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case DW_FORM_data1:
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case DW_FORM_data2:
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case DW_FORM_data4:
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case DW_FORM_data8:
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case DW_FORM_ref1:
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case DW_FORM_ref2:
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case DW_FORM_ref4:
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case DW_FORM_ref8:
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case DW_FORM_ref_udata:
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val = av->u[0].u64;
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if ((die1 = dwarf_die_find(die, val)) == NULL ||
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(av = dwarf_attrval_find(die1, attr)) == NULL) {
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DWARF_SET_ERROR(err, DWARF_E_NO_ENTRY);
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ret = DWARF_E_NO_ENTRY;
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}
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break;
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default:
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printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
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__func__,__LINE__,get_form_desc(av->av_form),
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(u_long) av->av_form);
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DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
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ret = DWARF_E_BAD_FORM;
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}
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}
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if (ret == DWARF_E_NONE) {
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switch (av->av_form) {
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case DW_FORM_data1:
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case DW_FORM_data2:
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case DW_FORM_data4:
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case DW_FORM_data8:
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case DW_FORM_ref1:
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case DW_FORM_ref2:
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case DW_FORM_ref4:
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case DW_FORM_ref8:
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case DW_FORM_ref_udata:
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*valp = av->u[0].u64;
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break;
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default:
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printf("%s(%d): av->av_form '%s' (0x%lx) not handled\n",
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__func__,__LINE__,get_form_desc(av->av_form),
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(u_long) av->av_form);
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DWARF_SET_ERROR(err, DWARF_E_BAD_FORM);
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ret = DWARF_E_BAD_FORM;
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}
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}
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return ret;
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}
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